CN110345707A - A kind of multi-stage condensing system and multi-stage condensing method for petroleum vapor recovery - Google Patents
A kind of multi-stage condensing system and multi-stage condensing method for petroleum vapor recovery Download PDFInfo
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- CN110345707A CN110345707A CN201910574443.4A CN201910574443A CN110345707A CN 110345707 A CN110345707 A CN 110345707A CN 201910574443 A CN201910574443 A CN 201910574443A CN 110345707 A CN110345707 A CN 110345707A
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- 238000011084 recovery Methods 0.000 title claims abstract description 28
- 239000003208 petroleum Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims abstract description 97
- 238000009833 condensation Methods 0.000 claims abstract description 34
- 230000005494 condensation Effects 0.000 claims abstract description 34
- 239000007788 liquid Substances 0.000 claims description 152
- 239000000203 mixture Substances 0.000 claims description 20
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical group CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 6
- 239000001294 propane Substances 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0201—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using only internal refrigeration means, i.e. without external refrigeration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/02—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using water or other liquid as the cooling medium
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of multi-stage condensing system for petroleum vapor recovery, which includes that recycle stream is connected with the level-one condensing unit of the first refrigerant and B-grade condensation unit, recycle stream are connected with the three-level condensing unit of second refrigerant.A kind of multi-stage condensing system for petroleum vapor recovery of the invention, pass through the mutual cooperation of level-one condensing unit, B-grade condensation unit and three-level condensing unit, it can guarantee refrigerating efficiency under the premise of reducing system complexity and compressor usage quantity, and the system structure is simple, it is easy to operate；Multi-stage condensing method based on the multi-stage condensing system, step is simple, easy to operate, efficiently can carry out condensing recovery to oil gas.
Description
Technical field
The present invention relates to petroleum vapor recovery fields, and in particular to a kind of multi-stage condensing system and multistage for petroleum vapor recovery is cold
Solidifying method.
Background technique
With the enhancing of people's environmental protection and awareness of saving energy, petroleum vapor recovery problem is increasingly paid close attention to, one side of petroleum vapor recovery
Face can reduce discharge of the oil gas into atmosphere, reduce the pollution to environment；On the other hand the oil gas recycled is handled
Afterwards, it can continue to come into operation, save cost, create value.And in petroleum vapor recovery special equipment, condensation method oil gas returns
Receiving apparatus is most widely used, and technology is most mature, mainly carries out condensing recovery to oil gas using Multi-stage cooling currently on the market.
For general oil gas, the oil gas condensation of the overwhelming majority can be recycled for liquid after carrying out three-level cooling,
Just need to correspond to high, medium and low three-level cryogenic temperature using three-level cooling.In the prior art, high temperature refrigerator group can be configured
One individual refrigeration unit, unit are freezed using single compressor；For medium temperature refrigeration unit, in order to improve refrigeration effect
Rate can configure two compressors and carry out high-low pressure with beating；For cryogenic refrigerating system, using cascade refrigeration unit, high temperature system
Effect of the cold group as just condensation low-temperature refrigerant.Such three-level condensed oil-gas recovery system at least needs 5 to 7 pressures
Contracting machine is run simultaneously, higher cost, and needs matched component very much, and structure is complex.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of multi-stage condensing system for petroleum vapor recovery
System, the multi-stage condensing system reduce the usage quantity of compressor, and save the cost while ensure that refrigerating efficiency；And the system
Structure is simple, easy to operate.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of multi-stage condensing system for petroleum vapor recovery, the multi-stage condensing system include that recycle stream is connected with the first refrigerant
Level-one condensing unit and B-grade condensation unit, recycle stream are connected with the three-level condensing unit of second refrigerant,
The level-one condensing unit includes the first compressor, the second compressor, First Heat Exchanger, first throttle valve being sequentially communicated
And second heat exchanger, the First Heat Exchanger have the first heat exchanger channels I and the first heat exchanger channels II, second heat exchanger
With the second heat exchanger channels I and the second heat exchanger channels II, the both ends the first heat exchanger channels I respectively with second compressor
Gas outlet is connected with the first throttle valve, the both ends the second heat exchanger channels I respectively with the first throttle valve and described
The air inlet of second compressor is connected；
