CN211585902U - Oil gas recovery system - Google Patents
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- CN211585902U CN211585902U CN201921825552.0U CN201921825552U CN211585902U CN 211585902 U CN211585902 U CN 211585902U CN 201921825552 U CN201921825552 U CN 201921825552U CN 211585902 U CN211585902 U CN 211585902U
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Abstract
The application discloses an oil gas recovery system, which comprises a first adsorber and a second adsorber; the absorber is respectively connected with the first absorber and the second absorber and is used for absorbing the oil gas absorbed by the first absorber and the second absorber by adopting an absorbent; a refrigerator for cooling the absorbent; the first heat exchanger is positioned in the first absorber, is respectively connected with the refrigerator and the absorber and is used for exchanging the heat of the cooled absorbent and the oil gas; and the second heat exchanger is positioned in the second adsorber, is respectively connected with the refrigerator and the absorber and is used for exchanging heat of the cooled absorbent and the oil gas, wherein when the first adsorber adsorbs the oil gas, the absorber absorbs the oil gas adsorbed by the second adsorber, the cooled absorbent enters the absorber through the first heat exchanger, when the second adsorber adsorbs the oil gas, the absorber absorbs the oil gas adsorbed by the first adsorber, and the cooled absorbent enters the absorber through the second heat exchanger.
Description
Technical Field
The utility model relates to an oil gas treatment technical field, more specifically relates to an oil gas recovery system.
Background
Because fuels such as gasoline, diesel oil and the like are easy to volatilize, oil gas generated after volatilization can pollute the environment, and if the oil gas can not be collected and utilized, the fuel is also a waste.
In the prior art, the oil gas is generally recovered by adopting a mode of 'adsorption + vacuum desorption + absorption', however, the following problems can be caused in the adsorption and absorption processes:
(1) the temperature of the oil gas is too high, which is not beneficial to being absorbed by the absorbent;
(2) the adsorption process is a heat release process, so that the temperature of the adsorbent is increased, safety risks exist, and the efficiency of adsorbing oil gas by the adsorbent at a higher temperature is reduced;
(3) the oil gas temperature after vacuum analysis is high, and the absorption efficiency is low in the process of liquid absorbent absorption.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, an object of the utility model is to provide an oil gas recovery system, only cool off to the absorbent of oil gas, can solve simultaneously adsorb with absorptive high temperature and exothermic problem, improved adsorb and absorption efficiency to adopt the method of first adsorber and the alternate operation of second adsorber, improved oil gas recovery system's whole work efficiency.
The embodiment of the utility model provides an oil gas recovery system, include: the first adsorber and the second adsorber are used for adsorbing oil gas by adopting an adsorbent; the absorber is respectively connected with the first absorber and the second absorber and is used for absorbing the oil gas absorbed by the first absorber and the second absorber by adopting an absorbent; a refrigerator for cooling the absorbent; the first heat exchanger is positioned in the first absorber, is respectively connected with the refrigerator and the absorber, and is used for exchanging the heat of the cooled absorbent and the oil gas; and the second heat exchanger is positioned in the second adsorber, is respectively connected with the refrigerator and the absorber and is used for exchanging heat of the cooled absorbent and the oil gas, wherein when the first adsorber adsorbs the oil gas, the absorber absorbs the oil gas adsorbed by the second adsorber, the cooled absorbent enters the absorber through the first heat exchanger, when the second adsorber adsorbs the oil gas, the absorber absorbs the oil gas adsorbed by the first adsorber, and the cooled absorbent enters the absorber through the second heat exchanger.
Preferably, the first adsorber comprises: a first chamber; the first heat exchangers are distributed along the longitudinal direction of the first chamber and used for bearing the adsorbent, and the number of the first heat exchangers is multiple and is alternately distributed with the plurality of first support structures; the second adsorber includes: a second chamber; and a plurality of second support structures which are positioned in the second chamber, distributed along the longitudinal direction of the second chamber and used for bearing the adsorbent, wherein the number of the second heat exchangers is a plurality, and the second heat exchangers and the plurality of second support structures are alternately distributed, and the oil gas enters from the lower parts of the first chamber and the second chamber.
Preferably, the number of first heat exchangers located below the first support structure of the bottom is greater than the number of first heat exchangers between a plurality of the first support structures; the number of second heat exchangers located below the second support structure at the bottom is greater than the number of second heat exchangers between the plurality of second support structures.
