Carbon dioxide pipeline booster pump backflow testing device and testing method

Abstract

The invention provides a carbon dioxide pipeline booster pump backflow testing device and method. The device comprises a storage tank, a refrigerator, a pressure reducing valve, a booster pump, a temperature sensor and a pressure sensor. The storage tank is provided with a liquid inlet and a liquid outlet, the output end of the refrigerator is communicated with the liquid inlet of the storage tank, the liquid outlet of the storage tank is communicated with the input end of the booster pump, the output end of the booster pump is communicated with the input end of the pressure reducing valve, and the output end of the pressure reducing valve is communicated with the input end of the refrigerator; the refrigerator refrigerates the carbon dioxide; the booster pump pressurizes carbon dioxide; a pressure reducing valve reduces pressure of carbon dioxide; the temperature sensors and the pressure sensors are arranged at the two ends of the booster pump respectively. The refrigerator is used for refrigerating the carbon dioxide to reach the temperature for starting the pump, and the pressurized carbon dioxide is decompressed and refrigerated to realize self-circulation of the carbon dioxide, so that the aim of testing the performance of the booster pump is fulfilled, and the aim of detecting the real-time temperature and pressure of the booster pump in the self-circulation process is fulfilled.

Description

Technical Field

[0001] The present invention relates to the technical field of performance testing of carbon dioxide booster pumps, and particularly relates to a carbon dioxide pipeline booster pump reflux testing device and a testing method. Background Art

[0003] In some existing CCUS project pipeline engineering, large-scale long-distance carbon dioxide transportation has been achieved. However, before starting the pump, such pipelines need to be cooled and their performance tested, and currently, there is a lack of efficient testing means. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a carbon dioxide pipeline booster pump reflux testing device and a testing method.

[0005] A carbon dioxide pipeline booster pump reflux testing device includes: a storage tank, a refrigerator, a pressure reducing valve, a booster pump, at least two temperature sensors, and at least two pressure sensors;

[0006] The storage tank has a liquid inlet and a liquid outlet. The output end of the refrigerator is communicated with the liquid inlet of the storage tank. The liquid outlet of the storage tank is communicated with the input end of the booster pump. The output end of the booster pump is communicated with the input end of the pressure reducing valve. The output end of the pressure reducing valve is communicated with the input end of the refrigerator;

[0007] The refrigerator is used to refrigerate carbon dioxide so that the carbon dioxide forms a liquid state and enters the storage tank from the liquid inlet of the storage tank;

[0008] The booster pump is used to boost the pressure of carbon dioxide and transport the carbon dioxide to the input end of the pressure reducing valve;

[0009] The pressure reducing valve is used to reduce the pressure of carbon dioxide and transport the carbon dioxide to the input end of the refrigerator;

[0010] Each of the temperature sensors and each of the pressure sensors are respectively arranged at both ends of the booster pump.

[0011] In one embodiment, the temperature sensors include a first temperature sensor and a second temperature sensor. The first temperature sensor is arranged at the input end of the booster pump, and the second temperature sensor is arranged at the output end of the booster pump.

[0012] In one embodiment, the temperature sensors further include a third temperature sensor and a fourth temperature sensor. The third temperature sensor is arranged at the input end of the refrigerator, and the fourth temperature sensor is arranged at the output end of the refrigerator.

[0013] In one embodiment, the pressure sensor includes a first pressure sensor and a second pressure sensor. The first pressure sensor is disposed at the input end of the booster pump, and the second pressure sensor is disposed at the output end of the booster pump.

[0014] In one embodiment, the pressure sensor further includes a third pressure sensor and a fourth pressure sensor. The third pressure sensor is disposed at the input end of the cooler, and the fourth pressure sensor is disposed at the output end of the cooler.

[0015] In one embodiment, a flow sensor is further included, and the flow sensor is disposed between the storage tank and the booster pump.

[0016] In one embodiment, the booster pump is used to boost the pressure of carbon dioxide to 10 Mpa.

