CN209392767U - With the indirect condensing formula petroleum vapor recovery unit from the function that defrosts - Google Patents
With the indirect condensing formula petroleum vapor recovery unit from the function that defrosts Download PDFInfo
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- CN209392767U CN209392767U CN201821607189.0U CN201821607189U CN209392767U CN 209392767 U CN209392767 U CN 209392767U CN 201821607189 U CN201821607189 U CN 201821607189U CN 209392767 U CN209392767 U CN 209392767U
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- 238000011084 recovery Methods 0.000 title claims abstract description 31
- 239000003208 petroleum Substances 0.000 title claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims abstract description 101
- 239000003921 oil Substances 0.000 claims abstract description 90
- 238000010257 thawing Methods 0.000 claims abstract description 74
- 238000005057 refrigeration Methods 0.000 claims abstract description 50
- 239000002699 waste material Substances 0.000 claims abstract description 39
- 238000009833 condensation Methods 0.000 claims abstract description 31
- 230000005494 condensation Effects 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 195
- 239000007788 liquid Substances 0.000 claims description 61
- 238000004064 recycling Methods 0.000 claims description 26
- 238000001704 evaporation Methods 0.000 claims description 25
- 230000008020 evaporation Effects 0.000 claims description 25
- 238000001816 cooling Methods 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 12
- 238000007906 compression Methods 0.000 claims description 12
- 125000004122 cyclic group Chemical group 0.000 claims description 12
- 238000001035 drying Methods 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 9
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 9
- 238000003303 reheating Methods 0.000 claims description 9
- 238000010792 warming Methods 0.000 claims description 6
- 238000004781 supercooling Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims 2
- 239000010726 refrigerant oil Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 11
- 235000003642 hunger Nutrition 0.000 abstract description 6
- 230000037351 starvation Effects 0.000 abstract description 6
- 230000005012 migration Effects 0.000 abstract description 5
- 238000013508 migration Methods 0.000 abstract description 5
- 239000010725 compressor oil Substances 0.000 abstract description 4
- 230000008014 freezing Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 4
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a kind of indirect condensing formula petroleum vapor recovery units with from the function that defrosts, including level-one direct-expansion type condenser system, second level indirect condensing system, three-level indirect condensing system and the waste cold recovery system connected by oil-gas pipeline.The utility model organically combines direct-expansion type Refrigeration Technique and indirect condensing technology, the second level and the third level are easy the system for freezing and solidifying, because there is the switching of refrigeration and defrosting mode, easily occur leading to low pressure and oil starvation problem because of the migration of refrigerant, and use indirect condensing formula technology, so that compressor refrigerant system is in single refrigeration cycle always, thoroughly avoid refrigeration migration problem, and then solve the problems, such as system low-voltage and compressor oil starvation, substantially increase condensation unit reliability of operation.
Description
Technical field
The utility model relates to industrial organic compound recovery gear technical fields, have more particularly to one kind from defrosting
The indirect condensing formula petroleum vapor recovery unit of function.
Background technique
Fluid oil can generate a large amount of harmful oil gas in the occasions such as tank field storage, hair oil operation, oil plant processing, not reach
Target oil gas is discharged into atmospheric environment, not only causes energy waste, but also is polluted environment, damage human health and can be led
Cause fire hazard.In the case where national environmental protection suppresses policy, country, place, which have all been formulated, forces standard requirements to have exhaust of oil
Occasion, it is necessary to oil gas be recycled, guarantee that the tail gas of discharge is up to standard.
Currently, oil-gas recovery method is mainly absorption process, absorption method, membrane separation process and condensation method, but any single treatment
Method all cannot achieve the disposable emission compliance of oil gas, usually all be that being applied in combination for various methods is just able to achieve emissions object.
Wherein, condensation method is as the processing of front end high concentration, with its unique comprehensive performance, it has also become the prime of various group technology indispensabilities
Processing method.
Condensing type oil gas recovery system used at present, use is mostly direct-expansion-type three-level refrigeration modes, directly
Expansion type refrigeration advantage is that refrigerant directly exchanges heat with processed oil gas, and heat exchange efficiency is high.But due to condensing type oil gas
The temperature of processing is very low, causes unit operation a period of time finisher channel that can be blocked by ice and the oil-gas component of solidification, makes
Olefiant gas channel blockage, it is necessary to carry out defrosting processing, otherwise unit can not continuous reliability service.Meanwhile evaporator defrosting is adopted
It is refrigerant hot gas defrosting, that is to say, that condensing type oil gas recycling unit is frequently necessary in two boiler channel lubrication grooves
Refrigeration and defrosting are changed, so that refrigerant is not parked in the evaporator chamber vivo migration of different temperatures, leads to the refrigeration in two channels
Dosage is uneven and causes when some channel is run compressor low pressure relatively low and shuts down.Simultaneously as refrigerant ceaselessly migrates,
Also be easy to cause compressor lubricant oil by exhaust enter evaporator it is cold it is intracavitary can not cause, and then occur compressor oil starvation burning
Ruin problem.Furthermore condensation method is usually processed oil gas Temperature Treatment to -70 DEG C or so, and such low temperature is for fastener
Sealing be test, often there is third level condenser system and refrigerant leakage occurs in practical application.
Above-mentioned existing reality technology problem greatly reduces condensing type oil gas recycling unit reliability of operation.For
This, the utility model is just directed to solve integrity problem existing for current condensing type oil gas recovery technology, pushes away extensively for it
Wide use lays the foundation.
