CN114470848A - Condensed oil gas recovery system and defrosting method - Google Patents
Condensed oil gas recovery system and defrosting method Download PDFInfo
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- 238000011084 recovery Methods 0.000 title claims abstract description 64
- 238000010257 thawing Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000007246 mechanism Effects 0.000 claims abstract description 206
- 230000005494 condensation Effects 0.000 claims abstract description 18
- 238000009833 condensation Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 34
- 238000000926 separation method Methods 0.000 claims description 32
- 238000012545 processing Methods 0.000 claims description 25
- 238000012546 transfer Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- 229920006395 saturated elastomer Polymers 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
- B01D5/0033—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
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
- B01D5/0009—Horizontal tubes
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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
- B01D5/0054—General arrangements, e.g. flow sheets
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B11/00—Controlling arrangements with features specially adapted for condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B7/00—Combinations of two or more condensers, e.g. provision of reserve condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
Abstract
The invention discloses a condensed oil gas recovery system and a defrosting method, wherein the condensed oil gas recovery system comprises an oil gas inlet, an oil gas outlet, a control device, a first oil gas treatment mechanism and a second oil gas treatment mechanism, wherein the oil gas inlet is respectively connected with the input end of the first oil gas treatment mechanism and the input end of the second oil gas treatment mechanism through a first switch part; the output end of the first oil-gas treatment mechanism is respectively connected with the input end of the second oil-gas treatment mechanism and the oil-gas outlet through the second switching part; the output end of the second oil-gas treatment mechanism is respectively connected with the input end of the first oil-gas treatment mechanism and the oil-gas outlet through a third switching part; the application discloses condensation vapor recovery system, through the operating condition of three switch portion of controlling means adjustment, make the vapor to be treated the recovery turn into the frost to arbitrary vapor treatment mechanism earlier, reentrant another vapor treatment mechanism carries out vapor recovery system, reduces the system's work load when effectively changing the frost.
Description
Technical Field
The invention relates to the technical field of oil gas recovery systems, in particular to a condensed oil gas recovery system and a defrosting method.
Background
The condensed oil gas is recycled by using a low-temperature technology, the temperature of the oil gas under certain pressure is reduced through heat exchange of a heat exchanger, the partial pressure of the oil gas is greater than the saturated partial pressure under low temperature, and the oil gas is condensed into a liquid oil product; because oil gas composition is complicated various, when the heat transfer with the low temperature medium in the heat exchanger, high melting point medium can solidify into solid-state, gathers on the heat exchange tube surface, forms the frosting phenomenon, worsens the heat transfer effect of heat exchanger to increase oil gas circulation resistance, in order to resume the design heat transfer ability of heat exchanger, need change the frost to the heat exchanger and handle.
The existing condensed oil gas recovery system generally adopts two defrosting methods, one method is in-pipe hot gas heat transfer type defrosting, heat transfer defrosting is realized by exhausting air by a compressor or introducing other heat sources into a heat exchange pipe, and the method has the main defects that: the complexity of the oil gas recovery system is increased, so that the instability of the system in operation is increased, and the manufacturing cost of the system is greatly increased; the other defrosting mode is external direct contact defrosting, air, oil gas or other gas and other heat exchange media are introduced into an oil gas condenser, and the heat exchange media directly contact with a frost layer on the surface of a heat exchange tube and release heat to melt the frost layer so as to achieve the defrosting purpose, and the method has the main defects that: normal cooling, condensing and recycling treatment cannot be carried out on oil gas in the defrosting period, namely the oil gas treatment is discontinuous; and the introduced gas serving as a heat exchange medium is generally directly discharged, so that the problem of excessive discharge concentration exists.
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 condensed oil gas recovery system which can efficiently defrost, ensure the continuity of an oil gas treatment process and has the advantage of low energy consumption.
In order to achieve the purpose, the invention adopts the following technical scheme:
a condensed oil gas recovery system comprises an oil gas inlet, an oil gas outlet, a control device, a first oil gas treatment mechanism and a second oil gas treatment mechanism, wherein the oil gas inlet is respectively connected with the input end of the first oil gas treatment mechanism and the input end of the second oil gas treatment mechanism through a first switching part; the output end of the first oil-gas treatment mechanism is respectively connected with the input end of the second oil-gas treatment mechanism and the oil-gas outlet through a second switching part; the output end of the second oil-gas treatment mechanism is respectively connected with the input end of the first oil-gas treatment mechanism and the oil-gas outlet through a third switching part; the first oil gas treatment mechanism, the second oil gas treatment mechanism, the first switch part, the second switch part and the third switch part are respectively electrically connected with the control device.
In the condensed oil-gas recovery system, the first switch part comprises a first switch valve and a second switch valve which are respectively electrically connected with the control device, and the oil-gas inlet is connected with the input end of the first oil-gas treatment mechanism through the first switch valve and is connected with the input end of the second oil-gas treatment mechanism through the second switch valve.
