CN112870752A - Cold-carrying type oil gas recovery device - Google Patents
Cold-carrying type oil gas recovery device Download PDFInfo
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- CN112870752A CN112870752A CN202110076089.XA CN202110076089A CN112870752A CN 112870752 A CN112870752 A CN 112870752A CN 202110076089 A CN202110076089 A CN 202110076089A CN 112870752 A CN112870752 A CN 112870752A
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- 238000011084 recovery Methods 0.000 title claims abstract description 61
- 230000007246 mechanism Effects 0.000 claims abstract description 136
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 239000003507 refrigerant Substances 0.000 claims abstract description 76
- 238000005057 refrigeration Methods 0.000 claims abstract description 58
- 238000001816 cooling Methods 0.000 claims abstract description 39
- 238000010257 thawing Methods 0.000 claims description 153
- 239000003795 chemical substances by application Substances 0.000 claims description 55
- 239000002826 coolant Substances 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 6
- 239000004215 Carbon black (E152) Substances 0.000 description 5
- 229930195733 hydrocarbon Natural products 0.000 description 5
- 150000002430 hydrocarbons Chemical class 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/0096—Cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0051—Regulation processes; Control systems, e.g. valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0078—Condensation of vapours; Recovering volatile solvents by condensation characterised by auxiliary systems or arrangements
- B01D5/0084—Feeding or collecting the cooling medium
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G5/00—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas
- C10G5/06—Recovery of liquid hydrocarbon mixtures from gases, e.g. natural gas by cooling or compressing
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a cold-carrying type oil gas recovery device, which comprises a first oil gas condenser, a second oil gas condenser, a first refrigerating mechanism for realizing cooling circulation of secondary refrigerant in the first oil gas condenser, a first liquid storage tank, a second refrigerating mechanism for realizing cooling circulation of the secondary refrigerant in the second oil gas condenser, a second liquid storage tank, a tail gas heater and an oil storage tank for collecting condensate output by the first oil gas condenser, the second oil gas condenser and the tail gas heater, wherein the first oil gas condenser is connected with the first oil gas condenser; the secondary refrigerant output port of the first refrigeration mechanism is connected with the first oil-gas condenser through a first liquid storage tank, and the secondary refrigerant output port of the second refrigeration mechanism is connected with the second oil-gas condenser through a second liquid storage tank; the oil gas is processed by a first oil gas condenser, a second oil gas condenser and a tail gas heater and then output; the application discloses vapor recovery system device, through the secondary refrigerant cold-storage in first liquid storage pot and the second liquid storage pot, can effectively deal with the big problem of vapor load change.
Description
Technical Field
The invention relates to the technical field of oil gas recovery, in particular to a cold-carrying oil gas recovery device.
Background
The problems of complex oil gas types, large oil gas flow change and large oil gas temperature change exist, so that the difficulty of large oil gas load change exists in the process of recovering oil gas by adopting a condensation method; in addition, because the oil gas component contains heavy components and light components and contains certain water vapor, the problem that oil gas frosts on the surface of the heat exchanger easily occurs in the process of recovering oil gas by adopting a condensation method.
The existing oil gas recovery device based on the condensation method generally adopts a direct condensation method, a refrigeration system has two functions of condensing oil gas and defrosting, the system is complex, the defrosting effect is poor, the stability during system operation is poor, and in addition, the existing cold-carrying oil gas recovery device does not refer to how to treat the frosting problem of a heat exchanger.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a cold-carrying type oil gas recovery device, which can effectively solve the problem of large oil gas load change by cold storage of a secondary refrigerant through a first liquid storage tank and a second liquid storage tank and improve the stability of the cold-carrying type oil gas recovery device during operation.
In order to achieve the purpose, the invention adopts the following technical scheme:
a cold-carrying type oil gas recovery device comprises a control device, a first oil gas condenser, a second oil gas condenser, a first refrigeration mechanism, a first liquid storage tank, a second refrigeration mechanism, a second liquid storage tank, a tail gas heater and an oil storage tank; the first refrigerating mechanism is used for cooling the secondary refrigerant returned by the first oil-gas condenser, and a secondary refrigerant output port of the first refrigerating mechanism is connected with the first oil-gas condenser through the first liquid storage tank; the second refrigerating mechanism is used for cooling the secondary refrigerant returned by the second oil-gas condenser, and a secondary refrigerant output port of the second refrigerating mechanism is connected with the second oil-gas condenser through the second liquid storage tank; the first oil gas condenser is used for carrying out primary cooling treatment on oil gas input from the outside, the second oil gas condenser is used for further cooling treatment on the oil gas output by the first oil gas condenser, and the tail gas heater is used for carrying out heating treatment on the oil gas output by the second oil gas condenser and outputting the treated oil gas to the outside of the cold-carrying oil gas recovery device; and the first oil-gas condenser, the second oil-gas condenser and the tail gas heater are respectively connected with an input port of the oil storage tank.
The cold-carrying type oil gas recovery device further comprises a first cold-carrying agent pump and a second cold-carrying agent pump which are electrically connected with the control device respectively, the first liquid storage tank is connected with the first oil gas condenser through the first cold-carrying agent pump, and the second liquid storage tank is connected with the second oil gas condenser through the second cold-carrying agent pump.
