CN201458983U - Dry-method cement clinker sintering equipment - Google Patents
Dry-method cement clinker sintering equipment Download PDFInfo
- Publication number
- CN201458983U CN201458983U CN2009200126150U CN200920012615U CN201458983U CN 201458983 U CN201458983 U CN 201458983U CN 2009200126150 U CN2009200126150 U CN 2009200126150U CN 200920012615 U CN200920012615 U CN 200920012615U CN 201458983 U CN201458983 U CN 201458983U
- Authority
- CN
- China
- Prior art keywords
- oxygen
- communicated
- rotary kiln
- decomposing furnace
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004568 cement Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title abstract description 6
- 238000005245 sintering Methods 0.000 title abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 54
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 53
- 239000001301 oxygen Substances 0.000 claims abstract description 53
- 239000003245 coal Substances 0.000 claims abstract description 28
- 238000001035 drying Methods 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 25
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000005507 spraying Methods 0.000 abstract 3
- 239000000446 fuel Substances 0.000 description 8
- 238000010010 raising Methods 0.000 description 8
- 238000012546 transfer Methods 0.000 description 8
- 239000002817 coal dust Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 235000019634 flavors Nutrition 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000796 flavoring agent Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
Images
Classifications
-
- 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
The utility model provides dry-method cement clinker sintering equipment. The dry-method cement clinker sintering equipment comprises a clinker cooling machine, a rotary kiln, a decomposing furnace and a primary heater which are sequentially communicated with each other. Three air pipes communicated with the output end of a heat exchanger of the clinker cooling machine are respectively communicated into the rotary kiln, a coal spraying pipe for the rotary kiln, and the decomposing furnace. The output end of an output oxygen-rich pipe of an oxygen-rich source is respectively communicated with the side direction of a primary air pipe of the coal spraying pipe, with the rotary kiln, with a tertiary air pipe communicated into the decomposing furnace, and with the decomposing furnace. Rich oxygen is added in secondary air of the kiln head and in primary air of the coal spraying pipe, so as to ensure the supply of enough oxygen at the main combustion stage, thereby ensuring complete combustion. As the oxygen-rich output end is communicated with the side faces of the air pipes, the optimal combustion state can be adjusted without changing the original operation.
Description
Technical field: the present invention relates to dry-process cement clinker and burn till equipment, is the employed equipment that burns till of cement clinker sintering technology, mainly is that rotary kiln burns till equipment and supporting chamotte cooler thereof, decomposing furnace, preheater etc.
Background technology: existing dry-process cement clinker burns till equipment, and chamotte cooler, rotary kiln, decomposing furnace, the preheater of UNICOM are successively arranged.Its airduct that is communicated with chamotte cooler interchanger output terminal feeds rotary kiln, rotary kiln coal powder injection pipe.The airduct irrational distribution that this equipment is carried.Also there is proposition to feed thermal technology's conversion unit, but do not propose how to feed effectively to utilize oxygen rich gas, do not influence using and operating of original equipment with oxygen rich gas.
Summary of the invention:
The present invention seeks to overcome in the prior art, participate in incendiary oxygen part unreasonable distribution, the pulverized coal fuel burning is insufficient, production efficiency technical problem comparatively, it is reasonable to provide a kind of oxygen to participate in sufficient combustion, be convenient to oxygen and feed operation, the dry-process cement clinker that fully improves the pulverized coal fuel efficiency of combustion burns till equipment.
Dry-process cement clinker of the present invention burns till equipment, chamotte cooler, rotary kiln, decomposing furnace, the preheater of UNICOM are successively arranged, be communicated with three transportation work style pipes with chamotte cooler interchanger output terminal and feed rotary kiln, rotary kiln respectively with coal powder injection pipe, decomposing furnace, the output oxygen enrichment pipe output terminal of oxygen rich source is communicated with, is communicated with decomposing furnace with the tertiary-air pipe that feeds decomposing furnace respectively with an airduct side direction UNICOM of coal powder injection pipe, be communicated with rotary kiln.The tertiary-air pipe that preferably feeds decomposing furnace also is communicated with the preheater lower end.
