High-purity helium filling device for BOG extraction

Abstract

The utility model belongs to the technical field of helium filling, and particularly relates to a BOG extraction high-purity helium filling device which comprises a high-purity helium buffer tank, an outlet of the high-purity helium buffer tank is connected with a compressor, an outlet of the compressor is connected with a main filling pipeline, and the end, away from the compressor, of the main filling pipeline is connected with a first filling pipeline and a second filling pipeline. One end, far away from the main filling pipeline, of the first filling pipeline and one end, far away from the main filling pipeline, of the second filling pipeline are provided with a first filling position and a second filling position respectively, an inlet of the high-purity helium buffer tank is connected with a standby pipeline, the other end of the standby pipeline is provided with a standby port, and the standby pipeline is provided with a self-operated regulating valve; and the three communicating ports are respectively communicated with the first filling pipeline, the second filling pipeline and the standby pipeline. According to the utility model, the filling time of the second long pipe can be shortened, and the filling efficiency and the utilization rate of the second long pipe are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of helium filling, and particularly relates to a BOG extraction high-purity helium filling device. Background Technique

[0002] Helium is a noble gas, which is abundant in the universe but scarce on the earth. It mainly exists in the atmosphere, rocks and natural gas. Helium is usually a colorless and odorless gas and is the only substance that cannot be solidified under standard atmospheric pressure. Its special physical properties determine its special uses. It is widely used in military, scientific research, petrochemical, refrigeration, medical, semiconductor, pipeline leak detection, superconducting experiments, metal manufacturing, deep-sea diving, high-precision welding, optoelectronic product production and other fields, which is of great significance for scientific research.

[0003] The content of helium is low, the extraction is difficult and the cost is high. At present, it mainly relies on extracting from natural gas BOG. However, due to the very low content of helium in LNG raw gas, its content is only about 260 - 650 PPmm, which will result in low helium production.

[0004] The existing method for filling high-purity helium is generally to directly fill the high-purity helium extracted from BOG into a tube trailer through a membrane compressor. This method takes too long to fill, generally about 7 - 15 days, resulting in too long filling time for the customer's tube trailer and low utilization rate. Content of the Utility Model

[0005] The purpose of the utility model is to provide a BOG extraction high-purity helium filling device to solve the problems raised in the above background technique.

[0006] To achieve the above technical purpose, the technical solution of the utility model is as follows:

[0007] A BOG extraction high-purity helium filling device includes a high-purity helium buffer tank. The outlet of the high-purity helium buffer tank is connected to a compressor, the outlet of the compressor is connected to a main filling pipeline, the end of the main filling pipeline far from the compressor is connected to a first filling pipeline and a second filling pipeline, and the ends of the first filling pipeline and the second filling pipeline far from the main filling pipeline are respectively provided with a first filling position and a second filling position;

[0008] The inlet of the high-purity helium buffer tank is connected to a standby pipeline, the other end of the standby pipeline is provided with a standby port, and a self-operated regulating valve is arranged on the standby pipeline;

[0009] It also includes a connecting pipeline. The connecting pipeline is provided with three connecting ports, and the three connecting ports are respectively communicated with the first filling pipeline, the second filling pipeline and the standby pipeline. Stop valves are arranged at the three connecting ports.

[0010] As an improvement, a purging and cleaning pipeline is also connected to the main filling pipeline. The other end of the purging and cleaning pipeline is connected to the communication pipeline, and a self-operated regulating valve and a check valve are provided on the purging and cleaning pipeline.

[0011] As a further improvement, recovery pipelines are provided on the first filling pipeline, the second filling pipeline and the standby pipeline. An airbag is provided at the other end of the recovery pipeline, and stop valves are provided on all three recovery pipelines.

[0012] As a further improvement, vacuum extraction pipelines are connected to the first filling pipeline, the second filling pipeline and the standby pipeline. A vacuum pump is provided at the other end of the vacuum extraction pipeline, and stop valves are provided on all three vacuum extraction pipelines.

[0013] As a further improvement, analysis pipelines are provided on the first filling pipeline, the second filling pipeline and the standby pipeline. An analysis sampling port is provided at the other end of the analysis pipeline, a self-operated regulating valve is provided at the analysis sampling port, and stop valves are provided on all three analysis pipelines.

[0014] As a further improvement, a third filling pipeline is also connected to the first filling pipeline. A third filling position is provided at the other end of the third filling pipeline, and a stop valve is provided on the third filling pipeline.

[0015] As a further improvement, check valves and stop valves are provided at positions on the first filling pipeline and the second filling pipeline close to the main filling pipeline, and stop valves are provided at positions on the first filling pipeline and the second filling pipeline close to the first filling position and the second filling position.

