JP7561982B2 - Intake type smoke removal equipment - Google Patents

Description

The present invention relates to a smoke removal system installed in a building, and more specifically, to an intake-type smoke removal system that quickly draws in smoke and toxic gases generated during a fire and removes them by mixing them with water, thereby preventing smoke from spreading to designated smoke removal zones, fire rooms (living rooms), evacuation routes such as corridors and stairs, thereby preventing the inflow of smoke and toxic gases and minimizing damage to human life.

In recent years, most buildings constructed are required to be equipped with various firefighting equipment that meets the standards set out in the strengthened Building Fire Service Act. Such firefighting equipment includes fire extinguishing equipment, smoke exhaust equipment, smoke removal (control) equipment, alarm equipment, evacuation equipment, fire water equipment, and equipment related to firefighting activities. Needless to say, the basic purpose of firefighting equipment is to minimize damage to human life and property caused by fire, such as by detecting fires early, protecting or evacuating people in buildings, and enabling firefighting activities at the initial stage.

Of the various types of equipment mentioned above, smoke removal (control) equipment is a positive pressure equipment that, in the event of a fire, blows air into each floor, raising the internal pressure of the escape routes within the building above the pressure of the smoke and toxic gases, blocking the inflow of smoke and toxic gases into the escape routes and preventing suffocation of escapees. Whereas smoke exhaust equipment is a facility that expels toxic gases outside the building, smoke removal equipment blocks and maintains the entry of toxic gases.

In other words, smoke removal (control) equipment is a type of fire extinguishing equipment that detects smoke generated in the early stages of a building fire, exhausts smoke from the fire room (living room), and prevents smoke from spreading to escape routes such as corridors and stairs, protecting residents from smoke and allowing them to evacuate safely. At the same time, it controls the smoke (Smoke Control) and exhausts it outside (Fire Smoke Ventilation) so that the fire brigade can carry out firefighting activities.

Depending on where it is installed, smoke removal (control) equipment can be divided into living room smoke removal (control) equipment and stairwell and ancillary room smoke removal (control) equipment, but the technical content is almost the same.

Living room smoke removal (control) equipment includes an intake air blower and an exhaust air blower that exhaust smoke and hot air from a living room in the event of a fire. The intake air blower supplies more air than the exhaust air blower exhausts, allowing evacuation and firefighting activities to take place. Additionally, stairwell and ancillary room smoke removal (control) equipment is equipment that protects evacuees from toxic gases by making the internal pressure of the stairwell and ancillary rooms (hereafter referred to as smoke removal areas) higher than that of the living room, thereby preventing smoke from the living room from entering the area.

Meanwhile, conventional smoke control equipment for stairwells and ancillary rooms uses a control fan and vertical air duct to supply outside air to the smoke control area. In other words, the fan installed underground or on the roof supplies air into the smoke control area through a smoke damper to increase the pressure and prevent smoke from entering the smoke control area. However, this type of smoke control equipment does not function properly if pressure escapes to the outside of the controlled area (windows, entrances and exits), and the corridors and staircases of the controlled area become filled with smoke and toxic gases, causing suffocation for escapees. This has already been found to be unnecessary through various news reports and official on-site experiments and inspections.

Figures 1 and 2 are diagrams to explain the problems with conventional smoke removal (control) equipment.

As shown in the figure, an air duct 11 is provided between the living space 13 of the building 10 and the smoke-free (controlled) area 15. The air duct 11 is a vertical duct provided in a common passage (common sewer; not shown) and guides air supplied from a basement ventilation fan 17 upward. It has been found through several field experiments and inspections that the air moving through the air duct may malfunction and cause excessive air to flow through the smoke dampers 15a provided in the corridors and staircases of the smoke-free (controlled) area 15 on each floor. This causes the pressure inside the smoke-free area to rise above the allowable value, making it impossible for not only the elderly and infirm, but also healthy adult men to open the doors to the living space 13 and therefore impossible to escape.

