Shipborne oil residue dehydration device and oil residue dehydration method

Abstract

The present invention relates to a ship-borne oil residue dehydration device, comprising a body of the dehydration device in the shape of a closed container, a vent is provided at the upper part of the body, an oil residue water inlet and an overflow are provided on the side wall, and the overflow is lower than the oil residue water inlet; a heating coil is provided in the body, and the heating coil has a heating medium inlet and a heating medium outlet; an oil and gas condensation net is provided at the upper part of the body, and the longitudinal section of the oil and gas condensation net is a parallelogram, so that: the oil and gas condensation net has two pairs of oppositely arranged planes, and the oppositely arranged planes are parallel to each other; the bottom of the body is connected with the oil residue tank, and the overflow and the oil residue water inlet are respectively connected with the oil residue tank, and a fluid circulation is formed under the action of a power mechanism. Compared with the existing ship-borne oil residue dehydration equipment, the present invention has a simple structure, low cost, and low initial investment; it is easy to install; the dehydration effect is thorough; compared with the oil residue separator, it does not need to consume electricity and fresh water, and the required storage space is small, saving the storage space on the ship.

Description

Technical Field

[0001] The invention relates to a ship oil residue dehydration device and an oil residue dehydration method, belonging to the technical field of oil residue dehydration. Background Art

[0002] The treatment of oil residue water on existing ships is generally through combustion in incinerators or recovery by discharge to shore after the ship docks. Both methods will increase the operating costs of shipping companies: combustion through incinerators requires additional consumption of diesel and electricity; recovery by discharge to shore requires higher recovery fees. Oil residue water mainly comes from the discharge of oil separators and oil-water separators. The moisture content in these oil residue waters is relatively high, especially the moisture content of the oil residue water discharged from the oil separator is as high as 50% or more. High moisture content is not conducive to the combustion of incinerators, and also causes companies to pay recovery fees for these waters according to oil residues.

[0003] At present, the existing technology has developed a special oil-residue separator, which is similar to the principle of the fuel oil separator. The separation plate is driven by an electric motor, and the high-speed centrifugal force is used to continuously separate the residue particles, oil and water in the oil residue according to different specific gravities. The residue, oil and water are discharged from different outlets. Although the oil-residue separator has high separation efficiency, it is expensive and the cost of use is also high. At the same time, the water needs to be further processed by the oil-water separator, and more storage space is needed for the residue, oil and water.

[0004] In summary, the existing technology mainly has the following deficiencies:

[0005] 1) If the ship itself does not do any treatment on the oil residue water, the shipping company needs to consume extra diesel and electricity or pay a high port recycling fee;

[0006] 2) If a ship-borne oil-slag separator is used, shipping companies need to invest huge amounts of money in purchasing equipment, and also consume electricity, fresh water, etc., and the storage space for oil-slag water is higher;

[0007] 3) The existing ship-borne oil residue separator does not fundamentally solve the moisture problem in the oil residue water, and further processing and storage are required. Summary of the invention

[0008] In view of the above-mentioned shortcomings, the purpose of the present invention is to provide a ship-borne oil residue dehydration device with a simple structure and low cost, which makes full use of the existing heat source on board (heating medium such as steam or hot oil or electricity) to directly evaporate and remove the moisture in the oil residue water, thereby reducing the moisture content in the oil residue and saving storage space on board.

[0009] The present invention adopts the following technical solutions:

[0010] A ship-borne oil residue dehydration device comprises a dehydration device body in the shape of a closed container, wherein an air vent 1 is provided at the upper portion of the body, and an oil residue water inlet 2 and an overflow port 3 are provided on the side wall, wherein the overflow port 3 is lower than the oil residue water inlet 2; a heating coil is provided in the body, wherein the heating coil has a heating medium inlet and a heating medium outlet; an oil and gas condensation net 11 is provided at the upper portion of the body, wherein the longitudinal section of the oil and gas condensation net 11 is a parallelogram, so that: the oil and gas condensation net 11 has two pairs of oppositely arranged planes, wherein the oppositely arranged planes are parallel to each other; the bottom of the body is connected to the oil residue tank, wherein the overflow port 3 and the oil residue water inlet are respectively connected to the oil residue tank, and a fluid circulation is formed under the action of a power mechanism.

