Dry gas seal recovery system of refrigerant compressor

Abstract

The utility model relates to a dry gas seal recovery system of a refrigerant compressor, and relates to the technical field of compressors, the recovery system comprises a collection unit connected with a primary leakage gas pipeline, and a collection tank used for collecting leakage gas is arranged in the collection unit; the collecting tank is provided with a pressurizing unit for increasing the pressure of the leaked gas discharged by the collecting tank to a set pressure value, and the pressurizing unit is provided with a recycling assembly for recycling the pressurized leaked gas. Leakage gas discharged by the first-stage leakage gas pipeline is collected through the collecting tank, the collecting tank discharges the collected leakage gas into the pressurizing unit, the pressurizing unit pressurizes the leakage gas discharged into the pressurizing pump by the collecting tank to a set pressure value, and finally the pressurized leakage gas is discharged into the recycling assembly to be recycled. Therefore, the leaked refrigerant can be recycled and reused, the operation cost of a production enterprise is reduced, and environmental pollution is reduced.

Description

Technical Field

[0001] This application relates to the technical field of compressors, and particularly to a dry gas seal recovery system for refrigerant compressors. Background Art

[0002] In the application equipment of compressor dry gas seals, the primary leakage gas of most refrigerant compressors is generally directly discharged through pipelines to the flare network for combustion.

[0003] However, for some refrigerant media with very expensive raw materials, even a small amount of refrigerant medium leaking into the flare network will cause a considerable degree of resource waste. Taking a typical refrigerant compressor as an example, the primary leakage gas emissions at the drive end and non-drive end of the dry gas seal are about 0.5 - 1 Nm3 / h, and the total annual emissions are as high as 4000 - 8000 Nm3. Discharging so much refrigerant medium to the flare network will cause great waste, and thus significantly increase the operating cost of production enterprises. Utility Model Content

[0004] In order to enable the recovered refrigerant to be recycled and reused, reduce the operating cost of production enterprises and reduce environmental pollution, this application provides a dry gas seal recovery system for refrigerant compressors.

[0005] The dry gas seal recovery system for refrigerant compressors provided by this application adopts the following technical solutions:

[0006] The dry gas seal recovery system for refrigerant compressors includes a collection unit connected to the primary leakage gas pipeline. A collection tank for collecting leakage gas is arranged in the collection unit. A pressurization unit for increasing the leakage gas discharged from the collection tank to a set pressure value is arranged on the collection tank, and a recovery component for recycling the pressurized leakage gas is arranged on the pressurization unit.

[0007] By adopting the above technical solutions, the collection tank collects the leakage gas discharged from the primary leakage gas pipeline. The collection tank discharges the collected leakage gas into the pressurization unit. The pressurization unit pressurizes the leakage gas discharged from the collection tank into the booster pump to a set pressure value, and finally discharges the pressurized leakage gas into the recovery component for recycling again, so as to enable the recovered refrigerant to be recycled and reused, reduce the operating cost of production enterprises and reduce environmental pollution.

[0008] Further, the pressurization unit includes:

[0009] A booster pump, which is connected to the collection tank through a second connecting pipe and is used for pressurizing the leakage gas. The output end of the booster pump is connected to the recovery component;

[0010] A driving gas source, which is connected to the booster pump through a third connecting pipe and is used to supply pressurized gas to the booster pump;

[0011] A control component, which is arranged on the third connecting pipe and is used to control the flow rate in the third connecting pipe;

[0012] An adjusting component, which is arranged on the second connecting pipe and controls the start and stop of the booster pump according to the pressure value in the second connecting pipe.

[0013] By adopting the above technical solution, the driving gas source supplies gas to the booster pump and pressurizes the leaked gas discharged from the collection tank. The pressurized leaked gas is discharged into the recovery component for recycling. Among them, the control component controls the gas supply amount of the driving gas source to the booster pump, and the adjusting component controls the start and stop of the booster pump.

