CN1380376A - Integral process for preparing acetylene by means of continuous coking of coal and plasma pyrolysis - Google Patents
Integral process for preparing acetylene by means of continuous coking of coal and plasma pyrolysis Download PDFInfo
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- CN1380376A CN1380376A CN 02102262 CN02102262A CN1380376A CN 1380376 A CN1380376 A CN 1380376A CN 02102262 CN02102262 CN 02102262 CN 02102262 A CN02102262 A CN 02102262A CN 1380376 A CN1380376 A CN 1380376A
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Abstract
The present invention adopts the external heating process to heat coal and makes coal continuously coke, so that its first-stage high-temp. pyrolyzed gas can be directly used as raw material for preparing acetylene by means of plasma pyrolysis, and its second-stage high-temp. pyrolyzed gas can be used as flow-forming gas for preparing acetylene by means of plasma pyrolysis. Said invention can utilize low energy consumption to produce acetylene and coke, and the partial high-temp. pyrolyzed gas and acetylene tail gas can be used as heating fuel for continuously coking coal.
Description
One, technical field
A kind of continuous coking of coal of the present invention and plasma pyrolysis combined process for preparing acetylene belong to Coal Chemical Industry and one-carbon chemical research field.
Two, background technology
The using plasma reactor is by coal dust direct production acetylene, the pollution problem that can fundamentally solve " three wastes ".Power consumption and calcium carbide route that the more important thing is per kilogram acetylene are suitable, and need not coke and Wingdale as raw material.The petroleum resources shortage because the coal reserves of China is quite abundant, the development Coal Chemical Industry has special significance for the development of China's chemical industry.But the direct plasma pyrolysis system acetylene of coal is because the natural characteristics of coal strengthens the difficulty that solves yield, energy consumption and long-term operation problem.At first coal is processed into the certain energy consumption of coal dust needs of suitable size distribution, and easy contaminate environment; The pulverized coal preheating difficulty needs special equipment and energy consumption with the fluidized-bed conveying; Secondly coal dust enters in the plasma high-temperature jet, will be preheating to high temperature earlier and emit volatile matter, is only then free radical reaction generation acetylene etc. takes place.This wherein a part of coal dust can not enter the plasma jet high-temperature zone, is rotated airflow centrifugal and throws to reactor wall, and being heated is clamminess forms long-pending Jiao gradually; Part coal dust part even whole unreacteds still leave the high-temperature zone and form the residual coal of high temperature and leave reaction system through chilling.To account for the total raw material share bigger for a part of coal dust in back, about 70%, on macroscopic view, just experienced first heating refrigerative thermal cycling again, consumed lot of energy in vain, and itself do not change, and system acetylene is not produced contribution.The direct plasma pyrolysis system acetylene of coal also has higher requirement to coal in addition, and plasma generator also is into gas and is added to high temperature through electric arc by low temperature and forms plasma jet.
Coal tarization is one of the effective utilization of coal and value-added main means, its product coke is the high-grade energy and the industrial raw material of industry such as metallurgy, casting, non-ferrous metal metallurgy, chemistry, and its byproduct raw gas is a main raw material of producing coal tar, coal gas and aromatic hydrocarbons Chemicals.But existing coal tar metallization processes mainly is outer heating intermittent type technology, and equipment inevitably leaks, and causes environmental pollution serious; Heavy, poor working environment that the workman works; The FU processing power is little, and investment is big, about about 1000 yuan of the burnt investment of ton; Raw gas removal process complexity, the utilization rate of waste heat extreme difference.Continuous coking is a coking new technology Russian in recent years and that Japan is developing, have continuously feeding, discharge of the coke continuously, coal segmentation pyrolysis coking, the equipment line seal does not have leakage, pollution is little, and the FU processing power is big, investment is little, and coke quality is good, pyrolysis gas can the segmentation taking-up etc. advantage, but the high temperature pyrolysis gas disposal also needs cooling detar earlier, and preheating is as coking fuel again for part, and tar carries out the separation of produced Chemicals in heating.
All have the defective of energy effective utilization rate variance separately from the direct plasma pyrolysis system acetylene of coal and continuous coking process, but the utilization of two technology energy exists complementarity.
Three, summary of the invention
Order of the present invention ground is to provide a kind of continuous coking of coal and plasma pyrolysis combined process for preparing acetylene for the deficiency that overcomes the prior art existence.
A kind of continuous coking of coal provided by the invention and plasma pyrolysis combined process for preparing acetylene are that coal is adopted outer heating continuous coking, one section rich hydrocarbon elevated temperature heat is vented one's spleen directly as the raw material of plasma pyrolysis system acetylene, two sections rich hydrogen elevated temperature heat of part are vented one's spleen as the one-tenth gas of plasma pyrolysis system acetylene, less energy-consumption ground produces acetylene and coke, and two sections elevated temperature heat of part are vented one's spleen and the heating fuel of acetylene tail gas as continuous coking of coal.
