CN114608266A - Oil gas recovery device capable of rapidly refrigerating and defrosting - Google Patents
Oil gas recovery device capable of rapidly refrigerating and defrosting Download PDFInfo
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- CN114608266A CN114608266A CN202210178969.2A CN202210178969A CN114608266A CN 114608266 A CN114608266 A CN 114608266A CN 202210178969 A CN202210178969 A CN 202210178969A CN 114608266 A CN114608266 A CN 114608266A
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- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 238000010257 thawing Methods 0.000 title claims description 37
- 239000003507 refrigerant Substances 0.000 claims abstract description 136
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000001816 cooling Methods 0.000 claims description 33
- 238000005057 refrigeration Methods 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000002826 coolant Substances 0.000 abstract description 51
- 239000004215 Carbon black (E152) Substances 0.000 abstract description 5
- 229930195733 hydrocarbon Natural products 0.000 abstract description 5
- 150000002430 hydrocarbons Chemical class 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000005494 condensation Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 54
- 239000007789 gas Substances 0.000 description 44
- 239000010779 crude oil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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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
- 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
- F25J1/0225—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 other external refrigeration means not provided before, e.g. heat driven absorption chillers
- F25J1/0227—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 other external refrigeration means not provided before, e.g. heat driven absorption chillers within a refrigeration cascade
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0262—Details of the cold heat exchange system
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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
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0298—Safety aspects and control of the refrigerant compression system, e.g. anti-surge control
-
- 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
- F25J2270/00—Refrigeration techniques used
- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
A kind of oil gas recovery unit that can refrigerate fast, defrost, the last compressor refrigerant of the refrigerating system exchanges heat with the coolant in the evaporator, thus cool the coolant to the temperature that the condensation oil gas needs. The secondary refrigerant is stored in the secondary refrigerant storage tank and enters the last stage cold box to exchange heat with the oil gas under the action of the secondary refrigerant pump, so that the temperature of the oil gas is reduced, and the hydrocarbon is changed from a gaseous state to a liquid state. Untreated oil gas sequentially passes through all stages of cold boxes to the last stage of cold box from front to back under the action of an oil-gas induced draft fan, exchanges heat with secondary refrigerant, sequentially enters all stages of cold boxes forwards after reaching the temperature required by the system, and exchanges heat with hot oil gas flowing in front in all stages of cold boxes. The invention can completely defrost in a short time, when the channel is switched, the cold box has no temperature fluctuation, the system can be kept to efficiently recover the oil gas, and the resource waste and the environmental pollution are reduced as much as possible.
Description
Technical Field
The invention belongs to the technical field of wharf and ship waste gas treatment, and particularly relates to an oil gas recovery device capable of quickly refrigerating and defrosting.
Background
The rapid development of the transportation of the ship oil goods greatly meets the development requirements of the economic society, but also brings Volatile Organic pollutants (VOC) of oil gas, and the Volatile Organic Compounds of the oil gas pollute the atmosphere.
The ship transportation of crude oil is the most important transportation mode of crude oil import in China, and the crude oil generates high-concentration and large-treatment-capacity oil and gas emission in transportation and wharf ship loading operation, so that huge economic loss is caused, environmental pollution is caused in oceans and areas around the wharf, and potential safety hazards are brought to production and life.
As the oil gas recovery device in port and wharf is gaining attention, the application of the oil gas recovery device in the crude oil transportation vessel will become necessary and urgent, and the oil gas recovery device will become an indispensable matching device on the crude oil transportation vessel. The problem that the oil gas recovery system of a crude oil transportation ship, which has independent intellectual property rights, is mature, reliable, safe and efficient, is researched from the aspect of mandatory constraints of rules and regulations at home and abroad and from the aspect of practical requirements of safety, environmental protection and energy conservation, is currently mainly solved, most of the oil gas recovery devices which are applied at present cannot continuously and efficiently recover oil gas, and the design effect cannot be achieved in about 30% of the time, so that the invention provides the oil gas recovery device capable of rapidly refrigerating and defrosting, and the device can be ensured to continuously and efficiently work.
Disclosure of Invention
1. The technical problem to be solved is as follows:
the existing oil gas recovery device can not carry out oil gas recovery continuously and efficiently, and the design effect can not be achieved in about 30% of time.
