CN104110958A - Method and device for supplying primary air for kiln head of cement kiln - Google Patents
Method and device for supplying primary air for kiln head of cement kiln Download PDFInfo
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- CN104110958A CN104110958A CN201310136013.7A CN201310136013A CN104110958A CN 104110958 A CN104110958 A CN 104110958A CN 201310136013 A CN201310136013 A CN 201310136013A CN 104110958 A CN104110958 A CN 104110958A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a method and a device for supplying primary air for a kiln head of a cement kiln. A step of heating the primary air is additionally carried out in a process. The device comprises a Roots blower, a primary air pipe, a combustor and a heating pipeline. The primary air pipe is connected with an air outlet of the Roots blower and is connected with the heating pipeline, an air outlet of the heating pipeline is connected with an air inlet of a coal injection pipe of the combustor, the heating pipeline is arranged on the top of an intermediate-temperature section of a grate cooler, and the primary air in the heating pipeline is heated by afterheat air in clinker which is cooled by the grate cooler. The method and the device have the advantages that a scheme for supplying the primary air for the kiln head of the cement kiln is optimized and starts with regulating and controlling the temperature of the primary air, accordingly, energy consumption in production procedures can be reduced, benefits can be indirectly increased for enterprises, the quality of the clinker can be improved, and the clinker yield can be increased.
Description
Technical field
The present invention relates to a kind of cement production process, specifically a kind of cement kiln wind supply method first time and feedway thereof.
Background technology
At present, all need to use kiln hood burner in new dry process for cement production, it has two aspect effects, and the one, be pulverized coal conveying fuel in kiln; The 2nd, the primary air of generation high-voltage high-speed, guarantees that coal dust can fully mix with high temperature secondary wind in kiln, is convenient to the rapid diffusion combustion of coal dust.The normal temperature air that a wind of existing burner is provided by roots blower, in actual production process, technical staff finds, temperature and the isoparametric impact of air quantity due to a wind of cement kiln kiln hood supply, energy consumption in production also embodies very large gap, and how Optimization Technology is technical problem in the urgent need to address to alleviate energy consumption.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of cement kiln wind supply method and feedway thereof for the first time, cement kiln wind supply for the first time scheme has been optimized in this invention, this scheme is started with from the wind-warm syndrome regulation and control of a wind, reduced the energy consumption in production process, indirectly improve the performance of enterprises, but also improved clinker quality and output.
The technical solution adopted in the present invention is: cement kiln is wind supply method for the first time, comprise that roots blower provides the step, burner of a wind to the step that Pulverized Coal and a wind are provided in rotary kiln to burner, the heating steps that also comprises a wind, the wind that roots blower provides heats by heater, the air themperature that guarantees a wind increases by 150 ~ 200 ℃, and a wind after heating enters burner.
Cement kiln is wind feedway for the first time, airduct, burner and a heating pipe line comprising roots blower, be connected with roots blower air outlet, one time airduct is connected with heating pipe line, the air outlet of heating pipe line is connected with the air inlet of coal injection pipe in burner, described heating pipe line is arranged on the top of grate-cooler middle-temperature section, by the waste heat air of the cooling grog of grate-cooler, a wind in heating pipe line is heated.
This device, described heating pipe line comprises blast pipe, discharge pipe and heat exchanger tube, and heat exchanger tube is arranged in grate-cooler middle-temperature section region, and the first and last end of heat exchanger tube is connected respectively at blast pipe, discharge pipe.
This device, a described airduct is connected with coal injection pipe, between airduct and coal injection pipe, be provided with control valve A, blast pipe is connected with an airduct, between blast pipe and an airduct, be provided with control valve B, discharge pipe is connected with coal injection pipe, is provided with control valve C between discharge pipe and coal injection pipe.
The invention has the beneficial effects as follows: the present invention, by improving a wind supply method, has improved effect of coal saving, and effect is very obvious, as follows by data list: by wind being added to economize on coal minutes three of heat supply technique; One, one be primary air flow because being heated, volume expands.As calculated, one time wind is heated to 250 ℃ from 30 ℃ of normal temperature, is guaranteeing that on the basis that former flow is constant, its normal temperature flow can reduce by 40% left and right, and the combustion air of this part saving is substituted by the high temperature secondary wind of 1000 ℃ of left and right completely.Can save coal consumption; Two, one is that this residue wind-warm syndrome of 60% has reduced from 30 ℃ of heat absorptions that are heated to 250 ℃ of this section of processes of normal temperature; Three, another piece is that wind facies has lacked 40% to consumption because of one time, its rotation speed of fan can decline 3 ~ 5 hertz (can decline in theory 10 ~ 15 hertz, but because heater has increased duct length and elbow, equally also can increase part resistance).