[0011] Preferably, the body has an insulating coating layer; the body has a removable top plate 10, the air vent pipe on the removable top plate 10 passes upward through the chimney and ends in the open air, and a fireproof net 21 is provided at the end of the air vent pipe at the top of the chimney.

[0012] Preferably, the longitudinal section of the oil-gas condensation net 11 is rhombus-shaped, and two sides are fixed to the inner wall of the main body by fastening screws 12 , and the position of the fastening screws 12 is higher than the oil residue water inlet 2 .

[0013] Furthermore, a liquid collecting tray is fixedly provided at the lower part of the oil-gas condensation net 11, and the liquid collecting tray is used to temporarily collect the oil residue dropped from the oil-gas condensation net 11, and overflow to the surroundings when the oil residue is collected to a designed degree.

[0014] Preferably, an impact-proof covering plate 13 is provided on the main body, and the oil residue water inlet 2 is extended and connected to the impact-proof covering plate 13 through a liquid inlet pipe 15 .

[0015] Preferably, at least two groups of heating coils are provided at different heights inside the main body.

[0016] Furthermore, two groups of heating coils are provided at different heights inside the main body, namely, a middle layer heating coil 16 and a bottom layer heating coil 17 .

[0017] Preferably, a U-shaped water seal 20 is provided on the pipeline extending from the overflow port 3; and a liquid level meter 19 is provided on the main body.

[0018] Preferably, the oil residue tank comprises a low-position oil residue tank and a high-position oil residue tank, the low-position oil residue tank adopts an oil residue pump as power and is connected to the oil residue water inlet, and the high-position oil residue tank adopts the dead weight of the oil residue as power and is connected to the oil residue water inlet.

[0019] A method for dehydrating oil residue on board a ship, using any one of the above-mentioned oil residue dehydration devices on board a ship, comprising the following steps:

[0020] S1, oil residue water enters the main body of the dehydration device through the liquid inlet pipe 15 of the oil residue water inlet 2, and the excess oil residue water returns to the oil residue tank through the overflow port 3;

[0021] S2. When a set amount of oily residue water is stored in the main body, the oily residue water is heated by the heating coil, and the evaporated water vapor contains a small amount of volatile oil gas, which passes through the two pairs of oppositely arranged planes of the oil gas condensation net to condense the oil gas.

[0022] Preferably, in step S2, after the oil vapor condenses, it gathers in the liquid collecting pan; when the oil in the liquid collecting pan is full, it will naturally overflow and fall back into the device body by gravity to be evaporated again by the heating coil.

[0023] Preferably, step S3 is also included: as the water evaporates continuously, the liquid level drops, and when it is lower than the middle layer heating coil, the heating medium of the middle layer heating coil is shut off, and only the bottom layer heating coil is used; when the liquid level drops to about 30% of the tank capacity as observed by the liquid level gauge, the heating is stopped; after standing for a short set time, the valve of the oil residue discharge port is opened to discharge the oil residue at the bottom into the oil residue tank.

[0024] Preferably, the oil residue dehydration device is fumigated before being not used for a long time to prevent the oil residue from condensing at the discharge port and causing blockage.

[0025] The beneficial effects of the present invention are:

[0026] 1) Compared with the existing ship-borne oil residue dehydration equipment, it has a simple structure and low cost;

[0027] 2) Compared with the existing ship-borne oil residue dehydration equipment, the initial investment is small;

[0028] 3) Easy to install;

[0029] 4) The dehydration effect is thorough;

[0030] 5) Compared with the oil residue separator, it does not consume electricity and fresh water, requires less storage space, and saves storage space on the ship.

[0031] 6) Make full use of the existing heat source on board (heating medium such as steam, hot oil or electricity) to directly evaporate and remove the water in the oil residue water, reduce the water content in the oil residue, reduce power consumption and save energy; use the steam generated by the exhaust gas of the main engine on board or heat the hot oil for dehydration treatment, and make full use of the waste heat of the exhaust gas, without additional consumption of diesel and electricity, and reduce the port recycling fee;

[0032] 7) Since the water is directly evaporated and discharged into the atmosphere, the water content in the oil residue is completely reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1It is a front view of the main part of the ship-borne oil residue dehydration device of the present invention.

