CN112876882A - Improved process for producing carbon black - Google Patents
Improved process for producing carbon black Download PDFInfo
- Publication number
- CN112876882A CN112876882A CN202110041144.1A CN202110041144A CN112876882A CN 112876882 A CN112876882 A CN 112876882A CN 202110041144 A CN202110041144 A CN 202110041144A CN 112876882 A CN112876882 A CN 112876882A
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- Prior art keywords
- carbon black
- combustion
- combustion chamber
- scraping
- round pipes
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/18—Flue gas recuperation
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Organic Chemistry (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
The invention provides an improved process for producing carbon black, and relates to the technical field of carbon black production processes. The improved process for producing carbon black comprises the following specific steps: s1, preparing a combustion chamber, injecting a proper amount of raw oil into a combustion pool, and placing the combustion chamber containing the raw oil into the combustion chamber; s2, penetrating a large number of round pipes in the combustion chamber, enabling a plurality of round pipes to be distributed evenly side by side, enabling two ends of the plurality of round pipes to penetrate through the combustion chamber, introducing cold water into one ends of the plurality of round pipes, connecting the other ends of the plurality of round pipes with a collecting device, and additionally arranging a valve at one end, close to a water injection port, of the plurality of round pipes; s3, the outer walls of the circular pipes are respectively sleeved with a scraping circular ring, the connecting rods are used for fixedly connecting the scraping circular rings, and a ball nut seat is fixed at the symmetrical center of the circular pipes. Through the improvement technology with simple design, the collection of the carbon black is convenient, the yield of the carbon black is improved, meanwhile, the full utilization of energy can be realized, the energy is more energy-saving and environment-friendly, and the device is worth to be widely popularized.
Description
Technical Field
The invention relates to the technical field of carbon black production processes, in particular to an improved process for producing carbon black.
Background
Carbon black, also known as carbon black, is an amorphous carbon; light, loose and extremely fine black powder, which has a very large surface area ranging from 10 to 3000m2/g, is a product of incomplete combustion or thermal decomposition of carbonaceous substances (coal, natural gas, heavy oil, fuel oil, etc.) under the condition of insufficient air; gas black, which is made of natural gas, lamp black, which is made of oil, and acetylene black, which is made of acetylene; in addition, "channel black" and "furnace black" are also included; the carbon black can be used as a black dye for manufacturing Chinese ink, printing ink, paint and the like and also used as a reinforcing agent of rubber; the structural properties of carbon black are expressed in terms of the degree of chain or grape-like aggregation among carbon black particles, and carbon black composed of aggregates composed of the size and form of the aggregates and the number of particles per aggregate is called high-structure carbon black. At present, the common oil absorption value shows structural property, the larger the oil absorption value is, the higher the carbon black structural property is, a space network channel is easy to form and is not easy to damage, the high-structure carbon black has fine particles, the net-shaped chains are tightly stacked, the specific surface area is large, the number of particles per unit mass is large, and the chain type conductive structure is favorably formed in a polymer, wherein acetylene carbon black is the best in various carbon black varieties.
