CN101045193A - Drytype process for purifying tail gas from calcium carbide production furnace - Google Patents
Drytype process for purifying tail gas from calcium carbide production furnace Download PDFInfo
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- CN101045193A CN101045193A CNA200610169145XA CN200610169145A CN101045193A CN 101045193 A CN101045193 A CN 101045193A CN A200610169145X A CNA200610169145X A CN A200610169145XA CN 200610169145 A CN200610169145 A CN 200610169145A CN 101045193 A CN101045193 A CN 101045193A
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- tail gas
- dedusting
- calcium carbide
- dust
- cooling
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Coke Industry (AREA)
Abstract
A dry technology for cleaning the tail gas of calcium carbide furnace includes such steps as cooling and dusting by two0class cyclone unit, dusting by cloth bag filter, recovering the dust via enclosed scraper conveyer under protection of N2, and reclaiming the cleaned tail gas.
Description
One, technical field: the invention belongs to calcium carbide stove exhaust cleaning process technology field, relate in particular to a kind of dry purification process of calcium carbide stove exhaust.
Two, technical background: closed calcium carbide furnace is extensive use at home and abroad, but its tail gas clean-up is puzzlement people's a difficult problem always.At present mainly contain two kinds of dry cleaning and wet cleanings at the purification of closed calcium carbide furnace tail gas.Wet cleaning in use needs a large amount of water sources, and energy resource consumption is big, easily brings secondary pollution.The dry cleaning method is owing to contain a large amount of tar ingredients in the tail gas, dust viscosity is big, easy blocking pipe and equipment, exhaust temperature is wayward, contain 85% CO gas in the tail gas, it belongs to flammable explosive gas, and equipment and personnel are all existed potential safety hazard, and the inside and outside dry cleaning method Processes and apparatus that adopts in native land all can't normally use.
Three, summary of the invention:
The objective of the invention is to develop a kind of new Drytype process for purifying tail gas from calcium carbide production furnace at the prior art above shortcomings, it can effectively overcome the deficiency in the existing dry purification process, and the tail gas dust after the purification can reach 50mg/Nm
3Below, can be with 95% tail gas recycle utilization, the main component in the tail gas is CO, its calorific value can reach 13000KJ/Nm
3More than, turn waste into wealth, better economic and social benefit are arranged.
Technical scheme is: calcium carbide is at high temperature to make in the furnace of calcium carbide internal reaction with calcium oxide and coke when producing, and also will produce a large amount of CO gas and a spot of CO simultaneously
2, H
2, CH
4Deng gas, the dust of reaction medium in addition, the about 400Nm of the growing amount of tail gas
3/ ton calcium carbide, the temperature of these tail gas is about 500～800 ℃, the about 150g/Nm of dust content
3The technological process of Drytype process for purifying tail gas from calcium carbide production furnace of the present invention is two stage cyclone cooling and dedusting, cloth envelop collector dedusting, cleaning of off-gas is recycled, and the dust after two stage cyclone cooling and dedusting and the processing of cloth envelop collector dedusting two-step is transported to the dust warehouse with the closed chain mat machine and reclaims; Its process conditions are that the tail gas cooling exhaust temperature of two stage cyclone cooling and dedusting is 220～250 ℃, and the exhaust temperature in the cloth envelop collector dedusting is 220～250 ℃, and the closed chain mat machine is carried in the dust and charged into nitrogen protection.Technology of the present invention all realizes in airtight, explosion-proof, airtightly in the course of conveying of gas, do not reveal exactly, explosion-proof is exactly to prevent explode when sneaking into more oxygen damage equipment and jeopardize the person of these flammable explosive gas, and