CN109867462A - A kind of cement burning system and application method - Google Patents
A kind of cement burning system and application method Download PDFInfo
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- CN109867462A CN109867462A CN201910147104.8A CN201910147104A CN109867462A CN 109867462 A CN109867462 A CN 109867462A CN 201910147104 A CN201910147104 A CN 201910147104A CN 109867462 A CN109867462 A CN 109867462A
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Abstract
The disclosure belongs to technical field of cement production, and in particular to a kind of cement burning system and application method.Cement burning mostly uses the mode for carrying out entering calcined by rotary kiln after predecomposition to Calcium carbonate ingredient in decomposing kiln in the prior art, coal dust is passed through in kiln in calcination process and is calcined together with cement, higher to the quality requirements of coal dust, increases cost.In addition, can generate NOx in calcination process, environmental pollution is more serious.The disclosure is provided with independent gasification furnace before decomposing kiln, coal dust is passed through in gasification furnace, make coal dust gasification using tertiary air (900 DEG C), and it is calcined again after being incorporated part water vapour it being made to be changed into coal gas, using the device in the disclosure, the coal dust that high-quality can be replaced with the coal dust of low-quality, is greatly saved production cost.Meanwhile the gasification furnace in the disclosure can also be passed through high-temperature water vapor, generate reducibility gas and enter rotary kiln progress denitration, which, which is applied to manufacture of cement, has good technical effect.
Description
Technical field
The disclosure belongs to technical field of cement production, more particularly to a kind of decomposition coal pit for cement production, has
The technical effect for reducing coal dust cost, reducing nitrogen oxide emission.
Background technique
The information for disclosing the background technology part is merely intended to increase the understanding to the general background of the disclosure, without certainty
It is considered as recognizing or implying in any form that information composition has become existing skill well known to persons skilled in the art
Art.
Since Englishman A Sipuding in 1824 discloses Portland cement, cement products after nearly 200 years constantly change
Into, so far, be still usage amount it is big, it is of fine quality, inexpensive and keep sustainable growth large construction material, still without any one
Kind construction material can replace its traditional advantage status.The disclosure of cement changes the looks in the world, is progress of human society
And economic development is made that tremendous contribution, but the problem of cement industry environmental pollution is to cannot be neglected.Cement industry is raw
A large amount of pernicious gas, such as oxysulfide, nitrogen oxides, hydrocarbon are discharged during producing.These pollutants to human body,
Animals and plants etc. can all cause very big harm.
The Zones With Common Portland Cement technological process of production can be divided into raw material preparation, clinker burning, cement production systD (grinding) and packet
The processes such as dress.The bulk raw materials such as lime stone broken rear and clay, iron ore etc. are sent into grinding machine in proportion, are ground into thin life
Feed powder, input stirring library, is stirred in library with compressed air, and adjusting component is to qualified raw meal powder.The raw material prepared exist
Clinker is sintered into the rotary kiln of different types.General raw meal powder or raw slurry are calcined in rotary kiln, and China is most of
Small-sized cement factory is all made of shaft kiln calcination, with the coal dust for being mixed into needs in raw meal powder when shaft kiln calcination, and adds suitable quantity of water mixing system
The raw material ball for being 10~30mm at diameter.The cement clinker quality of shaft kiln calcination is slightly poor, but calcination temperature is low, and coal consumption is smaller.
For energy saving, the production capacity of raising rotary kiln, the kiln of suspension preheater preheater and dore furnace is developed since the beginning of the 1970s
External decomposition technology.
