JP7791767B2 - Ship desulfurization equipment - Google Patents

Description

This disclosure relates to a marine desulfurization device for desulfurizing exhaust gas emitted from an exhaust gas generation device installed on a ship.

In seawater desulfurization, SOx in exhaust gas is absorbed and removed by seawater through gas-liquid contact with seawater in an absorption tower. Most of the SOx is SO2, which dissolves in water to form hydrogen sulfite and sulfite, which are oxidized to sulfate in oxygen-containing seawater. The sulfates produced are found in large quantities in seawater and have little impact on the marine environment.
(Reaction formula)
SO ₂ + H ₂ O → H ₂ SO ₃ (sulfurous acid) → H ⁺ + HSO ₃ ^- (bisulfite)
HSO ₃ ⁻ (bisulfite) → H ⁺ +SO ₃ ²⁻ (sulfite)
SO ₃ ^2- (sulfite) + 1/2O ₂ → SO ₄ ^2- (sulfate)

The formation of sulfites makes seawater acidic, but this is neutralized to some extent by the alkalinity of seawater.

In recent years, tightening regulations on ship exhaust gas have made it mandatory for emission control areas (ECA areas) to use fuel oil with a sulfur content of 0.1% or less, or to take alternative measures with equivalent effects. Furthermore, by 2020, the use of fuel oil with a sulfur content of 0.5% or less, or to take alternative measures with equivalent effects, will also be mandatory in general sea areas. Previously, ultra-large ships such as ULCSs (Ultra Large Container Ships) have responded by using low-sulfur fuel oil, but it is expected that demand for the installation of desulfurization equipment will increase even on these ultra-large ships in the future.

Patent Document 1 discloses an emergency cooling device that is configured to supply emergency cooling water from an emergency tank that stores emergency cooling water to a spray pipe of an exhaust gas cooling device in an emergency (loss of power) when no absorption liquid is sprayed inside the absorption tower, and spray the emergency cooling water from cooling water nozzles attached to the spray pipe. This emergency cooling device can spray emergency cooling water in an emergency to lower the temperature of the exhaust gas, preventing breakdown of the absorption tower due to the heat of the exhaust gas that remains high without being cooled.

JP 2019-104481 A

The emergency cooling system described in Patent Document 1 requires the provision of an emergency tank for storing emergency cooling water, which poses the problem of the emergency tank occupying part of the onboard space of the ship on which the flue gas desulfurization system is installed. Furthermore, installing an emergency cooling system including an emergency tank on the flue gas desulfurization system could result in the system becoming larger and more expensive. Therefore, there is a demand for a marine desulfurization system that can cool exhaust gas with cooling water in an emergency without having to provide an emergency tank dedicated to emergency cooling water.

In light of the above circumstances, at least one embodiment of the present invention aims to provide a marine desulfurization system that can spray cooling water in an emergency without having to provide an emergency tank dedicated to emergency cooling water.

A marine desulfurization device according to at least one embodiment of the present invention includes:
A ship desulfurization device for desulfurizing exhaust gas discharged from an exhaust gas generation device mounted on a ship,
an absorption tower having an internal space for desulfurizing the flue gas, the absorption tower having an exhaust gas inlet for introducing the flue gas into the internal space;
a spraying device capable of spraying a cleaning liquid into the exhaust gas flowing through the internal space, the spraying device including: a plurality of first spray pipes arranged in the internal space; a first header pipe connected to each of the plurality of first spray pipes; and a plurality of second spray pipes arranged in the internal space below each of the plurality of first spray pipes and the first header pipe;
a cleaning liquid supply device including: a cleaning liquid supply pump configured to pressurize the cleaning liquid; and a cleaning liquid supply pipe configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump to the first header pipe;
a first branch pipe connecting the cleaning liquid supply pipe and each of the plurality of second spray pipes;
an emergency backflow check valve configured to prevent backflow from the cleaning liquid supply pipe to the cleaning liquid supply pump when the cleaning liquid supply pump is stopped, the emergency backflow check valve being provided on the cleaning liquid supply pump side of the connection portion of the cleaning liquid supply pipe with the first branch pipe;
Equipped with.

At least one embodiment of the present invention provides a marine desulfurization system that can spray cooling water in an emergency without having to provide an emergency tank dedicated to emergency cooling water.

1 is a schematic diagram of a marine desulfurization device according to one embodiment. FIG. 2 is an explanatory diagram for explaining a spraying device in a marine desulfurization system according to one embodiment. 1 is a schematic diagram of a marine desulfurization device according to one embodiment. 1 is a schematic diagram of a marine desulfurization device according to one embodiment.

Several embodiments of the present invention will be described below with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention and are merely illustrative examples.

(Ship desulfurization equipment)
Fig. 1 is a schematic diagram of a marine desulfurization apparatus according to one embodiment. The marine desulfurization apparatus 1 is configured to desulfurize exhaust gas discharged from a combustion apparatus (exhaust gas generation apparatus) 11 such as an engine or a boiler. The marine desulfurization apparatus 1 and the combustion apparatus 11 are each mounted on a ship. As shown in Fig. 1 , the marine desulfurization apparatus 1 includes an absorption tower 2 having an internal space 21 for desulfurizing the exhaust gas, a spraying device 3 configured to be able to spray a cleaning liquid onto the exhaust gas flowing through the internal space 21, and a cleaning liquid supplying device 4 configured to supply the cleaning liquid to the spraying device 3.

As shown in Figure 1, the marine desulfurization system 1 removes sulfur oxides from the exhaust gas by bringing the exhaust gas from the exhaust gas generator 11 into contact with a cleaning liquid (absorption liquid) in the internal space 21 of the absorption tower 2 and allowing the cleaning liquid to absorb the sulfur oxides (e.g., sulfur dioxide gas) in the exhaust gas. The marine desulfurization system 1 may also use a cleaning liquid containing an alkaline component such as caustic soda. When caustic soda is used, sodium sulfate is produced as a by-product.

In the following description, when simply referring to the upstream side, it refers to the upstream side along the main flow direction of the fluid in the area or region to which the direction is being described. Similarly, in the following description, when simply referring to the downstream side, it refers to the downstream side along the main flow direction of the fluid in the area or region to which the direction is being described.

(Absorption tower)
The absorption tower 2 has an exhaust gas inlet 22 for introducing exhaust gas into the internal space 21 , and an exhaust gas outlet 23 for discharging the cleaned exhaust gas from the internal space 21 .

In some embodiments, as shown in FIG. 1, the absorber 2 includes an absorber main body 24 having a first internal space 21A through which flue gas flows from bottom to top, and an exhaust gas inlet 25 having a second internal space 21B through which flue gas flows from top to bottom, for guiding the flue gas from the exhaust gas inlet 22 to the first internal space 21A. Each of the first internal space 21A and the second internal space 21B is a part of the internal space 21. The absorber main body 24 is configured to define the first internal space 21A therein. The exhaust gas inlet 25 is configured to define the second internal space 21B therein.