In the condensed oil-gas recovery system, the second switch part comprises a third switch valve and a sixth switch valve which are respectively electrically connected with the control device, and the output end of the first oil-gas treatment mechanism is connected with the oil-gas outlet through the third switch valve and is connected with the input end of the second oil-gas treatment mechanism through the sixth switch valve.
In the condensed oil-gas recovery system, the third switch part comprises a fourth switch valve and a fifth switch valve which are respectively electrically connected with the control device, and the output end of the second oil-gas treatment mechanism is connected with the oil-gas outlet through the fourth switch valve and is connected with the input end of the first oil-gas treatment mechanism through the fifth switch valve.
In the condensed oil-gas recovery system, the first oil-gas treatment mechanism comprises a first oil-gas condenser, a second oil-gas condenser, a third oil-gas condenser, a first gas-liquid separation tank and a first tail gas heater which are sequentially connected; the input end of the first oil-gas condenser is connected with the oil-gas inlet through the first switching part and is connected with the output end of the second oil-gas processing mechanism through the third switching part; the output end of the first tail gas heater is connected with the input end of the second oil gas treatment mechanism and the oil gas outlet respectively through the second switch part.
The condensation oil gas recovery system in, first oil gas processing mechanism still include respectively with controlling means electric connection's first temperature sensor, second temperature sensor and third temperature sensor, first temperature sensor set up in first oil gas condenser with on the connecting pipe of second oil gas condenser, second temperature sensor set up in second oil gas condenser with on the connecting pipe of third oil gas condenser, third temperature sensor set up in third oil gas condenser with on the connecting pipe of first gas-liquid separation jar.
In the condensed oil-gas recovery system, the second oil-gas treatment mechanism comprises a fourth oil-gas condenser, a fifth oil-gas condenser, a sixth oil-gas condenser, a second gas-liquid separation tank and a second tail gas heater which are sequentially connected; the input end of the fourth oil-gas condenser is connected with the oil-gas inlet through the first switching part and is connected with the output end of the first oil-gas processing mechanism through the third switching part; and the output end of the second tail gas heater is connected with the input end of the first oil-gas treatment mechanism and the oil-gas outlet respectively through the third switch part.
The condensation oil gas recovery system in, second oil gas processing mechanism still include respectively with controlling means electric connection's fourth temperature sensor, fifth temperature sensor and sixth temperature sensor, fourth temperature sensor set up in fourth oil gas condenser with on the connecting pipeline of fifth oil gas condenser, fifth temperature sensor set up in fifth oil gas condenser with on the connecting pipeline of sixth oil gas condenser, sixth temperature sensor set up in sixth oil gas condenser with on the connecting pipeline of second gas-liquid separation jar.
The invention also correspondingly provides a defrosting method of the condensed oil-gas recovery system, which is used for realizing defrosting of the condensed oil-gas recovery system; the defrosting method comprises the following steps:
s101, when a control instruction of defrosting by the first oil-gas treatment mechanism is received, the control device controls the condensed oil-gas recovery system to execute the steps S201 to S204;
s102, when a control instruction of defrosting by the second oil-gas treatment mechanism is received, the control device controls the oil-gas condensation recovery system to execute the steps S301 to S304;
s201, the control device controls the first oil gas treatment mechanism to stop refrigerating and enter a defrosting state, and controls the second oil gas treatment mechanism to enter a refrigerating state so as to carry out condensation recovery treatment on oil gas;
s202, the control device controls the first switching part to conduct a connecting pipeline between the oil gas inlet and the first oil gas treatment mechanism, and controls the first switching part to close the connecting pipeline between the oil gas inlet and the second oil gas treatment mechanism;
s203, the control device controls the second switching part to conduct a connecting pipeline between the output end of the first oil-gas processing mechanism and the input end of the second oil-gas processing mechanism, and controls the second switching part to close the connecting pipeline between the output end of the first oil-gas processing mechanism and an oil-gas outlet;
s204, the control device controls the third switch part to conduct a connecting pipeline between the output end of the second oil-gas treatment mechanism and an oil-gas outlet, and controls the third switch part to close the connecting pipeline between the output end of the second oil-gas treatment mechanism and the input end of the first oil-gas treatment mechanism;
s301, the control device controls the second oil gas treatment mechanism to stop refrigerating and enter a defrosting state, and controls the first oil gas treatment mechanism to enter a refrigerating state so as to carry out condensation recovery treatment on oil gas;
s302, the control device controls the first switching part to conduct a connecting pipeline between the oil gas inlet and the second oil gas treatment mechanism, and controls the first switching part to close the connecting pipeline between the oil gas inlet and the first oil gas treatment mechanism;
s303, the control device controls the third switch part to conduct a connecting pipeline between the output end of the second oil-gas treatment mechanism and the input end of the first oil-gas treatment mechanism, and controls the third switch part to close the connecting pipeline between the output end of the second oil-gas treatment mechanism and an oil-gas outlet;
s304, the control device controls the second switching part to conduct a connecting pipeline between the output end of the first oil-gas treatment mechanism and the oil-gas outlet, and controls the second switching part to close the connecting pipeline between the output end of the first oil-gas treatment mechanism and the input end of the second oil-gas treatment mechanism.