Cement predecomposition kiln is the dore furnace added between suspended preheater and rotary kiln, addition 30 wherein~
60% fuel, the endothermic decomposition process of the combustion heat release process and raw material that make fuel simultaneously suspended state or fluidisation state under extremely
It promptly carries out, raw material is made to be substantially finished the decomposition reaction of carbonate, thus the calcining effect of kiln system before entering rotary kiln
Rate increases substantially.NOx can be generated in calcination process in rotary kiln, the catalysis of chosen property or non-catalytic reduction reaction carry out flue gas
Denitration.Wherein, the gas denitrifying technology achievement based on selective non-catalytic reduction technology (SNCR) is significant, but the removing of SCNR
Efficiency depends primarily on reaction temperature, NH3With the stoichiometric ratio, mixability and reaction time of NOx etc..Studies have shown that
The temperature control of SNCR technique is most important.If temperature is too low, NH3Reaction it is incomplete.It is easy to cause NH3Leakage；And temperature mistake
Height, NH3It is then oxidized easily and counteracts NH for NOx3Removal effect.It is too high or too low for temperature can all cause reducing agent loss and
The decline of NOx removal rate.In general, up to 30%~50% removal efficiency can be reached by designing reasonable SNCR technique.
In addition, cement decomposition kiln is more demanding to coal dust, it is desirable that fineness of pulverized coal is thin, and water content is low, otherwise will affect calcining
Cement quality afterwards.The coal dust cost for meeting condition is higher, increases production cost.
Summary of the invention
For the above technological deficiency, a kind of producer that can reduce production cost, reduce nitrogen oxide emission is proposed
Method is of great significance.In order to solve the above-mentioned technical problem, present disclose provides a kind of cement burning system, the cement burning systems
System increases gasifying furnace device before traditional cement predecomposition kiln, and coal dust, water vapour and part tertiary air are passed through gasification
Furnace partial gasification is passed through decomposition kiln again after becoming coal gas and rotary kiln is calcined, and the coal gas of generation can effectively improve calcining
Efficiency.In addition, good coal dust need to be used when cement burning in the prior art, adopted by the cement burning system in the disclosure
It replaces traditional coal dust to participate in calcining with coal gas, quality raw materials coal dust can be replaced using secondary feedstock coal dust, save the cost
The quality of cement will not be reduced simultaneously.
In order to realize the above technical purpose, the disclosure the following technical schemes are provided:
For the disclosure in a first aspect, providing a kind of cement burning system, which includes coal dust general pipeline, tertiary air
Pipeline, gasification furnace decompose kiln and rotary kiln, and tertiary air pipeline is one section of continuous conduit, are somewhere divided into two branch pipe(tube)s A and B,
Lateral A is connected with gasification furnace, and lateral B is connected with kiln is decomposed, for providing combustion into gasification furnace and decomposition kiln
Required air is burnt, valve I and II is respectively set on lateral A and B for adjusting air inflow.
Nozzle is additionally provided on lateral A, for the nozzle between valve I and gasification furnace, coal dust general pipeline passes through spray
Mouth is connected to gasification furnace, for spraying into coal dust into gasification furnace.
There is gasification furnace bottom pipeline to be connected to kiln is decomposed.
Decomposing kiln bottom portion, there is pipeline to be connected to rotary kiln.
In above system, coal dust enters gasification furnace through coal dust general pipeline, and imperfect combustion forms coal gas, gasification in gasification furnace
The coal gas generated in furnace and the remaining coal dust that burns enter to decompose together to be calcined in kiln.Dant replacement can be added in gasification furnace
Good coal carries out calcining and obtains coal gas, reduces production cost.
Preferably, there is pipeline to be connected to rotary kiln on gasification furnace top.
Preferably, above-mentioned combustion system further includes main steam range, and the main steam range is connected by said nozzle and gasification furnace
It is logical, for being passed through high temperature and high pressure steam into gasification furnace.
Patent CN106642085A discloses a kind of to kiln tail smoke-box penetrating high temperature and high pressure steam, three wind of coal dust and part
The scheme of secondary wind eliminates the nitrogen oxygen generated in rotary kiln using the water gas reaction occurred under the conditions of water vapour and coal fines high-temperature
Compound.The disclosure completes the gasification of coal dust by increasing gasification furnace before decomposing kiln in gasification furnace, special compared to above-mentioned
Scheme in benefit, the gasification of coal gas is realized in ad hoc gasification furnace in the disclosure, the temperature and reaction balance of gasification reaction
It is all more convenient controllable.Meanwhile being connected in the top of gasification furnace setting pipeline with rotary kiln, water vapour and coal dust are in hot conditions
The water-gas density that lower reaction generates is lighter, rises naturally enter in rotary kiln, with rotary kiln by the road under gravity
Reduction reaction occurs for the nitrogen oxides that calcining generates, and NOx is reduced to N2It is discharged.