[0014] Furthermore, the control component includes:

[0015] A third ball valve, which is arranged on the third connecting pipe and is used to control the flow rate in the third connecting pipe;

[0016] A third pressure gauge, which is connected to the third connecting pipe and is used to detect the air pressure value discharged into the booster pump in the third connecting pipe;

[0017] A pressure regulating valve, which is arranged on the third connecting pipe and is used to regulate the air pressure value in the third connecting pipe.

[0018] By adopting the above technical solution, the third ball valve controls the flow rate in the third flow pipe. Through the combined action of the third pressure gauge and the pressure regulating valve, the air pressure value in the third connecting pipe is adjusted to the specified size.

[0019] Furthermore, the adjusting component includes:

[0020] A pressure transmitter, which is arranged on the second connecting pipe and is used to detect the pressure value in the second connecting pipe and convert it into a signal value;

[0021] An electromagnetic valve, which is arranged on the booster pump and is used to control the start and stop of the booster pump;

[0022] A controller, which is arranged on the pressure transmitter and controls the start and stop of the electromagnetic valve according to the signal value of the pressure transmitter.

[0023] By adopting the above technical solution, the pressure transmitter detects the pressure value in the second connecting pipe, and the electromagnetic valve controls the start and stop of the controller, so as to realize the control of the start and stop of the booster pump.

[0024] Furthermore, the recovery component includes:

[0025] A recovery pipe, which is arranged at the outlet of the booster pump and is used to discharge the pressurized leaked gas;

[0026] A compressor, which is arranged on the recovery pipe and is used to recycle the pressurized leaked gas again;

[0027] A recovery pressure gauge, which is arranged on the recovery pipe and is used to detect the pressure value in the recovery pipe;

[0028] A first one-way valve, which is arranged on the recovery pipe and only allows gas to be discharged from the booster pump into the compressor;

[0029] A recovery ball valve, which is arranged on the recovery pipe and is used to control the flow rate in the recovery pipe.

[0030] By adopting the above technical solution, the recovery pipe discharges the gas pressurized by the booster pump into the compressor for recycling, the recovery pressure gauge detects the pressure value of the gas, and the first one-way valve prevents the gas in the compressor from flowing back, so as to realize the recycling of the gas pressurized by the booster pump.

[0031] Further, the collection unit includes:

[0032] A first connecting pipe, which is used to connect the primary leakage gas pipeline and the collection tank;

[0033] A first ball valve, which is arranged on the first connecting pipe and is used to control the flow rate in the first connecting pipe;

[0034] A first pressure gauge, which is arranged on the first connecting pipe and is used to detect the pressure value in the collection tank;

[0035] A back pressure valve, which is arranged on the first connecting pipe and is used to balance the pressure value between the first pressure gauge and the collection tank.

[0036] By adopting the above technical solution, when the first ball valve is opened, the leaked gas in the primary leakage gas pipeline is discharged into the collection tank, and the back pressure valve balances the pressure values at both ends, so as to facilitate the first pressure gauge to detect the pressure value in the collection tank.

[0037] Further, a protection mechanism for preventing the collection unit or the booster unit from being damaged is arranged on the collection unit, the collection tank and the booster unit, and the protection mechanism includes:

[0038] A torch, which is used to burn and treat the leaked gas discharged into the air;

[0039] A first protection component, which is arranged on the first connecting pipe and cooperates with the first ball valve to discharge the leaked gas in the first connecting pipe into the torch;

[0040] A second protection component, which is arranged on the collection tank and discharges the excess leaked gas in the collection tank into the flare when the pressure value in the collection tank is greater than the set value;

[0041] A third protection component, which is arranged on the leakage end of the booster pump and is used to discharge the leaked gas of the booster pump into the flare.