[0034] Figure 2 It is a front perspective view of the main part of the ship-borne oil residue dehydration device of the present invention in a working state.

[0035] Figure 3 It is a schematic diagram of the overall structure of the ship-borne oil residue dehydration device of the present invention.

[0036] Figure 4 yes Figure 3 A partial enlarged view of .

[0037] In the figure, 1. air vent, 2. oil residue water inlet, 3. overflow port, 4. middle layer heating medium inlet, 5. middle layer heating medium outlet, 6. bottom layer heating medium inlet, 7. bottom layer heating medium outlet, 8. fumigation chamber inlet, 9. oil residue outlet, 10. removable top plate, 11. oil and gas condensation net, 12. fastening screws, 13. impact-proof covering plate, 14. cabinet with insulation coating, 15. liquid inlet pipe, 16. middle layer heating coil, 17. bottom layer heating coil, 18. fumigation chamber pipe, 19. liquid level gauge, 20. U-shaped water seal, 21. fireproof net, 22. low-level oil residue chamber, 23. high-level oil residue chamber, 24. chimney top, 25. oil residue pump. DETAILED DESCRIPTION

[0038] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] See also Figure 1-Figure 4 A ship-borne oil residue dehydration device comprises a body of the dehydration device in the shape of a closed container, an air vent 1 is arranged on the upper part of the body, and an oil residue water inlet 2 and an overflow port 3 are arranged on the side wall, and the overflow port 3 is lower than the oil residue water inlet 2; a heating coil is arranged in the body, and the heating coil has a heating medium inlet and a heating medium outlet; an oil and gas condensation net 11 is arranged in the upper part of the body, and the longitudinal section of the oil and gas condensation net 11 is a parallelogram, so that: the oil and gas condensation net 11 has two pairs of oppositely arranged planes, and the oppositely arranged planes are parallel to each other; the bottom of the body is connected with the oil residue tank, and the overflow port 3 and the oil residue water inlet are respectively connected with the oil residue tank, and a fluid circulation is formed under the action of a power mechanism.

[0040] See also Figure 1 The main body has a heat-insulating coating layer; the main body has a removable top plate 10, the air vent pipe on the removable top plate 10 passes upward through the chimney and ends in the open air, and a fireproof net 21 is provided at the end of the air vent pipe at the top of the chimney.

[0041] See also Figure 1-2The longitudinal section of the oil-gas condensation net 11 is rhombus-shaped, and both sides are fixed to the inner wall of the main body by fastening screws 12 , and the position of the fastening screws 12 is higher than the oil residue water inlet 2 .

[0042] Continue to see Figure 1-2 A liquid collecting tray is fixedly arranged at the lower part of the oil-gas condensation net 11, and the liquid collecting tray is used to temporarily collect the oil residue falling from the oil-gas condensation net 11, and overflow to the surroundings when the oil residue is collected to a designed degree.

[0043] Continue to see Figure 1-2 The main body is provided with an impact-proof covering plate 13, and the oil residue water inlet 2 is extended and connected to the anti-impact covering plate 13 through a liquid inlet pipe 15.

[0044] Continue to see Figure 1-2 The heating coils are provided with two groups at different heights inside the main body, namely, a middle layer heating coil 16 and a bottom layer heating coil 17.

[0045] See also Figure 3 A U-shaped water seal 20 is provided on the pipeline extending from the overflow port 3; and a liquid level gauge 19 is provided inside the main body.

[0046] See also Figure 3 The oil residue tank comprises a low-position oil residue tank 22 and a high-position oil residue tank 23. The low-position oil residue tank adopts an oil residue pump as power and is connected to the oil residue water inlet. The high-position oil residue tank adopts the dead weight of the oil residue as power and is connected to the oil residue water inlet.

