BOG gas recycling integrated device for liquefied natural gas tank car

Abstract

The utility model relates to the technical field of BOG gas recovery, and discloses a liquefied natural gas tank car BOG gas recycling integrated device which comprises a tank body, a first natural gas storage tank is arranged on the upper portion of the front side in the tank body, a first electromagnetic valve is arranged on the right side of the first natural gas storage tank, and the right end of the first electromagnetic valve is fixedly connected with a connecting pipe. A compressor is fixedly connected to one end of the connecting pipe, a gas conveying pipe is fixedly connected to the rear side of the upper portion of the compressor, a cooler is fixedly connected to one end of the gas conveying pipe, cooling fins are arranged in the cooler, and a conveying pipe is fixedly connected to the left side of the outer portion of the cooler. According to the BOG gas storage and utilization device, the BOG gas can be stored and utilized more conveniently, unnecessary resource waste and environmental pollution caused by the fact that the BOG gas is directly discharged into the atmosphere are avoided, purer liquid is obtained, and the subsequent utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of BOG gas recovery, in particular to an integrated device for recovering and utilizing BOG gas from a liquefied natural gas tank truck. Background Art

[0002] Liquefied natural gas (LNG) tank trucks produce a lot of waste gas during transportation and storage, including BOG (Boil-Off Gas). In order to minimize energy waste and environmental pollution, an integrated device for recovering and utilizing BOG gas from LNG tank trucks was designed.

[0003] The existing BOG gas recovery and utilization integrated device for liquefied natural gas tank trucks is difficult to manufacture, has low recovery efficiency and high cost, and general small manufacturers cannot afford it. If the BOG gas is directly discharged into the atmosphere, it will cause unnecessary waste of resources and environmental pollution. Therefore, those skilled in the art provide an integrated device for BOG gas recovery and utilization for liquefied natural gas tank trucks to solve the problems raised in the above background technology. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides an integrated device for recovering and utilizing BOG gas from a liquefied natural gas tank truck, aiming to improve the problem in the prior art that if BOG gas is directly discharged into the atmosphere, it will cause unnecessary waste of resources and environmental pollution.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an integrated device for recovering and utilizing BOG gas from a liquefied natural gas tank truck, comprising a tank body, a natural gas storage tank 1 being arranged on the upper front side of the interior of the tank body, a first solenoid valve being arranged on the right side of the natural gas storage tank 1, a connecting pipe being fixedly connected to the right end of the first solenoid valve, a compressor being fixedly connected to a gas delivery pipe being fixedly connected to the upper rear side of the compressor, a cooler being fixedly connected to one end of the gas delivery pipe, a cooling fin being arranged inside the cooler, a delivery pipe being fixedly connected to the outer left side of the cooler, a second solenoid valve being fixedly connected to one end of the delivery pipe, a collecting tank being arranged on the left side of the second solenoid valve, and a gas storage assembly being fixedly connected to the rear side of the natural gas storage tank 1.

[0006] As a further description of the above technical solution:

[0007] The gas storage assembly includes a second natural gas storage tank, which is fixedly connected to the rear side of the first natural gas storage tank. The bottom of the second natural gas storage tank is fixedly connected to a third natural gas storage tank, which is fixedly connected to the inner bottom side of the tank body.

[0008] As a further description of the above technical solution:

[0009] A filter screen is fixedly connected to the left side of the bottom of the inner wall of the cooler, a filter layer is arranged inside the filter screen, an activated carbon plate is arranged inside the filter layer, and a filter element is arranged inside the activated carbon plate.

[0010] As a further description of the above technical solution:

[0011] The right end of the natural gas storage tank 2 is fixedly connected with a circulation pipe, one end of which is fixedly connected to the interior of the natural gas storage tank 3, and the front side of the circulation pipe is fixedly connected with a branch pipe, one end of which is fixedly connected to the interior of the natural gas storage tank 1.

[0012] As a further description of the above technical solution:

[0013] The bottom of the tank body is fixedly connected with a support frame, and the bottom of the support frame is fixedly connected with a tank truck body.

[0014] As a further description of the above technical solution:

[0015] The bottom of the tank car body is rotatably connected to wheels on both the left and right sides and the front and back sides. The bottom of the tank car body is fixedly connected to a fixing frame, and the upper part of the fixing frame is fixedly connected to a support rod, and the support rod is fixedly connected to the bottom of the tank body.

[0016] As a further description of the above technical solution:

[0017] The upper part of the tank body is fixedly connected with a liquid injection port, and the left side of the tank body is fixedly connected with an operation box.

[0018] As a further description of the above technical solution:

[0019] The collecting tank is fixedly connected to the bottom of the first natural gas storage tank.

[0020] The utility model has the following beneficial effects:

[0021] 1. In the utility model, by using the circulation pipe, branch pipe, natural gas storage tank 1, first solenoid valve, connecting pipe, compressor, gas transmission pipe, cooler, cooling plate and other structures in coordination, BOG gas can be stored and utilized more conveniently, and BOG gas can be avoided from being directly discharged into the atmosphere, resulting in unnecessary waste of resources and environmental pollution.

[0022] 2. In the utility model, by using the filter screen, filter layer, activated carbon plate, filter element and other structures in coordination, a purer liquid can be obtained, thereby improving the subsequent utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a three-dimensional diagram of an integrated device for recovering and utilizing BOG gas from a liquefied natural gas tank truck proposed by the utility model;

[0024] Figure 2 This is a cross-sectional view of the tank body of a liquefied natural gas tank truck BOG gas recovery and utilization integrated device proposed by the utility model;

[0025] Figure 3 This is a cross-sectional view of a cooler of a liquefied natural gas tank truck BOG gas recovery and utilization integrated device proposed by the utility model;

[0026] Figure 4 for Figure 3 Enlarged view of point A.

[0027] Legend:

[0028] 1. Tank truck body; 2. Wheels; 3. Support frame; 4. Support rod; 5. Fixed frame; 6. Liquid filling port; 7. Tank body; 8. Operation box; 9. Natural gas storage tank one; 10. Collecting tank; 11. Circulation pipe; 12. Branch pipe; 13. Cooler; 14. Gas pipeline; 15. Compressor; 16. First solenoid valve; 17. Connecting pipe; 18. Second solenoid valve; 19. Delivery pipe; 20. Cooling plate; 21. Filter screen; 22. Filter layer; 23. Activated carbon plate; 24. Filter element; 25. Natural gas storage tank two; 26. Natural gas storage tank three. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Reference Figure 1-Figure 3The utility model provides an embodiment: an integrated device for recycling BOG gas of a liquefied natural gas tank truck, comprising a tank body 7, a natural gas storage tank 9 is arranged on the upper front side of the tank body 7, a first solenoid valve 16 is arranged on the right side of the natural gas storage tank 9, a connecting pipe 17 is fixedly connected to the right end of the first solenoid valve 16, a compressor 15 is fixedly connected to one end of the connecting pipe 17, a gas delivery pipe 14 is fixedly connected to the upper rear side of the compressor 15, a cooler 13 is fixedly connected to one end of the gas delivery pipe 14, a cooling fin 20 is arranged inside the cooler 13, a delivery pipe 19 is fixedly connected to the left side of the outside of the cooler 13, a second solenoid valve 18 is fixedly connected to one end of the delivery pipe 19, a collecting tank 10 is arranged on the left side of the second solenoid valve 18, a gas storage assembly is fixedly connected to the rear side of the natural gas storage tank 9, and the collecting tank 10 is fixedly connected to the bottom of the natural gas storage tank 9;

[0031] The gas storage assembly includes a natural gas storage tank 25, which is fixedly connected to the rear side of the natural gas storage tank 1 9, and a natural gas storage tank 3 26 is fixedly connected to the bottom of the natural gas storage tank 25, and the natural gas storage tank 3 26 is fixedly connected to the inner bottom side of the tank body 7, and a flow pipe 11 is fixedly connected to the right end of the natural gas storage tank 25, and one end of the flow pipe 11 is fixedly connected to the interior of the natural gas storage tank 3 26, and a branch pipe 12 is fixedly connected to the front side of the flow pipe 11, and one end of the branch pipe 12 is fixedly connected to the interior of the natural gas storage tank 1 9.

[0032] The BOG gas generated by the natural gas storage tank three 26, the natural gas storage tank two 25 and the natural gas storage tank one 9 is transported through the circulation pipe 11 and the branch pipe 12, the first solenoid valve 16 is opened, the BOG gas enters the first solenoid valve 16 from the natural gas storage tank, enters the compressor 15 through the connecting pipe 17 to compress the BOG gas, and the compressed BOG gas enters the cooler 13 through the gas transmission pipe 14, and is condensed into liquid by the cooling plate 20. When it is needed later, the liquid is reliquefied and gasified for subsequent use, and the second solenoid valve 18 is opened, so that the condensed liquid enters the collection tank 10 through the transmission pipe 19 for storage.

[0033] Reference Figure 3 and Figure 4 A filter screen 21 is fixedly connected to the left side of the bottom inner wall of the cooler 13 , a filter layer 22 is arranged inside the filter screen 21 , an activated carbon plate 23 is arranged inside the filter layer 22 , and a filter element 24 is arranged inside the activated carbon plate 23 .

[0034] The odor and impurities in the liquid are filtered and removed through the filter screen 21, the filter layer 22, the activated carbon plate 23 and the filter element 24.

[0035] Reference Figure 1The bottom of the tank body 7 is fixedly connected to a support frame 3, the bottom of the support frame 3 is fixedly connected to a tank truck body 1, the bottom of the tank truck body 1 is rotatably connected to wheels 2 on both the left and right front and back sides, the bottom of the tank truck body 1 is fixedly connected to a fixing frame 5, the upper part of the fixing frame 5 is fixedly connected to a support rod 4, the support rod 4 is fixedly connected to the bottom of the tank body 7, the upper part of the tank body 7 is fixedly connected to a liquid filling port 6, and the left side of the tank body 7 is fixedly connected to an operation box 8.

[0036] The tank truck body 1 is started to transport liquefied natural gas via the wheels 2, the tank body 7 is fixedly supported via the support rods 4 and the fixing frame 5, and the three natural gas storage tanks are connected via the internal pipeline of the liquid injection port 6 to inject liquefied natural gas into the natural gas storage tanks; when an emergency occurs, emergency measures are taken via the operation box 8.

[0037] Working principle: When the device is needed, the BOG gas generated by the natural gas storage tank 25 and the natural gas storage tank 3 26 during the transportation of liquefied natural gas passes through the circulation pipe 11 and the branch pipe 12 to the interior of the natural gas storage tank 1 9. An emulated countercurrent component is provided between the natural gas storage tank and the connecting pipe. When shaking occurs during transportation, the liquefied natural gas will not flow back, and enter the interior of the compressor 15 through the first solenoid valve 16 and the connecting pipe 17. The BOG gas is compressed by the compressor 15 and enters the interior of the cooler 13 through the gas transmission pipe 14. The BOG gas is condensed into liquid by the cooling plate 20, so that the BOG gas can be stored and utilized more conveniently, and the direct discharge of the BOG gas into the atmosphere is avoided, resulting in unnecessary waste of resources and environmental pollution. After the BOG gas is condensed into liquid, the odor and impurities contained in the liquid are removed through the filter 21, the filter layer 22, the activated carbon plate 23 and the filter element 24, so that a purer liquid is obtained, and the subsequent utilization efficiency is improved.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An integrated device for recovering and utilizing BOG gas from a liquefied natural gas tanker, comprising a tank body (7), characterized in that: A natural gas storage tank (9) is arranged at the upper front part of the interior of the tank body (7), a first solenoid valve (16) is arranged on the right side of the natural gas storage tank (9), a connecting pipe (17) is fixedly connected to the right end of the first solenoid valve (16), one end of the connecting pipe (17) is fixedly connected to a compressor (15), a gas delivery pipe (14) is fixedly connected to the upper rear side of the compressor (15), one end of the gas delivery pipe (14) is fixedly connected to a cooler (13), a cooling fin (20) is arranged inside the cooler (13), a delivery pipe (19) is fixedly connected to the left side of the exterior of the cooler (13), one end of the delivery pipe (19) is fixedly connected to a second solenoid valve (18), a collecting tank (10) is arranged on the left side of the second solenoid valve (18), and a gas storage assembly is fixedly connected to the rear side of the natural gas storage tank (9).

2. The liquefied natural gas tank truck BOG gas recovery and utilization integrated device according to claim 1, characterized in that: The gas storage assembly comprises a second natural gas storage tank (25), which is fixedly connected to the rear side of the first natural gas storage tank (9), and a third natural gas storage tank (26) is fixedly connected to the bottom of the second natural gas storage tank (25), and the third natural gas storage tank (26) is fixedly connected to the inner bottom side of the tank body (7).

3. The liquefied natural gas tank truck BOG gas recovery and utilization integrated device according to claim 1, characterized in that: A filter screen (21) is fixedly connected to the left side of the bottom of the inner wall of the cooler (13), a filter layer (22) is arranged inside the filter screen (21), an activated carbon plate (23) is arranged inside the filter layer (22), and a filter element (24) is arranged inside the activated carbon plate (23).

4. The liquefied natural gas tank truck BOG gas recovery and utilization integrated device according to claim 2, characterized in that: The right end of the second natural gas storage tank (25) is fixedly connected to a circulation pipe (11), one end of which is fixedly connected to the interior of the third natural gas storage tank (26), and the front side of the circulation pipe (11) is fixedly connected to a branch pipe (12), one end of which is fixedly connected to the interior of the first natural gas storage tank (9).

5. The liquefied natural gas tank truck BOG gas recovery and utilization integrated device according to claim 1, characterized in that: The bottom of the tank body (7) is fixedly connected to a support frame (3), and the bottom of the support frame (3) is fixedly connected to a tank truck body (1).

6. The liquefied natural gas tank truck BOG gas recovery and utilization integrated device according to claim 5, characterized in that: The bottom of the tank truck body (1) is rotatably connected to wheels (2) on both the left and right sides and the front and rear sides. The bottom of the tank truck body (1) is fixedly connected to a fixing frame (5). The upper part of the fixing frame (5) is fixedly connected to a support rod (4). The support rod (4) is fixedly connected to the bottom of the tank body (7).

7. The liquefied natural gas tank truck BOG gas recovery and utilization integrated device according to claim 1, characterized in that: The upper part of the tank body (7) is fixedly connected with a liquid injection port (6), and the left side of the tank body (7) is fixedly connected with an operating box (8).

8. The integrated device for recovering and utilizing BOG gas from a liquefied natural gas tanker according to claim 1, characterized in that: The collecting tank (10) is fixedly connected to the bottom of the natural gas storage tank (9).

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