The cold-carrying type oil gas recovery device further comprises a first switch valve, a second switch valve, a third switch valve, a fourth switch valve and a defrosting mechanism, wherein a third interface of the second oil gas condenser is connected with a secondary refrigerant input port of the second refrigerating mechanism through the first switch valve, and a third interface of the second oil gas condenser is connected with a defrosting agent input port of the defrosting mechanism through the third switch valve; a fourth interface of the second oil-gas condenser is connected with an output port of the second liquid storage tank through the second switch valve, and the fourth interface of the second oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the fourth switch valve; the first switch valve, the second switch valve, the third switch valve and the fourth switch valve are respectively electrically connected with the control device.
In the cold-carrying oil gas recovery device, a third interface of the tail gas heater is connected with a defrosting agent input port of the defrosting mechanism, and a fourth interface of the tail gas heater is connected with a defrosting agent output port of the defrosting mechanism.
In the cold-carrying oil gas recovery device, the defrosting mechanism comprises a defrosting heat exchanger, a defrosting liquid tank and a defrosting pump, a third interface of the second oil gas condenser is connected with a defrosting agent input port of the defrosting heat exchanger through the third switch valve, a defrosting agent output port of the defrosting heat exchanger is connected with an input port of the defrosting liquid tank, and an output port of the defrosting liquid tank is connected with a fourth interface of the second oil gas condenser through the defrosting pump; the defrosting heat exchanger is also connected with an external heat source supply mechanism.
The cold-carrying type oil gas recovery device also comprises a third oil gas condenser, a third refrigerating mechanism and a third liquid storage tank, wherein the third refrigerating mechanism is used for cooling the secondary refrigerant returned by the third oil gas condenser; a secondary refrigerant output port of the third refrigerating mechanism is connected with the third oil-gas condenser through the third liquid storage tank; the third oil gas condenser is used for further cooling the oil gas output by the second oil gas condenser and outputting the cooled oil gas to the tail gas heater; and the third oil-gas condenser is also connected with an input port of the oil storage tank.
The cold-carrying type oil gas recovery device further comprises a fifth switch valve, a sixth switch valve, a seventh switch valve and an eighth switch valve, wherein a third interface of the third oil gas condenser is connected with a cold-carrying agent input port of the third refrigeration mechanism through the fifth switch valve, and a third interface of the third oil gas condenser is connected with a defrosting agent input port of the defrosting mechanism through the seventh switch valve; a fourth interface of the third oil-gas condenser is connected with an output port of the third liquid storage tank through the sixth switching valve, and the fourth interface of the third oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the eighth switching valve; and the fifth switch valve, the sixth switch valve, the seventh switch valve and the eighth switch valve are respectively electrically connected with the control device.
The cold-carrying type oil gas recovery device further comprises a fourth oil gas condenser, a fifth oil gas condenser, a ninth switch valve, a tenth switch valve, an eleventh switch valve, a twelfth switch valve, a thirteenth switch valve, a fourteenth switch valve, a fifteenth switch valve, a sixteenth switch valve, a seventeenth switch valve and an eighteenth switch valve which are electrically connected with the control device respectively; the fourth oil gas condenser is used for further cooling the oil gas output by the first oil gas condenser, and the fifth oil gas condenser is used for further cooling the oil gas output by the fourth oil gas condenser; the third oil-gas condenser is connected with the tail gas heater through the seventeenth switch valve, and the fifth oil-gas condenser is connected with the tail gas heater through the eighteenth switch valve; a third interface of the fourth oil-gas condenser is connected with a secondary refrigerant input port of the second refrigerating mechanism through the ninth switch valve, and a third interface of the fourth oil-gas condenser is connected with a defrosting agent input port of the defrosting mechanism through the eleventh switch valve; a fourth interface of the fourth oil-gas condenser is connected with an output port of the second liquid storage tank through the tenth switch valve, and the fourth interface of the fourth oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the twelfth switch valve; a third interface of the fifth oil-gas condenser is connected with a secondary refrigerant input port of the third refrigerating mechanism through the thirteenth switching valve, and a third interface of the fifth oil-gas condenser is connected with a defrosting agent input port of the defrosting mechanism through the fifteenth switching valve; a fourth interface of the fifth oil-gas condenser is connected with an output port of the third liquid storage tank through the fourteenth switching valve, and a fourth interface of the fifth oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the sixteenth switching valve; the second refrigerating mechanism is used for cooling the secondary refrigerant returned by the fourth oil-gas condenser, the third refrigerating mechanism is used for cooling the secondary refrigerant returned by the fifth oil-gas condenser, and the defrosting mechanism is used for heating the defrosting agent returned by the fourth oil-gas condenser and the fifth oil-gas condenser.
Has the advantages that:
the invention provides a cold-carrying type oil gas recovery device, wherein a first liquid storage tank stores secondary refrigerant cooled by a first refrigeration mechanism, a second liquid storage tank stores secondary refrigerant cooled by a second refrigeration mechanism, and the secondary refrigerant in the first liquid storage tank and the secondary refrigerant in the second liquid storage tank are used for cold accumulation, so that the oil gas treatment process of the cold-carrying type oil gas recovery device is buffered, the problem of large oil gas load change can be effectively solved, and the stability of the cold-carrying type oil gas recovery device during working is improved.