When the window 15c or the entrance 15e of the smoke removal (control) area 15 is open, the internal pressure of the smoke removal (control) area cannot rise, as if a car tire had a flat tire, so no matter how much air is supplied to the blower fan 17, the internal pressure of the smoke removal area will not increase.

In addition, various additional devices are applied to seal the corridors, staircases, etc. of the smoke-free (controlled) area 15, but if the corridors, staircases, etc. are completely sealed, there is no ventilation in real life, and the temperature inside the smoke-free (controlled) area 15 rises to over 40°C in midsummer, causing indescribable inconvenience to the residents (especially children, the elderly, and the disabled), such as clothes becoming soaked with sweat while waiting for the elevator, resulting in many side effects.

Regardless of whether the smoke removal (control) area is sealed or not, in order to maintain comfort in everyday, real-life spaces in all seasons, to ensure safe evacuation routes and maximum evacuation time in the event of a fire, and to save even one life, there is an urgent need for technological capabilities to remove as many highly toxic gases as possible, such as hydrogen chloride (HCL) and hydrogen cyanide (HCN), which are deadly to the human body, from evacuation routes and reduce the lethal dose of various toxic gases below a safe range.

The present invention has been made to solve the above problems, and aims to provide an intake-type smoke removal system that can prevent smoke and toxic gases from moving into the smoke removal area in the event of a fire, thereby minimizing loss of life, purify indoor air even when there is no fire, and can be used to prevent the emission of pollutants at industrial sites that emit pollutants.

As a means for solving the problems for achieving the above-mentioned object, the intake type smoke removal equipment of the present invention exhausts gas flowing into a smoke removal area to the outside of the smoke removal area, and comprises a vacuum generating multi-stage venturi that passes water provided from the outside and generates negative pressure due to the Venturi effect while the water passes, thereby drawing in gas inside the smoke removal area and mixing the drawn in gas with the water and discharging it, a water supply unit that supplies water to the vacuum generating multi-stage venturi, and a nozzle that sprays the water supplied through the water supply unit into the vacuum generating multi-stage venturi, and the vacuum generating multi-stage venturi is installed in a common passage that communicates with the smoke removal area of each floor through a through passage, and is provided with the nozzle at its upper end, an injection pipe that sprays the water sprayed from the nozzle downward, and a venturi casing that surrounds the injection pipe and guides the water sprayed through the injection pipe downward, the diameter of which expands as it goes downward .

The water supply section also includes a water supply pump for pumping water, a main water supply pipe for guiding the water pumped by the water supply pump to the vacuum generating multi-stage venturi, and a branch pipe connected to the main water supply pipe, extending toward the inlet of the vacuum generating multi-stage venturi, and connected to the nozzle.

The vacuum generating multi-stage venturis are arranged vertically at a distance from each other, and between each vacuum generating multi-stage venturi there is a blocking guide plate that prevents water sprayed from the upper vacuum generating multi-stage venturi from hitting the lower vacuum generating multi-stage venturi.

It also includes a mixing conduit that extends vertically, houses a vacuum-generating multi-stage venturi and a blocking guide plate, and guides the mixture of water and gas ejected from the vacuum-generating multi-stage venturi to the lower portion.

The injection pipe includes a first injection pipe connected to the nozzle and having an inlet for receiving gas and water at the same time and an outlet for the water mixed with gas to escape, and a second injection pipe that houses the first injection pipe and has an inlet for sucking in gas and an outlet for mixing the inflowing gas and the gas-mixed water ejected from the first injection pipe and discharging the mixture. The outlets of the first injection pipe and the second injection pipe are formed with mixing blades that collide with the inflowing water and gas to mix the water and gas.

The venturi casing also includes a fixed tube that houses the second injection tube and has an inlet at its upper end for drawing in gas, a rotary tube that is rotatably mounted at the lower end of the fixed tube, and impeller blades that are located inside the rotary tube and collide with the injected water, receiving kinetic energy from the water to rotate the rotary tube.

