CN112679997A - Double-burner novel acetylene carbon black cracking furnace - Google Patents
Double-burner novel acetylene carbon black cracking furnace Download PDFInfo
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- CN112679997A CN112679997A CN202011587090.0A CN202011587090A CN112679997A CN 112679997 A CN112679997 A CN 112679997A CN 202011587090 A CN202011587090 A CN 202011587090A CN 112679997 A CN112679997 A CN 112679997A
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Abstract
The invention discloses a novel double-furnace-head acetylene carbon black cracking furnace which comprises a furnace body, wherein the furnace body is a vertical furnace, the top of the furnace body is provided with at least two furnace heads capable of independently performing cracking reaction, each furnace head is respectively provided with an acetylene gas inlet, the upper part and the lower part of the inner cavity of the furnace body are divided into a first cooling section and a second cooling section, and a plurality of nitrogen inlets and backflow hydrogen inlets are arranged at positions, corresponding to the first cooling section, on the furnace body. The single furnace capacity of the invention can reach 2000t/a-2500t/a, which not only can solve the problems, but also can reduce the production raw material and the operation cost of acetylene black, save energy and reduce consumption, can meet the requirements of safety and environmental protection, increase the production scale and increase the investment, basically keeps the personnel unchanged, improves the economic benefit of enterprises, simultaneously meets the requirements of customers, has good social benefit, fills the blank that the single furnace capacity in China does not have a cracking furnace of more than 1000t/a, and has very important significance for improving the productivity, improving the economic benefit of enterprises, enlarging acetylene black production devices and the like.
Description
Technical Field
The invention relates to the field of acetylene black production equipment, in particular to a novel double-furnace-head acetylene black cracking furnace.
Background
Acetylene black is carbon black produced by cracking acetylene gas at 1600-1800 ℃ in the absence of air. At present, the production scale of the cracking furnace of the domestic acetylene carbon black plant is also 500-1000t/a, the equipment is developed in the beginning of 80 years, although the equipment meets the market demand to a greater extent, the cost of raw material acetylene gas accounts for more than 80% of the cost of acetylene carbon black for a long time, the yield is low, and the labor cost is high. With the technological progress, customers urgently need a cracking furnace which is large in scale, energy-saving, environment-friendly and synergistic. At present: no single-furnace cracking furnace with the production capacity more than 1000t/a or double-furnace-head acetylene carbon black cracking furnace exists in China. The conventional cracking furnace has the following limitations due to the cracking heat:
limitation of single furnace capability: because a large amount of heat released by acetylene gas cracking is difficult to remove, the capacity of a single furnace is generally difficult to enlarge, a 1000t/a water jacket type cracking furnace needs quite large cooling soft water, if the scale is enlarged to be greater than or equal to 2000t/a, the water temperature of the water jacket at the furnace end is overhigh and easy to gasify, after 1 time of acetylene gas amount is increased, the concentration of acetylene carbon black smoke generated by acetylene gas cracking is overhigh, the amount of aerosol is large, coking is serious, coke particles are large, the product quality is poor, and meanwhile, the production running cost and investment are multiplied.
The conventional cracking furnace adopts acetylene gas to crack to produce acetylene black, the acetylene carbon black is greatly influenced by acetylene gas (calcium carbide), the cost of raw material acetylene gas accounts for more than 80% of the cost of the acetylene black for a long time, the yield is low, and the labor cost is high.
The acetylene black cracking furnaces in China are single furnaces, one cracking furnace is arranged in one production line, the production capacity is 1000t/a, 2 or 8 production lines are needed if 2000t/a or 8000t/a is achieved, the production lines need to be increased when the scale is enlarged, and the investment is huge.
Disclosure of Invention
Aiming at the problems, the invention provides a novel double-furnace-head acetylene carbon black cracking furnace, the single-furnace capacity can reach 2000t/a-2500t/a, the problems can be well solved, the acetylene carbon black production raw material and operation cost can be reduced, the energy is saved, the consumption is reduced, the requirements of safety and environmental protection can be met, the production scale is increased, the investment is increased, the personnel are basically unchanged, the enterprise economic benefit is improved, meanwhile, the client requirement is met, the social benefit is good, the blank that the domestic single-furnace capacity does not have the cracking furnace with more than 1000t/a is filled, and the acetylene carbon black cracking furnace has very important significance for improving the productivity, improving the enterprise economic benefit, enlarging the acetylene carbon black production device and the like.