Drawings
FIG. 1 is a schematic structural diagram of a cold-carrying oil gas recovery device according to the present invention;
FIG. 2 is a schematic view of the connection structure of a first hydrocarbon condenser, a second hydrocarbon condenser, a third hydrocarbon condenser, a tail gas heater and an oil storage tank provided by the invention;
FIG. 3 is a schematic structural diagram of a first refrigeration mechanism provided by the present invention;
fig. 4 is a schematic structural diagram of a second refrigeration mechanism, a third refrigeration mechanism and a defrosting mechanism provided by the invention;
fig. 5 is a connection structure diagram of a first oil gas condenser, a second oil gas condenser, a third oil gas condenser, a fourth oil gas condenser, a fifth oil gas condenser, a tail gas heater and an oil storage tank provided by the invention.
Description of the main element symbols: 11-a first oil-gas condenser, 12-a second oil-gas condenser, 13-a third oil-gas condenser, 14-a tail gas heater, 15-an oil storage tank, 21-a first refrigeration mechanism, 211-a first evaporator, 212-a first compressor, 213-a first condenser, 214-a first expansion valve, 22-a first liquid storage tank, 23-a first coolant pump, 31-a second refrigeration mechanism, 311-a second evaporator, 312-a second compressor, 313-a second condenser, 314-a second expansion valve, 32-a second liquid storage tank, 33-a second coolant pump, 34-a first switch valve, 35-a second switch valve, 36-a third switch valve, 37-a fourth switch valve, 41-a third refrigeration mechanism, 411-a third evaporator, 412-a third compressor, 413-a third condenser, 414-a third expansion valve, 42-a third liquid storage tank, 43-a third refrigeration pump, 44-a fifth switch valve, 45-a sixth switch valve, 46-a seventh switch valve, 47-an eighth switch valve, 5-a defrosting mechanism, 51-a defrosting heat exchanger, 52-a defrosting liquid tank and 53-a defrosting agent pump, 61-fourth oil-gas condenser, 62-ninth switch valve, 63-tenth switch valve, 64-eleventh switch valve, 65-twelfth switch valve, 71-fifth oil-gas condenser, 72-thirteenth switch valve, 73-fourteenth switch valve, 74-fifteenth switch valve, 75-sixteenth switch valve, 81-seventeenth switch valve and 82-eighteenth switch valve.
Detailed Description
The invention provides a cold-carrying type oil gas recovery device, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail by referring to the attached drawings and embodiments.
In the description of the present invention, it is to be understood that the terms "mounted," "connected," and the like are to be interpreted broadly, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
Referring to fig. 1 to 4, the present invention provides a cold-carrying type oil gas recovery device, which includes a control device, a first oil gas condenser 11, a second oil gas condenser 12, a first refrigeration mechanism 21, a first liquid storage tank 22, a second refrigeration mechanism 31, a second liquid storage tank 32, a tail gas heater 14 and an oil storage tank 15; the first refrigeration mechanism 21 is used for cooling the secondary refrigerant returned by the first oil-gas condenser 11, and a secondary refrigerant outlet of the first refrigeration mechanism 21 is connected with the first oil-gas condenser 11 through the first liquid storage tank 22; the second refrigeration mechanism 31 is used for cooling the secondary refrigerant returned by the second oil-gas condenser 12, and a secondary refrigerant output port of the second refrigeration mechanism 31 is connected with the second oil-gas condenser 12 through the second liquid storage tank 32; the first oil gas condenser 11 is used for carrying out primary cooling treatment on oil gas input from the outside, the second oil gas condenser 12 is used for further cooling treatment on the oil gas output from the first oil gas condenser 11, and the tail gas heater 14 is used for carrying out heating treatment on the oil gas output from the second oil gas condenser 12 and outputting the treated oil gas to the outside of the cold-carrying oil gas recovery device; the first oil-gas condenser 11, the second oil-gas condenser 12 and the tail gas heater 14 are respectively connected with an input port of an oil storage tank 15, and the oil storage tank 15 is used for collecting condensate of the first oil-gas condenser 11, the second oil-gas condenser 12 and the tail gas heater 14; in one embodiment, the control device is a control circuit board including any one of the control chips of the STM32 family.
Referring to fig. 1 to 4, when the cold-carrying type oil gas recovery device works, the first refrigeration mechanism 21 cools the secondary refrigerant returned by the first oil gas condenser 11, the cooled secondary refrigerant passes through the first liquid storage tank 22 and then returns to the first oil gas condenser 11, and the secondary refrigerant in the first oil gas condenser 11 exchanges heat with oil gas input from the outside and then returns to the first refrigeration mechanism 21 to cool, so as to form a cooling cycle of the secondary refrigerant; the second refrigerating mechanism 31 cools the secondary refrigerant returned by the second oil-gas condenser 12, the cooled secondary refrigerant passes through the second liquid storage tank 32 and then returns to the second oil-gas condenser 12, the secondary refrigerant in the second oil-gas condenser 12 exchanges heat with oil gas output from the first oil-gas condenser 11 and then returns to the second refrigerating mechanism 31 to be cooled, and cooling circulation of the secondary refrigerant is formed; the second oil gas condenser 12 outputs the oil gas subjected to the secondary cooling to the tail gas heater 14, and the tail gas heater 14 performs heating treatment on the oil gas and outputs the oil gas to an external oil gas treatment unit; the fifth interface of the first oil-gas condenser 11, the fifth interface of the second oil-gas condenser 12 and the fifth interface of the tail gas heater 14 are connected with the input port of the oil storage tank 15, the liquid condensed out by the first oil-gas condenser 11 and the second oil-gas condenser 12 enters the oil storage tank 15 under the action of self gravity, the output port of the oil storage tank 15 is connected with an external designated position, and the external designated position can be designated by an owner using the cold-carrying oil-gas recovery device.