The B-grade condensation unit includes the third heat exchanger being sequentially communicated, second throttle, the first gas-liquid separator and
Four heat exchangers, the third heat exchanger have third heat exchanger channels I and third heat exchanger channels II, and the 4th heat exchanger has the
Four heat exchanger channels I and the 4th heat exchanger channels II, the both ends third heat exchanger channels I are separate with the first heat exchanger channels I respectively
One end of second compressor is connected with the second throttle, and the both ends the 4th heat exchanger channels I are respectively with described
The import of one gas-liquid separator is connected with liquid outlet, the gas vent of first gas-liquid separator and first compression
The air inlet of machine is connected；
The three-level condensing unit includes the 5th heat exchanger being sequentially communicated, third throttle valve, the second gas-liquid separator and
Six heat exchangers, the 5th heat exchanger have the 5th heat exchanger channels I and the 5th heat exchanger channels II, and the 6th heat exchanger has the
Six heat exchanger channels I and the 6th heat exchanger channels II, the 6th heat exchanger channels I both ends respectively with second gas-liquid separator into
Mouth is connected with liquid outlet；
The multi-stage condensing system further includes the third compressor being sequentially communicated and the 7th heat exchanger and is connected to the third
Fourth throttle valve of the heat exchanger channels I far from described one end first heat exchanger channels I, the 7th heat exchanger have the 7th heat exchanger channels
The both ends I and the 7th heat exchanger channels II, the 5th heat exchanger channels I respectively with the gas vent of second gas-liquid separator and institute
The air inlet for stating third compressor is connected, and the both ends the 5th heat exchanger channels II are separate with the 7th heat exchanger channels I respectively
One end of the third compressor is connected with the third throttle valve, the other end of the 7th heat exchanger channels I and described the
The gas outlet of three compressors is connected, and the both ends the 7th heat exchanger channels II are pressed with the 4th throttle valve and described first respectively
The air inlet of contracting machine is connected；
Wherein, oil gas passes sequentially through the second heat exchanger channels II, the 4th heat exchanger channels II and the 6th heat exchange is logical
Road II completes the heat exchange with first refrigerant and the second refrigerant.
Preferably, the multi-stage condensing system further includes being connected to the first heat exchanger channels I far from second compression
5th throttle valve of machine one end, the both ends third heat exchanger channels II respectively with the 5th throttle valve and second compressor
Air inlet be connected.
Preferably, in the first heat exchanger channels II be equipped with cooling water, for in the first heat exchanger channels I described in
First refrigerant heat exchanger.
Preferably, there are two the 4th heat exchangers, and the 4th heat exchanger described in two is in parallel setting.
Preferably, there are two the 6th heat exchangers, and the 6th heat exchanger described in two is in parallel setting.
It is a further object to provide a kind of multi-stage condensing method for petroleum vapor recovery, this method is based on above-mentioned
Multi-stage condensing system realize that step is simple, easy to operate, condensing recovery efficiently can be carried out to oil gas.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of multi-stage condensing method for petroleum vapor recovery, the multi-stage condensing method based on above-mentioned multi-stage condensing system,
The multi-stage condensing method includes the following steps:
(1) the first refrigerant gas of low-temp low-pressure is sequentially sent to a first compressor and a second compressor, obtains high temperature and pressure
The first refrigerant gas, the first refrigerant gas of the high temperature and pressure is then sent into the first heat exchanger channels I, and with first
The first refrigerant liquid is obtained after cooling water heat exchange in heat exchanger channels II；
(2) first refrigerant liquid is divided into liquid a, liquid b and liquid c, is obtained after liquid a is sent into first throttle valve
The gas-liquid mixture a of medium temperature and medium pressure is simultaneously sent into the second heat exchanger channels I, and oil gas is sent into the second heat exchanger channels II at this time, and with institute
Gas-liquid mixture a heat exchange is stated, the level-one condensation of oil gas is realized, then collects the condensed oil liquid of level-one, wherein gas-liquid
Mixture a, which absorbs heat, becomes the gas a of medium temperature and medium pressure；
(3) liquid b is sent into third heat exchanger channels II, obtains the gas-liquid of medium temperature and medium pressure after liquid c is sent into the 5th throttle valve
Mixture c is simultaneously sent into third heat exchanger channels I, then exchanges heat with the liquid b in third heat exchanger channels II, gas-liquid mixture c heat absorption
Become the gas c of medium temperature and medium pressure；
(4) gas c obtained in gas a obtained in step (2) and step (3) is compressed with step (1) through described first
It is fed again into the second compressor after the first refrigerant gas mixing of machine compression；
(5) the liquid b after heat exchange in step (3) is divided for liquid b1 and liquid b2, the liquid b1 is sequentially sent to the second section