Utility model content
Purpose of utility model: in order to overcome integrity problem present in existing direct-expansion type condensation technology, the utility model
Provide a kind of indirect condensing formula petroleum vapor recovery unit with from defrosting function.
Technical solution: to reach this purpose, the utility model uses following technical scheme:
The indirect condensing formula petroleum vapor recovery unit described in the utility model having from the function that defrosts, including by oil-gas pipeline
Level-one direct-expansion type condenser system, second level indirect condensing system, three-level indirect condensing system and the waste cold recovery system of connection,
In:
Level-one direct-expansion type condenser system: the most of moisture and high boiling in removal oil gas is directly condensed by refrigerant
Oil-gas component；
Second level indirect condensing system: including two-stage compression machine cooling system and ethylene glycol solution secondary refrigerant system, pass through second
Two-stage compression machine cooling system is connected by glycol refrigerating medium plate heat exchanger with ethylene glycol solution secondary refrigerant system, using cooled
The further condensed oil-gas of ethylene glycol solution secondary refrigerant system；
Three-level indirect condensing system: it including three-level cascade refrigeration agent system and glacial epoch secondary refrigerant system, is carried by glacial epoch
Three-level cascade refrigeration agent system is connected by cryogen plate heat exchanger with glacial epoch secondary refrigerant system, utilizes cooled glacial epoch refrigerating
Agent system is by oil gas condensation to final process temperature；
Waste cold recovery system: the low temperature cold oil gas that heat exchanger discharges three-level indirect condensing system is recycled by a waste cold
Tail gas and ethylene glycol solution secondary refrigerant system carry out heat exchange recycling, then recycling heat exchanger by secondary waste cold will be from ethylene glycol solution
Tail gas and initial import high-temperature oil gas after secondary refrigerant system heat exchange carry out secondary waste cold recycling.
Further, the level-one direct-expansion type condenser system includes stage compressor, and refrigerant is compressed by stage compressor
After form high temperature and high pressure gas, cooled down by first-stage condenser, formed high pressure refrigerant liquid, high pressure refrigerant liquid by storage
Liquid device flows into device for drying and filtering dry filter, carries out reducing pressure by regulating flow subsequently into one-stage expansion valve, enters back into evaporator for oil gas
Condensation returns to stage compressor after being then passed through the first gas-liquid separator reheating to 5 DEG C.
Further, the second level indirect condensing system has refrigeration cycle operating condition and defrosting state of cyclic operation, in which:
Refrigeration cycle operating condition: refrigerant forms high temperature and high pressure gas after split-compressor compresses, by second level oil
It after carrying out Oil-gas Separation from device, is cooled down into secondary condenser, forms high pressure refrigerant liquid, while in high pressure refrigerant liquid
Oil return to split-compressor, high pressure refrigerant liquid is after second level liquid storage device and secondary drying filter, by the second gas-liquid
Separator carries out supercooling cooling, carries out reducing pressure by regulating flow subsequently into compound expansion valve, then flows into ethylene glycol solution refrigerating medium plate
Low-temperature evaporation is carried out in formula heat exchanger, and ethylene glycol solution refrigerating medium is cooled to -25 DEG C, the gaseous state low pressure cold after low-temperature evaporation
Matchmaker returns to split-compressor after entering the second gas-liquid separator reheating, completes secondary refrigerant circulation；Ethylene glycol solution refrigerating medium
After eg pump pressurizes, into being cooled to -25 DEG C in ethylene glycol solution refrigerating medium plate heat exchanger, using a waste cold
Recycling heat exchanger is further cooled to -30 DEG C, enters the first secondary evaporimeter by solenoid valve, by oil gas condensation to -25 DEG C, then
By triple valve, eg pump is returned to by ethylene glycol Constant pressure tank, completes the first secondary evaporimeter channel ethylene glycol solution refrigerating
Agent refrigeration cycle；Ethylene glycol solution refrigerating medium is after eg pump pressurizes, into ethylene glycol solution refrigerating medium plate heat exchanger
In be cooled to -25 DEG C, be further cooled to -30 DEG C using waste cold recycling heat exchanger, enter the two or two by solenoid valve
Grade evaporator, using triple valve, returns to eg pump by ethylene glycol Constant pressure tank, completes second by oil gas condensation to -25 DEG C
Secondary evaporimeter channel ethylene glycol solution refrigerating medium refrigeration cycle；
Defrosting state of cyclic operation: the ethylene glycol solution refrigerating medium after the evaporation of the first secondary evaporimeter is carried out by triple valve
Flow is adjusted, and a part of flow is returned directly to eg pump, after another part flow enters the heating of second level defrosting plate heat exchanger,
By triple valve enter the second secondary evaporimeter carry out defrosting, after defrosting, cooled eth.glycol by solenoid valve with
Front portion flow converges to eg pump together, completes the second secondary evaporimeter channel defrosting circulation；It is steamed by the second second level
Ethylene glycol solution refrigerating medium after sending out device evaporation carries out flow adjusting by triple valve, and a part of flow is returned directly to ethylene glycol
Pump after another part flow enters the heating of second level defrosting plate heat exchanger, is carried out by triple valve into the first secondary evaporimeter
Defrosting, after defrosting, cooled eth.glycol converges to eg pump by solenoid valve together with front portion flow, complete
It is recycled at the first secondary evaporimeter channel defrosting.
