CN114377510A - Tail gas treatment device and method for high-softening-point asphalt production - Google Patents
Tail gas treatment device and method for high-softening-point asphalt production Download PDFInfo
- Publication number
- CN114377510A CN114377510A CN202210152144.3A CN202210152144A CN114377510A CN 114377510 A CN114377510 A CN 114377510A CN 202210152144 A CN202210152144 A CN 202210152144A CN 114377510 A CN114377510 A CN 114377510A
- Authority
- CN
- China
- Prior art keywords
- tail gas
- heat transfer
- condenser
- stage
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010426 asphalt Substances 0.000 title claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000012546 transfer Methods 0.000 claims abstract description 40
- 239000011229 interlayer Substances 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 41
- 238000010438 heat treatment Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 13
- 238000012806 monitoring device Methods 0.000 claims description 11
- 238000001179 sorption measurement Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 7
- 238000010926 purge Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 239000010771 distillate fuel oil Substances 0.000 claims description 3
- 239000006227 byproduct Substances 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 54
- 239000000047 product Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000002341 toxic gas Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 150000001491 aromatic compounds Chemical class 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 239000011269 tar Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011302 mesophase pitch Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 229930195734 saturated hydrocarbon Natural products 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
Abstract
The invention relates to a tail gas treatment device for producing high-softening-point asphalt, which sequentially comprises a primary condenser, a primary collecting tank, a secondary condenser, a secondary collecting tank, an incineration device and an activated carbon adsorber according to the flow direction of tail gas, wherein all the parts are connected in series through an outer pipeline; radiating pipes are arranged in the first-stage condenser and the second-stage condenser, and two ends of each radiating pipe are connected with an external pipeline; the two condensers are provided with a heat transfer medium inlet and a heat transfer medium outlet, and discharge pipelines are arranged at the bottoms of the two collecting tanks; the first-stage collecting tank comprises an inner cavity and a shell, a heat transfer medium interlayer is arranged between the inner cavity and the shell, and a heat transfer medium outlet and a heat transfer medium inlet are formed in the shell. The tail gas treatment device is combined, a method specially designed for the characteristics of tail gas components in the production process of the high-melting-point asphalt is further provided, tail gas is subjected to fractional condensation and recycling, the types of byproducts are enriched, the tail gas treatment capacity is reduced, the treatment efficiency is improved, and the defects of the related technology in the field are overcome to a certain extent.
Description
Technical Field
The invention relates to the technical field of asphalt production, in particular to a tail gas treatment device and method for high-softening-point asphalt production.
Background
Asphalt is a brown complex mixture composed of hydrocarbons with different molecular weights, and is a pavement structure cementing material, a waterproof and anticorrosion material with wide application in the civil engineering industry. As a byproduct of coal and petrochemical industry, asphalt is generally produced by a distillation process from coal tar, crude oil, residual oil, oil slurry, ethylene tar and the like, the softening point of the asphalt is generally less than 150 ℃, and tail gas generated in the production process contains a large amount of particulate matters, smoke and toxic aromatic compounds, and is directly discharged into the atmosphere to cause environmental pollution. Therefore, must handle it to exhaust emissions, utility model CN 212930022U and CN 213193038U have announced the tail gas processing apparatus in the pitch production process respectively, and its main technical essential lies in: (1) collecting particulate matters in the tail gas by using an electrostatic dust collection device; (2) and (3) using a high-temperature incineration device to incinerate toxic aromatic compounds and asphalt smoke in the tail gas.
In recent years, with the continuous development of asphalt treatment technology and carbon material preparation technology in China, the consumption of asphalt with a high softening point of more than 150 ℃ is gradually increased besides the conventional asphalt production with a softening point of less than 150 ℃. Currently, common high softening point asphalts include mesophase asphalts, general-purpose spinning asphalts, coated asphalts, high softening point impregnating asphalts, and the like. Different from conventional asphalt, high-softening-point asphalt is produced by using refined asphalt, refined oil slurry or refined ethylene tar as raw materials through a heat treatment process, on one hand, in order to prevent coking in the heat treatment process from influencing the product quality, the heat treatment temperature is generally controlled within 350-440 ℃, and the content of solid particles in tail gas is determined to be extremely low by the characteristics of the high-softening-point raw materials and the production process thereof; on the other hand, in order to increase the softening point of the asphalt, the light components in the asphalt generally need to be rapidly removed in the production process of the asphalt by adopting nitrogen bubbling, vacuum-bubbling, reduced pressure-bubbling, steam stripping and other modes, the light components mainly comprise aromatic compounds with boiling points lower than the heat treatment temperature and smaller molecular weights, and different from the conventional asphalt production, the light components are generally discharged out of an asphalt heat treatment device along with the purge gas and tail gas during the production of the asphalt with the high softening point. Therefore, the raw material and process characteristics of the high-softening-point asphalt determine that the tail gas composition in the production process of the high-softening-point asphalt is obviously different from that of the tail gas of the conventional asphalt, and the tail gas mainly comprises polycyclic aromatic hydrocarbon, alkane pyrolysis gas, S, N-containing gas and the like, so that a tail gas treatment device used in the conventional asphalt production process is not suitable for treating the tail gas in the high-softening-point asphalt production.