In the defrosting method of the condensed oil-gas recovery system, the first switching part comprises a first switching valve and a second switching valve, and the oil-gas inlet is connected with the input end of the first oil-gas treatment mechanism through the first switching valve and is connected with the input end of the second oil-gas treatment mechanism through the second switching valve; the second switching part comprises a third switching valve and a sixth switching valve, and the output end of the first oil-gas treatment mechanism is connected with the oil-gas outlet through the third switching valve and is connected with the input end of the second oil-gas treatment mechanism through the sixth switching valve; the third switch part comprises a fourth switch valve and a fifth switch valve, and the output end of the second oil-gas treatment mechanism is connected with the oil-gas outlet through the fourth switch valve and is connected with the input end of the first oil-gas treatment mechanism through the fifth switch valve; the steps S201 to S203 are specifically:
s201, the control device controls the first switch valve to be opened and controls the second switch valve to be closed;
s202, the control device controls the sixth switching valve to be opened and controls the third switching valve to be closed;
and S203, the control device controls the fourth switch valve to be opened and controls the fifth switch valve to be closed.
Has the advantages that:
the invention provides a condensed oil gas recovery system, which adjusts the working states of a first switch part, a second switch part and a third switch part through a control device, so that oil gas to be recovered is firstly defrosted to any oil gas treatment mechanism and then enters the other oil gas treatment mechanism for oil gas recovery, the two oil gas treatment mechanisms execute a defrosting mode in turn, the heat exchange effect of an oil gas condenser can be ensured, the continuity of the oil gas treatment process can be ensured, the gas discharged by the system is subjected to cryogenic treatment all the time, and the problem that the oil gas emission concentration exceeds the standard is avoided; the oil gas after defrosting is cooled, and the refrigeration load of an oil gas treatment mechanism for recovering oil gas can be reduced, so that the working energy consumption of a condensed oil gas recovery system is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a condensed oil vapor recovery system provided by the present invention;
FIG. 2 is a system block diagram of a first hydrocarbon treatment mechanism in accordance with the present invention during a defrost mode;
FIG. 3 is a system block diagram of a second hydrocarbon treating mechanism in accordance with the present invention during a defrost mode;
FIG. 4 is a logic flow diagram of a defrost method provided by the present invention;
FIG. 5 is a logic flow diagram of one embodiment of a defrost method provided by the present invention.
Description of the main element symbols: 1-oil gas inlet, 2-oil gas outlet, 31-first oil gas condenser, 32-second oil gas condenser, 33-third oil gas condenser, 34-first gas-liquid separation tank, 35-first tail gas heater, 36-first temperature sensor, 37-second temperature sensor, 38-third temperature sensor, 41-fourth oil gas condenser, 42-fifth oil gas condenser, 43-sixth oil gas condenser, 44-second gas-liquid separation tank, 45-second tail gas heater, 46-fourth temperature sensor, 47-fifth temperature sensor, 48-sixth temperature sensor, 51-first switch valve, 52-second switch valve, 61-third switch valve, 62-sixth switch valve, 71-fourth switch valve, 72-fifth on-off valve.
Detailed Description
The invention provides a condensed oil gas recovery system and a defrosting method, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below 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 3, the present invention provides a condensed oil gas recovery system, which includes an oil gas inlet 1, an oil gas outlet 2, a control device, a first oil gas treatment mechanism and a second oil gas treatment mechanism, wherein the oil gas inlet 1 is connected to an input end of the first oil gas treatment mechanism and an input end of the second oil gas treatment mechanism through a first switch portion; the output end of the first oil-gas treatment mechanism is respectively connected with the input end of the second oil-gas treatment mechanism and the oil-gas outlet 2 through a second switching part; the output end of the second oil-gas treatment mechanism is respectively connected with the input end of the first oil-gas treatment mechanism and the oil-gas outlet 2 through a third switching part; the first oil gas treatment mechanism, the second oil gas treatment mechanism, the first switch part, the second switch part and the third switch part are respectively electrically connected with the control device.
The application discloses condensation oil gas recovery system, including respectively with controlling means electric connection's first switch portion, second switch portion and third switch portion, controlling means makes the oil gas of treating retrieving turn the frost to arbitrary oil gas processing mechanism earlier through the operating condition of adjustment first switch portion, second switch portion and third switch portion, get into another oil gas processing mechanism again and carry out oil gas recovery, two oil gas processing mechanisms carry out the mode of defrosting in turn, can ensure the heat transfer effect of oil gas condenser, and can ensure the continuity of oil gas processing process, the gas that condensation oil gas recovery system discharged is all the time through cryogenic treatment, avoid appearing the problem that oil gas emission concentration exceeds standard; the oil gas after defrosting is cooled, and the refrigeration load of an oil gas treatment mechanism for recovering oil gas can be reduced, so that the working energy consumption of a condensed oil gas recovery system is reduced.
