CN111974181A - Flue gas treatment device for asphalt workshop - Google Patents

Flue gas treatment device for asphalt workshop Download PDF

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Publication number
CN111974181A
CN111974181A CN202010892220.5A CN202010892220A CN111974181A CN 111974181 A CN111974181 A CN 111974181A CN 202010892220 A CN202010892220 A CN 202010892220A CN 111974181 A CN111974181 A CN 111974181A
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CN
China
Prior art keywords
area
flue gas
filler
purification
shower
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Granted
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CN202010892220.5A
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Chinese (zh)
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CN111974181B (en
Inventor
金洪生
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Hangzhou Hengji New Material Technology Co ltd
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Hangzhou Yiyou Agricultural Means Of Production Co ltd
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Priority to CN202010892220.5A priority Critical patent/CN111974181B/en
Publication of CN111974181A publication Critical patent/CN111974181A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/32Separation 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 electrical effects other than those provided for in group B01D61/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D50/00Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/10Combinations of devices covered by groups B01D45/00, B01D46/00 and B01D47/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/02Separation 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
    • B01D53/04Separation 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
    • B01D53/0407Constructional details of adsorbing systems
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2253/00Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10Inorganic adsorbents
    • B01D2253/102Carbon
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/40Further details for adsorption processes and devices
    • B01D2259/40083Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2259/00Type of treatment
    • B01D2259/80Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
    • B01D2259/818Employing electrical discharges or the generation of a plasma
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Treating Waste Gases (AREA)
  • Road Paving Machines (AREA)

Abstract

The invention discloses a flue gas treatment device of an asphalt workshop, which comprises a filtering area, a discharging area and a purifying area which are sequentially arranged, wherein the filtering area is formed by a bent pipeline, and a filter screen is arranged in the pipeline; arc-shaped baffles which are distributed in a vertically staggered manner are arranged in the discharge area, discharge bodies are arranged on the inner concave surfaces of the arc-shaped baffles, and active carbon is arranged on the outer convex surfaces of the arc-shaped baffles; the purification area comprises an outer shell and an inner shell, purification filler is arranged between the outer shell and the inner shell, the inner shell is provided with a through hole, a rotating shaft driven by a motor is arranged in the inner shell, and a filler plate is arranged on the rotating shaft; the outside of discharge region and clean area is connected with first shower and second shower respectively, is equipped with the first shower head that stretches into in the discharge region on the first shower, is equipped with the second shower head that stretches into in the filler district on the second shower. The invention combines a plurality of purification means, and has the functions of improving the flue gas purification efficiency and facilitating the cleaning of the interior of the device.