The first internal space 21A includes a first gas-liquid contact section 21C for bringing the exhaust gas and cleaning liquid into gas-liquid contact, and a liquid reservoir section 21D located below the first gas-liquid contact section 21C and in which cleaning liquid that has absorbed sulfur oxides (e.g., sulfur dioxide) in the exhaust gas in the first gas-liquid contact section 21C is stored.

As shown in FIG. 1, the absorber main body 24 is formed with a communication port 26 for introducing exhaust gas from the second internal space 21B to the first internal space 21A. The communication port 26 is located below the first gas-liquid contact section 21C and above the liquid pool section 21D, connecting the first internal space 21A to the second internal space 21B. In other words, the second internal space 21B is connected via the communication port 26 to the first internal space 21A (21E), which is located below the first gas-liquid contact section 21C and above the liquid pool section 21D. The communication port 26 is located below the exhaust gas discharge port 23.

The absorber main body 24 and the flue gas inlet 25 are each formed in a cylindrical shape extending vertically. The lower end of the flue gas inlet 25 is connected to the absorber main body 24, and an flue gas inlet 22 is formed at the upper end of the flue gas inlet 25. The flue gas discharge port 23 is provided above the first gas-liquid contact section 21C of the absorber main body 24. The flue gas discharge port 23 is connected to the first internal space 21A (21F) above the first gas-liquid contact section 21C.

Exhaust gas from the exhaust gas generator 11 is introduced into the second internal space 21B through the exhaust gas inlet 22. The exhaust gas that flows from top to bottom through the second internal space 21B is introduced into the first internal space 21A (21E) through the communication port 26. The exhaust gas that flows from bottom to top through the first internal space 21A is washed with the cleaning liquid as it passes through the first gas-liquid contact section 21C, removing sulfur oxides and other contaminants from the exhaust gas. After being washed with the cleaning liquid, the exhaust gas is discharged outside the absorber 2 through the exhaust gas outlet 23 and released into the atmosphere via a chimney or other means.

(Spraying device)
1, the spraying device 3 includes a plurality of first sprinkler pipes 31 arranged in the internal space 21, a first header pipe 32 connected to each of the plurality of first sprinkler pipes 31, and a plurality of second sprinkler pipes 33 arranged in the internal space 21 below each of the plurality of first sprinkler pipes 31 and the first header pipe 32. Each of the plurality of first sprinkler pipes 31, the first header pipe 32, and the plurality of second sprinkler pipes 33 extends horizontally.

In the illustrated embodiment, each of the multiple first sprinkler pipes 31 is arranged within the first internal space 21A. The first header pipe 32 is provided outside the absorber main body 24 and the flue gas inlet 25. One end of each of the multiple first sprinkler pipes 31 that protrudes outside the absorber main body 24 is connected to the first header pipe 32. Each of the multiple second sprinkler pipes 33 is arranged within the second internal space 21B.

(Watering nozzle)
As shown in Figure 1, the spraying device 3 further includes a plurality of first spray nozzles 34 for spraying cleaning liquid, which are provided on each of the plurality of first spray pipes 31, and a plurality of second spray nozzles 35 for spraying cleaning liquid, which are provided on each of the plurality of second spray pipes 33.

In the illustrated embodiment, each of the multiple first sprinkler nozzles 34 is configured to be able to spray cleaning liquid upward. Each of the multiple first sprinkler nozzles 34 has at least one nozzle hole 341 that opens upward, and is configured to spray cleaning liquid upward from the nozzle hole 341.

In the illustrated embodiment, each of the multiple second sprinkler nozzles 35 is configured to be able to spray cleaning liquid upward. Each of the multiple second sprinkler nozzles 35 has at least one nozzle hole 351 that opens upward, and is configured to spray cleaning liquid upward from the nozzle hole 351.

(Cleaning liquid supply device)
1 , the cleaning liquid supply device 4 includes a cleaning liquid supply pump 41 configured to pressurize the cleaning liquid, and a cleaning liquid supply pipe 42 configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump 41 to the first header pipe 32. One end of the cleaning liquid supply pipe 42 is connected to a cleaning liquid outlet of the cleaning liquid supply pump 41, and the other end of the cleaning liquid supply pipe 42 is connected to the first header pipe 32.

As shown in FIG. 1, the cleaning liquid supply device 4 further includes a cleaning liquid introduction pipe 44 for introducing cleaning liquid from a cleaning liquid storage source 40 configured to store cleaning liquid to the cleaning liquid supply pump 41. In the illustrated embodiment, the cleaning liquid storage source 40 includes a liquid reservoir 21D. One end of the cleaning liquid introduction pipe 44 is connected to a cleaning liquid outlet 241 formed in the absorption tower main body 24 and communicating with the liquid reservoir 21D, and the other end of the cleaning liquid introduction pipe 44 is connected to a cleaning liquid inlet of the cleaning liquid supply pump 41.

By supplying power to the cleaning liquid supply pump 41 and driving it, cleaning liquid is introduced from the cleaning liquid storage source 40 to the cleaning liquid supply pump 41 through the cleaning liquid inlet pipe 44 and pressurized. The cleaning liquid pressurized by the cleaning liquid supply pump 41 is sent to each of the multiple first spray pipes 31 via the cleaning liquid supply pipe 42 and the first header pipe 32, and is sprayed from each of the multiple first spray nozzles 34 onto the exhaust gas passing through the first gas-liquid contact section 21C. The cleaning liquid sprayed from each of the multiple first spray nozzles 34 comes into contact with the exhaust gas and absorbs and removes sulfur oxides (e.g., sulfur dioxide) contained in the exhaust gas. The cleaning liquid sprayed from each of the multiple first spray nozzles 34 and which has absorbed and removed sulfur oxides contained in the exhaust gas falls into the liquid reservoir section 21D and is stored there.

As shown in FIG. 1, the cleaning liquid supply device 4 may further include a cleaning liquid supply line 45 configured to supply cleaning liquid to the liquid reservoir 21D. The cleaning liquid supply line 45 includes a cleaning liquid tank 451 disposed outside the absorber 2 and configured to store cleaning liquid; a cleaning liquid replenishment pipe 452 connected at one end to the cleaning liquid tank 451 and at the other end to a cleaning liquid supply port 242 formed in the absorber main body 24 and communicating with the first internal space 21A above the liquid reservoir 21D; and a cleaning liquid replenishment valve 453 provided on the cleaning liquid replenishment pipe 452. The cleaning liquid replenishment valve 453 has a valve element for opening and closing the cleaning liquid replenishment pipe 452. By changing the opening degree of the valve element, the amount of cleaning liquid supplied to the liquid reservoir 21D through the cleaning liquid replenishment valve 453 can be adjusted.

The absorption tower 2 is configured to circulate the cleaning liquid through the cleaning liquid introduction pipe 44, cleaning liquid supply pipe 42, first header pipe 32, and first spray pipe 31, in that order. The cleaning liquid stored in the liquid reservoir 21D is repeatedly used to scrub the exhaust gas, gradually accumulating sodium sulfate. When the sodium sulfate concentration reaches a certain level or higher, salting out occurs. Therefore, as shown in FIG. 1, the cleaning liquid supply device 4 may further include a cleaning liquid discharge line 47 configured to extract the cleaning liquid containing sodium sulfate from the cleaning liquid supply pipe 42 and send it to wastewater treatment equipment 46.