Therefore, the development of a technology and a device suitable for tail gas treatment in the production process of high-softening-point asphalt is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention mainly aims at the problems in the background technology and provides a device and a method for treating tail gas generated in the production process of high-softening-point asphalt.
A tail gas treatment device for producing high-softening-point asphalt sequentially comprises a primary condenser, a primary collecting tank, a secondary condenser, a secondary collecting tank, an incineration device and an activated carbon adsorber according to the flow direction of tail gas, wherein all the parts are connected in series through an outer pipeline;
radiating pipes are arranged in the first-stage condenser and the second-stage condenser, and two ends of each radiating pipe are connected with an external pipeline; the two condensers are provided with a heat transfer medium inlet and a heat transfer medium outlet, and discharge pipelines are arranged at the bottoms of the two collecting tanks;
the first-stage collecting tank comprises an inner cavity and a shell, a heat transfer medium interlayer is arranged between the inner cavity and the shell, and a heat transfer medium outlet and a heat transfer medium inlet are formed in the shell.
Further, the heat transfer medium used in the primary condenser and the primary collection tank includes any one of conduction oil, molten salt or metal sand.
Further, the heat transfer medium used in the secondary condenser is water.
Further, the heat transfer media in the primary condenser and the primary collecting tank are subjected to medium circulation heating temperature control through an external heating furnace.
Furthermore, the heat transfer media in the primary condenser and the primary collecting tank are heated and controlled in temperature by arranging a heater in the cavity.
Furthermore, the activated carbon adsorber adopts three-level adsorption, the particle size of the first-level adsorption activated carbon is 5-8mm, the particle size of the second-level adsorption activated carbon is 3-6mm, and the particle size of the third-level adsorption activated carbon is 1-4mm, and the activated carbon is adsorbed in a grading way by gradually reducing the particle size, so that the adsorption efficiency can be improved, and the treatment is more thorough.
Furthermore, the collecting tank is provided with a liquid level monitoring device, the discharge pipeline is provided with an electromagnetic valve, and the opening and closing of the electromagnetic valve are controlled through the liquid level monitoring device.
The invention provides a treatment method of the tail gas treatment device, which comprises the following steps:
tail gas generated in the high-softening-point asphalt heat treatment section enters a radiating pipe in a primary condenser through an outer pipeline under the drive of purge air flow, the temperature of heat transfer media in the primary condenser and a primary collecting tank is controlled to be 200-300 ℃, and generated primary condensed oil enters the primary collecting tank through the outer pipeline and is discharged from a pipeline at the bottom of the primary collecting tank after being stored to a certain amount;
the uncondensed tail gas in the primary condenser passes through a primary collecting tank and then enters a secondary condenser filled with a normal-temperature heat transfer medium through an external pipeline, and the generated secondary condensed oil enters a secondary collecting tank through the external pipeline, is stored to a certain amount and then is discharged from a pipeline at the bottom of the secondary collecting tank;
the tail gas that does not condense among the second grade condenser passes through the second grade collection tank and then gets into the device that burns through the outer pipeline, gets into the activated carbon adsorber after burning at high temperature, and the activated carbon adsorber can adsorb most sulphur, nitrogenous toxic gas to and collect because burn incomplete production's carbon black granule, the tail gas after the processing is discharged to the atmosphere at last.
Further, when the liquid level in the collecting tank reaches the tank body 2/3, the liquid level monitoring device senses the liquid level and controls the electromagnetic valve to be opened to discharge the condensed oil.