The technical scheme of the invention is as follows:
the utility model provides a novel acetylene carbon black pyrolysis furnace of two furnace heads, includes the furnace body, the furnace body is vertical furnace, the top of furnace body is equipped with two at least furnace heads that can independently carry out the pyrolysis reaction, every be equipped with acetylene gas import on the furnace head respectively, the inner chamber of furnace body divide into first cooling zone and second cooling zone from top to bottom, the position that corresponds first cooling zone on the furnace body is equipped with a plurality of nitrogen gas imports and flows back the hydrogen import.
The working principle of the technical scheme is as follows:
the double-furnace-head novel acetylene carbon black cracking furnace disclosed by the invention has the advantages that the two furnace heads are adopted for simultaneously cracking acetylene gas to produce the acetylene carbon black, the carbon black flue gas enters a set of cooling and collecting system, the quality of the acetylene carbon black is not changed, one production line forms the production capacity of the original two production lines, the investment and the electric energy are saved, the energy is saved, the efficiency is increased by more than 25%, the yield of a single furnace can be increased by more than 2 times, the cost of each ton of acetylene carbon black is reduced by about 20% (more than 1000 yuan), if 5000t/a is produced every year, the economic benefit can be increased by more than 500 ten. The invention creatively solves the problems of cracking heat and coking, breaks the bottleneck restricting the single furnace capability, fills the blank that the single furnace capability in China does not have a cracking furnace with more than 1000t/a, and has very important significance for improving the productivity, improving the economic benefit of enterprises, enlarging acetylene black production devices and the like.
In a further technical scheme, water jackets are respectively arranged on the outer walls of the furnace body and each furnace end.
In a further technical scheme, the furnace body and the water jackets of the furnace ends are respectively provided with a cooling water outlet, at least two furnace ends are communicated with the water jackets on the furnace body, and the at least two furnace ends and the water jackets on the furnace body share one cooling water inlet.
In a further technical scheme, the number of the furnace ends is 2 or more than 2.
In a further technical scheme, thermocouple interfaces are respectively arranged at positions on the furnace body corresponding to the first cooling section and the second cooling section.
In a further technical scheme, an explosion-proof opening is formed in the furnace body.
In a further technical scheme, a water jacket at a position close to a flue gas outlet of the furnace body is provided with a clean discharge port.
The invention has the beneficial effects that:
the double-furnace-head novel acetylene carbon black cracking furnace disclosed by the invention has the advantages that the two furnace heads are adopted for simultaneously cracking acetylene gas to produce the acetylene carbon black, the carbon black flue gas enters a set of cooling and collecting system, the quality of the acetylene carbon black is not changed, one production line forms the production capacity of the original two production lines, the investment and the electric energy are saved, the energy is saved, the efficiency is increased by more than 25%, the yield of a single furnace can be increased by more than 2 times, the cost of each ton of acetylene carbon black is reduced by about 20% (more than 1000 yuan), if 5000t/a is produced every year, the economic benefit can be increased by more than 500 ten. The invention creatively solves the problems of cracking heat and coking, breaks the bottleneck restricting the single furnace capability, fills the blank that the single furnace capability in China does not have a cracking furnace with more than 1000t/a, and has very important significance for improving the productivity, improving the economic benefit of enterprises, enlarging acetylene black production devices and the like.
Drawings
FIG. 1 is a schematic structural diagram of a double-burner acetylene black carbon cracking furnace according to an embodiment of the invention.
Description of reference numerals:
1. a furnace body; 2. a furnace end; 3. an acetylene gas inlet; 4. a water jacket; 5. a cooling water inlet; 6. a cooling water outlet; 7. a thermocouple interface; 8. a nitrogen inlet; 9. a reflux hydrogen inlet; 10. an explosion-proof port; 11. a flue gas outlet; 12. putting a clean mouth; 13. a cracking reaction section; 14. a first cooling section; 15. and a second cooling section.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings.