Further, the three-level indirect condensing system has refrigeration cycle operating condition and defrosting state of cyclic operation, in which:
Refrigeration cycle operating condition: high-temperature level refrigeration agent forms high temperature and high pressure gas after the compression of three-level high temperature compressor, passes through
After crossing three-level high temperature oil eliminator progress Oil-gas Separation, is cooled down into three-level condenser, form high pressure refrigerant liquid, simultaneously
Oil in high pressure refrigerant liquid returns to three-level high temperature compressor, and high pressure refrigerant liquid passes through three-level high temperature liquid storage device and three-level high temperature
After device for drying and filtering, reducing pressure by regulating flow is carried out into three-level high temperature expansion valve, then flows into evaporative condenser and freezes to low-temperature level
Agent returns to three-level high temperature compressor after carrying out cooling evaporation；Low-temperature level refrigerant forms high after the compression of three-level cryogenic compressor
Warm high pressure gas carries out tentatively cooling, formation high pressure into forecooler after three-level low temperature oil eliminator carries out Oil-gas Separation
Refrigerant liquid, while the oil in high pressure refrigerant liquid returns to three-level cryogenic compressor, the refrigerant after precooling enters steaming
The condenser that feels cold is cooled further to liquid, and high pressure refrigerant liquid is subcooled after three grade low-temp liquid storage devices into Recuperative heat exchanger
After cooling, after carrying out reducing pressure by regulating flow into three-level low-temperature expansion valve, flows into glacial epoch refrigerating medium plate heat exchanger and evaporate, by glacial epoch
Refrigerating medium is cooled to -75 DEG C, and the gaseous state low pressure refrigerant after low-temperature evaporation returns to three grade low-temp pressures after entering Recuperative heat exchanger reheating
Contracting machine completes three-level refrigerant autocascade cycle；Glacial epoch refrigerating medium is after the pump pressurization of glacial epoch, into glacial epoch refrigerating medium plate-type heat-exchange
It is cooled to -75 DEG C in device, enters to the first three-level evaporator by solenoid valve, by oil gas condensation to -70 DEG C, using threeway
Valve returns to glacial epoch pump by glacial epoch Constant pressure tank, completes the first three-level boiler channel glacial epoch refrigerating medium refrigeration cycle；Glacial epoch refrigerating
Agent is after the pump pressurization of glacial epoch, into being cooled to -75 DEG C in the refrigerating medium plate heat exchanger of glacial epoch, enters to the by solenoid valve
Two three-level evaporators, using triple valve, return to glacial epoch pump by glacial epoch Constant pressure tank, complete second by oil gas condensation to -70 DEG C
Three-level boiler channel glacial epoch refrigerating medium refrigeration cycle；
Defrosting state of cyclic operation: the glacial epoch refrigerating medium after the evaporation of the first three-level evaporator carries out flow by triple valve
After adjusting, a part of flow is returned directly to glacial epoch pump to be passed through after another part flow enters the heating of three-level defrosting plate heat exchanger
Triple valve enters the second three-level evaporator and carries out defrosting, and after defrosting, cooled glacial epoch refrigerating medium is by solenoid valve and previous portion
Shunt volume converges together returns to glacial epoch pump, completes the second three-level boiler channel defrosting circulation；It is steamed by the second three-level evaporator
Glacial epoch refrigerating medium after hair, after carrying out flow adjusting by triple valve, a part of flow is returned directly to glacial epoch pump, another part stream
After amount enters the heating of three-level defrosting plate heat exchanger, enters the first three-level evaporator by triple valve and carry out defrosting, after defrosting, quilt
Cooling glacial epoch refrigerating medium converges together with front portion flow by solenoid valve returns to glacial epoch pump, completes the first three-level evaporator
Channel defrosting circulation.
Further, the waste cold recovery system includes the first pneumatic operated valve and the second pneumatic operated valve, cold from the first three-level evaporator
- 70 DEG C of low temperature oil gas after solidifying enter a waste cold by the first pneumatic operated valve and recycle heat exchanger, from the second three-level evaporator condensation
- 70 DEG C of low temperature oil gas afterwards enter a waste cold by the second pneumatic operated valve and recycle heat exchanger, by second level ethylene glycol solution refrigerating medium
Temperature is reduced to -30 DEG C, while low temperature oil gas is warming up to -35 DEG C, enters back into secondary waste cold recycling heat exchanger and 35 DEG C of import
High-temperature oil gas exchanges heat, and import high-temperature oil gas is down to 25 DEG C, and low-temperature oil gas is warming up to 5 DEG C.
The utility model has the advantages that the utility model discloses a kind of indirect condensing formula petroleum vapor recovery unit with from the function that defrosts,
Compared with prior art, have it is below the utility model has the advantages that
(1) direct-expansion type Refrigeration Technique and indirect condensing technology are organically combined, the second level and the third level are easy to freeze and coagulate
Solid system, because exist refrigeration and defrosting mode switching, easily occur leading to low pressure and oil starvation problem because of the migration of refrigerant, and
Using indirect condensing formula technology, so that compressor refrigerant system is in single refrigeration cycle always, refrigeration is thoroughly avoided
Migration problem, and then solve the problems, such as system low-voltage and compressor oil starvation, substantially increase condensation unit reliability of operation.
(2) second level and third level low-temperature zone are had to the refrigerant of inside and outside High Pressure Difference, only circulated in the copper pipe of welding,
Without entering in the stainless steel pipes with flanged joint, thoroughly solve in refrigerant cold operation, because of flange and connector
The difference of the coefficient of expansion and inside and outside High Pressure Difference, so as to cause refrigerant leakage problem.Meanwhile second level ethylene glycol solution refrigerating medium
It is usually run under normal pressure with three-level glacial epoch secondary refrigerant system, inside and outside differential pressure very little is not easy to leak.