The main component of the product discharged from the first-stage collecting tank is polycyclic aromatic hydrocarbon with more than three rings and a certain amount of fat components (the fat component content is 30-50%), which can be used as a hydrogen supply solvent or fuel oil and the like in the production process of mesophase pitch, and the yield of the product accounts for 30-80% of the total amount of tail gas (except purge gas);
the main components of the product discharged from the secondary collection tank are tricyclic-lower small-molecular aromatic hydrocarbons and saturated hydrocarbons (the proportion of the small-molecular aromatic hydrocarbons and the saturated hydrocarbons is more than 90%), the product can be used as light fuel oil or gas and diesel oil admixtures, and the yield of the product accounts for 15-65% of the total amount of tail gas (except purge gas).
The invention also provides light fuel oil which is prepared from the secondary condensed oil produced by the treatment method.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
(1) the invention provides a tail gas recovery processing device and a method which are specially designed for the characteristics of tail gas components in the process of producing high-melting-point asphalt, and the defects of the related technology in the field are overcome to a certain extent;
(2) the invention carries out fractional condensation and recycling on the tail gas, enriches the product content of asphalt production enterprises with high softening points, reduces the tail gas treatment amount and improves the tail gas treatment efficiency;
(3) the tail gas is treated by adopting a mode of combining high-temperature incineration with activated carbon adsorption, and the high-efficiency treatment of asphalt smoke, nitrogen-containing and sulfur-containing toxic gas and the like in the tail gas can be realized, so that the safe emission standard of the tail gas is reached.
Drawings
Fig. 1 is a schematic view of the overall structure of the exhaust gas treatment device.
1-a first-stage condenser, 2-a first-stage collecting tank, 3-a second-stage condenser, 4-a second-stage collecting tank, 5-an incineration device, 6-an activated carbon adsorber, 7-a heat transfer medium inlet, 8-a heat transfer medium outlet, 9-a discharge pipeline and 10-an activated carbon layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be fully described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. Other embodiments, which can be derived by those skilled in the art from the embodiments of the present invention without any creative effort, are within the protection scope of the present invention.
As shown in fig. 1, a tail gas treatment device for high softening point asphalt production comprises a primary condenser, a primary collection tank, a secondary condenser, a secondary collection tank, an incineration device and an activated carbon adsorber in sequence according to the tail gas flow direction (arrow direction in fig. 1), wherein all the parts are connected in series through an outer pipeline;
radiating pipes are arranged in the first-stage condenser and the second-stage condenser, and two ends of each radiating pipe are connected with an external pipeline; the two condensers are provided with a heat transfer medium inlet and a heat transfer medium outlet, the bottoms of the two collecting tanks are provided with discharge pipelines, electromagnetic valves are arranged on the discharge pipelines, and the opening and the closing of the electromagnetic valves are controlled by the liquid level monitoring device.
The first-stage collecting tank comprises an inner cavity and an outer shell, a heat transfer medium interlayer is arranged between the inner cavity and the outer shell, a heat transfer medium inlet and a heat transfer medium outlet are formed in the outer shell, and the inner cavity and the outer shell of the outer pipeline are directly communicated into the cavity of the first-stage collecting tank.
The heat transfer medium used in the first-stage condenser and the first-stage collecting tank comprises any one of heat transfer oil, molten salt or metal sand, preferably the heat transfer oil, and the temperature of the first-stage condenser and the temperature of the first-stage collecting tank are controlled to be 200-300 ℃.
The heat transfer medium used in the secondary condenser is water, usually tap water, and the temperature of the secondary condenser is controlled to be normal temperature.
When the heat transfer medium adopts heat conduction oil or molten salt, the medium is generally heated and controlled in a circulating way by an external heating furnace; when the heat transfer medium is metal sand, a heater is generally arranged in the cavity to heat and control the temperature.
The activated carbon adsorber adopts three-stage adsorption, the size of the first-stage adsorption activated carbon particles is 5-8mm, the size of the second-stage adsorption activated carbon particles is 3-6mm, and the size of the third-stage adsorption activated carbon particles is 1-4 mm.