[0016] As a further improvement, a pressure maintaining valve is provided on the main filling pipeline.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the present utility model are as follows:

[0018] The BOG extraction high-purity helium filling device provided by the present utility model fills the high-purity helium in the first long tube into the second long tube by the method of equalizing pressure one by one, and then the remaining high-purity helium in the first long tube enters the high-purity helium buffer tank through the standby pipeline, and then after being pressurized by a compressor, it is filled into the second long tube through the second filling pipeline, shortening the filling time of the second long tube and improving the filling efficiency of the second long tube. Description of the Drawings

[0019] Figure 1 is the equipment flow chart of the embodiment;

[0020] Wherein: 1 - High-purity helium buffer tank, 2 - Compressor, 3 - Main filling pipeline, 4 - First filling pipeline, 5 - Second filling pipeline, 6 - First long pipe, 7 - Second long pipe, 8 - Spare pipeline, 9 - Spare port, 10 - Connecting pipeline, 11 - Pressure maintaining valve, 12 - Purge and wash pipeline, 13 - Analysis pipeline, 14 - Vacuum pump, 15 - Recovery pipeline, 16 - Airbag, 17 - Third filling pipeline, 18 - Third filling position, 19 - Vacuum pumping pipeline. Detailed implementation manners

[0021] The present utility model will be further described below in conjunction with the detailed implementation manners and the accompanying drawings. Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, not physical diagrams, and should not be construed as a limitation to the present application; in order to better illustrate the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0022] In the accompanying drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation to the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] As Figure 1 shown, a BOG extraction high-purity helium filling device includes a high-purity helium buffer tank 1. The outlet of the high-purity helium buffer tank 1 is connected to a compressor 2, the outlet of the compressor 2 is connected to a main filling pipeline 3, and one end of the main filling pipeline 3 away from the compressor 2 is connected to a first filling pipeline 4 and a second filling pipeline 5. The ends of the first filling pipeline 4 and the second filling pipeline 5 away from the main filling pipeline 3 are respectively provided with a first filling position and a second filling position, and the first filling position and the second filling position are respectively used to connect a first long pipe 6 and a second long pipe 7.

[0024] This embodiment further includes a spare pipeline 8. One end of the spare pipeline 8 is connected to the inlet of the high-purity helium buffer tank 1, and the other end is provided with a spare port 9. The spare port 9 is used to connect the first long pipe 6. A self-operated regulating valve, namely self-operated regulating valve PV03, is also provided on the spare pipeline 8.

[0025] Preferably, the first long pipe 6 is provided with two connection ports. One connection port is connected to the first filling position, and the other connection port is connected to the spare port 9.

[0026] In this embodiment, a connecting pipeline 10 is further included. The connecting pipeline 10 is provided with three connecting ports, which are respectively connected to the first filling pipeline 4, the second filling pipeline 5 and the standby pipeline 8. Stop valves are provided at the three connecting ports, namely stop valve V10A, stop valve V10B and stop valve V10C.

[0027] In this embodiment, the compressor 2 is a diaphragm compressor. A pressure maintaining valve 11 and a bypass valve V02 are provided at the outlet of the compressor 2. When the compressor 2 is working normally, the bypass valve V02 is closed. When the compressor 2 is closed, the bypass valve V02 is opened. Among them, the setting pressure of the pressure maintaining valve 11 is 10.0 MPa. When the outlet pressure of the compressor 2 reaches 10.0 MPa, the pressure maintaining valve 11 automatically opens, and high-purity helium enters the main filling pipeline 3 for filling at the filling position. The pressure maintaining valve 11 can stabilize the outlet pressure of the compressor 2 and does not require frequent adjustment of the oil pressure.

[0028] In this embodiment, a purging and cleaning pipeline 12 is connected to the main filling pipeline 3. The other end of the purging and cleaning pipeline 12 is connected to the connecting pipeline 10. A self-operated regulating valve and a check valve are provided on the purging and cleaning pipeline 12, namely self-operated regulating valve PV01 and check valve V05.

[0029] In this embodiment, recovery pipelines 15 are connected to the first filling pipeline 4, the second filling pipeline 5 and the standby pipeline 8 respectively. The other ends of the recovery pipelines 15 are connected to an airbag 16. Stop valves are provided on the three recovery pipelines, namely stop valve V08A, stop valve V08B and stop valve V08C.