[0042] By adopting the above technical solutions, when the collection unit is damaged, the leaked gas in the first connecting pipe is discharged into the flare through the first protection component; when the pressure value in the collection tank is greater than the set value, the second protection component discharges the excess leaked gas in the collection tank into the flare; when the booster pump leaks, the third protection component discharges the leaked gas of the booster pump into the flare, and the leaked gas is then processed through the flare and discharged into the air, thereby reducing the degree of environmental pollution.

[0043] Further, the second protection component includes:

[0044] A vent pipe, which is arranged on the vent end of the collection tank and is used to discharge the gas discharged from the vent end of the collection tank into the flare;

[0045] A second ball valve, which is arranged on the vent pipe and is used to control the flow rate in the vent pipe;

[0046] A safety valve, which is arranged on the vent pipe and controls the start and stop of the safety valve according to the pressure value in the collection tank.

[0047] By adopting the above technical solutions, when the second ball valve is opened and the pressure value in the collection tank exceeds the set value, the safety valve is opened, so that the excess leaked gas in the collection tank is discharged into the flare through the vent pipe for combustion treatment; when the pressure value in the collection tank is less than the set value, the safety valve is closed, thereby keeping the pressure value in the collection tank within the safe range all the time.

[0048] Further, a filter for filtering the gas discharged from the driving gas source is arranged on the third connecting pipe.

[0049] By adopting the above technical solutions, the gas discharged from the driving gas source is filtered through the filter, reducing the probability of impurities entering the booster pump.

[0050] In summary, the present application includes at least one of the following beneficial technical effects:

[0051] The leaked gas discharged from the primary leakage gas pipeline is collected by a collection tank. The collection tank discharges the collected leaked gas into a booster pump. The booster pump boosts the leaked gas discharged from the collection tank into the booster pump to a set pressure value through a driving gas source, and finally discharges the boosted leaked gas into a compressor for recycling again, so as to enable the leaked refrigerant to be recovered and reused, reduce the operating costs of production enterprises and reduce environmental pollution. Description of the Drawings

[0052] Figure 1 is a schematic structural diagram of the recovery system of the present application;

[0053] Figure 2 is Figure 1 an enlarged schematic view of part A in

[0054] Figure 3 is Figure 1 an enlarged schematic view of part B in

[0055] Reference numerals: 1, primary leakage gas pipeline; 2, collection unit; 21, first connecting pipe; 22, first ball valve; 23, first pressure gauge; 24, back pressure valve; 3, collection tank; 4, boosting unit; 41, booster pump; 42, driving gas source; 43, third connecting pipe; 44, control assembly; 441, third ball valve; 442, third pressure gauge; 443, pressure regulating valve; 444, filter; 45, regulating assembly; 451, pressure transmitter; 452, solenoid valve; 453, controller; 5, recovery assembly; 51, recovery pipe; 52, compressor; 53, recovery pressure gauge; 54, first check valve; 55, recovery ball valve; 6, protection mechanism; 61, flare; 62, first protection assembly; 621, bypass pipe; 622, bypass ball valve; 63, second protection assembly; 631, vent pipe; 632, second ball valve; 633, safety valve; 64, third protection assembly; 641, safety pipe; 642, fourth ball valve; 643, second check valve. Detailed Description of the Embodiments

[0056] The following Figures 1-3 further describes the present application in detail with reference to the accompanying

[0057] The embodiment of the present application discloses a dry gas seal recovery system for a refrigerant compressor.

[0058] Referring to Figure 1 , the dry gas seal recovery system of the refrigerant compressor includes a collection unit 2 connected to the primary leakage gas pipeline 1. A collection tank 3 for collecting leaked gas is arranged in the collection unit 2. A boosting unit 4 for increasing the leaked gas discharged from the collection tank 3 to a set pressure value is arranged on the collection tank 3. A recovery assembly 5 for recycling the boosted leaked gas is arranged on the boosting unit 4.