2. The technical scheme is as follows:
in order to solve the problems, the invention provides an oil gas recovery device capable of rapidly refrigerating and defrosting, which comprises two groups of cooling boxes, namely a channel A cooling box group and a channel B cooling box group, wherein each group is provided with a plurality of cooling boxes which are connected in series, an oil gas inlet is provided with an oil gas draught fan, the oil gas draught fan is divided into two paths, one path is connected with a first inlet of a first cooling box of the channel B cooling box group through a channel B air inlet valve, the other path is connected with a first inlet of the first cooling box of the channel A cooling box group through a channel A air inlet valve, a channel B air outlet valve is arranged at an air outlet of the first cooling box of the channel B cooling box group, a channel A air outlet valve is arranged at an air outlet of the first cooling box of the channel A cooling box group, a circulating fan is also arranged, a channel B circulating valve is arranged between the circulating fan and a second inlet of the first cooling box of the channel B cooling box group, the circulating fan and a second circulating valve of the first cooling box of the channel A cooling box group are arranged between the channel A circulating valve and a second inlet of the channel A cooling box group, the refrigerating system is respectively connected with the evaporator and the secondary refrigerant heater, a secondary refrigerant outlet of the evaporator is connected with a secondary refrigerant inlet of the secondary refrigerant storage tank, a secondary refrigerant pump is arranged at the secondary refrigerant outlet of the secondary refrigerant storage tank, the secondary refrigerant is divided into two paths after passing through the secondary refrigerant pump, one path enters the last cold box of the cold box group of the channel B through the first secondary refrigerant inlet valve, and then returns to the evaporator through the first secondary refrigerant outlet valve; one path of refrigerant enters the last cold box of the channel A cold box group through the second secondary refrigerant inlet valve and then returns to the evaporator through the second secondary refrigerant outlet valve, and the refrigerant in the refrigerant passes through the heat pump after heat exchange of the secondary refrigerant heater, then is divided into two paths, then enters the last cold box of the channel B cold box group through the first secondary refrigerant defrosting inlet valve and then returns to the secondary refrigerant heater through the first secondary refrigerant defrosting outlet valve; and the other path of the cold water enters the last cold box of the channel A cold box group through a second secondary refrigerant defrosting inlet valve and returns to the secondary refrigerant heater through a second secondary refrigerant defrosting outlet valve.
The first secondary refrigerant inlet valve, the second secondary refrigerant inlet valve, the first secondary refrigerant outlet valve and the second secondary refrigerant outlet valve are all regulating valves.
Two secondary refrigerant emptying valves are arranged between the last cold box of the channel B and the secondary refrigerant storage tank and are respectively a first secondary refrigerant emptying valve and a second secondary refrigerant emptying valve, and two secondary refrigerant emptying valves are arranged between the last cold box of the channel B and the secondary refrigerant storage tank and are respectively a third secondary refrigerant emptying valve and a fourth secondary refrigerant emptying valve.
An oil outlet is arranged below each cold box and connected with the liquid storage box, and an oil pump is arranged at the outlet of the liquid storage box.
And a secondary refrigerant expansion tank is arranged at the secondary refrigerant inlet of the secondary refrigerant heater.
3. Has the beneficial effects that:
the invention provides an oil gas recovery device capable of rapidly refrigerating and defrosting, which takes secondary refrigerant as an intermediate medium, utilizes the heat of high-temperature refrigerant to heat the secondary refrigerant to a certain temperature, and can continuously heat frost. Thereby achieving thorough defrosting in a short time. After defrosting is finished, the valve acts to enable the low-temperature secondary refrigerant to enter the idle passage cold box to build a cold field, and when the passages are switched, the cold box has no temperature fluctuation, so that the system can be kept to efficiently recover oil gas, and resource waste and environmental pollution are reduced as much as possible.
Drawings
Fig. 1 is an overall view of the present invention.