[0017] In one embodiment, the pressure reducing valve is used to reduce the pressure of carbon dioxide to 2 Mpa.

[0018] A method for testing the reflux of a carbon dioxide pipeline booster pump includes:

[0019] Using a cooler to cool carbon dioxide so that the carbon dioxide forms a liquid state and enters the storage tank through the liquid inlet of the storage tank;

[0020] Opening a valve to enable the liquid carbon dioxide in the storage tank to be transported to the booster pump through the liquid outlet;

[0021] Using the booster pump to boost the pressure of carbon dioxide and transporting the carbon dioxide to the input end of the pressure reducing valve;

[0022] Using the pressure reducing valve to reduce the pressure of carbon dioxide and transporting the carbon dioxide to the input end of the cooler; using the cooler to cool the carbon dioxide again so that the carbon dioxide forms a liquid state again and enters the storage tank through the liquid inlet of the storage tank to achieve the cyclic reflux of carbon dioxide;

[0023] Using a temperature sensor and a pressure sensor to detect the temperature and pressure of carbon dioxide before entering the booster pump and the temperature and pressure after being boosted by the booster pump.

[0024] In one embodiment, in the step of using the booster pump to boost the pressure of carbon dioxide, the booster pump boosts the pressure of carbon dioxide to 10 Mpa;

[0025] In the step of using the pressure reducing valve to reduce the pressure of carbon dioxide, the pressure reducing valve reduces the pressure of carbon dioxide to 2 Mpa.

[0026] The above-mentioned carbon dioxide pipeline booster pump reflux test device uses a refrigerator to refrigerate carbon dioxide to reach the starting temperature of the pump. At the same time, it decompresses and refrigerates the pressurized carbon dioxide to achieve the self-circulation of carbon dioxide, so as to achieve the purpose of testing the performance of the booster pump and to detect the real-time temperature and pressure of the booster pump during the self-circulation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 FIG. is a schematic structural diagram of a carbon dioxide pipeline booster pump reflux test device in an embodiment;

[0028] Figure 2 FIG. is a schematic flow chart of a carbon dioxide pipeline booster pump reflux test method in an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] Embodiment 1

[0031] In this embodiment, as Figure 1 shown, a carbon dioxide pipeline booster pump reflux test device is provided, which includes: a storage tank 110, a refrigerator 120, a pressure reducing valve 130, a booster pump 140, at least two temperature sensors and at least two pressure sensors; the storage tank 110 has a liquid inlet and a liquid outlet, the output end of the refrigerator 120 is communicated with the liquid inlet of the storage tank 110, the liquid outlet of the storage tank 110 is communicated with the input end of the booster pump 140, the output end of the booster pump 140 is communicated with the input end of the pressure reducing valve 130, and the output end of the pressure reducing valve 130 is communicated with the input end of the refrigerator 120; the refrigerator 120 is used to refrigerate carbon dioxide so that carbon dioxide forms a liquid state and enters the storage tank 110 from the liquid inlet of the storage tank 110; the booster pump 140 is used to pressurize carbon dioxide and transport carbon dioxide to the input end of the pressure reducing valve 130; the pressure reducing valve 130 is used to reduce the pressure of carbon dioxide and transport carbon dioxide to the input end of the refrigerator 120; each of the temperature sensors and each of the pressure sensors are respectively arranged at both ends of the booster pump 140.