The lower end of the fixed tube is formed with a housing groove that extends in the circumferential direction and has a constant cross-sectional shape along the circumferential direction, and the upper end of the rotating tube is formed with a bent insertion end that is inserted and supported in the housing groove and can slide in the circumferential direction when inserted in the housing groove.

In addition, an oil-free solid lubricant coating or a ring-shaped bearing is further provided between the bent insertion end and the receiving groove.

A water pump is also provided to recycle the water discharged through the mixing conduit.

The inhalation type smoke removal equipment of the present invention, constructed in this way, creates negative pressure in the event of a fire, inhales surrounding smoke and toxic gases, mixes them with water and expels them to the outside, preventing smoke and toxic gases from moving into the smoke removal area and minimizing damage to human life.

Even in situations where no fire has broken out, the device can purify the air inside the room by sucking in and removing various airborne pollutants such as yellow sand and fine dust. It can also be used as an air purifier for agricultural, marine and military use, as well as in industrial sites such as coal yards, cement factories, construction sites, refineries, steel mills and shipyards that emit dust, oil vapor or toxic chemicals.

FIG. 1 is a diagram for explaining problems with a conventional smoke removal (control) and fire smoke ventilation (fire smoke ventilation) facility. FIG. 1 is a diagram for explaining problems with a conventional smoke removal (control) and fire smoke ventilation (fire smoke ventilation) facility. FIG. 2 is a diagram for explaining the basic structure and operation of an intake type smoke removal system according to an embodiment of the present invention. FIG. 2 is a diagram for explaining the basic structure and operation of an intake type smoke removal system according to an embodiment of the present invention. FIG. 1 is a diagram showing the configuration of an intake type smoke removal (smoke removal system) equipment according to an embodiment of the present invention. FIG. 1 is a diagram showing the configuration of an intake type smoke removal (smoke removal system) equipment according to an embodiment of the present invention. FIG. 6 is a diagram for explaining the structure of the vacuum generating multi-stage venturi shown in FIG. 5 .

Below, one embodiment of the present invention will be described in more detail with reference to the attached drawings.

The inhalation type smoke removal equipment of the present invention rapidly inhales smoke and toxic gases generated during a fire, mixes them with water, and discharges them to the outside, thereby preventing smoke and toxic gases from entering the designated smoke removal area and minimizing damage to human life.

In other words, the smoke and toxic gases generated during a fire are quickly sucked in and then mixed with water to remove them, preventing smoke from spreading to designated smoke removal zones, the fire room (living room), and escape routes such as corridors and stairs, thereby preventing the inflow of smoke and toxic gases and minimizing loss of life.

It has a structure that sucks in high-temperature smoke and toxic gases that have expanded and become highly pressurized due to the heat of the air, mixes them with water, and removes and cools gaseous and liquid particulate toxic gases by dissolving and diluting them in water, and removes solid particulate soot, soot, ultrafine dust, and ultrafine particles through physical adsorption.

The present invention can be widely used in a variety of fields, including smoke removal from subway stations, underground facilities and underground parking lots, various multi-use facilities, and various tunnels, removal of various ultrafine industrial solid particulate dust, military gas and liquid particulate systems, solid particulate systems, various chemical substances, and toxic gas detoxification equipment, commercial and hospital equipment, agricultural and livestock sterilization and quarantine equipment, and adsorption and removal of malodorous components from gas and liquid particulate systems.

Figures 3 and 4 are diagrams for explaining the basic concept and operation method of an intake-type smoke removal system according to one embodiment of the present invention, and Figures 5 and 6 are diagrams showing in more detail the configuration of an intake-type smoke removal system according to one embodiment of the present invention.

As shown in the figure, the intake-type smoke removal system 30 of this embodiment includes a mixing conduit 43, a plurality of vacuum-generating multi-stage venturis 50, a blocking guide plate 37, a water supply section, and a nozzle 51. The smoke removal system 30 of this embodiment is located between the living space 13 and the smoke removal area 15 in the building 10.