(filled bed)
As shown in FIG. 1 , the absorber main body 24 may further include a packed bed 27 disposed below the first sprinkler pipes 31 and above the communication ports 26 in the first internal space 21A. The packed bed 27 includes packing materials 271 arranged therein for contacting the cleaning solution sprayed from each of the first sprinkler nozzles 34 and passing downward with the flue gas passing upward. The packed bed 27 (packing material 271) is installed horizontally in the first internal space 21A to increase the contact area (gas-liquid contact area) between the cleaning solution and the flue gas. The cleaning solution sprayed from each of the first sprinkler nozzles 34 falls along the surface of the packing material 271, causing water droplets to adhere to the surface of the packing material 271. As the flue gas passes through gaps formed in the packing material 271, it flows upward while colliding with the surface of the packing material 271. When the exhaust gas collides with the surface of the filler 271, the exhaust gas is washed by water droplets that adhere to the surface.

(Mist Eliminator)
1, the absorber main body 24 may further include a mist eliminator 28 configured to remove moisture from the exhaust gas after cleaning with the cleaning liquid. The mist eliminator 28 is provided in the first internal space 21A (21F) above the first gas-liquid contact section 21C or in the exhaust gas discharge port 23.

(First branch pipe, emergency check valve)
1 , a marine desulfurization apparatus 1 according to some embodiments includes the above-described absorption tower 2, the above-described spray device 3, the above-described cleaning liquid supply device 4, a first branch pipe 51 connecting the cleaning liquid supply pipe 42 to each of the plurality of second spray pipes 33, and an emergency check valve 43 configured to prevent backflow from the cleaning liquid supply pipe 42 to the cleaning liquid supply pump 41 when the cleaning liquid supply pump 41 is stopped. The emergency check valve 43 is provided on the cleaning liquid supply pump 41 side of the connection point P1 of the cleaning liquid supply pipe 42 with the first branch pipe 51. Note that, in the present disclosure, "when the cleaning liquid supply pump 41 is stopped" refers to an emergency such as a sudden stoppage of power supply to the equipment of the marine desulfurization apparatus 1, such as the cleaning liquid supply pump 41. In the present disclosure, "when the cleaning liquid supply pump 41 is operating" refers to a steady state in which power is stably supplied to the equipment of the marine desulfurization apparatus 1, such as the cleaning liquid supply pump 41.

One end of the first branch pipe 51 is connected to the cleaning liquid supply pipe 42, and the other end is connected to each of the multiple second sprinkler pipes 33. The emergency backflow check valve 43 may be a check valve configured so that the valve body prevents backflow due to back pressure of the cleaning liquid, or it may be a solenoid valve configured to close when power is lost (when not energized). The emergency backflow check valve 43 may also be configured to prevent backflow from the cleaning liquid supply pipe 42 to the cleaning liquid supply pump 41 even when the cleaning liquid supply pump 41 is operating.

With the above configuration, when the cleaning liquid supply pump 41 is operating, the cleaning liquid pressurized by the cleaning liquid supply pump 41 is sent to the multiple first spray pipes 31 via the cleaning liquid supply pipe 42 and the first header pipe 32. As a result, the cleaning liquid accumulates inside the first header pipe 32. When the cleaning liquid supply pump 41 is stopped, the emergency check valve 43 prevents backflow from the cleaning liquid supply pipe 42 to the cleaning liquid supply pump 41. Therefore, the cleaning liquid accumulated inside the first header pipe 32 flows down into the multiple second spray pipes 33 arranged below the first header pipe 32 and is sprayed into the internal space 21 of the absorber 2 from the multiple second spray pipes 33 (multiple second spray nozzles 35) as emergency cooling water. In other words, with the above configuration, the cleaning liquid accumulated inside the first header pipe 32 can be used as emergency cooling water. In this way, the marine desulfurization device 1 can spray cleaning liquid (cooling water) from the second spray pipe 33 (second spray nozzle 35) in an emergency, even if it does not have an emergency tank dedicated to emergency cooling water.

In some embodiments, as shown in FIG. 1, each of the plurality of first watering nozzles 34 described above is configured to be able to spray cleaning liquid upward. Each of the plurality of first watering nozzles 34 has at least one nozzle hole 341 that opens upward, and is configured to spray cleaning liquid upward from the nozzle hole 341.

With the above configuration, when the cleaning liquid supply pump 41 is operating, the cleaning liquid pressurized by the cleaning liquid supply pump 41 is sent to the multiple first spray pipes 31 and stored inside the multiple first spray pipes 31. The multiple first spray nozzles 34 are configured to spray the cleaning liquid upward. That is, each of the multiple nozzle holes 341 opens upward. When the cleaning liquid supply pump 41 is stopped, the cleaning liquid stored inside the multiple first spray pipes 31 does not flow out from the nozzle holes 341 of the multiple first spray nozzles 34. Therefore, when the cleaning liquid supply pump 41 is stopped, the cleaning liquid stored inside the multiple first spray pipes 31 flows down into the multiple second spray pipes 33 and is sprayed from the second spray pipes 33 into the internal space 21 of the absorber 2 as emergency cooling water. In other words, with the above configuration, the cleaning liquid stored inside the multiple first spray pipes 31 can be used as emergency cooling water.

In some embodiments, as shown in FIG. 1, the absorber 2 includes an absorber main body 24 having the first internal space 21A described above, and an exhaust gas inlet 25 having the second internal space 21B described above. Each of the multiple first spray pipes 31 is disposed within the first internal space 21A, and each of the multiple second spray pipes 33 is disposed within the second internal space 21B.

With the above configuration, when the cleaning liquid supply pump 41 is stopped, the cleaning liquid stored inside the first header pipe 32 is sprayed from the second spray pipe 33 into the second internal space 21B as emergency cooling water. By spraying cleaning liquid into the second internal space 21B, the exhaust gas flowing through the second internal space 21B can be cooled before being introduced into the first internal space 21A. This makes it possible to prevent damage to equipment installed in the first internal space 21A caused by the heat of the exhaust gas.

For example, in order to improve the corrosion resistance of the inner wall surface of the absorber main body 24 facing the first internal space 21A, a resin sheet may be attached to the inner wall surface, and damage to the resin sheet due to the heat of the exhaust gas can be suppressed. Furthermore, the filler 271 arranged in the packed layer 27 and the mist eliminator 28 may contain a resin material, and damage to the resin material due to the heat of the exhaust gas can be suppressed.

In some of the above-described embodiments, as shown in FIG. 1, the absorption tower 2 includes the absorption tower main body 24 having the above-described first internal space 21A and the flue gas inlet 25 having the above-described second internal space 21B. The spraying device 3 includes a plurality of second spray nozzles 35 provided on each of the plurality of second spray pipes 33. Each of the plurality of second spray pipes 33 is disposed within the second internal space 21B, and the plurality of second spray nozzles 35 includes a plurality of second upward spray nozzles 35A configured to spray cleaning liquid upward.