The application discloses a cold-carrying type oil gas recovery device, wherein a first liquid storage tank 22 stores a secondary refrigerant cooled by a first refrigeration mechanism 21, a second liquid storage tank 32 stores the secondary refrigerant cooled by a second refrigeration mechanism 31, and the secondary refrigerants in the first liquid storage tank 22 and the second liquid storage tank 32 are used for cold accumulation, so that the oil gas treatment process of the cold-carrying type oil gas recovery device is buffered, the influence of external temperature change on the secondary refrigerant can be reduced, the problem of large oil gas load change can be effectively solved, and the stability of the cold-carrying type oil gas recovery device during working is improved; in addition, the first oil-gas condenser 11 and the second oil-gas condenser 12 are adopted to cool the oil gas step by step, so that the work load of each oil-gas condenser and each refrigerating mechanism can be reduced, and the work effect of the cold-carrying oil-gas recovery device is improved.
Further, referring to fig. 2 to 4, the cold-carrying type oil gas recovery device further includes a first coolant pump 23 and a second coolant pump 33 electrically connected to the control device, respectively, the first reservoir tank 22 is connected to the first oil gas condenser 11 through the first coolant pump 23, and the second reservoir tank 32 is connected to the second oil gas condenser 12 through the second coolant pump 33; when the cold-carrying type oil gas recovery device works, specifically, when the cold-carrying type oil gas recovery device executes a refrigeration mode, the first coolant pump 23 pumps the coolant in the first liquid storage tank 22 into the first oil gas condenser 11, and the second coolant pump 33 pumps the coolant in the second liquid storage tank 32 into the second oil gas condenser 12.
Further, referring to fig. 2 and fig. 3, in an embodiment, the first refrigeration mechanism 21 includes a first evaporator 211, a first expansion valve 214, a first condenser 213, and a first compressor 212, a refrigerant output port of the first evaporator 211 is connected to an input port of the first compressor 212, and a refrigerant output port of the first evaporator 211 is connected to an input port of the first liquid storage tank 22; a refrigerant input port of the first evaporator 211 is connected with an output port of the first expansion valve 214, and a secondary refrigerant input port of the first evaporator 211 is connected with the first oil-gas condenser 11; an output port of the first compressor 212 is connected with an input port of a first condenser 213, and an output port of the first condenser 213 is connected with an input port of a first expansion valve 214; the first evaporator 211 absorbs heat to cool the coolant output by the first oil-gas condenser 11, and outputs the cooled coolant to the first liquid storage tank 22; the refrigerant absorbing heat in the first evaporator 211 enters the first condenser 213 for temperature reduction under the action of the first compressor 212, and is then input into the first evaporator 211 through the first expansion valve 214, thereby ensuring stable operation of the first refrigeration mechanism 21.
Further, referring to fig. 2 and fig. 4, in an embodiment, the second refrigeration mechanism 31 includes a second evaporator 311, a second expansion valve 314, a second condenser 313 and a second compressor 312, a refrigerant output port of the second evaporator 311 is connected to an input port of the second compressor 312, and a coolant output port of the second evaporator 311 is connected to an input port of the second liquid storage tank 32; a refrigerant input port of the second evaporator 311 is connected with an output port of the second expansion valve 314, and a secondary refrigerant input port of the second evaporator 311 is connected with the second oil-gas condenser 12; an output port of the second compressor 312 is connected with an input port of a second condenser 313, and an output port of the second condenser 313 is connected with an input port of a second expansion valve 314; the second evaporator 311 absorbs heat to cool the secondary refrigerant output by the second oil-gas condenser 12, and outputs the cooled secondary refrigerant to the second liquid storage tank 32; the refrigerant absorbing heat in the second evaporator 311 enters the second condenser 313 to be cooled under the action of the second compressor 312, and then is input into the second evaporator 311 through the second expansion valve 314, so that the second refrigeration mechanism 31 is ensured to stably operate.
Because the second oil gas condenser 12 further cools the oil gas, the temperature of the oil gas output by the second oil gas condenser 12 is low, which means that the second oil gas condenser 12 is prone to frosting in the oil gas treatment process, and therefore it is necessary to perform defrosting treatment on the second oil gas condenser 12 to improve the stability and reliability of the cold-carrying oil gas recovery device during operation.
Further, referring to fig. 2 and 4, the cold-carrying oil gas recovery device further includes a first switch valve 34, a second switch valve 35, a third switch valve 36, a fourth switch valve 37, and a defrosting mechanism 5, wherein a third port of the second oil gas condenser 12 is connected to the coolant input port of the second refrigeration mechanism 31 through the first switch valve 34, and a third port of the second oil gas condenser 12 is connected to the defrosting agent input port of the defrosting mechanism 5 through the third switch valve 36; the fourth interface of the second oil-gas condenser 12 is connected with the output port of the second liquid storage tank 32 through the second switch valve 35, and the fourth interface of the second oil-gas condenser 12 is connected with the defrosting agent output port of the defrosting mechanism 5 through the fourth switch valve 37; the first switch valve 34, the second switch valve 35, the third switch valve 36 and the fourth switch valve 37 are respectively electrically connected with the control device; in one embodiment, the first, second, third and fourth switching valves 34, 35, 36 and 37 are solenoid valves.