The production process of the carbon black comprises a furnace method, a spraying method, a groove method, a thermal cracking method and other related methods, although the production process of the carbon black is simpler, the waste of production energy and raw materials is easily caused in the production process, the energy conservation and the environmental protection are not utilized, and the yield of the carbon black cannot be better improved.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an improved process for producing carbon black, which solves the problems that the waste of production energy and raw materials is easily caused in the production process, the energy conservation and the environmental protection are not utilized, and the yield of the carbon black cannot be better improved.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an improved process for producing carbon black comprising the specific steps of:
s1, preparing a combustion chamber, injecting a proper amount of raw oil into a combustion pool, and placing the combustion chamber containing the raw oil into the combustion chamber;
s2, penetrating a large number of round pipes in the combustion chamber, enabling a plurality of round pipes to be distributed evenly side by side, enabling two ends of the plurality of round pipes to penetrate through the combustion chamber, introducing cold water into one ends of the plurality of round pipes, connecting the other ends of the plurality of round pipes with a collecting device, and additionally arranging a valve at one end, close to a water injection port, of the plurality of round pipes;
s3, sleeving a scraping ring on the outer walls of the circular tubes, fixedly connecting the scraping rings by using a connecting rod, fixing a ball nut seat at the position of the symmetrical center of the circular tubes, sleeving the ball nut seat on the outer wall of a threaded rod penetrating through the center of the combustion chamber, and installing a driving motor on the outer wall of the combustion chamber to enable one end of the threaded rod to be fixedly connected with the output end of the driving motor;
s4, after the preparation is finished, igniting the raw oil in the combustion pool, closing a sealing door of the combustion chamber, simultaneously reserving a small ventilation opening on the combustion chamber, and supplying air through a blower, thereby providing a small amount of air for the combustion of the raw oil in the combustion pool;
s5, because the air sent into the combustion chamber by the blower in the S4 is limited, the raw oil in the combustion pool can be insufficiently combusted, so that carbon black with a certain thickness can be generated on the outer walls of the circular tubes, the combusted flame can also heat the cold water in the circular tubes while the carbon black is generated, heat exchange is facilitated, waste heat utilization is realized, the deposited carbon black can drive the threaded rod to rotate by starting the driving motor, so that the plurality of scraping circular rings are driven to scrape the outer walls of the circular tubes, and the generated carbon black can be automatically collected conveniently;
s6, a large amount of flue gas is generated after raw oil in the combustion pool is combusted, the flue gas contains a large amount of carbon monoxide which is not combusted sufficiently, the flue gas generated by combustion is collected uniformly and is led into a special combustion furnace, and sufficient oxygen is introduced to enable the flue gas to be combusted sufficiently;
s7, the heat exchange of the S6 flue gas can be carried out through the tubular heat exchanger in the transmission process, a certain amount of heating air can be provided in winter, meanwhile, the flue gas can be rapidly cooled, the safety in conveying is improved, after secondary sufficient combustion of the combustion furnace, the same waste heat utilization can be carried out, and meanwhile, a large amount of carbon dioxide and a small amount of sulfur dioxide generated by combustion can be recycled by using professional recovery equipment.
Preferably, the combustion pond in S1 is a movable combustion pond, and the combustion pond may be made of a ceramic material.
Preferably, the round pipe in the S2 is made of stainless steel, and the thickness of the round pipe is ensured to be more than 3 mm.
Preferably, in S3, the circular tubes corresponding to the plurality of scraping rings are in interference fit.
Preferably, in S3, the connecting rods may be fixedly connected to the corresponding scraping rings by welding or bolting.
Preferably, in the S5, the threaded rod can be driven by the driving motor to rotate forward and backward, so that the material scraping rings can be used for scraping material in a reciprocating manner on the outer walls of the circular tubes.
Preferably, in S6, a filtering device may be added to the flue gas collecting device, and the filtering device is used to filter out solid particles and other impurities in the flue gas, so as to prevent a large amount of impurities in the flue gas from being excessively accumulated to cause blockage of the gas transmission pipeline.
(III) advantageous effects
The present invention provides an improved process for producing carbon black. The method has the following beneficial effects:
1. the improved process for producing the carbon black adopts a hierarchical resource utilization scheme, can fully recycle a series of flue gas resources generated by burning raw oil while producing the carbon black, thereby realizing the efficient utilization of the resources, reducing the emission of greenhouse gases and protecting the environment.