With the above configuration, when the cleaning liquid supply pump 41 is stopped, the second upward spray nozzle 35A sprays cleaning liquid upward onto the exhaust gas flowing from top to bottom through the second internal space 21B, thereby cooling the exhaust gas. This reduces damage caused by the heat of the exhaust gas that passes around the second upward spray nozzle 35A and is introduced into the first internal space 21A.

In some embodiments, as shown in FIG. 1, the above-described marine desulfurization device 1 further includes a flow rate adjustment valve 52 provided in the first branch pipe 51. The flow rate adjustment valve 52 is configured to open at a predetermined opening rate when the cleaning liquid supply pump 41 is operating. The flow rate adjustment valve 52 is configured to open at a predetermined opening rate both when power is applied and when power is lost (when power is not applied).

The second internal space 21B includes a second gas-liquid contact section 21G for bringing the exhaust gas and cleaning liquid into gas-liquid contact. The second gas-liquid contact section 21G is located above the multiple second spray pipes 33. The second gas-liquid contact section 21G is part of the second internal space 21B.

When the cleaning liquid supply pump 41 is operating, a portion of the cleaning liquid pressurized by the cleaning liquid supply pump 41 is sent to each of the multiple second spray pipes 33 via the connection point P1 between the cleaning liquid supply pipe 42 and the first branch pipe 51 and the first branch pipe 51, and is then sprayed from each of the multiple second spray nozzles 35 onto the exhaust gas passing through the second gas-liquid contact section 21G. The cleaning liquid sprayed from each of the multiple second spray nozzles 35 comes into contact with the exhaust gas, absorbing and removing sulfur oxides (e.g., sulfur dioxide) contained in the exhaust gas and lowering the temperature of the exhaust gas. The cleaning liquid sprayed from each of the multiple second spray nozzles 35 and absorbing and removing sulfur oxides contained in the exhaust gas falls into the liquid reservoir section 21D and is stored there.

With the above configuration, the flow rate adjustment valve 52 provided in the first branch pipe 51 opens to a predetermined opening when the cleaning liquid supply pump 41 is operating. This allows cleaning liquid to be sprayed from the second spray pipe 33 into the internal space 21 not only when the cleaning liquid supply pump 41 is stopped, but also when the cleaning liquid supply pump 41 is operating. In other words, when the cleaning liquid supply pump 41 is operating, the second spray pipe 33 sprays cleaning liquid into the internal space 21, desulfurizing the exhaust gas flowing through the internal space 21 and lowering the temperature of the exhaust gas. By using the second spray pipe 33 as a dual-purpose device when the cleaning liquid supply pump 41 is operating and stopped, the structural complexity of the marine desulfurization device 1 can be reduced.

In some embodiments, the flow rate adjustment valve 52 is configured to open to a greater degree when the cleaning liquid supply pump 41 is stopped than when the cleaning liquid supply pump 41 is operating. The flow rate adjustment valve 52 is configured to open to a greater degree when power is lost (when not energized) than when energized. The flow rate adjustment valve 52 may be an electric valve driven by an electric motor, or an electromagnetic valve driven by passing a current through an electromagnet.

With the above configuration, the flow rate adjustment valve 52 provided on the first branch pipe 51 opens to a greater degree when the cleaning liquid supply pump 41 is stopped than when the cleaning liquid supply pump 41 is operating. This allows the cleaning liquid stored inside the first header pipe 32 to quickly flow down via the first branch pipe 51 to multiple second sprinkler pipes 33. This allows the cleaning liquid (cooling water) to be sent to the second sprinkler pipes 33 at the flow rate required for spraying from the second sprinkler pipes 33 in an emergency.

Figure 2 is an explanatory diagram illustrating a spraying device in a marine desulfurization system according to one embodiment. In some embodiments, the absorber main body 24 and the exhaust gas inlet 25 each have a rectangular cross-section perpendicular to the vertical direction, as shown in Figure 2. In a cross-section perpendicular to the vertical direction, the absorber main body 24 includes a first wall 61 extending along a first direction, a second wall 62 extending along the first direction at a position spaced apart from the first wall 61 in a second direction perpendicular to the first direction, a third wall 63 extending along the second direction and connecting one end of the first wall 61 to one end of the second wall 62, and a fourth wall 64 extending along the second direction at a position spaced apart from the third wall 63 in the first direction and connecting the other end of the first wall 61 to the other end of the second wall 62. The first internal space 21A is formed between the first wall portion 61 and the second wall portion 62 in the second direction, and between the third wall portion 63 and the fourth wall portion 64 in the first direction.

As shown in FIG. 2, the first header pipe 32 is arranged along one of four wall sections 61, 62, 63, and 64 of the absorber main body 24, which has a rectangular cross section perpendicular to the vertical direction. Each of the multiple first sprinkler pipes 31 extends in a direction that intersects (orthogonal in the illustrated example) the extension direction of the first header pipe 32 when viewed from above. Each of the multiple second sprinkler pipes 33 may extend along the extension direction of the first header pipe 32 when viewed from above.

In the embodiment shown in FIG. 2, the first header pipe 32 is arranged along the second wall portion 62 on the outside thereof and extends in the first direction. Each of the multiple first sprinkler pipes 31 extends along the second direction in a top view and is spaced apart from one another in the first direction. Each of the multiple second sprinkler pipes 33 extends along the first direction in a top view and is spaced apart from one another in the second direction. In this case, it is possible to suppress an increase in the length of the first branch pipe 51 and an increase in piping loss that accompanies such an increase. Note that in some other embodiments, the first header pipe 32 may be arranged along the third wall portion 63, the fourth wall portion 64, etc.

The first branch pipe 51 is provided outside the absorber main body 24 and the exhaust gas inlet 25. The first branch pipe 51 may include a second header pipe 51A provided at the other end opposite the one end connected to the cleaning liquid supply pipe 42, and a pipe line 51B connecting the cleaning liquid supply pipe 42 and the second header pipe 51A. The flow rate adjustment valve 52 is provided on the pipe line 51B.

The second header pipe 51A is arranged along one of the four wall portions of the exhaust gas inlet section 25, which has a rectangular cross section perpendicular to the vertical direction. In the embodiment shown in FIG. 2, the second header pipe 51A is arranged along the wall portion extending along the second direction, and extends along the second direction. One end of each of the multiple second sprinkler pipes 33, which protrudes outside the exhaust gas inlet section 25, is connected to the second header pipe 51A. The first header pipe 32 and the second header pipe 51A each have a larger inner diameter than each of the multiple first sprinkler pipes 31 and the multiple second sprinkler pipes 33, in order to increase the storage capacity of the cleaning liquid.

(Second branch pipe, emergency shut-off valve)
Fig. 3 is a schematic diagram of a marine desulfurization apparatus according to one embodiment. In some embodiments, the above-described marine desulfurization apparatus 1 further includes a second branch pipe 53 connecting the cleaning liquid supply pipe 42 and each of the plurality of second spray pipes 33, and an emergency on-off valve 54 provided in the second branch pipe 53. The emergency on-off valve 54 is configured to be closed when the cleaning liquid supply pump 41 is operating and to be opened when the cleaning liquid supply pump 41 is stopped. The uppermost portion of each of the first branch pipe 51 and the second branch pipe 53 is located below the first header pipe 32.

