CN203177200U - Cement kiln oxygen-enriched combustion-supporting system - Google Patents
Cement kiln oxygen-enriched combustion-supporting system Download PDFInfo
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- CN203177200U CN203177200U CN2013200942121U CN201320094212U CN203177200U CN 203177200 U CN203177200 U CN 203177200U CN 2013200942121 U CN2013200942121 U CN 2013200942121U CN 201320094212 U CN201320094212 U CN 201320094212U CN 203177200 U CN203177200 U CN 203177200U
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- oxygen
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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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- 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
Abstract
Provided is a cement kiln oxygen-enriched combustion-supporting system. The cement kiln oxygen-enriched combustion-supporting system is characterized in that an oxygen-enriched outlet of an oxygen-enriched generating device is connected with an oxygen-enriched inlet of an air mixing device through a pipeline, an air inlet of the air mixing device is connected with an air outlet of an air pre-heater, a thermal medium inlet of the air pre-heater is connected with an outlet of a waste gas source, and an outlet of the air mixing device is respectively connected with all aerobic mechanisms of a cement kiln. The cement kiln oxygen-enriched combustion-supporting system fully utilizes smoke waste heat of the cement kiln, and achieves gradient utilization of cement kiln energy resources, high-temperature heat source electricity generation and low-temperature heat source combustion supporting, waste heat resources are fully utilized, and meanwhile the cement kiln oxygen-enriched combustion-supporting system improves combustion efficiency, reduces the coal powder consumption amount, increases flame temperature and improves clinker product quality.
Description
Technical fieldThe utility model relates to a kind of cement kiln burner.
Background technologyCement kiln is highly energy-consuming equipment, and the technology waste gas that has a lot of cement producing lines to drain is not fully utilized, and has wasted the energy, thereby energy-conservation especially to reduce coal consumption most important to reducing cement cost.Adopt oxygen-enriched combusting to have to improve flame temperature, reduce fuel burning-point, accelerate burning velocity, increase heat utilization ratio, reduce coefficient of excess air, reduce the gas fume after burning capacity, improve advantages such as cement quality.Cement kiln oxygen-enriched combusting coal saving rate can reach 2%～15%, the energy-saving effect highly significant.The oxygen-enriched air temperature not only influences flame temperature, burning velocity etc., also influences energy-saving effect.Under the situation of conditions permit, should improve the temperature of oxygen-enriched air as far as possible.Because oxygen enrichment generating means difference and cement kiln field conditions difference, directly each needs oxygen supply mechanism such as coal burner, kiln tail dore furnace, wind of burner and kiln hood secondary wind entrance to link to each other to the oxygen enrichment generating means that has with cement kiln respectively by pipeline, the method of oxygen-enriched air is not heated in this employing, the oxygen-enriched air temperature that sprays in the rotary kiln is normal temperature, and it can reduce the burning velocity of coal dust; The employing electricity or the coal gas that also have add hot-air, again with hot-air and oxygen-enriched air mixed incompatible raising oxygen-enriched air temperature, though it can accelerate burning velocity, and also can a large amount of energy of additive decrementation.
Summary of the inventionThe purpose of this utility model provides a kind of waste heat that takes full advantage of cement kiln flue gas, the cascade utilization of the realization cement kiln energy, high temperature heat source generating and low-temperature heat source are combustion-supporting, improve the cement kiln oxygen-enriched combustion-supporting system of efficiency of combustion, reduction coal consumption, raising flame temperature and raising grog product quality when the waste heat energy takes full advantage of.
The utility model mainly includes oxygen enrichment generating means, air mixing device, air preheater.Wherein, the oxygen enrichment generating means can be deep cooling oxygen enrichment generating means, film oxygen enriching generating means or transformation absorption oxygen enrichment generating means.The oxygen enrichment outlet of above-mentioned oxygen enrichment generating means links to each other with the oxygen enrichment entrance of air mixing device by pipeline, the air intake of this air mixing device links to each other with the air preheater air outlet slit, this air preheater air intake can link to each other with blower export, also can directly link to each other with atmosphere by air filter; This air preheater thermal medium import links to each other with the outlet of exhaust gas source, and this exhaust gas source can be outlet flue gas or other waste gas resource of bypass waste heat boiler, kiln hood waste heat boiler, kiln tail waste heat boiler, as coal dust wind etc.Each needs oxygen supply mechanism to link to each other with cement kiln respectively in the outlet of above-mentioned air mixing device.Because each needs the content difference of oxygen supply mechanism requisite oxygen cement kiln, preferably air mixing device is n, and 1≤n≤4 can be mixed into the oxygen-enriched air of variable concentrations, and each air mixing device outlet can be corresponding with a requisite oxygen mechanism, also can be corresponding with several requisite oxygen mechanism.
