Simple sampling device for liquid carbon dioxide

Abstract

A simple sampling device for liquid carbon dioxide comprises a storage tank and a buffer tank, the buffer tank is arranged on one side of the storage tank, a liquid inlet of the buffer tank is communicated with the storage tank through a liquid inlet pipeline, a liquid outlet of the buffer tank is communicated with a liquid outlet pipeline, and the other end of the liquid outlet pipeline is communicated with a sampling pipeline. A first valve is arranged on the liquid inlet pipeline, a second valve is arranged on the liquid outlet pipeline, and carbon dioxide in the buffer tank can be in a liquid state by controlling opening and closing of the first valve and the second valve. The buffer tank is additionally arranged on one side of the high-pressure storage tank, and the pressure in the buffer tank is controlled through the first valve and the second valve, so that dry ice can be prevented from being generated during sampling, the blocking risk is reduced, high-purity carbon dioxide gas can be taken out, and subsequent purity detection on the carbon dioxide gas is facilitated.

Description

Technical Field

[0001] This utility model relates to a sampling device, specifically, to a simple sampling device for liquid carbon dioxide. Background Technology

[0002] Carbon dioxide exists in different states (gaseous, liquid, solid) under different temperatures and pressures. The liquid carbon dioxide storage tank has a pressure of 2.0 MPa and a temperature of -25°C. Under these conditions, the carbon dioxide inside the tank is in a liquid state.

[0003] When sampling is performed through the bottom pipe of the storage tank, the pressure and temperature inside the pipe are the same as inside the tank, and the carbon dioxide is in a liquid state. When the sampling valve is opened, the sampling pipe outlet is at room temperature and pressure, and dry ice will appear at the pipe outlet, which can easily freeze and block the sampling port (when liquid carbon dioxide is released from a high-pressure environment to an atmospheric pressure environment (about 1 atmosphere), its pressure drops sharply. Since atmospheric pressure is much lower than the triple point pressure of carbon dioxide, liquid carbon dioxide cannot remain in a liquid state and will evaporate and cool rapidly. This rapid evaporation causes a sharp drop in the surrounding temperature, causing some carbon dioxide gas to recondense into a solid state, i.e., forming dry ice). Solid carbon dioxide easily blocks the sampling port, making sampling difficult and thus unable to detect the analytical indicators of liquid carbon dioxide in a timely manner. This is a shortcoming of the existing technology. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose a simple sampling device for liquid carbon dioxide.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a simple sampling device for liquid carbon dioxide, including a storage tank and a buffer tank. The buffer tank is arranged on one side of the storage tank. The inlet of the buffer tank is connected to the storage tank through an inlet pipe, and the outlet of the buffer tank is connected to an outlet pipe. The other end of the outlet pipe is connected to a sampling pipe. A first valve is provided on the inlet pipe, and a second valve is provided on the outlet pipe. By controlling the opening and closing of the first valve and the second valve, the carbon dioxide in the buffer tank can be kept in a liquid state.

[0006] A further improvement of this utility model is that the bottom of the buffer tank is provided with support legs.

[0007] A further improvement of this invention is that a pressure gauge is installed on the buffer tank.

[0008] A further improvement of this invention is that the storage tank is provided with an outlet, which is connected to a first pipe, and the first pipe is connected to an inlet pipe via a flange.

[0009] A further improvement of this utility model is that the first pipe is also connected to the working pipe, and a third valve is provided on the working pipe.

[0010] The beneficial effects of this utility model are as follows: By adding a buffer tank to one side of the high-pressure storage tank and controlling the pressure inside the buffer tank through the first valve and the second valve, the generation of dry ice can be avoided during sampling, reducing the risk of blockage, and thus high-purity carbon dioxide gas can be extracted, which facilitates subsequent purity testing of carbon dioxide gas. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model;

[0012] Figure 2 This is a physical image of the present invention.

