CN111495109A - Oil gas recovery system - Google Patents
Oil gas recovery system Download PDFInfo
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- CN111495109A CN111495109A CN202010349283.6A CN202010349283A CN111495109A CN 111495109 A CN111495109 A CN 111495109A CN 202010349283 A CN202010349283 A CN 202010349283A CN 111495109 A CN111495109 A CN 111495109A
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- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 238000001179 sorption measurement Methods 0.000 claims abstract description 87
- 238000003860 storage Methods 0.000 claims abstract description 24
- 238000005057 refrigeration Methods 0.000 claims abstract description 18
- 238000000926 separation method Methods 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 100
- 239000007788 liquid Substances 0.000 claims description 47
- 238000007789 sealing Methods 0.000 claims description 17
- 239000012528 membrane Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 108
- 239000007789 gas Substances 0.000 description 81
- 239000000047 product Substances 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 6
- 230000008929 regeneration Effects 0.000 description 5
- 238000011069 regeneration method Methods 0.000 description 5
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000341 volatile oil Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- -1 and meanwhile Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an oil gas recovery system which comprises an oil gas pipe, an oil storage tank, a refrigerating device, a vacuum pump and an adsorption device, wherein the oil gas pipe penetrates through a heat exchange box and then is communicated with the oil storage tank, a refrigerating sheet is arranged in the heat exchange box and is connected with the refrigerating device, an exhaust pipe is obliquely arranged between a disc type heat exchanger and the oil storage tank, the higher end of the exhaust pipe is connected with the adsorption device through the vacuum pump, the adsorption device comprises two adsorption tanks which are connected with the exhaust pipe in parallel, oil return pipes communicated with the oil storage tank are arranged at the bottoms of the two adsorption tanks, an emptying pipe is arranged at the top of each adsorption tank, and a heat exchange pipeline arranged in the oil storage tank is further arranged on. The invention processes the adsorption device through partial cold source and partial heat source of the refrigeration device, thereby improving the utilization rate of cold energy and reducing the production cost of oil-gas separation.
Description
Technical Field
The invention relates to the field of oil gas recovery, in particular to an oil gas recovery system.
Background
The oil gas recovery means that volatile oil gas is collected in the processes of oil product production, transportation, loading and unloading and vehicle oiling, and then is converted into liquid oil product again through absorption, adsorption, condensation and other related technical means, so as to achieve the purposes of environmental protection and recycling.
At present, oil-gas separation is technically divided into an absorption method, a condensation method, an adsorption method and a membrane separation method, wherein the absorption method is gradually eliminated due to high exhaust emission concentration; membrane separation processes are limited by the lack of mature, stable membrane products suitable for oil and gas recovery; the investment of the adsorption method and the condensation method is basically equivalent, however, the condensation method has higher energy consumption and higher operating cost than the adsorption method, so the adsorption method is adopted in most of oil gas recovery processes at present, however, the adsorption method usually adopts a primary adsorption device and two activated carbon tanks to alternately adsorb to complete the adsorption of oil gas, and the concentration value of an oil gas discharge port is still not ideal.
In view of the above, there is an urgent need for an oil-gas separation system with low recovery cost.
Disclosure of Invention
The invention aims to provide an oil gas recovery system with low production cost.
The purpose of the invention is realized by the following technical scheme:
the utility model provides an oil gas recovery system, includes oil gas pipe, oil storage tank, refrigerating plant, vacuum pump and adsorption equipment, the oil gas pipe passes behind the heat transfer case and communicates with the oil storage tank, installs the refrigeration piece in the heat transfer case, the refrigeration piece is connected with refrigerating plant, still install the blast pipe in the slope between disc heat exchanger and the oil storage tank, the higher one end of blast pipe passes through the vacuum pump and is connected with adsorption equipment, adsorption equipment includes two adsorption tanks parallelly connected with the blast pipe, and two adsorption tank bottoms portion are equipped with the time oil pipe that returns with the oil storage tank intercommunication, and the blow-down pipe is installed at the adsorption tank top, still be equipped with the heat transfer pipeline of arranging in the oil storage tank on the.