The emergency on-off valve 54 is configured to close when energized and to open at a predetermined angle when power is lost (when de-energized). The emergency on-off valve 54 may be an electric valve driven by an electric motor, or a solenoid valve driven by passing a current through an electromagnet.

In the illustrated embodiment, one end of the second branch pipe 53 is connected to the first header pipe 32 side of the connection point P1 between the cleaning liquid supply pipe 42 and the first branch pipe 51. The connection point between the cleaning liquid supply pipe 42 and the second branch pipe 53 is designated as P2. The other end of the second branch pipe 53 is connected to the second sprinkler pipe 33 (second header pipe 51A) side of the flow rate adjustment valve 52 of the first branch pipe 51 (pipe 51B). Note that one end of the second branch pipe 53 may be connected to the cleaning liquid supply pump 41 side of the connection point P1 between the cleaning liquid supply pipe 42 and the first branch pipe 51, or may be connected to the end connected to the cleaning liquid supply pipe 42 (connection point P1) side of the flow rate adjustment valve 52 of the first branch pipe 51 (pipe 51B).

With the above configuration, the emergency on-off valve 54 provided on the second branch pipe 53 opens when the cleaning liquid supply pump 41 is stopped, allowing the cleaning liquid stored inside the first header pipe 32 to quickly flow down to the multiple second sprinkler pipes 33 via the first branch pipe 51 and the second branch pipe 53. This allows the cleaning liquid (cooling water) to be sent to the second sprinkler pipes 33 at the flow rate required for spraying from the second sprinkler pipes 33 in an emergency. The flow rate adjustment valve 52 may be configured to open or close when the cleaning liquid supply pump 41 is stopped.

Figure 4 is a schematic diagram of a marine desulfurization device according to one embodiment. As shown in Figures 1 to 3, the absorber tower 2 in some of the above-described embodiments includes the absorber tower main body 24 having the first internal space 21A and the flue gas inlet 25 having the second internal space 21B. However, the present disclosure is also applicable to an absorber tower 2 that does not include the flue gas inlet 25, as shown in Figure 4.

As shown in FIG. 4, the marine desulfurization apparatus 1 comprises an absorber 2 including an absorber main body 24 having the first internal space 21A described above, the sprayer 3 described above, the cleaning liquid supply device 4 described above, the first branch pipe 51 described above, and the emergency check valve 43 described above. As shown in FIG. 4, the marine desulfurization apparatus 1 may further comprise the flow rate adjustment valve 52 described above, the second branch pipe 53 described above, and the emergency on-off valve 54 described above. The absorber 2 has an exhaust gas inlet 22 formed at the position where the communication port 26 is formed in the first wall portion 61.

In some embodiments, as shown in FIG. 4, each of the plurality of first sprinkler pipes 31 and the plurality of second sprinkler pipes 33 described above is disposed within the first internal space 21A. In the illustrated embodiment, each of the plurality of second sprinkler pipes 33 is disposed below the plurality of first sprinkler pipes 31 and the packed bed 27, and above the exhaust gas inlet 22 and the liquid reservoir 21D.

With the above configuration, when the cleaning liquid supply pump 41 is stopped, the cleaning liquid stored inside the first header pipe 32 is sprayed as emergency cooling water from each of the multiple second spray pipes 33 into the first internal space 21A below the multiple first spray pipes 31. The spraying of cleaning liquid (cooling water) lowers the temperature of the exhaust gas, thereby preventing damage caused by the heat of the exhaust gas to equipment located above the multiple second spray pipes 33 in the first internal space 21A.

In some embodiments, as shown in FIG. 4, the absorber main body 24 described above includes a packed bed 27 arranged below the first spray pipe 31 and above the second spray pipe 33 in the first internal space 21A. The plurality of second spray nozzles 35 described above include a plurality of second upward spray nozzles 35A configured to spray cleaning liquid upward, and a plurality of second downward spray nozzles 35B arranged in proximity to the exhaust gas inlet 22 and configured to spray cleaning liquid downward.

Note that "close to the exhaust gas inlet 22" means being located closer to the first wall 61 than the second wall 62 in the second direction (left-right direction in FIG. 4). For example, if each of the multiple second sprinkler pipes 33 is arranged along the second direction, the second sprinkler nozzle 35 on each second sprinkler pipe 33 that is closest to the first wall 61 may be designated as the second downward sprinkler nozzle 35B, and the other second sprinkler nozzles 35 may be designated as the second upward sprinkler nozzles 35A. Also, if each of the multiple second sprinkler pipes 33 is arranged along the first direction (perpendicular to the plane of the page in FIG. 4), the multiple second sprinkler nozzles 35 provided on the second sprinkler pipe 33 that is closest to the first wall 61 may be designated as the second downward sprinkler nozzle 35B, and the multiple second sprinkler nozzles 35 provided on the other second sprinkler pipes 33 may be designated as the second upward sprinkler nozzles 35A.

With the above configuration, each of the multiple second downward spray nozzles 35B arranged near the exhaust gas inlet 22 sprays cleaning liquid downward, preventing a decrease in desulfurization performance due to exhaust gas blowing through the wall periphery on the exhaust gas inlet 22 side of the first internal space 21A. Furthermore, the cleaning liquid sprayed from the second downward spray nozzles 35B can quickly cool the exhaust gas introduced into the first internal space 21A through the exhaust gas inlet 22. Each of the multiple second upward spray nozzles 35A can cool the packed bed 27 by spraying cleaning liquid upward, thereby reducing damage to the packed bed 27 caused by the heat of the exhaust gas passing through the packed bed 27.

In this specification, expressions expressing relative or absolute arrangement such as "in a certain direction,""along a certain direction,""parallel,""orthogonal,""center,""concentric," or "coaxial" not only express such an arrangement strictly, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained.
For example, expressions such as "identical,""equal," and "homogeneous" that indicate that something is in an equal state not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained.
Furthermore, in this specification, expressions representing shapes such as a rectangular shape or a cylindrical shape not only represent rectangular shapes or cylindrical shapes in the strict geometric sense, but also represent shapes including uneven portions, chamfered portions, etc., to the extent that the same effect can be obtained.
Furthermore, in this specification, the expressions "comprise,""include," or "have" a component are not exclusive expressions that exclude the presence of other components.

The present disclosure is not limited to the above-described embodiments, but also includes modifications to the above-described embodiments and appropriate combinations of these modifications.
4, the plurality of second sprinkler nozzles 35 include a plurality of second upward sprinkler nozzles 35A and a plurality of second downward sprinkler nozzles 35B arranged in proximity to the exhaust gas inlet 22. However, the plurality of second upward sprinkler nozzles 35A may be replaced with downward sprinkler nozzles, and all of the plurality of second sprinkler nozzles 35 may be downward sprinkler nozzles. By making all of the plurality of second sprinkler nozzles 35 downward sprinkler nozzles, it becomes easier to ensure sufficient cooling time for the exhaust gas introduced from the exhaust gas inlet 22.
For example, in the above-described embodiments of Figures 3 and 4, in order to send the cleaning liquid (cooling water) at a flow rate required for spraying from the second sprinkler pipe 33 in an emergency to the second sprinkler pipe 33, a first branch pipe (and a flow rate adjustment valve 52 provided on the first branch pipe) and a second branch pipe 53 (and an emergency on-off valve 54 provided on the second branch pipe 53) are provided, and the cleaning liquid stored inside the first header pipe 32 is caused to flow down to the second sprinkler pipe 33 through the first branch pipe 51 and the second branch pipe 53. However, by replacing the flow rate adjustment valve 52 provided on the first branch pipe with an emergency on-off valve configured to open when power is lost (when not powered), the second branch pipe 53 and the emergency on-off valve 54 can be omitted. In this case, the first branch pipe 51 and the emergency on-off valve provided in the first branch pipe are dedicated equipment for causing the cleaning liquid (cooling water) stored inside the first header pipe 32 to flow down to the second spray pipe 33 in the event of an emergency.

