CN101492256A - Method for directly burning calcium carbide furnace gas to manufacture lime by using rotary kiln - Google Patents
Method for directly burning calcium carbide furnace gas to manufacture lime by using rotary kiln Download PDFInfo
- Publication number
- CN101492256A CN101492256A CNA2009100257077A CN200910025707A CN101492256A CN 101492256 A CN101492256 A CN 101492256A CN A2009100257077 A CNA2009100257077 A CN A2009100257077A CN 200910025707 A CN200910025707 A CN 200910025707A CN 101492256 A CN101492256 A CN 101492256A
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- China
- Prior art keywords
- furnace gas
- rotary kiln
- gas
- furnace
- calcium carbide
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- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a method for directly burning furnace gas of a calcium carbide furnace to produce lime by using a rotary kiln, which comprises the following steps: extracting the furnace gas from the closed calcium carbide furnace by using a high temperature blower, directly conveying the furnace gas after two-stage cyclone dust removal into a burning nozzle for spraying the furnace gas into a combustion chamber, directly burning the furnace gas and air blown by the blower in a buffer cooler after the furnace gas and the air are contacted, guiding the generated high-temperature fuel gas to enter the rotary kiln through a kiln hood and enter a raw material preheating barn from the kiln tail of the rotary kiln to preheat limestone, and discharging waste gas after dust removal to the atmosphere through a chimney. The method has simplified process and simple equipment, reduces installing capacity by more than 30 percent, and can reduce investment cost by more than 40 percent.
Description
One, technical field
The present invention relates to metallurgy, chemical field, specifically is a kind ofly to utilize rotary kiln that the furnace gas that produces in the furnace of calcium carbide production process is directly burnt to produce the method for lime.
Two, background technology
In very long one period from now on, existing carbide acetylene method production technique still can be occupied crucial status in the industries such as PVC, PVA of China's chemical field, so calcium carbide is in great demand.And scope of the enterprise is generally less in the calcium carbide manufacturing enterprise of present China, open stove, semi closed stove or internal combustion type stove still occupy the half of the country, calcium carbide burner gas does not utilize, but through directly emptying after the simple and easy dedusting, this processing mode is not only wasted also contaminate environment of resource, does not meet the Energy policy of country and the thinking of development of recycling economy.
Progressively carry out also having some enterprises that calcium carbide burner gas is utilized again under the call of saving energy, lowering energy consumption and reducing pollutants discharge in business circles, the main method of these calcium carbide burner gas utilizations is: 1. produce steam by waste heat boiler burning back.2. purify production downstream, back Chemicals.3. produce lime.Their limitation scale enterprise and large vol type of furnaces do not have application prospect on the medium-sized and small enterprises and the medium and small type of furnace.Wherein utilize calcium carbide burner gas to produce lime, be mostly, obtained using more widely, but the excessive shortcoming of shaft furnace investment is not suitable for promoting on the medium and small type of furnace with the shaft furnace mode of production.
Three, summary of the invention
It is simple that technical problem to be solved by this invention provides a kind of processing step, and the directly burning calcium carbide furnace gas that utilizes that facility investment is few is produced the method for lime.
A kind of method of utilizing rotary kiln directly burning calcium carbide furnace gas to be produced lime of the present invention, may further comprise the steps: utilize high-temperature blower in airtight furnace of calcium carbide, to extract furnace gas out, furnace gas is directly sent into the burning nozzle and is sprayed into the combustion chamber after the two stage cyclone dedusting, furnace gas contacts directly burning of back with air in the buffering water cooler that gas blower blasts in the combustion chamber, the high-temperature fuel gas that produces enters rotary kiln by the kiln hood cover, from the incoming stock preheating of the kiln tail storehouse preheating Wingdale of rotary kiln, waste gas enters atmosphere through after the dedusting by chimney.
Above-mentioned burning nozzle is big latus rectum reducing nozzle, utilizes jet current principle that the electric furnace furnace gas is injected in the combustion chamber.Above-mentioned preheating storehouse is a monomer preheating storehouse.
The present invention has adopted the production technique of optimizing, and the furnace gas that furnace of calcium carbide is produced directly imports rotary kiln burning generation heat energy production lime, and prior art has the following advantages relatively:
1, calcium carbide burner gas is without cooling (associated conduit is done insulation and handled), and spontaneous combustion when utilizing its high temperature and air mixed does not need special portfire.
2, adopt big latus rectum reducing nozzle, utilize jet current principle that the electric furnace furnace gas is injected in the combustion chamber.Nozzle adopts plain carbon stool liner high temperature mould material.
3, because the nozzle latus rectum is big, can not stopped up, so the electric furnace furnace gas need not do further purification by the coal tar in the furnace gas and dust, only adopt two stage cyclone dedusting simple process to get final product.
4, the combustion gas that produced of rotary kiln internal combustion furnace gas enters the preheating storehouse from the side in raw material preheating storehouse, and preheating and feeding can be carried out synchronously.Therefore only needing to make a volume is 50m
3Monomer preheating storehouse get final product.Can simplify dependency structure, reduce the configuration of relevant device.
5, do not need special lime water cooler, the finished product lime of producing is not cooled off.