Description

Flue gas treatment device for asphalt workshop
Technical Field
The invention relates to a purification technology of an asphalt workshop, in particular to a flue gas treatment device of the asphalt workshop.
Background
In the production process of asphalt, various modifiers, additives, fillers and the like are required to be heated, stirred and the like according to different formulas, and then are conveyed to a production line through a pipeline pump. In the process, a large amount of asphalt smoke is generated, the smoke has unpleasant smell, part of compounds are harmful to human health, and in order to reduce the pollution of smoke dust to the atmosphere, the generated smoke is generally required to be treated to remove substances such as dust, tar and carbazole in the smoke. The existing asphalt flue gas treatment device is generally a simple plate-type absorption tower, and is treated by a filtering or washing spraying mode, the process is simple, wherein the flue gas is discharged at a high speed, the contact between the flue gas and treatment substances is insufficient, the problems of poor cooling effect and unsatisfactory purification efficiency exist, a pipeline for general flue gas treatment is long, the interior of the pipeline is not easy to clean, after a long time, the deposition and blockage of pollutants are easy to occur in the pipeline, the normal discharge of the flue gas is influenced, some of the pollutants for adsorbing the pollutants are adsorbed for a long time and are saturated after being filtered, and the pollutants are difficult to take out and clean in the pipeline, so that the subsequent treatment effect is influenced, and the effect of fully purifying the flue gas cannot be achieved. Therefore, the existing asphalt flue gas treatment device has the problems of unsatisfactory purification efficiency and difficulty in cleaning the interior of a pipeline.
Disclosure of Invention
The invention aims to provide a flue gas treatment device for an asphalt workshop. The invention combines a plurality of purification means, and has the functions of improving the flue gas purification efficiency and facilitating the cleaning of the interior of the device.
The technical scheme of the invention is as follows: a flue gas treatment device for an asphalt workshop comprises a filtering area, a discharging area and a purifying area which are sequentially arranged, wherein the filtering area is formed by a bent pipeline, and a plurality of filter screens are arranged in the pipeline; a plurality of arc-shaped baffles which are distributed in a vertically staggered manner are arranged in the discharge area, discharge bodies are arranged on the inner concave surfaces of the arc-shaped baffles, activated carbon is arranged on the outer convex surfaces of the arc-shaped baffles, and the bottom of the discharge area is inclined downwards to face the purification area; the purification area comprises an outer shell and an inner shell, a filler area is arranged between the outer shell and the inner shell, purification filler is arranged in the filler area, a through hole communicated with the filler area is formed in the inner shell, a discharge area is communicated with the filler area, a rotating shaft driven by a motor is arranged in the inner shell, and a plurality of filler plates are arranged on the rotating shaft; the outside of discharge area and clean area still is connected with first shower and second shower respectively through the support, is equipped with on the first shower and stretches into in the discharge area, is located between the adjacent cowl and towards the first shower of cowl, is equipped with on the second shower to stretch into the second shower in the filler district.
In the smoke treatment device for the asphalt workshop, the bottom bending part of the pipeline is provided with the dust exhaust port, the outer part of the bottom bending part of the pipeline is provided with the dust exhaust pipe, the outer part of the dust exhaust pipe is provided with the sliding pipe sleeve which moves up and down along the dust exhaust pipe, the inner part of the dust exhaust pipe is provided with the connecting rod, the lower end of the connecting rod is connected with the sliding pipe sleeve, the upper end of the connecting rod is provided with the covering plate covering the dust exhaust port, and the covering plate is connected with the pipeline through the spring. The covering plate is further adsorbed with the pipeline through the magnetic piece.
In the flue gas treatment device for the asphalt workshop, the connecting rod is further provided with a plurality of brush plates, and the brush plates are attached to the inner side surfaces of the dust exhaust pipes.
In the flue gas treatment device for the asphalt workshop, a dust collection box is further arranged at the bottom of the sliding pipe sleeve and below the dust exhaust pipe, and the dust collection box is connected with the sliding pipe sleeve in a drawing mode.
In the flue gas treatment device for the asphalt workshop, the discharge bodies of the upper row of arc-shaped baffles face the purification area, and the discharge bodies of the lower row of arc-shaped baffles face the filtration area.