Further, referring to fig. 1 to 3, the first switching part includes a first switch valve 51 and a second switch valve 52 electrically connected to the control device, respectively, and the oil-gas inlet 1 is connected to the input end of the first oil-gas processing unit through the first switch valve 51, and is connected to the input end of the second oil-gas processing unit through the second switch valve 52; when the first oil and gas treatment mechanism executes the defrosting mode, the control device controls the first switch valve 51 to be opened and controls the second switch valve 52 to be closed.
In other embodiments, the first switching part includes a first three-way valve electrically connected to the control device, a first port of the first three-way valve is connected to the oil-gas inlet 1, a second port of the first three-way valve is connected to the input end of the first oil-gas mechanism, and a third port of the first three-way valve is connected to the input end of the second oil-gas processing mechanism; the control device adjusts the conduction state of the first three-way valve to adjust the conduction relation between the oil gas inlet 1 and the input end of the first oil gas treatment mechanism and the input end of the second oil gas treatment mechanism.
Further, referring to fig. 1 to 3, the second switching part includes a third switch valve 61 and a sixth switch valve 62 electrically connected to the control device, respectively, and the output end of the first oil and gas treatment mechanism is connected to the oil and gas outlet 2 through the third switch valve 61 and is connected to the input end of the second oil and gas treatment mechanism through the sixth switch valve 62; when the first oil and gas treatment mechanism executes the defrosting mode, the control device controls the sixth switching valve 62 to be opened and controls the third switching valve 61 to be closed.
In other embodiments, the second switching part includes a second three-way valve electrically connected to the control device, a first port of the second three-way valve is connected to the output end of the first oil and gas treatment mechanism, a second port of the second three-way valve is connected to the oil and gas outlet 2, and a third port of the second three-way valve is connected to the input end of the second oil and gas treatment mechanism; the control device adjusts the conduction state of the second three-way valve to adjust the conduction relation between the output end of the first oil-gas treatment mechanism and the oil-gas outlet 2 as well as the input end of the second oil-gas treatment mechanism.
Further, referring to fig. 1 to 3, the third switching part includes a fourth switching valve 71 and a fifth switching valve 72 electrically connected to the control device, respectively, and the output end of the second oil and gas treatment mechanism is connected to the oil and gas outlet 2 through the fourth switching valve 71 and is connected to the input end of the first oil and gas treatment mechanism through the fifth switching valve 72; when the first oil and gas treatment mechanism executes the defrosting mode, the control device controls the fourth switch valve 71 to be opened and controls the fifth switch valve 72 to be closed.
In other embodiments, the third switch portion comprises a third three-way valve electrically connected to the control device, a first port of the third three-way valve is connected to the output end of the second oil and gas treatment mechanism, a second port of the third three-way valve is connected to the oil and gas outlet 2, and a third port of the third three-way valve is connected to the input end of the first oil and gas treatment mechanism; the control device adjusts the conduction state of the third three-way valve to adjust the conduction relation between the output end of the second oil gas treatment mechanism and the oil gas outlet 2 as well as the input end of the first oil gas treatment mechanism.
Further, referring to fig. 1 to 3, the first oil-gas treatment mechanism includes a first oil-gas condenser 31, a second oil-gas condenser 32, a third oil-gas condenser 33, a first gas-liquid separation tank 34, and a first tail gas heater 35, which are connected in sequence; the input end of the first oil-gas condenser 31 is connected with the oil-gas inlet 1 through the first switch part and is connected with the output end of the second oil-gas processing mechanism through the third switch part; the output end of the first tail gas heater 35 is connected with the input end of the second oil gas treatment mechanism and the oil gas outlet 2 through the second switch part respectively.
In other embodiments, the number of the oil-gas condensers included in the first oil-gas treatment mechanism can be adjusted according to the oil-gas treatment load, or whether the first gas-liquid separation tank 34 and the first exhaust gas heater 35 are provided or not and the respective types are changed are selected; in addition, the connection relation between the output end of the second oil-gas treatment mechanism and three oil-gas condensers in the first oil-gas treatment mechanism can be adjusted according to the oil-gas treatment load; furthermore, by changing the arrangement of the valves and the pipelines, the defrosting state of the oil-gas condenser can be adjusted, for example, oil gas input from an oil-gas inlet enters all the oil-gas condensers of the first oil-gas treatment mechanism at the same time, so that the simultaneous defrosting of all the oil-gas condensers is realized; or the oil gas enters one or more oil gas condensers of the first oil gas treatment mechanism to defrost part of the oil gas condensers.
Further, referring to fig. 1 to 3, the first oil-gas processing mechanism further includes a first temperature sensor 36, a second temperature sensor 37 and a third temperature sensor 38 that are electrically connected to the control device, respectively, where the first temperature sensor 36 is disposed on a connection pipeline between the first oil-gas condenser 31 and the second oil-gas condenser 32, the second temperature sensor 37 is disposed on a connection pipeline between the second oil-gas condenser 32 and the third oil-gas condenser 33, and the third temperature sensor 38 is disposed on a connection pipeline between the third oil-gas condenser 33 and the first gas-liquid separation tank 34; the control device can correspondingly adjust the cold source input quantities of the first oil-gas condenser 31, the second oil-gas condenser 32 and the third oil-gas condenser 33 according to the real-time temperatures fed back by the three temperature sensors in the first oil-gas treatment mechanism, so that the working energy consumption of the condensed oil-gas recovery system is reduced; in one embodiment, the first temperature sensor 36, the second temperature sensor 37, and the third temperature sensor 38 are each thermocouples.