(3) high temperature of compressor is utilized by the switching of each solenoid valve in refrigerating medium pipeline using from defrosting control technology
Refrigerant heat effectively defrosts to the boiler channel that is blocked, and realizes that the pre-cooling of single evaporator channel, an evaporator are logical simultaneously
Another boiler channel refrigeration of road defrosting and two boiler channels while refrigeration mode, to cope with the various function in petroleum vapor recovery scene
It can demand.
(4) use two-stage waste cold recovery technology, the same second level of low temperature cold oil gas tail gas for three-level being discharged by a heat exchanger
Ethylene glycol solution secondary refrigerant system carries out heat exchange recycling, realizes a waste cold recycling；It will be carried again from second level by another heat exchanger
Tail gas and initial import high-temperature oil gas after the heat exchange of cryogen system carry out secondary waste cold recycling.Effective benefit of waste cold recovery technology
With reducing the configuration power of compressor.
Detailed description of the invention
Fig. 1 is the schematic diagram of the indirect condensing formula petroleum vapor recovery unit of the utility model.
Specific embodiment
The technical solution of the utility model is further introduced With reference to embodiment.
Present embodiment disclose it is a kind of with from the indirect condensing formula petroleum vapor recovery unit of defrosting function, including by
Level-one direct-expansion type condenser system, second level indirect condensing system, three-level indirect condensing system and the waste cold recycling of oil-gas pipeline connection
System, in which:
Level-one direct-expansion type condenser system: the most of moisture and high boiling in removal oil gas is directly condensed by refrigerant
Oil-gas component.
Second level indirect condensing system: including two-stage compression machine cooling system and ethylene glycol solution secondary refrigerant system, pass through second
Two-stage compression machine cooling system is connected by glycol refrigerating medium plate heat exchanger with ethylene glycol solution secondary refrigerant system, using cooled
The further condensed oil-gas of ethylene glycol solution secondary refrigerant system.
Three-level indirect condensing system: it including three-level cascade refrigeration agent system and glacial epoch secondary refrigerant system, is carried by glacial epoch
Three-level cascade refrigeration agent system is connected by cryogen plate heat exchanger with glacial epoch secondary refrigerant system, utilizes cooled glacial epoch refrigerating
Agent system is by oil gas condensation to final process temperature.
Waste cold recovery system: the low temperature cold oil gas that heat exchanger discharges three-level indirect condensing system is recycled by a waste cold
Tail gas and ethylene glycol solution secondary refrigerant system carry out heat exchange recycling, then recycling heat exchanger by secondary waste cold will be from ethylene glycol solution
Tail gas and initial import high-temperature oil gas after secondary refrigerant system heat exchange carry out secondary waste cold recycling.
As shown in Figure 1, level-one direct-expansion type condenser system includes stage compressor, refrigerant is compressed by stage compressor 1
After form high temperature and high pressure gas, cooled down by first-stage condenser 2, formed high pressure refrigerant liquid, high pressure refrigerant liquid pass through
Liquid storage device 3 flows into 4 dry filter of device for drying and filtering, carries out reducing pressure by regulating flow subsequently into one-stage expansion valve 6, enters back into evaporator 7
By oil gas condensation to 5 DEG C, stage compressor 1 is returned to after being then passed through 5 reheating of the first gas-liquid separator.
Two-stage compression machine cooling system include split-compressor 8 in Fig. 1, second level oil eliminator 9, secondary condenser 10,
Solenoid valve 11, second level liquid storage device 12, secondary drying filter 13, the second gas-liquid separator 14, compound expansion valve 15 and ethylene glycol
Solution refrigerating medium plate heat exchanger 16.Ethylene glycol solution secondary refrigerant system includes second level defrosting plate heat exchanger 19 in Fig. 1, second
Glycol pump 20, ethylene glycol Constant pressure tank 21, triple valve 22, solenoid valve 23, the first secondary evaporimeter 24, the second secondary evaporimeter 25,
Solenoid valve 26, solenoid valve 27 and triple valve 28.