The course of work of the present utility model is as follows: exhaust gas source is heated to about 100 ℃ or higher by air preheater with normal air, enters into each need oxygen supply mechanism of cement kiln respectively with the oxygen-enriched air that the oxygen enrichment generating means produces after air mixing device mixes, carries out combustion-supporting.
Compared with the prior art the utility model has following advantage:
1, utilizes the waste heat of kiln heat recovery boiler discharged flue gas, carry out the preheating of combustion air, can further improve the efficient of oxygen-enriched combusting, reduce coal consumption, can comprehensively economize on coal about 2 ~ 15% by calculating the cement plant, thereby save cost.
2, owing to utilized kiln heat recovery boiler discharged flue gas waste heat to carry out the preheating of combustion air, substitute prior art and adopted electrical heating to carry out the preheating of combustion air usually, avoided electric energy loss, saved operating cost.Be example with the 2500t/d cement producing line, the kiln hood combustion air is 90000Nm
3/ h, kiln tail combustion-supporting air quantity is 135000 Nm
3/ h if adopt electrical heating, is heated to this part combustion air about 100 ℃ by 25 ℃, the electric energy that expends every day is 1946.6 degree, and is annual by work 300 days, and the electric weight that the heating combustion air expends is 583983 degree, every degree electricity is by 0.6 yuan, but 350,000 yuan of cost savings in every year.
3, can improve the oxygen-enriched air temperature, and then improve flame temperature, improve the grog product quality.
4, can reduce coal consumption, reduce cement cost, reduce the grog energy consumption.
5, the system equipment height is low, in light weight, volume is little, compact conformation, installation facility.
6, can reduce the coal dust burning-point, be conducive to the burning.
7, operation and maintenance cost are low.
8, the investment payback time is short.
Description of drawings
Fig. 1 is the flow process simplified schematic diagram of the utility model example 1.
Fig. 2 looks simplified schematic diagram for coal burner master among Fig. 1
Fig. 3 is the flow process simplified schematic diagram of the utility model example 2.
Fig. 4 is the flow process simplified schematic diagram of the utility model example 3.
Fig. 5 is the flow process simplified schematic diagram of the utility model example 4.
Fig. 6 is the flow process simplified schematic diagram of the utility model example 5.
Fig. 7 is the flow process simplified schematic diagram of the utility model example 6.
Drawing reference numeral: 1-deep cooling oxygen enrichment generating means, 2-air mixing device A, the 3-powdered coal burner, the 4-kiln hood, the 5-rotary kiln, the 6-dore furnace, the 7-air preheater, the 8-air blast, 9-oil gun (gas) pipe, wind of 10-, 11-oxygen enrichment nozzle, 12-secondary wind, 13-air mixing device B, 14-bypass waste heat boiler, the 15-kiln hood waste heat boiler, the 16-kiln tail waste heat boiler, 17-cement kiln cyclone preheater, 18-film oxygen enriching generating means, 19-transformation absorption oxygen enrichment generating means, 20-oxygen enrichment arm, 21-cooling machine.
The specific embodiment
In a kind of cement kiln oxygen-enriched combustion-supporting system flow simplified schematic diagram shown in Figure 1, the kiln hood of rotary kiln front portion is provided with powdered coal burner, and the kiln tail at rotary kiln rear portion is provided with dore furnace.The oxygen enrichment outlet of deep cooling oxygen enrichment generating means links to each other with the oxygen enrichment entrance of air mixing device A by pipeline, the air intake of this air mixing device A links to each other with the air preheater air outlet slit by the pipeline that is provided with control valve, this air preheater air intake links to each other with blower export, this air preheater gas approach links to each other with the bypass exhaust-heat boiler flue gas outlet that is provided with control valve, and this bypass exhaust-heat boiler inlet flue gas is from the cement kiln tail dore furnace.Powdered coal burner as shown in Figure 2, oil gun (gas) pipe that the center has control valve connects an oxygen enrichment arm that has control valve, the outlet of above-mentioned air mixing device A links to each other with this oxygen enrichment arm, is about 35～40% oxygen-enriched air for it provides oxygen concentration.During igniting, open the control valve on oil gun (gas) pipe, close the control valve on oil gun (gas) the pipe oxygen enrichment arm.After the burner normal combustion, open the control valve on oil gun (gas) the pipe oxygen enrichment arm, close the control valve on oil gun (gas) pipe.The outlet of above-mentioned oxygen enrichment generating means also links to each other with the oxygen enrichment entrance of air mixing device B simultaneously, the air intake of this air mixing device B links to each other with the air preheater air outlet slit by the pipeline that is provided with control valve, the outlet of this air mixing device B is that wind of burner, kiln hood secondary wind and the oxygen enrichment nozzle that is arranged on kiln hood, the dore furnace link to each other with several aerobic mechanisms respectively, is about 25～30% oxygen-enriched air for it provides oxygen concentration.Kiln hood secondary wind derives from cooling machine cooling air.