Description of reference numerals: 1. a cryogenic cascade refrigeration system; 2. an evaporator; 3. a secondary refrigerant storage tank; 4. a coolant pump; 5. a secondary refrigerant expansion tank; 6. a coolant heater; 7. a heat pump; 8. an oil gas cooling box; 9. a circulating fan; 10. an oil gas induced draft fan; 11. a liquid storage tank; 12. an oil pump; 13. a passage B intake valve; 14. a channel B circulates the valve; 15. the channel A circulates the valve; 16. a channel A gas outlet valve; 17. a channel A air inlet valve; 18. a channel B gas outlet valve; 19. a first coolant drain valve; 20. a first coolant outlet valve; 21. a first coolant inlet valve; 22. a second coolant drain valve; 23. a first coolant defrost outlet valve; 24. a third coolant drain valve; 25. a second coolant inlet valve; 26. a second coolant defrost outlet valve; 27. a second coolant outlet valve; 28. a fourth coolant drain valve; 29. a second coolant defrost inlet valve; 30. a first coolant defrost inlet valve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
As shown in figure 1, the oil gas recovery device capable of rapidly refrigerating and defrosting comprises two groups of cold boxes, namely a channel A cold box group and a channel B cold box group, wherein each group is provided with a plurality of cold boxes 8 which are connected in series, an oil gas inlet is provided with an oil gas draught fan 10, the oil gas draught fan 10 is divided into two paths, one path of the oil gas draught fan is connected with a first inlet of a first cold box 8 of the channel B cold box group through a channel B air inlet valve 13, the other path of the oil gas draught fan is connected with a first inlet of the first cold box 8 of the channel A cold box group through a channel A air inlet valve 17, an air outlet of the first cold box 8 of the channel B cold box group is provided with a channel B air outlet valve 18, an air outlet of the first cold box 8 of the channel A cold box group is provided with a channel A air outlet valve 16, a circulating fan 9 is further arranged, and a channel B circulating valve 14 is arranged between the circulating fan 9 and a second inlet of the first cold box 8 of the channel B cold box group, a channel A circulating valve 15 is arranged between the circulating fan 9 and a second inlet of a first cold box 8 of the channel A cold box group, the refrigeration system 1 is further included, the refrigeration system is respectively connected with the evaporator 2 and the secondary refrigerant heater 6, a secondary refrigerant outlet of the evaporator 2 is connected with a secondary refrigerant inlet of the secondary refrigerant storage tank 3, a secondary refrigerant pump 4 is arranged at a secondary refrigerant outlet of the secondary refrigerant storage tank 3, the secondary refrigerant is divided into two paths after passing through the secondary refrigerant pump 4, one path of secondary refrigerant enters the last cold box 8 of the channel B cold box group through a first secondary refrigerant inlet valve 21, and then returns to the evaporator 2 through a first secondary refrigerant outlet valve 20; one path of refrigerant enters the last cold box 8 of the channel A cold box set through a second secondary refrigerant inlet valve 25, then returns to the evaporator 2 through a second secondary refrigerant outlet valve 27, passes through the heat pump 7 after the heat exchange of the refrigerant in the secondary refrigerant heater 6, then is divided into two paths, then enters the last cold box 8 of the channel B cold box set through a first secondary refrigerant defrosting inlet valve 30, and returns to the secondary refrigerant heater 6 through a first secondary refrigerant defrosting outlet valve 23; the other path enters the last cold box 8 of the channel a cold box group through a second coolant defrosting inlet valve 29 and returns to the coolant heater 6 through a second coolant defrosting outlet valve 26.
The refrigerating system 1 is refrigerated by multiple stages of compressors in a cascade mode, and the refrigerant of the last stage of compressor exchanges heat with the secondary refrigerant in the evaporator 2, so that the secondary refrigerant is cooled to the temperature required by condensing oil gas. The secondary refrigerant is stored in the secondary refrigerant storage tank 3 and enters the last-stage cold box 8 to exchange heat with the oil gas under the action of the secondary refrigerant pump 4, so that the temperature of the oil gas is reduced, and the hydrocarbon reaches below the boiling point of the hydrocarbon and is changed into liquid from gaseous state. The cold box 8 is a heat exchanger, the last stage of cold box is a heat exchange place for oil gas and secondary refrigerant, and the rest stages are heat exchange places for hot oil gas and cold oil gas. There are two sets of cold box groups, be passageway B cold box group and passageway A cold box group respectively, every cold box group is established ties by a plurality of cold boxes 8 and is formed, unprocessed oil gas passes cold box at all levels to last one-level cold box from the front to the back in proper order under the effect of oil gas draught fan 10, carry out the heat transfer with the secondary refrigerant, reach the required temperature of system after, get into cold box at all levels forward again in proper order, and carry out the heat transfer with the hot oil gas that the place ahead flowed in the cold box at all levels, flow from the oil gas export at last. Along with oil gas cooling, each grade cold box all can appear with liquid oil, collects to liquid reserve tank 11 through the pipeline, if certain liquid level has been saved to the oil in the liquid reserve tank 11, the system will start oil pump 12, carries oil to the use place, drops to the settlement liquid level until oil, the oil pump of stopping operation. And a coolant heater 6.