The refrigeration piece has the polylith, and every refrigeration piece all installs the cold liquid pipe, installs the flange that admits air after the one end of many cold liquid pipes is parallelly connected, installs the exhaust flange after the other end of many cold liquid pipes is parallelly connected.
The refrigerating device comprises a compressor, a condenser, an expansion valve and a refrigerating sheet, wherein the compressor is connected with the condenser through a high-pressure pipe, the condenser is connected with the expansion valve through a cold liquid pipe, an outlet of the expansion valve is communicated with an air inlet flange, an air outlet flange is communicated with an inlet of the compressor, and cooling media are added into the high-pressure pipe and the cold liquid pipe.
Every adsorption tank in all install heat transfer pipeline, the three-way valve of taking the valve is all installed at every heat transfer pipeline's both ends, two openings that are located heat transfer pipeline entrance point three-way valve communicate with the import of condenser and the export of expansion valve respectively, two openings that are located heat transfer pipeline exit end three-way valve communicate with the import of condenser export and compressor respectively.
The adsorption tank comprises a tank body, a sleeve and an activated carbon layer, the sleeve is mounted on the inner top surface of the tank body, the activated carbon layer is mounted in the sleeve and horizontally arranged in multiple layers, the sleeve comprises an outer wall and an inner wall, the outer wall and the inner wall are enclosed into a hollow sealed cavity, steps are processed on the inner wall, the diameters of the steps are gradually reduced from bottom to top, the activated carbon layer with the diameter matched with the steps is mounted on each step, the activated carbon layer comprises a support ring, a filter screen mounted on the inner wall at the bottom of the support ring and a cover plate mounted on the top surface of the support ring, activated carbon is filled between the cover plate and the filter screen, a plurality of air holes are processed on the cover plate, a convex edge is mounted on each air hole, a baffle cap coaxial with the air holes is mounted above the convex edge, the diameter of the baffle cap is larger than that of the air, the through hole is internally provided with a one-way valve which enables the recovered oil to flow into the sealing cavity, and the sealing cavity is internally provided with a liquid drainage device.
And a layer of heat insulation plate is arranged on the inner wall of the sealing cavity.
Drain includes snakelike return bend, stifled ball and soft spring, snakelike return bend and sealed chamber bottom intercommunication, the liquid outlet that the opening is down is installed to the snakelike return bend other end, is equipped with stifled ball in the liquid outlet, the inner wall laminating of stifled ball through soft spring and liquid outlet.
The heat transfer pipeline is around putting in sleeve outer wall and activated carbon layer bottom, every the activated carbon in situ all install the fixed pipe of detachable, the fixed pipe on adjacent activated carbon layer passes through the resistance to compression hose connection, fixed pipe both ends and heat transfer pipeline intercommunication.
And the top of the sleeve is provided with a layer of separation membrane.
And the emptying pipe is connected with an ignition device.