In the flow process simplified schematic diagram of shown in Figure 3 a kind of cement kiln oxygen-enriched combustion-supporting system, the kiln hood of rotary kiln front portion is provided with powdered coal burner, and the kiln tail at rotary kiln rear portion is provided with dore furnace.The oxygen enrichment outlet of film oxygen enriching generating means links to each other with the oxygen enrichment entrance of air mixing device A by pipeline, the air intake of this air mixing device links to each other with the air preheater air outlet slit by the pipeline that is provided with control valve, this air preheater air intake links to each other with blower export, this air preheater gas approach links to each other with the kiln hood waste heat boiler exhanst gas outlet that is provided with control valve, and this kiln hood waste heat boiler inlet flue gas is from kiln hood cooling machine cooling air.Oil gun (gas) pipe that the powdered coal burner center has control valve connects an oxygen enrichment arm that has control valve, and the outlet of above-mentioned air mixing device A links to each other with this oxygen enrichment arm, is about 35～40% oxygen-enriched air for it provides oxygen concentration.
In the flow process simplified schematic diagram of shown in Figure 4 a kind of cement kiln oxygen-enriched combustion-supporting system, the kiln hood of rotary kiln front portion is provided with powdered coal burner, and the kiln tail at rotary kiln rear portion is provided with dore furnace, cement kiln cyclone preheater.The oxygen enrichment outlet of transformation absorption oxygen enrichment generating means links to each other with the oxygen enrichment entrance of air mixing device B by pipeline, the air intake of this air mixing device links to each other with the air preheater air outlet slit by the pipeline that is provided with control valve, this air preheater air intake links to each other with blower export, this air preheater gas approach links to each other with the kiln tail waste heat boiler exhanst gas outlet that is provided with control valve, and this kiln tail waste heat boiler inlet flue gas exports from the cement kiln cyclone preheater.Wind facies of the outlet of above-mentioned air mixing device B and powdered coal burner connects, and is about 25～30% oxygen-enriched air for it provides oxygen concentration.
In the flow process simplified schematic diagram of shown in Figure 5 a kind of cement kiln oxygen-enriched combustion-supporting system, the kiln hood of rotary kiln front portion is provided with powdered coal burner, and the kiln tail at rotary kiln rear portion is provided with dore furnace, cement kiln cyclone preheater.The oxygen enrichment outlet of transformation absorption oxygen enrichment generating means links to each other with the oxygen enrichment entrance of air mixing device B by pipeline, the air intake of this air mixing device links to each other with the air preheater air outlet slit by the pipeline that is provided with control valve, this air preheater air intake links to each other with blower export, this air preheater gas approach links to each other with the kiln tail waste heat boiler exhanst gas outlet that is provided with control valve, and this kiln tail waste heat boiler inlet flue gas exports from the cement kiln cyclone preheater.The outlet of above-mentioned air mixing device B connects with the kiln hood secondary wind facies of cooling cooling machine, is about 25～30% oxygen-enriched air for it provides oxygen concentration.Kiln hood secondary wind derives from cooling machine cooling air.
In the flow process simplified schematic diagram of shown in Figure 6 a kind of cement kiln oxygen-enriched combustion-supporting system, the kiln hood of rotary kiln front portion is provided with powdered coal burner, and the kiln tail at rotary kiln rear portion is provided with dore furnace, cement kiln cyclone preheater.The oxygen enrichment outlet of transformation absorption oxygen enrichment generating means links to each other with the oxygen enrichment entrance of air mixing device B by pipeline, the air intake of this air mixing device links to each other with the air preheater air outlet slit by the pipeline that is provided with control valve, this air preheater air intake links to each other with blower export, this air preheater gas approach links to each other with the kiln tail waste heat boiler exhanst gas outlet that is provided with control valve, and this kiln tail waste heat boiler inlet flue gas is from the cement kiln cyclone preheater.The outlet of above-mentioned air mixing device B links to each other with kiln tail dore furnace, is about 25～30% oxygen-enriched air for it provides oxygen concentration.
