CN111778060A - Oil gas recovery device and recovery method for cooling and saving energy by using excess pressure - Google Patents
Oil gas recovery device and recovery method for cooling and saving energy by using excess pressure Download PDFInfo
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- 238000011084 recovery Methods 0.000 title claims abstract description 59
- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 17
- 239000007789 gas Substances 0.000 claims abstract description 94
- 238000001179 sorption measurement Methods 0.000 claims abstract description 77
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 230000018044 dehydration Effects 0.000 claims abstract description 35
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 35
- 239000002912 waste gas Substances 0.000 claims abstract description 33
- 238000003795 desorption Methods 0.000 claims abstract description 19
- 239000007792 gaseous phase Substances 0.000 claims abstract description 3
- 239000007791 liquid phase Substances 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 20
- 230000008929 regeneration Effects 0.000 claims description 16
- 238000011069 regeneration method Methods 0.000 claims description 16
- 229930195733 hydrocarbon Natural products 0.000 claims description 10
- 150000002430 hydrocarbons Chemical class 0.000 claims description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 239000002808 molecular sieve Substances 0.000 claims description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/02—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas with solid adsorbents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/06—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
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- General Chemical & Material Sciences (AREA)
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- Separation Of Gases By Adsorption (AREA)
Abstract
The utility model provides an utilize energy-conserving vapor recovery unit of residual pressure cooling, including the heat exchanger, dehydration mechanism, the expander, gas-liquid separator, adsorption mechanism and the oil storage tank that is used for saving the liquefied oil gas of retrieving, external waste gas input pipeline of the hot entrance point of heat exchanger and desorption pipeline, the hot exit end of heat exchanger and dehydration mechanism's entrance point intercommunication, dehydration mechanism's exit end and expander's entrance point intercommunication, the exit end of expander and gas-liquid separator's entrance point intercommunication, gas-liquid separator's gaseous phase exit end and the cold entrance point intercommunication of heat exchanger, gas-liquid separator's liquid phase exit end and oil storage tank intercommunication, the cold exit end of heat exchanger and adsorption mechanism's input intercommunication, adsorption mechanism's adsorption end passes through the cold entrance point intercommunication of vacuum pump with the heat exchanger, adsorption. The device can utilize the kinetic energy and the cold energy of medium and high pressure waste gas excess pressure conversion to carry out vapor recovery, can reduce device operation energy consumption by a wide margin, practices thrift equipment investment, reduces exhaust emission concentration.
Description
Technical Field
The invention relates to the technical field of oil gas recovery, in particular to an energy-saving oil gas recovery device utilizing residual pressure cooling, and further relates to a recovery method of the energy-saving oil gas recovery device utilizing residual pressure cooling.
Background
The oil gas recovery treatment method mainly comprises an adsorption method, an absorption method, a condensation method, a membrane treatment and the like; the methods have the defects of low oil gas recovery efficiency, high oil gas emission concentration, high energy consumption, short service life, high investment cost, poor safety performance and the like.
At present, the oil gas recovery adopts the method of condensation and adsorption integration, firstly, the oil gas is condensed to a certain degree, most of hydrocarbon in the oil gas is liquefied, and then, activated carbon or resin is used for deep adsorption, the oil gas recovery efficiency of the condensation and adsorption integration process is high, and the standard emission of waste gas can be realized.
However, the currently adopted condensation and adsorption integrated method basically adopts a compressor for refrigeration, so that the energy consumption is high, and the refrigerant also has environmental and safety problems generally; for medium and high pressure oil gas recovery, two methods of reducing pressure by a pressure regulating valve and improving the pressure grade of equipment are mainly adopted, so that the pressure energy of the oil gas is wasted, the equipment cost is increased, and the medium and high pressure oil gas has leakage hidden danger.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art, and provides an oil gas recovery device which can utilize residual pressure cooling to recover oil gas, has low energy consumption in the oil gas recovery process, and solves the problem that the pressure waste generated in the oil gas recovery process can increase the recovery equipment cost.
