CN112892156A - Method for recovering and purifying waste gas in crude benzene hydrofining production - Google Patents
Method for recovering and purifying waste gas in crude benzene hydrofining production Download PDFInfo
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- CN112892156A CN112892156A CN202110059581.6A CN202110059581A CN112892156A CN 112892156 A CN112892156 A CN 112892156A CN 202110059581 A CN202110059581 A CN 202110059581A CN 112892156 A CN112892156 A CN 112892156A
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- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 239000002912 waste gas Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 239000003921 oil Substances 0.000 claims abstract description 141
- 238000000746 purification Methods 0.000 claims abstract description 54
- 229920000642 polymer Polymers 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000007921 spray Substances 0.000 claims abstract description 8
- 239000010724 circulating oil Substances 0.000 claims abstract description 7
- 238000005406 washing Methods 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 10
- 238000007667 floating Methods 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009423 ventilation Methods 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
- 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
- B01D53/14—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 absorption
- B01D53/1487—Removing organic compounds
-
- 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
-
- 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
- B01D53/14—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 absorption
- B01D53/1418—Recovery of products
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a waste gas recovery and purification method in crude benzene hydrofining production, which comprises a purification tower and a circulating wash oil tank, wherein an inclined plate is arranged at the bottom of the inner wall of the purification tower, the inclined angle of the inclined plate is more than ten degrees, a communicating pipe is fixedly connected to the position of the outer part of the purification tower, which is opposite to the bottom of the inclined plate, the communicating pipe is communicated with the inner part of the purification tower, one end of the communicating pipe, which is far away from the purification tower, is fixedly connected with the top of one side of a circulating wash oil tank, a switch which can be opened along with the descending of an oil surface is arranged in the circulating oil tank of the purification method, a wafer polymer filter plate in the purification tower is inclined, and after wash oil is sprayed by a wash oil spray head, the wash oil can descend along the inclined; the air outlet pipe at the top of the purification tower is provided with a push-pull groove capable of being pulled, and the push-pull groove can be replaced by a push-pull groove, so that the activated carbon is always adsorbed in the pipeline of the air outlet pipe, and the air outlet pipe does not need to be stopped and replaced.
Description
The technical field is as follows:
the invention belongs to the technical field of gas purification equipment, and particularly relates to a method for recovering and purifying waste gas in crude benzene hydrofining production.
Background art:
during the crude benzene hydrofining process of coking production, a large amount of waste gases such as the decomposed gas and the diffused gas are generated, if the waste gases are directly discharged into the air, serious air pollution is caused, and land and water resources are influenced.
In the prior art, during crude benzene purification, most of the crude benzene is adsorbed by activated carbon and the like, the crude benzene is washed clean by wash oil, the wash oil can be recycled, and when the crude benzene purification device is just started, the inside of a circulating oil tank can be temporarily pumped away without circular entering, so that the oil level inside the circulating oil tank is greatly reduced, and the normal pumping of the wash oil is influenced.
The invention content is as follows:
the invention aims to solve the problems and provide a method for recovering and purifying waste gas in the crude benzene hydrofining production, wherein a switch which can be opened along with the descending of an oil level is arranged in a circulating oil tank of the purifying method, when the liquid level of washing oil descends too much, a floating ball drives an extrusion plate to descend, the switch is opened in a touch manner, and new oil is introduced from the interior of a new oil tank, so that the washing oil is always washed in a purifying tower; the wafer polymer filter plate inside the purification tower is inclined, and after the washing oil is sprayed out by the washing oil spray head, the washing oil can downwards flow along the inclined wafer polymer filter plate, so that the effect of comprehensively washing the wafer polymer filter plate is achieved; the air outlet pipe at the top of the purification tower is provided with a push-pull groove capable of being pulled, and the push-pull groove can be replaced by a push-pull groove, so that the activated carbon is always adsorbed in the pipeline of the air outlet pipe, and the air outlet pipe does not need to be stopped and replaced.