[0059] Reference Figure 1 and Figure 2 As shown in FIGS. 1 and 2, the collection unit 2 includes a first connecting pipe 21, a first ball valve 22, a first pressure gauge 23 and a back pressure valve 24. One end of the first connecting pipe 21 is fixedly installed on the primary leakage gas pipeline 1 and communicates with the inside of the primary leakage gas pipeline 1, and the other end of the first connecting pipe 21 is fixedly installed on the collection tank 3 and communicates with the input end of the collection tank 3, so as to discharge the leakage gas in the primary leakage gas pipeline 1 into the collection tank 3; The first ball valve 22 is fixedly installed on the first connecting pipe 21, and the first ball valve 22 is used to control the flow rate in the first connecting pipe 21; The first pressure gauge 23 is fixedly installed on the first connecting pipe 21 and is located between the first ball valve 22 and the collection tank 3, and the first pressure gauge 23 is used to detect the pressure value in the collection tank 3; The back pressure valve 24 is fixedly installed on the first connecting pipe 21 and is located between the first pressure gauge 23 and the collection tank 3, and the back pressure valve 24 is used to balance the pressure value between the first pressure gauge 23 and the collection tank 3, so as to improve the accuracy of the first pressure gauge 23 in detecting the pressure in the collection tank 3; In this embodiment, when the collection unit 2 is in normal use, the first ball valve 22 is in the open state.

[0060] Reference Figure 1 and Figure 3 As shown in FIGS. 3 and 4, the pressurization unit 4 includes a booster pump 41 and a driving gas source 42. The booster pump 41 is fixedly installed on the frame, and the input end of the booster pump 41 communicates with the output end of the collection tank 3 through a second connecting pipe. The output end of the booster pump 41 is connected to the recovery assembly 5. Specifically, the booster pump 41 pressurizes the leakage gas discharged from the collection tank 3, and pressurizes the leakage gas discharged from the collection tank 3 to a set pressure value and then discharges it into the recovery assembly 5, so as to realize the recovery and reuse of the refrigerant in the leakage gas, reduce the operating cost of the production enterprise and reduce environmental pollution; The driving gas source 42 is fixedly installed on the frame, and the driving gas source 42 communicates with the pressurization end of the booster pump 41 through a third connecting pipe 43. The driving gas source 42 is used to provide pressurized gas for pressurizing the booster pump 41; The pressurized gas in this embodiment contains refrigerant, so as to pressurize the recovered and reused leakage gas and increase the refrigerant.

[0061] Reference Figure 1 and Figure 3, the pressurization unit 4 further includes a control component 44. The control component 44 is arranged on the third connecting pipe 43 and is used to control the flow rate in the third connecting pipe 43. The control component 44 includes a third ball valve 441, a third pressure gauge 442, and a pressure regulating valve 443. The third ball valve 441 is fixedly installed on the third connecting pipe 43 and is used to control the flow rate in the third connecting pipe 43; the third pressure gauge 442 is fixedly installed on the third connecting pipe 43, and the third pressure gauge 442 communicates with the inside of the third connecting pipe 43. The third pressure gauge 442 is used to detect the air pressure value discharged into the booster pump 41 in the third connecting pipe 43; the pressure regulating valve 443 is fixedly installed on the third connecting pipe 43, and the pressure regulating valve 443 is used to adjust the air pressure value in the third connecting pipe 43. The gas in the driving gas source 42 sequentially passes through the third ball valve 441, the third pressure gauge 442, and the pressure regulating valve 443 and enters the booster pump 41; when the booster pump 41 of this embodiment is in normal use, the third ball valve 441 is in an open state.

[0062] Referring to Figure 1 , in order to reduce the impurity content in the gas provided in the driving gas source 42, a filter 444 is fixedly installed on the third connecting pipe 43. The filter gas is located between the third pressure gauge 442 and the pressure regulating valve 443. The filter 444 is used to filter the gas discharged from the driving gas source 42.