The invention also provides a recovery method of the oil gas recovery device, which utilizes the residual pressure to cool and save energy.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to an oil gas recovery device using residual pressure for cooling and energy saving, which comprises a heat exchanger, a dehydration mechanism and an expander, the gas-liquid separator, the oil storage tank of adsorption mechanism and liquefied oil gas that is used for the storage to retrieve, external waste gas input pipeline of the hot entrance point of heat exchanger and desorption pipeline, the hot exit end of heat exchanger and the entrance point intercommunication of dehydration mechanism, the exit end of dehydration mechanism and the entrance point intercommunication of expander, the exit end of expander and gas-liquid separator's entrance point intercommunication, gas-liquid separator's gaseous phase exit end and the cold entrance point intercommunication of heat exchanger, gas-liquid separator's liquid phase exit end and oil storage tank intercommunication, the cold exit end of heat exchanger and adsorption mechanism's input intercommunication, adsorption mechanism's adsorption end intercommunication has the vacuum pump that is used for adsorption mechanism vacuum desorption regeneration, the desorption end and the desorption pipeline intercommunication of vacuum pump, adsorption mechanism's exit end connects the exhaust chimney.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the oil gas recovery device which utilizes residual pressure for cooling and energy saving, an oil discharge pipeline is also communicated with a hot cavity of the heat exchanger and is communicated with an oil storage tank, and an oil discharge control valve is arranged on the oil discharge pipeline.
The technical problem to be solved by the present invention can be further solved by the following technical scheme that, for the oil gas recovery device using residual pressure for cooling and energy saving, the dehydration mechanism comprises two dehydration pipelines which are arranged in parallel, each dehydration pipeline is provided with a regeneration adsorption type dryer and dehydration control valves arranged on two sides of the regeneration adsorption type dryer, and the regeneration adsorption type dryer adopts a molecular sieve as a drying agent.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the oil gas recovery device which utilizes residual pressure for cooling and energy saving, a heating pipeline is also communicated with the dehydration pipeline, and a heater is arranged on the heating pipeline.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the oil gas recovery device which utilizes residual pressure for cooling and energy saving, the expansion machine is connected with a vacuum pump shaft.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the oil gas recovery device which utilizes residual pressure for cooling and energy saving, an oil outlet pipeline is communicated with an oil storage tank, and an oil outlet pump is arranged on the oil outlet pipeline.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the oil gas recovery device utilizing residual pressure for cooling and energy saving, the adsorption mechanism comprises two adsorption pipelines which are arranged in parallel, and an activated carbon adsorption tank and adsorption control valves which are arranged on two sides of the activated carbon adsorption tank are communicated on the adsorption pipelines.
The technical problem to be solved by the invention can be further realized by the following technical scheme, and for the oil gas recovery device utilizing residual pressure for cooling and energy saving, the oil gas recovery method utilizing residual pressure for cooling and energy saving comprises the following steps:
(1) waste gas enters a heat exchanger through a waste gas input pipeline to exchange heat and cool, and then is sent to a dehydration mechanism to be dehydrated;
(2) sending the dehydrated waste gas into an expansion machine for decompression and cooling, and then sending the waste gas into a gas-liquid separator for gas-liquid separation to obtain liquid hydrocarbon and lean oil gas;
(3) liquid hydrocarbon is sent into an oil storage tank for recovery, lean oil gas is sent into a heat exchanger for heat exchange with newly input waste gas, and then is sent into an adsorption mechanism for adsorption treatment;
(4) the adsorbed lean oil gas is sent into an exhaust pipeline to be discharged outwards, meanwhile, a vacuum pump carries out vacuum desorption on an adsorption mechanism, and the lean oil gas adsorbed by the adsorption mechanism and newly input waste gas are sent back into a heat exchanger to be treated again;
(5) the oil gas in the waste gas is recycled in such a way.