Valve and the first gas-liquid separator are flowed, neat liquid b1 and pure gas b1 are obtained, the neat liquid b1 is sent into the 4th heat exchanger channels I
In, the condensed oil gas of level-one in step (2) is sent into the 4th heat exchanger channels II at this time, and exchanges heat with neat liquid b1,
Realize the B-grade condensation of oil gas, the oil liquid after B-grade condensation, which is then collected neat liquid b1 heat absorption, becomes the gas of low-temp low-pressure
It is fed again into after liquid mixture b1 in the first gas-liquid separator；
(6) liquid b2 is sent into the 7th heat exchanger channels II, the second refrigerant gas of low-temp low-pressure is sent into third compressor
In, the second refrigerant gas of high temperature and pressure is obtained, the second refrigerant gas of the high temperature and pressure is then sent into the 7th
It in heat exchanger channels I, and exchanges heat with liquid b2, the second refrigerant gas of the high temperature and pressure is condensed into the second refrigeration of high pressure
Agent liquid, the liquid b2 heat absorption become the gas b2 of low-temp low-pressure；
(7) the gas b2 in the pure gas b1 and step (6) in step (5) is mixed with the first refrigerant gas of low-temp low-pressure
After be fed again into the first compressor；
(8) the second refrigerant liquid of the high pressure in step (6) is sequentially sent to the 5th heat exchanger channels I, third throttle valve and
In two gas-liquid separators, pure second refrigerant liquid and pure second refrigerant gas are obtained, by the pure second refrigerant liquid
It is sent into the 6th heat exchanger channels I, the oil gas after B-grade condensation in step (5) is sent into the 6th heat exchanger channels II at this time,
And with the pure second refrigerant liquid heat exchange, realize oil gas three-level condensation, then the condensed oil liquid of three-level is gathered up
Come, the pure second refrigerant liquid after heat exchange becomes the second refrigerant gas-liquid mixture of low-temp low-pressure and is fed again into the second gas
In liquid/gas separator；
(9) by pure second refrigerant gas obtained in step (8) be sent into the 5th heat exchanger channels II in, and with the 5th heat exchanger channels
The second refrigerant liquid heat exchange of high pressure in I, the second refrigerant gas after heat exchange enter third compressor, and the second of high pressure
It is again introduced into third throttle valve after refrigerant liquid cooling.
Preferably, first refrigerant is propane, and the second refrigerant is ethane.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages: one kind of the invention
For the multi-stage condensing system of petroleum vapor recovery, pass through the mutual of level-one condensing unit, B-grade condensation unit and three-level condensing unit
Cooperation can guarantee refrigerating efficiency, and the system structure under the premise of reducing system complexity and compressor usage quantity
Simply, easy to operate；Multi-stage condensing method based on the multi-stage condensing system, step is simple, easy to operate, can be efficient right
Oil gas carries out condensing recovery.
Detailed description of the invention
Attached drawing 1 is the structural schematic diagram of the multi-stage condensing system in specific embodiments of the present invention.
Wherein: 1, the first compressor；2, the second compressor；3, First Heat Exchanger；3a, the first heat exchanger channels I；3b, first
Heat exchanger channels II；4, first throttle valve；5, the second heat exchanger；5a, the second heat exchanger channels I；5b, the second heat exchanger channels II；6,
Three heat exchangers；6a, third heat exchanger channels I；6b, third heat exchanger channels II；7, second throttle；8, the first gas-liquid separator；9,
4th heat exchanger；9a, the 4th heat exchanger channels I；9b, the 4th heat exchanger channels II；10, the 5th heat exchanger；10a, the 5th heat exchanger channels
I；10b, the 5th heat exchanger channels II；11, third throttle valve；12, the second gas-liquid separator；13, the 6th heat exchanger；13a, the 6th change
Passage of heat I；13b, the 6th heat exchanger channels II；14, third compressor；15, the 7th heat exchanger；15a, the 7th heat exchanger channels I；15b,
7th heat exchanger channels II；16, the 4th throttle valve；17, the 5th throttle valve.
Specific embodiment
The technical solution of the present invention will be further described below with reference to the accompanying drawings.
Shown in Figure 1, a kind of multi-stage condensing system for petroleum vapor recovery, which includes circulation
There are the level-one condensing unit of the first refrigerant and B-grade condensation unit, recycle stream to be connected with the three-level condensing unit of second refrigerant.
It herein, can be multiple in the system of reduction by the mutual cooperation of level-one condensing unit, B-grade condensation unit and three-level condensing unit
Guarantee refrigerating efficiency under the premise of miscellaneous degree and compressor usage quantity, and the system structure is simple, it is easy to operate.Here
One refrigerant is propane, and second refrigerant is that ethane, propane and ethane are selected according to respective physical property, is more suitable for multistage cold
It coagulates, and freon compared to the prior art, the propane and ethane in the present embodiment are all the originals in chemical plant in production process
Material, it is easier to obtain, not need additionally to be purchased.