In one embodiment, the refrigeration system 1 comprises a first refrigeration unit, a second refrigeration unit and a third refrigeration unit, the first refrigeration unit comprises a first compressor, a first oil separator, a first condenser, a first liquid storage device, a first liquid sight glass, a first filter, a first expansion valve, a first evaporator and a first gas-liquid separator which are sequentially connected through a pipeline, and an outlet of the first gas-liquid separator is connected with an inlet of the first compressor through a pipeline; the second refrigerating unit comprises a second compressor, a second oil separator, a second condenser, a second liquid storage device, a second liquid viewing mirror, a second expansion valve, a second evaporator, a heat regenerator and a second gas-liquid separator which are sequentially connected through pipelines, and an outlet of the second gas-liquid separator is connected with an inlet of the second compressor through a pipeline; the third refrigerant group comprises a third compressor, a third oil separator, a secondary refrigerant heater, a second evaporator, a third liquid storage device, a third liquid sight glass, a third filter, a third expansion valve, a cold box and a third gas-liquid separator which are sequentially connected through pipelines, and an outlet of the third gas-liquid separator is connected with an inlet of the third compressor through a pipeline; wherein the second condenser and the first evaporator are connected by a pipe. The refrigeration system has a very obvious energy-saving effect, and greatly reduces the carbon emission.
The specific working process of the invention is as follows: and opening the first secondary refrigerant inlet valve 21, the secondary refrigerant outlet valve 120 and the channel B circulating valve 14, sequentially starting each stage of compressor of the cryogenic cascade refrigeration system 1, starting the secondary refrigerant pump 4 and starting the circulating fan 9. When the temperature of each stage of cold box reaches the design temperature, the circulating fan 9 is closed, the circulating valve 14 of the channel B is closed, the air inlet valve 13 of the channel B and the air outlet valve 18 of the channel B are opened, and the oil-gas induced draft fan 10 is started.
And after the system is operated for a period of time, opening the second coolant inlet valve 25 and the second coolant outlet valve 27, wherein the first coolant inlet valve 21, the second coolant inlet valve 25, the first coolant outlet valve 20 and the second coolant outlet valve 27 are all regulating valves. At this time, the second secondary refrigerant inlet valve 25 and the second secondary refrigerant outlet valve 27 are both small in opening degree, so that a cold field is created for the passage a, the circulation valve 15 of the passage a is opened, and the circulating fan 9 is started, so that the temperature of each stage of cold boxes in the passage a reaches the design temperature. When the cold box of the channel B is frosted and the heat exchange capacity is reduced, the air outlet valve 16 of the channel A and the air inlet valve 17 of the channel A are opened, the circulating valve 15 of the channel A, the circulating fan 9, the air inlet valve 13 of the channel B and the air outlet valve 18 of the channel B are closed, meanwhile, the opening degrees of the second secondary refrigerant inlet valve 25 and the second secondary refrigerant outlet valve 27 are adjusted to the required size, and the first secondary refrigerant inlet valve 21 and the secondary refrigerant outlet valve 120 are closed. And then, opening the first coolant defrosting inlet valve 30, the coolant defrosting outlet valve 123 and the channel B circulating valve 14, starting the heat pump 7 and the circulating fan 9, introducing the high-temperature coolant into the channel B cold box to defrost, and closing the first coolant defrosting inlet valve 30, the coolant defrosting outlet valve 123, the channel B circulating valve 14, the heat pump 7 and the circulating fan 9 after defrosting is finished. And when the channel A operates for a certain time, opening the first secondary refrigerant inlet valve 21, the secondary refrigerant outlet valve 120 and the channel B circulating valve 14, wherein the first secondary refrigerant inlet valve 21 and the secondary refrigerant outlet valve 120 are both small in opening degree, and starting the circulating fan 9 to enable the temperature of each stage of cold boxes in the channel B to reach the design temperature. After running for a certain time, the channel B works, the channel A defrosts, the first secondary refrigerant inlet valve 21, the secondary refrigerant outlet valve 120, the channel B air inlet valve 13 and the channel B air outlet valve 18 are completely opened, and the channel A air outlet valve 16, the channel A air inlet valve 17, the second secondary refrigerant inlet valve 25 and the second secondary refrigerant outlet valve 27 are closed. And then opening a second coolant defrosting inlet valve 29, a coolant defrosting outlet valve 226 and a channel A circulating valve 15, starting the heat pump 7 and the circulating fan 9, introducing the high-temperature coolant into the channel A cold box to defrost, and closing the second coolant defrosting inlet valve 29, the coolant defrosting outlet valve 227, the channel A circulating valve 15, the heat pump 7 and the circulating fan 9 after defrosting is finished. By analogy, the two groups of cold boxes work alternately and continuously, and the temperature of the cold boxes is not fluctuated, so that the oil gas can be recovered at high efficiency. The operation can be performed by the action of the emptying valve when the equipment needs to be overhauled or the refrigerating medium is filled into the heating channel.