The oil gas recovery system provided by the invention has the beneficial effects that:
(1) the oil gas pipe is provided with the heat exchange box, so that oil gas in the oil gas pipe can be cooled, part of oil gas is condensed into liquid oil, the rest oil gas is pumped into the adsorption device through the vacuum pump for adsorption, the oil gas can be recycled for the second time, the loss of the oil gas is reduced, meanwhile, the adsorption device is treated by part of cold sources and part of heat sources of the refrigeration device, the utilization rate of cold energy can be improved, and the production cost of oil gas separation is reduced;
(2) the cooling liquid pipe is arranged on the refrigerating sheet, so that the refrigerating device can utilize the cold energy generated by the refrigerating device to cool, all the cold energy provided by the refrigerating sheet is cold source, and the problem that the semiconductor refrigerating sheet can generate heat on the other surface during refrigeration in the prior art is solved;
(3) the refrigeration sheets are connected in parallel and then are installed at the evaporation end of the refrigeration device, so that the refrigeration capacity of the refrigeration device can be directly concentrated on the heat exchange box, and the cooling efficiency of oil gas is improved;
(4) the adsorption tank is internally provided with the heat exchange pipeline which is communicated with the hot end and the cold end of the refrigerating device through the three-way valve, so that the adsorption tank can be assisted by cold energy generated during the working of the refrigerating device to improve the flocculation efficiency of the liquid oil product, and meanwhile, oil and gas attached to the active carbon can be separated through heat generated in the refrigerating process of the refrigerating device, so that the service life of the active carbon is prolonged;
(5) the sleeve and the activated carbon layer are arranged in the adsorption tank, so that the oil gas can enter the adsorption tank and then go down along the outer wall of the sleeve, and sequentially pass through the activated carbon layer from bottom to bottom, the advancing distance of the oil gas is increased, the moving space of the oil gas is increased, and the preparation efficiency of the liquid oil product can be improved in the filtering process of the oil gas;
(6) the sleeve is provided with the hollow sealing cavity for discharging liquid product oil, so that the liquid oil adsorbed on the upper activated carbon layer is prevented from dropping on the lower activated carbon layer, and the adsorption efficiency of the activated carbon is ensured;
(7) the heat insulation plate is arranged in the sealing cavity, so that the influence of a cold source or a heat source in the heat exchange pipeline outside the sealing cavity on liquid oil in the sealing cavity can be reduced;
(8) by arranging the liquid drainage device, oil gas in the adsorption tank can be prevented from entering the sealing cavity from the bottom, so that the oil gas is prevented from leaking, and the adsorption efficiency of the adsorption tank is ensured;
(9) the heat exchange pipeline is wound on the outer wall of the sleeve, so that the contact area of the oil gas and a cold source after the oil gas enters the adsorption tank can be increased, and the adsorption efficiency of the adsorption tank is ensured;
(10) the separation membrane is arranged at the top of the sleeve, so that oil gas in the sealing cavity can be prevented from flowing out of the adsorption tank, the waste of the oil gas is further reduced, and meanwhile, the production cost cannot be increased due to the fact that only one separation membrane is used;
(11) the ignition device is connected to the top of the adsorption tank, so that the separated waste gas in the oil gas can be ignited, and the waste gas is changed into carbon dioxide and other impurities, thereby reducing air pollution.
Drawings
Fig. 1 is a schematic structural diagram provided in an embodiment of the present invention.
Fig. 2 is a schematic connection diagram of a refrigeration device according to an embodiment of the present invention.
Fig. 3 is a schematic view of an internal structure of an adsorption tank according to an embodiment of the present invention.
Fig. 4 is a schematic view of an internal structure of a sleeve according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of an activated carbon layer according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a sleeve according to an embodiment of the present invention.
Fig. 7 is a schematic structural view of a liquid discharge apparatus provided in an embodiment of the present invention.