Level-one condensing unit includes the first compressor 1 being sequentially communicated, the second compressor 2, First Heat Exchanger 3, first segment
Valve 4 and the second heat exchanger 5 are flowed, First Heat Exchanger 3 has the first heat exchanger channels I3a and the first heat exchanger channels II3b, and second changes
Hot device 5 has the second heat exchanger channels I5a and the second heat exchanger channels II5b, and the first both ends heat exchanger channels I3a are compressed with second respectively
The gas outlet of machine 2 is connected with first throttle valve 4, and the second both ends heat exchanger channels I5a are compressed with first throttle valve 4 and second respectively
The air inlet of machine 2 is connected.Here, in the first heat exchanger channels II3b be equipped with cooling water, for in the first heat exchanger channels I3a
First refrigerant heat exchanger, oil gas in the second heat exchanger channels II5b with the first refrigerant after cooling in the second heat exchanger channels I5a
Level-one condensation is realized in heat exchange, and condensation temperature is 2 DEG C.Here the first heat exchanger channels I3a and the first heat exchanger channels II3b be respectively
The tube side and shell side of First Heat Exchanger 3, the second heat exchanger channels I5a and the second heat exchanger channels II5b are respectively the second heat exchanger 5
Tube side and shell side.
In the present embodiment, the first compressor 1 and the second compressor 2 are fuel injection helical lobe compressor, and the first compressor 1
Compression ratio less than the second compressor 2, First Heat Exchanger 3 is water-cooled condenser, and the second heat exchanger 5 is thermal siphon heat exchanger, heat
Siphon heat exchanger is dramatically increased compared to existing dry type and full-liquid type heat exchanger, heat transfer effect, and reduces heat exchange area.
B-grade condensation unit include the third heat exchanger 6 being sequentially communicated, second throttle 7, the first gas-liquid separator 8 and
There is third heat exchanger channels I6a and third heat exchanger channels II6b, the 4th heat exchanger 9 to have for 4th heat exchanger 9, third heat exchanger 6
The both ends 4th heat exchanger channels I9a and the 4th heat exchanger channels II9b, third heat exchanger channels I6a are remote with the first heat exchanger channels I3a respectively
One end from the second compressor 2 is connected with second throttle 7, the 4th both ends heat exchanger channels I9a respectively with the first gas-liquid separation
The import of device 8 is connected with liquid outlet, and the gas vent of the first gas-liquid separator 8 is connected with the air inlet of the first compressor 1
It is logical.Here, freeze in the 4th heat exchanger channels II9b with first in the 4th heat exchanger channels I9a by the condensed oil gas of level-one
B-grade condensation is realized in agent heat exchange, and condensation temperature is -30 DEG C.Here third heat exchanger channels I6a and third heat exchanger channels II6b points
Not Wei third heat exchanger 6 shell side and tube side, the 4th heat exchanger channels I9a and the 4th heat exchanger channels II9b are respectively the 4th heat exchanger
9 tube side and shell side.
The multi-stage condensing system further includes Section five for being connected to the first heat exchanger channels I3a far from 2 one end of the second compressor
Valve 17 is flowed, the both ends third heat exchanger channels II6b are connected with the air inlet of the 5th throttle valve 17 and the second compressor 2 respectively.
In the present embodiment, third heat exchanger 6 is cooler, and the 4th heat exchanger 9 is thermal siphon heat exchanger.
In the present embodiment, there are two the 4th heat exchangers 9, and two the 4th heat exchangers 9 are in parallel setting.It is arranged in parallel
One of them is system normal use for two the 4th heat exchangers 9, the other is it is spare, so that the next heat exchange of low temperature environment
Spare heat exchanger can be changed immediately after device failure, do not influence the operation of system.
Three-level condensing unit includes the 5th heat exchanger 10, third throttle valve 11, the second gas-liquid separator 12 being sequentially communicated
And the 6th heat exchanger 13, the 5th heat exchanger 10 have the 5th heat exchanger channels I10a and the 5th heat exchanger channels II10b, the 6th heat exchange
Device 13 have the 6th heat exchanger channels I13a and the 6th heat exchanger channels II13b, the 6th both ends heat exchanger channels I13a respectively with the second gas
The import of liquid/gas separator 12 is connected with liquid outlet.Here, oil gas in the 6th heat exchanger channels II13b with the 6th heat exchanger channels
Three-level condensation is realized in second refrigerant heat exchange in I13a, and condensation temperature is -75 DEG C.Here the 5th heat exchanger channels I10a and
Five heat exchanger channels II10b are the shell side and tube side of the 5th heat exchanger 10, the 6th heat exchanger channels I13a and the 6th heat exchanger channels II13b
The respectively tube side and shell side of the 6th heat exchanger 13.
In the present embodiment, the 5th heat exchanger 10 is regenerator, and the 6th heat exchanger 13 is thermal siphon heat exchanger.