As shown in Figure 1, second level indirect condensing system has refrigeration cycle operating condition and defrosting state of cyclic operation, in which:
Refrigeration cycle operating condition: refrigerant forms high temperature and high pressure gas after the compression of split-compressor 8, by second level oil
It after carrying out Oil-gas Separation from device 9, is cooled down into secondary condenser 10, forms high pressure refrigerant liquid, while high pressure refrigerant liquid
Oil in body returns to split-compressor 8, and high pressure refrigerant liquid passes through after second level liquid storage device 12 and secondary drying filter 13
Second gas-liquid separator 14 carries out supercooling cooling, carries out reducing pressure by regulating flow subsequently into compound expansion valve 15, then flows into ethylene glycol
Low-temperature evaporation is carried out in solution refrigerating medium plate heat exchanger 16, ethylene glycol solution refrigerating medium is cooled to -25 DEG C, after low-temperature evaporation
Gaseous state low pressure refrigerant enter 14 reheating of the second gas-liquid separator after return to split-compressor 8, complete secondary refrigerant circulation；
Ethylene glycol solution refrigerating medium is after the pressurization of eg pump 20, into cooling down in ethylene glycol solution refrigerating medium plate heat exchanger 16
To -25 DEG C, -30 DEG C are further cooled to using a waste cold recycling heat exchanger 65, enters the first second level by solenoid valve 29
Evaporator 24, using triple valve 22, returns to eg pump 20 by ethylene glycol Constant pressure tank 21 by oil gas condensation to -25 DEG C, complete
At 24 channel ethylene glycol solution refrigerating medium refrigeration cycle of the first secondary evaporimeter；Ethylene glycol solution refrigerating medium passes through eg pump 20
After pressurization, into being cooled to -25 DEG C in ethylene glycol solution refrigerating medium plate heat exchanger 16, heat exchanger is recycled using a waste cold
65 are further cooled to -30 DEG C, enter the second secondary evaporimeter 25 by solenoid valve 27, by oil gas condensation to -25 DEG C, using
Triple valve 28 returns to eg pump 20 by ethylene glycol Constant pressure tank 21, completes 25 channel ethylene glycol solution of the second secondary evaporimeter
Refrigerating medium refrigeration cycle；
Defrosting state of cyclic operation: the ethylene glycol solution refrigerating medium after the evaporation of the first secondary evaporimeter 24 passes through triple valve 22
Flow adjusting is carried out, a part of flow is returned directly to eg pump 20, and another part flow enters second level defrosting plate heat exchanger
After 19 heating, enters the second secondary evaporimeter 25 by triple valve 28 and carry out defrosting, after defrosting, cooled eth.glycol
Eg pump 20 is convergeed to together with front portion flow by solenoid valve 27, is completed the 25 channel defrosting of the second secondary evaporimeter and is followed
Ring；By the second secondary evaporimeter 25 evaporation after ethylene glycol solution refrigerating medium by triple valve 28 carry out flow adjusting, one
Shunt volume is returned directly to eg pump 20, after another part flow enters the heating of second level defrosting plate heat exchanger 19, by threeway
Valve 22 enters the first secondary evaporimeter 24 and carries out defrosting, and after defrosting, cooled eth.glycol is by solenoid valve 23 with before
A part of flow converges to eg pump 20 together, completes 24 channel defrosting of the first secondary evaporimeter circulation.
Three-level cascade refrigeration agent system include three-level cryogenic compressor 30 in Fig. 1, three-level low temperature oil eliminator 31,
Forecooler 32, solenoid valve 33, glacial epoch refrigerating medium plate heat exchanger 47, three-level low-temperature expansion valve 48, three-level low temperature drying filter
49, Recuperative heat exchanger 50, solenoid valve 51, expansion drum 52, three grade low-temp liquid storage devices 53, evaporative condenser 54, three-level are high temperature compressed
Machine 55, three-level high temperature oil eliminator 56, three-level condenser 57, three-level high temperature liquid storage device 58,59 and of three-level high temperature drying filter
Three-level high temperature expansion valve 60.Glacial epoch secondary refrigerant system includes three-level defrosting plate heat exchanger 36, triple valve 37, electromagnetism in Fig. 1
Valve 38, the first three-level evaporator 39, the second three-level evaporator 40, solenoid valve 41, solenoid valve 42, solenoid valve 43, triple valve 44, ice
River Constant pressure tank 45, glacial epoch pump 46 and glacial epoch refrigerating medium plate heat exchanger 47.
As shown in Figure 1, three-level indirect condensing system has refrigeration cycle operating condition and defrosting state of cyclic operation, in which:
Refrigeration cycle operating condition: high-temperature level refrigeration agent forms high temperature and high pressure gas after the compression of three-level high temperature compressor 55,
It after three-level high temperature oil eliminator 56 carries out Oil-gas Separation, is cooled down into three-level condenser 57, forms high pressure refrigerant liquid
Body, while the oil in high pressure refrigerant liquid returns to three-level high temperature compressor 55, high pressure refrigerant liquid passes through three-level high temperature liquid storage device
58 and three-level high temperature drying filter 59 after, into three-level high temperature expansion valve 60 carry out reducing pressure by regulating flow, then flow into evaporative condenser
Three-level high temperature compressor 55 is returned to after carrying out cooling evaporation to low-temperature level refrigerant in device 54；Low-temperature level refrigerant is low by three-level
Warm compressor 30 forms high temperature and high pressure gas after compressing, after three-level low temperature oil eliminator 31 carries out Oil-gas Separation, into pre-
Cooler 32 is tentatively cooled down, and forms high pressure refrigerant liquid, while the oil in high pressure refrigerant liquid returns to three-level cryogenic compressor
30, the refrigerant after precooling enters evaporative condenser 54 and is cooled further to liquid, and high pressure refrigerant liquid passes through three-level
After low temperature liquid storage device 53, into after the supercooling cooling of Recuperative heat exchanger 50, reducing pressure by regulating flow is carried out into three-level low-temperature expansion valve 48
Afterwards, it flows into glacial epoch refrigerating medium plate heat exchanger 47 and evaporates, glacial epoch refrigerating medium is cooled to -75 DEG C, the gaseous state after low-temperature evaporation
Low pressure refrigerant returns to three-level cryogenic compressor 30 after entering 50 reheating of Recuperative heat exchanger, completes three-level refrigerant autocascade cycle；Ice
River refrigerating medium is after 46 pressurization of glacial epoch pump, into being cooled to -75 DEG C in glacial epoch refrigerating medium plate heat exchanger 47, by solenoid valve
43 enter to the first three-level evaporator 39, by oil gas condensation to -70 DEG C, using triple valve 37, are returned by glacial epoch Constant pressure tank 45
46 are pumped to glacial epoch, completes 39 channel glacial epoch refrigerating medium refrigeration cycle of the first three-level evaporator；Glacial epoch refrigerating medium is by glacial epoch pump 46
After pressurization, into being cooled to -75 DEG C in glacial epoch refrigerating medium plate heat exchanger 47, the second three-level is entered to by solenoid valve 41 and is steamed
Device 40 is sent out, by oil gas condensation to -70 DEG C, using triple valve 44, glacial epoch pump 46 is returned to by glacial epoch Constant pressure tank 45, completes second
40 channel glacial epoch refrigerating medium refrigeration cycle of three-level evaporator；
Defrosting state of cyclic operation: the glacial epoch refrigerating medium after the evaporation of the first three-level evaporator 39 is carried out by triple valve 37
After flow is adjusted, a part of flow is returned directly to glacial epoch pump 46, and another part flow enters three-level defrosting plate heat exchanger 36 and adds
After heat, enter the second three-level evaporator 40 by triple valve 44 and carry out defrosting, after defrosting, cooled glacial epoch refrigerating medium is by electricity
Magnet valve 42 converges together with front portion flow returns to glacial epoch pump 46, completes 40 channel defrosting of the second three-level evaporator circulation；Through
Glacial epoch refrigerating medium after crossing the evaporation of the second three-level evaporator 40, after carrying out flow adjusting by triple valve 44, a part of flow is straight
It takes back to glacial epoch and pumps 46, another part flow enters after three-level defrosting plate heat exchanger 36 heats, and enters the by triple valve 37
One three-level evaporator 39 carries out defrosting, and after defrosting, cooled glacial epoch refrigerating medium is by solenoid valve 38 and front portion flow one
It rises to converge and returns to glacial epoch pump 46, complete 39 channel defrosting of the first three-level evaporator circulation.
