CN100369849C - Method for manufacturing cement clinker with gas calcination and shaft kiln - Google Patents
Method for manufacturing cement clinker with gas calcination and shaft kiln Download PDFInfo
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- CN100369849C CN100369849C CNB021572798A CN02157279A CN100369849C CN 100369849 C CN100369849 C CN 100369849C CN B021572798 A CNB021572798 A CN B021572798A CN 02157279 A CN02157279 A CN 02157279A CN 100369849 C CN100369849 C CN 100369849C
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- kiln
- gas
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- cement clinker
- combustion gas
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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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods
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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
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
- Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a method for producing cement clinker by calcination with fuel gas and a shaft kiln. The method for preparing cement clinker by calcination with fuel gas comprises: a certain quantity of combustion coal is added in raw materials required for producing cement clinker according to the clinker formation heat in the middle of a kiln, the mixture is ground into raw material powder, 11 to 14% of water is added in the raw material powder, and then the raw material powder is prepared into material pellets with the diameter of 5 to 15mm, the material pellets are put in the kiln and uniformly distributed on the cross section for calcination, and oxygen or air is led into the kiln from the bottom for supporting combustion; the raw material pellets are calcined into clinker in the kiln, and then the clinker is discharged from the kiln by a discharging device driven by a driving device through a discharging elephant trunk. The present invention is characterized in that biotic substances are gasified to generate fuel gas, the fuel gas is loaded into the kiln by uniformly passing through the kiln wall in the circumferential direction by multiple paths at the middle part of a kiln body after equalizing the pressure of the fuel gas and regulating the quantity of the fuel gas. The present invention finds an efficient path for the reutilization of the biotic substances, coal consumption can be saved by 30 to 40%, conventional energy resource can be saved, the settling amount of coal ash is reduced by 30 to 40%, the compressive strength of the clinker for 28 days is increased by 5 to 8Mpa, environmental pollution is reduced, and the present invention has favorable economical benefit and social benefit.
Description
Technical field:
The present invention relates to the production method and the shaft kiln thereof of calcination of cement clinker.
Background technology:
The most of shaft kiln technology that adopts of China's manufacture of cement, it is wide to distribute.Existing shaft kiln calcination cement clinker is to be mixed into fecula and to add 11～13% water forms 3-15mm in pan-pelletizer pellet and go into kiln calcining and realization containing Wingdale, clay, iron powder, mineralizer and coal.Reasons such as heat lost by radiation owing to the kiln wall, cause kiln limit portion per kilogram grog to form the ratio of specific heat middle part and exceed 1250KJ, because what adopt at present is the full coal calcination of solid fuel, when coal blending, can't be distinguished, whole kiln section is all pressed the required hot coal blending of formation of limit portion grog, cause the middle part improper ventilation like this, easily produce knot kiln, knot column of flame phenomenon; The sedimentation of coal ash powder causes the grog silica modulus to descend, and influences 28 days ultimate compression strength of cement, influences the quality and the output of cement.By retrieval, do not see so far and adopt combustion gas, particularly adopt the report that is used for shaft kiln calcination cement clinker method by the combustion gas of biomass and flammable solid refuse gasification.
Technology contents:
The objective of the invention is to propose a kind of shaft kiln and production technique thereof of using gas calcining to produce cement clinker, structure by changing shaft kiln, and use combustion gas by biomass and flammable solid refuse gasification, overcoming the above-mentioned defective of prior art, and can save conventional energy resources and reduce environmental pollution.
The present invention produces the shaft kiln of cement clinker with gas calcining, comprises kiln body 3, chimney 1, is arranged at kiln body 3 vertical cloth buckets 2, is arranged at the gas blower 5 of kiln body 3 bottoms, dumping device 4 and transmission mechanism 6 thereof and discharging elephant trunk 7, service platform 8; It is characterized in that: with the combustion gas that acts as a fuel through the female pipe 10 of combustion gas, adjusting valve 11, enter be arranged at kiln body 3 middle parts multichannel circumferentially uniform combustion gas pipe arrangement 12 pass the kiln wall and send in the kiln.
