Carbon dioxide storage tank control pipeline

Abstract

The utility model relates to the field of carbon dioxide transportation, in particular to a carbon dioxide storage tank control pipeline. The utility model provides a carbon dioxide storage tank control pipeline which is characterized by comprising an emptying valve, a safety valve, a storage tank, an outlet valve, an inlet valve, a filling pump and a cooling pipeline, the storage tank is communicated with the filling pump through an inlet valve; the output end of the filling pump is connected with the outlet valve and the first end of the cooling pipeline. The second end of the cooling pipeline is connected with the storage tank. A gas phase outlet is formed in the storage tank and connected with the input end of the emptying valve. The carbon dioxide storage tank control pipeline provided by the utility model can be directly and simply transformed on the existing carbon dioxide storage tank control pipeline. According to the utility model, the carbon dioxide in the cooling pipeline always flows back to the storage tank, so that the carbon dioxide quickly flows back through the short-distance cooling pipeline after being output from the storage tank, and the icing phenomenon caused by large pressure difference is avoided.

Description

Technical Field

[0001] The utility model relates to the field of carbon dioxide transportation, in particular to a carbon dioxide storage tank control pipeline. Background Art

[0002] Refer to Figure 1 , the current carbon dioxide storage tank control pipeline includes: a vent valve 1, a safety valve 2, a storage tank 3, an outlet valve 4, an inlet valve 5, a filling pump 6, and a cooling valve 7. The storage tank 3 is connected to the filling pump 6 through the inlet valve 5. The output end of the filling pump 6 is connected to the vent valve 1 through a cooling pipeline, and the cooling pipeline is used to cool the motor of the filling pump 6; the output end of the filling pump 6 is also connected to the outlet valve 4; the cooling valve 7 is arranged on the cooling pipeline to control the on-off of the cooling pipeline, and the cooling valve 7 is located at the outlet of the filling pump 6; the safety valve 2 is arranged on the top of the storage tank 3. Thus, when the internal pressure of the storage tank 3 reaches the failure threshold, the safety valve 2 is opened to release the gas in the storage tank 3 until the pressure in the storage tank 3 is lower than the failure threshold and the safety valve 2 closes again.

[0003] When the filling pump 6 is working, the inlet valve 5 is opened. The liquid carbon dioxide in the storage tank 3 is divided into two paths through the filling pump 6. One path enters the container to be filled such as a tanker through the outlet valve 4, and the other path enters the cooling pipeline to ensure the working temperature of the filling pump 6 and the filling pump motor, and prevent the filling pump motor from being damaged due to high temperature; the carbon dioxide in the cooling pipeline absorbs heat and vaporizes and then flows back into the spherical tank 3. When the pressure of the spherical tank 3 exceeds the working pressure, the gaseous carbon dioxide in the upper part of the spherical tank 3 is discharged through the vent valve 1. When the storage tank 3 discharges carbon dioxide through the vent valve 1 to reduce the pressure, the carbon dioxide in the cooling pipeline no longer flows back into the spherical tank 3, but is discharged through the vent valve 1.

[0004] If the heat exchange of the carbon dioxide in the cooling pipeline is not sufficient, there is a coexistence phenomenon of gas and liquid, that is, it causes the liquid carbon dioxide to be discharged through the vent valve 1. The liquid carbon dioxide forms solid dry ice after decompression through the vent valve 1, blocking the pipeline, and the carbon dioxide in the storage tank 3 cannot be continuously discharged, resulting in overpressure of the spherical tank 3 and potential safety hazards.

[0005] Currently, in response to this situation, the industry adopts the method of heating the pipeline at the inlet end of the vent valve to promote the full vaporization of carbon dioxide before entering the vent valve 1, so as to avoid freezing and blocking. There are two ways of pipeline heating. One is to set a steam pipe on the pipeline, and the other is to set an electric heating wire on the pipeline. Both of these methods require adding additional equipment, increasing the complexity of the workshop environment, and treating the symptoms rather than the root cause. Summary of the Utility Model

[0006] To solve the defects of the existing anti-freezing methods for vent valves in the above-mentioned prior art, the present utility model proposes a control pipeline for a carbon dioxide storage tank, which can control the freezing risk caused by liquid carbon dioxide passing through the vent valve by simply modifying the pipeline connection method, and will not impose a burden on the installation environment.

[0007] A control pipeline for a carbon dioxide storage tank proposed by the present utility model is characterized in that it includes a vent valve, a safety valve, a storage tank, an outlet valve, an inlet valve, a filling pump, and a cooling pipeline; the storage tank is connected to the filling pump through the inlet valve; the output end of the filling pump is respectively connected to the outlet valve and the first end of the cooling pipeline, and the second end of the cooling pipeline is connected to the storage tank; a gas phase outlet is provided on the storage tank, and the gas phase outlet is connected to the input end of the vent valve.