charging into nitrogen also is an explosion-proof measure.The two stage cyclone cooling and dedusting is the process of the tail gas in the calcium carbide production being carried out twice cooling and dedusting with whirlwind cooling and dedusting device under the cooling effect of Cryogenic air, the effect of this operation is that the big dust particle in the calcium carbide tail gas is reclaimed through the whirlwind sedimentation separation, and simultaneously tail gas is cooled off exhaust temperature and reduce to 220～250 ℃.Have only calcium carbide tail gas is cooled to 220～250 ℃, just can enter and carry out dust removal by filtration in the cloth envelop collector, this is a technological core of the present invention.Owing to contain a large amount of tar in the calcium carbide tail gas, it will condensation and blocking pipe when being lower than 200 ℃, and it will damage cloth envelop collector and Fan Equipment when surpassing 250 ℃, this temperature controlling is exactly a core of the present invention, also being that the applicant studies for many years and draws, also is the technology barrier that existing calcium carbide tail gas dry purification process fails to overcome solution.The application of heat device heated up when temperature was lower than 220 ℃ during as the cloth bag dust removal by filtration.The cooling blower of whirlwind cooling and dedusting device adopts variable frequency regulating speed control, and the exhaust temperature of controlling calcium carbide tail gas with the flow of regulating the cooling air is 220～250 ℃.The cloth envelop collector dedusting is that the temperature after preceding operation is handled is 220～250 ℃ calcium carbide tail gas carries out dust removal by filtration under 220～250 ℃ with cloth envelop collector a process.Remove through the dust major part that this operation is handled in the thick calcium carbide tail gas; reach the discharge standard of national environmental protection fully; the directly emptying or recycle of these cleaning of off-gas; owing to contain a large amount of fuel gas in the tail gas; the calorific value height, it can be used for gas burning lime kiln, heating boiler, raw material of wood-charcoal oven dry etc.Dust after two stage cyclone cooling and dedusting and the processing of cloth envelop collector dedusting two-step easily is deposited on pipeline and blocking pipe, so need carry dust to reclaim to the dust warehouse with the closed chain mat machine.Also available computers control of the detection of temperature control and nitrogen adding and airtight performance.
Technology of the present invention is simple, and equipment investment is little, can effectively calcium carbide tail gas be turned waste into wealth, and equipment is safe and reliable to operation, and better economic and environmental benefit are arranged.
Four, the specific embodiment:
Embodiment one: power taking stone tail gas is through the two stage cyclone cooling and dedusting; with cold air as cooling medium; with twice cooling and dedusting of whirlwind cooling and dedusting device; when making the temperature of its calcium carbide tail gas drop to 220 ℃; be drained into again and in the time of 220 ℃, carry out dust removal by filtration in the cloth envelop collector; cleaning of off-gas after filtering is used for heating after with the booster fan supercharging, and the dust of recovery is transported to the dust warehouse with the closed chain mat machine under the nitrogen protection condition and reclaims charging into.
Embodiment two: power taking stone tail gas is through twice whirlwind cooling and dedusting device cooling and dedusting; when the temperature for the treatment of calcium carbide tail gas drops to 250 ℃; enter again and in the time of 250 ℃, carry out dust removal by filtration in the cloth envelop collector; cleaning of off-gas after the filtration directly enters in the air; through two stage cyclone cooling and dedusting and cloth envelop collector dedusting, the dust that two-step reclaims is transported to the recovery of dust warehouse with the closed chain mat machine charging under the nitrogen protection condition.