In order to solve the problems, the invention provides a technical scheme of a waste gas recovery and purification method in the crude benzene hydrofining production, which comprises the following steps:
a waste gas recovery and purification method in crude benzene hydrofining production comprises a purification tower and a circulating wash oil tank, wherein an inclined plate is arranged at the bottom of the inner wall of the purification tower, the inclination angle of the inclined plate is larger than ten degrees, a communicating pipe is fixedly connected to the position of the outer part of the purification tower relative to the bottom of the inclined plate and is communicated with the inner part of the purification tower, one end of the communicating pipe, which is far away from the purification tower, is fixedly connected with the top of one side of the circulating wash oil tank, the communicating pipe is communicated with the inner part of the circulating wash oil tank, an oil pump is fixedly connected to the top of the circulating wash oil tank, the input end of the oil pump extends to the bottom of the inner wall of the circulating wash oil tank, a new oil tank is arranged at the top of the circulating wash oil tank, a discharge pipe of the new oil tank is communicated with the inner part of the circulating wash oil tank, the purifying tower is characterized in that two first slots are fixedly connected to the middle of the inner wall of the purifying tower, a wafer polymer filter plate is inserted between the first slots, the wafer polymer filter plate is inclined for thirty degrees, an air outlet pipe is arranged at the top of the purifying tower, and a push-pull groove is movably connected to the inner part of the air outlet pipe.
As a preferred technical scheme, the top of the floating ball is fixedly connected with a connecting rod, the top of the connecting rod is fixedly connected with an extrusion plate, the inner wall of the middle of the sliding pipe is fixedly connected with a limiting ring, the connecting rod is connected with the limiting ring in a sliding mode, the top of the limiting ring is fixedly connected with a switch, and the switch is electrically connected with an oil pump and an electromagnetic valve of a new oil tank discharging pipe.
According to a preferred technical scheme, an air inlet pipe is fixedly connected to the side wall of the purification tower and located below a wafer polymer filter plate, the air inlet pipe is communicated with the interior of the purification tower, a second communicating pipe is fixedly connected to the output end of the oil pump, one end, away from the oil pump, of the second communicating pipe extends to the interior of the purification tower and is fixedly connected with an oil washing spray head, and the oil washing spray head is located above the wafer polymer filter plate.
As a preferred technical scheme of the invention, the air outlet pipe is a square pipe, two opposite slots are arranged on two sides of the air outlet pipe, the push-pull slot is inserted into the second slot, and the length of the push-pull slot is twice of the width of the air outlet pipe.
According to a preferable technical scheme of the invention, the middle part of the push-pull groove is fixedly connected with a baffle, the bottom of the push-pull groove is provided with ventilating grooves at two sides of the baffle, the insides of the ventilating grooves are fixedly connected with a blocking net, and activated carbon is accumulated in the push-pull groove and at the top of the blocking net.
As a preferable technical scheme of the invention, the top of the second slot is fixedly connected with a sealing gasket, and the bottom of the sealing gasket is contacted with the top of the push-pull slot and a baffle in the middle of the push-pull slot.
As a preferable technical solution of the present invention, the inner wall of the circulating wash oil tank is fixedly connected with a cooling plate.
Preferably, the method for recovering and purifying the waste gas comprises the following specific steps:
t1, the inside of purifying column is introduced through the intake pipe to the waste gas of retrieving, because the density of benzene is less than the density of air, upwards behind the waste gas entering purifying column, when the wafer polymer filter, keep apart most benzene molecules in with the air through the filter, open the oil pump, the oil pump sprays on the wafer polymer filter after getting into the purifying column through No. two communicating pipes with the washing oil shower nozzle with circulation washing oil in the oil tank, takes away the benzene on the wafer polymer filter.
T2, the wash oil after spraying falls in the bottom of purifying tower, enter the circulation wash oil case along swash plate and a communicating pipe, because the density of benzene is less than the density of wash oil, benzene can float on the oil level, because the continuous suction wash oil from circulation wash oil incasement of oil pump, when the oil level descends too much the top that promotes the wafer polymer filter with benzene absorption easily, therefore, set up the floater, when the inside oil mass of circulation wash oil incasement is less, the floater drives the stripper plate and descends, after the switch contacted with the stripper plate, the oil pump was closed, the solenoid valve of new oil case was opened, new oil gets into in the circulation wash oil case.
T3, simultaneously with T2, the gas after the filtration upwards outwards discharges through the outlet duct, and during the discharge, gas is further adsorbed by inside active carbon and is purified when the push-and-pull groove, improves exhaust emission's quality, and the push-and-pull groove has half to be located the inside of outlet duct through the mode of push-and-pull all the time, and the convenient non-stop change active carbon.