A kind of continuous coking of coal provided by the present invention and plasma pyrolysis combined process for preparing acetylene, the different steps elevated temperature heat of having utilized continuous coking of coal to produce vent one's spleen as the raw material of plasma pyrolysis system acetylene with become gas, fully, pyrolysis gas heat and quality have reasonably been utilized, the high-quality energy that also is plasma generation is able to reasonable utilization, simplified the coking process flow process, improved the added value of the coking tail gas heat quantity rate of recovery and coal, gas-phase feed helps mixing, reduce or suppressed green coke on the reactor wall, guaranteed that plasma pyrolysis continuously and long-term operation; Pyrolysis gas as raw material with become gas, processing power, transformation efficiency and acetylene yield rise significantly, refining cost of product gas and energy consumption reduce greatly; The acetylene energy consumption of whole device reduces more than 50%, approaches the energy consumption of Sweet natural gas plasma pyrolysis system acetylene.
Four, embodiment
The present invention describes with following embodiment.
Embodiment adds continuously vertical continuous coking stove with the coal 0.01MPa-0.5MPa that pressurizes with worm conveyor, and coal moves down under action of gravity.Through middle quirk preheating, softening, destructive distillation, emit one section rich hydrocarbon pyrolysis gas of 400 ℃-800 ℃.The destructive distillation semicoke continues to move up into down the high-temperature calcination of charing section and emits two sections rich hydrogen pyrolysis gas generation high temperature cokes of 1000 ℃-1300 ℃.High temperature coke enters fluid-tight quenching groove behind dry quenching(of coke), scraped and obtained coke by the scraper plate machine that discharges of the coke at last.Two sections rich hydrogen pyrolysis gas that part is 1000 ℃-1300 ℃ are introduced the plasma generator of plasma pyrolysis system acetylene as becoming gas to form the hydrogen plasma jet, one section rich hydrocarbon pyrolysis gas of 400 ℃-800 ℃ is introduced the plasma reactor of plasma pyrolysis system acetylene as pyrolysis feed, reaction generates gas and separate acetylene after Quench, two sections pyrolysis gas of acetylene tail gas and remainder act as a fuel and send into middle quirk burning from the segmentation of vertical continuous coking furnace bottom, for coal tarization provides heat.
Claims (3)
1. continuous coking of coal and plasma pyrolysis combined process for preparing acetylene, it is characterized in that be with continuous coking of coal technology and plasma pyrolysis system acetylene technology by the elevated temperature heat combination of venting one's spleen, produce acetylene and coke.
2 according to a kind of continuous coking of coal and plasma pyrolysis combined process for preparing acetylene that claim 1 provided, it is characterized in that continuous coking is that segmentation taking-up elevated temperature heat is vented one's spleen, one section rich hydrocarbon elevated temperature heat is vented one's spleen directly as the raw material of plasma pyrolysis system acetylene, two sections rich hydrogen elevated temperature heat are vented one's spleen part as the one-tenth gas of plasma pyrolysis system acetylene, the part elevated temperature heat vent one's spleen and acetylene tail gas as the heating fuel of continuous coking of coal.
3, a kind of continuous coking of coal that claim 1 provided and plasma pyrolysis combined process for preparing acetylene is characterized in that said plasma body is the direct current arc thermal plasma.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02102262A CN1117138C (en) | 2002-01-30 | 2002-01-30 | Integral process for preparing acetylene by means of continuous coking of coal and plasma pyrolysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02102262A CN1117138C (en) | 2002-01-30 | 2002-01-30 | Integral process for preparing acetylene by means of continuous coking of coal and plasma pyrolysis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1380376A true CN1380376A (en) | 2002-11-20 |
| CN1117138C CN1117138C (en) | 2003-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN02102262A Expired - Fee Related CN1117138C (en) | 2002-01-30 | 2002-01-30 | Integral process for preparing acetylene by means of continuous coking of coal and plasma pyrolysis |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106348991A (en) * | 2016-08-26 | 2017-01-25 | 西南化工研究设计院有限公司 | Method for producing acetylene by intensifying coal by virtue of plasma |
| CN106365937A (en) * | 2016-08-26 | 2017-02-01 | 西南化工研究设计院有限公司 | Production method of acetylene |
| CN113336619A (en) * | 2021-05-13 | 2021-09-03 | 华陆工程科技有限责任公司 | Method for preparing acetylene gas by using oxo-synthesis gas |
-
2002
- 2002-01-30 CN CN02102262A patent/CN1117138C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106348991A (en) * | 2016-08-26 | 2017-01-25 | 西南化工研究设计院有限公司 | Method for producing acetylene by intensifying coal by virtue of plasma |
| CN106365937A (en) * | 2016-08-26 | 2017-02-01 | 西南化工研究设计院有限公司 | Production method of acetylene |
| CN106348991B (en) * | 2016-08-26 | 2018-12-25 | 西南化工研究设计院有限公司 | A kind of production method of plasma strengthening coal acetylene |
| CN106365937B (en) * | 2016-08-26 | 2018-12-25 | 西南化工研究设计院有限公司 | A kind of production method of acetylene |
| CN113336619A (en) * | 2021-05-13 | 2021-09-03 | 华陆工程科技有限责任公司 | Method for preparing acetylene gas by using oxo-synthesis gas |
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| Publication number | Publication date |
|---|---|
| CN1117138C (en) | 2003-08-06 |
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