As shown in Figure 1, waste cold recovery system includes the first pneumatic operated valve 63 and the second pneumatic operated valve 64, from the first three-level evaporator
39 condensed -70 DEG C of low temperature oil gas enter a waste cold by the first pneumatic operated valve 63 and recycle heat exchanger 65, steam from the second three-level
It sends out condensed -70 DEG C of low temperature oil gas of device 40 and enters a waste cold recycling heat exchanger 65 by the second pneumatic operated valve 64, by second level second
Glycol solution refrigerant temperature is reduced to -30 DEG C, while low temperature oil gas is warming up to -35 DEG C, enters back into secondary waste cold recycling and changes
Hot device 68 exchanges heat with 35 DEG C of high-temperature oil gas of import, and import high-temperature oil gas is down to 25 DEG C, and low-temperature oil gas is warming up to 5 DEG C.
In the utility model, organically combined by level-one direct-expansion type condenser system and second level, three-level indirect condensing formula system
It realizes that level-one is condensed to 5 DEG C, -25 DEG C of B-grade condensation and three-level respectively and condenses -70 DEG C, and then realize and liquefy back to the step of oil gas
It receives, oil gas recovery rate is up to 90% or more.
Level-one condensation temperature is relatively high, and there's almost no icing and solidification leads to channel blockage, and therefore, level-one direct-expansion type is cold
Solidifying system uses an evaporator, realizes single channel operation, uses binary channels evaporator relative to traditional level-one, system is more
Succinctly.
B-grade condensation and three-level condensation temperature are relatively low, and icing and solidification is be easy to cause to lead to channel blockage, therefore, two
Grade and three-level are all made of two evaporators, realize binary channels operation, when a channel blockage, with another channel, meanwhile, it blocks up
It fills in Channel Synchronous and carries out defrosting dredging.
B-grade condensation and three-level condenser system are all made of indirect condensing mode, and refrigerant system is in single refrigeration cycle always
Mode, the switchover operation of the various modes such as refrigeration mode, pre-cooling mode, the defrosting mode in oil gas evaporation device channel, by two, three
Grade secondary refrigerant system by coolant pump and regulating valve control realize, i.e., refrigerating medium carried out in two microchannel evaporators distribution and
It is low to completely avoid compressor caused by traditional distribution and circulation because of refrigerant in different microchannel evaporators for circular treatment
Pressure is shut down and compressor oil starvation burnout problems, substantially increases condensing type oil gas recycling unit reliability of operation.
Claims (5)
1. having the indirect condensing formula petroleum vapor recovery unit from the function that defrosts, it is characterised in that: including what is connected by oil-gas pipeline
Level-one direct-expansion type condenser system, second level indirect condensing system, three-level indirect condensing system and waste cold recovery system, in which:
Level-one direct-expansion type condenser system: the most of moisture in removal oil gas and high boiling oil gas are directly condensed by refrigerant
Component；
Second level indirect condensing system: including two-stage compression machine cooling system and ethylene glycol solution secondary refrigerant system, pass through ethylene glycol
Two-stage compression machine cooling system is connected by refrigerating medium plate heat exchanger with ethylene glycol solution secondary refrigerant system, utilizes cooled second
The further condensed oil-gas of glycol solution secondary refrigerant system；
Three-level indirect condensing system: including three-level cascade refrigeration agent system and glacial epoch secondary refrigerant system, pass through glacial epoch refrigerating medium
Three-level cascade refrigeration agent system is connected by plate heat exchanger with glacial epoch secondary refrigerant system, utilizes cooled glacial epoch refrigerating medium system
It unites oil gas condensation to final process temperature；
Waste cold recovery system: the low temperature cold oil gas tail gas that heat exchanger discharges three-level indirect condensing system is recycled by a waste cold
Heat exchange recycling is carried out with ethylene glycol solution secondary refrigerant system, then recycling heat exchanger by secondary waste cold will be from ethylene glycol solution refrigerating
Tail gas and initial import high-temperature oil gas after the heat exchange of agent system carry out secondary waste cold recycling.