Example (b):
as shown in fig. 1, a novel acetylene carbon black cracking furnace with double furnace heads, including furnace body 1, furnace body 1 is a vertical furnace, the top of furnace body 1 is equipped with two furnace heads 2 that can independently carry out the cracking reaction, 2 inlayer linings of every furnace head are with the graphite brick, be equipped with acetylene gas import 3 on every furnace head 2 respectively, the inner chamber of furnace body 1 divide into first cooling zone 14 and second cooling zone 15 from top to bottom, the position that corresponds first cooling zone 14 on furnace body 1 is equipped with a plurality of nitrogen gas import 8 and a plurality of backward flow hydrogen import 9, regard nitrogen gas and backward flow hydrogen as coolant.
In this embodiment, the outer walls of the furnace body 1 and the two burners 2 are respectively provided with a water jacket 4, each water jacket 4 is respectively provided with a cooling water outlet 6, the two burners 2 are communicated with the water jackets 4 on the furnace body 1, and the two burners 2 and the water jackets 4 on the furnace body 1 share a cooling water inlet 5.
In this embodiment, thermocouple connectors 7 are respectively disposed on the furnace body 1 at positions corresponding to the first cooling section 14 and the second cooling section 15.
In this embodiment, the furnace body 1 is provided with an explosion vent 10.
In this embodiment, a water jacket near the flue gas outlet 11 of the furnace body 1 is provided with a clean discharge port 12.
After the single furnace is implemented, the production capacity of the single furnace is 2500t/a, the two furnace ends 2 are respectively heated to about 800 ℃ by a combustion method, acetylene gas is respectively added to the two furnace ends 2 to rapidly heat to about 1200 ℃, air is cut off, a large amount of acetylene gas is introduced to carry out cracking reaction, the temperature, the pressure and the flow of the two furnace ends 2 are required to be basically consistent, and the acetylene gas from the acetylene gas main pipe to the two furnace ends 2 is respectively an independent system.
The two furnace ends are respectively internally provided with a cracking reaction section 13, a hydraulic cylinder transmission device is arranged outside the furnace, a scraper and an acetylene gas nozzle coke poking device are arranged in the furnace, the furnace is driven by the hydraulic cylinder transmission device to reciprocate up and down to scrape off carbon black agglomerated on the furnace wall and poke off coke blocks formed at the head part of the acetylene gas nozzle, the scraper and the acetylene gas nozzle are both provided with water cooling jackets for cooling, and the scraper device and a gas gun are expanded to be matched with 1300 t/a. In order to prevent the acetylene black from graphitizing due to over-temperature, the furnace temperature is preferably kept at about 1600-1800 ℃. The furnace temperature is too high, and the product performance is reduced; too low a furnace temperature may in turn stop the cracking reaction.
The cooling structure of the cracking furnace is enlarged and improved, a thermocouple is arranged at the section for measuring temperature, a nitrogen inlet and a backflow hydrogen inlet are protected, and the amount of a cooling medium is adjusted by controlling the temperature of an outlet of the cracking furnace according to the furnace pressure when acetylene gas is constant, so that the purposes of flame-stopping cooling, stopping carbon black reaction, diluting carbon black concentration and preventing coking are achieved.
The double-furnace-head cracking furnace has the advantages that the furnace cavity volume of the cooling section of the double-furnace-head cracking furnace is enlarged, the heat load is increased, the heat exchange area of the cooling section is enlarged, and the volume is 3000t/a load.
The tail part of the cracking furnace is provided with a thermocouple for measuring the temperature, the section is a staying space for cooling and diluting the carbon black concentration, and the carbon black concentration is cooled and diluted under the action of the backflow hydrogen or the cooling nitrogen, so that the coking is reduced, and the transportation is convenient.
The acetylene gas synchronous cracking is carried out by adopting two furnace ends which are independent from each other, so that the coking amount of the acetylene black can be well controlled, and the quality of the acetylene black is ensured.
The circulating water quantity of each water jacket is increased according to the temperature, and the temperature is controlled to prevent a water cannon from being hit.
The rear system of the double-furnace-head cracking furnace adopts the equipment of the original production line, and the yield is improved from 3.5-4 tons/day to 7-8 tons/day.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (7)
1. The utility model provides a novel acetylene carbon black pyrolysis furnace of two furnace heads, includes the furnace body, its characterized in that, the furnace body is vertical furnace, the top of furnace body is equipped with two at least furnace heads that can independently carry out the pyrolysis reaction, every be equipped with the acetylene gas import on the furnace head respectively, the inner chamber of furnace body divide into first cooling zone and second cooling zone from top to bottom, the position that corresponds first cooling zone on the furnace body is equipped with a plurality of nitrogen gas imports and backward flow hydrogen import.