Claims (1)
1. Drytype process for purifying tail gas from calcium carbide production furnace, the technological process that it is characterized in that it is two stage cyclone cooling and dedusting, cloth envelop collector dedusting, cleaning of off-gas recycling, and the dust after two stage cyclone cooling and dedusting and the processing of cloth envelop collector dedusting two-step is transported to the dust warehouse with the closed chain mat machine and reclaims; Its process conditions are that the exhaust temperature of two stage cyclone cooling and dedusting is 220～250 ℃, and the exhaust temperature in the cloth envelop collector dedusting is 220～250 ℃, and the closed chain mat machine is carried in the dust and charged into nitrogen protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610169145XA CN100444932C (en) | 2006-12-18 | 2006-12-18 | Drytype process for purifying tail gas from calcium carbide production furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200610169145XA CN100444932C (en) | 2006-12-18 | 2006-12-18 | Drytype process for purifying tail gas from calcium carbide production furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101045193A true CN101045193A (en) | 2007-10-03 |
| CN100444932C CN100444932C (en) | 2008-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200610169145XA Expired - Fee Related CN100444932C (en) | 2006-12-18 | 2006-12-18 | Drytype process for purifying tail gas from calcium carbide production furnace |
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| CN (1) | CN100444932C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188870A (en) * | 2010-03-12 | 2011-09-21 | 上海西重所重型机械成套有限公司 | Precise dedusting technology of coal-made acetylene gas |
| CN102258923A (en) * | 2011-04-29 | 2011-11-30 | 青海宜化化工有限责任公司 | Method for recycling and reusing tail gas of calcium carbide furnace |
| CN102382689A (en) * | 2011-08-09 | 2012-03-21 | 中国天辰工程有限公司 | Positive-pressure dry dust removing and purifying method for calcium carbide furnace gas |
| CN102654357A (en) * | 2012-05-17 | 2012-09-05 | 五冶集团成都节能工程技术服务有限公司 | Tail gas recycling system for calcium carbide furnace and application method thereof |
| CN102701203A (en) * | 2012-05-08 | 2012-10-03 | 鹤壁煤电股份有限公司电石厂 | Cooling water belt pressure circulation new process for calcium carbide furnace |
| CN102719280A (en) * | 2012-07-10 | 2012-10-10 | 内蒙古宜化化工有限公司 | Calcium carbide furnace gas purifying method |
| CN109647119A (en) * | 2018-12-06 | 2019-04-19 | 安徽华塑股份有限公司 | It is a kind of for improving the production technology of calcium carbide stove exhaust comprehensive utilization ratio |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104515405A (en) * | 2013-09-30 | 2015-04-15 | 宁夏嘉翔自控技术有限公司 | Electrical automatic control system of calcium carbide furnace tail gas purifying system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1019746B (en) * | 1989-11-21 | 1992-12-30 | 江苏工学院 | Dry purification method of furnace gas |
| CN1259537C (en) * | 2002-06-07 | 2006-06-14 | 戴若 | Semi-closed tailgas cleaning technology for calcium carbide roaster |
-
2006
- 2006-12-18 CN CNB200610169145XA patent/CN100444932C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102188870A (en) * | 2010-03-12 | 2011-09-21 | 上海西重所重型机械成套有限公司 | Precise dedusting technology of coal-made acetylene gas |
| CN102258923A (en) * | 2011-04-29 | 2011-11-30 | 青海宜化化工有限责任公司 | Method for recycling and reusing tail gas of calcium carbide furnace |
| CN102382689A (en) * | 2011-08-09 | 2012-03-21 | 中国天辰工程有限公司 | Positive-pressure dry dust removing and purifying method for calcium carbide furnace gas |
| CN102382689B (en) * | 2011-08-09 | 2013-12-11 | 中国天辰工程有限公司 | Positive-pressure dry dust removing and purifying method for calcium carbide furnace gas |
| CN102701203A (en) * | 2012-05-08 | 2012-10-03 | 鹤壁煤电股份有限公司电石厂 | Cooling water belt pressure circulation new process for calcium carbide furnace |
| CN102654357A (en) * | 2012-05-17 | 2012-09-05 | 五冶集团成都节能工程技术服务有限公司 | Tail gas recycling system for calcium carbide furnace and application method thereof |
| CN102719280A (en) * | 2012-07-10 | 2012-10-10 | 内蒙古宜化化工有限公司 | Calcium carbide furnace gas purifying method |
| CN109647119A (en) * | 2018-12-06 | 2019-04-19 | 安徽华塑股份有限公司 | It is a kind of for improving the production technology of calcium carbide stove exhaust comprehensive utilization ratio |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100444932C (en) | 2008-12-24 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Inner Mongolia Junzheng Chemical Co., Ltd. Assignor: Dongsheng Chemical Co., Ltd., Qinghai Province Contract fulfillment period: 2009.1.15 to 2017.1.15 contract change Contract record no.: 2009150000035 Denomination of invention: Drytype process for purifying tail gas from calcium carbide production furnace Granted publication date: 20081224 License type: Exclusive license Record date: 20091229 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.1.15 TO 2017.1.15; CHANGE OF CONTRACT Name of requester: INNER MENGGU JUNZHENG CHEMICAL INDUSTRY CO., LTD Effective date: 20091229 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 Termination date: 20141218 |
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| EXPY | Termination of patent right or utility model |