[0030] Preferably, two airbags 16 are provided. One airbag 16 is connected to the recovery pipeline 15 connected to the first filling pipeline 4, and the recovery pipelines 15 connected to the second filling pipeline 5 and the standby pipeline 8 are jointly connected to the other airbag 16. One or three airbags 16 can also be provided, as long as the helium in the three recovery pipelines 15 can be recovered.

[0031] In this embodiment, analysis pipelines 13 are connected to the first filling pipeline 4, the second filling pipeline 5 and the standby pipeline 8 respectively. The other ends of the analysis pipelines 13 are provided with analysis sampling ports. Stop valves are provided on the three analysis pipelines, namely stop valve AE01A, stop valve AE01B and stop valve AE01C. A self-operated regulating valve is provided at the analysis sampling port, which is self-operated regulating valve PV02.

[0032] In this embodiment, check valves are provided at one ends of the first filling pipeline 4 and the second filling pipeline 5 close to the main filling pipeline 3, namely check valve V07A and check valve V07B respectively. Shut-off valves are provided at one ends of the first filling pipeline 4 and the second filling pipeline 5 connected to the main filling pipeline 3, namely shut-off valve V06A and shut-off valve V06B respectively. Shut-off valves are provided at the first filling position and the second filling position of the first filling pipeline 4 and the second filling pipeline 5, namely shut-off valve V11A and shut-off valve V11B respectively.

[0033] In this embodiment, a third filling pipeline 17 is further connected to the first filling pipeline 4. The other end of the third filling pipeline 17 is provided with a third filling position 18. A shut-off valve V12A is provided on the third filling pipeline 17. The third filling pipeline 17 can fill a container pallet or a single gas cylinder.

[0034] In this embodiment, a vacuum pumping pipeline 19 is further connected to the first filling pipeline 4, the second filling pipeline 5 and the spare pipeline 8. The other end of the vacuum pumping pipeline 19 is connected to a vacuum pump 14. Shut-off valves are provided on all three vacuum pumping pipelines 19, namely shut-off valve V09A, shut-off valve V09B and shut-off valve V09C respectively.

[0035] Preferably, there are two vacuum pumps 14. One vacuum pump 14 is connected to the vacuum pumping pipeline 19 connected to the first filling pipeline 4. The vacuum pumping pipelines 19 connected to the second filling pipeline 5 and the spare pipeline 8 are jointly connected to the other vacuum pump 14. In actual use, one or three vacuum pumps 14 can also be provided, as long as all three vacuum pumping pipelines 19 are connected to the vacuum pump 14.

[0036] Preferably, a shut-off valve V01 is provided at the position where the spare pipeline is connected to the high-purity helium buffer tank.

[0037] Under normal circumstances, the high-purity helium extracted by BOG enters the high-purity helium buffer tank 1, and then is compressed by the compressor 2. When the pressure reaches 10.0 MPa, the pressure maintaining valve 11 opens. The high-purity helium passes through the pressure maintaining valve 11, then through the main filling pipeline 3 and the first filling pipeline 4 and enters the self-owned long pipeline 6. At this time, the shut-off valve V06A, the check valve V07A and the shut-off valve V11A are all in the open state.

[0038] When the second longest tube 7 needs to be filled, connect the second longest tube 7 to the second filling position. Then, use the high-purity helium in the high-purity helium buffer tank 1 as the gas source to conduct positive pressure replacement or vacuum replacement on the hose in front of the main valve of the second longest tube 7. After the replacement is completed, open the stop valve V11B and the stop valve AE01B, and sample and analyze the helium gas in the hose in front of the main valve of the second longest tube 7 through the analysis pipeline 13 connected to the second filling pipeline 5. After the analysis is qualified, open the main valve of the second longest tube, use the gas in the second longest tube as the gas source to conduct positive pressure replacement or vacuum replacement on the hose in front of the main valve of the second longest tube. After the replacement is completed, analyze the gas in the hose in front of the main valve of the second longest tube. After the analysis is qualified, the second longest tube 7 can be filled. During filling, open the stop valve V10A and the stop valve V10B, and fill the high-purity helium in the first longest tube into the second longest tube in a way of equalizing pressure one by one. The high-purity helium in the first longest tube enters the second longest tube through the communication pipeline connected to the first filling pipeline and the communication pipeline connected to the second filling pipeline. After the equalizing pressure is completed, close the stop valve V10A and the stop valve V10B, open the stop valve V11C and the stop valve V01, and recover the remaining high-purity helium in the first longest tube into the high-purity helium buffer tank through the spare pipeline. At the same time, open the stop valve V06B on the second filling pipeline, and fill the high-purity helium in the high-purity helium buffer tank into the second longest tube through the compressor, the main filling pipeline and the second filling pipeline, which can shorten the filling time of the second longest tube.