2. The acetylene carbon black cracking furnace with two furnace heads as claimed in claim 1, wherein the outer walls of the furnace body and each furnace head are respectively provided with a water jacket.
3. The double-burner acetylene carbon black cracking furnace according to claim 2, wherein the furnace body and the water jacket of each burner are respectively provided with a cooling water outlet, at least two burners are communicated with the water jacket on the furnace body, and at least two burners and the water jacket on the furnace body share one cooling water inlet.
4. The double-burner novel acetylene carbon black cracking furnace according to claim 1, wherein the number of the burners is 2.
5. The double-burner acetylene carbon black cracking furnace according to claim 1, wherein thermocouple interfaces are respectively arranged at positions on the furnace body corresponding to the first cooling section and the second cooling section.
6. The double-burner acetylene carbon black cracking furnace according to claim 1, wherein the furnace body is provided with an explosion-proof opening.
7. The double-burner acetylene carbon black cracking furnace according to claim 1, wherein a clean discharge port is arranged on a water jacket at a position on the furnace body close to the flue gas outlet.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316634A (en) * | 2021-12-15 | 2022-04-12 | 焦作市和兴化学工业有限公司 | Preparation method of high-structure acetylene carbon black |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611962A (en) * | 1979-07-03 | 1981-02-05 | Air Liquide | Carbon black manufacturing method and apparatus |
| CN103205140A (en) * | 2013-05-06 | 2013-07-17 | 中橡集团炭黑工业研究设计院 | Cracking furnace for producing thermal decomposition process carbon black |
| CN103333529A (en) * | 2013-05-06 | 2013-10-02 | 中橡集团炭黑工业研究设计院 | Apparatus for producing carbon black through thermal cracking method |
| CN203295422U (en) * | 2013-05-06 | 2013-11-20 | 中橡集团炭黑工业研究设计院 | Cracking furnace for producing carbon black by hot cracking method |
| CN203295421U (en) * | 2013-05-06 | 2013-11-20 | 中橡集团炭黑工业研究设计院 | Device for producing carbon black by hot cracking method |
| CN203947055U (en) * | 2014-04-21 | 2014-11-19 | 唐山黑猫炭黑有限责任公司 | A kind of annual output 6 Wan Dun hard (carbon) black double combustion chamber Reaktionsofens |
| CN105647242A (en) * | 2016-04-07 | 2016-06-08 | 青岛黑猫炭黑科技有限责任公司 | Reaction furnace for preparing carbon black with ultra-wide aggregate distribution and preparation method of reaction furnace |
| CN205382115U (en) * | 2016-02-16 | 2016-07-13 | 中橡集团炭黑工业研究设计院 | But dilatation shawinigan black pyrolysis furnace |
| CN205501179U (en) * | 2016-04-07 | 2016-08-24 | 青岛黑猫炭黑科技有限责任公司 | Prepare reacting furnace of super wide aggregate distribution carbon black |
| CN205953906U (en) * | 2016-08-29 | 2017-02-15 | 山东联科新材料股份有限公司 | Apparatus for producing of high performance low consumption carbon black |
| CN206457446U (en) * | 2017-01-23 | 2017-09-01 | 喀什德力克石油工程技术有限公司 | A kind of atomization system and carbon black production system for being used to produce carbon black |
| CN109233351A (en) * | 2018-10-24 | 2019-01-18 | 中昊黑元化工研究设计院有限公司 | Mixed gas circuit line acetylene carbon black pyrolysis furnace |
| CN109370268A (en) * | 2018-10-24 | 2019-02-22 | 中昊黑元化工研究设计院有限公司 | Mixed gas expands the production technology of acetylene carbon black single line production capacity |
| CN109825115A (en) * | 2019-04-09 | 2019-05-31 | 云南云维飞虎化工有限公司 | A kind of reacting furnace preparing high-purity environmentally-friecarbon carbon black |