The present invention produces the method for cement clinker with gas calcining, comprise and cooperating with certain proportion producing the required raw material of cement clinker, and allocate a certain amount of fire coal into, grind into the raw material powder, the moisture content that adds 11-14% weight is again made the raw material ball that diameter is 5-15mm, sends in the kiln, evenly be covered with on the transverse section of whole shaft kiln and calcine, oxygen or air are sent in the kiln combustion-supporting from the bottom; Waste gas is directly discharged or is discharged after cleaning apparatus purifies through chimney: raw material ball is fired into grog in kiln after, in kiln, rotate under transmission mechanism 6 drives by dumping device 4, discharge in kiln by discharging elephant trunk 7 then, and pack: it is characterized in that: form heat (2500-2950KJ/Kg) by middle part, kiln transverse section grog in the described raw material and allocate a certain amount of fire coal into, with the combustion gas that acts as a fuel after all pressing and regulating the gas quantity size, from circumferential uniform the sending in the kiln of kiln body middle part multichannel.
The optimum position of described combustion gas pipe arrangement 12 is 0-2 rice, kiln body 3 enlarging place bottom; Described multichannel is circumferentially uniform, and the preferred usually 3-12 road combustion gas pipe arrangement 12 circumferential uniform kiln walls that pass that adopt are sent in the kiln.
The combustion gas that described combustion gas adopts bent gasifying biomass to produce; Also can adopt other combustion gas of the combustion gas, Sweet natural gas or the coal gas that comprise that the flammable solid refuse gasification produces.
Form heat (2500-2950KJ/Kg) by kiln middle part grog in the described raw material and allocate a certain amount of fire coal into, account for the coal dust of raw material powder weight ratio 0-11% for adding;
Also can add weight ratio in the described raw material ball is that 0-3%, granular size are prepared burden at the biomass fuel of 1-15 millimeter.
Shaft kiln of the present invention is compared with the existing shaft kiln that adopts the solid fuel calcining to produce cement clinker, its key distinction is that basis is the characteristics of fuel with the combustion gas, be provided with the female pipe 10 of combustion gas, behind adjusting valve 11, enter the circumferential uniform combustion gas pipe arrangement 12 of the multichannel that is arranged at kiln body 3 middle parts and send in the kiln.
The inventive method is compared with the existing technology that adopts the full coal calcination of solid fuel to produce cement clinker, and its key distinction is to adopt the gas calcining cement clinker, can adopt the various combustion gas of the combustion gas that comprises biomass and produce, Sweet natural gas, coal gas.Because fuel gas buring speed is apparently higher than burning of coal speed, so can improve the cement output of shaft kiln.
Particularly the present invention adopts the combustion gas that is produced by biomass and flammable solid refuse gasification, for effective way has been found in the numerous biomass energy of China and the utilization again of flammable solid rubbish.Because the reproducibility of biomass is inexhaustible, and the disposable energy of coal-fired genus is exhausted day by day, introduces the biomass calcination of cement clinker and can realize that the holding property of Cement industry develops again.
The present invention's employing forms heat (2500-2950KJ/Kg) by kiln transverse section middle heat material and allocates a certain amount of coal-fired technology in raw material, having eliminated existing single fuel burns the coal shaft kiln and forms heat (needing to increase the heat of 1250KJ/Kg) by kiln limit portion grog and allocate fire coal into and make the too much disadvantage of material coal blending amount in the middle part of the kiln, thereby the change of this technology not only can reduce the sinkability 30-40% that coal consumption 30-40% has also reduced coal ash, and improved the quality and the quantity of product cement, improved 28 days ultimate compression strength (150 examination criteria) of grog 5-8Mpa.
But the present invention is fuel saving, saving conventional energy resources both, improves the quality and the quantity of product cement, and can reduce environmental pollution, has good economic benefit and social benefit.
Description of drawings:
Fig. 1 is the basic structure synoptic diagram of gas calcining cement clinker shaft kiln of the present invention.