Compared with the prior art, the invention has the following beneficial effects:
1. the cold energy after the oil gas is depressurized is fully utilized and used for condensing and recovering the oil gas, and the expansion machine is connected with the vacuum pump, so that the energy consumption required by oil gas recovery device equipment is reduced, and the problem of equipment cost during oil gas recovery is solved;
2. the automatic control degree is high, the reliability is high, the operation is simple, and the maintenance is convenient;
3. the expansion machine and the vacuum pump are mainly used for cold pressing, and a refrigeration compressor is not used, so that the energy consumption of equipment operation is greatly reduced;
4. the oil gas is firstly recovered by cooling the heat exchanger, secondarily recovered by cooling the oil gas by the expansion machine, and thirdly recovered by active carbon adsorption, so that the recovery rate of the oil gas is improved, the economic benefit of recovery equipment is enhanced, and the recovered liquid oil is stored in the oil storage tank, is visual and can be directly recycled;
5. the recovered oil gas is in the low temperature state, and the oil gas of low temperature state is difficult to burn, and the expander can be interlocked through the quick action emergency valve at the during operation, has guaranteed the security when oil gas retrieves.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an energy-saving oil gas recovery device using residual pressure cooling comprises a heat exchanger 2, a dehydration mechanism 3, an expander 5, a gas-liquid separator 7, an adsorption mechanism 8 and an oil storage tank 10 for storing recovered liquefied oil gas, wherein a hot inlet end of the heat exchanger 2 is externally connected with a waste gas input pipeline 1 and a desorption pipeline, a hot outlet end of the heat exchanger 2 is communicated with an inlet end of the dehydration mechanism 3, an outlet end of the dehydration mechanism 3 is communicated with an inlet end of the expander 5, an outlet end of the expander 5 is communicated with an inlet end of the gas-liquid separator 7, a gas outlet end of the gas-liquid separator 7 is communicated with a cold inlet end of the heat exchanger 2, a liquid outlet end of the gas-liquid separator 7 is communicated with the oil storage tank 10, a cold outlet end of the heat exchanger 2 is communicated with an input end of the adsorption mechanism 8, and an, the desorption end of the vacuum pump 6 is communicated with a desorption pipeline, and the outlet end of the adsorption mechanism 8 is externally connected with an exhaust chimney through an exhaust pipeline 9. The oil gas cooling and cooling device has the advantages that the oil gas is subjected to primary recovery through the heat exchanger 2, the oil gas is subjected to secondary recovery through the expansion machine 5, and the oil gas is adsorbed by the adsorption mechanism 8 for tertiary recovery, so that the recovery rate of the oil gas is improved, the economic benefit of the recovery device is enhanced, the recovered liquid oil is stored in the oil storage tank 10, is visual and visible, and can be directly recycled; and the discharged waste gas reaches the GB31570 new national standard that the oil gas content is lower than 120mg/Nm 3; in the heat exchanger 2, the gas-phase oil gas with lower temperature separated by the gas-liquid separator 7 is used for heat exchange and cooling of the newly input waste gas, and no external cold energy is required to be transmitted; the dehydration mechanism 3 can dehydrate the cooled waste gas, the dehydration degree can reach below 3ppm, the expander 5 does work, the pressure of the waste gas can be reduced to 20KPa to 0.2MPa, the temperature is reduced to-50 to-70 ℃, the discharged waste gas is subjected to gas-liquid separation through a gas-liquid separation tank, and the separated waste gas is divided into liquid hydrocarbon and lean oil gas; the liquid hydrocarbon enters a recovered oil storage tank and is convenient to convey to a specified place; the lean oil gas enters the heat exchanger 2 for heat exchange and then enters the adsorption mechanism 8, the lean oil gas further removes light hydrocarbons through the adsorption mechanism 8, and the lean oil gas reaches the emission standard and is conveyed to a high-emission exhaust chimney with the length of 15m through an exhaust pipeline 9 to be discharged outwards; secondly, the vacuum pump 6 can be used for carrying out vacuum desorption regeneration on the adsorption mechanism 8, so that the service life of the adsorption mechanism 8 is prolonged; the vacuum pump 6 may be a screw vacuum pump 6 of the prior art.
An oil discharge pipeline is communicated with the hot cavity of the heat exchanger 2 and is communicated with the oil storage tank 10, and an oil discharge control valve is installed on the oil discharge pipeline. The oil discharge pipeline is arranged to output the liquid oil gas reserved in the heat exchanger 2 to the oil storage tank 10, so that the oil gas is cooled and recovered.
