CN202746257U - Recovery System of Leakage Gas from Dry Gas Seal of Centrifugal Compressor - Google Patents

Recovery System of Leakage Gas from Dry Gas Seal of Centrifugal Compressor Download PDF

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Publication number
CN202746257U
CN202746257U CN 201220321064 CN201220321064U CN202746257U CN 202746257 U CN202746257 U CN 202746257U CN 201220321064 CN201220321064 CN 201220321064 CN 201220321064 U CN201220321064 U CN 201220321064U CN 202746257 U CN202746257 U CN 202746257U
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China
Prior art keywords
gas
centrifugal compressor
leakage
outlet
pipeline
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Expired - Fee Related
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CN 201220321064
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Chinese (zh)
Inventor
邵晨
范吉全
肖峰
刘燕儒
邢桂坤
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Petrochina Co Ltd
China Huanqiu Contracting and Engineering Corp
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Petrochina Co Ltd
China Huanqiu Contracting and Engineering Corp
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Priority to CN 201220321064 priority Critical patent/CN202746257U/en
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Abstract

The recovery system of the dry gas sealing leakage gas of the centrifugal compressor is characterized in that: the centrifugal compressor is provided with a sealing cavity, and a leakage port of the sealing cavity of the centrifugal compressor is a leakage outlet of the dry sealing leakage gas; a leakage port of a sealing cavity of the centrifugal compressor is connected with an inlet of the gas-liquid separator through a pipeline; the outlet of the gas-liquid separator is connected with the drainage inlet of the gas injection device through a pipeline; the working fluid outlet of the centrifugal compressor is connected with the working fluid inlet of the gas injection device through a pipeline; the outlet of the gas injection device is connected to the inlet of the buffer tank; the outlet of the buffer tank is connected with the inlet of the centrifugal compressor through a pipeline. The effect is as follows: the leakage gas can be completely recycled, and the design load of the torch is reduced.