The hear rate that comprehensive this three part is saved, conversion is among grog, and about per kilogram grog can be saved standard coal consumption 1kg.And by using a wind heater, kiln hood secondary air temperature can improve 20 ~ 50 ℃, black duration and degree of heating contraction in length 1/3 in kiln, clinker quality, output all increase.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Reference numeral: 1 a, airduct, 2, burner, 201, coal injection pipe, 3, heating pipe line, 301, blast pipe, 302, discharge pipe, 303, heat exchanger tube, 4, grate-cooler middle-temperature section, 5, control valve A, 6, control valve B, 7, control valve C, 8, rotary kiln, 9, kiln head cover high-temperature area, 10, kiln hood platform, 11, grate.
The specific embodiment
By reference to the accompanying drawings, describe most preferred process of the present invention and device thereof in detail;
Cement kiln is wind supply method for the first time, comprise that roots blower provides the step, burner of a wind to the step that Pulverized Coal and a wind are provided in rotary kiln to burner, the heating steps that also comprises a wind, the wind that roots blower provides heats by heater, the air themperature that guarantees a wind increases by 150 ~ 200 ℃, and a wind after heating enters burner.By wind being added to the effect that heat supply technique brings, can calculate from three aspects:; One, a wind are because being heated, and volume expands, as calculated, one time wind is heated to 250 ℃ from 30 ℃ of normal temperature, guaranteeing that on the basis that former flow is constant, its normal temperature flow can reduce by 40% left and right, the combustion air of this part saving is substituted by the high temperature secondary wind of 1000 ℃ of left and right completely.Can save coal consumption; It two is that this residue wind-warm syndrome of 60% has reduced from 30 ℃ of heat absorptions that are heated to 250 ℃ of this section of processes of normal temperature; It three is that wind facies has lacked 40% to consumption because of one time, and its rotation speed of fan can decline 3 ~ 5 hertz.
As shown in drawings, cement kiln is wind feedway for the first time, the airduct 1, burner 2 and the heating pipe line 3 that comprise roots blower, be connected with roots blower air outlet, one time airduct 1 is connected with heating pipe line 3, the air outlet of heating pipe line 3 is connected with the air inlet of coal injection pipe 201 in burner 2, described heating pipe line 3 is arranged on the top of grate-cooler middle-temperature section 4, waste heat air by the cooling grog of grate-cooler heats a wind in heating pipe line 3, this structure can fully reclaim grog waste heat, saves coal consumption.
The present invention, described heating pipe line 3 comprises blast pipe 301, discharge pipe 302 and heat exchanger tube 303, heat exchanger tube 303 is arranged in grate-cooler middle-temperature section 4 regions, and heat exchanger tube 303 belows are grate 11, and the first and last end of heat exchanger tube 303 is connected respectively at blast pipe 301, discharge pipe 302; A described airduct 1 is connected with coal injection pipe 201, between airduct 1 and coal injection pipe 201, be provided with control valve A5, blast pipe 301 is connected with an airduct 1, between blast pipe 301 and an airduct 1, be provided with control valve B6, discharge pipe 302 is connected with coal injection pipe 201, between discharge pipe 302 and coal injection pipe 201, is provided with control valve C7.When not needing heating pipe line work, can open control valve A, closed control valve B and control valve C, one time wind directly enters coal injection pipe from former airduct, adopts traditional mode of operation; When heating pipe line comes into operation, can closed control valve A, open control valve B and control valve C, one time wind enters heater through management, after the flue gas of 400 ~ 500 ℃ of grate-cooler middle-temperature sections, returns to coal injection pipe again, plays the effect of burning aid coal saving.
Described burner comprises a running gear and a coal injection pipe 201, and running gear is arranged on kiln hood platform 10, and coal injection pipe one end is connected with rotary kiln 8 through kiln hood high-temperature area 9.
The present invention, in order to increase the wearability of heating pipe line, heating pipe line adopts stainless steel heat-resistant, wear-resistant steel pipe to make, and is connected after going out grate-cooler with refractory metal flexible pipe with air inlet of combustor, does not affect the mobility of burner.When guaranteeing the equal heat time, reduce elbow as far as possible simultaneously, reduce resistance, the shape of heating pipe line can be two (groups) side by side, the mode that can be also several rings by series and parallel connects.