Further, referring to fig. 1 to 3, the second oil gas treatment mechanism includes a fourth oil gas condenser 41, a fifth oil gas condenser 42, a sixth oil gas condenser 43, a second gas-liquid separation tank 44, and a second tail gas heater 45, which are connected in sequence; the input end of the fourth oil-gas condenser 41 is connected with the oil-gas inlet 1 through the first switching part and is connected with the output end of the first oil-gas treatment mechanism through the third switching part; and the output end of the second tail gas heater 45 is respectively connected with the input end of the first oil-gas treatment mechanism and the oil-gas outlet 2 through the third switch part.
In other embodiments, the number of the oil-gas condensers included in the second oil-gas treatment mechanism can be adjusted according to the oil-gas treatment load, or whether the second gas-liquid separation tank 44 and the second exhaust gas heater 45 are provided or not and the respective types are changed are selected; in addition, the connection relation between the output end of the first oil-gas treatment mechanism and three oil-gas condensers in the second oil-gas treatment mechanism can be adjusted according to the oil-gas treatment load; furthermore, by changing the arrangement of the valves and the pipelines, the defrosting state of the oil-gas condenser can be adjusted, for example, oil gas input from the oil-gas inlet enters all the oil-gas condensers of the second oil-gas treatment mechanism at the same time, so that the simultaneous defrosting of all the oil-gas condensers is realized; or the oil gas enters one or more oil gas condensers of the second oil gas treatment mechanism to defrost part of the oil gas condensers.
Further, referring to fig. 1 to 3, the second oil-gas treatment mechanism further includes a fourth temperature sensor 46, a fifth temperature sensor 47 and a sixth temperature sensor 48 that are electrically connected to the control device, respectively, where the fourth temperature sensor 46 is disposed on a connection pipeline between the fourth oil-gas condenser 41 and the fifth oil-gas condenser 42, the fifth temperature sensor 47 is disposed on a connection pipeline between the fifth oil-gas condenser 42 and the sixth oil-gas condenser 43, and the sixth temperature sensor 48 is disposed on a connection pipeline between the sixth oil-gas condenser 43 and the second gas-liquid separation tank 44; the control device can correspondingly adjust the cold source input quantities of the fourth oil gas condenser 41, the fifth oil gas condenser 42 and the sixth oil gas condenser 43 according to the real-time temperatures fed back by the three temperature sensors in the second oil gas treatment mechanism, so that the working energy consumption of the condensed oil gas recovery system is reduced; in one embodiment, the fourth temperature sensor 46, the fifth temperature sensor 47, and the sixth temperature sensor 48 are thermocouples, respectively.
The application discloses condensation vapor recovery system, when first vapor treatment mechanism execution defrosting mode, second vapor treatment mechanism carries out the condensation to oil gas and retrieves: oil gas to be recovered enters the system from the oil gas inlet 1, at the moment, the first switch valve 51 is opened, the second switch valve 52 is closed, the oil gas sequentially enters the first oil gas condenser 31, the second oil gas condenser 32 and the third oil gas condenser 33 to realize defrosting, the cooled oil gas is subjected to gas-liquid separation by the first gas-liquid separation tank 34 and then enters the first tail gas heater 35, and at the moment, the heat source of the first tail gas heater 35 is cut off; the control device controls the third switch valve 61 to be closed and controls the sixth switch valve 62 to be opened, oil gas output by the first tail gas heater 35 sequentially enters the fourth oil gas condenser 41, the fifth oil gas condenser 42 and the sixth oil gas condenser 43, the oil gas is further cooled, condensed and recovered, low-concentration oil gas enters the second tail gas heater 45 after being subjected to gas-liquid separation by the second gas-liquid separation tank 44, at the moment, the fifth switch valve 72 is closed, the fourth switch valve 71 is opened, and the heated low-concentration oil gas enters the next treatment unit through the oil gas outlet 2; and the condensate generated by the six oil-gas condensers and the condensate generated by the two gas-liquid separators respectively flow out from respective condensate outlets and are collected.