Generally, a vertical common passage (no reference number) is provided between the residential space 13 and the smoke removal area 15 of a building, but the smoke removal equipment 30 of this embodiment is provided in the common passage. The common passage does not separate the residential space 13 and the smoke removal area 15. It goes without saying that people in the residential space 13 can move to the smoke removal area 15.

In addition, the residential space 13 in this description is the space where the people using the building 10 are mainly located. For example, if the building is an office building, the residential space 13 would be an office, a conference room, or a dining room. Also, if the building is an apartment or officetel, the residential space would be the space within each household.

The smoke-free area 15 may be a corridor, stairwell, or other auxiliary room used to escape the building in an emergency. The smoke-free area is, so to speak, a passageway through which people in the building pass or escape in the event of a fire, and therefore smoke and toxic gases must not enter.

The intake type smoke removal equipment 30 according to this embodiment is placed outside the smoke removal area 15 and is connected to the smoke removal area 15 on each floor via the smoke removal damper 15a. If negative pressure is created in the mixing duct 43, the air inside the smoke removal area 15 is sucked into the mixing duct 43. The smoke removal damper 15a connects the outside and inside of the smoke removal area 15.

In conclusion, the intake type smoke removal equipment 30 of this embodiment is installed outside the smoke removal area 15 and exhausts gases that flow into the smoke removal area during a fire to the outside of the smoke removal area, making it possible to escape or evacuate through the smoke removal area. A person in need of rescue who escapes from the living space 13 during a fire can move to the smoke removal area 15 and safely escape to the outside of the building.

On the other hand, the mixing conduit 43 is a vertically extending pipe that houses the vacuum generating multi-stage venturi 50, the cutoff guide plate 37, and the water supply section, and sends the mixture of water and gas ejected from the vacuum generating multi-stage venturi 50 downward.

The water discharged from the mixing conduit 43 is collected separately and treated as sewage, and in some cases, it can be collected in a separate water tank and purified before being circulated and reused. That is, the water discharged through the lower part of the mixing conduit 43 is collected separately and treated as sewage, or collected in a water tank and purified, and circulated to a smoke and toxic gas intake removal type (intake type smoke removal facility) facility, so that the water can be reused and water can be saved. The shape of the mixing conduit 43 can be changed in any way. In addition, the main water supply pipe 31 can be separately piped outside the mixing conduit 43.

The water supply section supplies water to each vacuum generating multi-stage venturi 50 and includes a water supply pump 39, a main water supply pipe 31, and a branch pipe 33.

The water supply pump 39 serves to pump water supplied from the outside and send it up through the main water supply pipe 31. The water supplied from the outside may be fire water supplied from a fire engine or water stored in a separate water tank. Alternatively, tap water may be used.

The main water supply pipe 31 is a pipe that extends vertically upward and reaches the top floor of the building. The branch pipes 33 are pipes that are connected to the main water supply pipe 31 and extend to the side of each vacuum generating multi-stage venturi 50. Water moving upward through the main water supply pipe 31 passes through the branch pipe 33 and is supplied to the vacuum generating multi-stage venturi 50. The extended end of the branch pipe 33 reaches the center of the upper end of the vacuum generating multi-stage venturi 50 and is connected to the nozzle 51. The nozzle 51 is a nozzle with a built-in vortex inducer (swirl) that sprays water at high speed in a spiral flow pattern (vortex effect pattern), and sprays the water that passes through the branch pipe 33 downward at high speed into the inlet 53a of the first injection pipe 53 described later. As long as a spiral streamline can be formed, the shape of the vortex inducer can be realized in any number of different ways.