The invention has the beneficial effects that: the circulating oil tank of the purification method is internally provided with a switch which can be opened along with the descending of the oil level, when the liquid level of the washing oil is excessively descended, the floating ball drives the extrusion plate to descend, the switch is touched and opened, and the new oil is introduced from the inside of the new oil tank, so that the washing oil is always inside the purification tower for washing; the wafer polymer filter plate inside the purification tower is inclined, and after the washing oil is sprayed out by the washing oil spray head, the washing oil can downwards flow along the inclined wafer polymer filter plate, so that the effect of comprehensively washing the wafer polymer filter plate is achieved; the air outlet pipe at the top of the purification tower is provided with a push-pull groove capable of being pulled, and the push-pull groove can be replaced by a push-pull groove, so that the activated carbon is always adsorbed in the pipeline of the air outlet pipe, and the air outlet pipe does not need to be stopped and replaced.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.
FIG. 1 is a schematic sectional view of a purification column according to the present invention;
FIG. 2 is a sectional view of the circulating wash oil tank of the present invention;
fig. 3 is an enlarged schematic view of the structure at a of the present invention.
In the figure: 1. a purification tower; 2. a first slot; 3. a wafer polymer filter plate; 4. an air inlet pipe; 5. a sloping plate; 6. circularly washing the oil tank; 7. a first communicating pipe; 8. an oil pump; 9. a slide pipe; 10. a limiting ring; 11. a floating ball; 12. a connecting rod; 13. a pressing plate; 14. a switch; 15. a new oil tank; 16. a second communicating pipe; 17. an oil washing spray head; 18. an air outlet pipe; 19. a second slot; 20. a gasket; 21. a push-pull groove; 22. a ventilation groove; 23. blocking; 24. and (6) cooling the plate.
The specific implementation mode is as follows:
as shown in fig. 1 to 3, the following technical solutions are adopted in the present embodiment: a waste gas recovery and purification method in crude benzene hydrofining production comprises a purification tower 1 and a circulating wash oil tank 6, wherein an inclined plate 5 is arranged at the bottom of the inner wall of the purification tower 1, the inclination angle of the inclined plate 5 is larger than ten degrees, a communicating pipe 7 is fixedly connected to the position of the outer part of the purification tower 1 relative to the bottom of the inclined plate 5, the communicating pipe 7 is communicated with the inner part of the purification tower 1, one end of the communicating pipe 7, far away from the purification tower 1, is fixedly connected with the top of one side of the circulating wash oil tank 6, the communicating pipe 7 is communicated with the inner part of the circulating wash oil tank 6, an oil pump 8 is fixedly connected to the top of the circulating wash oil tank 6, the input end of the oil pump 8 extends to the bottom of the inner wall of the circulating wash oil tank 6, a new oil tank 15 is arranged at the top of the circulating wash oil tank 6, a discharge pipe of the new oil tank, the improved purification device is characterized in that a sliding pipe 9 is fixedly connected to one side of the inner wall of the circulating oil washing tank 6, a floating ball 11 is connected to the inside of the sliding pipe 9 in a sliding mode, two first inserting grooves 2 are fixedly connected to the middle of the inner wall of the purification tower 1, a wafer polymer filtering plate 3 is inserted between the first inserting grooves 2, the wafer polymer filtering plate 3 is inclined thirty degrees, an air outlet pipe 18 is arranged at the top of the purification tower 1, and a push-pull groove 21 is movably connected to the inside of the air outlet pipe 18.
The top of the floating ball 11 is fixedly connected with a connecting rod 12, the top of the connecting rod 12 is fixedly connected with an extrusion plate 13, the middle inner wall of the sliding pipe 9 is fixedly connected with a limiting ring 10, the connecting rod 12 is connected with the limiting ring 10 in a sliding mode, the top of the limiting ring 10 is fixedly connected with a switch 14, and the switch 14 is electrically connected with electromagnetic valves of discharge pipes of the oil pump 8 and the new oil tank 15.
Wherein, the lateral wall of purifying column 1 is located the below fixedly connected with intake pipe 4 of wafer polymer filter 3, intake pipe 4 and purifying column 1's inside intercommunication, No. two communicating pipes 16 of output fixedly connected with of oil pump 8, No. two one end that oil pump 8 was kept away from to communicating pipe 16 extend to purifying column 1's inside and fixedly connected with wash oil shower nozzle 17, wash oil shower nozzle 17 and be located the top of wafer polymer filter 3.
The air outlet pipe 18 is a square pipe, two opposite slots 19 are formed in two sides of the air outlet pipe 18, the push-pull slot 21 is connected with the slots 19 in an inserting mode, and the length of the push-pull slot 21 is twice the width of the air outlet pipe 18.