When the cold-carrying type oil gas recovery device executes a refrigeration mode, the control device controls the first switch valve 34 and the second switch valve 35 to be opened, controls the third switch valve 36 and the fourth switch valve 37 to be closed, and the second refrigeration mechanism 31 outputs the cold-carrying agent to the second oil gas condenser 12 so as to further cool the oil gas output by the first oil gas condenser 11; when the cold-carrying type oil gas recovery device executes a defrosting mode, the control device controls the first switch valve 34 and the second switch valve 35 to be closed, controls the third switch valve 36 and the fourth switch valve 37 to be opened, and the defrosting mechanism 5 outputs defrosting agent to the second oil gas condenser 12 so as to carry out defrosting treatment on the second oil gas condenser 12; the defrosting agent output by the defrosting mechanism 5 and the secondary refrigerant output by the refrigerating mechanism are the same medium, and the temperature of the defrosting agent is higher than that of the secondary refrigerant.
Further, referring to fig. 2 and 4, a third interface of the exhaust gas heater 14 is connected to a defrosting agent input port of the defrosting mechanism 5, and a fourth interface of the exhaust gas heater 14 is connected to a defrosting agent output port of the defrosting mechanism 5; the defrosting mechanism 5 outputs high-temperature defrosting agent to the tail gas heater 14, the defrosting agent heats the oil gas output by the second oil gas condenser 12 in the tail gas heater 14, and the cooled defrosting agent returns to the defrosting mechanism 5 to heat to form a defrosting agent heating cycle; in other embodiments, the exhaust gas heater 14 may be an electric heater, and when the exhaust gas heater 14 is an electric heater, the exhaust gas heater 14 is electrically connected to the control device, and the exhaust gas heater 14 can generate heat by itself without being connected to the defrosting mechanism 5.
Further, referring to fig. 2 and 4, the defrosting mechanism 5 includes a defrosting heat exchanger 51, a defrosting liquid tank 52 and a defrosting pump 53, the third interface of the second oil-gas condenser 12 is connected to the input port of the defrosting heat exchanger 51 through the third on-off valve 36, the output port of the defrosting heat exchanger 51 is connected to the input port of the defrosting liquid tank 52, and the output port of the defrosting liquid tank 52 is connected to the fourth interface of the second oil-gas condenser 12 through the defrosting pump 53; the defrosting heat exchanger 51 is further connected to an external heat source supply mechanism, which may be a device capable of providing a heat source in the prior art, and the heat source may be high-temperature air or a high-temperature refrigerant.
Further, referring to fig. 2 and 4, the cold-carrying oil gas recovery device further includes a third oil gas condenser 13, a third refrigeration mechanism 41 and a third liquid storage tank 42, where the third refrigeration mechanism 41 is configured to cool the coolant returned by the third oil gas condenser 13; a secondary refrigerant output port of the third refrigerating mechanism 41 is connected with the third oil-gas condenser 13 through the third liquid storage tank 42; the third oil gas condenser 13 is used for further cooling the oil gas output by the second oil gas condenser 12 and outputting the cooled oil gas to the tail gas heater 14; the third oil-gas condenser 13 is also connected with an input port of an oil storage tank 15, and the oil storage tank 15 is used for collecting condensate discharged by the third oil-gas condenser 13; through setting up third oil gas condenser 13, can further cool down the processing to the oil gas of second oil gas condenser 12 output, further reduce every oil gas condenser and every refrigeration mechanism's work load, improve the work effect who carries cold type vapor recovery system device.
Because the third oil gas condenser 13 further cools the oil gas output by the second oil gas condenser 12, the temperature of the oil gas output by the third oil gas condenser 13 is low, which means that the third oil gas condenser 13 is prone to frosting in the oil gas treatment process, and therefore it is necessary to perform defrosting treatment on the third oil gas condenser 13 to improve the stability and reliability of the cold-carrying oil gas recovery device during operation.
Further, referring to fig. 2 and 4, the cold-carrying oil gas recovery device further includes a fifth switch valve 44, a sixth switch valve 45, a seventh switch valve 46 and an eighth switch valve 47, a third port of the third oil gas condenser 13 is connected to the coolant input port of the third refrigeration mechanism 41 through the fifth switch valve 44, and a third port of the third oil gas condenser 13 is connected to the defrosting agent input port of the defrosting mechanism 5 through the seventh switch valve 46; a fourth interface of the third oil-gas condenser 13 is connected with an output port of the third liquid storage tank 42 through the sixth switching valve 45, and a fourth interface of the third oil-gas condenser 13 is connected with a defrosting agent output port of the defrosting mechanism 5 through the eighth switching valve 47; the fifth switch valve 44, the sixth switch valve 45, the seventh switch valve 46 and the eighth switch valve 47 are respectively electrically connected with the control device; in one embodiment, the fifth, sixth, seventh and eighth switching valves 44, 45, 46 and 47 are solenoid valves.