The dehydration mechanism 3 comprises two dehydration pipelines which are arranged in parallel, each dehydration pipeline is provided with a regeneration adsorption type dryer and dehydration control valves which are arranged at two sides of the regeneration adsorption type dryer, and the regeneration adsorption type dryer adopts a molecular sieve as a drying agent. The two regenerative adsorption dryers are matched with each other for use, and can be used simultaneously or independently; the dehydration degree of the regeneration adsorption dryer can reach below 3ppm, and the operation period of the regeneration adsorption dryer is 8 hours; in one operation period, the heating regeneration time is 7 hours, and the unheated cold blowing time is 1 hour.
The dehydration pipeline is also communicated with a heating pipeline, and a heater 4 is arranged on the heating pipeline. The heater 4 is provided to heat the exhaust gas from the dehydration device, thereby further improving the dehydration effect.
The expansion machine 5 is connected with the vacuum pump 6 shaft, the shaft of the expansion machine 5 is in transmission connection with the vacuum pump 6 shaft, when the expansion machine 5 acts, the vacuum pump 6 can be driven to act simultaneously, and energy consumption required by equipment in oil gas recovery is reduced.
An oil outlet pipe is connected to the oil storage tank 10, and an oil pump 11 is installed on the oil outlet pipe to output the recovered oil gas stored in the oil storage tank 10 to the outside.
The adsorption mechanism 8 comprises two adsorption pipelines which are arranged in parallel, and the adsorption pipelines are communicated with an active carbon adsorption tank and adsorption control valves which are arranged on two sides of the active carbon adsorption tank. Two activated carbon adsorption tubes cooperate and use, adsorb the desorption in turn, when an activated carbon adsorption jar adsorbs, can carry out vacuum desorption to another activated carbon adsorption jar and handle, utilize 5 output kinetic energy of expander to drive vacuum pump 6 and carry out activated carbon vacuum desorption regeneration.
An oil gas recovery method using residual pressure cooling energy conservation comprises the following steps:
(1) waste gas enters a heat exchanger through a waste gas input pipeline to exchange heat and cool, and then is sent to a dehydration mechanism to be dehydrated;
(2) sending the dehydrated waste gas into an expansion machine for decompression and cooling, and then sending the waste gas into a gas-liquid separator for gas-liquid separation to obtain liquid hydrocarbon and lean oil gas;
(3) liquid hydrocarbon is sent into an oil storage tank for recovery, lean oil gas is sent into a heat exchanger for heat exchange with newly input waste gas, and then is sent into an adsorption mechanism for adsorption treatment;
(4) the adsorbed lean oil gas is sent into an exhaust pipeline to be discharged outwards, meanwhile, a vacuum pump carries out vacuum desorption on an adsorption mechanism, and the lean oil gas adsorbed by the adsorption mechanism and newly input waste gas are sent back into a heat exchanger to be treated again;
(5) the oil gas in the waste gas is recycled in such a way.
The application has the advantages that:
1. the cold energy after the oil gas is depressurized is fully utilized and used for condensing and recovering the oil gas, and the expansion machine is connected with the vacuum pump, so that the energy consumption required by oil gas recovery device equipment is reduced, and the problem of equipment cost during oil gas recovery is solved;
2. the automatic control degree is high, the reliability is high, the operation is simple, and the maintenance is convenient;
3. the expansion machine and the vacuum pump are mainly used for cold pressing, and a refrigeration compressor is not used, so that the energy consumption of equipment operation is greatly reduced;
4. the oil gas is firstly recovered by cooling the heat exchanger, secondarily recovered by cooling the oil gas by the expansion machine, and thirdly recovered by active carbon adsorption, so that the recovery rate of the oil gas is improved, the economic benefit of recovery equipment is enhanced, and the recovered liquid oil is stored in the oil storage tank, is visual and can be directly recycled;
5. the recovered oil gas is in the low temperature state, and the oil gas of low temperature state is difficult to burn, and the expander can be interlocked through the quick action emergency valve at the during operation, has guaranteed the security when oil gas retrieves.