[0032] In this embodiment, the refrigerator 120 cools carbon dioxide, causing the carbon dioxide to form a liquid and enter the storage tank 110 through the liquid inlet of the storage tank 110; the valve is opened to allow the liquid carbon dioxide in the storage tank 110 to be transported to the booster pump 140 through the liquid outlet; the booster pump 140 pressurizes the carbon dioxide so that the pressure of the carbon dioxide reaches 10 Mpa. It should be understood that since the carbon dioxide pipeline booster pump 140 reflux test device is a closed loop, the pressurized carbon dioxide needs to be depressurized before it can be input into the booster pump 140 again by the storage tank 110 to avoid excessive pressure. Therefore, the carbon dioxide pressurized by the booster pump 140 is transported to the input end of the pressure reducing valve 130; the pressure reducing valve 130 reduces the pressure of the carbon dioxide so that the pressure of the carbon dioxide drops to 2 Mpa and transports the carbon dioxide to the input end of the refrigerator 120; it should be understood that after the high-pressure carbon dioxide is depressurized by the pressure reducing valve 130, the pressure decreases and it is easy to gasify. Therefore, it is necessary to liquefy some of the gasified carbon dioxide again. Therefore, the depressurized carbon dioxide is input into the refrigerator 120 for refrigeration, which can effectively reduce the temperature of the carbon dioxide and liquefy some of the gasified carbon dioxide again. Subsequently, the refrigerator 120 cools the carbon dioxide again, causing the carbon dioxide to form a liquid again and enter the storage tank 110 through the liquid inlet of the storage tank 110, and the carbon dioxide in the storage tank 110 is transported to the booster pump 140 again to achieve the cyclic reflux of carbon dioxide.

[0033] During the cyclic reflux of carbon dioxide, a temperature sensor and a pressure sensor are used to detect the temperature and pressure of the carbon dioxide before it enters the booster pump 140 and the temperature and pressure after it is pressurized by the booster pump 140, so as to detect the performance of the booster pump 140.

[0034] It should be understood that in this embodiment, the storage tank 110 can temporarily store the fully liquid carbon dioxide cooled by the refrigerator 120, which can provide a buffer for the cyclic reflux of carbon dioxide. It should be understood that since carbon dioxide is sensitive to temperature changes and is easy to gasify, if the carbon dioxide coming out of the refrigerator 120 is directly transported to the booster pump 140 without being temporarily stored in the storage tank 110, it will cause carbon dioxide loss. Therefore, by setting the storage tank 110 as a buffer for the refrigerator 120 to transport to the booster pump 140, the gasification of carbon dioxide can be effectively reduced, the expansion of carbon dioxide can be reduced, and the loss of carbon dioxide can be reduced.

[0035] In one embodiment, the temperature sensor includes a first temperature sensor 151 and a second temperature sensor 152. The first temperature sensor 151 is disposed at the input end of the booster pump 140, and the second temperature sensor 152 is disposed at the output end of the booster pump 140.

[0036] In this embodiment, the first temperature sensor 151 is disposed between the storage tank 110 and the booster pump 140 and is used to measure the temperature of the carbon dioxide before it enters the booster pump 140. The second temperature sensor 152 is disposed between the booster pump 140 and the pressure reducing valve 130 and is used to measure the temperature of the carbon dioxide that has been boosted by the booster pump 140 but has not been reduced in pressure by the pressure reducing valve 130. Based on the detection results of the first temperature sensor 151 and the second sensor, the temperature change of the carbon dioxide before and after being boosted by the booster pump 140 can be calculated.

[0037] In one embodiment, the temperature sensors further include a third temperature sensor 153 and a fourth temperature sensor 154. The third temperature sensor 153 is disposed at the input end of the cooler 120, and the fourth temperature sensor 154 is disposed at the output end of the cooler 120.

[0038] In this embodiment, the third temperature sensor 153 is disposed between the pressure reducing valve 130 and the cooler 120 and is used to measure the temperature of the carbon dioxide that has been reduced in pressure by the pressure reducing valve 130 but has not been cooled yet. The fourth temperature sensor 154 is disposed between the cooler 120 and the storage tank 110 and is used to measure the temperature of the carbon dioxide that has been cooled by the cooler 120. In this way, based on the detection results of the third temperature sensor 153 and the fourth sensor, the temperature change of the carbon dioxide before and after being cooled by the cooler 120 can be calculated. In addition, based on the detection results of the second temperature sensor 152 and the third sensor, the temperature change of the carbon dioxide before and after being reduced in pressure by the pressure reducing valve 130 can also be calculated.