[0047] When the oil residue dehydration device on board this ship is working, the following steps are included:

[0048] S1, oil residue water enters the main body of the dehydration device through the liquid inlet pipe 15 of the oil residue water inlet 2, and the excess oil residue water returns to the oil residue tank through the overflow port 3;

[0049] S2. When a set amount of oil residue water is stored in the main body, the oil residue water is heated by the heating coil. Since the evaporation temperatures of oil residue and water are different, the former is higher than the evaporation temperature of fuel oil (more than 135°C), while the evaporation temperature of water is only 100°C, and the temperature of the heating medium (steam or hot oil) in the heating coil is at least above 130°C, so the water evaporates first; the evaporated water vapor contains a small amount of volatile oil gas, which condenses the oil gas through the two pairs of oppositely arranged planes of the oil gas condensation network; after the oil gas condenses, it gathers in the liquid collection tray; when the oil in the liquid collection tray is full, it will overflow naturally, fall back into the inside of the device body by gravity, and be evaporated again by the heating coil.

[0050] S3: As the water evaporates continuously, the liquid level drops. When it is lower than the middle layer heating coil, the heating medium of the middle layer heating coil is turned off, and only the bottom layer heating coil is used; through the liquid level gauge, when the liquid level drops to about 30% of the tank capacity, the heating is stopped; after standing for a short period of time, the valve of the oil residue discharge port is opened to discharge the oil residue at the bottom into the oil residue tank. At this point, a complete liquid inlet dehydration process is completed.

[0051] In this embodiment, the oil residue dehydration device is fumigated before being not used for a long time to prevent the oil residue from condensing at the discharge port and causing blockage.

[0052] See also Figure 3 , the oil residue dehydration method is further described as follows: the oil residue dehydration method includes dehydration treatment of the oil residue tank and the low-level oil residue tank of the oil separator on the ship, and the evaporated water is directly discharged to the chimney top 24, and a fireproof net 21 is arranged at its outlet end to prevent the small amount of oil gas contained in the evaporated steam from causing danger. The oil residue in the oil residue tank of the oil separator can be transported to the oil residue dehydration device by gravity or through the oil residue pump on the ship. After dehydration treatment by the device, the oil residue is discharged to the low-level oil residue tank. The oil residue water overflowed from the dehydration device is directly discharged to the low-level oil residue tank. In addition to dehydrating the oil residue in the oil residue tank of the oil separator, the oil residue in the low-level oil residue tank can also be dehydrated for multiple times to further reduce the moisture content. In order to prevent the evaporated steam from entering the low-level oil residue tank through the overflow pipe, a U-shaped water seal 20 needs to be set on the overflow pipeline.

[0053] The key details of the present invention include:

[0054] 1) The setting of double-layer heating coil not only ensures the heating evaporation effect, but also increases the redundancy and flexibility of heating;

[0055] 2) The oil and gas condensation nets are set opposite to each other to improve the condensation effect of oil and gas;

[0056] 3) The top of the device adopts a removable top plate, and the removable top plate is slightly larger than the oil and gas condensation net, which is convenient for removing the oil and gas condensation net and taking it out for cleaning in the future;

[0057] 4) The oil and gas condensation net is fixed in the device by fastening screws, which is easy to disassemble;

[0058] 5) The liquid inlet and overflow port are both located below the oil and gas condensation net, which will not affect the disassembly and assembly of the oil and gas condensation net;

[0059] 6) A liquid collecting tray is arranged below the oil and gas condensation net to prevent the oil residue on the oil and gas condensation net from falling directly below, thereby improving the stability and continuity of oil and gas condensation and steam discharge;

[0060] 7) A U-shaped water seal is installed on the overflow pipe to prevent oil and gas from entering the oil residue tank;

[0061] 8) Evaporated water vapor is directly discharged from the top of the chimney, and a fireproof net is installed at the end;

[0062] 9) The oil residue tank of the oil separator and the low-level oil residue tank 22 can be dehydrated;

[0063] 10) It can enter the dehydration device by gravity or by oil residue pump.

[0064] The above are preferred embodiments of the present invention. A person skilled in the art may make various changes or improvements on this basis. Without departing from the general concept of the present invention, these changes or improvements should fall within the scope of protection claimed by the present invention.