In the present embodiment, there are two the 6th heat exchangers 13, and two the 6th heat exchangers 13 are in parallel setting.It is arranged in parallel
Two the 6th heat exchangers 13 one of them be system normal use, the other is spare, so that low temperature environment is next
Spare heat exchanger can be changed after heat exchanger failure immediately, does not influence the operation of system.
The multi-stage condensing system further includes the third compressor 14 and the 7th heat exchanger 15 being sequentially communicated, and is connected to
Fourth throttle valve 16 of the three heat exchanger channels I6a far from first one end heat exchanger channels I3a, the 7th heat exchanger 15 have the 7th heat exchange logical
Road I15a and the 7th heat exchanger channels II15b, gas of the 5th both ends heat exchanger channels I10a respectively with the second gas-liquid separator 12 go out
Mouth is connected with the air inlet of third compressor 14, and the 5th both ends heat exchanger channels II10b are remote with the 7th heat exchanger channels I15a respectively
One end from third compressor 14 is connected with third throttle valve 11, the other end and third compressor of the 7th heat exchanger channels I15a
14 gas outlet is connected, the 7th both ends the heat exchanger channels II15b air inlet with the 4th throttle valve 16 and the first compressor 1 respectively
It is connected.Here the 7th heat exchanger channels I15a and the 7th heat exchanger channels II15b is respectively the tube side and shell of the 7th heat exchanger 15
Journey.By the setting of the 7th heat exchanger 15, the heat exchange of the first refrigerant and second refrigerant is realized, so that level-one condenses
Unit and B-grade condensation unit can reduce the use of compressor, reduce the complexity of system with three-level condensing unit.
In the present embodiment, the 7th heat exchanger 15 is evaporative condenser.
Herein, oil gas passes sequentially through the second heat exchanger channels II5b, the 4th heat exchanger channels II9b and the 6th heat exchanger channels
II13b completes the heat exchange with the first refrigerant and second refrigerant, and is condensed into oil liquid and successively collects.
In the present embodiment, all parts of the multi-stage condensing system are interconnected by pipeline, and the same part connects simultaneously
Branched pipe is used when leading to two remaining parts, is connected between a plurality of pipeline using threeway.Three compressions are only used only in whole system
Machine is driven, and is greatly reduced the complexity of system, has been saved cost.
A kind of multi-stage condensing method for petroleum vapor recovery based on above-mentioned multi-stage condensing system, includes the following steps:
1) the first refrigerant gas of low-temp low-pressure is sequentially sent to the first compressor 1 and the second compressor 2, obtains high temperature and pressure
The first refrigerant gas, the first refrigerant gas of high temperature and pressure is then sent into the first heat exchanger channels I3a, and change with first
The first refrigerant liquid is obtained after cooling water heat exchange in passage of heat II3b；
2) the first refrigerant liquid is divided into liquid a, liquid b and liquid c, obtains medium temperature after liquid a is sent into first throttle valve 4
The gas-liquid mixture a of middle pressure is simultaneously sent into the second heat exchanger channels I5a, and oil gas is sent into the second heat exchanger channels II5b at this time, and with gas
The level-one condensation of oil gas is realized in liquid mixture a heat exchange, and wherein gas-liquid mixture a heat absorption becomes the gas a of medium temperature and medium pressure；
3) liquid b is sent into third heat exchanger channels II6b, obtains the gas of medium temperature and medium pressure after liquid c is sent into the 5th throttle valve 17
Liquid mixture c is simultaneously sent into third heat exchanger channels I6a, then exchanges heat with the liquid b in third heat exchanger channels II6b, gas-liquid mixture
C, which absorbs heat, becomes the gas c of medium temperature and medium pressure；
4) it will be compressed through the first compressor 1 in gas c obtained in gas a obtained in step 2 and step 3) and step 1)
It is fed again into the second compressor 2 after the mixing of first refrigerant gas；
5) the liquid b after exchanging heat in step 3) is divided for liquid b1 and liquid b2, liquid b1 is sequentially sent to 7 He of second throttle
First gas-liquid separator 8, obtains neat liquid b1 and pure gas b1, and neat liquid b1 is sent into the 4th heat exchanger channels I9a, at this time will
The condensed oil gas of level-one is sent into the 4th heat exchanger channels II9b in step 2, and is exchanged heat with neat liquid b1, realizes the two of oil gas
Grade condensation, neat liquid b1, which absorbs heat after becoming the gas-liquid mixture b1 of low-temp low-pressure, to be fed again into the first gas-liquid separator 8；
6) liquid b2 is sent into the 7th heat exchanger channels II15b, the second refrigerant gas of low-temp low-pressure is sent into third compression
In machine 14, the second refrigerant gas of high temperature and pressure is obtained, the second refrigerant gas of high temperature and pressure is then sent into the 7th and is changed
It in passage of heat I15a, and exchanges heat with liquid b2, the second refrigerant gas of high temperature and pressure is condensed into the second refrigerant liquid of high pressure