Description

The dry gas seals of centrifugal compressor is leaked the reclaiming system of gas
Technical field
The utility model relates to the centrifugal compressor technical field of petrochemical industry, and particularly a kind of dry gas seals of centrifugal compressor is leaked the recovery of gas, is a kind of reclaiming system of dry gas seals leakage gas of centrifugal compressor.
Background technique
At present, the centrifugal compressor extensive use dry gas seals technology of petrochemical industry, namely the axle head at centrifugal compressor arranges Seal cage, and when normally moving, the leakage hole in sealing chamber becomes the leakage outlet of dry-type encapsulated leakage gas.Because the gas that centrifugal compressor compresses mostly is greatly inflammable, explosive, poisonous dangerous gas, do not allow to leak to the external world, therefore, the mode that prior art is eliminated the dry gas seals leakage gas of centrifugal compressor causes torch for the leakage hole with Seal cage by pipeline, removes thereby utilize the mode of burning will leak gas.Strengthened the Design cooling load of torch, simultaneously, prior art also is unfavorable for leaking the recycling of gas, has relatively increased the operating cost of petrochemical industry.
The model utility content
The purpose of this utility model is: a kind of reclaiming system of dry gas seals leakage gas of centrifugal compressor is provided, can recycles leakage gas fully, reduce simultaneously the Design cooling load of torch.
The technical solution adopted in the utility model is: the dry gas seals of centrifugal compressor is leaked the reclaiming system of gas, comprise centrifugal compressor, gas injection apparatus, knock out drum, gas-liquid separator, flowmeter, modulating valve, pressure detector and controller, it is characterized in that: centrifugal compressor has Seal cage, and the leakage hole of centrifugal compressor Seal cage is the leakage outlet of described dry-type encapsulated leakage gas; The leakage hole of centrifugal compressor Seal cage connects the entrance of gas-liquid separator by pipeline; The outlet of gas-liquid separator connects the drainage entrance of gas injection apparatus by pipeline; The working fluid outlet of centrifugal compressor connects the Working-fluid intaking of gas injection apparatus by pipeline; The outlet of gas injection apparatus accesses the entrance of described knock out drum; The outlet of knock out drum connects the entrance of centrifugal compressor by pipeline.On the basis of technique scheme, the utility model can also be done following improvement:
The leakage hole of centrifugal compressor Seal cage connects gas-liquid separator by flowmeter.
Described flowmeter is orifice meter.
Described gas-liquid separator is connected with pressure detector, is connected by signaling line between pressure detector and the controller; Linked to each other by signaling line between controller and the modulating valve.Pipeline at the outlet of the working fluid of centrifugal compressor and the Working-fluid intaking of gas injection apparatus is provided with modulating valve.
Described gas injection apparatus is gas ejector.
The beneficial effects of the utility model: the utility model, centrifugal compressor is compressed the gas of output as working fluid, with dry-type encapsulated leakage gas as drain fluids, like this, the higher working fluid of initial pressure just can mix in gas injection apparatus with the lower drain fluids of initial pressure, reach gradually identical speed, finally enter by knock out drum and re-start compression in the centrifugal compressor, thereby the utility model has realized that leakage gas recycles completely, this process need not to make and applies a torch to burn leakage gas, with respect to prior art, the utility model has also reduced the Design cooling load of torch.Gas-liquid separator is for separating of the gas and the liquid that leak in the gas, and knock out drum is for separating of the gas and the liquid that enter before the centrifugal compressor, thereby prevents liquid from entering gas injection apparatus and centrifugal compressor and affect the normal operation of equipment.What gas injection apparatus was realized is the exchange of pressure, speed between working fluid and the drain fluids, compresses thereby make the leakage gas of dry gas seals reenter centrifugal compressor under the drive of working fluid.
Description of drawings
Fig. 1 is the reclaiming system structural representation that the dry gas seals of the utility model centrifugal compressor is leaked gas.
Among the figure, 1 centrifugal compressor, 2-gas injection apparatus, 3-knock out drum, 4-gas-liquid separator, 5-flowmeter, 6-modulating valve, 7-pressure detector, 8-controller.
Embodiment
Embodiment 1: the reclaiming system of leaking gas take the dry gas seals of a centrifugal compressor is described in further detail the utility model as example.
Consult Fig. 1.The dry gas seals of centrifugal compressor is leaked the reclaiming system of gas, comprises centrifugal compressor 1, gas injection apparatus 2, knock out drum 3, gas-liquid separator 4, flowmeter 5, modulating valve 6, pressure detector 7 and controller 8.
Centrifugal compressor 1 has Seal cage, and the leakage hole of centrifugal compressor 1 Seal cage is the leakage outlet of described dry-type encapsulated leakage gas; The leakage hole of centrifugal compressor 1 Seal cage connects gas-liquid separator 4 by pipeline connection traffic meter 5.Described flowmeter 5 is orifice meters.The outlet of flowmeter 5 connects the entrance of gas-liquid separator 4.
The outlet of gas-liquid separator 4 connects the drainage entrance of gas injection apparatus 2 by pipeline.Described gas injection apparatus 2 is gas ejector.The working fluid outlet of centrifugal compressor 1 connects the Working-fluid intaking of gas injection apparatus 2 by pipeline.The outlet of gas injection apparatus 2 accesses the entrance of described knock out drum 3; The outlet of knock out drum connects the entrance of centrifugal compressor 1 by pipeline.