6, work simplification, equipment is simple, and installed capacity reduces more than 30%, can reduce cost of investment more than 40%.
Four, embodiment
Material and air-flow adopt counterflow heat exchange among the present invention, make Wingdale produce lime through preheating, decomposition, calcination.The reaction process that lime generates is: Wingdale is sent in the rotary kiln by oscillating feeder in the raw material preheating storehouse.Through the rotary kiln high-temperature calcination, obtain the finished product quickened lime.Be discharged in the buffering water cooler, after drag conveyer is transported, enter in the stockyard by promoting screening.
The method of utilizing rotary kiln directly burning calcium carbide furnace gas to be produced lime of the present invention, the steps include: at first to utilize high-temperature blower in airtight furnace of calcium carbide, to extract furnace gas out, furnace gas is directly sent into the burning nozzle after the two stage cyclone dedusting, the burning nozzle is big latus rectum reducing nozzle, utilize jet current principle that the electric furnace furnace gas is sprayed into the combustion chamber, furnace gas contacts directly burning of back with air in the buffering water cooler that gas blower blasts in the combustion chamber, the high-temperature fuel gas that produces enters rotary kiln by the kiln hood cover, from the incoming stock preheating of the kiln tail storehouse preheating Wingdale of rotary kiln, waste gas enters atmosphere through after the dedusting by chimney.
Furnace of calcium carbide with a 20000KVA is an example, and its furnace gas utilization can be produced the lime of 150 ton per days, and the fixed investment of technology of the present invention is about 7,200,000 yuan, can save 6,800,000 yuan for 1,400 ten thousand yuan than the investment of the rotary kiln production technique of present use.Has the furnace gas utilization that economic worth is very suitable for medium and small sized enterprises and middle-size and small-size electric furnace.
Claims (3)
1, a kind of method of utilizing rotary kiln directly burning calcium carbide furnace gas to be produced lime, it is characterized in that may further comprise the steps: utilize high-temperature blower in airtight furnace of calcium carbide, to extract furnace gas out, furnace gas is directly sent into the burning nozzle and is sprayed into the combustion chamber after the two stage cyclone dedusting, furnace gas contacts directly burning of back with air in the buffering water cooler that gas blower blasts in the combustion chamber, the high-temperature fuel gas that produces enters rotary kiln by the kiln hood cover, from the incoming stock preheating of the kiln tail storehouse preheating Wingdale of rotary kiln, waste gas enters atmosphere through after the dedusting by chimney.
2, the method for utilizing rotary kiln that directly burning calcium carbide furnace gas is produced lime according to claim 1, the nozzle that it is characterized in that burning are big latus rectum reducing nozzle, utilize jet current principle that the electric furnace furnace gas is injected in the combustion chamber.
3, the method for utilizing rotary kiln that directly burning calcium carbide furnace gas is produced lime according to claim 1 is characterized in that described preheating storehouse is a monomer preheating storehouse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100257077A CN101492256A (en) | 2009-03-06 | 2009-03-06 | Method for directly burning calcium carbide furnace gas to manufacture lime by using rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100257077A CN101492256A (en) | 2009-03-06 | 2009-03-06 | Method for directly burning calcium carbide furnace gas to manufacture lime by using rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101492256A true CN101492256A (en) | 2009-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100257077A Pending CN101492256A (en) | 2009-03-06 | 2009-03-06 | Method for directly burning calcium carbide furnace gas to manufacture lime by using rotary kiln |
Country Status (1)
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| CN (1) | CN101492256A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875036A (en) * | 2012-10-24 | 2013-01-16 | 石家庄市新华工业炉有限公司 | Heat storage type lime rotary kiln |
| CN102923973A (en) * | 2012-11-21 | 2013-02-13 | 新兴河北工程技术有限公司 | Push head of active lime pre-heater |
| CN111018369A (en) * | 2019-12-11 | 2020-04-17 | 东北大学 | Magnesite suspension decomposing furnace |
| CN111204788A (en) * | 2020-02-17 | 2020-05-29 | 浙江天蓝环保技术股份有限公司 | Process and system for preparing high-strength blocky active lime from carbide slag |
-
2009
- 2009-03-06 CN CNA2009100257077A patent/CN101492256A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102875036A (en) * | 2012-10-24 | 2013-01-16 | 石家庄市新华工业炉有限公司 | Heat storage type lime rotary kiln |
| CN102875036B (en) * | 2012-10-24 | 2014-02-12 | 石家庄新华能源环保科技股份有限公司 | Heat storage type lime rotary kiln |
| CN102923973A (en) * | 2012-11-21 | 2013-02-13 | 新兴河北工程技术有限公司 | Push head of active lime pre-heater |
| CN111018369A (en) * | 2019-12-11 | 2020-04-17 | 东北大学 | Magnesite suspension decomposing furnace |
| CN111018369B (en) * | 2019-12-11 | 2021-10-15 | 东北大学 | Magnesite suspension decomposing furnace |
| CN111204788A (en) * | 2020-02-17 | 2020-05-29 | 浙江天蓝环保技术股份有限公司 | Process and system for preparing high-strength blocky active lime from carbide slag |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20090729 |