Preferably, a plurality of the first heat exchangers are connected in series, the first heat exchanger positioned at the bottom is connected with the refrigerator, and the first heat exchanger positioned at the top is connected with the absorber; the second heat exchangers are connected in series, the second heat exchanger positioned at the bottom is connected with the refrigerator, the second heat exchanger positioned at the top is connected with the absorber, and the series positions of the first heat exchangers and the second heat exchangers are respectively positioned in the first chamber and the second chamber.
Preferably, the refrigerator further comprises an external heat exchanger which is respectively connected with the first chamber and the second chamber, and the first heat exchanger and the second heat exchanger are respectively connected with the refrigerator through the external heat exchanger.
Preferably, the system further comprises a third heat exchanger which is respectively connected with the absorber and the refrigerator, wherein before the refrigerator cools the absorbent, the absorbent to be cooled is subjected to primary heat exchange with the absorbent discharged from the absorber through the third heat exchanger.
Preferably, the refrigerator cools the absorbent in an air cooling manner, and the oil and gas recovery system further includes: the gas collecting hood is positioned above the refrigerator and used for collecting hot air generated by the refrigerator; the first sweeping valve is respectively connected with the gas collecting hood and the first cavity; and the second purging valve is respectively connected with the gas collecting hood and the second cavity, wherein when the absorber absorbs the oil gas adsorbed by the first adsorber, the first purging valve is used for introducing the hot air into the first cavity, and when the absorber absorbs the oil gas adsorbed by the second adsorber, the second purging valve is used for introducing the hot air into the second cavity.
Preferably, the first heat exchanger and the second heat exchanger are fin type heat exchangers.
Preferably, the adsorbent comprises one or a combination of activated carbon, silica gel and molecular sieves.
Preferably, the temperature range of the absorbent output by the refrigerator is 10-15 ℃, and the temperature range of the absorbent output by the first heat exchanger or the second heat exchanger is 15-25 ℃.
According to the utility model discloses vapor recovery system, adsorb oil gas through first adsorber and second adsorber in turn, absorbent after the cooling carries out the heat exchange through heat exchanger and oil gas as the coolant, the oil gas temperature has been reduced, adsorption efficiency has been improved, when one of them adsorber adsorbs oil gas, the oil gas of absorber in to another adsorber is absorbed, meanwhile, absorbent in the heat exchanger is provided to in the absorber, be used for absorbing oil gas, although this moment the absorbent has carried out the heat exchange with oil gas, but the temperature still is less than oil gas, absorbent cooled by the refrigerator is direct and oil gas contact in the absorber, can play the effect of cooling at the absorption in-process, thereby absorption efficiency has been improved.
Furthermore, in the cavity of adsorber, multilayer adsorbent distributes along longitudinal direction with the heat exchanger in turn, gets into the back from the cavity below when oil gas, is adsorbed by multilayer adsorbent layer by layer, before every layer adsorbent adsorbs oil gas, and oil gas all is through lower floor's heat exchanger cooling, has further improved adsorption efficiency.
Therefore, the utility model discloses oil gas recovery system only cools off to the absorbent of oil gas, can solve the high temperature and the exothermic problem in absorption and the absorption process simultaneously, has improved absorption and absorption efficiency to adopt the method of first adsorber and the alternate operation of second adsorber, improved oil gas recovery system's whole work efficiency.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of an oil gas recovery system according to a first embodiment of the present invention.
Fig. 2 shows a schematic view of the structure of the interior of the first adsorber of fig. 1.
Fig. 3 shows a schematic structural diagram of an oil gas recovery system according to a second embodiment of the present invention.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
Numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in the following description in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
Fig. 1 shows a schematic structural diagram of an oil gas recovery system according to a first embodiment of the present invention, and fig. 2 shows a schematic structural diagram of the inside of the first adsorber in fig. 1, wherein the inside of the second adsorber has the same structure as the first adsorber, and reference may be made to fig. 2.
As shown in fig. 1 and fig. 2, the oil gas recovery system according to the first embodiment of the present invention includes: the system comprises a first adsorber 110, a second adsorber 120, an absorber 130, a plurality of first heat exchangers 141, a plurality of second heat exchangers 142, a third heat exchanger 143, a refrigerator 150, a gas collecting hood 160, an oil supply pump 171, an oil return pump 172, an induced draft fan 173, a vacuum pump 180, pipelines for connecting the structures and control valves on the pipelines.