Reference numerals: 1. an oil and gas pipe; 2. an oil storage tank; 3. a refrigeration device; 31. a compressor; 32. a condenser; 33. an expansion valve; 34. a refrigeration plate; 35. a cold liquid pipe; 36. an air inlet flange; 37. an exhaust flange; 38. a high pressure pipe; 4. a vacuum pump; 5. an adsorption device; 51. an adsorption tank; 52. a tank body; 53. a sleeve; 531. an outer wall; 532. an inner wall; 533. sealing the cavity; 534. a step; 535. a one-way valve; 536. a heat insulation plate; 54. an activated carbon layer; 541. a support ring; 542. filtering with a screen; 543. a cover plate; 544. air holes are formed; 545. a convex edge; 546. a gear cap; 547. a through hole; 548. a fixed tube; 55. an oil return pipe; 56. an emptying pipe; 57. a heat exchange conduit; 58. a three-way valve; 59. a vacuum generator; 6. a heat exchange box; 7. an exhaust pipe; 9. a liquid discharge device; 91. a snake-shaped bent pipe; 92. blocking the ball; 93. a soft spring; 94. a liquid outlet; 10. a compression-resistant hose; 11. a separation membrane; 12. an ignition device.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
The terms "substantially", "essentially", and the like are intended to indicate that the relative terms are not required to be absolutely exact, but may have some deviation. For example, "substantially parallel" does not merely mean absolute parallelism, and there is generally a certain deviation because absolute parallelism is difficult to achieve in actual production and operation. Therefore, "substantially parallel" includes the case where there is a certain deviation as described above, in addition to the absolute parallel.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Examples
As shown in fig. 1-7, the oil gas recovery system that this embodiment provided includes oil gas pipe 1, oil storage tank 2, refrigerating plant 3, vacuum pump 4 and adsorption equipment 5, oil gas pipe 1 communicates with oil storage tank 2 after passing heat transfer case 6, and oil gas pipe 1 in the heat transfer case 6 is the heliciform setting, installs chilling plate 34 in the heat transfer case 6, chilling plate 34 has the polylith, and cold liquid pipe 35 is all installed to every chilling plate 34, installs inlet flange 36 after the one end of many cold liquid pipes 35 is parallelly connected, installs exhaust flange 37 after the other end of many cold liquid pipes 35 is parallelly connected, refrigerating plant 3 includes compressor 31, condenser 32, expansion valve 33 and chilling plate 34, compressor 31 passes through high-pressure tube 38 and is connected with condenser 32, and condenser 32 passes through cold liquid pipe 35 and is connected with expansion valve 33, and inlet flange 36 intercommunication are gone out of expansion valve 33, and the inlet flange 37 of exhaust flange and compressor 31 communicates, cooling medium is added into the high-pressure pipe 38 and the cold liquid pipe 35. An exhaust pipe 7 is obliquely arranged between the disc heat exchanger 6 and the oil storage tank 2, the higher end of the exhaust pipe 7 is connected with an adsorption device 5 through a vacuum pump 4, the exhaust pipe 7 which is obliquely arranged can prevent oil which is condensed into liquid in the oil-gas pipe 1 from entering the adsorption device 5, the adsorption device 5 comprises two adsorption tanks 51 which are connected with the exhaust pipe 7 in parallel, when the two adsorption tanks 51 are adsorbed by one tank, the other tank is regenerated to ensure the continuous operation of the adsorption device 5, if the recovery amount of the treated oil gas is large, more adsorption tanks 51 can be adopted, oil return pipes 55 communicated with the oil storage tank 2 are arranged at the bottoms of the two adsorption tanks 51, a vacuum generator 59 with adjustable output direction is also connected between the two adsorption tanks 51, and the vacuum generator 59 is used for pumping the oil gas in the adsorption tanks in the regeneration state into the adsorption tanks 51 which are carrying out adsorption operation, an emptying pipe 56 is arranged at the top of the adsorption tank 51, and a heat exchange pipeline 57 arranged in the oil storage tank 2 is further arranged on the refrigerating device 3.
As shown in fig. 3 to 6, each of the adsorption tanks 51 is internally provided with a heat exchange pipeline 57, two ends of each heat exchange pipeline 57 are respectively provided with a three-way valve 58 with a valve, two ports of the three-way valve 58 at the inlet end of the heat exchange pipeline 57 are respectively communicated with the inlet of the condenser 32 and the outlet of the expansion valve 33, two ports of the three-way valve 58 at the outlet end of the heat exchange pipeline 57 are respectively communicated with the outlet of the condenser 32 and the inlet of the compressor 31, and whether the cold source or the heat source enters the adsorption tank 51 can be conveniently controlled by using the three-way valve 58 with a valve.