The middle of the push-pull groove 21 is fixedly connected with a baffle, the bottom of the push-pull groove 21 is positioned on two sides of the baffle and is provided with a ventilating groove 22, the inside of the ventilating groove 22 is fixedly connected with a barrier net 23, and activated carbon is accumulated in the push-pull groove 21 and positioned on the top of the barrier net 23.
The top of the second slot 19 is fixedly connected with a sealing gasket 20, and the bottom of the sealing gasket 20 is in contact with the top of the push-pull slot 21 and a middle baffle plate thereof.
Wherein, the inner wall fixedly connected with cooling plate 24 of circulation wash oil tank 6, cooling plate 24 can cool down wash oil, and viscosity and temperature have certain relation, and the higher the temperature, the less viscosity, the lower the temperature, viscosity is big more, is used for increasing the content of benzene in wash oil.
Specifically, the method comprises the following steps: a method for recovering and purifying waste gas in crude benzene hydrofining production comprises introducing recovered waste gas into a purification tower 1 through an air inlet pipe 4, introducing the benzene density into the purification tower 1, introducing the waste gas into the purification tower 1 and upwards, passing through a wafer polymer filter plate 3, isolating most benzene molecules in the air through the filter plate, starting an oil pump 8, introducing wash oil in a circulating wash oil tank 6 into the purification tower 1 through a second communicating pipe 16 and a wash oil nozzle 17 by the oil pump 8, spraying the wash oil on the wafer polymer filter plate 3, taking away the benzene on the wafer polymer filter plate 3, allowing the sprayed wash oil to fall to the bottom of the purification tower 1, entering the circulating wash oil tank 6 along an inclined plate 5 and a first communicating pipe 7, floating on the oil surface due to the benzene density being smaller than the wash oil density, and sucking out the wash oil from the continuous circulating wash oil tank 6 by the oil pump 8, promote the top of wafer polymer filter 3 when the oil level descends too much easily with benzene absorption, therefore, set up floater 11, when the inside oil mass of circulation wash oil tank 6 is less, floater 11 drives stripper plate 13 and descends, after switch 14 and stripper plate 13 contact, oil pump 8 closes, the solenoid valve of new oil tank 15 is opened, new oil gets into in the circulation wash oil tank 6, gas after the filtration upwards outwards discharges through outlet duct 18, during the discharge, gas is further adsorbed by inside active carbon and is purified when passing through push-and-pull groove 21, improve exhaust emission's quality, push-and-pull groove 21 passes through the mode of push-and-pull, half is located the inside of outlet duct 18 all the time, the convenient non-stop change active carbon.
While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (8)
1. The method for recovering and purifying the waste gas in the crude benzene hydrofining production is characterized by comprising a purification tower (1) and a circulating wash oil tank (6), wherein an inclined plate (5) is arranged at the bottom of the inner wall of the purification tower (1), the inclination angle of the inclined plate (5) is more than ten degrees, a first communicating pipe (7) is fixedly connected to the position of the bottom of the inclined plate (5) opposite to the outside of the purification tower (1), the first communicating pipe (7) is communicated with the inside of the purification tower (1), one end, away from the purification tower (1), of the first communicating pipe (7) is fixedly connected with the top of one side of the circulating wash oil tank (6), the first communicating pipe (7) is communicated with the inside of the circulating wash oil tank (6), an oil pump (8) is fixedly connected to the top of the circulating wash oil tank (6), the input end of the oil pump (8) extends to the bottom of the inner wall of the circulating wash oil tank (6), the top of circulation tank (6) is equipped with new oil tank (15), the discharging pipe of new oil tank (15) and the inside intercommunication of circulation tank (6), inner wall one side fixedly connected with slide pipe (9) of circulation tank (6), the inside sliding connection of slide pipe (9) has floater (11), two slots (2) of inner wall middle part fixedly connected with of purifying column (1), two insert between slot (2) and be equipped with wafer polymer filter (3), wafer polymer filter (3) slope thirty degrees, outlet duct (18) have been seted up at the top of purifying column (1), the inside swing joint of outlet duct (18) has push-and-pull groove (21).
2. The method for recovering and purifying the waste gas generated in the hydrofining production of crude benzene according to claim 1, characterized in that: the top fixedly connected with connecting rod (12) of floater (11), the top fixedly connected with stripper plate (13) of connecting rod (12), the middle part inner wall fixedly connected with spacing ring (10) of slide pipe (9), connecting rod (12) and spacing ring (10) sliding connection, the top fixedly connected with switch (14) of spacing ring (10), solenoid valve electric connection of switch (14) and oil pump (8), new oil tank (15) discharging pipe.