Embodiment:
Embodiment 1:
The basic structure of gas calcining production cement clinker shaft kiln of the present invention as shown in Figure 1.Kiln body 3 both had been the supporting of whole shaft kiln, was again the kiln of calcination of cement clinker.Being arranged at shaft kiln top cloth bucket 2 evenly is covered with the raw material ball that drops on the intravital section of kiln; The gas blower 5 that is arranged at kiln body 3 bottoms provides the required combustion air of calcine cement in the kiln; Chimney 1 is used for discharging the flue dust that combustion processes produces.Dumping device 4 is driven by transmission mechanism 6, cement clinker is entered elephant trunk 7, flows out kiln body 3 by elephant trunk 7 again and packs, and circumferentially service platform 8 is stood thereon to handle unusual phenomenoies such as caking takes place in the kiln for the operator.It is to be furnished with biomass gasifying furnace 9 to produce inflammable gas that the present invention adopts the principal feature of biological fuel gas calcination of cement clinker shaft kiln; After the inflammable gas that is produced by vapourizing furnace is all pressed in the female pipe 10 of combustion gas, regulate the gas quantity that enters in the kiln by air-valve 11 according to the needs of calcination process, the 3-12 road through being arranged at kiln body 3 middle parts circumferentially uniform combustion gas pipe arrangement 12 enters the heat release of kiln internal combustion; The pressure of combustion gas in pipe arrangement 12 is higher than kiln inner pressure.
Compare with the existing structure that adopts the full coal calcination of solid fuel to produce the shaft kiln of cement clinker, gas calcining of the present invention is produced the 1-8 parts in the basic structure of cement clinker shaft kiln and is acted on identical, be unworthy of combustion gas in the former calcining process, do not have the combustion gas input in its calcination process, its required grog forms heat all by providing behind the coal combustion.
The technical process that the present invention produces cement clinker is: required starting material (normally Wingdale, clay, iron powder) are cooperated with common certain proportion, form heat (2500-2950KJ/Kg) by middle part, kiln transverse section grog and allocate a certain amount of fire coal into, grind into the raw material powder, it is pellet about 5-15mm that the moisture content that adds 11-14% is again made diameter through nodulizer, cloth bucket 2 in rotary conveyor is sent into kiln, cloth bucket 2 evenly is covered with pellet on the whole shaft kiln transverse section to be calcined, and the required oxygen that burns blasts in the kiln combustion-supporting by gas blower 5 from the bottom.After biomass produce combustion gas by gasification stone stove 9, sent into the female pipe 10 of combustion gas of all pressure effects, but regulate the size of kiln gas quantity through adjusting valve after, enter the circumferential uniform combustion gas pipe arrangement 12 in the 3-12 road that is arranged at kiln body 3 bottoms and send into the heat release of kiln internal combustion, burn till the heat (1250KJ/Kg) of required increase to replenish limit portion grog.The waste gas that whole burning produced is directly discharged or is discharged after dust arrester installation purifies through chimney 1.
Can add the coal dust of weight ratio in the described raw material powder at 0-11%; Can add weight ratio in the described raw material ball is the biomass fuel batching of 0-3% granular size at the 1-15 millimeter.
Raw material ball is fired into grog in kiln after, dumping device 4 rotates in kiln under transmission mechanism 6 drives, and is discharged in kiln by discharging elephant trunk 7 then, and packs.If when the kiln face abnormal conditions occur and need handle, on service platform 8, handle by the operative employee.
Claims (6)
1. produce the shaft kiln of cement clinker with gas calcining for one kind, comprise kiln body, chimney, be arranged at the vertical cloth bucket of kiln body, be arranged at the gas blower of kiln body bottom, dumping device and transmission mechanism thereof and discharging elephant trunk; Service platform; It is characterized in that: with the combustion gas that acts as a fuel behind the female pipe of combustion gas adjusting valve, enter be arranged at kiln body middle part multichannel circumferentially uniform combustion gas pipe arrangement pass the kiln wall and send in the kiln.
2. produce the shaft kiln of cement clinker according to claim 1 with gas calcining, it is characterized in that: the described position that is arranged at the combustion gas pipe arrangement at kiln body middle part is 0-2 rice, kiln body enlarging place bottom; Described multichannel is circumferentially uniform, adopts the circumferential uniform kiln wall that passes of 3-12 road combustion gas pipe arrangement to send in the kiln.