[0039] In one embodiment, the pressure sensors include a first pressure sensor 161 and a second pressure sensor 162. The first pressure sensor 161 is disposed at the input end of the booster pump 140, and the second pressure sensor 162 is disposed at the output end of the booster pump 140.

[0040] In this embodiment, the first pressure sensor 161 is disposed between the storage tank 110 and the booster pump 140 and is used to measure the pressure of the carbon dioxide before it enters the booster pump 140. The second pressure sensor 162 is disposed between the booster pump 140 and the pressure reducing valve 130 and is used to measure the pressure of the carbon dioxide that has been boosted by the booster pump 140 but has not been reduced in pressure by the pressure reducing valve 130. Based on the detection results of the first pressure sensor 161 and the second sensor, the pressure change of the carbon dioxide before and after being boosted by the booster pump 140 can be calculated.

[0041] In one embodiment, the pressure sensors further include a third pressure sensor 163 and a fourth pressure sensor 164. The third pressure sensor 163 is disposed at the input end of the cooler 120, and the fourth pressure sensor 164 is disposed at the output end of the cooler 120.

[0042] In this embodiment, the third pressure sensor 163 is disposed between the pressure reducing valve 130 and the cooler 120 and is used to measure the pressure of the carbon dioxide that has not been cooled after being decompressed by the pressure reducing valve 130. The fourth pressure sensor 164 is disposed between the cooler 120 and the storage tank 110 and is used to measure the pressure of the carbon dioxide that has been cooled by the cooler 120. In this way, based on the detection results of the third pressure sensor 163 and the fourth sensor, the pressure change of the carbon dioxide before and after being cooled by the cooler 120 can be calculated. In addition, based on the detection results of the second pressure sensor 162 and the third sensor, the pressure change of the carbon dioxide before and after being decompressed by the pressure reducing valve 130 can also be calculated.

[0043] In one embodiment, the carbon dioxide pipeline booster pump 140 reflux test device further includes a flow sensor 170, and the flow sensor 170 is disposed between the storage tank 110 and the booster pump 140.

[0044] In this embodiment, the flow sensor 170 is used to measure the flow rate of the carbon dioxide in the pipeline. Through this flow sensor 170, the flow rate of the carbon dioxide from the storage tank 110 to the booster pump 140 can be detected.

[0045] In one embodiment, the booster pump 140 is used to boost the pressure of the carbon dioxide to 10 Mpa. In one embodiment, the pressure reducing valve 130 is used to reduce the pressure of the carbon dioxide to 2 Mpa.

[0046] In this embodiment, the air pressure of the carbon dioxide in the pipeline of the carbon dioxide pipeline booster pump 140 reflux test device is 2 Mpa. The booster pump 140 increases the pressure of the carbon dioxide to 10 Mpa and transports it to the pressure reducing valve 130. The pressure reducing valve 130 reduces the air pressure of the carbon dioxide to 2 Mpa, realizing the circulation of the carbon dioxide.

[0047] Embodiment 2

[0048] In this embodiment, as Figure 2 shown, a carbon dioxide pipeline booster pump reflux test method is provided, including:

[0049] Step 210, using a cooler to refrigerate carbon dioxide so that the carbon dioxide forms a liquid state and enters the storage tank from the liquid inlet of the storage tank.

[0050] Step 220, opening a valve so that the liquid carbon dioxide in the storage tank is transported to the booster pump through the liquid outlet.

[0051] In this embodiment, the valve is located in the pipeline between the liquid outlet of the storage tank and the booster pump. By opening this valve, the carbon dioxide can be made to flow and circulate.

[0052] Step 230: Use the booster pump to boost the pressure of carbon dioxide and deliver the carbon dioxide to the input end of the pressure reducing valve.

[0053] Step 240: Use the pressure reducing valve to reduce the pressure of carbon dioxide and deliver the carbon dioxide to the input end of the cooler.