3. The method for recovering and purifying the waste gas generated in the hydrofining production of crude benzene according to claim 1, characterized in that: the utility model discloses a purification tower, including purification tower (1), the below fixedly connected with intake pipe (4) of lateral wall in wafer polymer filter (3), intake pipe (4) and the inside intercommunication of purification tower (1), the output end fixedly connected with of oil pump (8) No. two communicating pipe (16), No. two one end of keeping away from oil pump (8) communicating pipe (16) extend to the inside and the fixedly connected with of purification tower (1) wash oil shower nozzle (17), wash oil shower nozzle (17) and be located the top of wafer polymer filter (3).
4. The method for recovering and purifying the waste gas generated in the hydrofining production of crude benzene according to claim 1, characterized in that: the air outlet pipe (18) is a square pipe, two opposite slots (19) are formed in two sides of the air outlet pipe (18), the push-pull groove (21) is connected with the slots (19) in an inserting mode, and the length of the push-pull groove (21) is twice the width of the air outlet pipe (18).
5. The method for recovering and purifying the waste gas generated in the hydrofining production of crude benzene according to claim 4, characterized in that: the middle part fixedly connected with baffle of push-and-pull groove (21), the bottom of push-and-pull groove (21) is located the baffle both sides and all cuts and is equipped with ventilative groove (22), the equal fixedly connected with barrier net (23) of inside in ventilative groove (22), the inside of push-and-pull groove (21) and the top that is located barrier net (23) are piled up there is the active carbon.
6. The method for recovering and purifying the waste gas generated in the hydrofining production of crude benzene according to claim 1, characterized in that: the top of the second slot (19) is fixedly connected with a sealing gasket (20), and the bottom of the sealing gasket (20) is in contact with the top of the push-pull slot (21) and a middle baffle plate of the push-pull slot.
7. The method for recovering and purifying the waste gas generated in the hydrofining production of crude benzene according to claim 1, characterized in that: and the inner wall of the circulating oil washing tank (6) is fixedly connected with a cooling plate (24).
8. The method for recovering and purifying the exhaust gas according to claim 1, comprising the steps of:
t1, the inside of purifying column (1) is introduced through intake pipe (4) to the waste gas of retrieving, because the density of benzene is less than the density of air, waste gas makes progress after getting into purifying column (1), during through wafer polymer filter (3), keep apart most benzene molecules in with the air through the filter, open oil pump (8), wash oil in oil pump (8) will circulate wash oil tank (6) through No. two communicating pipes (16) and wash oil shower nozzle (17) and spray on wafer polymer filter (3) after getting into purifying column (1), take away the benzene on wafer polymer filter (3).
T2, the washing oil after spraying falls on the bottom of the purification tower (1), and enters a circulating washing oil tank (6) along an inclined plate (5) and a first communicating pipe (7), and benzene can float on the oil surface because the density of the benzene is smaller than that of the washing oil, and the washing oil is continuously sucked out from the circulating washing oil tank (6) by an oil pump (8), so that the benzene is easily absorbed and lifted above a wafer polymer filter plate (3) when the oil surface descends too much, therefore, a floating ball (11) is arranged, when the internal oil amount of the circulating washing oil tank (6) is small, the floating ball (11) drives an extrusion plate (13) to descend, after a switch (14) is in contact with the extrusion plate (13), the oil pump (8) is closed, an electromagnetic valve of a new oil tank (15) is opened, and the new oil enters the circulating washing oil tank (6).
T3, simultaneously with T2, the gas after the filtration upwards outwards discharges through outlet duct (18), and during the discharge, gas is further adsorbed by inside active carbon and is purified when passing through push-and-pull groove (21), improves exhaust emission's quality, and push-and-pull groove (21) have half all the time to be located the inside of outlet duct (18) through the mode of push-and-pull, and the convenience is not shut down and is changed the active carbon.
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| CN202110059581.6A CN112892156A (en) | 2021-01-18 | 2021-01-18 | Method for recovering and purifying waste gas in crude benzene hydrofining production |
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| CN202110059581.6A CN112892156A (en) | 2021-01-18 | 2021-01-18 | Method for recovering and purifying waste gas in crude benzene hydrofining production |
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Application publication date: 20210604 |