Claims (4)
1. cement kiln wind supply method for the first time, comprise that roots blower provides the step, burner of a wind to the step that Pulverized Coal and a wind are provided in rotary kiln to burner, it is characterized in that: the heating steps that also comprises a wind, the wind that roots blower provides heats by heater, the air themperature that guarantees a wind increases by 150 ~ 200 ℃, and a wind after heating enters burner.
2. cement kiln wind feedway for the first time, it is characterized in that: comprise roots blower, the airduct (1) being connected with roots blower air outlet, burner (2) and heating pipe line (3), an airduct (1) is connected with heating pipe line (3), the air outlet of heating pipe line (3) is connected with the air inlet of coal injection pipe (201) in burner (2), described heating pipe line (3) is arranged on the top of grate-cooler middle-temperature section (4), by the waste heat air of the cooling grog of grate-cooler, a wind in heating pipe line (3) is heated.
3. cement kiln according to claim 2 wind feedway for the first time, it is characterized in that: described heating pipe line (3) comprises blast pipe (301), discharge pipe (302) and heat exchanger tube (303), heat exchanger tube (303) is arranged in grate-cooler middle-temperature section (4) region, and the first and last end of heat exchanger tube (303) is connected respectively at blast pipe (301), discharge pipe (302).
4. cement kiln according to claim 3 wind feedway for the first time, it is characterized in that: a described airduct (1) is connected with coal injection pipe (201), between an airduct (1) and coal injection pipe (201), be provided with control valve A(5), blast pipe (301) is connected with an airduct (1), between blast pipe (301) and an airduct (1), be provided with control valve B(6), discharge pipe (302) is connected with coal injection pipe (201), between discharge pipe (302) and coal injection pipe (201), is provided with control valve C(7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310136013.7A CN104110958A (en) | 2013-04-19 | 2013-04-19 | Method and device for supplying primary air for kiln head of cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310136013.7A CN104110958A (en) | 2013-04-19 | 2013-04-19 | Method and device for supplying primary air for kiln head of cement kiln |
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| Publication Number | Publication Date |
|---|---|
| CN104110958A true CN104110958A (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310136013.7A Pending CN104110958A (en) | 2013-04-19 | 2013-04-19 | Method and device for supplying primary air for kiln head of cement kiln |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5299512A (en) * | 1991-04-19 | 1994-04-05 | F. L. Smidth & Co. A/S | Burner for a rotary kiln |
| CN1182200A (en) * | 1996-11-13 | 1998-05-20 | 李俊峰 | Burning system for rotary cement kiln |
| CN101172791A (en) * | 2007-11-05 | 2008-05-07 | 关树祥 | Composite whitening method with carbon and plasma composite reduction of white cement and special device |
| CN201885553U (en) * | 2010-12-08 | 2011-06-29 | 鞍山市华杰建材技术开发有限公司 | Energy-saving efficiency-improving rotary kiln with double temperature fields |
| CN203231633U (en) * | 2013-04-19 | 2013-10-09 | 天瑞集团水泥有限公司 | Kiln head primary-air supply device for cement kiln |
-
2013
- 2013-04-19 CN CN201310136013.7A patent/CN104110958A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5299512A (en) * | 1991-04-19 | 1994-04-05 | F. L. Smidth & Co. A/S | Burner for a rotary kiln |
| CN1182200A (en) * | 1996-11-13 | 1998-05-20 | 李俊峰 | Burning system for rotary cement kiln |
| CN101172791A (en) * | 2007-11-05 | 2008-05-07 | 关树祥 | Composite whitening method with carbon and plasma composite reduction of white cement and special device |
| CN201885553U (en) * | 2010-12-08 | 2011-06-29 | 鞍山市华杰建材技术开发有限公司 | Energy-saving efficiency-improving rotary kiln with double temperature fields |
| CN203231633U (en) * | 2013-04-19 | 2013-10-09 | 天瑞集团水泥有限公司 | Kiln head primary-air supply device for cement kiln |
Non-Patent Citations (1)
| Title |
|---|
| 江旭昌: "《回转窑煤粉燃烧器的发展趋势、特点及选择（二）》", 《新世纪水泥导报》 * |
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Application publication date: 20141022 |