[0054] Step 250: Use the cooler to cool the carbon dioxide again, once again causing the carbon dioxide to form a liquid and enter the storage tank from the liquid inlet of the storage tank, so as to achieve the cyclic reflux of carbon dioxide and return to Step 210.

[0055] Step 260: Use the temperature sensor and the pressure sensor to detect the temperature and pressure of the carbon dioxide before it enters the booster pump and the temperature and pressure after it is boosted by the booster pump, and return to Step 210.

[0056] In one embodiment, in the step of using the booster pump to boost the pressure of carbon dioxide, the booster pump boosts the pressure of carbon dioxide to 10 Mpa; in the step of using the pressure reducing valve to reduce the pressure of carbon dioxide, the pressure reducing valve reduces the pressure of carbon dioxide to 2 Mpa.

[0057] In this embodiment, the cooler cools the carbon dioxide, causing the carbon dioxide to form a liquid and enter the storage tank from the liquid inlet of the storage tank; the valve is opened so that the liquid carbon dioxide in the storage tank is delivered to the booster pump through the liquid outlet; the booster pump boosts the pressure of the carbon dioxide so that the pressure of the carbon dioxide reaches 10 Mpa. It should be understood that since the carbon dioxide pipeline booster pump reflux test device is a closed loop, the pressurized carbon dioxide needs to be depressurized before it can be input into the booster pump again by the storage tank to avoid excessive pressure. Therefore, the carbon dioxide boosted by the booster pump is delivered to the input end of the pressure reducing valve; the pressure reducing valve reduces the pressure of the carbon dioxide so that the pressure of the carbon dioxide drops to 2 Mpa and delivers the carbon dioxide to the input end of the cooler; it should be understood that after the high-pressure carbon dioxide is depressurized by the pressure reducing valve, the pressure decreases and it is easy to gasify. Therefore, it is necessary to liquefy some of the gasified carbon dioxide again. Therefore, the depressurized carbon dioxide is input into the cooler for refrigeration, which can effectively reduce the temperature of the carbon dioxide and liquefy some of the gasified carbon dioxide again. Subsequently, the cooler cools the carbon dioxide again, once again causing the carbon dioxide to form a liquid and enter the storage tank from the liquid inlet of the storage tank, and the carbon dioxide in the storage tank is delivered to the booster pump again to achieve the cyclic reflux of carbon dioxide.

[0058] In the above embodiments, a refrigerator is used to refrigerate carbon dioxide to reach the starting temperature of the pump. At the same time, the pressurized carbon dioxide is decompressed and refrigerated to realize the self-circulation of carbon dioxide, so as to achieve the purpose of testing the performance of the booster pump and detecting the real-time temperature and pressure of the booster pump during the self-circulation process.

[0059] Embodiment 3

[0060] In this embodiment, a method for testing the reflux of a carbon dioxide pipeline booster pump is provided, including:

[0061] (S1) Before the test, check the integrity of the process flow, check that the process equipment is in good condition, and all valves in the main process are in the closed state;

[0062] (S2) After preparation, inject low-temperature liquid carbon dioxide into the storage tank, open all valves in the main process, and the pressure reducing valve is also in the open state to fill the entire pipeline with carbon dioxide.

[0063] (S3) First, turn on the refrigerator, then start the booster pump, and the operating flow rate gradually increases;

[0064] (S4) Adjust the opening of the pressure reducing valve to control the pressure behind the valve at the pressure before pressurization (2 MPa);

[0065] (S5) Collect data on pipeline flow rate, pressure, temperature, and the head of the booster pump;

[0066] (S6) After the experiment, close the data acquisition program, and at the same time drain all the carbon dioxide in the pipeline to end the test.