The contents described in the above-mentioned embodiments can be understood, for example, as follows:

1) A marine desulfurization device (1) according to at least one embodiment of the present disclosure includes:
A marine desulfurization device (1) for desulfurizing exhaust gas discharged from an exhaust gas generation device (11) mounted on a marine vessel,
an absorption tower (2) having an internal space (21) for desulfurizing the flue gas, the absorption tower (2) having an exhaust gas inlet (22) for introducing the flue gas into the internal space (21);
a spraying device (3) capable of spraying a cleaning liquid into the exhaust gas flowing through the internal space (21), the spraying device (3) including: a plurality of first spray pipes (31) arranged in the internal space (21); a first header pipe (32) connected to each of the plurality of first spray pipes (31); and a plurality of second spray pipes (33) arranged in the internal space (21) below each of the plurality of first spray pipes (31) and the first header pipe (32);
a cleaning liquid supply device (4) including a cleaning liquid supply pump (41) configured to pressurize the cleaning liquid, and a cleaning liquid supply pipe (42) configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump (41) to the first header pipe (32);
a first branch pipe (51) connecting the cleaning liquid supply pipe (42) and each of the plurality of second spray pipes (33);
and an emergency backflow prevention valve (43) configured to prevent backflow from the cleaning liquid supply pipe (42) to the cleaning liquid supply pump (41) when the cleaning liquid supply pump (41) is stopped, the emergency backflow prevention valve (43) being provided on the cleaning liquid supply pump (41) side relative to a connection part (P1) of the cleaning liquid supply pipe (42) with the first branch pipe (51).

According to the configuration 1) above, when the cleaning liquid supply pump (41) is operating, the cleaning liquid pressurized by the cleaning liquid supply pump (41) is sent to the multiple first spray pipes (31) via the cleaning liquid supply pipe (42) and the first header pipe (32). As a result, the cleaning liquid accumulates inside the first header pipe (32). When the cleaning liquid supply pump (41) is stopped, the emergency check valve (43) prevents backflow from the cleaning liquid supply pipe (42) to the cleaning liquid supply pump (41). Therefore, the cleaning liquid accumulated inside the first header pipe (32) flows down into the multiple second spray pipes (33) disposed below the first header pipe (32) and is sprayed from the second spray pipes (33) into the internal space (21) of the absorption tower (2) as emergency cooling water. In other words, according to the configuration 1) above, the cleaning liquid accumulated inside the first header pipe (32) can be used as emergency cooling water. In this way, the marine desulfurization device (1) can spray cleaning liquid (cooling water) from the second spray pipe (33) in an emergency, even if it does not have an emergency tank dedicated to emergency cooling water.

2) In some embodiments, the marine desulfurization device (1) described in 1) above,
The cleaning liquid supply system further includes a flow rate control valve (52) provided in the first branch pipe (51), the flow rate control valve (52) being configured to open at a predetermined opening when the cleaning liquid supply pump (41) is in operation.

According to the configuration of 2) above, the flow rate adjustment valve (52) provided in the first branch pipe (51) opens to a predetermined opening when the cleaning liquid supply pump (41) is operating. Therefore, cleaning liquid can be sprayed from the second spray pipe (33) into the internal space (21) not only when the cleaning liquid supply pump (41) is stopped, but also when the cleaning liquid supply pump (41) is operating. In other words, when the cleaning liquid supply pump (41) is operating, the second spray pipe (33) sprays cleaning liquid into the internal space (21), thereby desulfurizing the exhaust gas flowing through the internal space (21) and lowering the temperature of the exhaust gas.

3) In some embodiments, the marine desulfurization device (1) described in 2) above,
The flow rate adjusting valve (52) is configured to open at a larger opening when the cleaning liquid supply pump (41) is stopped than when the cleaning liquid supply pump (41) is operating.

According to the configuration of 3) above, the flow rate adjustment valve (52) provided in the first branch pipe (51) opens to a greater degree when the cleaning liquid supply pump (41) is stopped than when the cleaning liquid supply pump (41) is operating. This allows the cleaning liquid stored inside the first header pipe (32) to quickly flow down through the first branch pipe (51) to multiple second sprinkler pipes (33). This allows the cleaning liquid to be sent to the second sprinkler pipes (33) at a flow rate necessary for spraying from the second sprinkler pipes (33) in an emergency.

4) In some embodiments, the marine desulfurization device (1) described in 2) above,
a second branch pipe (53) connecting the cleaning liquid supply pipe (42) and each of the plurality of second sprinkler pipes (33);
The cleaning system further includes an emergency on-off valve (54) provided in the second branch pipe (53), the emergency on-off valve (54) being configured to be closed when the cleaning liquid supply pump (41) is operating and to be opened when the cleaning liquid supply pump (41) is stopped.

According to the configuration of 4) above, the emergency on-off valve (54) provided in the second branch pipe (53) opens when the cleaning liquid supply pump (41) is stopped, allowing the cleaning liquid stored inside the first header pipe (32) to quickly flow down to the multiple second sprinkler pipes (33) via the first branch pipe (51) and the second branch pipe (53). This allows the cleaning liquid to be sent to the second sprinkler pipes (33) at the flow rate required for spraying from the second sprinkler pipes (33) in an emergency.

5) In some embodiments, the marine desulfurization device (1) according to any one of 1) to 4),
The spraying device (3) further includes a plurality of first spray nozzles (34) provided on each of the plurality of first spray pipes (31), the plurality of first spray nozzles (34) being configured to be able to spray the cleaning liquid upward.

According to the configuration of 5) above, when the cleaning liquid supply pump (41) is operating, the cleaning liquid pressurized by the cleaning liquid supply pump (41) is sent to the multiple first sprinkler pipes (31) and stored inside the multiple first sprinkler pipes (31). Because the multiple first sprinkler nozzles (34) are configured to spray the cleaning liquid upward, when the cleaning liquid supply pump (41) is stopped, the cleaning liquid stored inside the multiple first sprinkler pipes (31) does not flow out from the multiple first sprinkler nozzles (34). Therefore, when the cleaning liquid supply pump (41) is stopped, the cleaning liquid stored inside the multiple first sprinkler pipes (31) flows down into the multiple second sprinkler pipes (33) and is sprayed from the second sprinkler pipes (33) into the internal space (21) of the absorber (2) as emergency cooling water. In other words, with the configuration of 5) above, the cleaning liquid stored inside the multiple first spray pipes (31) can be used as cooling water in emergencies.