In the flow process simplified schematic diagram of shown in Figure 7 a kind of cement kiln oxygen-enriched combustion-supporting system, the kiln hood of rotary kiln front portion is provided with powdered coal burner, and the kiln tail at rotary kiln rear portion is provided with dore furnace, cement kiln cyclone preheater.The oxygen enrichment outlet of transformation absorption oxygen enrichment generating means links to each other with the oxygen enrichment entrance of air mixing device B by pipeline, the air intake of this air mixing device links to each other with the air preheater air outlet slit by the pipeline that is provided with control valve, this air preheater air intake links to each other with blower export, this air preheater gas approach links to each other with the kiln tail waste heat boiler exhanst gas outlet that is provided with control valve, and this kiln tail waste heat boiler inlet flue gas is from the cement kiln cyclone preheater.The outlet of above-mentioned air mixing device B links to each other with the oxygen enrichment nozzle, is about 25～30% oxygen-enriched air for it provides oxygen concentration.
Claims (5)
1. cement kiln oxygen-enriched combustion-supporting system, it is characterized in that: the oxygen enrichment outlet of oxygen enrichment generating means links to each other with the oxygen enrichment entrance of air mixing device by pipeline, the air intake of this air mixing device links to each other with the air preheater air outlet slit, this air preheater thermal medium import links to each other with the outlet of exhaust gas source, and each needs oxygen supply mechanism to link to each other with cement kiln respectively in the outlet of above-mentioned air mixing device.
2. a kind of cement kiln oxygen-enriched combustion-supporting according to claim 1 system, it is characterized in that: the oxygen enrichment generating means can be deep cooling oxygen enrichment generating means, film oxygen enriching generating means or transformation absorption oxygen enrichment generating means.
3. a kind of cement kiln oxygen-enriched combustion-supporting according to claim 1 system, it is characterized in that: this exhaust gas source can be outlet flue gas or the coal dust wind waste gas resource of bypass waste heat boiler, kiln hood waste heat boiler, kiln tail waste heat boiler.
4. a kind of cement kiln oxygen-enriched combustion-supporting according to claim 1 system, it is characterized in that: air mixing device is n, 1≤n≤4.
5. a kind of cement kiln oxygen-enriched combustion-supporting according to claim 1 system, it is characterized in that: described each air mixing device outlet can be corresponding with a requisite oxygen mechanism, also can be corresponding with several requisite oxygen mechanism.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013200942121U CN203177200U (en) | 2013-03-01 | 2013-03-01 | Cement kiln oxygen-enriched combustion-supporting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013200942121U CN203177200U (en) | 2013-03-01 | 2013-03-01 | Cement kiln oxygen-enriched combustion-supporting system |
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| CN203177200U true CN203177200U (en) | 2013-09-04 |
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| CN2013200942121U Expired - Fee Related CN203177200U (en) | 2013-03-01 | 2013-03-01 | Cement kiln oxygen-enriched combustion-supporting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175211A (en) * | 2013-03-01 | 2013-06-26 | 大连易世达新能源发展股份有限公司 | Cement kiln oxygen enrichment combustion-supporting system |
| CN104132337A (en) * | 2014-08-06 | 2014-11-05 | 刘国忠 | Multi-channel cement oxygen enrichment low-carbon burner |
-
2013
- 2013-03-01 CN CN2013200942121U patent/CN203177200U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175211A (en) * | 2013-03-01 | 2013-06-26 | 大连易世达新能源发展股份有限公司 | Cement kiln oxygen enrichment combustion-supporting system |
| CN104132337A (en) * | 2014-08-06 | 2014-11-05 | 刘国忠 | Multi-channel cement oxygen enrichment low-carbon burner |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Floor 20, block B, No. 32a, Torch Road, high tech Industrial Park, Dalian, Liaoning Province, 116000 Patentee after: Lida Group Co., Ltd Address before: 116023, B building, No. 32, Torch Road, Dalian hi tech Zone, Liaoning, 18 Patentee before: DALIAN EAST NEW ENERGY DEVELOPMENT Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20210301 |