[0063] Referring to Figure 1 and Figure 3 , the pressurization unit 4 further includes an adjustment component 45. The adjustment component 45 is arranged on the second connecting pipe. The adjustment component 45 controls the start and stop of the booster pump 41 according to the pressure value in the second connecting pipe. The adjustment component 45 includes a pressure transmitter 451, a solenoid valve 452, and a controller 453. The pressure transmitter 451 is fixedly installed on the second connecting pipe. The pressure transmitter 451 is used to detect the pressure value in the second connecting pipe and convert the pressure value in the second connecting pipe into a signal value; the solenoid valve 452 is fixedly installed on the booster pump 41. The solenoid valve 452 is used to control the start and stop of the booster pump 41; the controller 453 is fixedly installed on the pressure transmitter 451. The controller 453 controls the start and stop of the solenoid valve 452 according to the signal value of the pressure transmitter 451.

[0064] Referring to Figure 1 and Figure 3, the recovery assembly 5 includes a recovery pipe 51, a compressor 52, a recovery pressure gauge 53, a first check valve 54, and a recovery ball valve 55. The recovery pipe 51 is fixedly installed at the outlet of the booster pump 41 and is used to discharge the pressurized leaked gas. The compressor 52 is fixedly installed on the frame, and the feed end of the compressor 52 is interconnected with the end of the recovery pipe 51 away from the booster pump 41. The compressor 52 is used to recycle the pressurized leaked gas again. The recovery pressure gauge 53 is fixedly installed on the recovery pipe 51 and is used to detect the pressure value in the recovery pipe 51 to ensure that the gas pressure entering the compressor 52 reaches the set value. The first check valve 54 is fixedly installed on the recovery pipe 51. The first check valve 54 only allows the gas discharged from the booster pump 41 to enter the compressor 52 to prevent the gas in the compressor 52 from flowing back. The recovery ball valve 55 is fixedly installed on the recovery pipe 51 and is used to control the flow rate in the recovery pipe 51. During use, the gas pressurized by the booster pump 41 sequentially passes through the recovery pressure gauge 53, the first check valve 54, and the recovery ball valve 55 and finally enters the compressor 52 to achieve the recovery and utilization of the leaked gas. When the recovery assembly 5 of this embodiment is working properly, the recovery ball valve 55 is in the open state.

[0065] Refer to Figure 1 and Figure 2 , a protection mechanism 6 for placing the collection unit 2 or the booster unit 4 damaged is provided on the collection unit 2, the collection tank 3, and the booster unit 4. The protection mechanism 6 includes a flare 61, a first protection assembly 62, a second protection assembly 63, and a third protection assembly 64. The flare 61 is fixedly installed on the frame, and a pipe network is fixedly installed in the flare 61. The flare 61 is used to burn and process the leaked gas discharged into the air. By pressurizing the leaked gas through the booster pump 41 and recycling it, the load of the flare 61 is reduced. The first protection assembly 62 is fixedly installed on the first connecting pipe 21 and cooperates with the first ball valve 22 to discharge the leaked gas in the first connecting pipe 21 into the flare 61. The first protection assembly 62 includes a bypass pipe 621 and a bypass ball valve 622. The bypass pipe 621 is fixedly installed on the first connecting pipe 21, and the connection point of the bypass pipe 621 and the first connecting pipe 21 is located between the first ball valve 22 and the primary leaked gas pipeline 1. The bypass ball valve 622 is fixedly installed on the bypass pipe 621 and is used to control the flow rate in the bypass pipe 621. When the collection unit 2 is damaged, the first ball valve 22 is closed, and at the same time, the bypass ball valve 622 is opened so that the leaked gas discharged from the primary leaked gas pipeline 1 enters the flare 61 through the bypass pipe 621 and is discharged into the air after being burned and processed by the flare 61.