6) In some embodiments, the marine desulfurization device (1) according to any one of 1) to 5),
The absorption tower (2)
an absorber body (24) having a first internal space (21A) in which the exhaust gas flows from below to above, the first internal space (21A) being a part of the internal space (21);
an exhaust gas introduction part (25) having a second internal space (21B) which is a part of the internal space (21) and through which the exhaust gas flows from above to below, for guiding the exhaust gas from the exhaust gas introduction port (22) to the first internal space (21A);
Each of the plurality of first sprinkler pipes (31) is disposed within the first internal space (21A), and each of the plurality of second sprinkler pipes (33) is disposed within the second internal space (21B).

According to the configuration of 6) above, when the cleaning liquid supply pump (41) is stopped, the cleaning liquid stored inside the first header pipe (32) is sprayed from the second spray pipe (33) into the second internal space (21B) as emergency cooling water. By spraying cleaning liquid into the second internal space (21B), the exhaust gas flowing through the second internal space (21B) can be cooled before being introduced into the first internal space (21A). This makes it possible to suppress damage to equipment installed in the first internal space (21A) caused by the heat of the exhaust gas.

7) In some embodiments, the marine desulfurization device (1) described in 6) above,
The spraying device (3) further includes a plurality of second spray nozzles (35) provided on each of the plurality of second spray pipes (33),
The plurality of second sprinkler nozzles (35) include a plurality of second upward sprinkler nozzles (35A) configured to be able to spray the cleaning liquid upward.

According to the configuration of 7) above, when the cleaning liquid supply pump (41) is stopped, the second upward spray nozzle (35A) sprays cleaning liquid upward onto the exhaust gas flowing from top to bottom through the second internal space (21B), thereby cooling the exhaust gas. This makes it possible to suppress damage caused by the heat of the exhaust gas that passes around the second upward spray nozzle (35A) and is introduced into the first internal space (21A).

8) In some embodiments, the marine desulfurization device (1) according to any one of 1) to 5),
The absorption tower (2)
an absorber body (24) having a first internal space (21A) in which the exhaust gas flows from below to above, the first internal space (21A) being at least a part of the internal space (21);
Each of the plurality of first sprinkler pipes (31) and the plurality of second sprinkler pipes (33) is disposed within the first internal space (21A).

According to the configuration of 8) above, when the cleaning liquid supply pump (41) is stopped, the cleaning liquid stored inside the first header pipe (32) is sprayed as emergency cooling water from each of the multiple second spray pipes (33) into the first internal space (21A) below the multiple first spray pipes (31). The spraying of cleaning liquid (cooling water) lowers the temperature of the exhaust gas, thereby preventing damage caused by the heat of the exhaust gas to equipment located above the multiple second spray pipes (33) in the first internal space (21A).

9) In some embodiments, the marine desulfurization device (1) described in 8) above,
the absorption tower main body (24) includes a packed bed (27) arranged below the first sprinkler pipe (31) and above the second sprinkler pipe (33) in the first internal space (21A),
The spraying device (3) further includes a plurality of second spray nozzles (35) provided on each of the plurality of second spray pipes (33),
The plurality of second sprinkler nozzles (35)
a plurality of second upward spray nozzles (35A) configured to be able to spray the cleaning liquid upward;
and a plurality of second downward spray nozzles (35B) arranged in the vicinity of the exhaust gas inlet (22) and configured to be able to spray the cleaning liquid downward.

According to the configuration of 9) above, each of the multiple second downward spray nozzles (35B) arranged in proximity to the flue gas inlet (22) sprays cleaning liquid downward, thereby preventing a decrease in desulfurization performance due to exhaust gas blowing through the wall periphery on the flue gas inlet (22) side of the first internal space (21A). Furthermore, the cleaning liquid sprayed from the second downward spray nozzles (35B) can quickly cool the flue gas introduced into the first internal space (21A) through the flue gas inlet (22). Each of the multiple second upward spray nozzles (35A) can cool the packed bed (27) by spraying cleaning liquid upward, thereby suppressing damage to the packed bed (27) due to the heat of the exhaust gas passing through the packed bed (27).

1 Marine desulfurization device 2 Absorption tower 3 Spraying device 4 Cleaning liquid supply device 11 Exhaust gas generator 21 Internal space 21A First internal space 21B Second internal space 21C First gas-liquid contact section 21D Liquid pool section 21G Second gas-liquid contact section 22 Exhaust gas inlet 23 Exhaust gas outlet 24 Absorber main body 25 Exhaust gas inlet 26 Communication port 27 Packed layer 28 Mist eliminator 31 First sprinkler pipe 32 First header pipe 33 Second sprinkler pipe 34 First sprinkler nozzle 35 Second sprinkler nozzle 40 Storage source 41 Cleaning liquid supply pump 42 Cleaning liquid supply pipe 43 Emergency backflow prevention valve 44 Cleaning liquid introduction pipe 45 Cleaning liquid supply line 46 Wastewater treatment equipment 47 Cleaning liquid discharge line 51 First branch pipe 51A Second header pipe 51B Pipe 52 Flow rate adjustment valve 53 Second branch pipe 54 Emergency on-off valve 61 First wall portion 62 Second wall portion 63 Third wall portion 64 Fourth wall portion

Claims (9)