[0067] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0068] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A reflux test device for a carbon dioxide pipeline booster pump, characterized in that, it includes: a storage tank, a cooler, a pressure reducing valve, a booster pump, at least two temperature sensors and at least two pressure sensors; The storage tank has a liquid inlet and a liquid outlet. The output end of the cooler is communicated with the liquid inlet of the storage tank. The liquid outlet of the storage tank is communicated with the input end of the booster pump. The output end of the booster pump is communicated with the input end of the pressure reducing valve. The output end of the pressure reducing valve is communicated with the input end of the cooler; The cooler is used to refrigerate carbon dioxide so that carbon dioxide forms a liquid state and enters the storage tank from the liquid inlet of the storage tank; The booster pump is used to boost the pressure of carbon dioxide and transport the carbon dioxide to the input end of the pressure reducing valve; The pressure reducing valve is used to reduce the pressure of carbon dioxide and transport the carbon dioxide to the input end of the cooler; Each of the temperature sensors and each of the pressure sensors are respectively arranged at both ends of the booster pump.

2. The reflux test device for a carbon dioxide pipeline booster pump according to claim 1, characterized in that, The temperature sensor includes a first temperature sensor and a second temperature sensor. The first temperature sensor is arranged at the input end of the booster pump, and the second temperature sensor is arranged at the output end of the booster pump.

3. The reflux test device for a carbon dioxide pipeline booster pump according to claim 2, characterized in that, The temperature sensor further includes a third temperature sensor and a fourth temperature sensor. The third temperature sensor is arranged at the input end of the cooler, and the fourth temperature sensor is arranged at the output end of the cooler.

4. The reflux test device for a carbon dioxide pipeline booster pump according to claim 1, characterized in that, The pressure sensor includes a first pressure sensor and a second pressure sensor. The first pressure sensor is arranged at the input end of the booster pump, and the second pressure sensor is arranged at the output end of the booster pump.

5. The reflux test device for a carbon dioxide pipeline booster pump according to claim 4, characterized in that, The pressure sensor further includes a third pressure sensor and a fourth pressure sensor. The third pressure sensor is arranged at the input end of the cooler, and the fourth pressure sensor is arranged at the output end of the cooler.

6. The reflux test device for a carbon dioxide pipeline booster pump according to claim 1, characterized in that, It further includes a flow sensor, and the flow sensor is arranged between the storage tank and the booster pump.

7. The reflux test device for a carbon dioxide pipeline booster pump according to claim 1, characterized in that, The booster pump is used to boost the pressure of carbon dioxide to 10 Mpa.

8. The reflux test device for a carbon dioxide pipeline booster pump according to claim 1, characterized in that, The pressure reducing valve is used to reduce the pressure of carbon dioxide to 2 Mpa.

9. A reflux test method for a carbon dioxide pipeline booster pump, characterized in that, it includes: Using a cooler to refrigerate carbon dioxide so that carbon dioxide forms a liquid state and enters the storage tank from the liquid inlet of the storage tank; Opening the valve so that the liquid carbon dioxide in the storage tank is transported to the booster pump through the liquid outlet; Use the booster pump to boost the pressure of carbon dioxide and transport the carbon dioxide to the input end of the pressure reducing valve; Use the pressure reducing valve to reduce the pressure of carbon dioxide and transport the carbon dioxide to the input end of the cooler; use the cooler to cool the carbon dioxide again, once again causing the carbon dioxide to form a liquid and enter the storage tank from the liquid inlet of the storage tank to achieve the circulating reflux of carbon dioxide; Use the temperature sensor and the pressure sensor to detect the temperature and pressure of carbon dioxide before entering the booster pump and the temperature and pressure after being boosted by the booster pump.

10. The carbon dioxide pipeline booster pump reflux test method according to claim 9, characterized in that, in the step of using the booster pump to boost the pressure of carbon dioxide, the booster pump boosts the pressure of carbon dioxide to 10 Mpa; in the step of using the pressure reducing valve to reduce the pressure of carbon dioxide, the pressure reducing valve reduces the pressure of carbon dioxide to 2 Mpa.

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