In the flue gas treatment device for the asphalt workshop, the first spray pipe and the second spray pipe are connected with the spray box, and a valve is arranged between the first spray pipe and the second spray pipe.
In the flue gas treatment device for the asphalt workshop, the bottom of the purification area is provided with the water receiving tank, and one side of the outlet of the purification area is provided with the exhaust pipe.
Compared with the prior art, the flue gas treatment device is divided into three filtering areas, a discharging area and a purifying area, and the dedusting and purifying technologies such as filtering, adsorption, ionic current dedusting and washing are combined to purify the flue gas; the filter area is arranged in a winding manner, so that the filter effect is improved, the better cooling treatment is realized, and the dust exhaust pipe is arranged to clean the filter area, so that the situations of impurity accumulation and blockage are avoided; the discharge area is provided with a plurality of arc-shaped baffles, so that smoke is blocked, the passing time of airflow is prolonged, the contact time and area of the airflow with the activated carbon and the discharge body are increased, the purification effect is improved, and the first spray head is utilized for further cooling, dedusting and cleaning; the purification area is provided with static purification filler and dynamic filler plates, the spraying liquid directly washes the flue gas, and the spraying liquid covers the purification filler and the filler plates to form a liquid film to remove pollutants in the flue gas, so that the reaction area is increased, the treatment is more comprehensive, and the flue gas purification efficiency is improved.
Therefore, the invention combines a plurality of purification means, and has the functions of improving the flue gas purification efficiency and facilitating the cleaning of the interior of the device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a dust exhaust pipe;
FIG. 3 is a schematic view of the construction of the cover plate and the pipe;
fig. 4 is a schematic structural view of the curved baffle.
The labels in the figures are: 1. a filtration zone; 11. a pipeline; 12. a filter screen; 13. a dust exhaust port; 14. a dust exhaust pipe; 15. a sliding pipe sleeve; 151. a dust collection box; 16. a connecting rod; 161. brushing the board; 17. a cover plate; 18. a spring; 19. a magnetic member; 2. a discharge region; 21. an arc-shaped baffle plate; 22. a discharge body; 23. activated carbon; 3. a purification zone; 31. an outer housing; 32. an inner housing; 33. purifying the filler; 34. a through hole; 35. a rotating shaft; 36. a filler sheet; 41. a first shower pipe; 42. a second shower pipe; 43. a first shower head; 44. a second shower head; 45. a spray box; 46. a valve; 47. a water receiving tank; 48. and (4) exhausting the gas.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given.
As shown in fig. 1-4, a flue gas treatment device for an asphalt plant comprises a filtering area 1, a discharging area 2 and a purifying area 3 which are arranged in sequence, wherein the filtering area 1 is formed by a bent pipeline 11, and a plurality of filter screens 12 are arranged in the pipeline 11; the dust exhaust device is characterized in that a dust exhaust port 13 is formed in the bottom bending part of the pipeline 11, a dust exhaust pipe 14 extending downwards is arranged outside the bottom bending part of the pipeline 11, a sliding pipe sleeve 15 moving up and down along the dust exhaust pipe 14 is arranged outside the dust exhaust pipe 14, a connecting rod 16 is arranged inside the dust exhaust pipe 14, the lower end of the connecting rod 16 is connected with the sliding pipe sleeve 15, a covering plate 17 covering the dust exhaust port 13 is arranged at the upper end of the connecting rod 16, and the covering plate 17 is connected with the pipeline 11 through a spring 18. The cover plate 17 is further attracted to the pipe 11 by the magnetic member 19. The connecting rod 16 is further provided with a plurality of brush plates 161, and the brush plates 161 are attached to the inner side surface of the dust exhaust pipe 14. The bottom of the sliding pipe sleeve 15 is positioned below the dust exhaust pipe 14 and is further provided with a dust collection box 151, and the dust collection box 151 is connected with the sliding pipe sleeve 15 in a removable manner. The dust collection box 151 is similar to a drawer structure, and the dust collection box 151 containing impurities can be conveniently taken out for cleaning.