Body, liquid b2, which absorbs heat, becomes the gas b2 of low-temp low-pressure；
7) after the pure gas b1 in step 5) and the gas b2 in step 6) being mixed with the first refrigerant gas of low-temp low-pressure
It is fed again into the first compressor 1；
8) the second refrigerant liquid of the high pressure in step 6) is sequentially sent to the 5th heat exchanger channels I10a, 11 and of third throttle valve
In second gas-liquid separator 12, pure second refrigerant liquid and pure second refrigerant gas are obtained, by pure second refrigerant liquid
It is sent into the 6th heat exchanger channels I13a, the oil gas after B-grade condensation in step 5) is sent into the 6th heat exchanger channels II13b at this time,
And with pure second refrigerant liquid heat exchange, realize the three-level condensation of oil gas, the pure second refrigerant liquid after heat exchange becomes low temperature
The second refrigerant gas-liquid mixture of low pressure is simultaneously fed again into the second gas-liquid separator 12；
9) pure second refrigerant gas obtained in step 8) is sent into the 5th heat exchanger channels II10b, and logical with the 5th heat exchange
The second refrigerant liquid heat exchange of high pressure in road I10a, the second refrigerant gas after heat exchange enter third compressor 14, high
It is again introduced into third throttle valve 11 after the second refrigerant liquid cooling of pressure.
Wherein, the first refrigerant is propane, and second refrigerant is ethane.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of multi-stage condensing system for petroleum vapor recovery, it is characterised in that: the multi-stage condensing system includes circulation
There are the level-one condensing unit of the first refrigerant and B-grade condensation unit, recycle stream to be connected with the three-level condensing unit of second refrigerant,
The level-one condensing unit include the first compressor (1) being sequentially communicated, the second compressor (2), First Heat Exchanger (3),
First throttle valve (4) and the second heat exchanger (5), the First Heat Exchanger (3) are changed with the first heat exchanger channels I(3a) and first
Passage of heat II(3b), second heat exchanger (5) has the second heat exchanger channels I(5a) and the second heat exchanger channels II(5b), it is described
First heat exchanger channels I(3a) both ends are connected with the gas outlet of second compressor (2) and the first throttle valve (4) respectively
It is logical, the second heat exchanger channels I(5a) the both ends air inlet with the first throttle valve (4) and second compressor (2) respectively
Mouth is connected；
The B-grade condensation unit includes the third heat exchanger (6) being sequentially communicated, second throttle (7), the first gas-liquid separator
(8) and the 4th heat exchanger (9), the third heat exchanger (6) have third heat exchanger channels I(6a) and third heat exchanger channels II
(6b), the 4th heat exchanger (9) have the 4th heat exchanger channels I(9a) and the 4th heat exchanger channels II(9b), the third heat exchange
Channel I(6a) both ends respectively with the first heat exchanger channels I(3a) far from second compressor (2) one end and described second
Throttle valve (7) is connected, the 4th heat exchanger channels I(9a) both ends respectively with the import of first gas-liquid separator (8) and
Liquid outlet is connected, and the gas vent of first gas-liquid separator (8) is connected with the air inlet of first compressor (1)
It is logical；
The three-level condensing unit includes the 5th heat exchanger (10), the third throttle valve (11), the second gas-liquid separation being sequentially communicated
Device (12) and the 6th heat exchanger (13), the 5th heat exchanger (10) are logical with the heat exchange of the 5th heat exchanger channels I(10a) and the 5th
Road II(10b), the 6th heat exchanger (13) has the 6th heat exchanger channels I(13a) and the 6th heat exchanger channels II(13b), it is described
6th heat exchanger channels I(13a) both ends are connected with the import of second gas-liquid separator (12) and liquid outlet respectively；
The multi-stage condensing system further includes the third compressor (14) and the 7th heat exchanger (15) being sequentially communicated, and is connected to
The third heat exchanger channels I(6a) the 4th throttle valve (16) far from the one end the first heat exchanger channels I(3a), the described 7th changes
Hot device (15) has the 7th heat exchanger channels I(15a) and the 7th heat exchanger channels II(15b), the 5th heat exchanger channels I(10a) two
End is connected with the air inlet of the gas vent of second gas-liquid separator (12) and the third compressor (14) respectively, institute
State the 5th heat exchanger channels II(10b) both ends are respectively with the 7th heat exchanger channels I(15a) far from the third compressor (14)
One end is connected with the third throttle valve (11), the 7th heat exchanger channels I(15a) the other end and the third compressor
(14) gas outlet is connected, the 7th heat exchanger channels II(15b) both ends respectively with the 4th throttle valve (16) and described
The air inlet of first compressor (1) is connected；
Wherein, oil gas passes sequentially through the second heat exchanger channels II(5b), the 4th heat exchanger channels II(9b) and described
Six heat exchanger channels II(13b), complete the heat exchange with first refrigerant and the second refrigerant.