When the second oil gas processing mechanism carries out the defrosting mode, the first oil gas processing mechanism carries out condensation recovery on oil gas: oil gas to be recovered enters the system from the oil gas inlet 1, at the moment, the second switch valve 52 is opened, the first switch valve 51 is closed, the oil gas sequentially enters the fourth oil gas condenser 41, the fifth oil gas condenser 42 and the sixth oil gas condenser 43 to realize defrosting, the cooled oil gas is subjected to gas-liquid separation by the second gas-liquid separation tank 44 and then enters the second tail gas heater 45, and at the moment, the heat source of the second tail gas heater 45 is cut off; the control device controls the fourth switch valve 71 to be closed and controls the fifth switch valve 72 to be opened, oil gas output by the second tail gas heater 45 sequentially enters the first oil gas condenser 31, the second oil gas condenser 32 and the third oil gas condenser 33, the oil gas is further cooled, condensed and recovered, low-concentration oil gas enters the first tail gas heater 35 after being subjected to gas-liquid separation by the first gas-liquid separation tank 34, at the moment, the sixth switch valve 62 is closed, the third switch valve 61 is opened, and the heated low-concentration oil gas enters the next processing unit through the oil gas outlet 2; and the condensate generated by the six oil-gas condensers and the two gas-liquid separators respectively flows out from respective condensate outlets and is collected.
Referring to fig. 4 and 5, the present invention further provides a defrosting method for a condensed oil-gas recovery system, which is used for defrosting the condensed oil-gas recovery system; the defrosting method comprises the following steps:
s101, when a control instruction of defrosting by the first oil-gas treatment mechanism is received, namely the first oil-gas treatment mechanism executes a defrosting mode, and the control device controls the condensed oil-gas recovery system to execute the steps S201 to S204;
s102, when a control instruction of defrosting by the second oil-gas treatment mechanism is received, namely the second oil-gas treatment mechanism executes a defrosting mode, and the control device controls the oil-gas condensation recovery system to execute the steps S301 to S304;
s201, the control device controls the first oil gas treatment mechanism to stop refrigerating and enter a defrosting state, and controls the second oil gas treatment mechanism to enter a refrigerating state so as to carry out condensation recovery treatment on oil gas;
s202, the control device controls the first switching part to conduct a connecting pipeline between the oil gas inlet and the first oil gas treatment mechanism, and controls the first switching part to close the connecting pipeline between the oil gas inlet and the second oil gas treatment mechanism;
s203, the control device controls the second switching part to conduct a connecting pipeline between the output end of the first oil-gas treatment mechanism and the input end of the second oil-gas treatment mechanism, and controls the second switching part to close the connecting pipeline between the output end of the first oil-gas treatment mechanism and an oil-gas outlet;
s204, the control device controls the third switch part to conduct a connecting pipeline between the output end of the second oil-gas treatment mechanism and an oil-gas outlet, and controls the third switch part to close the connecting pipeline between the output end of the second oil-gas treatment mechanism and the input end of the first oil-gas treatment mechanism;
s301, the control device controls the second oil gas treatment mechanism to stop refrigerating and enter a defrosting state, and controls the first oil gas treatment mechanism to enter a refrigerating state so as to carry out condensation recovery treatment on oil gas;
s302, the control device controls the first switching part to conduct a connecting pipeline between the oil gas inlet and the second oil gas treatment mechanism, and controls the first switching part to close the connecting pipeline between the oil gas inlet and the first oil gas treatment mechanism;
s303, the control device controls the third switch part to conduct a connecting pipeline between the output end of the second oil-gas treatment mechanism and the input end of the first oil-gas treatment mechanism, and controls the third switch part to close the connecting pipeline between the output end of the second oil-gas treatment mechanism and an oil-gas outlet;
s304, the control device controls the second switching part to conduct a connecting pipeline between the output end of the first oil-gas treatment mechanism and the oil-gas outlet, and controls the second switching part to close the connecting pipeline between the output end of the first oil-gas treatment mechanism and the input end of the second oil-gas treatment mechanism.
The application discloses defrosting method, through the operating condition of adjustment first switch portion, second switch portion and third switch portion, make the gas that treats to retrieve earlier to arbitrary oil gas treatment mechanism frost, reentrant another oil gas treatment mechanism carries out vapor recovery system again, two vapor recovery system mechanisms carry out in turn and change the frost mode, can avoid the vapor condenser surface to appear the problem of frosting, optimize vapor condenser's heat transfer effect, and can ensure the continuity of vapor treatment process, the gas that condensation vapor recovery system discharged is all the time through cryogenic treatment, avoid appearing the problem that vapor discharge concentration exceeds standard.