In one embodiment, two coolant evacuation valves, namely a first coolant evacuation valve 19 and a second coolant evacuation valve 22, are disposed between the last cold box 8 of channel B and the coolant storage tank 3, and two coolant evacuation valves, namely a third coolant evacuation valve 24 and a fourth coolant evacuation valve 28, are disposed between the last cold box 8 of channel B and the coolant storage tank 3. The first coolant evacuation valve 19, the second coolant evacuation valve 22, the third coolant evacuation valve 24, and the fourth coolant evacuation valve 28 are all used to evacuate air from the duct.
In one embodiment, a coolant expansion tank 5 is provided at the coolant inlet of the coolant heater 6.
The method has the effects of emission reduction and energy conservation, for example, by taking an oil gas recovery device with the handling capacity of 400 m/h, the unit can reduce 196kg of hydrocarbon every hour, the power of the assembled machine is only 66% of that of a conventional system, the kW is reduced by 40kW, if the assembled machine operates for 2000h every year, the emission of 392000kg of hydrocarbon can be reduced, the electricity consumption is saved by 8 ten thousand degrees, and the emission of carbon is reduced greatly by 592331.2kg of standard coal.
Claims (6)
1. The utility model provides a but oil gas recovery unit of quick refrigeration, defrosting which characterized in that: comprises two groups of cooling boxes, which are respectively a channel A cooling box group and a channel B cooling box group, wherein each group is provided with a plurality of cooling boxes (8) which are connected in series, an oil-gas air inlet is provided with an oil-gas draught fan (10), the oil-gas draught fan (10) is divided into two paths, one path of the oil-gas draught fan passes through a channel B air inlet valve (13) and a first inlet connection of a first cooling box (8) of the channel B cooling box group, one path of the oil-gas draught fan passes through a channel A air inlet valve (17) and a first inlet connection of a first cooling box (8) of the channel A cooling box group, an air outlet of the first cooling box (8) of the channel B cooling box group is provided with a channel B air outlet valve (18), an air outlet of the first cooling box (8) of the channel A cooling box group is provided with a channel A air outlet valve (16) and is also provided with a circulating fan (9), and a channel B circulating valve (14) is arranged between the circulating fan (9) and a second inlet of the first cooling box (8) of the channel B cooling box group, a channel A circulating valve (15) is arranged between the circulating fan (9) and a second inlet of a first cold box (8) of the channel A cold box group, the refrigeration system (1) is respectively connected with the evaporator (2) and the secondary refrigerant heater (6), a secondary refrigerant outlet of the evaporator (2) is connected with a secondary refrigerant inlet of the secondary refrigerant storage tank (3), a secondary refrigerant pump (4) is arranged at a secondary refrigerant outlet of the secondary refrigerant storage tank (3), the secondary refrigerant is divided into two paths after passing through the secondary refrigerant pump (4), one path enters the last cold box (8) of the channel B cold box group through a first secondary refrigerant inlet valve (21), and then returns to the evaporator (2) through a first secondary refrigerant outlet valve (20); one path of the refrigerant enters the last cold box (8) of the channel A cold box group through a second secondary refrigerant inlet valve (25), then returns to the evaporator (2) through a second secondary refrigerant outlet valve (27), the refrigerant in the refrigerant passes through a heat pump (7) after heat exchange of a secondary refrigerant heater (6), then is divided into two paths, then enters the last cold box (8) of the channel B cold box group through a first secondary refrigerant defrosting inlet valve (30), and returns to the secondary refrigerant heater (6) through a first secondary refrigerant defrosting outlet valve (23); the other path of the cold water enters the last cold box (8) of the cold box group of the channel A through a second secondary refrigerant defrosting inlet valve (29) and returns to the secondary refrigerant heater (6) through a second secondary refrigerant defrosting outlet valve (26).