2. a kind of multi-stage condensing system for petroleum vapor recovery according to claim 1, it is characterised in that: the multistage is cold
Solidifying system further includes being connected to the first heat exchanger channels I(3a) the 5th throttle valve far from described second compressor (2) one end
(17), the third heat exchanger channels II(6b) both ends respectively with the 5th throttle valve (17) and second compressor (2)
Air inlet is connected.
3. a kind of multi-stage condensing system for petroleum vapor recovery according to claim 1, it is characterised in that: described first changes
Passage of heat II(3b) in be equipped with cooling water, be used for and first refrigerant heat exchanger in the first heat exchanger channels I(3a).
4. a kind of multi-stage condensing system for petroleum vapor recovery according to claim 1, it is characterised in that: the described 4th changes
There are two hot devices (9), and the 4th heat exchanger (9) described in two is in parallel setting.
5. a kind of multi-stage condensing system for petroleum vapor recovery according to claim 1, it is characterised in that: the described 6th changes
There are two hot devices (13), and the 6th heat exchanger (13) described in two is in parallel setting.
6. a kind of multi-stage condensing method for petroleum vapor recovery, the multi-stage condensing method is based on any in claim 1 to 5
Multi-stage condensing system described in item claim, it is characterised in that: the multi-stage condensing method includes the following steps:
1) the first refrigerant gas of low-temp low-pressure is sequentially sent to the first compressor (1) and the second compressor (2), obtains high temperature
First refrigerant gas of the high temperature and pressure is then sent into the first heat exchanger channels I(3a by the first refrigerant gas of high pressure),
And the first refrigerant liquid is obtained after exchanging heat with the cooling water in the first heat exchanger channels II(3b)；
2) first refrigerant liquid is divided into liquid a, liquid b and liquid c, is obtained after liquid a is sent into first throttle valve (4)
To the gas-liquid mixture a and the second heat exchanger channels I(5a of feeding of medium temperature and medium pressure), oil gas is sent into the second heat exchanger channels II at this time
(5b), and exchange heat with the gas-liquid mixture a, it realizes the level-one condensation of oil gas, then collects the oil liquid that level-one condenses,
Wherein gas-liquid mixture a heat absorption becomes the gas a of medium temperature and medium pressure；
3) liquid b is sent into third heat exchanger channels II(6b) in, medium temperature and medium pressure is obtained after liquid c is sent into the 5th throttle valve (17)
Gas-liquid mixture c and be sent into third heat exchanger channels I(6a), then in third heat exchanger channels II(6b) liquid b exchange heat, gas
Liquid mixture c, which absorbs heat, becomes the gas c of medium temperature and medium pressure；
4) by gas c obtained in gas a obtained in step 2 and step 3) and step 1) through first compressor (1)
It is fed again into the second compressor (2) after the first refrigerant gas mixing of compression；
5) the liquid b after exchanging heat in step 3) is divided for liquid b1 and liquid b2, the liquid b1 is sequentially sent to the second throttling
Valve (7) and the first gas-liquid separator (8), obtain neat liquid b1 and pure gas b1, and it is logical that the neat liquid b1 is sent into the 4th heat exchange
Road I(9a) in, the condensed oil gas of level-one in step 2 is sent into the 4th heat exchanger channels II(9b at this time) in, and with pure liquid
Body b1 heat exchange, realizes the B-grade condensation of oil gas, then collects the oil liquid of B-grade condensation, and neat liquid b1 heat absorption becomes low temperature
It is fed again into after the gas-liquid mixture b1 of low pressure in the first gas-liquid separator (8)；
6) liquid b2 is sent into the 7th heat exchanger channels II(15b) in, the second refrigerant gas of low-temp low-pressure is sent into third pressure
In contracting machine (14), the second refrigerant gas of high temperature and pressure is obtained, then by the second refrigerant gas of the high temperature and pressure
It is sent into the 7th heat exchanger channels I(15a) in, and exchange heat with liquid b2, the second refrigerant gas of the high temperature and pressure is condensed into
The second refrigerant liquid of high pressure, the liquid b2 heat absorption become the gas b2 of low-temp low-pressure；
7) after the pure gas b1 in step 5) and the gas b2 in step 6) being mixed with the first refrigerant gas of low-temp low-pressure
It is fed again into the first compressor (1)；
8) the second refrigerant liquid of the high pressure in step 6) is sequentially sent to the 5th heat exchanger channels I(10a), third throttle valve
(11) and in the second gas-liquid separator (12), pure second refrigerant liquid and pure second refrigerant gas are obtained, by described pure
Two refrigerant liquids are sent into the 6th heat exchanger channels I(13a) in, the oil gas after B-grade condensation in step 5) is sent into the at this time
Six heat exchanger channels II(13b) in, and with the pure second refrigerant liquid heat exchange, realize oil gas three-level condensation, then by three
The condensed oil liquid of grade collects, and the second refrigerant gas-liquid that the pure second refrigerant liquid after heat exchange becomes low-temp low-pressure is mixed
It closes object and is fed again into the second gas-liquid separator (12)；
9) pure second refrigerant gas obtained in step 8) is sent into the 5th heat exchanger channels II(10b) in, and exchange heat with the 5th
Channel I(10a) in high pressure second refrigerant liquid heat exchange, the second refrigerant gas after heat exchange enters third compressor
(14), it is again introduced into third throttle valve (11) after the second refrigerant liquid cooling of high pressure.