When the cold-carrying type oil gas recovery device executes a refrigeration mode, the control device controls the fifth switch valve 44 and the sixth switch valve 45 to be opened, controls the seventh switch valve 46 and the eighth switch valve 47 to be closed, and the third refrigeration mechanism 41 outputs cold-carrying agent to the third oil gas condenser 13 so as to further cool the oil gas output by the second oil gas condenser 12; when the cold-carrying type oil gas recovery device executes a defrosting mode, the control device controls the fifth switch valve 44 and the sixth switch valve 45 to be closed, controls the seventh switch valve 46 and the eighth switch valve 47 to be opened, and the defrosting mechanism 5 outputs defrosting agent to the third oil gas condenser 13 so as to carry out defrosting treatment on the third oil gas condenser 13.
Further, referring to fig. 2 and fig. 4, in an embodiment, the third refrigeration mechanism 41 includes a third evaporator 411, a third expansion valve 414, a third condenser 413, and a third compressor 412, a refrigerant output port of the third evaporator 411 is connected to an input port of the third compressor 412, and a coolant output port of the third evaporator 411 is connected to an input port of the third liquid storage tank 42; a refrigerant input port of the third evaporator 411 is connected with an output port of a third expansion valve 414, and a secondary refrigerant output port of the third evaporator 411 is connected with a third oil-gas condenser 13; an output port of the third compressor 412 is connected to an input port of a third condenser 413, and an output port of the third condenser 413 is connected to an input port of a third expansion valve 414; the secondary refrigerant returned by the third oil-gas condenser 13 exchanges heat with the refrigerant in the third evaporator 411, the refrigerant after heat exchange enters the third condenser 413 to cool under the action of the third compressor 412, and then is input into the third evaporator 411 through the third expansion valve 414, so as to ensure the stable operation of the third refrigeration mechanism 41.
The second oil gas condenser 12 and the third oil gas condenser 13 can execute a refrigeration mode and a defrosting mode, when the cold-carrying oil gas recovery device is switched from the refrigeration state to the defrosting state, the low-temperature secondary refrigerant remained in the heat exchange tubes of the second oil gas condenser 12 and the heat exchange tubes of the third oil gas condenser 13 enters the defrosting mechanism 5, and when the cold-carrying oil gas recovery device is switched from the defrosting state to the refrigeration state, the normal-temperature secondary refrigerant remained in the heat exchange tubes of the second oil gas condenser 12 and the heat exchange tubes of the third oil gas condenser 13 enters the second refrigeration mechanism 31 and the third refrigeration mechanism 41, because the density of the normal-temperature secondary refrigerant is less than that of the low-temperature secondary refrigerant, and when the refrigeration mode and the defrosting mode are switched, the volumes of the liquid remained in the heat exchange tubes of the second oil gas condenser 12 and the heat exchange tubes of the third oil gas condenser 13 are the same, as a result, the low-temperature secondary refrigerant of the second refrigeration mechanism 31 and the third refrigeration mechanism 41 can, the mass of the coolant in the defrosting mechanism 5 is getting larger, and the liquid amount between the second and third liquid tanks 32 and 42 and the defrosting liquid tank 52 is unbalanced.
Further, referring to fig. 4, the defrosting liquid tank 52 is connected to the upper portion of the second liquid tank 32 and the upper portion of the third liquid tank 42 through pipes, and when the liquid level of the defrosting liquid in the defrosting liquid tank 52 is higher than the connection port between the pipes and the defrosting liquid tank 52, the defrosting liquid in the defrosting liquid tank 52 can migrate to the second liquid tank 32 and the third liquid tank 42, so as to achieve the purpose that the liquid level of the coolant between the second liquid tank 32 and the third liquid tank 42 and the defrosting liquid tank 52 is relatively stable, avoid the liquid level of the defrosting liquid in the defrosting liquid tank 52 from being too high, and improve the stability and reliability of the cold-carrying type oil and gas recovery device during operation.
Further, referring to fig. 2 to 5, the cold-carrying type oil gas recovery device further includes a fourth oil gas condenser 61, a fifth oil gas condenser 71, and a ninth switch valve 62, a tenth switch valve 63, an eleventh switch valve 64, a twelfth switch valve 65, a thirteenth switch valve 72, a fourteenth switch valve 73, a fifteenth switch valve 74, a sixteenth switch valve 75, a seventeenth switch valve 81, and an eighteenth switch valve 82 electrically connected to the control device, respectively; the fourth oil-gas condenser 61 is used for further cooling the oil gas output by the first oil-gas condenser 11, and the fifth oil-gas condenser 71 is used for further cooling the oil gas output by the fourth oil-gas condenser 61; the third oil gas condenser 13 is connected with the tail gas heater 14 through the seventeenth switch valve 81, and the fifth oil gas condenser 71 is connected with the tail gas heater 14 through the eighteenth switch valve 82; a third port of the fourth oil-gas condenser 61 is connected with the coolant input port of the second refrigeration mechanism 31 through the ninth switch valve 62, and a third port of the fourth oil-gas condenser 61 is connected with the defrosting agent input port of the defrosting mechanism 5 through the eleventh switch valve 64; a fourth port of the fourth oil-gas condenser 61 is connected with the output port of the second liquid storage tank 32 through the tenth switch valve 63, and a fourth port of the fourth oil-gas condenser 61 is connected with the defrosting agent output port of the defrosting mechanism 5 through the twelfth switch valve 65; a third port of the fifth hydrocarbon condenser 71 is connected with the coolant input port of the third refrigeration mechanism 41 through the thirteenth switching valve 72, and a third port of the fifth hydrocarbon condenser 71 is connected with the defrosting agent input port of the defrosting mechanism 5 through the fifteenth switching valve 74; a fourth interface of the fifth oil-gas condenser 71 is connected with an output port of the third liquid storage tank 42 through the fourteenth switching valve 73, and a fourth interface of the fifth oil-gas condenser 71 is connected with a defrosting agent output port of the defrosting mechanism 5 through the sixteenth switching valve 75; the second refrigeration mechanism 31 is used for cooling the secondary refrigerant returned by the fourth oil-gas condenser 61, the third refrigeration mechanism 41 is used for cooling the secondary refrigerant returned by the fifth oil-gas condenser 71, and the defrosting mechanism 5 is used for heating the defrosting agent returned by the fourth oil-gas condenser 61 and the fifth oil-gas condenser 71.