The smoke discharged from an asphalt workshop passes through a winding-distributed pipeline 11 and is filtered by a layer of filter screen 12 in the filtering area 1 to remove large granular substances, and the smoke passes through the winding-curved pipeline 11 to prolong the filtering time, so that the filtering effect is improved, and the temperature of the smoke is greatly reduced; particle impurities in the flue gas are easy to deposit at the bent part of the pipeline 11 and are not easy to clean, and the circulation of the flue gas can be influenced for a long time, so that a cleaning structure of a curve is arranged, the sliding pipe sleeve 15 is pulled downwards to drive the covering plate 17 to be separated from the dust exhaust port 13, so that the particle impurities deposited at the curve are exhausted, meanwhile, the brush plate 161 is driven to brush the inner wall of the dust exhaust pipe 14, impurities attached to the dust exhaust pipe 14 are removed, the impurity residues are reduced, and the cleaning rate is improved; in the process of pulling the sliding pipe sleeve 15 back and forth, the covering plate 17 impacts the pipeline 11 back and forth, so that the filter screen 12 in the pipeline 11 vibrates to a certain degree, impurities attached to the filter screen 12 are vibrated down and discharged, the filtering area 1 is further cleaned, and the smoke filtering efficiency and the passing rate are improved.
A plurality of arc-shaped baffles 21 which are distributed in a vertically staggered manner are arranged in the discharge region 2, discharge bodies 22 are arranged on the inner concave surfaces of the arc-shaped baffles 21, activated carbon 23 is arranged on the outer convex surfaces of the arc-shaped baffles 21, and the bottom of the discharge region 2 inclines downwards towards the purification region 3; the discharge bodies 22 of the upper row of arc-shaped baffles 21 face the purification area 3, and the discharge bodies 22 of the lower row of arc-shaped baffles 21 face the filtering area 1.
The purification area 3 comprises an outer shell 31 and an inner shell 32, a filler area is arranged between the outer shell 31 and the inner shell 32, a purification filler 33 is arranged in the filler area, a through hole 34 communicated with the filler area is formed in the inner shell 32, the discharge area 2 is communicated with the filler area, a rotating shaft 35 driven by a motor is arranged in the inner shell 32, and a plurality of filler plates 36 are arranged on the rotating shaft 35; the exterior of the discharge region 2 and the exterior of the purification region 3 are respectively connected with a first spray pipe 41 and a second spray pipe 42 through a support, the first spray pipe 41 is provided with a first spray head 43 which extends into the discharge region 2, is positioned between the adjacent arc-shaped baffles 21 and faces the arc-shaped baffles 21, and the second spray pipe 42 is provided with a second spray head 44 which extends into the packing region. The first spray pipe 41 and the second spray pipe 42 are both connected with a spray box 45, and a valve 46 is arranged between the first spray pipe 41 and the second spray pipe 42. The bottom of purification area 3 is equipped with water receiving tank 47, and purification area 3's export one side is equipped with blast pipe 48.
The flue gas enters the discharge area 2, the time of the flue gas in the discharge area 2 is prolonged through the blocking of the arc-shaped baffles 21, the flue gas is fully contacted and treated with the plurality of activated carbon 23 and the discharge bodies 22, the adsorption effect of the activated carbon 23 is improved, the discharge bodies 22 decompose the gas, the discharge bodies 22 are arranged oppositely, the electric fields are superposed, the breakdown capacity of the gas is improved, and the treatment effect of the flue gas in the discharge area 2 is enhanced; wherein still set up and be located between adjacent cowl 21 and towards cowl 21's first shower head 43, not only spray, dust fall and the cooling to the flue gas one by one, utilize first shower head 43 can also spray organic solvent to active carbon 23 moreover for saturated active carbon 23 is with the desorption of adsorbed material and regeneration, reuse active carbon 23.
Flue gas enters into purification area 3, diffusion in purification area 3, second shower 42 blowout washing liquid, the washing liquid enters into the filler district, hang the membrane on purifying filler 33, catch dust in the gas, other pollutants such as polycyclic aromatic hydrocarbon material, the washing liquid enters into in purification area 3 simultaneously, contact with gas and filler plate 36, direct washing gas on the one hand, on the other hand also hangs the membrane on filler plate 36, filler plate 36 rotates under the drive of axis of rotation 35 and motor, increase the area of contact of filler plate 36 and gas on the one hand, enlarge the purification range, on the other hand stirs gas, improve gaseous flow velocity, make more gas enter into the filler district, fully with purifying filler 33 contact, increase reaction area, thereby flue gas purification efficiency has been improved. The final purified gas is exhausted through an exhaust pipe 48.
Wherein, the bottom slope of arrester region 2 is downward towards purification zone 3 for the spray of arrester region 2 flows into in water receiving tank 47, and the spray of purification zone 3 also enters into water receiving tank 47 and collects, discharges.