Claims (8)
1. The utility model provides an utilize energy-conserving vapor recovery system device of excess pressure cooling which characterized in that: the device includes the heat exchanger, dehydration mechanism, the expander, gas-liquid separator, the oil storage tank of adsorption mechanism and the liquefied oil gas that is used for saving the recovery, external waste gas input pipeline of the hot entrance point of heat exchanger and desorption pipeline, the hot exit end of heat exchanger and dehydration mechanism's entrance point intercommunication, dehydration mechanism's exit end and expander's entrance point intercommunication, the exit end of expander and gas-liquid separator's entrance point intercommunication, gas-liquid separator's gaseous phase exit end and the cold entrance point intercommunication of heat exchanger, gas-liquid separator's liquid phase exit end and oil storage tank intercommunication, the cold exit end of heat exchanger and adsorption mechanism's input intercommunication, adsorption mechanism's adsorption end intercommunication has the vacuum pump that is used for adsorption mechanism vacuum desorption regeneration, the desorption end and the desorption pipeline intercommunication of vacuum pump, adsorption mechanism's exit end connects the exhaust.
2. The oil-gas recovery device using residual pressure cooling for energy saving according to claim 1, characterized in that: an oil discharge pipeline is communicated with the oil storage tank, and an oil discharge control valve is installed on the oil discharge pipeline.
3. The oil-gas recovery device using residual pressure cooling for energy saving according to claim 1, characterized in that: the dehydration mechanism comprises two dehydration pipelines which are connected in parallel, each dehydration pipeline is provided with a regeneration adsorption type dryer and dehydration control valves which are arranged on two sides of the regeneration adsorption type dryer, and the regeneration adsorption type dryer adopts a molecular sieve as a drying agent.
4. The oil-gas recovery device using residual pressure cooling for energy saving according to claim 3, characterized in that: the dehydration pipeline is also communicated with a heating pipeline, and a heater is arranged on the heating pipeline.
5. The oil-gas recovery device using residual pressure cooling for energy saving according to claim 1, characterized in that: the expansion machine is connected with the vacuum pump shaft.
6. The oil-gas recovery device using residual pressure cooling for energy saving according to claim 1, characterized in that: an oil outlet pipeline is communicated with the oil storage tank, and an oil outlet pump is installed on the oil outlet pipeline.
7. The oil-gas recovery device using residual pressure cooling for energy saving according to claim 1, characterized in that: the adsorption mechanism comprises two adsorption pipelines which are arranged in parallel, and the adsorption pipelines are communicated with an active carbon adsorption tank and adsorption control valves which are arranged on two sides of the active carbon adsorption tank.
8. An oil gas recovery method using residual pressure for cooling and energy saving is characterized in that: the method uses the oil gas recovery device which utilizes residual pressure cooling and saves energy as claimed in any one of claims 1 to 7, and comprises the following steps:
(1) waste gas enters a heat exchanger through a waste gas input pipeline to exchange heat and cool, and then is sent to a dehydration mechanism to be dehydrated;
(2) sending the dehydrated waste gas into an expansion machine for decompression and cooling, and then sending the waste gas into a gas-liquid separator for gas-liquid separation to obtain liquid hydrocarbon and lean oil gas;
(3) liquid hydrocarbon is sent into an oil storage tank for recovery, lean oil gas is sent into a heat exchanger for heat exchange with newly input waste gas, and then is sent into an adsorption mechanism for adsorption treatment;
(4) the adsorbed lean oil gas is sent into an exhaust pipeline to be discharged outwards, meanwhile, a vacuum pump carries out vacuum desorption on an adsorption mechanism, and the lean oil gas adsorbed by the adsorption mechanism and newly input waste gas are sent back into a heat exchanger to be treated again;
(5) the oil gas in the waste gas is recycled in such a way.
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| CN113008481A (en) * | 2021-03-02 | 2021-06-22 | 珠海格力智能装备有限公司 | Heat exchanger detection equipment |
| CN115140452A (en) * | 2021-03-31 | 2022-10-04 | 中国石油化工股份有限公司 | An oil gas recovery device System and method |
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| CN113008481A (en) * | 2021-03-02 | 2021-06-22 | 珠海格力智能装备有限公司 | Heat exchanger detection equipment |
| CN115140452A (en) * | 2021-03-31 | 2022-10-04 | 中国石油化工股份有限公司 | An oil gas recovery device System and method |
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