Water sprayed into the vacuum-generating multi-stage venturi 50 by the nozzle 51 draws in high-pressure smoke and toxic gases generated during a fire due to the action of negative pressure, such as smoke, toxic gases, fine dust, soot, various unburned combustible gases, and hot air, and mixes them with water to remove liquid particulate toxic gases by dissolving and diluting them, and remove solid particulate soot, soot, ultrafine dust, and various ultrafine dust particles from industrial sites by physical adsorption, and then exits to the bottom in a mixed state with water. Hydrogen cyanide (HCN) and hydrogen fluoride (HF), water-soluble toxic gases that are generated during a fire, dissolve infinitely in water, hydrogen chloride (HCl) dissolves very well in water, and phosgene (COCl2), sulfurous acid gas (SO2), nitrogen dioxide (NO2), and carbon dioxide (CO2) dissolve easily in water.

Meanwhile, the vacuum generating multi-stage venturi 50 passes water supplied through the branch pipe 33, generates negative pressure due to the Venturi effect while the water passes, draws in gas inside the smoke removal area 15, mixes the gas with water and discharges it. That is, as shown in FIG. 5, the gas inside the smoke removal area 15 is drawn in the direction of the arrow e, mixed with water, and then sent downward.

In addition, in this embodiment, three vacuum-generating multi-stage venturis 50 are applied in parallel to each floor. The number of vacuum-generating multi-stage venturis 50 applied to each floor can be changed as much as you like.

The shutoff guide plate 37 is a plate-like member provided between the upper and lower vacuum generating multi-stage venturis 50, and prevents the water jetted downward from the upper vacuum generating multi-stage venturi from hitting the lower vacuum generating multi-stage venturi. After passing through the vacuum generating multi-stage venturi 50, the water hits the shutoff guide plate 37, flows in the direction of the arrow g in Figure 5, and then falls.

Another function of the shutoff guide plate 37 is to guide the gas drawn out through the smoke removal damper 15a so that the gas moves smoothly to the inlet, i.e., the upper end, of the vacuum generating multi-stage venturi 50. In other words, it guides the drawn out gas so that it is quickly sucked into the vacuum generating multi-stage venturi 50 without scattering upwards. As long as it can fulfill this role, the structure of the shutoff guide plate 37 can be changed in any number of ways.

Figures 7a to 7c are diagrams for explaining the structure of the vacuum generating multi-stage venturi 50 shown in Figure 5.

As shown in the figure, the vacuum generating multi-stage venturi 50 has a triple structure of a first injection pipe 53, a second injection pipe 55, and a venturi casing 57. In some embodiments, the vacuum generating multi-stage venturi 50 can be made to have four or more stages.

The first injection pipe 53 is a cylindrical duct with an inlet 53a at the top end and an outlet 53e at the bottom end, and the nozzle 51 is fixed to the top end. Water injected from the nozzle 51 passes through the inlet 53a of the first injection pipe 53 and falls to the bottom. A number of mixing vanes 53b are formed on the bottom side of the first injection pipe 53.

The mixing blades 53b collide with the water descending downwards and act to mix the water evenly with the gas. The gas flows in through the inlet 53a due to the negative pressure created in the vacuum generating multi-stage venturi 50.

The mixing blades 53b are formed by cutting the lower part of the first injection pipe 53 at equal intervals and parallel to the longitudinal direction, and then folding it inward at a regular interval. After the water passing through the first injection pipe 53 collides with the mixing blades 53b, it is mixed with the gas and has a spiral flow pattern (vortex effect pattern).

The second injection pipe 55 is a duct that houses the first injection pipe 53 inside. The length of the second injection pipe 55 is approximately twice the length of the first injection pipe 53. However, the length of the second injection pipe 55 may be different. The distance between the inward surface of the second injection pipe 55 and the outer peripheral surface of the first injection pipe 53 is maintained by the connecting struts 54. The connecting struts 54 support the second injection pipe 55 at regular intervals in the circumferential direction of the first injection pipe 53.

The second injection pipe 55 has an inlet 55c at its upper end and an outlet 55e at its lower end. The inlet 55c is a passage through which surrounding gas is drawn in. The outlet 55e is a passage through which the gas flowing in through the inlet 55c is mixed with the gas-mixed water (a fluid in which water and gas are mixed) ejected from the first injection pipe and then discharged.