2. The improved process for producing the carbon black is simple in design, not only facilitates the collection of the carbon black and improves the yield of the carbon black, but also can realize the full utilization of energy, is more energy-saving and environment-friendly, thereby greatly improving the overall operating efficiency and being worth of being widely popularized.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
the embodiment of the invention provides an improved process for producing carbon black, which comprises the following specific steps:
s1, preparing a combustion chamber, injecting a proper amount of raw oil into a combustion pool, and placing the combustion chamber containing the raw oil into the combustion chamber;
s2, penetrating a large number of round pipes in the combustion chamber, enabling a plurality of round pipes to be distributed evenly side by side, enabling two ends of the plurality of round pipes to penetrate through the combustion chamber, introducing cold water into one ends of the plurality of round pipes, connecting the other ends of the plurality of round pipes with a collecting device, and additionally arranging a valve at one end, close to a water injection port, of the plurality of round pipes;
s3, sleeving a scraping ring on the outer walls of the circular tubes, fixedly connecting the scraping rings by using a connecting rod, fixing a ball nut seat at the position of the symmetrical center of the circular tubes, sleeving the ball nut seat on the outer wall of a threaded rod penetrating through the center of the combustion chamber, and installing a driving motor on the outer wall of the combustion chamber to enable one end of the threaded rod to be fixedly connected with the output end of the driving motor;
s4, after the preparation is finished, igniting the raw oil in the combustion pool, closing a sealing door of the combustion chamber, simultaneously reserving a small ventilation opening on the combustion chamber, and supplying air through a blower, thereby providing a small amount of air for the combustion of the raw oil in the combustion pool;
s5, because the air sent into the combustion chamber by the blower in the S4 is limited, the raw oil in the combustion pool can be insufficiently combusted, so that carbon black with a certain thickness can be generated on the outer walls of the circular tubes, the combusted flame can also heat the cold water in the circular tubes while the carbon black is generated, heat exchange is facilitated, waste heat utilization is realized, the deposited carbon black can drive the threaded rod to rotate by starting the driving motor, so that the plurality of scraping circular rings are driven to scrape the outer walls of the circular tubes, and the generated carbon black can be automatically collected conveniently;
s6, a large amount of flue gas is generated after raw oil in the combustion pool is combusted, the flue gas contains a large amount of carbon monoxide which is not combusted sufficiently, the flue gas generated by combustion is collected uniformly and is led into a special combustion furnace, and sufficient oxygen is introduced to enable the flue gas to be combusted sufficiently;
s7, the heat exchange of the S6 flue gas can be carried out through the tubular heat exchanger in the transmission process, a certain amount of heating air can be provided in winter, meanwhile, the flue gas can be rapidly cooled, the safety in conveying is improved, after secondary sufficient combustion of the combustion furnace, the same waste heat utilization can be carried out, and meanwhile, a large amount of carbon dioxide and a small amount of sulfur dioxide generated by combustion can be recycled by using professional recovery equipment.
The movable combustion pool is adopted as the combustion pool in the S1, the combustion pool can be made of ceramic materials, and the movable combustion pool is adopted, so that the combustion pool can be moved out of the combustion chamber after the combustion is finished, and the subsequent collection of carbon black is facilitated.
The round pipe in S2 is made of stainless steel, the thickness of the round pipe is guaranteed to be larger than 3mm, the pipe made of stainless steel has good heat conduction performance, deposition of carbon black is facilitated, and the carbon black is collected by the scraping device more conveniently in the follow-up process.
The even pipe that corresponds of material ring is scraped to a plurality of in S3 adopts interference fit, can make a plurality of material rings of scraping can hug closely the pipe that corresponds to make a plurality of material rings of scraping can with correspond the cleaner scraping of carbon black on the pipe outer wall.
A plurality of connecting rods can adopt welding or bolt fastening 'S mode to carry out fixed connection with corresponding scraping ring in S3, carry out fixed connection through welding or bolt fastening' S mode, can realize firm fixed, also can carry out the selection of connected mode as required simultaneously to make things convenient for subsequent maintenance.
Can drive the threaded rod through driving motor in S5 and just reversing to utilize a plurality of material rings of scraping to reciprocate at the outer wall of a plurality of pipes to scrape the material, through reciprocating type scraping the material, can carry out more thorough scraping with the accumulational carbon black of pipe outer wall.