In above-mentioned patent by the way of spraying high-temperature water vapor directly into rotary kiln smoke-box, due to kiln tail smoke-box body
Product is smaller, and flue gas flow rate is higher, and the denitration reduction reaction time is very short；And have the blanking of bottom preheater, a large amount of raw material powder
End enters smoke-box；Water-gas sprays into herein, and nitrogen oxides reduction effect cannot be guaranteed.It is directly passed through into rotary kiln in the disclosure
Water-gas, rotary kiln diameter is big, and flue gas flow rate is very low herein, and the denitration reduction reaction time is long, and sufficiently, nitrogen oxides restores for reaction
Effect is good, does not influence the calcining of cement in rotary kiln, while improving the rate of reduction of nitrogen oxides.
Preferably, it is 0.8~1.2:8.8~9.2 that valve I and valve II, which control the aeration ratio of lateral A and B,.
Gasification furnace and the lateral for decomposing kiln have control valve adjustable air inflow in the disclosure, by adjusting gasification
Air inflow in furnace, the intake of aforementioned proportion can build the state of low oxygen combustion in gasification furnace, by the coal in gasification furnace
Powder is maximumlly converted into coal gas.Coal gas needed for air inflow can not then generate supply dore furnace in gasification furnace, excessively high then coal dust
Completely burned ratio increases, and causes the waste of resource.
Preferably, above-mentioned gasification furnace top and line connection are provided with valve III.
Preferably, gas in gasification furnace is adjusted by valve III, the ratio for making it into rotary kiln and entering decomposition kiln is
0.8~1.2:8.8~9.2.
Preferably, said nozzle is located on lateral A: lateral A entrance apart from gasification furnace center 0-1000mm and
It is not 0,2-6 nozzle is set along the periphery lateral A, nozzle forms 10-90 ° of folder towards gasification furnace and with lateral A
Angle.
Preferably, said nozzle is located at lateral A and gasification furnace connectivity part, and nozzle number is several.
Preferably, said nozzle is located at top of gasification furnace, it is further preferred that valve III and gasification furnace are connect with rotary kiln
Pipeline is located at gasification furnace sidewall.
Disclosure second aspect provides application of any one of the above cement burning system in cement production system.
The disclosure third aspect provides a kind of method for carrying out cement burning based on above-mentioned cement burning system, feature
It is, opens tertiary air pipeline, conveys air into gasification furnace and decomposition kiln, coal is added into gasification furnace by coal dust general pipeline
Powder lights gasification furnace, after having coal gas generation in gasification furnace, lights and decomposes kiln and rotary kiln.
Disclosure fourth aspect provides a kind of method for carrying out cement burning based on above-mentioned cement burning system, feature
It is, opens tertiary air pipeline, conveys air into gasification furnace and decomposition kiln, coal is added into gasification furnace by coal dust general pipeline
Powder lights gasification furnace, after having coal gas generation in gasification furnace, lights and decomposes kiln and rotary kiln；Main steam range is opened, to gasification furnace
In be passed through coal dust and water vapour simultaneously, open valve III, portion gas made to enter rotary kiln, calcine the gas finished and coal dust into
Enter to decompose kiln.
Disclosure beneficial effect
1. increasing gasifying furnace device before traditional cement decomposition kiln in the disclosure, coal dust is converted in gasification furnace
Calcined to be passed through to decompose in kiln and rotary kiln again after coal gas, the disclosure the study found that under this condition the coal dust of high-quality with
Dant generate gas composition it is substantially suitable, using coal gas directly as calcining raw materials after, combustion efficiency promoted, use dant generation
It completes to burn for high-quality coal, production cost can be effectively reduced.
