JPH044002B2 - - Google Patents

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a marine sludge dewatering device for removing moisture from sludge discharged from a heavy oil purification device in a ship, and particularly relates to a marine sludge dewatering device for removing moisture from sludge discharged from a heavy oil purifying device in a ship, and in particular, for combustion in an auxiliary boiler and for complete utilization. This invention relates to a dewatering device useful for possible new ships or conventional ships.

[Prior Art and its Problems] Generally, new ships are equipped with an incinerator that burns sludge discharged from a heavy oil purification system, and the sludge is burned through a nozzle. In this case, gasified fuel oil is ejected from the second nozzle to continuously burn the sludge. The energy from this combustion is not utilized at all.

If a ship is not equipped with a sludge treatment system, the treatment facility at the port may not be in place, or even if it does have a treatment facility, the cost is high, and furthermore, the capacity of the sludge tank may be small, causing problems during the voyage. Since it is not possible to retain all the sludge that is separated from the heavy oil used, it may be dumped into the sea during the voyage.

Therefore, the present invention provides a marine sludge dewatering device that dewaters sludge discharged from a heavy oil cleaning device into a stable oil and water emulsion with a moisture content of less than 2%, and meets the requirements for environmental assistance. The purpose is to

[Means, operations and effects for solving the problems] A marine sludge dewatering device according to the present invention includes a clarification tank which is provided with a steam heating coil and which is connected from a sludge pump to a sludge tank via a pipe, Dehydrated fuel is stored inside. The clarification tank further has a control unit consisting of a gate valve, a funnel and a drain valve. The clarifier tank is connected via valves, pipes and a fuel pump to an evaporator vessel, which is connected to a condenser. This condenser is connected to the condensate container via an overflow pipe. The bottom of this condensate vessel is connected to a collection tank, the top to the suction side of an ejector, and the outlet side of this ejector to a condenser.

Further, in an embodiment of the invention, the evaporation vessel includes a housing having a cover. A heating coil is mounted within the housing, and a toroid member having a number of holes formed in the bottom is mounted on the heating coil. A dehumidifier consisting of a grid and metal chips is also placed inside the cover.

In yet other embodiments, a capacitor includes a housing having a cover. This housing is fitted with a diaphragm with a number of holes in its bottom and an overflow pipe. A cooling coil is arranged below this diaphragm.

According to the marine sludge dewatering device according to the present invention,
The combustibles separated from the fuel oil can be used without introducing moisture into the furnace of the boiler, and environmental conservation or protection can be achieved.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[Embodiment] A marine sludge dewatering apparatus according to an embodiment of the present invention includes a clarification tank 1 provided with a steam heating coil 2, and the clarification tank 1 is connected to a sludge tank ST via a sludge pump SP. Furthermore,
Gate valves 3, 4 and a funnel 5 are provided for checking the presence or absence of water in the liquid sent into the clarification tank 1, and a drain valve 6 is also provided at the bottom. This clarification tank is connected to an evaporation vessel 8 via valves, pipes and a fuel pump 7. This external connection allows fuel to be transferred from the clearing tank 1 via the pump 7 to the upper part of the evaporation vessel 8,
Further, the fuel can be circulated from the bottom of the evaporation vessel 8 to the inlet at the top thereof, and further transferred from the bottom of the evaporation vessel 8 to the boiler fuel service tank WTBF.

Housing 1 with cover 14 of evaporation vessel 8
A heating coil 9 is mounted inside the heating coil 8, and above the heating coil 9, a toroidal member 17 having a plurality of holes in the bottom is arranged. A dehumidifier consisting of a mesh member or grid 16 and a metal chip 15 is provided within the cover 14 of the evaporation vessel 8. The evaporation vessel 8 is connected via a pipe to a condenser 10 so that steam can be discharged through a cover 14 of the evaporation vessel 8 .

Capacitor 10 includes a housing 20 with a cover 19. A diaphragm 22 and an overflow pipe 23 are attached to the housing 20, the bottom of which is provided with a number of holes. A cooling coil 21 is disposed below this diaphragm. This condenser 10 is further connected to a discharge line to the subsea OS. A condensate container 11 designed as a common housing is arranged below the condenser 10 and is connected to the condenser 10 via a discharge line 23 . The top of this condenser is connected to the suction side of the ejector 12 and the bottom to a desinfestation tank DT. The ejector 12 is connected to a subsea pump 13, and the seawater after leaving the ejector 12 acts as cooling water.

Each of the above-mentioned components is mounted on a common frame except for the clear water tank 1 which is formed integrally with the ship's hull and the seawater pump 13 which is disposed below the water line of the ship.