S6, a filtering device can be additionally arranged in the smoke collecting device, solid particles and other impurities in the smoke are filtered by the filtering device, and blockage of the gas transmission pipeline caused by excessive accumulation of a large amount of impurities in the smoke is prevented.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. An improved process for producing carbon black, comprising the steps of:
s1, preparing a combustion chamber, injecting a proper amount of raw oil into a combustion pool, and placing the combustion chamber containing the raw oil into the combustion chamber;
s2, penetrating a large number of round pipes in the combustion chamber, enabling a plurality of round pipes to be distributed evenly side by side, enabling two ends of the plurality of round pipes to penetrate through the combustion chamber, introducing cold water into one ends of the plurality of round pipes, connecting the other ends of the plurality of round pipes with a collecting device, and additionally arranging a valve at one end, close to a water injection port, of the plurality of round pipes;
s3, sleeving a scraping ring on the outer walls of the circular tubes, fixedly connecting the scraping rings by using a connecting rod, fixing a ball nut seat at the position of the symmetrical center of the circular tubes, sleeving the ball nut seat on the outer wall of a threaded rod penetrating through the center of the combustion chamber, and installing a driving motor on the outer wall of the combustion chamber to enable one end of the threaded rod to be fixedly connected with the output end of the driving motor;
s4, after the preparation is finished, igniting the raw oil in the combustion pool, closing a sealing door of the combustion chamber, simultaneously reserving a small ventilation opening on the combustion chamber, and supplying air through a blower, thereby providing a small amount of air for the combustion of the raw oil in the combustion pool;
s5, because the air sent into the combustion chamber by the blower in the S4 is limited, the raw oil in the combustion pool can be insufficiently combusted, so that carbon black with a certain thickness can be generated on the outer walls of the circular tubes, the combusted flame can also heat the cold water in the circular tubes while the carbon black is generated, heat exchange is facilitated, waste heat utilization is realized, the deposited carbon black can drive the threaded rod to rotate by starting the driving motor, so that the plurality of scraping circular rings are driven to scrape the outer walls of the circular tubes, and the generated carbon black can be automatically collected conveniently;
s6, a large amount of flue gas is generated after raw oil in the combustion pool is combusted, the flue gas contains a large amount of carbon monoxide which is not combusted sufficiently, the flue gas generated by combustion is collected uniformly and is led into a special combustion furnace, and sufficient oxygen is introduced to enable the flue gas to be combusted sufficiently;
s7, the heat exchange of the S6 flue gas can be carried out through the tubular heat exchanger in the transmission process, a certain amount of heating air can be provided in winter, meanwhile, the flue gas can be rapidly cooled, the safety in conveying is improved, after secondary sufficient combustion of the combustion furnace, the same waste heat utilization can be carried out, and meanwhile, a large amount of carbon dioxide and a small amount of sulfur dioxide generated by combustion can be recycled by using professional recovery equipment.
2. An improved process for the production of carbon black as claimed in claim 1 wherein: the combustion pond in S1 is a movable combustion pond, and the combustion pond may be made of a ceramic material.
3. An improved process for the production of carbon black as claimed in claim 1 wherein: the round pipe in the S2 is made of stainless steel and the thickness of the round pipe is ensured to be larger than 3 mm.
4. An improved process for the production of carbon black as claimed in claim 1 wherein: and circular pipes uniformly corresponding to the plurality of scraping circular rings in the S3 are in interference fit.
5. An improved process for the production of carbon black as claimed in claim 1 wherein: and in the S3, the connecting rods can be fixedly connected with the corresponding scraping rings in a welding or bolt fixing mode.
6. An improved process for the production of carbon black as claimed in claim 1 wherein: can drive the threaded rod through driving motor in the S5 and carry out just reversing to utilize a plurality of material rings of scraping to carry out reciprocating type scraping at the outer wall of a plurality of pipes.