2. The oil-gas recovery device capable of rapidly refrigerating and defrosting as claimed in claim 1, wherein: the first secondary refrigerant inlet valve (21), the second secondary refrigerant inlet valve (25), the first secondary refrigerant outlet valve (20) and the second secondary refrigerant outlet valve (27) are all regulating valves.
3. The oil and gas recovery device capable of rapidly refrigerating and defrosting as claimed in claim 1 or 2, wherein: two secondary refrigerant emptying valves are arranged between the last cold box (8) of the channel B and the secondary refrigerant storage tank (3), and are respectively a first secondary refrigerant emptying valve (19) and a second secondary refrigerant emptying valve (22), and two secondary refrigerant emptying valves are arranged between the last cold box (8) of the channel B and the secondary refrigerant storage tank (3), and are respectively a third secondary refrigerant emptying valve (24) and a fourth secondary refrigerant emptying valve (28).
4. The oil and gas recovery device capable of rapidly refrigerating and defrosting as claimed in claim 1 or 2, wherein: an oil outlet is arranged below each cold box (8), the oil outlet is connected with the liquid storage box (11), and an oil pump (12) is arranged at the outlet of the liquid storage box (11).
5. The oil and gas recovery device capable of rapidly refrigerating and defrosting as claimed in claim 1 or 2, wherein: and a secondary refrigerant expansion tank (5) is arranged at a secondary refrigerant inlet of the secondary refrigerant heater (6).
6. The oil and gas recovery device capable of rapidly refrigerating and defrosting as claimed in claim 1 or 2, wherein: the refrigeration system (1) comprises a first refrigeration unit, a second refrigeration unit and a third refrigeration unit, wherein the first refrigeration unit comprises a first compressor, a first oil separator, a first condenser, a first liquid storage device, a first liquid sight glass, a first filter, a first expansion valve, a first evaporator and a first gas-liquid separator which are sequentially connected through a pipeline, and an outlet of the first gas-liquid separator is connected with an inlet of the first compressor through a pipeline; the second refrigerating unit comprises a second compressor, a second oil separator, a second condenser, a second liquid storage device, a second liquid viewing mirror, a second expansion valve, a second evaporator, a heat regenerator and a second gas-liquid separator which are sequentially connected through pipelines, and an outlet of the second gas-liquid separator is connected with an inlet of the second compressor through a pipeline; the third refrigerant group comprises a third compressor, a third oil separator, a secondary refrigerant heater, a second evaporator, a third liquid storage device, a third liquid sight glass, a third filter, a third expansion valve, a cold box and a third gas-liquid separator which are sequentially connected through pipelines, and an outlet of the third gas-liquid separator is connected with an inlet of the third compressor through a pipeline; wherein the second condenser and the first evaporator are connected by a pipe.
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Cited By (1)
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| CN112856872A (en) * | 2021-01-20 | 2021-05-28 | 广东申菱环境系统股份有限公司 | Control method of cold-carrying type oil gas recovery device |
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| CN114608266B (en) | 2024-04-12 |
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