2. gasification furnace can also spray into water vapour in the disclosure, class water gas reaction occurs, the reducibility gas of generation is excellent
Rotary kiln position is gentlier entered by the pipeline on gasification furnace top in quality and completes denitration reaction, reduces pollutant emission
Amount.
3. gasification furnace in the disclosure is by the valve regulated intake on lateral, can taking human as construction hypoxemia fire
Burning state improves the yield of coal gas.The gas content for entering rotary kiln and decomposing kiln can also be controlled by the valve at top, made
With convenient, efficient.
4. having nozzle for being connected to gas main and main steam range on gasification furnace lateral A, studied by the disclosure
It was found that good gasification efficiency can be obtained by adjusting the position of nozzle.
Detailed description of the invention
The Figure of description for constituting a part of this disclosure is used to provide further understanding of the disclosure, and the disclosure is shown
Meaning property embodiment and its explanation do not constitute the improper restriction to the disclosure for explaining the disclosure.
Fig. 1 is cement burning system schematic in the disclosure；
Wherein, 101 be main steam range, 102 be coal dust general pipeline, 2 be tertiary air pipeline, 201 be lateral A, 202 for point
Branch pipe(tube) B, 211 be valve I, 212 be valve II, 3 be gasification furnace, 301 be valve III, 302 be gasification furnace top connection revolution
The pipeline of kiln, 4 be decompose kiln, 5 be rotary kiln, A01 is nozzle.
Fig. 2 is the partial enlargement diagram of 4 gasification furnaces in Fig. 1.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Term explains part:
Gasification furnace: being built in front of decomposing kiln, and coal dust is previously prepared at coal gas, referred to as gasification furnace in gasification furnace.Point
Branch pipe(tube) A is connected to for air needed for conveying burning with gasification furnace, and there is pipeline to be connected to rotary kiln, will give birth to for top of gasification furnace
At reducibility gas be passed through rotary kiln position carry out denitration.There is gasification furnace bottom pipeline to be connected to kiln is decomposed, and burn
The coal gas of generation and remaining coal dust enter decomposition kiln through the pipeline and are calcined.
It is more demanding to gas quality during cement burning in the prior art as background technique is introduced, it brings
The rising of economic cost, while there are discharged nitrous oxides during traditional cement burning, existing for environment influences.For
Solution technical problem as above, the present disclosure proposes a kind of new cement burning systems, before decomposing kiln increase gasification
Furnace apparatus,.
In order to enable those skilled in the art can clearly understand the technical solution of the disclosure, below with reference to tool
The technical solution of the disclosure is described in detail in the embodiment and comparative example of body.
Embodiment 1
A kind of cement burning system, including coal dust general pipeline 102, tertiary air pipeline 2, gasification furnace 3, decomposition kiln 4 and rotary kiln
5, tertiary air pipeline 2 is one section of continuous conduit, is somewhere divided into two branch pipe(tube) A and B, i.e., 201 and 202, lateral A201
It is connected with gasification furnace 3, lateral B202 is connected with kiln 4 is decomposed, for providing burning into gasification furnace 3 and decomposition kiln 4
Valve I 211 and II 212 is respectively set on lateral A201 and B202 for adjusting air inflow for required air.
There is 3 bottom of gasification furnace pipeline to be connected to kiln 4 is decomposed.
Decomposing 4 bottom of kiln, there is pipeline to be connected to rotary kiln 5.
Nozzle A01 is additionally provided on lateral A201, the nozzle A01 is located on lateral A, and lateral A enters
Mouth arranges 2 nozzles, setting angle and lateral relative to 3 centre distance 500mm of gasification furnace, in the border lateral A
A201 forms 60 ° of angle.Coal dust general pipeline 102 is connected to by nozzle A01 with gasification furnace 3, for spraying into coal into gasification furnace 3
Powder.