Claims (7)

1. The utility model provides a flue gas processing apparatus in pitch workshop which characterized in that: the device comprises a filtering area (1), a discharging area (2) and a purifying area (3) which are sequentially arranged, wherein the filtering area (1) is formed by a bent pipeline (11), and a plurality of filter screens (12) are arranged in the pipeline (11); a plurality of arc-shaped baffles (21) which are distributed in a vertically staggered manner are arranged in the discharge region (2), discharge bodies (22) are arranged on the inner concave surfaces of the arc-shaped baffles (21), activated carbon (23) is arranged on the outer convex surface of each arc-shaped baffle (21), and the bottom of the discharge region (2) is inclined downwards and faces the purification region (3); the purification area (3) comprises an outer shell (31) and an inner shell (32), a filler area is arranged between the outer shell (31) and the inner shell (32), a purification filler (33) is arranged in the filler area, a through hole (34) communicated with the filler area is formed in the inner shell (32), the discharge area (2) is communicated with the filler area, a rotating shaft (35) driven by a motor is arranged in the inner shell (32), and a plurality of filler plates (36) are arranged on the rotating shaft (35); the outside of discharge area (2) and clean area (3) still is connected with first shower (41) and second shower (42) respectively through the support, is equipped with on first shower (41) and stretches into in discharge area (2), is located between adjacent cowl (21) and towards cowl (21)'s first shower head (43), is equipped with on second shower (42) and stretches into second shower head (44) in the filler district.
2. The flue gas treatment device of the asphalt plant according to claim 1, wherein: the utility model discloses a dust exhaust device, including pipeline (11), the bottom bend of pipeline (11) is equipped with dust exhaust mouth (13), the outside of the bottom bend of pipeline (11) is equipped with dust exhaust pipe (14), the outside of dust exhaust pipe (14) is equipped with along sliding pipe box (15) that dust exhaust pipe (14) reciprocated, the inside of dust exhaust pipe (14) is equipped with connecting rod (16), the lower extreme and the sliding pipe box (15) of connecting rod (16) are connected, the upper end of connecting rod (16) is equipped with overlay (17) that covers dust exhaust mouth (13), overlay (17) are connected with pipeline (11) through spring (18).
3. The flue gas treatment device of the asphalt plant according to claim 2, wherein: the connecting rod (16) is also provided with a plurality of brush plates (161), and the brush plates (161) are attached to the inner side surface of the dust exhaust pipe (14).
4. The flue gas treatment device of the asphalt plant according to claim 2, wherein: the bottom of the sliding pipe sleeve (15) is positioned below the dust exhaust pipe (14) and is also provided with a dust collection box (151), and the dust collection box (151) is connected with the sliding pipe sleeve (15) in a removable manner.
5. The flue gas treatment device of the asphalt plant according to claim 1, wherein: the discharge bodies (22) of the upper row of arc-shaped baffles (21) face the purification area (3), and the discharge bodies (22) of the lower row of arc-shaped baffles (21) face the filtration area (1).
6. The flue gas treatment device of the asphalt plant according to claim 1, wherein: the first spraying pipe (41) and the second spraying pipe (42) are connected with a spraying box (45), and a valve (46) is arranged between the first spraying pipe (41) and the second spraying pipe (42).
7. The flue gas treatment device of the asphalt plant according to claim 1, wherein: the bottom of purification area (3) is equipped with water receiving tank (47), and the export one side of purification area (3) is equipped with blast pipe (48).
CN202010892220.5A 2020-08-31 2020-08-31 Flue gas processing apparatus in pitch workshop Active CN111974181B (en)

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CN202010892220.5A CN111974181B (en) 2020-08-31 2020-08-31 Flue gas processing apparatus in pitch workshop

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Application Number Priority Date Filing Date Title
CN202010892220.5A CN111974181B (en) 2020-08-31 2020-08-31 Flue gas processing apparatus in pitch workshop

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CN111974181A true CN111974181A (en) 2020-11-24
CN111974181B CN111974181B (en) 2022-08-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113230865A (en) * 2021-06-03 2021-08-10 安徽天顺环保设备股份有限公司 Large submerged arc furnace flue gas centralized treatment guiding device and implementation method thereof

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CN107762986A (en) * 2017-10-27 2018-03-06 刘轩 A kind of environment-friendly type can self-cleaning exhaust fan
WO2019212191A1 (en) * 2018-05-03 2019-11-07 Kim Bu Yeol Positive pressure and negative pressure maintenance system having bacteria sterilizing function and harmful material and radioactive material removing function
CN110339675A (en) * 2019-06-21 2019-10-18 中北大学 A kind of method and apparatus removing isopropanol gas
CN110843364A (en) * 2019-11-25 2020-02-28 杭州永晶科技有限公司 Corrugated paper is clearance mechanism for printing machine
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В·Я·福金等: "《中等专业学校教学用书 人造液体燃料厂设备 上》", 31 October 1957, 石油工业出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113230865A (en) * 2021-06-03 2021-08-10 安徽天顺环保设备股份有限公司 Large submerged arc furnace flue gas centralized treatment guiding device and implementation method thereof

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