The lower end of the second injection pipe 55 also has multiple mixing vanes 55b. The mixing vanes 55b are formed by cutting the lower part of the second injection pipe 55 at regular intervals in the longitudinal direction and then folding the cut parts inward. The mixture of gas and water passing through the second injection pipe 55 collides with the mixing vanes 55b and is mixed again.

The venturi casing 57 houses the first and second injection pipes 53 and 55 and guides the water that is injected through the first and second injection pipes downward. It has a shape in which the diameter expands as it goes downward.

The venturi casing 57 is composed of a fixed tube 58 and a rotating tube 59. The fixed tube 58 is a duct that is fixed to the second injection tube 55 via a connecting strut 56, and the rotating tube 59 is a downwardly extending duct that is rotatably attached to the lower end of the fixed tube 58.

The upper end of the fixed tube 58 is provided with an inlet 57a for sucking in gas, and a support portion 58a is formed at the lower end. The support portion 58a is a portion that supports the rotating tube 59 so that it can rotate about its axis, and is formed by bending the lower end of the fixed tube 58. The support portion 58a has a constant cross-sectional shape along the circumferential direction of the fixed tube 58, and provides a storage groove 58b that is open to the inside.

The rotating tube 59 is a duct whose lower end has an expanded diameter compared to its upper end, and has a bent insertion end 59a at its upper end. The bent insertion end 59a is the portion of the upper end of the rotating tube bent outward, and is inserted and supported in the accommodation groove 58b. The bent insertion end 59a can slide in the circumferential direction while accommodated in the accommodation groove 58b.

In particular, bearings 59e are attached to the upper and lower parts of the folded insertion end 59a. The bearings 59e serve to reduce friction between the folded insertion end 59a and the receiving groove 58b. The rotating tube 59 rotates smoothly while being supported by the support part 58a due to the action of the bearings 59e.

In addition, impeller blades 59g are provided inside the rotating tube 59. The impeller blades 59g are spirally arranged blades that collide with the sprayed water, receive kinetic energy from the water, and rotate the rotating tube 59 on its axis in the direction of the arrow k.

In particular, the water sprayed from the nozzle 51 quickly turns to steam due to the intense heat of the smoke and toxic gases, and its volume expands and vaporizes to approximately 1,700 times its original volume at 1 atmosphere and 100°C, 2,400 times its original volume at 260°C, and over 4,200 times its original volume at 650°C.

During a fire, hot smoke and toxic gases continue to rise and gather in the upper parts of a room, increasing the pressure there. The pressurized smoke and toxic gases (unburned flammable gases, black smoke) spread in directions with lower pressure, and if they reach a certain critical point within about three minutes, they are ignited by radiant heat, causing a flashover phenomenon, and the fire spreads further to the surrounding area. The temperature of the upper parts of the hot smoke and toxic gases can rise by 600-900°C or more due to radiant heat.

If the volume of the fluid passing through the inside of the flow field increases instantaneously due to high-temperature hot air, the flow rate will become even faster. Therefore, the high-speed fluid, i.e., a complex mixture of water vapor, gas, and water, can rapidly reduce the pressure inside the vacuum generating multi-stage venturi 50 according to the Venturi principle, further increasing the suction force. This is because when the internal pressure is lower than 1 atmosphere, vaporization expansion can be induced at temperatures lower than 100°C, and when the pressure is lowered, the vaporization expansion rate becomes even larger, further increasing the injection flow rate.

As a result, high-speed fluid injection occurs inside the venturi due to the vaporization and expansion of the mixed fluid, greatly amplifying the suction force that sucks in smoke and toxic gases. This is the principle by which gases generated during a fire are sucked into the vacuum-generating multi-stage venturi 50.

By virtue of the action of the vacuum generating multi-stage venturi 50, among the gases passing through the vacuum generating multi-stage venturi 50 in the smoke removal equipment of this embodiment, liquid particulate toxic gases are dissolved or diluted in water, solid particulate soot, soot, ultrafine dust, etc. are physically adsorbed to the water, and hot air and expanding water vapor are cooled by the water.