7. An improved process for the production of carbon black as claimed in claim 1 wherein: s6, a filtering device can be additionally arranged in the smoke collecting device, solid particles and other impurities in the smoke are filtered by the filtering device, and blockage of the gas transmission pipeline caused by excessive accumulation of a large amount of impurities in the smoke is prevented.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110041144.1A CN112876882A (en) | 2021-01-13 | 2021-01-13 | Improved process for producing carbon black |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110041144.1A CN112876882A (en) | 2021-01-13 | 2021-01-13 | Improved process for producing carbon black |
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| Publication Number | Publication Date |
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| CN112876882A true CN112876882A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110041144.1A Pending CN112876882A (en) | 2021-01-13 | 2021-01-13 | Improved process for producing carbon black |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116221154A (en) * | 2023-04-26 | 2023-06-06 | 河南大境风机科技有限公司 | Carbon black recovery fan for pyrolysis furnace |
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| CN2167092Y (en) * | 1992-07-08 | 1994-06-01 | 抚顺化工厂 | Spray type furnace for prepn. of carbon black |
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| CN207891291U (en) * | 2018-01-05 | 2018-09-21 | 江西黑猫炭黑股份有限公司 | A kind of black reactor discharging low nitrogen flue gas |
| CN110090685A (en) * | 2019-05-07 | 2019-08-06 | 安徽陵阳新材料有限公司 | A kind of paint production dispersion grinding integration apparatus |
| CN110408242A (en) * | 2019-08-22 | 2019-11-05 | 乌海黑猫炭黑有限责任公司 | It is a kind of for efficiently producing the double-burner reacting furnace of special carbon black |
| CN209669111U (en) * | 2018-12-19 | 2019-11-22 | 嘉峪关大友嘉能化工有限公司 | A kind of pyrocarbon black smoke gas processing system |
| CN210601562U (en) * | 2019-05-17 | 2020-05-22 | 扬州石化有限责任公司 | Boiler flue gas waste heat recovery device |
| CN111637472A (en) * | 2020-06-23 | 2020-09-08 | 四川新城都锅炉有限公司 | Heat exchange system after yellow phosphorus tail gas combustion |
| CN211636524U (en) * | 2020-01-08 | 2020-10-09 | 中山飞来劲实业有限公司 | Reaction device for producing cleaning agent |
| CN111811288A (en) * | 2020-08-04 | 2020-10-23 | 朝阳黑猫伍兴岐炭黑有限责任公司 | Energy efficient carbon black production system and method |
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2021
- 2021-01-13 CN CN202110041144.1A patent/CN112876882A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2167092Y (en) * | 1992-07-08 | 1994-06-01 | 抚顺化工厂 | Spray type furnace for prepn. of carbon black |
| CN101581543A (en) * | 2009-06-17 | 2009-11-18 | 五矿（湖南）铁合金有限责任公司 | Recovering and utilizing method of energy smelted in closed electric furnace |
| CN207891291U (en) * | 2018-01-05 | 2018-09-21 | 江西黑猫炭黑股份有限公司 | A kind of black reactor discharging low nitrogen flue gas |
| CN209669111U (en) * | 2018-12-19 | 2019-11-22 | 嘉峪关大友嘉能化工有限公司 | A kind of pyrocarbon black smoke gas processing system |
| CN110090685A (en) * | 2019-05-07 | 2019-08-06 | 安徽陵阳新材料有限公司 | A kind of paint production dispersion grinding integration apparatus |
| CN210601562U (en) * | 2019-05-17 | 2020-05-22 | 扬州石化有限责任公司 | Boiler flue gas waste heat recovery device |
| CN110408242A (en) * | 2019-08-22 | 2019-11-05 | 乌海黑猫炭黑有限责任公司 | It is a kind of for efficiently producing the double-burner reacting furnace of special carbon black |
| CN211636524U (en) * | 2020-01-08 | 2020-10-09 | 中山飞来劲实业有限公司 | Reaction device for producing cleaning agent |
| CN111637472A (en) * | 2020-06-23 | 2020-09-08 | 四川新城都锅炉有限公司 | Heat exchange system after yellow phosphorus tail gas combustion |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116221154A (en) * | 2023-04-26 | 2023-06-06 | 河南大境风机科技有限公司 | Carbon black recovery fan for pyrolysis furnace |
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Application publication date: 20210601 |