The adsorption tank 51 comprises a tank body 52, a sleeve 53 and an activated carbon layer 54, the sleeve 53 is mounted on the inner top surface of the tank body 52, the activated carbon layer 54 with multiple layers arranged horizontally is mounted in the sleeve 53, the outlet of the vacuum pump 4 is connected to the side wall of the upper part of the tank body 52 through a pipeline, a layer of separation membrane 11 is mounted at the top of the sleeve 53, the sleeve 53 comprises an outer wall 531 and an inner wall 532, the outer wall 531 and the inner wall 532 enclose a hollow sealed cavity 533, a layer of heat insulation plate 536 is mounted on the inner wall 532 of the sealed cavity 533, the temperature in the adsorption tank 51 can be prevented from being transmitted into the sealed cavity 533 through the heat insulation plate 536 to ensure the constant temperature of the sealed cavity 533, steps 534 are processed on the inner wall 532, the diameter of the steps 534 is gradually reduced from bottom to top, the activated carbon layer 54 with the matched diameter is mounted on each step 534, the activated carbon layer 54 comprises a support ring 541, activated carbon is filled between the cover plate 543 and the filter screen 542, a plurality of air holes 544 are processed on the cover plate 543, a convex edge 545 is installed on each air hole 544, a blocking cap 546 coaxial with the air holes 544 is installed above the convex edge 545, the diameter of the blocking cap 546 is larger than that of the air holes 544, a through hole 547 communicated with the sealing cavity 533 is processed on the inner wall 532 above the activated carbon layer 54, a one-way valve 535 enabling recovered oil to flow into the sealing cavity 533 is installed in the through hole 547, oil gas in the sealing cavity 533 can be prevented from flowing out from the through hole 547 at a high position by arranging the one-way valve 535, and a liquid drainage device 9 is arranged in the sealing cavity 533.
As shown in fig. 7, the liquid draining device 9 includes a serpentine elbow 91, a ball stopper 92 and a soft spring 93, the serpentine elbow 91 is communicated with the bottom of the sealed cavity 533, the serpentine elbow is vertically complete, a liquid outlet 94 with a downward opening is installed at the other end of the serpentine elbow, the ball stopper 92 is arranged in the liquid outlet 94, the ball stopper 92 is attached to the inner wall 532 of the liquid outlet 94 through the soft spring 93, through the serpentine elbow, a plurality of sealed channels can be formed, so that oil gas in the adsorption tank 51 can be prevented from directly entering the sealed cavity 533 through the serpentine elbow 91, and meanwhile, through the ball stopper 92 arranged on the liquid outlet 94, high-pressure oil gas sent into the adsorption tank 51 by the vacuum pump 4 can be prevented from being squeezed into the sealed cavity 533, so that the adsorption efficiency of the adsorption tank 51.
The air release pipe 56 is connected with the ignition device 12, so that a small part of oil gas capable of being adsorbed and a part of combustible gas can be ignited to generate carbon dioxide, and the environment pollution caused by the air release gas can be avoided.
