Dry Gas Seal Compressor Leakage Recovery System

Abstract

The present invention discloses a leakage gas recovery system for a dry gas sealed compressor, comprising a leakage recovery mechanism and a main compressor, wherein a dry gas seal is arranged on the main compressor, and a leakage port is arranged at the dry gas seal, the air inlet of the main compressor is connected to an air supply main pipe, and the air outlet of the main compressor is connected to an air outlet main pipe, the leakage recovery mechanism has an air inlet, a recovery port and a discharge port, and the recovery port and the discharge port of the leakage recovery mechanism are selectively connected to the air inlet, the leakage port is connected to the air inlet of the leakage recovery mechanism, and the recovery port of the leakage recovery mechanism is connected to the air supply main pipe. The structure is simple, and the leaked gas of the main compressor is sent back to the main air supply pipe through the recovery port or discharged through the discharge port through the leakage recovery mechanism, so that the entire leakage recovery mechanism has various functions and strong adaptability, and can flexibly choose to discharge or recover the collected gas.

Description

Technical Field

[0001] The invention belongs to the field of gas transmission equipment, and in particular relates to a dry gas sealed compressor leakage recovery system. Background Art

[0002] In the process of natural gas processing and transportation, booster compressors mostly use dry gas sealed compressors with natural gas as the sealing gas. In conventional designs, the leaked natural gas from the dry gas seal is directly discharged through a dedicated vent pipe, causing waste and environmental pollution. At the same time, there is also a risk of fire due to the accumulation of combustible gas at the discharge port. Summary of the invention

[0003] In order to solve the above technical problems, the object of the present invention is to provide a dry gas seal compressor leakage recovery system which is simple in structure and easy to use.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a dry gas sealed compressor leakage gas recovery system, comprising a leakage recovery mechanism and a main compressor, the main compressor is provided with a dry gas seal, the dry gas seal is provided with a leakage port, the air inlet of the main compressor is connected to the air supply main pipe, the air outlet of the main compressor is connected to the air outlet main pipe, the leakage recovery mechanism has an air inlet, a recovery port and a discharge port, and the recovery port and the discharge port of the leakage recovery mechanism are selectively connected to its air inlet, the leakage port is connected to the air inlet of the leakage recovery mechanism, and the recovery port of the leakage recovery mechanism is connected to the air supply main pipe.

[0005] The beneficial effects of the above technical solution are: its structure is simple, and the leaked gas of the main compressor is sent back to the main air supply pipe through the recovery port or discharged through the discharge port through the gas leakage recovery mechanism, so that the entire gas leakage recovery mechanism has diverse functions and strong adaptability, and can flexibly choose to discharge or recover the collected gas.

[0006] The above technical solution comprises multiple main compressors, each of which is respectively provided with a dry gas seal, and the air inlets of the multiple main compressors are connected to the air supply main pipe, the air outlets of the multiple main compressors are connected to the air outlet main pipe, and the multiple leakage ports are connected to the air inlet of the leakage recovery mechanism.

[0007] The beneficial effect of the above technical solution is that it makes the air delivery efficiency higher.

[0008] The gas leakage recovery mechanism described in the above technical scheme includes a first tee, a recovery compressor and an exhaust gas processor, the exhaust gas processor having an air inlet and an air outlet, a plurality of the leakage ports are connected to any one interface of the first tee, the remaining one interface of the first tee is connected to the air inlet of the recovery compressor, and a first valve is provided at the connection between the two, the air outlet of the recovery compressor is connected to the gas supply main pipe and constitutes the recovery port of the gas leakage recovery mechanism, the remaining other interface of the first tee is connected to the air inlet of the exhaust gas processor, and a second valve is provided at the connection between the two, and the air outlet of the exhaust gas processor constitutes the discharge port of the gas leakage recovery mechanism.

[0009] The beneficial effect of the above technical solution is that by setting up a recovery compressor and an exhaust gas processor, the collected gas is compressed by the recovery compressor for recovery or harmlessly treated by the exhaust gas processor for discharge.

[0010] The leaking gas recovery mechanism in the above technical solution also includes a liquid seal, a second tee is provided at the connection between the first valve and the air inlet of the recovery compressor, a third tee is provided at the connection between the second valve and the air inlet of the exhaust gas processor, the liquid seal has two interfaces, one interface of the liquid seal is connected to the remaining interface of the second tee, and the other interface of the liquid seal is connected to the remaining interface of the third tee, and a third valve is provided at the connection between the two, and the liquid seal is used to prevent air from entering the recovery port through the discharge port under the action of the recovery compressor.

[0011] The beneficial effect of the above technical solution is that: by providing a liquid seal, it is prevented that the outside air enters the gas leakage recovery mechanism through the exhaust gas processor and penetrates into the recovery compressor for compression and recovery.

[0012] The liquid seal member in the above technical solution is a vertically arranged U-shaped tube, the U-shaped tube is filled with liquid, and the two ends of the U-shaped tube respectively constitute its two interfaces.