The kiln hood coal powder injection pipe of rotary kiln is mainly rotary kiln heat output is provided, so oxygen enrichment is added in the secondary air of kiln hood and in coal powder injection pipe wind, at the main combustion phases competent oxygen of just guaranteeing supply, guarantees sufficient combustion.Unnecessary oxygen can also and not have the reaction of incendiary coal dust on a small quantity at follow-up kiln tail and decomposing furnace.Main is that oxygen-rich output end is communicated with the airduct side, does not need extra power just oxygen rich gas can be transported in the kiln, does not change original operation, and can guarantee feed rate.Particularly the output oxygen enrichment pipe racks that needs only in oxygen rich source has regulated valve, just can conveniently adjust to best proportional quantity and best state of combustion.This measure also proves by tentative experiment: oxygen-enriched combusting is fairly obvious to the raising effect of the combustionvelocity of fuel and after-flame degree, is to shorten firing time, and improving the calcining yield and quality provides necessary guarantee and may; Can improve flame temperature, flame blackness and radiant heat like this, can reduce coefficient of excess air, the prolong smoke residence time again, make more abundant, the burning more completely of coal dust, thereby can improve cement quality, reduce the discharging of flue dust and obnoxious flavour etc. and can reduce funnel temperature etc.
This is because oxygen-enriched combusting can not only make shorten greatly the combustion time of fuel, helps improving the perfect combustion degree of fuel, and can also improve flame temperature and blackness, thereby improve the interior heat transfer condition of kiln, the output of kiln is improved, hear rate decline.Adopt the oxygenized air combustion supporting coal gangue to produce cement and carried out technical economical analysis; Our investigation by for many years and analyze after also think, the oxygen-enriched combustion-supporting technology, the energy-saving and emission-reduction that are used for cement kiln are significant equally.Unit-hour output as cement rotary kiln is 26t/h.Coal consumption is the 0.25kg/kg grog, per hour burns coal amount 6500kg, and the excess air coefficient of zone of combustion is 1.1.Coal-fired theoretical air requirement is 6Nm3/kg (coal).
Find out thus, need contain O2 and be 21% air capacity:
V＝26000×0.25×6×1.1＝42900Nm3/h
At this airborne oxygen level=42900 * 21%=9009Nm3/h. when concentration of oxygen is increased to 25% in the air, required air capacity has then reduced by 16%. N2 that enter the combustion chamber and has measured corresponding decline 20%, make the cumulative volume of flame descend, under the constant situation of the add-on of fuel, flame temperature improves, the degree that improves depends primarily on the concentration of oxygen in the air, when concentration of oxygen reaches 25% in the air, as calculated, flame temperature can improve about 100 ℃. and reduce because of going into the kiln air capacity in addition, make CO in the flame
2Raise with the concentration of volume percent of H2O.The also corresponding increase of the blackness of flame.Learn that according to calculating when oxygen level in the combustion air was 25%, the concentration expressed in percentage by volume of CO2 improved 17.5%, the corresponding raising 17.7% of the concentration expressed in percentage by volume of water vapor is because CO2 and H
2The concentration of O all increases many, and the corresponding increase of the blackness of flame is when concentration of oxygen in the air is 21%, the blackness of flame is 0.2104 as calculated, when concentration of oxygen in the air was 25%, the blackness of flame was 0.2245 as calculated, the degree of increase about 6.7%.Flame should be 20.4% as calculated to the degree of the radiative transfer amount raising of material, all corresponding raisings of radiative transfer amount of other each bands of rotary kiln, and the amplitude of raising can not differ greatly.
In a word, oxygen-enriched combustion technology scheme of the present invention is used for cement kiln, can improve the burning of coal condition, shortens the required time of burning, realizes the perfect combustion of fuel, simultaneously rate of heat transfer is increased substantially.In addition, adopt oxygen-enriched combusting, the generation of obnoxious flavoures such as discharge amount of exhaust gas and CO, NOx is descended, help energy-saving and emission-reduction.
Description of drawings: accompanying drawing has represented that a kind of the present invention produces 5000 tons dry-process cement clinker daily and burns till the equipment synoptic diagram.The present invention is further described below in conjunction with the accompanying drawing example.