2. the indirect condensing formula petroleum vapor recovery unit according to claim 1 having from the function that defrosts, it is characterised in that: institute
Stating level-one direct-expansion type condenser system includes stage compressor, and refrigerant forms high temperature and pressure after stage compressor (1) is compressed
Gas is cooled down by first-stage condenser (2), forms high pressure refrigerant liquid, and high pressure refrigerant liquid is flowed by liquid storage device (3)
Device for drying and filtering (4) dry filter carries out reducing pressure by regulating flow subsequently into one-stage expansion valve (6), enters back into evaporator (7) for oil gas
Condensation returns to stage compressor (1) after being then passed through the first gas-liquid separator (5) reheating to 5 DEG C.
3. the indirect condensing formula petroleum vapor recovery unit according to claim 1 having from the function that defrosts, it is characterised in that: institute
Second level indirect condensing system is stated with refrigeration cycle operating condition and defrosting state of cyclic operation, in which:
Refrigeration cycle operating condition: refrigerant forms high temperature and high pressure gas after split-compressor (8) are compressed, and separates by second level oil
It after device (9) carries out Oil-gas Separation, is cooled down into secondary condenser (10), forms high pressure refrigerant liquid, while high pressure refrigerant
Oil in liquid returns to split-compressor (8), and high pressure refrigerant liquid passes through second level liquid storage device (12) and secondary drying filter
(13) after, supercooling cooling is carried out by the second gas-liquid separator (14), carries out reducing pressure by regulating flow subsequently into compound expansion valve (15),
It then flows into and carries out low-temperature evaporation in ethylene glycol solution refrigerating medium plate heat exchanger (16), ethylene glycol solution refrigerating medium is cooling
To -25 DEG C, the gaseous state low pressure refrigerant after low-temperature evaporation returns to split-compressor after entering the second gas-liquid separator (14) reheating
(8), secondary refrigerant circulation is completed；Ethylene glycol solution refrigerating medium is after eg pump (20) pressurize, into ethylene glycol solution
Refrigerating medium plate heat exchanger is cooled to -25 DEG C in (16), is further cooled to -30 using waste cold recycling heat exchanger (65)
DEG C, enter the first secondary evaporimeter (24) by solenoid valve (29), by oil gas condensation to -25 DEG C, using triple valve (22), leads to
It crosses ethylene glycol Constant pressure tank (21) to return to eg pump (20), completes the first secondary evaporimeter (24) channel ethylene glycol solution refrigerating medium
Refrigeration cycle；Ethylene glycol solution refrigerating medium is after eg pump (20) pressurize, into ethylene glycol solution refrigerating medium plate-type heat-exchange
Device is cooled to -25 DEG C in (16), -30 DEG C is further cooled to using waste cold recycling heat exchanger (65), by solenoid valve
(26) enter the second secondary evaporimeter (25), by oil gas condensation to -25 DEG C, using triple valve (28), pass through ethylene glycol level pressure
Tank (21) returns to eg pump (20), completes the second secondary evaporimeter (25) channel ethylene glycol solution refrigerating medium refrigeration cycle；
Defrosting state of cyclic operation: the ethylene glycol solution refrigerating medium after the first secondary evaporimeter (24) evaporation passes through triple valve (22)
Flow adjusting is carried out, a part of flow is returned directly to eg pump (20), and another part flow enters second level defrosting plate-type heat-exchange
After device (19) heating, enters the second secondary evaporimeter (25) by triple valve (28) and carry out defrosting, after defrosting, cooled second two
Alcohol refrigerating medium converges to eg pump (20) by solenoid valve (27) together with front portion flow, completes the second secondary evaporimeter
(25) channel defrosting recycles；Ethylene glycol solution refrigerating medium after the second secondary evaporimeter (25) evaporation passes through triple valve (28)
Flow adjusting is carried out, a part of flow is returned directly to eg pump (20), and another part flow enters second level defrosting plate-type heat-exchange
After device (19) heating, enters the first secondary evaporimeter (24) by triple valve (22) and carry out defrosting, after defrosting, cooled second two
Alcohol refrigerating medium converges to eg pump (20) by solenoid valve (23) together with front portion flow, completes the first secondary evaporimeter
(24) channel defrosting recycles.