[0013] The beneficial effect of the above technical solution is that a U-shaped tube is used to connect the discharge port and the air inlet of the recovery compressor, and liquid is filled in the U-shaped tube. In this way, when the recovery compressor is working, the pressure difference at both ends of the U-shaped tube causes the liquid level heights at both ends of the U-shaped tube to be inconsistent, but the liquid seal avoids the possibility of completely sealing the two to completely prohibit air from entering the recovery compressor.

[0014] The gas leakage recovery mechanism in the above technical solution also includes a regulating valve, and the regulating valve is arranged at the connection point between the second three-way connection and the liquid sealing component.

[0015] The beneficial effect of the above technical solution is that the liquid in the liquid seal can be prevented from being sucked into the recovery compressor under the action of negative pressure in a timely manner through the regulating valve.

[0016] The liquid in the above technical solution is water.

[0017] The beneficial effects of the above technical solution are: it will not volatilize and has a large density, which can avoid it.

[0018] In the above technical solution, the gas transported in the gas supply main is a combustible gas, and the exhaust gas processor is an exhaust flare.

[0019] The beneficial effect of the above technical solution is that the exhausted combustible gas can be burned to reduce pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a simplified structural diagram of a leakage gas recovery system for a dry gas seal compressor according to an embodiment of the present invention.

[0021] In the figure: 11 first three-way, 12 recovery compressor, 13 exhaust gas processor, 141 first valve, 142 second valve, 143 third valve, 15 liquid seal, 16 second three-way, 17 third three-way, 18 regulating valve, 2 main compressor. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] like Figure 1 As shown, the present embodiment provides a leakage gas recovery system for a dry gas sealed compressor, comprising a leakage recovery mechanism and a main compressor 2, wherein the main compressor 2 is provided with a dry gas seal, and the dry gas seal is provided with a leakage port, the air inlet of the main compressor 2 is connected to the air supply main pipe, and the air outlet of the main compressor 2 is connected to the air outlet main pipe, the leakage recovery mechanism has an air inlet, a recovery port and a discharge port, and the recovery port and the discharge port of the leakage recovery mechanism are selectively connected to its air inlet, the leakage port is connected to the air inlet of the leakage recovery mechanism, and the recovery port of the leakage recovery mechanism is connected to the air supply main pipe, the structure is simple, and the leaked gas of the main compressor is sent back to the main air supply pipe through the recovery port or discharged through the discharge port through the leakage recovery mechanism, so that the entire leakage recovery mechanism has diverse functions and strong adaptability, and can flexibly choose to discharge or recover the collected gas.

[0024] Among them, the main compressor 2 in the above technical scheme is provided with multiple, each of the main compressor 2 is respectively provided with a dry gas seal, and the air inlets of the multiple main compressors 2 are connected to the air supply main pipe, the air outlets of the multiple main compressors 2 are connected to the air outlet main pipe, and the multiple leakage ports are connected to the air inlet of the leakage recovery mechanism, so that the air delivery efficiency is higher.

[0025] The gas leakage recovery mechanism described in the above technical scheme includes a first tee 11, a recovery compressor 12 and an exhaust gas processor 13, the exhaust gas processor 13 has an air inlet and an air outlet, and the multiple leakage ports are connected to any one interface of the first tee 11, and the remaining one interface of the first tee 11 is connected to the air inlet of the recovery compressor 12, and a first valve 141 is provided at the connection between the two, the air outlet of the recovery compressor 12 is connected to the gas supply main pipe, and constitutes the recovery port of the gas leakage recovery mechanism, the remaining other interface of the first tee 11 is connected to the air inlet of the exhaust gas processor 13, and a second valve 142 is provided at the connection between the two, and the air outlet of the exhaust gas processor 13 constitutes the discharge port of the gas leakage recovery mechanism, and the recovery compressor and the exhaust gas processor are set to compress the collected gas through the recovery compressor for recovery or use the exhaust gas processor for harmless treatment for discharge.

[0026] The leakage recovery mechanism described in the above technical scheme also includes a liquid seal 15, a second tee 16 is provided at the connection between the first valve 141 and the air inlet of the recovery compressor 12, and a third tee 17 is provided at the connection between the second valve 142 and the air inlet of the exhaust gas processor 13. The liquid seal 15 has two interfaces, one interface of the liquid seal 15 is connected to the remaining interface of the second tee 16, and the other interface of the liquid seal 15 is connected to the remaining interface of the third tee 17, and a third valve 143 is provided at the connection between the two. The liquid seal 15 is used to prevent air from entering the recovery port through the discharge port under the action of the recovery compressor 12. The liquid seal is provided to prevent external air from entering the leakage recovery mechanism through the exhaust gas processor and infiltrating into the recovery compressor for compression and recovery.

[0027] The liquid seal 15 in the above technical solution is a vertically arranged U-shaped tube, in which liquid is filled, and the two ends of the U-shaped tube respectively constitute its two interfaces, that is, the U-shaped tube is used to connect the discharge port and the air inlet of the recovery compressor, and liquid is filled in the U-shaped tube. In this way, when the recovery compressor is working, the pressure difference at the two ends of the U-shaped tube causes the liquid level heights at the two ends of the U-shaped tube to be inconsistent, but the liquid seal avoids the possibility of completely sealing the two to completely prohibit air from entering the recovery compressor.