| CN109971217A (en) * | 2017-12-27 | 2019-07-05 | Oci有限公司 | Carbon black manufacturing device and nozzle head |
| CN210085342U (en) * | 2019-05-30 | 2020-02-18 | 张海达 | Multifunctional natural gas carbon black reactor |
| CN210656768U (en) * | 2019-08-22 | 2020-06-02 | 乌海黑猫炭黑有限责任公司 | Double-furnace-head reaction furnace for efficiently producing special carbon black |
| CN111569783A (en) * | 2020-05-15 | 2020-08-25 | 焦作市和兴化学工业有限公司 | Method for improving furnace inner wall coking in acetylene carbon black cracking production |
-
2020
- 2020-12-28 CN CN202011587090.0A patent/CN112679997A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5611962A (en) * | 1979-07-03 | 1981-02-05 | Air Liquide | Carbon black manufacturing method and apparatus |
| CN103205140A (en) * | 2013-05-06 | 2013-07-17 | 中橡集团炭黑工业研究设计院 | Cracking furnace for producing thermal decomposition process carbon black |
| CN103333529A (en) * | 2013-05-06 | 2013-10-02 | 中橡集团炭黑工业研究设计院 | Apparatus for producing carbon black through thermal cracking method |
| CN203295422U (en) * | 2013-05-06 | 2013-11-20 | 中橡集团炭黑工业研究设计院 | Cracking furnace for producing carbon black by hot cracking method |
| CN203295421U (en) * | 2013-05-06 | 2013-11-20 | 中橡集团炭黑工业研究设计院 | Device for producing carbon black by hot cracking method |
| CN203947055U (en) * | 2014-04-21 | 2014-11-19 | 唐山黑猫炭黑有限责任公司 | A kind of annual output 6 Wan Dun hard (carbon) black double combustion chamber Reaktionsofens |
| CN205382115U (en) * | 2016-02-16 | 2016-07-13 | 中橡集团炭黑工业研究设计院 | But dilatation shawinigan black pyrolysis furnace |
| CN205501179U (en) * | 2016-04-07 | 2016-08-24 | 青岛黑猫炭黑科技有限责任公司 | Prepare reacting furnace of super wide aggregate distribution carbon black |
| CN105647242A (en) * | 2016-04-07 | 2016-06-08 | 青岛黑猫炭黑科技有限责任公司 | Reaction furnace for preparing carbon black with ultra-wide aggregate distribution and preparation method of reaction furnace |
| CN205953906U (en) * | 2016-08-29 | 2017-02-15 | 山东联科新材料股份有限公司 | Apparatus for producing of high performance low consumption carbon black |
| CN206457446U (en) * | 2017-01-23 | 2017-09-01 | 喀什德力克石油工程技术有限公司 | A kind of atomization system and carbon black production system for being used to produce carbon black |
| CN109971217A (en) * | 2017-12-27 | 2019-07-05 | Oci有限公司 | Carbon black manufacturing device and nozzle head |
| CN109233351A (en) * | 2018-10-24 | 2019-01-18 | 中昊黑元化工研究设计院有限公司 | Mixed gas circuit line acetylene carbon black pyrolysis furnace |
| CN109370268A (en) * | 2018-10-24 | 2019-02-22 | 中昊黑元化工研究设计院有限公司 | Mixed gas expands the production technology of acetylene carbon black single line production capacity |
| CN109825115A (en) * | 2019-04-09 | 2019-05-31 | 云南云维飞虎化工有限公司 | A kind of reacting furnace preparing high-purity environmentally-friecarbon carbon black |
| CN210085342U (en) * | 2019-05-30 | 2020-02-18 | 张海达 | Multifunctional natural gas carbon black reactor |
| CN210656768U (en) * | 2019-08-22 | 2020-06-02 | 乌海黑猫炭黑有限责任公司 | Double-furnace-head reaction furnace for efficiently producing special carbon black |
| CN111569783A (en) * | 2020-05-15 | 2020-08-25 | 焦作市和兴化学工业有限公司 | Method for improving furnace inner wall coking in acetylene carbon black cracking production |
Non-Patent Citations (1)
| Title |
|---|
| 《消防手册》译审委员会译: "《消防手册 第16版 中》", 30 September 1990, 知识出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114316634A (en) * | 2021-12-15 | 2022-04-12 | 焦作市和兴化学工业有限公司 | Preparation method of high-structure acetylene carbon black |
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