[0039] In this embodiment, during positive pressure replacement, open the stop valve V10B on the communication pipeline. After the high-purity helium in the high-purity helium buffer tank is pressurized by the compressor, it enters the hose in front of the main valve of the second longest tube through the purge and cleaning pipeline and the communication pipeline connected to the second filling pipeline until the pressure in the hose in front of the main valve of the second longest tube reaches 1.0 MPa. Then, close the stop valve V10B and open the stop valve V08B. The gas in the hose in front of the main valve of the second longest tube enters the airbag, and one replacement is completed. Repeat the above operation. After eight replacements of the hose in front of the main valve of the second longest tube, analyze the gas in the hose in front of the main valve of the second longest tube.

[0040] In this embodiment, during vacuum replacement, open the stop valve V09B and the stop valve V11B, and conduct vacuum treatment on the hose in front of the main valve of the second longest tube through the vacuum pump until the vacuum degree in the hose in front of the main valve of the second longest tube < 10 Pa. Then, close the stop valve V09B and open the stop valve V01B. After the high-purity helium in the high-purity helium buffer tank is pressurized by the compressor, it enters the hose in front of the main valve of the second longest tube through the purge and cleaning pipeline and the communication pipeline until the pressure in the hose in front of the main valve of the second longest tube reaches 0.3 MPa. At this time, close the stop valve V01B and open the stop valve V08B. The gas in the hose in front of the main valve of the second longest tube is recovered into the airbag, and one replacement is completed. Repeat the above operation. After two replacements of the hose in front of the main valve of the second longest tube, analyze the hose in front of the main valve of the second longest tube.

[0041] Preferably, in actual application, vacuum replacement is generally adopted to make the gas in the hose before the second long tube main valve meet the filling requirements, and the consumption of high-purity helium is less during vacuum replacement.

[0042] The specific implementation manners of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A BOG extraction high-purity helium filling device, including a high-purity helium buffer tank, characterized in that, The outlet of the high-purity helium buffer tank is connected to a compressor, the outlet of the compressor is connected to a main filling pipeline, one end of the main filling pipeline far from the compressor is connected to a first filling pipeline and a second filling pipeline, and a first filling position and a second filling position are respectively arranged at the ends of the first filling pipeline and the second filling pipeline far from the main filling pipeline; The inlet of the high-purity helium buffer tank is connected to a standby pipeline, the other end of the standby pipeline is provided with a standby port, and a self-operated regulating valve is arranged on the standby pipeline; It further includes a connecting pipeline which is provided with three connecting ports, the three connecting ports are respectively communicated with the first filling pipeline, the second filling pipeline and the standby pipeline, and stop valves are arranged at the three connecting ports.

2. The BOG extraction high-purity helium filling device according to claim 1, characterized in that A purging and cleaning pipeline is further connected to the main filling pipeline, the other end of the purging and cleaning pipeline is connected to the connecting pipeline, and a self-operated regulating valve and a check valve are arranged on the purging and cleaning pipeline.

3. The BOG extraction high-purity helium filling device according to claim 2, characterized in that, Recovery pipelines are arranged on the first filling pipeline, the second filling pipeline and the standby pipeline, the other ends of the recovery pipelines are provided with air bags, and stop valves are arranged on the three recovery pipelines.

4. The BOG extraction high-purity helium filling device according to claim 3, wherein Vacuum pumping pipelines are connected to the first filling pipeline, the second filling pipeline and the standby pipeline, the other ends of the vacuum pumping pipelines are provided with vacuum pumps, and stop valves are arranged on the three vacuum pumping pipelines.

5. The BOG extraction high-purity helium filling device according to claim 4, wherein, Analysis pipelines are arranged on the first filling pipeline, the second filling pipeline and the standby pipeline, the other ends of the analysis pipelines are provided with analysis sampling ports, self-operated regulating valves are arranged at the analysis sampling ports, and stop valves are arranged on the three analysis pipelines.

6. The BOG extraction high-purity helium filling device according to any one of claims 1-5, characterized in that, A third filling pipeline is further connected to the first filling pipeline, the other end of the third filling pipeline is provided with a third filling position, and a stop valve is arranged on the third filling pipeline.

7. The BOG extraction high-purity helium filling device according to claim 6, characterized in that, Check valves and stop valves are arranged at positions of the first filling pipeline and the second filling pipeline close to the main filling pipeline, and stop valves are arranged at positions of the first filling pipeline and the second filling pipeline close to the first filling position and the second filling position.

8. The BOG extraction high-purity helium filling device according to claim 7, characterized in that A pressure maintaining valve is arranged on the main filling pipeline.

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