[0028] The gas leakage recovery mechanism in the above technical solution also includes a regulating valve 18, which is arranged at the connection point between the second three-way valve 16 and the liquid seal 15. In this way, the regulating valve can timely prevent the liquid in the liquid seal from being sucked into the recovery compressor under the action of negative pressure.

[0029] The liquid in the above technical solution is water, which does not volatilize and has a relatively high density, thus avoiding this.

[0030] The gas transported in the gas supply main in the above technical solution is a combustible gas, and the exhaust gas processor 13 is an exhaust flare, so that the exhausted combustible gas can be burned to reduce pollution to the environment.

[0031] Preferably, the combustible gas is natural gas.

[0032] Among them, when the gas leaked from the leakage port needs to be emptied and processed, the first valve and the third valve are closed, and the second valve is opened. At this time, the gas can be discharged after being processed by the exhaust gas processor. When the gas leaked from the leakage port needs to be recovered, and the total leakage amount of each leakage port is not large, the first valve and the third valve are opened, and the second valve is closed. At this time, the gas leaked from each leakage port is recovered into the gas supply main through the recovery compressor. At this time, the first gas passage between the entire first tee through the first valve, the second tee to the recovery compressor is under negative pressure, and the second gas passage between the exhaust gas processor and the liquid seal is connected to the outside world through the third tee, the third valve and the liquid seal. By setting the liquid seal, the first gas passage and the second gas passage have a hydraulic buffer function, and the liquid level difference is used to balance the pressure difference between the first gas passage and the second gas passage. In this way, air can be prevented from infiltrating into the first gas passage through the second valve due to poor airtightness of the second valve. When the total amount of leakage from each leakage port is large, the first gas passage is under positive pressure, which is greater than the normal pressure of the second gas passage. The gas breaks through the liquid seal pressure of the liquid seal and is discharged into the exhaust gas processor through the second gas passage, thereby ensuring the safe operation of the entire gas leakage recovery mechanism.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dry gas seal compressor leakage gas recovery system, characterized in that: The invention comprises a gas leakage recovery mechanism and a main compressor (2), wherein the main compressor (2) is provided with a dry gas seal, wherein a leakage port is provided at the dry gas seal, wherein the air inlet of the main compressor (2) is connected to the air supply main pipe, wherein the air outlet of the main compressor (2) is connected to the air outlet main pipe, wherein the gas leakage recovery mechanism has an air inlet, a recovery port and a discharge port, wherein the recovery port and the discharge port of the gas leakage recovery mechanism are selectively connected to the air inlet, wherein the leakage port is connected to the air inlet of the gas leakage recovery mechanism, and wherein the recovery port of the gas leakage recovery mechanism is connected to the air supply main pipe; wherein the gas leakage recovery mechanism comprises a first three-way valve (11), a recovery port and a discharge port; wherein the first three-way valve (11) and the recovery port are connected to the air supply main pipe ... A recovery compressor (12) and an exhaust gas processor (13), wherein the exhaust gas processor (13) has an air inlet and an air outlet, the leakage port is connected to any one interface of the first three-way valve (11), the remaining one interface of the first three-way valve (11) is connected to the air inlet of the recovery compressor (12), and a first valve (141) is provided at the connection point between the two, the air outlet of the recovery compressor (12) is connected to the air supply main pipe and constitutes the recovery port of the leakage recovery mechanism, the remaining other interface of the first three-way valve (11) is connected to the air inlet of the exhaust gas processor (13), and the two are connected. A second valve (142) is provided at the connection point between the first valve (141) and the air inlet of the recovery compressor (12), and a third three-way connection (17) is provided at the connection point between the second valve (142) and the air inlet of the exhaust gas processor (13). The liquid seal (15) has two interfaces, one interface of the liquid seal (15) is connected to the remaining interface of the second three-way connection (16), and the liquid seal (15) is connected to the remaining interface of the second three-way connection (16). 5) is connected to the remaining one of the third three-way connection (17), and a third valve (143) is provided at the connection point between the two. The liquid seal (15) is used to prevent air from entering the recovery port through the discharge port under the action of the recovery compressor (12); the liquid seal (15) is a vertically arranged U-shaped tube, the U-shaped tube is filled with liquid, and the two ends of the U-shaped tube respectively constitute its two interfaces; the air leakage recovery mechanism also includes a regulating valve (18), and the regulating valve (18) is provided at the connection point between the second three-way connection (16) and the liquid seal (15); the liquid is water.

2. The dry gas seal compressor leakage gas recovery system according to claim 1, characterized in that: The main compressor (2) is provided in plurality, each of the main compressors (2) is provided with a dry gas seal, and the air inlets of the plurality of main compressors (2) are connected to the air supply main pipe, the air outlets of the plurality of main compressors (2) are connected to the air outlet main pipe, and the plurality of leakage ports are connected to the air inlet of the leakage recovery mechanism.

3. The dry gas seal compressor leakage gas recovery system according to claim 1 or 2, characterized in that: The gas transported in the gas supply main is a combustible gas, and the tail gas processor (13) is an exhaust flare.

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