Embodiment 2
A kind of cement burning system, including coal dust general pipeline 102, tertiary air pipeline 2, gasification furnace 3, decomposition kiln 4 and rotary kiln
5, tertiary air pipeline 2 is one section of continuous conduit, is somewhere divided into two branch pipe(tube) A and B, i.e., 201 and 202, lateral A201
It is connected with gasification furnace 3, lateral B202 is connected with kiln 4 is decomposed, for providing burning into gasification furnace 3 and decomposition kiln 4
Valve I 211 and II 212 is respectively set on lateral A201 and B202 for adjusting air inflow for required air.
There is 3 bottom of gasification furnace pipeline to be connected to kiln 4 is decomposed.
Decomposing 4 bottom of kiln, there is pipeline to be connected to rotary kiln 5.
There is pipeline 302 to be connected to rotary kiln 5 on gasification furnace 3 top.
Nozzle A01 is additionally provided on lateral A201, the nozzle A01 is located at lateral A and is connected to gasification furnace 3
Place, nozzle number are 4.Coal dust general pipeline 102 is connected to by nozzle with gasification furnace 3, for spraying into coal dust into gasification furnace 3.
Embodiment 3
A kind of cement burning system, including coal dust general pipeline 102, tertiary air pipeline 2, gasification furnace 3, decomposition kiln 4 and rotary kiln
5, tertiary air pipeline 2 is one section of continuous conduit, is somewhere divided into two branch pipe(tube) A and B, i.e., 201 and 202, lateral A201
It is connected with gasification furnace 3, lateral B202 is connected with kiln 4 is decomposed, for providing burning into gasification furnace 3 and decomposition kiln 4
Valve I 211 and II 212 is respectively set on lateral A201 and B202 for adjusting air inflow for required air.
There is 3 bottom of gasification furnace pipeline to be connected to kiln 4 is decomposed.
Decomposing 4 bottom of kiln, there is pipeline to be connected to rotary kiln 5.
There is pipeline 302 to be connected to rotary kiln 5 on gasification furnace 3 top.
Nozzle A01 is additionally provided on lateral A201, the nozzle A01 is located at 3 top of gasification furnace, valve III and gasification
Furnace 3 and 5 connecting pipe of rotary kiln are located at gasification furnace sidewall.Coal dust general pipeline 102 is connected to by nozzle with gasification furnace 3, is used for gas
Change and sprays into coal dust in furnace 3.
Embodiment 4
A kind of cement burning system, including coal dust general pipeline 102, tertiary air pipeline 2, gasification furnace 3, decomposition kiln 4 and rotary kiln
5, tertiary air pipeline 2 is one section of continuous conduit, is somewhere divided into two branch pipe(tube) A and B, i.e., 201 and 202, lateral A201
It is connected with gasification furnace 3, lateral B202 is connected with kiln 4 is decomposed, for providing burning into gasification furnace 3 and decomposition kiln 4
Valve I 211 and II 212 is respectively set on lateral A201 and B202 for adjusting air inflow for required air.
There is 3 bottom of gasification furnace pipeline to be connected to kiln 4 is decomposed.
Decomposing 4 bottom of kiln, there is pipeline to be connected to rotary kiln 5.
There is pipeline 302 to be connected to rotary kiln 5 on gasification furnace 3 top.
Nozzle A01 is additionally provided on lateral A201, the nozzle A01 is located on lateral A, and lateral A enters
Mouth encloses 2 nozzles of arrangement, setting angle and lateral relative to 3 centre distance 680mm of gasification furnace, in tertiary air pipeline last week
A201 forms 80 ° of angle.Coal dust general pipeline 102 is connected to by nozzle with gasification furnace 3, for spraying into coal dust into gasification furnace 3.
The combustion system further includes main steam range 101, and the main steam range 101 is connected to by nozzle A01 with gasification furnace 3,
For being passed through high temperature and high pressure steam into gasification furnace 3.
Embodiment 5
A kind of cement burning system, including coal dust general pipeline 102, tertiary air pipeline 2, gasification furnace 3, decomposition kiln 4 and rotary kiln
5, tertiary air pipeline 2 is one section of continuous conduit, is somewhere divided into two branch pipe(tube) A and B, i.e., 201 and 202, lateral A201
It is connected with gasification furnace 3, lateral B202 is connected with kiln 4 is decomposed, for providing burning into gasification furnace 3 and decomposition kiln 4
Valve I 211 and II 212 is respectively set on lateral A201 and B202 for adjusting air inflow for required air.