[0013] In the diagram, 1 is the storage tank, 2 is the buffer tank, 21 is the inlet, 22 is the outlet, 23 is the support leg, 3 is the inlet pipe, 4 is the outlet pipe, 5 is the sampling pipe, 6 is the first valve, 7 is the second valve, 8 is the first pipe, and 9 is the third valve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0015] Example 1, as Figure 1 As shown, a simple sampling device for liquid carbon dioxide includes a storage tank 1 and a buffer tank 2. The buffer tank 2 is located on one side of the storage tank 1. The inlet 21 of the buffer tank 2 is connected to the storage tank 1 through an inlet pipe 3, and the outlet 22 of the buffer tank 2 is connected to an outlet pipe 4. The other end of the outlet pipe 4 is connected to a sampling pipe 5. A first valve 6 is provided on the inlet pipe 3, and a second valve 7 is provided on the outlet pipe 4. By controlling the opening and closing of the first valve 6 and the second valve 7, the carbon dioxide in the buffer tank 2 can be kept in a liquid state.

[0016] Specifically, the storage tank 1 is provided with an outlet, which is connected to the first pipe 8, and the first pipe 8 is connected to the liquid inlet pipe 3 through a flange.

[0017] The material of buffer tank 2 should be able to withstand the low temperature and high pressure of liquid carbon dioxide. Stainless steel or other corrosion-resistant and low-temperature resistant materials can be selected.

[0018] In this invention, storage tank 1 serves as the main storage container for liquid carbon dioxide. A buffer tank 2 is installed on one side of storage tank 1, and the inflow and outflow of the buffer tank 2 are controlled by a first valve 6 and a second valve 7. This allows the buffer tank 2 to provide an intermediate pressure step when carbon dioxide flows from the high-pressure storage tank to the normal pressure environment. In this way, the liquid carbon dioxide does not suddenly change from high pressure to normal pressure, but rather gradually depressurizes, thus preventing the liquid carbon dioxide from directly turning into dry ice due to a sudden pressure drop. Through this pressure stabilization measure, liquid carbon dioxide can be temporarily stored in the buffer tank 2, and samples can be taken in gaseous form at the sampling port, facilitating subsequent purity testing.

[0019] Furthermore, the bottom of the buffer tank 2 is provided with support legs 23. The support legs not only enhance the stability of the entire device, but also prevent the buffer tank 2 from directly contacting the ground and generating heat conduction, thereby avoiding any impact on the temperature inside the buffer tank 2.

[0020] Furthermore, the first pipeline 8 is also connected to the working pipeline, which is equipped with a third valve 9; without affecting the sampling process, some liquid carbon dioxide can be directly guided to other working systems or stored for backup, increasing the flexibility and practicality of the device.

[0021] In Example 2, unlike Example 1, a pressure gauge is installed on the buffer tank 2. This pressure gauge allows operators to monitor pressure changes within the buffer tank 2 in real time, and to adjust the opening of the first valve 6 and the second valve 7 accordingly, ensuring the stability of subsequent sampling and the accuracy of the test results.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A simple sampling device for liquid carbon dioxide, characterized in that, The system includes a storage tank and a buffer tank. The buffer tank is located on one side of the storage tank. The inlet of the buffer tank is connected to the storage tank through an inlet pipe, and the outlet of the buffer tank is connected to an outlet pipe. The other end of the outlet pipe is connected to a sampling pipe. A first valve is installed on the inlet pipe, and a second valve is installed on the outlet pipe. By controlling the opening and closing of the first and second valves, the carbon dioxide in the buffer tank can be kept in a liquid state.

2. The simplified sampling device for liquid carbon dioxide according to claim 1, characterized in that, The bottom of the buffer tank is equipped with support legs.

3. The simplified sampling device for liquid carbon dioxide according to claim 1, characterized in that, A pressure gauge is installed on the buffer tank.

4. The simplified sampling device for liquid carbon dioxide according to claim 1, characterized in that, The storage tank is provided with an outlet, which is connected to a first pipeline, and the first pipeline is connected to an inlet pipeline via a flange.

5. The simplified sampling device for liquid carbon dioxide according to claim 4, characterized in that, The first pipeline is also connected to the working pipeline, and a third valve is installed on the working pipeline.

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