In one embodiment, the ninth on-off valve 62, the tenth on-off valve 63, the eleventh on-off valve 64, the twelfth on-off valve 65, the thirteenth on-off valve 72, the fourteenth on-off valve 73, the fifteenth on-off valve 74, the sixteenth on-off valve 75, the seventeenth on-off valve 81, and the eighteenth on-off valve 82 are solenoid valves.
Referring to fig. 2 to 5, in an embodiment, the cold-carrying type oil gas recovery device includes a channel a and a channel B, where the channel a and the channel B may alternately perform a cooling mode and a defrosting mode to prolong the working time of the cold-carrying type oil gas recovery device, and may defrost an oil gas condenser with a frosting problem in time to ensure stable working of the cold-carrying type oil gas recovery device; the channel A comprises a first oil-gas condenser 11, a second oil-gas condenser 12, a third oil-gas condenser 13 and a tail gas heater 14 which are used for sequentially processing oil gas, and the channel B comprises a first oil-gas condenser 11, a fourth oil-gas condenser 61, a fifth oil-gas condenser 71 and a tail gas heater 14 which are used for sequentially processing oil gas; when the channel A executes the cooling mode and the channel B executes the defrosting mode, the control device controls the first switch valve 34, the second switch valve 35, the fifth switch valve 44, the sixth switch valve 45, the eleventh switch valve 64, the twelfth switch valve 65, the fifteenth switch valve 74, the sixteenth switch valve 75 and the seventeenth switch valve 81 to be opened and controls the other switch valves to be closed; the second refrigeration mechanism 31 returns the cooled secondary refrigerant to the second oil-gas condenser 12 to cool the oil gas, the third refrigeration mechanism 41 returns the cooled secondary refrigerant to the third oil-gas condenser 13 to cool the oil gas, and the defrosting mechanism 5 provides defrosting agent to the fourth oil-gas condenser 61 and the fifth oil-gas condenser 71 to defrost the fourth oil-gas condenser 61 and the fifth oil-gas condenser 71; when the switching condition is reached, the switching condition may be switching time set in the control device, the channel a executes a defrosting mode, the channel B executes a cooling mode, the control device controls the third switch valve 36, the fourth switch valve 37, the seventh switch valve 46, the eighth switch valve 47, the ninth switch valve 62, the tenth switch valve 63, the thirteenth switch valve 72 and the fourteenth switch valve 73 to be opened, and controls the other switch valves to be closed, the second cooling mechanism 31 returns cooled coolant to the fourth oil-gas condenser 61 to cool oil gas, the third cooling mechanism 41 returns cooled coolant to the fifth oil-gas condenser 71 to cool oil gas, and the defrosting mechanism 5 provides defrosting agent to the second oil-gas condenser 12 and the third oil-gas condenser 13 to defrost the second oil-gas condenser 12 and the third oil-gas condenser 13.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (8)
1. A cold-carrying type oil gas recovery device comprises a control device, and is characterized by further comprising a first oil gas condenser, a second oil gas condenser, a first refrigerating mechanism, a first liquid storage tank, a second refrigerating mechanism, a second liquid storage tank, a tail gas heater and an oil storage tank; the first refrigerating mechanism is used for cooling the secondary refrigerant returned by the first oil-gas condenser, and a secondary refrigerant output port of the first refrigerating mechanism is connected with the first oil-gas condenser through the first liquid storage tank; the second refrigerating mechanism is used for cooling the secondary refrigerant returned by the second oil-gas condenser, and a secondary refrigerant output port of the second refrigerating mechanism is connected with the second oil-gas condenser through the second liquid storage tank; the first oil gas condenser is used for carrying out primary cooling treatment on oil gas input from the outside, the second oil gas condenser is used for further cooling treatment on the oil gas output by the first oil gas condenser, and the tail gas heater is used for carrying out heating treatment on the oil gas output by the second oil gas condenser and outputting the treated oil gas to the outside of the cold-carrying oil gas recovery device; and the first oil-gas condenser, the second oil-gas condenser and the tail gas heater are respectively connected with an input port of the oil storage tank.