There is 3 bottom of gasification furnace pipeline to be connected to kiln 4 is decomposed.
Decomposing 4 bottom of kiln, there is pipeline to be connected to rotary kiln 5.
There is pipeline 302 to be connected to rotary kiln 5 on gasification furnace 3 top.
Nozzle A01 is additionally provided on lateral A201, the nozzle A01 is between valve I 211 and gasification furnace 3, coal
Powder general pipeline 102 is connected to by nozzle with gasification furnace 3, for spraying into coal dust into gasification furnace 3.
The combustion system further includes main steam range 101, and the main steam range 101 is connected to by nozzle A01 with gasification furnace 3,
For being passed through high temperature and high pressure steam into gasification furnace 3.
The aeration ratio that valve I and valve II control lateral A and B is 1:9.
Gas in gasification furnace is adjusted by valve III, the ratio for making it into rotary kiln and entering decomposition kiln is 1:9.
Embodiment 6
The application method of cement burning system is as follows in embodiment 1: opening tertiary air pipeline 2, to gasification furnace 3 and decomposes kiln
Air is conveyed in 4, coal dust is added into gasification furnace 3 by coal dust general pipeline 102, gasification furnace 3 is lighted, to have coal gas in gasification furnace 3
After generation, lights and decompose kiln 4 and rotary kiln 5.
Embodiment 7
The application method of cement burning system is as follows in embodiment 5: opening tertiary air pipeline 2, to gasification furnace 3 and decomposes kiln
Air is conveyed in 4, coal dust is added into gasification furnace 3 by coal dust general pipeline 102, gasification furnace 3 is lighted, to have coal gas in gasification furnace 3
After generation, lights and decompose kiln 4 and rotary kiln 5；Main steam range 101 is opened, is passed through coal dust and water vapour simultaneously into gasification furnace 3,
Valve III 301 is opened, portion gas is made to enter rotary kiln 4, the gas finished is calcined and coal dust enters decomposition kiln 5.
Embodiment 8
Cement burning is carried out using the device in the disclosure in embodiment 1, enters after coal dust gasification and decomposes kiln, reduce coal
The class of powder, cement buying expenses per ton can reduce 15-20 member.
The foregoing is merely preferred embodiment of the present disclosure, are not limited to the disclosure, for the skill of this field
For art personnel, the disclosure can have various modifications and variations.It is all within the spirit and principle of the disclosure, it is made any to repair
Change, equivalent replacement, improvement etc., should be included within the protection scope of the disclosure.
Claims (10)
1. a kind of cement burning system, which is characterized in that the cement burning system includes coal dust general pipeline, tertiary air pipeline, gas
Change furnace, decompose kiln and rotary kiln；The tertiary air pipeline is one section of continuous conduit, is somewhere divided into two branch pipe(tube)s A and B, point
Branch pipe(tube) A is connected with gasification furnace, and lateral B is connected with kiln is decomposed, for providing burning into gasification furnace and decomposition kiln
Required air, valve I is respectively set on lateral A and B and valve II is used to adjust gasification furnace and decompose the air inflow of kiln；
Nozzle is additionally provided on the lateral A, for the nozzle between valve I and gasification furnace, the coal dust general pipeline is logical
It crosses nozzle to be connected to gasification furnace, for spraying into coal dust into gasification furnace；
There is gasification furnace bottom pipeline to be connected to kiln is decomposed；
Decomposing kiln bottom portion, there is pipeline to be connected to rotary kiln.
2. cement burning system as described in claim 1, which is characterized in that the gasification furnace top has pipeline and rotary kiln
Connection.
3. cement burning system as claimed in claim 2, which is characterized in that the combustion system further includes main steam range, institute
It states main steam range to be connected to by the nozzle with gasification furnace, for being passed through high temperature and high pressure steam into gasification furnace.