[0066] Refer to Figure 1 and Figure 2, the second protection component 63 is arranged on the collection tank 3. After the pressure value in the collection tank 3 is greater than the set value, the excess leaked gas in the collection tank 3 is discharged into the flare 61. The second protection component 63 includes a vent pipe 631, a second ball valve 632 and a safety valve 633. The vent pipe 631 is fixedly installed at the vent end of the collection tank 3, and the end of the vent pipe 631 away from the collection tank 3 is fixedly installed on the flare 61. The vent pipe 631 is used to discharge the leaked gas discharged from the vent end of the collection tank 3 into the flare 61; the second ball valve 632 is fixedly installed on the vent pipe 631, and the second ball valve 632 is used to control the flow rate in the vent pipe 631; the safety valve 633 is fixedly installed on the vent pipe 631 and automatically opens when the pressure value in the collection tank 3 exceeds the set value, so as to discharge part of the leaked gas in the collection tank 3 into the flare 61 through the vent pipe 631, thereby reducing the pressure value in the collection tank 3. When the pressure value in the collection tank 3 is less than the set value, the safety valve 633 automatically closes; when the collection tank 3 of this embodiment is in normal use, the second ball valve 632 is in the open state.

[0067] Refer to Figure 1 and Figure 3 , the third protection component 64 is arranged on the leakage end of the booster pump 41. The third protection component 64 is used to discharge the gas leaked from the booster pump 41 into the flare 61. The third protection component 64 includes a safety pipe 641, a fourth ball valve 642 and a second one-way valve 643. The safety pipe 641 is fixedly installed on the leakage end of the booster pump 41 and communicates with the flare 61. The safety pipe 641 is used to discharge the leaked gas in the booster pump 41 into the flare 61. The fourth ball valve 642 is fixedly installed on the safety pipe 641, and the fourth ball valve 642 is used to control the flow rate in the safety pipe 641. The second one-way valve 643 is fixedly installed on the safety pipe 641. The second one-way valve 643 only allows the gas to be filled into the booster pump 41 and discharged into the flare 61, so as to discharge the gas leaked in the booster pump 41 into the flare 61 for combustion treatment.

[0068] The working principle of the embodiment of the present application is as follows:

[0069] The leaked gas discharged from the primary leakage gas pipeline is collected by the collection tank 3. The collection tank 3 discharges the collected leaked gas into the booster pump 41. The booster pump 41 pressurizes the leaked gas discharged from the collection tank 3 into the booster pump 41 to the set pressure value through the driving gas source 42, and finally discharges the pressurized leaked gas into the compressor 52 for recycling, so as to enable the leaked refrigerant to be recovered and reused, reduce the operating cost of production enterprises and reduce environmental pollution.

[0070] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. Dry gas seal recovery system for a refrigerant compressor, characterized in that: It includes a collection unit (2) connected to a primary leakage gas pipeline (1). A collection tank (3) for collecting leakage gas is arranged in the collection unit (2). A pressurization unit (4) for increasing the leakage gas discharged from the collection tank (3) to a set pressure value is arranged on the collection tank (3). A recovery component (5) for recycling the pressurized leakage gas is arranged on the pressurization unit (4).

2. The dry gas seal recovery system of the refrigerant compressor according to claim 1, wherein: The pressurization unit (4) includes: A booster pump (41), which is communicated with the collection tank (3) through a second connecting pipe and is used for pressurizing the leakage gas. The output end of the booster pump (41) is communicated with the recovery component (5); A driving gas air source (42), which is communicated with the booster pump (41) through a third connecting pipe (43) and is used for providing pressurized gas to the booster pump (41); A control component (44), which is arranged on the third connecting pipe (43) and is used for controlling the flow rate in the third connecting pipe (43); An adjustment component (45), which is arranged on the second connecting pipe and controls the start and stop of the booster pump (41) according to the pressure value in the second connecting pipe.

3. The dry gas seal recovery system of the refrigerant compressor according to claim 2, wherein: The control component (44) includes: A third ball valve (441), which is arranged on the third connecting pipe (43) and is used for controlling the flow rate in the third connecting pipe (43); A third pressure gauge (442), which is communicated with the third connecting pipe (43) and is used for detecting the air pressure value discharged into the booster pump (41) in the third connecting pipe (43); A pressure regulating valve (443), which is arranged on the third connecting pipe (43) and is used for regulating the air pressure value in the third connecting pipe (43).