Claims

1. A ship-borne oil residue dehydration device, characterized in that: The dehydration device comprises a body in the shape of a sealed container, wherein the upper part of the body is provided with a vent (1), and the side wall is provided with an oil residue water inlet (2) and an overflow port (3), wherein the overflow port (3) is lower than the oil residue water inlet (2); A heating coil is arranged in the body, and the heating coil has a heating medium inlet and a heating medium outlet; An oil-gas condensation net (11) is provided at the upper inner part of the body, and the longitudinal section of the oil-gas condensation net (11) is a parallelogram, so that: the oil-gas condensation net (11) has two pairs of oppositely arranged planes, and the oppositely arranged planes are parallel to each other; The oil residue tank comprises a low-position oil residue tank and a high-position oil residue tank, the bottom of the main body is connected to the low-position oil residue tank, the overflow port (3) is connected to the low-position oil residue tank, the oil residue water inlet (2) is connected to the low-position oil residue tank and the high-position oil residue tank respectively, and a fluid circulation is formed under the action of the power mechanism; the low-position oil residue tank adopts an oil residue pump as power and is connected to the oil residue water inlet, and the high-position oil residue tank adopts the dead weight of the oil residue as power and is connected to the oil residue water inlet; The longitudinal section of the oil-gas condensation net (11) is rhombus-shaped, and two sides are fixed to the inner wall of the body by fastening screws (12), and the position of the fastening screws (12) is higher than the oil residue water inlet (2); A liquid collecting tray is fixedly arranged at the lower part of the oil-gas condensation net (11), and the liquid collecting tray is used to temporarily collect the oil residue falling from the oil-gas condensation net (11), and overflow to the surroundings when the oil residue is collected to a designed degree; The main body is provided with an impact-proof covering plate (13), and the oil residue water inlet (2) is extended and connected to the impact-proof covering plate (13) through a liquid inlet pipe (15); The heating coils are provided in two groups at different heights inside the body, namely, a middle layer heating coil (16) and a bottom layer heating coil (17).

2. The shipborne oil residue dehydration device according to claim 1, characterized in that: The main body has a heat-insulating coating layer; the main body is provided with a removable top plate (10); the air vent pipe on the removable top plate (10) passes upward through the chimney and ends in the open air; a fireproof net (21) is provided at the end of the air vent pipe at the top of the chimney.

3. The shipborne oil residue dehydration device according to claim 1, characterized in that: A U-shaped water seal (20) is provided on the pipeline extending from the overflow port (3); and a liquid level meter (19) is provided on the main body.

4. A method for dehydrating oil residue on board a ship, using the oil residue dehydration device on board a ship according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1, the oil residue water enters the main body of the dehydration device through the liquid inlet pipe (15) of the oil residue water inlet (2), and the excess oil residue water returns to the low-level oil residue tank through the overflow port (3); S2. When a set amount of oily residue water is stored in the main body, the oily residue water is heated by the heating coil, and the evaporated water vapor contains a small amount of volatile oil gas, which passes through the two pairs of oppositely arranged planes of the oil gas condensation net to condense the oil gas.

5. The method for dehydrating oil residue on board a ship according to claim 4, characterized in that: In step S2, after the oil vapor condenses, it gathers in the liquid collecting pan; when the oil in the liquid collecting pan is full, it will overflow naturally and fall back into the device body by gravity, and be evaporated again by the heating coil.

6. The method for dehydrating oil residue on board a ship according to claim 4, characterized in that: The process also includes step S3: as the water evaporates continuously, the liquid level drops, and when it is lower than the middle layer heating coil, the heating medium of the middle layer heating coil is shut off, and only the bottom layer heating coil is used; when the liquid level drops to about 30% of the tank capacity as observed by the liquid level gauge, the heating is stopped; after standing for a short set time, the valve of the oil residue discharge port is opened to discharge the oil residue at the bottom into the low-level oil residue tank.

7. The method for dehydrating oil residue on board a ship according to claim 4, characterized in that: Before the oil residue dehydration device is not used for a long time, the cabin should be fumigated to prevent the oil residue from condensing at the discharge port and causing blockage.

Images