The using method of the invention is as follows:
when the oil tank truck unloads oil, gas (mainly referring to volatile matters of volatile oil such as gasoline, stable light hydrocarbon and the like) of an underground oil outlet pipe is introduced into the oil-gas pipe 1 and flows along the oil-gas pipe 1, at the moment, the refrigerating device 3 and the vacuum pump 4 work, the vacuum pump 4 works to enable the oil-gas pipe 1 to form negative pressure, oil gas is sucked, meanwhile, the refrigerating device 3 works, a cold source generated when the refrigerating device 3 works is transmitted to the heat exchange box 6 through the refrigerating sheet 34, the temperature in the heat exchange box 6 is extremely low at the moment, oil gas in the oil-gas pipe 1 is cooled, the oil gas is cooled through the refrigerating sheet 34 when passing through the heat exchange box 6 and is used for replacing heat in the oil gas, as the oil-gas pipe 1 is coiled in the heat exchange box 6, the oil gas is gradually subjected to spiral heat exchange when being cooled, the contact area and the contact time of the oil-gas pipe 1 and the heat, the oil product which is changed into liquid state directly flows into the oil storage tank 2, the cooled and unliquefied oil gas enters the upper part of the oil storage tank 2 under the action of the vacuum pump 4, at the moment, the heat exchange pipeline 57 in the oil storage tank 2 is communicated with part of cold sources of the refrigerating device 3 and is used for reducing the temperature in the adsorption tank 51, simultaneously, under the action of the vacuum pump 4, a low-temperature and high-pressure environment is formed in the adsorption tank 51 and is used for accelerating the liquefaction of the oil gas, the liquefied oil product is accumulated at the bottom of the adsorption tank 51, at the moment, a small part of the unadsorbed oil gas flows from the activated carbon in the sleeve 53 from bottom to top and flows to the upper activated carbon layer 54 from the air vent 544 of the activated carbon layer 54, the activated carbon in the activated carbon layer 54 adsorbs the oil gas so as to reduce the oil gas content in the air, because the fixed pipe 548 of the activated carbon layer 54 is communicated, part of the oil gas is still condensed into liquid and drops on the cover plate 543 and the blocking cap 546 below, the blocking cap 546 can prevent the liquid oil from entering the activated carbon at the lower layer, so as to avoid the adsorption of the activated carbon, the liquid oil drops on the cover plate 543 and then enters the sealed cavity 533 from the through hole 547 at one side of the cover plate 543 and deposits at the bottom of the sealed cavity 533, when the oil amount in the sealed cavity 533 is large, the gravity of the liquid oil is greater than the pulling force of the soft spring 93 and the pressure in the adsorption, the blocking ball 92 is pushed out, then the liquid oil in the sealed cavity 533 flows out, when the oil amount in the sealed cavity 533 is small, the soft spring 93 pulls back the blocking ball 92, the oil gas which does not pass through the activated carbon layer 54 can be prevented from entering the sealed cavity 533 through the snake-shaped elbow 91, so as to ensure the adsorption effect of the oil gas, finally, the oil gas containing a small amount of oil gas passes through the separation membrane 11 and flows to the ignition device, the ignitor 12 ignites the escaping oil and gas to form carbon dioxide, water, and a minimal portion of exhaust to reduce air pollution.
When the adsorption tanks 51 are regenerated, the heat exchange pipeline 57 is communicated with the heat source of the refrigerating device 3, at the moment, part of the heat source enters the activated carbon layer 54, the activated carbon layer 54 is heated, the oil gas ions attached to the activated carbon are separated, meanwhile, the oil gas in the regeneration tank (the adsorption tank 51 which does not participate in the adsorption operation) is pumped to the adsorption tanks 51 by the vacuum generator 59 between the two adsorption tanks 51, the pressure in the adsorption tanks 51 which do not perform the adsorption operation is reduced, the oil gas desorption on the activated carbon is accelerated, and the regeneration efficiency is improved.
The invention greatly reduces the emission of oil gas after multiple processing, and meanwhile, the operation of the whole set of equipment can be completed only by the refrigerating capacity used by a single station, thereby saving the production cost.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be covered within the scope of the present invention. It should be noted that structures or components illustrated in the drawings are not necessarily drawn to scale, and descriptions of well-known components and processing techniques and procedures are omitted to avoid unnecessarily limiting the invention.