4. The dry gas seal recovery system for a refrigerant compressor according to claim 2, characterized in that: The adjustment component (45) includes: A pressure transmitter (451), which is arranged on the second connecting pipe and is used for detecting the pressure value in the second connecting pipe and converting it into a signal value; An electromagnetic valve (452), which is arranged on the booster pump (41) and is used for controlling the start and stop of the booster pump (41); A controller (453), which is arranged on the pressure transmitter (451) and controls the start and stop of the electromagnetic valve (452) according to the signal value of the pressure transmitter (451).

5. The dry gas seal recovery system of the refrigerant compressor according to claim 1, characterized in that: The recovery component (5) includes: A recovery pipe (51), which is arranged at the output port of the booster pump (41) and is used for discharging the pressurized leakage gas; A compressor (52), which is arranged on the recovery pipe (51) and is used for recycling the pressurized leakage gas again; A recovery pressure gauge (53), which is arranged on the recovery pipe (51) and is used for detecting the pressure value in the recovery pipe (51); A first check valve (54), which is arranged on the recovery pipe (51) and only allows gas to be discharged from the booster pump (41) into the compressor (52); Recovery ball valve (55), the recovery ball valve (55) is arranged on the recovery pipe (51) and is used to control the flow rate in the recovery pipe (51).

6. The dry gas seal recovery system of a refrigerant compressor according to claim 2, characterized in that: The collection unit (2) includes: The first connecting pipe (21), the first connecting pipe (21) is used to connect the primary leakage gas pipeline (1) and the collection tank (3); The first ball valve (22), the first ball valve (22) is arranged on the first connecting pipe (21) and is used to control the flow rate in the first connecting pipe (21); The first pressure gauge (23), the first pressure gauge (23) is arranged on the first connecting pipe (21) and is used to detect the pressure value in the collection tank (3); Back pressure valve (24), the back pressure valve (24) is arranged on the first connecting pipe (21) and is used to balance the pressure value between the first pressure gauge (23) and the collection tank (3).

7. The dry gas seal recovery system of a refrigerant compressor according to claim 6, characterized in that: A protection mechanism (6) for preventing damage to the collection unit (2) or the boosting unit (4) is arranged on the collection unit (2), the collection tank (3) and the boosting unit (4), and the protection mechanism (6) includes: Torch (61), the torch (61) is used to burn and treat the leaked gas discharged into the air; The first protection component (62), the first protection component (62) is arranged on the first connecting pipe (21) and cooperates with the first ball valve (22) to discharge the leaked gas in the first connecting pipe (21) into the torch (61); The second protection component (63), the second protection component (63) is arranged on the collection tank (3), and after the pressure value in the collection tank (3) is greater than the set value, the excess leaked gas in the collection tank (3) is discharged into the torch (61); The third protection component (64), the third protection component (64) is arranged on the leakage end of the booster pump (41) and is used to discharge the gas leaked from the booster pump (41) into the torch (61).

8. The dry gas seal recovery system of the refrigerant compressor according to claim 7, characterized in that: The second protection component (63) includes: The vent pipe (631), the vent pipe (631) is arranged on the vent end of the collection tank (3) and is used to discharge the gas discharged from the vent end of the collection tank (3) into the torch (61); The second ball valve (632), the second ball valve (632) is arranged on the vent pipe (631) and is used to control the flow rate in the vent pipe (631); Safety valve (633), the safety valve (633) is arranged on the vent pipe (631) and controls the start and stop of the safety valve (633) according to the pressure value in the collection tank (3).

9. The dry gas seal recovery system for a refrigerant compressor according to claim 2, characterized in that: A filter (444) for filtering the discharged gas in the driving gas source (42) is arranged on the third connecting pipe (43).

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