Embodiment:
A kind of the present invention produce daily 5000 tons dry-process cement clinker burn till equipment, chamotte cooler 1, rotary kiln 3, decomposing furnace 8, the preheater 7 of UNICOM are successively arranged, be communicated with three transportation work style pipes 9,15 with chamotte cooler interchanger output terminal and feed rotary kiln, rotary kiln respectively with coal powder injection pipe, decomposing furnace, output oxygen enrichment pipe 15,14,11,9 output terminals of oxygen rich source 16 are communicated with, are communicated with decomposing furnace 8 with the tertiary-air pipe 10 that feeds decomposing furnace respectively with an airduct 13 side direction UNICOMs of coal powder injection pipe, be communicated with rotary kiln 3.The tertiary-air pipe 10 that preferably feeds decomposing furnace also is communicated with preheater 7 lower ends.Rotary kiln is communicated with chamotte cooler by kiln hood cover 12, and the kiln tail smoke-box 4 of rotary kiln is communicated with the decomposing furnace lower end by pipeline, and the upper end of decomposing furnace is communicated with preheater by pipeline.According to the practical situation of site inspection, the cover embrane method oxygen-enriched combustion-supporting system that designed is used for dry-process cement clinker and burns till equipment as oxygen rich source.Form the negative pressure technical process have that energy consumption is lower, pre-treatment is simple, easy to operate and safe, only machine/pump need regular maintenance, miscellaneous equipment is all non-maintaining, the core oxygen-enriched membrane component is not only non-maintaining but also the life-span can reach about 10 years, advantages such as gross investment is few, energy-saving and emission-reduction remarkable benefit.The film oxygen enriching combustion-supporting system have related parameter and the economic performance assessment criteria of major technique as follows:
◎ oxygen-rich concentration: 27-30%;
◎ oxygen enrichment flow: 5000 ± 10%Nm3/h;
◎ oxygen enrichment distribution: 437KW;
◎ quantity of circulating water: 42m3/hr (only water ring vacuum pump cooling usefulness does not consume substantially);
◎ floor space: 50M
2
After ◎ uses film oxygen enriching auxiliary combustion equipment, technology, product production and quality all obviously improve, the qualified product energy consumption decline 5-10% of unit, oxygen level improves 1%, and the degree that cement rotary kiln zone of combustion flame improves the radiative transfer amount of material is 5.1%, combustion air volume and blast all reduces more than 6%, funnel temperature descends more than 7 ℃.
5000 tons of manufacture of cement of daily output of the present invention, about 850 tons in consumption coal.Kiln hood and kiln tail consume respectively about coal 40 and 60%, and the kiln hood secondary air probably accounts for 90%, and wind-warm syndrome reaches about 1000 ℃, smoke evacuation oxygen level 6-9%, and about 340 ℃ of funnel temperatures, oxynitride is in the 280-400ppm scope.
China totally piles up more than 20 hundred million tons of coal gangues at present, and also increase more than 100,000,000 ton every year. this had both occupied many stackings place, influence environment, pollute, causing a large amount of energy and the wasting of resources again. wide-scale adoption oxygen-rich air burning gangue is produced cement, complete place of cement production fat coal. both utilized the carbon content of coal gangue, the heat that provides cement production process to need, slag stone composition (mainly being SiO2 etc.) in the coal gangue is changed among the cement, substitute for clay becomes the effective constituent of cement. but also make the quality of cement increase conserve energy, reaching comprehensive utilization, is the good job of achieving many things at one stroke.
Adopt the oxygenized air combustion supporting coal gangue to produce cement,, select suitable oxygen-rich air concentration according to the carbon content of coal gangue, can guarantee that combustion processes is stable, not flame-out, can reach the heat that cement production process needs again, be the fabulous approach that solves a large amount of coal gangue outlets.Along with the raising of oxygen-rich concentration, shorten the combustion time of coal dust.Bring up at 25% o'clock as the concentration of oxygen enrichment, can shorten about 16% the combustion time of coal dust.Under the constant situation of bulk, because the shortening of coal dust tail-off time, the degree of coal dust after-flame improves naturally, and the calorific loss that incomplete combustion caused that this has just reduced coal dust reaches purpose of energy saving.The also corresponding minimizing of obnoxious flavour such as CO, NOx growing amount in addition helps environmental protection.
Flame is radiative transfer to the main mode that material conducts heat in cement rotary kiln, and airstream in kiln depends primarily on the blackness of the air temperature and current of air-flow to the radiative transfer speed of material, the two is high more, and the radiative transfer amount is just many more, and this can reach this purpose by oxygen-enriched combusting.Owing to concentration of oxygen in the air improves, the corresponding air capacity that reduces makes the N2 amount that enters the combustion chamber descend, the cumulative volume decline of flame (volumetric flow rate that is flame descends).Under the constant situation of the add-on of fuel, the corresponding raising of the temperature of flame, the degree of raising depends primarily on concentration of oxygen in the air.
Claims (3)
1. a dry-process cement clinker burns till equipment, chamotte cooler, rotary kiln, decomposing furnace, the preheater of UNICOM are successively arranged, it is characterized in that: be communicated with three transportation work style pipes with chamotte cooler interchanger output terminal and feed rotary kiln, rotary kiln respectively with coal powder injection pipe, decomposing furnace, the output oxygen enrichment pipe output terminal of oxygen rich source is communicated with, is communicated with decomposing furnace with the tertiary-air pipe that feeds decomposing furnace respectively with an airduct side direction UNICOM of coal powder injection pipe, be communicated with rotary kiln.
2. burn till equipment as the said dry-process cement clinker of claim 1, it is characterized in that: the output oxygen enrichment pipe racks of oxygen rich source has regulated valve.