Example 1
Tail gas generated in the mesophase pitch heat treatment section enters a radiating pipe of a primary condenser through an outer pipeline under the drive of purge airflow, high-temperature heat conduction oil is filled in a cavity of the primary condenser, the heat conduction oil enters from a heat conduction medium inlet and returns to a heat conduction oil heating furnace from a heat conduction medium outlet, the heat conduction oil continuously circulates and controls the temperature of 250 ℃, condensed primary condensed oil enters a primary collecting tank, meanwhile, the heat conduction oil in an interlayer of the primary collecting tank continuously circulates and controls the temperature of 250 ℃, after the primary condensed oil is stored to 2/3 in the volume of a tank body, a liquid level monitoring device senses to control an electromagnetic valve of a corresponding discharge pipeline to be opened, and the primary condensed oil is discharged as a byproduct A. The yield of the byproduct A is 67% of the total amount of the tail gas, and the byproduct A is used as a hydrogen supply solvent after catalytic hydrogenation and flows back to a mesophase asphalt raw material preparation section for the hydrogenation modification of the raw material asphalt;
the tail gas that does not condense among the one-level condenser gets into the second grade condenser cooling tube through the outer pipeline on one-level collection tank upper portion, is full of the running water that flows in the second grade condenser cavity, and the second grade condensate oil after the condensation gets into the second grade collection tank, waits that the second grade condensate oil is stored to the 2/3 of jar body volume after, and liquid level monitoring device takes place the response, and the solenoid valve of the discharge pipe that the control corresponds is opened, discharges second grade condensate oil as secondary product second. The byproduct B can be used as fuel oil, and the yield of the byproduct B is 30 percent of the total amount of tail gas;
the uncondensed tail gas in the secondary condenser enters the incineration device through an outer pipeline at the upper part of the secondary collection tank, enters the activated carbon absorber after high-temperature incineration, adsorbs most of sulfur-containing and nitrogen-containing toxic gas, collects carbon black particles generated due to incomplete incineration, and exhausts the treated tail gas through the upper part of the activated carbon absorberThe port enters the atmosphere. The oil fume content of the asphalt in the treated tail gas is less than 0.14Kg/t, and the average emission concentration is less than 275mg/m3。
Example 2
The tail gas generated in a working section in the heat treatment process of preparing the coated asphalt by using ethylene tar as a raw material enters a radiating pipe in a primary condenser through a pipeline under the drive of purge air flow, high-temperature heat conduction oil is filled in a cavity of the condenser, the heat conduction oil enters from a heat conduction medium inlet and returns to a heat conduction oil heating furnace from a heat conduction medium outlet, the heat conduction oil is continuously circulated and the temperature is controlled to be 200 ℃, the condensed primary condensed oil enters a primary collecting tank, the heat conduction oil in an interlayer of the primary collecting tank is continuously circulated and the temperature is controlled to be 200 ℃, after the primary condensed oil is stored to 2/3 parts of the volume of a tank body, a liquid level monitoring device senses the condensed oil and controls an electromagnetic valve of a corresponding discharge pipeline to be opened, and the primary condensed oil is discharged as a byproduct A. The yield of the byproduct A is 34% of the total amount of the tail gas, and the byproduct A can be used as high-quality fuel oil;
the uncondensed tail gas in the first-stage condenser enters a radiating pipe of a second-stage condenser through a pipeline on the upper part of a first-stage collecting tank, flowing tap water is filled in a cavity of the second-stage condenser, condensed second-stage condensed oil enters a second-stage collecting tank, after the condensed second-stage condensed oil is stored to 2/3% of the volume of the tank body, a liquid level monitoring device senses to control an electromagnetic valve of a corresponding discharge pipeline to be opened, the condensed second-stage condensed oil is discharged as a byproduct B, the byproduct B can be used as a gas and diesel oil admixture, and the yield of the byproduct B is 62% of the total amount of the tail gas;
and the tail gas which is not condensed in the secondary condenser enters an incineration device, enters an activated carbon adsorber after high-temperature incineration, adsorbs most of sulfur-containing and nitrogen-containing toxic gas, collects carbon black particles generated due to incomplete incineration, and enters the atmosphere through an exhaust port at the upper part of the activated carbon adsorber. The oil fume content of the asphalt in the treated tail gas is less than 0.12Kg/t, and the average emission concentration is less than 260mg/m3。
Tap water heated by the radiating pipe in the cavity of the secondary condenser can be used as daily hot water for residents, so that the energy utilization efficiency is improved.
Claims (10)
1. A tail gas treatment device for asphalt production with high softening point is characterized by sequentially comprising a primary condenser, a primary collecting tank, a secondary condenser, a secondary collecting tank, an incineration device and an activated carbon adsorber according to the flow direction of tail gas, wherein all parts are connected in series through an outer pipeline;
radiating pipes are arranged in the first-stage condenser and the second-stage condenser, and two ends of each radiating pipe are connected with an external pipeline; the two condensers are provided with a heat transfer medium inlet and a heat transfer medium outlet, and discharge pipelines are arranged at the bottoms of the two collecting tanks;
the first-stage collecting tank comprises an inner cavity and a shell, a heat transfer medium interlayer is arranged between the inner cavity and the shell, and a heat transfer medium outlet and a heat transfer medium inlet are formed in the shell.