Described gas-liquid separator 4 is connected with pressure detector 7, is connected by signaling line between pressure detector 7 and the controller 8; Linked to each other by signaling line between controller 8 and the modulating valve 6.Pipeline at the outlet of the working fluid of centrifugal compressor 1 and the Working-fluid intaking of gas injection apparatus 2 is provided with modulating valve.
Centrifugal compressor 1 compression and a part of pressurized gas of output just use as the working fluid in the utility model, this working fluid and above-mentioned drain fluids are carried out the exchange of pressure, speed, thus the equilibrium of realization pressure, speed.The outlet of gas injection apparatus 2 access knock out drum 3 exports to and carries out gas-liquid separation in the knock out drum 3 thereby working fluid is mixed afterwards the fluid-mixing of formation with drain fluids, prevents that centrifugal compressor 1 is impaired because of the input of liquid.The entrance of the outlet access centrifugal compressor 1 of knock out drum 3, thus realized the fully recycling that dry gas seals is leaked gas.Gas injection apparatus 2 is to realize the pressure of working fluid and drain fluids and the device of speed exchange, and its a kind of way of realization is gas ejector, and another kind of way of realization is compressor.Take gas ejector as example, be briefly described as follows to the working principle of gas injection apparatus 2: gas ejector comprises nozzle, receiving chamber, explosion chamber and mixing chamber etc.; Nozzle is as Working-fluid intaking, and it links to each other by pipeline with the working fluid outlet of centrifugal compressor 1; Receiving chamber links to each other with the pipeline that is connected gas-liquid separator 4 outlets with nozzle respectively, be used for receiving working fluid and drain fluids, the outlet of receiving chamber links to each other with the explosion chamber that shrinks shape, like this, initial pressure and speed all higher working fluid just successively in receiving chamber, explosion chamber with initial pressure and speed all lower drain fluids contact, carry out the exchange of energy and speed, energy and the speed of working fluid pass to drain fluids, and the pressure of self and speed all descend to some extent, simultaneously, the pressure of drain fluids and speed all increase; The end of explosion chamber (being the end of contraction flow region) links to each other with the mixing chamber of expansion shape, and in explosion chamber, it is balanced that the speed of working fluid and drain fluids reaches gradually, becomes fluid-mixing.Explosion chamber accesses again knock out drum 3, thereby fluid-mixing is exported in the knock out drum 3.The utility model compresses the gas of output as working fluid with centrifugal compressor, with dry-type encapsulated leakage gas as drain fluids, like this, the higher working fluid of initial pressure just can mix in gas injection apparatus with the lower drain fluids of initial pressure, reach gradually identical speed, finally enter by knock out drum and re-start compression in the centrifugal compressor, thereby the utility model realized that leakage gas recycles completely, reduced the operation cost of petrochemical industry.This process need not to make and applies a torch to burn leakage gas, and with respect to prior art, the utility model has also reduced the Design cooling load of torch.Gas-liquid separator is for separating of the gas and the liquid that leak in the gas, and knock out drum is for separating of the gas and the liquid that enter before the centrifugal compressor, thereby prevents liquid from entering gas injection apparatus and centrifugal compressor and affect the normal operation of equipment.What gas injection apparatus was realized is the exchange of pressure, speed between working fluid and the drain fluids, compresses thereby make the leakage gas of dry gas seals reenter centrifugal compressor under the drive of working fluid.It is recycling the leakage gas of dry gas seals to be recycled to centrifugal compressor, has also improved energy utilization rate, has avoided the loss of gas, has reduced environmental pollution, has good economy and environmental benefit.
Utilize the front and back pressure reduction of orifice plate to determine that centrifugal compressor 1 leaks the flow (being leakage rate) of gas; when flow is very large; centrifugal compressor 1 need to be shut down maintenance, because the dry gas seals of centrifugal compressor 1 is damaged at this moment, not have the purpose of sealing fully.
On the pipeline of the working fluid outlet that connects centrifugal compressor 1 and the Working-fluid intaking of gas injection apparatus 2, also be provided with modulating valve 6, thereby realized the pressure control function of working fluid, the ratio that has further facilitated working fluid and drain fluids regulates, and guaranteed the coupling of the two pressure, speed.Further, the utility model can also comprise the pressure detector 7 that detects gas-liquid separator 4 air pressure inside and the controller 8 that links to each other with pressure detector 7.This controller 8 also links to each other with modulating valve 6, the control of the controlled device 8 of the aperture of this modulating valve 6.Like this, if the pressure that pressure detector 7 detects in the gas-liquid separator 4 is higher, illustrate that the leakage rate of leaking gas is larger, then controller 8 will increase the aperture of modulating valve 6, to improve the input quantity of working fluid in the gas injection apparatus 2, the fully recycling that guarantees to leak gas; Otherwise, detect gas-liquid separator 4 internal pressures when low at pressure detector 7, controller 8 reduces the aperture of modulating valve 6, to reduce the input quantity of working fluid in the gas injection apparatus 2, thereby both guaranteed to leak the fully recycling of gas, prevented again the waste of working fluid.