3. burn till equipment as claim 1 or 2 said dry-process cement clinkers, it is characterized in that: the tertiary-air pipe that feeds decomposing furnace also is communicated with the preheater lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200126150U CN201458983U (en) | 2009-03-31 | 2009-03-31 | Dry-method cement clinker sintering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200126150U CN201458983U (en) | 2009-03-31 | 2009-03-31 | Dry-method cement clinker sintering equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201458983U true CN201458983U (en) | 2010-05-12 |
Family
ID=42386336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200126150U Expired - Fee Related CN201458983U (en) | 2009-03-31 | 2009-03-31 | Dry-method cement clinker sintering equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201458983U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173617A (en) * | 2011-01-26 | 2011-09-07 | 赵军政 | High-efficiency energy-saving environmental-protection cement making machine set |
| CN110160366A (en) * | 2019-06-20 | 2019-08-23 | 四川省兴威钒业有限公司 | A kind of clinker cooling system reform equipment |
| CN112393597A (en) * | 2019-08-12 | 2021-02-23 | 天津水泥工业设计研究院有限公司 | Cement firing system and method based on pure oxygen combustion |
-
2009
- 2009-03-31 CN CN2009200126150U patent/CN201458983U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102173617A (en) * | 2011-01-26 | 2011-09-07 | 赵军政 | High-efficiency energy-saving environmental-protection cement making machine set |
| CN110160366A (en) * | 2019-06-20 | 2019-08-23 | 四川省兴威钒业有限公司 | A kind of clinker cooling system reform equipment |
| CN110160366B (en) * | 2019-06-20 | 2020-05-05 | 四川省兴威钒业有限公司 | Grog cooling system reforms transform equipment |
| CN112393597A (en) * | 2019-08-12 | 2021-02-23 | 天津水泥工业设计研究院有限公司 | Cement firing system and method based on pure oxygen combustion |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101851073A (en) | Equipment for baking cement clinker by dry method | |
| CN201245560Y (en) | Cocurrent heat storing type dual-chamber limekiln capable of realizing two-stage calcination | |
| CN109574523B (en) | Lime kiln for directly burning high-temperature coal gas of gasification furnace in hot feeding manner | |
| CN109437608B (en) | Double-path air built-in heat exchanger lime shaft kiln and calcining method thereof | |
| CN105366964A (en) | Lime-coke-calcium carbide production joint apparatus | |
| CN102001837A (en) | Method and device for calcining materials by using low calorific value fuel | |
| CN105731838A (en) | Calcination device and method for preparing light calcined magnesia through magnesite ore | |
| CN201458983U (en) | Dry-method cement clinker sintering equipment | |
| CN115340304A (en) | Device and method for producing light-burned magnesium oxide through decomposition outside five-stage suspension preheating kiln | |
| CN114151785B (en) | Carbon-based oxygen-enriched combustion and CO of coal-fired boiler 2 Trapping and utilizing process | |
| CN103496863A (en) | Production method of cement clinker by calcination with oxygen-rich reinforced lignite | |
| CN105509469A (en) | Low-oxynitride decomposition furnace with precombustion furnace | |
| CN102745914B (en) | Roasting process for active lime in rotary kiln | |
| CN202157013U (en) | Novel environment-friendly and energy-saving limekiln | |
| CN204265644U (en) | Heat storage type lime rotary kiln | |
| CN103232178A (en) | Method for high-concentration recovery for CO2 gas during cement production process | |
| CN104496207A (en) | Heat accumulating type lime rotary kiln | |
| CN100344568C (en) | Cement clinker sintering technology and its equipment | |
| CN101195521B (en) | Method for producing margin coal gas by using steel in rotary cement kiln predecomposition furnace | |
| CN203612951U (en) | Oxygen supply device for oxygen-enrichedcombustion of rotary kiln burner | |
| CN209685619U (en) | A kind of limekiln that the hot sending of gasification furnace coal gas of high temperature is directly burnt | |
| CN202193731U (en) | Flue gas waste heat double-circulating gas burning lime kiln | |
| CN202599095U (en) | Energy-saving sintering kiln body | |
| CN104211308B (en) | A kind of dividing wall type material calcining device | |
| CN204125384U (en) | A kind of dividing wall type material calcining device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model |
Correction item: Inventor Correct: Liu Jianjun False: Liu Jianjun Number: 19 Page: The title page Volume: 26 |
|
| CU03 | Publication of corrected utility model |
Correction item: Inventor Correct: Liu Jianjun False: Liu Jianjun Number: 19 Volume: 26 |
|
| 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: 20100512 Termination date: 20180331 |