4. the indirect condensing formula petroleum vapor recovery unit according to claim 1 having from the function that defrosts, it is characterised in that: institute
Three-level indirect condensing system is stated with refrigeration cycle operating condition and defrosting state of cyclic operation, in which:
Refrigeration cycle operating condition: high-temperature level refrigeration agent forms high temperature and high pressure gas after three-level high temperature compressor (55) are compressed, and passes through
After crossing three-level high temperature oil eliminator (56) progress Oil-gas Separation, is cooled down into three-level condenser (57), form high pressure refrigerant
Liquid, while the oil in high pressure refrigerant liquid returns to three-level high temperature compressor (55), high pressure refrigerant liquid is stored up by three-level high temperature
After liquid device (58) and three-level high temperature drying filter (59), reducing pressure by regulating flow is carried out into three-level high temperature expansion valve (60), is then flowed
Enter and returns to three-level high temperature compressor (55) after carrying out cooling evaporation to low-temperature level refrigerant in evaporative condenser (54)；Low-temperature level system
Cryogen forms high temperature and high pressure gas after three-level cryogenic compressor (30) are compressed, and carries out by three-level low temperature oil eliminator (31)
After Oil-gas Separation, tentatively cooling, formation high pressure refrigerant liquid, while the oil in high pressure refrigerant liquid are carried out into forecooler (32)
Three-level cryogenic compressor (30) are returned to, the refrigerant after precooling enters evaporative condenser (54) and is cooled further to liquid
Body, high pressure refrigerant liquid is after three grade low-temp liquid storage devices (53), into after Recuperative heat exchanger (50) supercooling cooling, into three-level
After low-temperature expansion valve (48) carries out reducing pressure by regulating flow, evaporation in glacial epoch refrigerating medium plate heat exchanger (47) is flowed into, by glacial epoch refrigerating medium
- 75 DEG C are cooled to, the gaseous state low pressure refrigerant after low-temperature evaporation returns to three-level low temperature compression after entering Recuperative heat exchanger (50) reheating
Machine (30) completes three-level refrigerant autocascade cycle；Glacial epoch refrigerating medium is after glacial epoch pump (46) pressurization, into glacial epoch refrigerating medium plate
Formula heat exchanger is cooled to -75 DEG C in (47), the first three-level evaporator (39) is entered to by solenoid valve (43), by oil gas condensation
To -70 DEG C, using triple valve (37), glacial epoch pump (46) is returned to by glacial epoch Constant pressure tank (45), completes the first three-level evaporator
(39) channel glacial epoch refrigerating medium refrigeration cycle；Glacial epoch refrigerating medium is board-like into glacial epoch refrigerating medium after glacial epoch pump (46) pressurization
Heat exchanger is cooled to -75 DEG C in (47), enters to the second three-level evaporator (40) by solenoid valve (41), by oil gas condensation to -
70 DEG C, using triple valve (44), glacial epoch pump (46) is returned to by glacial epoch Constant pressure tank (45), completes the second three-level evaporator (40)
Channel glacial epoch refrigerating medium refrigeration cycle；
Defrosting state of cyclic operation: the glacial epoch refrigerating medium after the evaporation of the first three-level evaporator (39) is carried out by triple valve (37)
After flow is adjusted, a part of flow is returned directly to glacial epoch pump (46), and another part flow enters three-level defrosting plate heat exchanger
(36) after heating, enter the second three-level evaporator (40) by triple valve (44) and carry out defrosting, after defrosting, cooled glacial epoch is carried
Cryogen converges together with front portion flow by solenoid valve (42) returns to glacial epoch pump (46), completes the second three-level evaporator (40)
Channel defrosting circulation；Glacial epoch refrigerating medium after the evaporation of the second three-level evaporator (40) carries out flow by triple valve (44)
After adjusting, a part of flow is returned directly to glacial epoch pump (46), and another part flow enters three-level defrosting plate heat exchanger (36) and adds
After heat, enters the first three-level evaporator (39) by triple valve (37) and carry out defrosting, after defrosting, cooled glacial epoch refrigerating medium warp
Cross solenoid valve (38) converge together with front portion flow return to glacial epoch pump (46), complete first three-level evaporator (39) channel melt
Frost circulation.
5. the indirect condensing formula petroleum vapor recovery unit according to claim 4 having from the function that defrosts, it is characterised in that: institute
Stating waste cold recovery system includes the first pneumatic operated valve (63) and the second pneumatic operated valve (64), after the condensation of the first three-level evaporator (39)
- 70 DEG C of low temperature oil gas enter waste cold by the first pneumatic operated valve (63) and recycle heat exchanger (65), from the second three-level evaporator
(40) condensed -70 DEG C of low temperature oil gas enters waste cold recycling heat exchanger (65) by the second pneumatic operated valve (64), by second level
Ethylene glycol solution refrigerant temperature is reduced to -30 DEG C, while low temperature oil gas is warming up to -35 DEG C, enters back into secondary waste cold recycling
Heat exchanger (68) exchanges heat with 35 DEG C of high-temperature oil gas of import, and import high-temperature oil gas is down to 25 DEG C, and low-temperature oil gas is warming up to 5 DEG C.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109157861A (en) * | 2018-09-29 | 2019-01-08 | 南京五洲制冷集团有限公司 | With the indirect condensing formula petroleum vapor recovery unit from the function that defrosts |
| CN112870752A (en) * | 2021-01-20 | 2021-06-01 | 广东申菱环境系统股份有限公司 | Cold-carrying type oil gas recovery device |
| CN112891980A (en) * | 2021-01-20 | 2021-06-04 | 广东申菱环境系统股份有限公司 | Oil gas recovery device and control method |
| CN112920833A (en) * | 2021-04-20 | 2021-06-08 | 南京久鼎制冷空调设备有限公司 | Multistage condensation oil gas recovery system based on secondary refrigerant |
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2018
- 2018-09-29 CN CN201821607189.0U patent/CN209392767U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109157861A (en) * | 2018-09-29 | 2019-01-08 | 南京五洲制冷集团有限公司 | With the indirect condensing formula petroleum vapor recovery unit from the function that defrosts |
| CN109157861B (en) * | 2018-09-29 | 2024-02-06 | 南京五洲制冷集团有限公司 | Indirect condensation type oil gas recovery unit with self-defrosting function |
| CN112870752A (en) * | 2021-01-20 | 2021-06-01 | 广东申菱环境系统股份有限公司 | Cold-carrying type oil gas recovery device |
| CN112891980A (en) * | 2021-01-20 | 2021-06-04 | 广东申菱环境系统股份有限公司 | Oil gas recovery device and control method |
| CN112920833A (en) * | 2021-04-20 | 2021-06-08 | 南京久鼎制冷空调设备有限公司 | Multistage condensation oil gas recovery system based on secondary refrigerant |
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