2. The cold-carrying type oil gas recovery device of claim 1, further comprising a first coolant pump and a second coolant pump electrically connected to the control device, respectively, wherein the first reservoir is connected to the first oil gas condenser via the first coolant pump, and the second reservoir is connected to the second oil gas condenser via the second coolant pump.
3. The cold-carrying type oil gas recovery device as claimed in claim 1, further comprising a first on-off valve, a second on-off valve, a third on-off valve, a fourth on-off valve and a defrosting mechanism, wherein the third port of the second oil gas condenser is connected to the coolant input port of the second refrigerating mechanism through the first on-off valve, and the third port of the second oil gas condenser is connected to the defrosting agent input port of the defrosting mechanism through the third on-off valve; a fourth interface of the second oil-gas condenser is connected with an output port of the second liquid storage tank through the second switch valve, and the fourth interface of the second oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the fourth switch valve; the first switch valve, the second switch valve, the third switch valve and the fourth switch valve are respectively electrically connected with the control device.
4. The cold-carrying type oil gas recovery device as claimed in claim 3, wherein the third port of the exhaust gas heater is connected to a defrosting agent input port of the defrosting mechanism, and the fourth port of the exhaust gas heater is connected to a defrosting agent output port of the defrosting mechanism.
5. The cold-carrying oil gas recovery device as claimed in claim 3, wherein the defrosting mechanism comprises a defrosting heat exchanger, a defrosting liquid tank and a defrosting pump, the third interface of the second oil gas condenser is connected to the defrosting agent input port of the defrosting heat exchanger through the third on-off valve, the defrosting agent output port of the defrosting heat exchanger is connected to the input port of the defrosting liquid tank, and the output port of the defrosting liquid tank is connected to the fourth interface of the second oil gas condenser through the defrosting pump; the defrosting heat exchanger is also connected with an external heat source supply mechanism.
6. The cold-carrying type oil gas recovery device according to claim 3, further comprising a third oil gas condenser, a third refrigeration mechanism and a third liquid storage tank, wherein the third refrigeration mechanism is used for cooling the coolant returned by the third oil gas condenser; a secondary refrigerant output port of the third refrigerating mechanism is connected with the third oil-gas condenser through the third liquid storage tank; the third oil gas condenser is used for further cooling the oil gas output by the second oil gas condenser and outputting the cooled oil gas to the tail gas heater; and the third oil-gas condenser is also connected with an input port of the oil storage tank.
7. The cold-carrying oil and gas recovery device according to claim 6, further comprising a fifth switch valve, a sixth switch valve, a seventh switch valve and an eighth switch valve, wherein the third port of the third oil and gas condenser is connected to the coolant input port of the third refrigeration mechanism through the fifth switch valve, and the third port of the third oil and gas condenser is connected to the defrosting agent input port of the defrosting mechanism through the seventh switch valve; a fourth interface of the third oil-gas condenser is connected with an output port of the third liquid storage tank through the sixth switching valve, and the fourth interface of the third oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the eighth switching valve; and the fifth switch valve, the sixth switch valve, the seventh switch valve and the eighth switch valve are respectively electrically connected with the control device.
8. The cold-carrying type oil gas recovery device of claim 7, further comprising a fourth oil gas condenser, a fifth oil gas condenser, and a ninth switch valve, a tenth switch valve, an eleventh switch valve, a twelfth switch valve, a thirteenth switch valve, a fourteenth switch valve, a fifteenth switch valve, a sixteenth switch valve, a seventeenth switch valve and an eighteenth switch valve electrically connected to the control device, respectively; the fourth oil gas condenser is used for further cooling the oil gas output by the first oil gas condenser, and the fifth oil gas condenser is used for further cooling the oil gas output by the fourth oil gas condenser; the third oil-gas condenser is connected with the tail gas heater through the seventeenth switch valve, and the fifth oil-gas condenser is connected with the tail gas heater through the eighteenth switch valve; a third interface of the fourth oil-gas condenser is connected with a secondary refrigerant input port of the second refrigerating mechanism through the ninth switch valve, and a third interface of the fourth oil-gas condenser is connected with a defrosting agent input port of the defrosting mechanism through the eleventh switch valve; a fourth interface of the fourth oil-gas condenser is connected with an output port of the second liquid storage tank through the tenth switch valve, and the fourth interface of the fourth oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the twelfth switch valve; a third interface of the fifth oil-gas condenser is connected with a secondary refrigerant input port of the third refrigerating mechanism through the thirteenth switching valve, and a third interface of the fifth oil-gas condenser is connected with a defrosting agent input port of the defrosting mechanism through the fifteenth switching valve; a fourth interface of the fifth oil-gas condenser is connected with an output port of the third liquid storage tank through the fourteenth switching valve, and a fourth interface of the fifth oil-gas condenser is connected with a defrosting agent output port of the defrosting mechanism through the sixteenth switching valve; the second refrigerating mechanism is used for cooling the secondary refrigerant returned by the fourth oil-gas condenser, the third refrigerating mechanism is used for cooling the secondary refrigerant returned by the fifth oil-gas condenser, and the defrosting mechanism is used for heating the defrosting agent returned by the fourth oil-gas condenser and the fifth oil-gas condenser.
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| CN202110076089.XA CN112870752A (en) | 2021-01-20 | 2021-01-20 | Cold-carrying type oil gas recovery device |
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Application publication date: 20210601 |