The operation of this device consists of a temperature controller attached to the heating coil 2 of the clarification tank 1, a remote control valve, a level detector in the evaporator vessel 8 and the condensate vessel 11, and a pressure-side line in the fuel pump 7. This is done automatically using a fuel moisture detector installed in the fuel tank.

The operation of this dehydrator is as follows.

Initially, the sludge pump sucks water from the sludge tank and discharges it through the gate valve 3 into the collection tank. The funnel 5 of the gate valve 4 is for checking. When the fuel starts to flow into the funnel 5, close the gate valve 4 and put it into the clarifying tank 1.
For example, it takes 10 to 12 hours in this clear tank 1.
Heat to 80℃. The separated water is discharged from the drain valve 6.

When the seawater pump 13 is started, the ejector 12
creates a 90-95% vacuum. Hot water, which is cooling water for the ship's main engine or auxiliary engine, flows through the heating coil 9.

When the fuel pump 7 is started, it draws suction from the clarifier tank 1 and sprinkles fuel in the form of an emulsion onto the heating coil 9 via the toroid member 17.

After the evaporator vessel 8 is filled, when the remote control valve is switched, the pump 7 sucks fuel from the bottom of the evaporator vessel 8 and sends it to the toroid member 17, where it is dehydrated to the desired water content.

The water and fuel vapors are cleaned from the water droplets captured by the demister and enter the condenser 10. In the condenser 10, condensation occurs primarily on the vertical walls of the cooling jacket, and a portion is condensed on the vertical walls of the multi-hole diaphragm 22. The uncondensed vapor is blown out through the holes in the diaphragm 22 into the condensate container. The condensate vessel is maintained well below the condensation temperature of the fuel vapor at a given pressure. Therefore, fuel vapor does not flow into the working fluid of the ejector 12. The condensate flows into the condensate container 11 via the overflow pipe 23.

After the fuel has been dehydrated, the vacuum in this vessel is removed and the fuel pump pumps it from the bottom of the evaporation tank into the service tank for boiler fuel. The condensate in the condensate container 11 is transferred by gravity into a collection tank. In this way, water is dehydrated in batches at predetermined intervals until the clearing tank 1 is empty.

[Brief explanation of drawings]

FIG. 1 is a schematic piping diagram of one embodiment of the present invention;
Figure 2 is a longitudinal cross-sectional view of the evaporator vessel, Figure 3 is a cross-sectional view of the condenser and condensate vessel, Figure 4 is a cross-sectional view taken along line A-A in Figure 2, and Figure 5 is a longitudinal cross-section of the condenser. It is a directional cross-sectional view. 1... Clearing tank, 2, 21... Heating coil,
3, 4...gate valve, 5...funnel, 6...
Drain valve, 7...fuel pump, 8...evaporation container,
10... Condenser, 11... Condensate container, 12
...Ejiekta, 13...Seawater pump, 17...
Toroid member, 18, 20...Housing, 22
...Diaphragm, 23...Overflow pipe.

Claims (1)

[Claims] 1. A clarification tank 1 provided with a steam heating coil 2, connected to a sludge tank via a sludge pump, and having a control unit consisting of gate valves 3, 4, a funnel 5, and a drain valve 6, This clarification tank 1 is further connected via valves, pipes and a fuel pump 7 to an evaporation vessel 8, which is connected to a condenser 10, which condenser 10
is connected to the condensate container 1 via the overflow pipe 23.
1, the bottom of this condensate container 11 is connected to a collection tank, the top is connected to the suction side of an ejector 12, the outlet side of this ejector is connected to a condenser 10, and the condensate container 11 is connected to a condenser 10 to be discharged from a heavy oil purification system in a ship. A marine sludge dewatering device characterized by being capable of dewatering sludge. 2. The evaporation vessel 8 includes a housing 18 having a cover 14, a heating coil 9 is installed in the housing 18, a toroid member 17 having a number of holes formed at the bottom is installed on the heating coil, and the cover 2. The marine sludge dewatering apparatus according to claim 1, wherein a dehumidifier comprising a grid 16 and metal chips 15 is disposed within the sludge dehydrator. 3. The capacitor 10 includes a housing 20 having a cover 19. A diaphragm 2 with a number of holes at the bottom and an overflow pipe 23 are attached to the housing 20, and a cooling coil 21 is installed below the diaphragm 22. A marine sludge dewatering device according to claim 1, wherein the marine sludge dewatering device is arranged as set forth in claim 1.