Claims (5)

1.一种离心式压缩机的干气密封泄漏气的回收系统，包括离心式压缩机(1)、气体喷射装置(2)、缓冲罐(3)、气液分离器(4)、流量计(5)、调节阀(6)、压力检测器(7)和控制器(8)，其特征在于：离心式压缩机(1)有密封腔，离心式压缩机(1)密封腔的泄漏口即为所述干式密封泄漏气的泄漏出口；离心式压缩机(1)密封腔的泄漏口通过管线连接气液分离器(4)的入口；气液分离器(4)的出口通过管线连接气体喷射装置(2)的引流入口；离心式压缩机(1)的工作流体出口通过管线连接气体喷射装置(2)的工作流体入口；气体喷射装置(2)的出口接入所述缓冲罐(3)的入口；缓冲罐的出口通过管线连接离心式压缩机(1)的入口。 1. A recovery system for dry gas seal leakage gas of a centrifugal compressor, comprising a centrifugal compressor (1), a gas injection device (2), a buffer tank (3), a gas-liquid separator (4), and a flow meter (5), regulating valve (6), pressure detector (7) and controller (8), it is characterized in that: centrifugal compressor (1) has sealing cavity, and the leakage port of centrifugal compressor (1) sealing cavity It is the leakage outlet of the dry seal leakage gas; the leakage outlet of the sealed chamber of the centrifugal compressor (1) is connected to the inlet of the gas-liquid separator (4) through a pipeline; the outlet of the gas-liquid separator (4) is connected through a pipeline The diversion inlet of the gas injection device (2); the working fluid outlet of the centrifugal compressor (1) is connected to the working fluid inlet of the gas injection device (2) through a pipeline; the outlet of the gas injection device (2) is connected to the buffer tank ( 3) inlet; the outlet of the buffer tank is connected to the inlet of the centrifugal compressor (1) through a pipeline. 2.根据权利要求1所述的离心式压缩机的干气密封泄漏气的回收系统，其特征是：离心式压缩机(1)密封腔的泄漏口通过流量计(5)连接气液分离器(4)。 2. The recovery system of the dry gas seal leakage gas of the centrifugal compressor according to claim 1, characterized in that: the leakage port of the sealed chamber of the centrifugal compressor (1) is connected to the gas-liquid separator through a flow meter (5) (4). 3.根据权利要求2所述的离心式压缩机的干气密封泄漏气的回收系统，其特征是：所述流量计(5)是孔板流量计。 3. The system for recovering the leakage gas of the dry gas seal of the centrifugal compressor according to claim 2, characterized in that: the flow meter (5) is an orifice flow meter. 4.根据权利要求1或2所述的离心式压缩机的干气密封泄漏气的回收系统，其特征是：所述气液分离器(4)连接有压力检测器(7)，压力检测器(7)与控制器(8)之间由信号线连接；控制器(8)与调节阀(6)之间由信号线相连；在离心式压缩机(1)的工作流体出口与气体喷射装置(2)的工作流体入口的管线上设有调节阀。 4. The recovery system of the dry gas seal leakage gas of the centrifugal compressor according to claim 1 or 2, characterized in that: the gas-liquid separator (4) is connected with a pressure detector (7), and the pressure detector (7) is connected with the controller (8) by a signal line; between the controller (8) and the regulating valve (6) is connected by a signal line; between the working fluid outlet of the centrifugal compressor (1) and the gas injection device (2) A regulating valve is provided on the pipeline of the working fluid inlet. 5.根据权利要求1、2或3所述的离心式压缩机的干气密封泄漏气的回收系统，其特征是：所述气体喷射装置(2)为气体喷射器。  5. The leakage gas recovery system of the dry gas seal of the centrifugal compressor according to claim 1, 2 or 3, characterized in that: the gas injection device (2) is a gas injection device. the
CN 201220321064 2012-07-04 2012-07-04 Recovery System of Leakage Gas from Dry Gas Seal of Centrifugal Compressor Expired - Fee Related CN202746257U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104033412A (en) * 2014-05-30 2014-09-10 东华工程科技股份有限公司 Device for discharging liquid in inlet separator of refrigerant compressor unit
CN106460822A (en) * 2014-06-27 2017-02-22 株式会社神户制钢所 Gas compression device
CN111470464A (en) * 2019-03-19 2020-07-31 国铠惰封装备股份有限公司 Circulating inert sealing system based on energy storage injection device and QHSE storage and transportation method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104033412A (en) * 2014-05-30 2014-09-10 东华工程科技股份有限公司 Device for discharging liquid in inlet separator of refrigerant compressor unit
CN106460822A (en) * 2014-06-27 2017-02-22 株式会社神户制钢所 Gas compression device
CN106460822B (en) * 2014-06-27 2018-09-04 株式会社神户制钢所 gas compression device
CN111470464A (en) * 2019-03-19 2020-07-31 国铠惰封装备股份有限公司 Circulating inert sealing system based on energy storage injection device and QHSE storage and transportation method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130220

Termination date: 20210704

CF01 Termination of patent right due to non-payment of annual fee