2. The tail gas treatment device for asphalt production with high softening point according to claim 1, wherein the heat transfer medium used in the primary condenser and the primary collection tank comprises any one of heat transfer oil, molten salt or metal sand.
3. The device for processing the tail gas generated in the production of the high-softening-point asphalt according to claim 1, wherein the heat transfer medium used in the secondary condenser is water.
4. The device for treating the tail gas generated by the production of the asphalt with the high softening point as claimed in claim 1, wherein the heat transfer media in the primary condenser and the primary collection tank are circularly heated and controlled in temperature by an external heating furnace.
5. The device for treating the tail gas generated in the production of the asphalt with the high softening point as claimed in claim 1, wherein the heat transfer media in the primary condenser and the primary collection tank are heated and controlled in temperature by arranging a heater in the cavity.
6. The device for treating the tail gas generated in the production of the asphalt with the high softening point as claimed in claim 1, wherein the activated carbon adsorber adopts three-stage adsorption, the particle size of the activated carbon adsorbed in the first stage is 5-8mm, the particle size of the activated carbon adsorbed in the second stage is 3-6mm, and the particle size of the activated carbon adsorbed in the third stage is 1-4 mm.
7. The device for processing the tail gas generated in the production of the asphalt with the high softening point as claimed in claim 1, wherein liquid level monitoring devices are arranged in the two collecting tanks, the discharge pipeline is provided with an electromagnetic valve, and the liquid level monitoring devices are connected with the electromagnetic valve and control the electromagnetic valve to open and close.
8. The method for treating the tail gas treatment device for the production of the high-softening-point asphalt according to any one of claims 1 to 7, characterized by comprising the following steps of:
tail gas generated in the high-softening-point asphalt heat treatment section enters a radiating pipe in a primary condenser through an outer pipeline under the drive of purge air flow, the temperature of heat transfer media in a cavity of the primary condenser and a primary collecting tank is controlled to be 200-300 ℃, and generated primary condensed oil enters a primary collecting tank through the outer pipeline, is stored to a certain amount and is discharged through a pipeline at the bottom of the primary collecting tank;
the uncondensed tail gas in the first-stage condenser enters a second-stage condenser filled with a normal-temperature medium through an outer pipeline after passing through a first-stage collecting tank, and the generated second-stage condensed oil enters a second-stage collecting tank through an outer pipeline, is stored to a certain amount and is discharged from a pipeline at the bottom of the second-stage collecting tank;
and the uncondensed tail gas in the secondary condenser passes through a secondary collection tank and then enters the incineration device through an outer pipeline, and then enters the activated carbon adsorber after being incinerated at high temperature and finally is discharged.
9. The method for processing the tail gas processing device in the production of the asphalt with the high softening point as claimed in claim 1, wherein when the liquid level in the collection tank reaches the tank body 2/3, the liquid level monitoring device senses that the electromagnetic valve is opened to discharge the condensed oil.