In this embodiment, the control valve includes: exhaust valves 11, 12, back- pressure valves 13, 14, purge valves 15, 16, supply valves 17, 18, vacuum valves 19, 20, and intake valves 21, 22. The exhaust valve 11, the back pressure valve 13, the purge valve 15, the vacuum valve 19 and the intake valve 21 are used for controlling the gas inlet and outlet states in the first adsorber 110 and between the first adsorber 130, and the oil supply valve 17 is used for controlling whether the absorbent in the system flows through the first heat exchanger 141. The exhaust valve 12, the back-pressure valve 14, the purge valve 16, the vacuum valve 20 and the intake valve 22 are used for controlling the gas inlet and outlet states in the second adsorber 120 and between the second adsorber 130, and the supply valve 18 is used for controlling whether the absorbent in the system flows through the second heat exchanger 142.
The first adsorber 110 includes a first chamber 111 and a plurality of first support structures 112, and the plurality of first support structures 112 are located in the first chamber 111 and distributed along a longitudinal direction of the first chamber 111 for carrying and fixing the adsorbent. The second adsorber 120 includes a second chamber 121 and a plurality of second support structures 122, wherein the plurality of second support structures 122 are located in the second chamber 121 and distributed along a longitudinal direction of the second chamber 121 for supporting and fixing the adsorbent.
In the present embodiment, the first support structure 112 and the second support structure 122 are support nets, and the adsorbent is one or a combination of activated carbon, silica gel and molecular sieve. However, the embodiments of the present invention are not limited thereto, and those skilled in the art may perform other arrangements of the support structure and the adsorbent as needed.
A plurality of first heat exchangers 141 are located in the first chamber 111, alternately distributed with the plurality of first support structures 112, the plurality of first heat exchangers 141 are connected in series by a connection 101 (e.g., a communication pipe), the first heat exchanger 141 located at the bottom is connected with the refrigerator 150, and the first heat exchanger 141 located at the top is connected with the absorber 130. A plurality of second heat exchangers 142 are positioned in the second chamber 121, alternately distributed with the plurality of second support structures 122, the plurality of second heat exchangers 142 are connected in series by a connection 101, the second heat exchanger 142 positioned at the bottom is connected with the refrigerator 150, and the second heat exchanger 142 positioned at the top is connected with the absorber 130. The third heat exchanger 143 is connected to the absorber 130 and the refrigerator 150, respectively. The serial portion of the first heat exchangers 141 and the serial portion of the second heat exchangers 142 are also located inside the first chamber 111 and the second chamber 121, respectively. Compared with the serial part 101 located outside the chamber, the serial part 101 located inside can save the length of the communication pipeline, and meanwhile, the serial part 101 can also be used for reducing the oil gas temperature.
In this embodiment, the first heat exchanger 141 and the second heat exchanger 142 are fin heat exchangers. Because the inner space of the chamber is limited, the temperature of the oil gas needs to be reduced as much as possible before adsorption, and the adsorption amount is considered preferentially during adsorption, the number of the first heat exchangers 141 below the first support structure 112 at the bottom is greater than that of the first heat exchangers 141 among the plurality of first support structures 112. In some specific embodiments, the number of first heat exchangers 141 located below the bottom first support structure 112 is two layers, and the number of first heat exchangers 141 between the first support structures 112 is one layer. The second heat exchanger 142 is provided in correspondence with the first heat exchanger 141 and will not be described herein. However, the embodiments of the present invention are not limited thereto, and those skilled in the art may perform other arrangements on the number and distribution of the first heat exchanger 141 and the second heat exchanger 142 as needed.
The absorber 130 is divided into an absorption section and a liquid storage section, and the absorption section is located above the liquid storage section. The absorber 130 is connected to the first chamber 111 and the second chamber 121 through a vacuum pump 180, respectively.
The utility model discloses refrigerator 150 adopts the forced air cooling mode to cool off the absorbent, and gas collecting channel 160 is located refrigerator 150 top for collect the hot-blast that refrigerator 150 produced. The gas collecting channel 160 is connected to the first chamber 111 via a purge valve 15 (first purge valve) and to the second chamber 121 via a purge valve 16 (second purge valve).