A ship desulfurization device for desulfurizing exhaust gas discharged from an exhaust gas generation device mounted on a ship,
an absorption tower having an internal space for desulfurizing the flue gas, the absorption tower having an exhaust gas inlet for introducing the flue gas into the internal space;
a spraying device capable of spraying a cleaning liquid into the exhaust gas flowing through the internal space, the spraying device including: a plurality of first spray pipes arranged in the internal space; a first header pipe connected to each of the plurality of first spray pipes; and a plurality of second spray pipes arranged in the internal space below each of the plurality of first spray pipes and the first header pipe;
a cleaning liquid supply device including: a cleaning liquid supply pump configured to pressurize the cleaning liquid; and a cleaning liquid supply pipe configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump to the first header pipe;
a first branch pipe connecting the cleaning liquid supply pipe and each of the plurality of second spray pipes;
an emergency backflow check valve configured to prevent backflow from the cleaning liquid supply pipe to the cleaning liquid supply pump when the cleaning liquid supply pump is stopped, the emergency backflow check valve being provided on the cleaning liquid supply pump side of the connection portion of the cleaning liquid supply pipe with the first branch pipe;
Equipped with
The exhaust gas flowing through the internal space passes through the second sprinkler pipe and then reaches the first sprinkler pipe,
The first header pipe is arranged between the first sprinkler pipe and the second sprinkler pipe in the height direction.
Desulfurization equipment for ships. A ship desulfurization device for desulfurizing exhaust gas discharged from an exhaust gas generation device mounted on a ship,
an absorption tower having an internal space for desulfurizing the flue gas, the absorption tower having an exhaust gas inlet for introducing the flue gas into the internal space;
a spraying device capable of spraying a cleaning liquid into the exhaust gas flowing through the internal space, the spraying device including: a plurality of first spray pipes arranged in the internal space; a first header pipe connected to each of the plurality of first spray pipes; and a plurality of second spray pipes arranged in the internal space below each of the plurality of first spray pipes and the first header pipe;
a cleaning liquid supply device including: a cleaning liquid supply pump configured to pressurize the cleaning liquid; and a cleaning liquid supply pipe configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump to the first header pipe;
a first branch pipe connecting the cleaning liquid supply pipe and each of the plurality of second spray pipes;
an emergency backflow check valve configured to prevent backflow from the cleaning liquid supply pipe to the cleaning liquid supply pump when the cleaning liquid supply pump is stopped, the emergency backflow check valve being provided on the cleaning liquid supply pump side of the connection portion of the cleaning liquid supply pipe with the first branch pipe;
Equipped with
a flow rate adjustment valve provided in the first branch pipe, the flow rate adjustment valve being configured to open at a predetermined opening when the cleaning liquid supply pump is operating;
the flow rate adjustment valve is configured to open at a larger opening when the cleaning liquid supply pump is stopped than when the cleaning liquid supply pump is operating.
Desulfurization equipment for ships. A ship desulfurization device for desulfurizing exhaust gas discharged from an exhaust gas generation device mounted on a ship,
an absorption tower having an internal space for desulfurizing the flue gas, the absorption tower having an exhaust gas inlet for introducing the flue gas into the internal space;
a spraying device capable of spraying a cleaning liquid into the exhaust gas flowing through the internal space, the spraying device including: a plurality of first spray pipes arranged in the internal space; a first header pipe connected to each of the plurality of first spray pipes; and a plurality of second spray pipes arranged in the internal space below each of the plurality of first spray pipes and the first header pipe;
a cleaning liquid supply device including: a cleaning liquid supply pump configured to pressurize the cleaning liquid; and a cleaning liquid supply pipe configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump to the first header pipe;
a first branch pipe connecting the cleaning liquid supply pipe and each of the plurality of second spray pipes;
an emergency backflow check valve configured to prevent backflow from the cleaning liquid supply pipe to the cleaning liquid supply pump when the cleaning liquid supply pump is stopped, the emergency backflow check valve being provided on the cleaning liquid supply pump side of the connection portion of the cleaning liquid supply pipe with the first branch pipe;
Equipped with
a flow rate adjustment valve provided in the first branch pipe, the flow rate adjustment valve being configured to open at a predetermined opening when the cleaning liquid supply pump is operating;
a second branch pipe connecting the cleaning liquid supply pipe and each of the plurality of second spray pipes;
an emergency on-off valve provided in the second branch pipe, the emergency on-off valve being configured to be closed when the cleaning liquid supply pump is operating and to be opened when the cleaning liquid supply pump is stopped;
Desulfurization equipment for ships. A ship desulfurization device for desulfurizing exhaust gas discharged from an exhaust gas generation device mounted on a ship,
an absorption tower having an internal space for desulfurizing the flue gas, the absorption tower having an exhaust gas inlet for introducing the flue gas into the internal space;
a spraying device capable of spraying a cleaning liquid into the exhaust gas flowing through the internal space, the spraying device including: a plurality of first spray pipes arranged in the internal space; a first header pipe connected to each of the plurality of first spray pipes; and a plurality of second spray pipes arranged in the internal space below each of the plurality of first spray pipes and the first header pipe;
a cleaning liquid supply device including: a cleaning liquid supply pump configured to pressurize the cleaning liquid; and a cleaning liquid supply pipe configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump to the first header pipe;
a first branch pipe connecting the cleaning liquid supply pipe and each of the plurality of second spray pipes;
an emergency backflow check valve configured to prevent backflow from the cleaning liquid supply pipe to the cleaning liquid supply pump when the cleaning liquid supply pump is stopped, the emergency backflow check valve being provided on the cleaning liquid supply pump side of the connection portion of the cleaning liquid supply pipe with the first branch pipe;
Equipped with
The absorption tower comprises:
an absorber body having a first internal space in which the exhaust gas flows from below to above, the first internal space being at least a part of the internal space;
Each of the plurality of first sprinkler pipes and the plurality of second sprinkler pipes is disposed within the first internal space.
Desulfurization equipment for ships. A ship desulfurization device for desulfurizing exhaust gas discharged from an exhaust gas generation device mounted on a ship,
an absorption tower having an internal space for desulfurizing the flue gas, the absorption tower having an exhaust gas inlet for introducing the flue gas into the internal space;
a spraying device capable of spraying a cleaning liquid into the exhaust gas flowing through the internal space, the spraying device including: a plurality of first spray pipes arranged in the internal space; a first header pipe connected to each of the plurality of first spray pipes; and a plurality of second spray pipes arranged in the internal space below each of the plurality of first spray pipes and the first header pipe;
a cleaning liquid supply device including: a cleaning liquid supply pump configured to pressurize the cleaning liquid; and a cleaning liquid supply pipe configured to supply the cleaning liquid pressurized by the cleaning liquid supply pump to the first header pipe;
a first branch pipe connecting the cleaning liquid supply pipe and each of the plurality of second spray pipes;
an emergency backflow check valve configured to prevent backflow from the cleaning liquid supply pipe to the cleaning liquid supply pump when the cleaning liquid supply pump is stopped, the emergency backflow check valve being provided on the cleaning liquid supply pump side of the connection portion of the cleaning liquid supply pipe with the first branch pipe;
Equipped with
When the cleaning liquid supply pump is stopped, the cleaning liquid stored inside the first header pipe is caused to flow down into each of the plurality of second spray pipes.
Desulfurization equipment for ships. The spraying device further includes a plurality of first spray nozzles provided on the plurality of first spray pipes, each of the plurality of first spray nozzles being configured to be able to spray the cleaning liquid upward.
The desulfurization device for a ship according to any one of claims 1 to 5 . The absorption tower comprises:
an absorber body having a first internal space that is a part of the first internal space, through which the exhaust gas flows from below to above;
an exhaust gas inlet having a second internal space, through which the exhaust gas flows from above downward, for guiding the exhaust gas from the exhaust gas inlet to the first internal space, the second internal space being a part of the internal space;
Each of the plurality of first sprinkler pipes is disposed within the first internal space, and each of the plurality of second sprinkler pipes is disposed within the second internal space.
The desulfurization device for a ship according to any one of claims 1 to 5 . The sprinkler device further includes a plurality of second sprinkler nozzles provided on each of the plurality of second sprinkler pipes,
The plurality of second watering nozzles include a plurality of second upward watering nozzles configured to be able to spray the cleaning liquid upward.
The desulfurization device for a ship according to claim 7 . the absorption tower main body includes a packed bed arranged below the first sprinkler pipe and above the second sprinkler pipe in the first internal space,
The sprinkler device further includes a plurality of second sprinkler nozzles provided on each of the plurality of second sprinkler pipes,
The plurality of second watering nozzles are
a plurality of second upward spray nozzles configured to be able to spray the cleaning liquid upward;
a plurality of second downward spray nozzles arranged in proximity to the exhaust gas inlet and configured to be able to spray the cleaning liquid downward;
The desulfurization device for a ship according to claim 4 .