4. cement burning system as described in claim 1, which is characterized in that the valve I and valve II control lateral A
Aeration ratio with B is 0.8~1.2:8.8~9.2.
5. cement burning system as described in claim 1, which is characterized in that the gasification furnace top and line connection are arranged
There is valve III.
6. cement burning system as claimed in claim 5, which is characterized in that valve III adjust gasification furnace in gas, make its into
The ratio for entering rotary kiln and entering decomposition kiln is 0.8~1.2:8.8~9.2.
7. cement burning system as claimed in claim 3, which is characterized in that the nozzle is located at said nozzle and is located at branched pipe
On road A: lateral A entrance is apart from gasification furnace center 0-1000mm and is not 0, and 2-6 spray is arranged along the periphery lateral A
Mouth, nozzle form 10-90 ° of angle towards gasification furnace and with lateral A；Or the nozzle is located at lateral A and gasification
Furnace connectivity part, nozzle number are several；Or the nozzle is located at top of gasification furnace, it is preferred that valve III and gasification furnace with return
Rotary kiln connecting pipe is located at gasification furnace sidewall.
8. application of any one of the claim 1-7 cement burning system in cement production system.
9. a kind of method for carrying out cement burning based on cement burning system described in claim 1, which is characterized in that open three times
Air piping conveys air into gasification furnace and decomposition kiln, coal dust is added into gasification furnace by coal dust general pipeline, lights gasification furnace,
After having coal gas generation in gasification furnace, lights and decompose kiln and rotary kiln.
10. a kind of method for carrying out cement burning based on cement burning system described in claim 3, which is characterized in that open three
Secondary air piping conveys air into gasification furnace and decomposition kiln, coal dust is added into gasification furnace by coal dust general pipeline, puts gasification
Furnace is lighted after having coal gas generation in gasification furnace and decomposes kiln and rotary kiln；Main steam range is opened, is passed through simultaneously into gasification furnace
Coal dust and water vapour open valve III, so that portion gas is entered rotary kiln, calcine the gas finished and coal dust enters decomposition kiln.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110360843A (en) * | 2019-07-31 | 2019-10-22 | 中国科学院力学研究所 | A kind of cement decomposing furnace coal dust high-efficiency gasification low-NO_x combustion technology device |
| CN111320213A (en) * | 2020-02-17 | 2020-06-23 | 彭思尧 | Comprehensive treatment method and system for red mud resource utilization |
| CN112125545A (en) * | 2020-08-31 | 2020-12-25 | 郑州英莱机电设备有限公司 | Technical method for reducing nitrogen of rotary cement kiln by using household garbage RDF |
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| CN106642085A (en) * | 2016-12-29 | 2017-05-10 | 湘潭大学 | Staged combustion technology for achieving efficient combustion of fire-retardant coal in pre-decomposition kiln and low NOx emission |
| CN109111136A (en) * | 2018-10-11 | 2019-01-01 | 北京汉能清源科技有限公司 | Cement kiln low-grade coal highly effective combustion system and method |
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- 2019-02-27 CN CN201910147104.8A patent/CN109867462A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642085A (en) * | 2016-12-29 | 2017-05-10 | 湘潭大学 | Staged combustion technology for achieving efficient combustion of fire-retardant coal in pre-decomposition kiln and low NOx emission |
| CN109111136A (en) * | 2018-10-11 | 2019-01-01 | 北京汉能清源科技有限公司 | Cement kiln low-grade coal highly effective combustion system and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110360843A (en) * | 2019-07-31 | 2019-10-22 | 中国科学院力学研究所 | A kind of cement decomposing furnace coal dust high-efficiency gasification low-NO_x combustion technology device |
| CN111320213A (en) * | 2020-02-17 | 2020-06-23 | 彭思尧 | Comprehensive treatment method and system for red mud resource utilization |
| CN112125545A (en) * | 2020-08-31 | 2020-12-25 | 郑州英莱机电设备有限公司 | Technical method for reducing nitrogen of rotary cement kiln by using household garbage RDF |
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Application publication date: 20190611 |