The gases that are generated during a fire are substances that are produced when combustible materials burn. They are high temperature and are a complex mixture of very sticky solid particles, liquid tar-like droplets, phaseless vapor, and gaseous molecules. These toxic gases are dissolved or diluted in water and flow to the bottom of the mixing pipe 43 and are discharged to the outside.

The present invention has been described in detail above through specific examples, but the present invention is not limited to the above examples, and various modifications can be made by those with ordinary skill in the art within the scope of the technical concept of the present invention.

Claims (9)

The gas flowing into the smoke removal area is exhausted to the outside of the smoke removal area,
a vacuum generating multi-stage venturi that allows water provided from the outside to pass through and generates negative pressure by the Venturi effect while the water is passing through, thereby drawing in gas within the smoke removal area, and mixing the drawn-in gas with the water and discharging it;
a water supply section for supplying water to the vacuum generating multi-stage venturi;
a nozzle for injecting water supplied through the water supply portion into the inside of the vacuum generating multi-stage venturi;
The vacuum generating multi-stage venturi is
It is installed in a common passageway that communicates with the smoke removal areas on each floor through a passageway,
A jet pipe having the nozzle at an upper end thereof and jetting water from the nozzle to a lower portion;
A venturi casing that surrounds the injection pipe and guides the water injected through the injection pipe downward, and has a shape in which the diameter expands toward the bottom.
Intake type smoke removal equipment. The water supply unit includes :
The apparatus includes a water supply pump for pumping water, a main water supply pipe for guiding the water pumped by the water supply pump to a vacuum generating multi-stage venturi side, and a branch pipe connected to the main water supply pipe, extending to an inlet side of the vacuum generating multi-stage venturi, and connected to the nozzle.
2. The intake type smoke removal system according to claim 1. The vacuum generating multi-stage venturi is arranged vertically at a distance from one another.
Between each vacuum generating multi-stage venturi, a blocking guide plate is provided to prevent the water jetted from the upper vacuum generating multi-stage venturi from hitting the lower vacuum generating multi-stage venturi.
The intake type smoke removal system according to claim 2. Further included is a mixing conduit extending vertically, housing a vacuum generating multi-stage venturi and a cutoff guide plate, and directing the mixture of water and gas ejected from the vacuum generating multi-stage venturi to a lower portion.
An intake type smoke removal system as claimed in claim 3. The injection pipe is
a first injection pipe coupled to the nozzle and having an inlet for receiving gas simultaneously with water and an outlet for allowing the water mixed with the gas to escape;
The device includes a second injection pipe that houses the first injection pipe and has an inlet for sucking in gas and an outlet for mixing the inflowing gas with the gas-mixed water ejected from the first injection pipe and discharging the resulting mixture,
At the outlets of the first and second injection pipes,
A mixing blade was formed that collides with the inflowing water and gas to mix the water and gas.
2. The intake type smoke removal system according to claim 1 . The venturi casing comprises:
a fixed tube that houses the second injection tube and has an inlet at an upper end for taking in gas;
a rotating tube rotatably provided at a lower end of the fixed tube;
and an impeller blade located inside the rotating tube, which collides with the injected water and receives kinetic energy from the water to rotate the rotating tube.
An intake type smoke removal system as claimed in claim 5 . A receiving groove is formed at a lower end of the fixed tube, the receiving groove extending in a circumferential direction and having a constant cross-sectional shape along the circumferential direction,
The upper end of the rotating tube is formed with a bent insertion end portion which is inserted and supported in the receiving groove and can slide in the circumferential direction while being inserted in the receiving groove.
An intake type smoke removal system as claimed in claim 6 . An oil-free solid lubricating coating or a ring-shaped bearing is further provided between the bent insertion end and the receiving groove;
An intake type smoke removal system as claimed in claim 7 . a water pump for recycling water discharged through the mixing conduit;
An intake type smoke removal system according to claim 4.