[0008] Preferably, the vent valve is connected to a gas phase discharge pipe inserted into the storage tank, and the end of the gas phase discharge pipe inserted into the storage tank is the gas phase outlet, and the gas phase outlet is higher than the highest liquid level in the storage tank.

[0009] Preferably, a safety gas outlet is provided on the storage tank, and a safety valve is provided at the safety gas outlet.

[0010] Preferably, the gas phase outlet is the safety gas outlet.

[0011] Preferably, the safety gas outlet is arranged at the top of the storage tank.

[0012] Preferably, a cooling valve is provided on the cooling pipeline.

[0013] The advantages of the present utility model are as follows:

[0014] The control pipeline for a carbon dioxide storage tank proposed by the present utility model can be simply modified directly on the existing control pipeline for a carbon dioxide storage tank. In the present utility model, the carbon dioxide in the cooling pipeline always flows back to the storage tank, so that the carbon dioxide quickly flows back through a short cooling pipeline after being output from the storage tank, avoiding the icing phenomenon caused by a large pressure difference.

[0015] In the present utility model, through the circuit modification, the vent valve 1 only passes through the gas phase carbon dioxide, avoiding the freezing and blocking of the vent valve, ensuring the smooth discharge of the gas phase carbon dioxide in the storage tank, alleviating the overpressure phenomenon in the storage tank, and being beneficial to ensuring the safety of carbon dioxide storage and transportation in real time and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of an existing control pipeline for a carbon dioxide storage tank;

[0017] Figure 2 It is a schematic diagram of a modified control pipeline for a carbon dioxide storage tank;

[0018] Figure 3 It is a schematic diagram of another modified control pipeline for a carbon dioxide storage tank. Detailed implementation mode

[0019] Referring to Figure 2 , a carbon dioxide storage tank control pipeline proposed in this implementation mode disconnects the connection between the cooling pipeline and the vent valve 1 on the basis of the existing control pipeline shown in Figure 1 . In any case, the carbon dioxide in the cooling pipeline flows back to the storage tank 3; the pressure difference between the carbon dioxide in the cooling pipeline and the carbon dioxide in the storage tank 3 is small, which can avoid the freezing of the storage tank.

[0020] The storage tank 3 is provided with a gas phase outlet for discharging the internal gaseous carbon dioxide, and the gas phase outlet is connected to the vent valve 1. In this way, it is ensured that only gaseous carbon dioxide passes through the vent valve 1, avoiding the freezing and blocking of the vent valve 1, ensuring the smooth discharge of the gaseous carbon dioxide in the storage tank 3, and relieving the overpressure phenomenon.

[0021] During specific implementation, the gas phase outlet can directly adopt the safety gas outlet used to connect the safety valve on the storage tank 3. The safety gas outlet is arranged at the top of the storage tank 3, with a simple structure. The storage tank 3 does not need to be drilled additionally to realize the transformation of the carbon dioxide storage tank control pipeline.

[0022] In addition, the gas phase outlet can also be set as the port of the gas phase discharge pipe 8 inserted into the storage tank 3. The gas phase discharge pipe is connected to the vent valve 1. One end of the gas phase discharge pipe 8 inserted into the storage tank 3 is the gas phase outlet, and the gas phase outlet is higher than the highest liquid level in the storage tank 3. Specifically as shown in Figure 3 .

[0023] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A carbon dioxide storage tank control pipeline, characterized in that: The invention comprises a vent valve (1), a safety valve (2), a storage tank (3), an outlet valve (4), an inlet valve (5), a charging pump (6) and a cooling pipeline; the storage tank (3) is connected to the charging pump (6) via the inlet valve (5); the output end of the charging pump (6) is respectively connected to the outlet valve (4) and the first end of the cooling pipeline, and the second end of the cooling pipeline is connected to the storage tank (3); the storage tank (3) is provided with a gas phase outlet, and the gas phase outlet is connected to the input end of the vent valve (1).

2. The carbon dioxide storage tank control pipeline according to claim 1, characterized in that: The vent valve (1) is connected to a gas phase discharge pipe (8) inserted into the storage tank (3). One end of the gas phase discharge pipe (8) inserted into the storage tank (3) is the gas phase outlet. The gas phase outlet is higher than the highest liquid level in the storage tank (3).

3. The carbon dioxide storage tank control pipeline according to claim 1, characterized in that: The storage tank (3) is provided with a safety gas outlet, and a safety valve (2) is provided at the safety gas outlet.

4. The carbon dioxide storage tank control pipeline according to claim 3, characterized in that: The gas phase outlet is the safe outlet.

5. The carbon dioxide storage tank control pipeline according to claim 4, characterized in that: The safety air outlet is arranged at the top of the storage tank (3).

6. The carbon dioxide storage tank control pipeline according to claim 1, characterized in that: A cooling valve (7) is provided on the cooling pipeline.

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