The operation principle of the oil gas recovery system according to the first embodiment of the present invention will be described in detail with reference to fig. 1.
When oil and gas are required to be recycled and treated, the induced draft fan 173 is turned on to introduce the oil and gas into the system, and the oil supply pump 171 is turned on to introduce the absorbent into the system, wherein the absorbent can be oil for producing the oil and gas. However, the embodiment of the present invention is not limited to this, in some alternative embodiments, the induced draft fan 173 may be removed, and the oil gas is introduced through positive pressure, for example, when the oil is delivered to the tank truck, the pressure in the tank truck may rise, and the oil gas in the tank truck automatically enters the oil gas recovery system.
First, the oil supply valve 17, the exhaust valve 11, and the intake valve 21 are opened, and the exhaust valve 12, the back- pressure valves 13 and 14, the purge valves 15 and 16, the oil supply valve 18, the vacuum valves 19 and 20, and the intake valve 22 are closed. Oil and gas enter from the bottom of the first chamber 111 through a pipeline and are discharged from the top. The absorbent reaches the refrigerator 150 through the third heat exchanger 143, the cooled absorbent enters the first heat exchanger 141 at the bottommost portion in the first chamber 111 through a pipeline, then sequentially enters the first heat exchangers 141 at each layer from bottom to top, flows out from the first heat exchanger 141 below the first supporting structure 112 at the topmost portion, is sent to the absorber 130 through a pipeline, is sprayed from top to bottom at the absorbing section of the absorber 130, is temporarily stored in the liquid storage section of the absorber 130, and is sent to the third heat exchanger 143 through the oil return pump 172 and finally is sent back to the oil storage tank. In the third heat exchanger 143, the absorbent fed into the system by the oil supply pump 171 performs preliminary heat exchange with the absorbent fed out of the system from the oil return pump 172, reducing the power consumption of the refrigerator 150.
In this step, high-temperature and high-concentration oil gas enters from the lower end of the first chamber 111, first exchanges heat with the first heat exchanger 141 at the bottom to reduce the temperature, then passes through the first support structure 112 at the bottom, and part of the oil gas is adsorbed by the adsorbent, in this process, a certain amount of heat is generated, so that the temperature rises, the gas continues to circulate upwards, is exchanged heat by the first heat exchanger 141 at the middle layer to reduce the temperature, then the oil gas continues to be adsorbed by the adsorbent at the upper layer, and after sequentially flowing through the first heat exchanger 141 and the adsorbent at each layer, the residual gas is finally discharged from the top of the first chamber 111.
Further, after the first adsorber 110 operates for 15 to 20 minutes, the exhaust valve 12, the intake valve 22, the oil supply valve 18 and the vacuum valve 19 are opened, and the exhaust valve 11, the back pressure valves 13 and 14, the purge valves 15 and 16, the oil supply valve 17, the vacuum valve 20 and the intake valve 21 are closed. Adsorption treatment of hydrocarbons using the second adsorber 120 is initiated and absorption treatment of hydrocarbons using the absorber 130 is initiated in the first adsorber 110. The absorbent fed into the system by the oil supply pump 171 firstly passes through the third heat exchanger 143 to exchange heat with the cooled absorbent primarily, then is cooled to 10-15 ℃ in the refrigerator 150, the cooled absorbent enters the second heat exchanger 142 in the second chamber 121 through the oil supply valve 18 to exchange heat with oil gas, the temperature of the cooled absorbent can rise to 15-25 ℃ after heat exchange, and finally enters the top of the absorption section of the absorber 130 to be sprayed from top to bottom and temporarily stored in the liquid storage section of the absorber 130, the cooled absorbent in the liquid storage section is fed to the third heat exchanger 143 by the oil return pump 172 to exchange heat with the absorbent entering the system, and finally the cooled absorbent is fed back to the oil storage tank.
In the step, the vacuum pump 180 needs to be opened, the air pressure of the first chamber 111 is pumped to 5-10 kPa, the air pressure is kept for 8-10 min, the pumped oil gas is sent to the lower part of the absorption section of the absorber 130, the temperature of the oil gas is high, the oil gas is firstly cooled by the absorbent sprayed from top to bottom, the oil gas is further fully absorbed by the cooled absorbent, and the residual unabsorbed oil gas is discharged from the top end of the absorber 130 and mixed with the oil gas to be processed to enter the system again.