Further, referring to fig. 2, fig. 3 and fig. 5, the first switching part includes a first switching valve 51 and a second switching valve 52, and the oil and gas inlet 1 is connected to the input end of the first oil and gas processing unit through the first switching valve 51, and is connected to the input end of the second oil and gas processing unit through the second switching valve 52; the second switching part comprises a third switch valve 61 and a sixth switch valve 62, and the output end of the first oil-gas treatment mechanism is connected with the oil-gas outlet 2 through the third switch valve 61 and is connected with the input end of the second oil-gas treatment mechanism through the sixth switch valve 62; the third switch part comprises a fourth switch valve 71 and a fifth switch valve 72, the output end of the second oil-gas treatment mechanism is connected with the oil-gas outlet 2 through the fourth switch valve 71 and is connected with the input end of the first oil-gas treatment mechanism through the fifth switch valve 72; the steps S202 to S204 are specifically:
s202, the control device controls the first switch valve 51 to be opened and controls the second switch valve 52 to be closed;
s203, the control device controls the sixth switching valve 62 to be opened and controls the third switching valve 61 to be closed;
s204, the control device controls the fourth switching valve 71 to be opened and controls the fifth switching valve 72 to be closed; at the moment, the oil gas sequentially enters a first oil gas condenser 31, a second oil gas condenser 32 and a third oil gas condenser 33 to realize defrosting, the cooled oil gas is subjected to gas-liquid separation by a first gas-liquid separation tank 34 and then enters a first tail gas heater 35, and the heat source of the first tail gas heater 35 is cut off; the oil gas output by the first tail gas heater 35 sequentially enters a fourth oil gas condenser 41, a fifth oil gas condenser 42 and a sixth oil gas condenser 43, the oil gas is further cooled, condensed and recovered, the low-concentration oil gas is subjected to gas-liquid separation by a second gas-liquid separation tank 44 and then enters a second tail gas heater 45, and the heated low-concentration oil gas enters the next processing unit through an oil gas outlet 2.
The steps S302 to S304 specifically include:
s302, the control device controls the second switch valve 52 to be opened and controls the first switch valve 51 to be closed;
s303, the control device controls the fifth switch valve 72 to be opened and controls the fourth switch valve 71 to be closed;
s304, the control device controls the third switch valve 61 to be opened and controls the sixth switch valve 62 to be closed; at this time, the oil gas sequentially enters a fourth oil gas condenser 41, a fifth oil gas condenser 42 and a sixth oil gas condenser 43 to realize defrosting, the cooled oil gas is subjected to gas-liquid separation by a second gas-liquid separation tank 44 and then enters a second tail gas heater 45, and the heat source of the second tail gas heater 45 is cut off; the oil gas output by the second tail gas heater 45 sequentially enters the first oil gas condenser 31, the second oil gas condenser 32 and the third oil gas condenser 33, the oil gas is further cooled, condensed and recycled, the low-concentration oil gas is subjected to gas-liquid separation by the first gas-liquid separation tank 34 and then enters the first tail gas heater 35, and the warmed low-concentration oil gas enters the next processing unit through the oil gas outlet 2.
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 (10)
1. A condensed oil gas recovery system comprises an oil gas inlet, an oil gas outlet and a control device, and is characterized by further comprising a first oil gas treatment mechanism and a second oil gas treatment mechanism, wherein the oil gas inlet is respectively connected with the input end of the first oil gas treatment mechanism and the input end of the second oil gas treatment mechanism through a first switching part; the output end of the first oil-gas treatment mechanism is respectively connected with the input end of the second oil-gas treatment mechanism and the oil-gas outlet through a second switching part; the output end of the second oil-gas treatment mechanism is respectively connected with the input end of the first oil-gas treatment mechanism and the oil-gas outlet through a third switching part; the first oil gas treatment mechanism, the second oil gas treatment mechanism, the first switch part, the second switch part and the third switch part are respectively electrically connected with the control device.
2. The condensate oil and gas recovery system of claim 1, wherein the first switching part comprises a first switch valve and a second switch valve electrically connected to the control device, respectively, and the oil and gas inlet is connected to the input of the first oil and gas treatment mechanism through the first switch valve and to the input of the second oil and gas treatment mechanism through the second switch valve.
3. The condensate oil and gas recovery system according to claim 1, wherein the second switching part comprises a third switch valve and a sixth switch valve electrically connected to the control device, respectively, and the output end of the first oil and gas treatment mechanism is connected to the oil and gas outlet through the third switch valve and is connected to the input end of the second oil and gas treatment mechanism through the sixth switch valve.
4. The condensate oil and gas recovery system according to claim 1, wherein the third switching part comprises a fourth switching valve and a fifth switching valve electrically connected to the control device, respectively, and the output end of the second oil and gas treatment mechanism is connected to the oil and gas outlet through the fourth switching valve and is connected to the input end of the first oil and gas treatment mechanism through the fifth switching valve.
5. The condensed oil-gas recovery system according to claim 1, wherein the first oil-gas treatment mechanism comprises a first oil-gas condenser, a second oil-gas condenser, a third oil-gas condenser, a first gas-liquid separation tank and a first tail gas heater which are connected in sequence; the input end of the first oil-gas condenser is connected with the oil-gas inlet through the first switching part and is connected with the output end of the second oil-gas processing mechanism through the third switching part; the output end of the first tail gas heater is connected with the input end of the second oil gas treatment mechanism and the oil gas outlet respectively through the second switch part.
6. The condensate oil and gas recovery system according to claim 5, wherein the first oil and gas treatment mechanism further comprises a first temperature sensor, a second temperature sensor and a third temperature sensor which are electrically connected with the control device respectively, the first temperature sensor is arranged on a connecting pipeline between the first oil and gas condenser and the second oil and gas condenser, the second temperature sensor is arranged on a connecting pipeline between the second oil and gas condenser and the third oil and gas condenser, and the third temperature sensor is arranged on a connecting pipeline between the third oil and gas condenser and the first gas-liquid separation tank.