7. a kind of multi-stage condensing method for petroleum vapor recovery according to claim 6, it is characterised in that: first system
Cryogen is propane, and the second refrigerant is ethane.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113350959A (en) * | 2021-07-07 | 2021-09-07 | 陕西凯尔利尼冷冻空调有限公司 | Waste gas condensation recovery system using condensing unit and environment-friendly treatment method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007130108A1 (en) * | 2006-05-05 | 2007-11-15 | Battelle Energy Alliance, Llc | Apparatus for the liquefaction of natural gas and methods relating to same |
| CN101184964A (en) * | 2005-06-13 | 2008-05-21 | 斯文宁·埃里克森 | Device and method for controlling cooling systems |
| CN107024045A (en) * | 2011-06-13 | 2017-08-08 | 阿雷斯科技术有限公司 | Condenser-reboiler system and its operating method |
| EP3225940A1 (en) * | 2014-12-26 | 2017-10-04 | Mitsubishi Heavy Industries Compressor Corporation | Gas recovery system for compressor, compressor system, and refrigeration cycle system |
| WO2017222138A1 (en) * | 2016-06-22 | 2017-12-28 | 삼성중공업 주식회사 | Fluid cooling apparatus |
| CN107803099A (en) * | 2017-10-10 | 2018-03-16 | 重庆兴发金冠化工有限公司 | A kind of vapour-recovery unit and technique |
| CN210165624U (en) * | 2019-06-28 | 2020-03-20 | 张家港市江南利玛特设备制造有限公司 | A multistage condensing system for vapor recovery system |
-
2019
- 2019-06-28 CN CN201910574443.4A patent/CN110345707B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101184964A (en) * | 2005-06-13 | 2008-05-21 | 斯文宁·埃里克森 | Device and method for controlling cooling systems |
| WO2007130108A1 (en) * | 2006-05-05 | 2007-11-15 | Battelle Energy Alliance, Llc | Apparatus for the liquefaction of natural gas and methods relating to same |
| CN107024045A (en) * | 2011-06-13 | 2017-08-08 | 阿雷斯科技术有限公司 | Condenser-reboiler system and its operating method |
| EP3225940A1 (en) * | 2014-12-26 | 2017-10-04 | Mitsubishi Heavy Industries Compressor Corporation | Gas recovery system for compressor, compressor system, and refrigeration cycle system |
| WO2017222138A1 (en) * | 2016-06-22 | 2017-12-28 | 삼성중공업 주식회사 | Fluid cooling apparatus |
| CN107803099A (en) * | 2017-10-10 | 2018-03-16 | 重庆兴发金冠化工有限公司 | A kind of vapour-recovery unit and technique |
| CN210165624U (en) * | 2019-06-28 | 2020-03-20 | 张家港市江南利玛特设备制造有限公司 | A multistage condensing system for vapor recovery system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113350959A (en) * | 2021-07-07 | 2021-09-07 | 陕西凯尔利尼冷冻空调有限公司 | Waste gas condensation recovery system using condensing unit and environment-friendly treatment method |
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Address after: 215634 east side of Huachang Road, Yangtze River Chemical Industrial Park, Zhangjiagang City, Suzhou City, Jiangsu Province (LIMAT) Patentee after: Suzhou Limat Energy Equipment Co.,Ltd. Address before: 215634 east side of Huachang Road, Yangtze River Chemical Industrial Park, Zhangjiagang City, Suzhou City, Jiangsu Province (LIMAT) Patentee before: JIANGNAN LMART EQUIPMENT MANUFACTURING (ZHANGJIAGANG) Co.,Ltd. |