Further, after 4-5 min, the purge valve 15 is opened, the hot air discharged by the refrigerator 130 is introduced into the first suction chamber 111 for purging, and the high-temperature gas can promote the desorption of the adsorbent, so that the adsorbent can desorb the oil gas more thoroughly.
Further, the vacuum pump 180, the vacuum valve 19 and the purge valve 15 are closed, the back pressure valve 13 is opened to be kept for 2-3 min, the states of other valves are unchanged, and the first chamber 111 is restored to the normal pressure. And after the second adsorber works for 15-20 min, opening the oil supply valve 17, the exhaust valve 11 and the air inlet valve 21 again, closing the exhaust valve 12, the back pressure valves 13 and 14, the purge valves 15 and 16, the oil supply valve 18, the vacuum valves 19 and 20 and the air inlet valve 22, and alternately using the first adsorber 110 and the second adsorber 120.
Fig. 3 shows a schematic structural diagram of an oil gas recovery system according to a second embodiment of the present invention.
The utility model discloses oil gas recovery system of second embodiment includes: the system comprises a first adsorber 210, a second adsorber 220, an absorber 230, a plurality of first heat exchangers 241, a plurality of second heat exchangers 242, a third heat exchanger 243, an external heat exchanger 244, a refrigerator 250, a gas collecting hood 260, an oil supply pump 271, an oil return pump 272, an induced draft fan 273, a vacuum pump 280, pipelines for connecting the structures and control valves on the pipelines.
In this embodiment, the control valve includes: exhaust valves 31, 32, back- pressure valves 33, 34, purge valves 35, 36, supply valves 37, 38, vacuum valves 39, 40, and intake valves 41, 42. The first adsorber 210 includes a first chamber 211 and a plurality of first support structures 212. The second adsorber 220 includes a second chamber 221 and a plurality of second support structures 222.
The structure and the working principle of the oil gas recovery system of the present embodiment are similar to those of the oil gas recovery system of the first embodiment, and are not repeated here. The difference from the first embodiment is that the present embodiment does not provide the first heat exchanger 241 under the bottom layer first support structure 212 inside the first chamber 211 and does not provide the second heat exchanger 242 under the bottom layer second support structure 222 inside the second chamber 221. Instead, an external heat exchanger 244 is disposed outside the first chamber 211 and the second chamber 221, and the external heat exchanger 244 is connected to the first chamber 211 and the second chamber 221, respectively.
In this embodiment, the oil and gas need to pass through the heat exchanger 244 before entering the first chamber 211 and the second chamber 221. The absorbent cooled in the refrigerator 250 passes through the external heat exchanger 244 and then is introduced into the first and second heat exchangers 241 and 242. In the external heat exchanger 244, the oil gas and the absorbent exchange heat to cool and then are sent into the first chamber 211 and the second chamber 221, so that the space between the first chamber 211 and the second chamber 221 can be saved, more layers of adsorbents can be arranged in the saved space, and meanwhile, the first heat exchanger and the second heat exchanger at the bottom layer in the first embodiment are combined into the external heat exchanger 244, so that the number of the heat exchangers is saved.
The utility model discloses oil gas recovery system has solved the high temperature problem that exists in "absorption + vacuum analysis + absorption" recovery oil gas technology, including three aspects problems such as oil gas high temperature, active carbon high temperature, absorbent high temperature. Compared with other schemes which only aim at a part of problems to be improved, the scheme can realize comprehensive temperature control only by cooling the absorbent.