10. A light fuel oil produced from the secondary condensed oil produced by the method according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152144.3A CN114377510A (en) | 2022-02-18 | 2022-02-18 | Tail gas treatment device and method for high-softening-point asphalt production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210152144.3A CN114377510A (en) | 2022-02-18 | 2022-02-18 | Tail gas treatment device and method for high-softening-point asphalt production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114377510A true CN114377510A (en) | 2022-04-22 |
Family
ID=81206084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210152144.3A Pending CN114377510A (en) | 2022-02-18 | 2022-02-18 | Tail gas treatment device and method for high-softening-point asphalt production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114377510A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040118783A1 (en) * | 2002-12-20 | 2004-06-24 | Exxonmobil Upstream Research Company | Integrated water treatment and flue gas desulfurization process |
| CN107227167A (en) * | 2017-07-24 | 2017-10-03 | 洛阳融惠化工科技有限公司 | A kind of use heavy solvent de-oiled asphalt produces the method and device of superhard pitch |
| CN210125266U (en) * | 2019-04-29 | 2020-03-06 | 屏南时代新材料技术有限公司 | Material recovery condenser and material recovery equipment |
| CN210861128U (en) * | 2019-04-19 | 2020-06-26 | 农业农村部环境保护科研监测所 | Harmless treatment system for harmful gas in livestock and poultry house |
| CN212930022U (en) * | 2020-05-31 | 2021-04-09 | 盘锦北方沥青股份有限公司 | Tail gas treatment device in asphalt production process |
| US20210234147A1 (en) * | 2018-06-06 | 2021-07-29 | Kureha Corporation | Method for producing carbonaceous material for negative electrode of non-aqueous electrolyte secondary battery and production apparatus thereof |
| CN217698555U (en) * | 2022-02-18 | 2022-11-01 | 宝武碳业科技股份有限公司 | Tail gas processing apparatus of high softening point pitch production |
-
2022
- 2022-02-18 CN CN202210152144.3A patent/CN114377510A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040118783A1 (en) * | 2002-12-20 | 2004-06-24 | Exxonmobil Upstream Research Company | Integrated water treatment and flue gas desulfurization process |
| CN107227167A (en) * | 2017-07-24 | 2017-10-03 | 洛阳融惠化工科技有限公司 | A kind of use heavy solvent de-oiled asphalt produces the method and device of superhard pitch |
| US20210234147A1 (en) * | 2018-06-06 | 2021-07-29 | Kureha Corporation | Method for producing carbonaceous material for negative electrode of non-aqueous electrolyte secondary battery and production apparatus thereof |
| CN210861128U (en) * | 2019-04-19 | 2020-06-26 | 农业农村部环境保护科研监测所 | Harmless treatment system for harmful gas in livestock and poultry house |
| CN210125266U (en) * | 2019-04-29 | 2020-03-06 | 屏南时代新材料技术有限公司 | Material recovery condenser and material recovery equipment |
| CN212930022U (en) * | 2020-05-31 | 2021-04-09 | 盘锦北方沥青股份有限公司 | Tail gas treatment device in asphalt production process |
| CN217698555U (en) * | 2022-02-18 | 2022-11-01 | 宝武碳业科技股份有限公司 | Tail gas processing apparatus of high softening point pitch production |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206897093U (en) | A kind of coking plant low pressure loss gas recycling and processing device | |
| Xue et al. | Technical progress and the prospect of low‐rank coal pyrolysis in China | |
| CN102229806B (en) | Green circular economy technology with coal coking as the main part | |
| CN102585918B (en) | Technology and system for deep removal of tar in biomass gas by coupling adsorption | |
| CN105670658A (en) | System and method for treating sludge | |
| CN105665423A (en) | System and method for disposing household waste | |
| WO2021174911A1 (en) | Method for embedding waste-plastic oilification technology in garbage incineration | |
| CN217698555U (en) | Tail gas processing apparatus of high softening point pitch production | |
| CN108238706B (en) | System and process for step-by-step pyrolysis treatment of oily sludge | |
| Dai et al. | Co-pyrolysis biochar derived from sewage sludge and lignin: synergetic effect and adsorption properties | |
| CN106630529A (en) | System for generating power via pyrolytic gasification of organic sludge | |
| CN204079738U (en) | A kind of environmental protection, energy-saving sludge high temperature cabonization system | |
| CN107674691A (en) | A kind of system and method for domestic garbage resource | |
| CN104194420B (en) | A kind of junked tire pyrolysis produces the method and apparatus of carbon black having low ash content | |
| CN108568292B (en) | Method for preparing efficient adsorbent by utilizing fluidized bed gasification fly ash and industrial waste sulfuric acid | |
| CN106391673A (en) | System and method for treating household garbage | |
| CN210560258U (en) | Ethylene device burnt gas resource utilization and deep purification device | |
| WO2022067882A1 (en) | System and process of industrial continuous cracking of mixed waste plastics according to class | |
| CN114377510A (en) | Tail gas treatment device and method for high-softening-point asphalt production | |
| CN102585879A (en) | Method for processing coal-based heavy oil | |
| CN204644266U (en) | The full circulation carbonization furnace that a kind of destructive distillation is lower-grade metamorphic bituminous | |
| CN103343021A (en) | Device and method for waste heat recovery and purification of biomass gasified gas | |
| CN110776242A (en) | Waste heat drying and pyrolysis system for oil-containing sludge | |
| CN200985326Y (en) | Device for purifying and recovering tail-gas in preparing charcoal | |
| CN114409197B (en) | Coke quenching closed type drying water oil ammonia sulfur quality recovery treatment process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |