Residual gas recovery device for liquid carbon dioxide filling pipeline

Abstract

The utility model discloses a liquid carbon dioxide filling pipeline residual gas recovery device which comprises a carbon dioxide finished product tank, a gas phase pipeline is arranged on the upper portion of the carbon dioxide finished product tank, a liquid phase pipeline is arranged on the lower portion of the carbon dioxide finished product tank, a first valve and a third valve are arranged on the gas phase pipeline, and an outlet of the third valve is connected with a carbon dioxide tank car. The liquid phase pipeline is provided with a fourth valve, an outlet of the fourth valve is connected with a filling pump, the downstream of the filling pump is provided with a sixth valve, an outlet of the sixth valve is provided with a first pipeline and a second pipeline, the first pipeline is provided with a fifth valve, and an outlet of the fifth valve is connected with a carbon dioxide tank car; a seventh valve, a booster pump, a return tank and an eighth valve are arranged on the second pipeline, and an outlet of the eighth valve is connected with the carbon dioxide tank car. The residual gas recovery device for the liquid carbon dioxide filling pipeline effectively recovers residual gas, so that gas emission is reduced, and the environment is protected; and waste after filling is reduced, benefits are improved, and practicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carbon dioxide's equipment of filling, more exactly, it is a liquid carbon dioxide filling pipeline waste gas recovery device. BACKGROUND

[0002] In the existing carbon dioxide filling system, the main components are carbon dioxide storage tank, filling pump, gas-liquid balance pipeline and cut-off valve. Its main principle is to use the filling pump to pressurize, and then fill the carbon dioxide into the tank car through the pipeline. After each filling, the residual gas in the pipeline between the filling pump and the tank car cannot return to the carbon dioxide storage tank due to the presence of the check valve on the filling pump. This part of liquid gas is treated by venting, which causes great waste of gas. If venting is not performed, the liquid gas will be gasified after the temperature rises, and the volume will expand rapidly. At this time, the pressure in the pipeline will rise sharply, causing a safety accident. SUMMARY

[0003] Therefore, it is necessary to provide a liquid carbon dioxide filling pipeline waste gas recovery device to solve the above technical problems.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A liquid carbon dioxide filling pipeline waste gas recovery device, characterized in that the liquid carbon dioxide filling pipeline waste gas recovery device comprises a carbon dioxide finished product tank, the upper part of the carbon dioxide finished product tank is provided with a gas phase pipeline, the lower part of the carbon dioxide finished product tank is provided with a liquid phase pipeline,

[0006] The gas phase pipeline is provided with a first valve and a third valve, the outlet of the third valve is connected to a carbon dioxide tank car,

[0007] The liquid phase pipeline is provided with a fourth valve, the outlet of the fourth valve is connected to a filling pump, the downstream of the filling pump is provided with a sixth valve, the outlet of the sixth valve is provided with a first pipeline and a second pipeline, the first pipeline is provided with a fifth valve, the outlet of the fifth valve is connected to a carbon dioxide tank car, the second pipeline is provided with a seventh valve, a booster pump, a reflux tank and an eighth valve, the outlet of the eighth valve is connected to a carbon dioxide tank car.

[0008] As a preferred embodiment of the utility model, the first pipeline and the second pipeline are connected in parallel.

[0009] As a preferred embodiment of the utility model, a gas phase balance valve is arranged between the outlet of the first valve and the outlet of the fourth valve.

[0010] In a preferred embodiment of this utility model, a sampling valve is provided between the filling pump and the sixth valve.

[0011] In a preferred embodiment of this utility model, the carbon dioxide finished product tank is a spherical tank.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model provides a residual gas recovery device for liquid carbon dioxide filling pipelines. This device effectively recovers the remaining gas, thereby reducing gas emissions and protecting the environment; it also reduces waste after filling, improves efficiency, and is highly practical. Attached Figure Description

[0014] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the liquid carbon dioxide filling pipeline residual gas recovery device of this utility model;

[0016] The markings in the diagram are explained as follows: 1. Carbon dioxide finished product tank; 2. Filling pump; 3. Sixth valve; 4. Seventh valve; 5. Booster pump; 6. Return tank; 7. Second pipeline; 8. Eighth valve; 9. First pipeline; K1. Gas phase pipeline; K2. Liquid phase pipeline; S1. First valve; S2. Gas phase balance valve; S3. Third valve; S4. Fourth valve; S5. Fifth valve. Detailed Implementation

[0017] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0018] like Figure 1 As shown, the liquid carbon dioxide filling pipeline residual gas recovery device includes a carbon dioxide finished product tank 1, a gas phase pipeline K1 is provided at the upper part of the carbon dioxide finished product tank 1, and a liquid phase pipeline K2 is provided at the lower part of the carbon dioxide finished product tank 1.

[0019] The gas phase pipeline K1 is equipped with a first valve S1 and a third valve S3. The outlet of the third valve S3 is connected to a carbon dioxide tanker truck M.

[0020] The liquid phase pipeline K2 is equipped with a fourth valve S4. A gas phase balance valve S2 is located between the outlet of the first valve S1 and the outlet of the fourth valve S4. A filling pump 2 is connected to the outlet of the fourth valve S4. A sixth valve 3 is located downstream of the filling pump 2. A first pipeline 9 and a second pipeline 7 are located at the outlet of the sixth valve 3. The first pipeline 9 and the second pipeline 7 are connected in parallel. A fifth valve S5 is located on the first pipeline 9. The outlet of the fifth valve S5 is connected to a carbon dioxide tanker truck M. A seventh valve 4, a booster pump 5, a reflux tank 6, and an eighth valve 8 are located on the second pipeline 7. The outlet of the eighth valve 8 is connected to the carbon dioxide tanker truck M.

[0021] The working principle of the residual gas recovery device for the liquid carbon dioxide filling pipeline is explained below.

[0022] After the carbon dioxide filling is completed, valves S3 and S5 are shut off, thus disconnecting the gas phase pipeline K1 and the liquid phase pipeline K2. Booster pump 5 is then started, pressurizing the excess liquid carbon dioxide in the liquid phase pipeline K2 into the carbon dioxide tank truck M, effectively reducing the loss of filling gas. Finally, the vent valve is opened to release the gaseous carbon dioxide, reducing the emission of liquid carbon dioxide.

[0023] This liquid carbon dioxide filling pipeline residual gas recovery device effectively recovers the remaining gas, thereby reducing gas emissions and protecting the environment; it also reduces waste after filling, improves efficiency, and is highly practical.

[0024] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application.

Claims

1. A residual gas recovery device for liquid carbon dioxide filling pipelines, characterized in that, The liquid carbon dioxide filling pipeline residual gas recovery device includes a carbon dioxide finished product tank (1), the upper part of which is provided with a gas phase pipeline (K1), and the lower part of which is provided with a liquid phase pipeline (K2). The gas phase pipeline (K1) is equipped with a first valve (S1) and a third valve (S3), and the outlet of the third valve (S3) is connected to a carbon dioxide tanker truck (M). The liquid phase pipeline (K2) is equipped with a fourth valve (S4), and a filling pump (2) is connected to the outlet of the fourth valve (S4). A sixth valve (3) is provided downstream of the filling pump (2). A first pipeline (9) and a second pipeline (7) are provided at the outlet of the sixth valve (3). A fifth valve (S5) is provided on the first pipeline (9), and the outlet of the fifth valve (S5) is connected to a carbon dioxide tanker truck. A seventh valve (4), a booster pump (5), a reflux tank (6), and an eighth valve (8) are provided on the second pipeline (7). The outlet of the eighth valve (8) is connected to a carbon dioxide tanker truck.

2. The residual gas recovery device for liquid carbon dioxide filling pipelines according to claim 1, characterized in that, The first pipe (9) and the second pipe (7) are connected in parallel.

3. The residual gas recovery device for liquid carbon dioxide filling pipelines according to claim 1, characterized in that, A gas phase balancing valve (S2) is provided between the outlet of the first valve (S1) and the outlet of the fourth valve (S4).

4. The residual gas recovery device for liquid carbon dioxide filling pipelines according to claim 1, characterized in that, A sampling valve (P) is provided between the filling pump (2) and the sixth valve (3).

5. The residual gas recovery device for liquid carbon dioxide filling pipelines according to claim 1, characterized in that, The carbon dioxide finished product tank (1) is a spherical tank.

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