3. method of producing cement clinker with the described shaft kiln of claim 1 with gas calcining, comprise and grind into the raw material powder producing the required raw material of cement clinker, the moisture content that adds 11-14% weight again, make the raw material ball that diameter is 5-15mm, send into evenly to be covered with on the transverse section of whole shaft kiln in the kiln and calcine, oxygen or air are sent in the kiln combustion-supporting from the bottom; Waste gas is directly discharged or is discharged after cleaning apparatus purifies through chimney; Raw material ball is fired into grog in kiln after, under transmission mechanism (6) drives, in kiln, rotate, discharge in kiln by discharging elephant trunk (7) then, and pack by dumping device (4); It is characterized in that: form heat by kiln middle part grog in the described raw material and allocate the coal dust that accounts for raw material grain weight amount per-cent 0-11% into, with the combustion gas that acts as a fuel after all pressing and regulating the gas quantity size, from circumferential uniform the sending in the kiln of kiln body middle part multichannel.
4. as produce the method for cement clinker as described in the claim 3 with gas calcining, it is characterized in that the combustion gas that described combustion gas adopts the combustion gas that produced by gasifying biomass or flammable solid refuse gasification to produce.
5. as produce the method for cement clinker as described in the claim 3 with gas calcining, it is characterized in that described combustion gas is Sweet natural gas or coal gas.
6. as produce the method for cement clinker as described in the claim 3 with gas calcining, it is characterized in that also adding in the described raw material ball weight percent and be 0-3%, granular size biomass fuel batching at the 1-15 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021572798A CN100369849C (en) | 2002-12-25 | 2002-12-25 | Method for manufacturing cement clinker with gas calcination and shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021572798A CN100369849C (en) | 2002-12-25 | 2002-12-25 | Method for manufacturing cement clinker with gas calcination and shaft kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1510004A CN1510004A (en) | 2004-07-07 |
| CN100369849C true CN100369849C (en) | 2008-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021572798A Expired - Fee Related CN100369849C (en) | 2002-12-25 | 2002-12-25 | Method for manufacturing cement clinker with gas calcination and shaft kiln |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285647B (en) * | 2008-05-05 | 2010-04-07 | 黄官禹 | Vertical type calcining kiln falling control device |
| CN105776904A (en) * | 2016-03-08 | 2016-07-20 | 江苏中圣园科技股份有限公司 | Combustion method of fuel in shaft kiln |
| CN110104971B (en) * | 2019-05-28 | 2021-09-07 | 河北鼎星水泥有限公司 | Cement clinker processing technology and cement clinker |
| CN111351355A (en) * | 2020-04-01 | 2020-06-30 | 海城市国田矿业有限公司 | Production method for improving firing efficiency of light-fired kiln |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033238A (en) * | 1983-08-03 | 1985-02-20 | 日本セメント株式会社 | Vertical jet stream layer calcining apparatus for cement rawmaterial |
| CN2228182Y (en) * | 1995-06-08 | 1996-05-29 | 褚衍旭 | Vertical refuse incinerator |
| US5738511A (en) * | 1996-06-07 | 1998-04-14 | Council Of Scientific & Industrial Research | Vertical shaft kiln |
| CN2586118Y (en) * | 2002-12-25 | 2003-11-12 | 中国科学技术大学 | Verticle kiln for producing cement grog by using gas annealing |
-
2002
- 2002-12-25 CN CNB021572798A patent/CN100369849C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6033238A (en) * | 1983-08-03 | 1985-02-20 | 日本セメント株式会社 | Vertical jet stream layer calcining apparatus for cement rawmaterial |
| CN2228182Y (en) * | 1995-06-08 | 1996-05-29 | 褚衍旭 | Vertical refuse incinerator |
| US5738511A (en) * | 1996-06-07 | 1998-04-14 | Council Of Scientific & Industrial Research | Vertical shaft kiln |
| CN2586118Y (en) * | 2002-12-25 | 2003-11-12 | 中国科学技术大学 | Verticle kiln for producing cement grog by using gas annealing |
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| CN1510004A (en) | 2004-07-07 |
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Granted publication date: 20080220 Termination date: 20100125 |