In addition, this scheme can reduce the installed power of refrigerator at the heat exchanger that the refrigerator set up before the refrigerator, and the refrigerator that utilizes in this scheme adopts the forced air cooling mode, and the hot-blast quilt of emission is collected to utilize to improve at the analytic stage of sweeping in adsorber vacuum and understand the analysis effect.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In accordance with the embodiments of the present invention as set forth above, these embodiments are not exhaustive and do not limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention and its various embodiments with various modifications as are suited to the particular use contemplated. The present invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. An oil and gas recovery system, comprising:
the first adsorber and the second adsorber are used for adsorbing oil gas by adopting an adsorbent;
the absorber is respectively connected with the first absorber and the second absorber and is used for absorbing the oil gas absorbed by the first absorber and the second absorber by adopting an absorbent;
a refrigerator for cooling the absorbent;
the first heat exchanger is positioned in the first absorber, is respectively connected with the refrigerator and the absorber, and is used for exchanging the heat of the cooled absorbent and the oil gas; and
the second heat exchanger is positioned in the second adsorber, is respectively connected with the refrigerator and the absorber and is used for exchanging the heat of the cooled absorbent and the oil gas,
when the first adsorber adsorbs the hydrocarbon, the absorber absorbs the hydrocarbon adsorbed by the second adsorber, and the cooled absorbent enters the absorber through the first heat exchanger,
when the second adsorber adsorbs the oil gas, the absorber absorbs the oil gas adsorbed by the first adsorber, and the cooled absorbent enters the absorber through the second heat exchanger.
2. The oil and gas recovery system of claim 1, wherein the first adsorber comprises: a first chamber; the first heat exchangers are distributed along the longitudinal direction of the first chamber and used for bearing the adsorbent, and the number of the first heat exchangers is multiple and is alternately distributed with the plurality of first support structures;
the second adsorber includes: a second chamber; and a plurality of second support structures located in the second chamber, distributed along the longitudinal direction of the second chamber, and used for carrying the adsorbent, wherein the number of the second heat exchangers is a plurality, and the second heat exchangers are alternately distributed with the plurality of second support structures,
wherein the oil gas enters from the lower part of the first chamber and the second chamber.
3. The oil and gas recovery system of claim 2, wherein the number of first heat exchangers located below the first support structure at the bottom is greater than the number of first heat exchangers between the plurality of first support structures;
the number of second heat exchangers located below the second support structure at the bottom is greater than the number of second heat exchangers between the plurality of second support structures.
4. The oil and gas recovery system of claim 3, wherein a plurality of the first heat exchangers are connected in series, the first heat exchanger at the bottom being connected to the chiller, the first heat exchanger at the top being connected to the absorber;
a plurality of the second heat exchangers are connected in series, the second heat exchanger positioned at the bottom is connected with the refrigerator, the second heat exchanger positioned at the top is connected with the absorber,
the serial positions of the first heat exchangers and the second heat exchangers are respectively positioned in the first chamber and the second chamber.
5. The oil and gas recovery system of claim 2, further comprising an external heat exchanger connected to the first chamber and the second chamber, respectively,
the first heat exchanger and the second heat exchanger are respectively connected with the refrigerator through the external heat exchanger.
6. The oil and gas recovery system of claim 1, further comprising a third heat exchanger coupled to the absorber and the refrigerator, respectively,
wherein the absorbent to be cooled is primarily heat exchanged with the absorbent discharged from the absorber through the third heat exchanger before the absorbent is cooled by the refrigerator.
7. The vapor recovery system of claim 2, wherein the refrigerator cools the absorbent using air cooling, the vapor recovery system further comprising:
the gas collecting hood is positioned above the refrigerator and used for collecting hot air generated by the refrigerator;
the first sweeping valve is respectively connected with the gas collecting hood and the first cavity; and
a second purge valve respectively connected with the gas-collecting hood and the second chamber,
wherein the first purge valve is used to introduce the hot air into the first chamber when the absorber absorbs the hydrocarbons adsorbed by the first adsorber,
when the absorber absorbs the oil gas absorbed by the second absorber, the second purging valve is used for introducing the hot air into the second cavity.
8. The oil and gas recovery system of any of claims 1-7, wherein the first heat exchanger and the second heat exchanger are finned heat exchangers.
9. The oil and gas recovery system of any of claims 1-7, wherein the adsorbent comprises one or a combination of activated carbon, silica gel, and molecular sieves.
10. The oil and gas recovery system according to any of claims 1-7, wherein the temperature range of the absorbent output by the refrigerator comprises 10-15 ℃ and the temperature range of the absorbent output by the first heat exchanger or the second heat exchanger comprises 15-25 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921825552.0U CN211585902U (en) | 2019-10-28 | 2019-10-28 | Oil gas recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921825552.0U CN211585902U (en) | 2019-10-28 | 2019-10-28 | Oil gas recovery system |
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| CN211585902U true CN211585902U (en) | 2020-09-29 |
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