7. The condensate oil-gas recovery system of claim 1, wherein the second oil-gas treatment mechanism comprises a fourth oil-gas condenser, a fifth oil-gas condenser, a sixth oil-gas condenser, a second gas-liquid separation tank and a second tail gas heater, which are connected in sequence; the input end of the fourth oil-gas condenser is connected with the oil-gas inlet through the first switching part and is connected with the output end of the first oil-gas processing mechanism through the third switching part; the output end of the second tail gas heater is connected with the input end of the first oil gas treatment mechanism and the oil gas outlet through the third switch part respectively.
8. The system of claim 7, wherein the second oil and gas treatment mechanism further comprises a fourth temperature sensor, a fifth temperature sensor and a sixth temperature sensor electrically connected to the control device, respectively, the fourth temperature sensor is disposed on a connection pipeline between the fourth oil and gas condenser and the fifth oil and gas condenser, the fifth temperature sensor is disposed on a connection pipeline between the fifth oil and gas condenser and the sixth oil and gas condenser, and the sixth temperature sensor is disposed on a connection pipeline between the sixth oil and gas condenser and the second oil and gas separation tank.
9. A method of defrosting a condensate vapor recovery system, characterized by effecting defrosting of the condensate vapor recovery system according to any one of claims 1 to 8; the defrosting method comprises the following steps:
s101, when a control instruction of defrosting of the first oil-gas treatment mechanism is received, the control device controls the condensed oil-gas recovery system to execute the steps S201 to S204;
s102, when a control instruction of defrosting by the second oil-gas treatment mechanism is received, the control device controls the oil-gas condensation recovery system to execute the steps S301 to S304;
s201, the control device controls the first oil gas treatment mechanism to stop refrigerating and enter a defrosting state, and controls the second oil gas treatment mechanism to enter a refrigerating state so as to carry out condensation recovery treatment on oil gas;
s202, the control device controls the first switching part to conduct a connecting pipeline between the oil gas inlet and the first oil gas treatment mechanism, and controls the first switching part to close the connecting pipeline between the oil gas inlet and the second oil gas treatment mechanism;
s203, the control device controls the second switching part to conduct a connecting pipeline between the output end of the first oil-gas treatment mechanism and the input end of the second oil-gas treatment mechanism, and controls the second switching part to close the connecting pipeline between the output end of the first oil-gas treatment mechanism and an oil-gas outlet;
s204, the control device controls the third switch part to conduct a connecting pipeline between the output end of the second oil-gas treatment mechanism and an oil-gas outlet, and controls the third switch part to close the connecting pipeline between the output end of the second oil-gas treatment mechanism and the input end of the first oil-gas treatment mechanism;
s301, the control device controls the second oil gas treatment mechanism to stop refrigerating and enter a defrosting state, and controls the first oil gas treatment mechanism to enter a refrigerating state so as to carry out condensation recovery treatment on oil gas;
s302, the control device controls the first switching part to conduct a connecting pipeline between the oil gas inlet and the second oil gas treatment mechanism, and controls the first switching part to close the connecting pipeline between the oil gas inlet and the first oil gas treatment mechanism;
s303, the control device controls the third switch part to conduct a connecting pipeline between the output end of the second oil-gas treatment mechanism and the input end of the first oil-gas treatment mechanism, and controls the third switch part to close the connecting pipeline between the output end of the second oil-gas treatment mechanism and an oil-gas outlet;
s304, the control device controls the second switching part to conduct a connecting pipeline between the output end of the first oil-gas treatment mechanism and the oil-gas outlet, and controls the second switching part to close the connecting pipeline between the output end of the first oil-gas treatment mechanism and the input end of the second oil-gas treatment mechanism.
10. A method of defrosting a condensate vapor recovery system in accordance with claim 9, wherein the first switching section comprises a first switching valve and a second switching valve, and the vapor inlet is connected to the input of the first vapor treatment device through the first switching valve and to the input of the second vapor treatment device through the second switching valve; the second switching part comprises a third switching valve and a sixth switching valve, and the output end of the first oil-gas treatment mechanism is connected with the oil-gas outlet through the third switching valve and is connected with the input end of the second oil-gas treatment mechanism through the sixth switching valve; the third switch part comprises a fourth switch valve and a fifth switch valve, and the output end of the second oil gas treatment mechanism is connected with the oil gas outlet through the fourth switch valve and is connected with the input end of the first oil gas treatment mechanism through the fifth switch valve; the steps S201 to S203 are specifically:
s201, the control device controls the first switch valve to be opened and controls the second switch valve to be closed;
s202, the control device controls the sixth switching valve to be opened and controls the third switching valve to be closed;
and S203, the control device controls the fourth switching valve to be opened and controls the fifth switching valve to be closed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114931763A (en) * | 2022-06-02 | 2022-08-23 | 杭州鼎玺智能技术有限公司 | Efficient and economical online oil gas recovery monitoring system |
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