Claims (10)
1. An oil gas recovery system which characterized in that: including oil gas pipe, oil storage tank, refrigerating plant, vacuum pump and adsorption equipment, the oil gas pipe passes behind the heat transfer case and communicates with the oil storage tank, installs the refrigeration piece in the heat transfer incasement, the refrigeration piece is connected with refrigerating plant, still install the blast pipe in the slope between disc heat exchanger and the oil storage tank, the higher one end of blast pipe is passed through the vacuum pump and is connected with adsorption equipment, adsorption equipment includes two adsorption tanks parallelly connected with the blast pipe, and two adsorption tank bottoms portion are equipped with the time oil pipe that returns with the oil storage tank intercommunication, and the blow-down pipe is installed at the adsorption tank top, still be equipped with the heat transfer pipeline of arranging in the oil storage tank on the refrigerating plant.
2. The oil and gas recovery system of claim 1, wherein: the refrigeration piece has the polylith, and every refrigeration piece all installs the cold liquid pipe, installs the flange that admits air after the one end of many cold liquid pipes is parallelly connected, installs the exhaust flange after the other end of many cold liquid pipes is parallelly connected.
3. The oil and gas recovery system of claim 2, wherein: the refrigerating device comprises a compressor, a condenser, an expansion valve and a refrigerating sheet, wherein the compressor is connected with the condenser through a high-pressure pipe, the condenser is connected with the expansion valve through a cold liquid pipe, an outlet of the expansion valve is communicated with an air inlet flange, an air outlet flange is communicated with an inlet of the compressor, and cooling media are added into the high-pressure pipe and the cold liquid pipe.
4. The oil and gas recovery system of claim 3, wherein: every adsorption tank in all install heat transfer pipeline, the three-way valve of taking the valve is all installed at every heat transfer pipeline's both ends, two openings that are located heat transfer pipeline entrance point three-way valve communicate with the import of condenser and the export of expansion valve respectively, two openings that are located heat transfer pipeline exit end three-way valve communicate with the import of condenser export and compressor respectively.
5. The oil and gas recovery system of claim 1, wherein: the adsorption tank comprises a tank body, a sleeve and an activated carbon layer, the sleeve is mounted on the inner top surface of the tank body, the activated carbon layer is mounted in the sleeve and horizontally arranged in multiple layers, the sleeve comprises an outer wall and an inner wall, the outer wall and the inner wall are enclosed into a hollow sealed cavity, steps are processed on the inner wall, the diameters of the steps are gradually reduced from bottom to top, the activated carbon layer with the diameter matched with the steps is mounted on each step, the activated carbon layer comprises a support ring, a filter screen mounted on the inner wall at the bottom of the support ring and a cover plate mounted on the top surface of the support ring, activated carbon is filled between the cover plate and the filter screen, a plurality of air holes are processed on the cover plate, a convex edge is mounted on each air hole, a baffle cap coaxial with the air holes is mounted above the convex edge, the diameter of the baffle cap is larger than that of the air, the through hole is internally provided with a one-way valve which enables the recovered oil to flow into the sealing cavity, and the sealing cavity is internally provided with a liquid drainage device.
6. The oil and gas recovery system of claim 5, wherein: and a layer of heat insulation plate is arranged on the inner wall of the sealing cavity.
7. The oil and gas recovery system of claim 5, wherein: drain includes snakelike return bend, stifled ball and soft spring, snakelike return bend and sealed chamber bottom intercommunication, the liquid outlet that the opening is down is installed to the snakelike return bend other end, is equipped with stifled ball in the liquid outlet, the inner wall laminating of stifled ball through soft spring and liquid outlet.
8. The oil and gas recovery system of claim 5, wherein: the heat transfer pipeline is around putting in sleeve outer wall and activated carbon layer bottom, every the activated carbon in situ all install the fixed pipe of detachable, the fixed pipe on adjacent activated carbon layer passes through the resistance to compression hose connection, fixed pipe both ends and heat transfer pipeline intercommunication.
9. The oil and gas recovery system of claim 1, wherein: and the top of the sleeve is provided with a layer of separation membrane.
10. The oil and gas recovery system of claim 1, wherein: and the emptying pipe is connected with an ignition device.
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| CN111495109B (en) | 2022-04-12 |
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