CN103449742A - Lime kiln for spraying and blowing coal powder to calcine - Google Patents
Lime kiln for spraying and blowing coal powder to calcine Download PDFInfo
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- CN103449742A CN103449742A CN2012101820189A CN201210182018A CN103449742A CN 103449742 A CN103449742 A CN 103449742A CN 2012101820189 A CN2012101820189 A CN 2012101820189A CN 201210182018 A CN201210182018 A CN 201210182018A CN 103449742 A CN103449742 A CN 103449742A
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- induced draft
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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
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The invention discloses a lime kiln for spraying and blowing coal powder to calcine. The lime kiln comprises a shaft kiln, an induced draft fan, a fire spraying nozzle, a spiral extrusion coal conveyer, a bucket type elevator, a spiral-cone ash discharging machine, a thermocouple and an automatic control system, wherein the shaft kiln is internally divided into a preheating zone, a calcining zone and a cooling zone from top to bottom. Cold air is guided out by the induced draft fan outside the kiln after the cooling zone is heated by high temperature of 600 DEG C, carries coal powder conveyed by the spiral extrusion coal conveyer, and is then blown into the fire spraying nozzle; the fire spraying nozzle generates high-temperature flame and blows the high-temperature flame into the calcining zone. The thermocouple monitors the temperature of the calcining zone, transfers the temperature to the automatic control system, controls the rotating speed of the induced draft fan and the spiral extrusion coal conveyer and controls the air quantity and the coal quantity entering the calcining zone so as to keep the temperature of the calcining zone to be 900-1250 DEG C. Calcium carbonate stone blocks with the particle diameter from 20mm to 60mm are contained into the kiln from the top part of the kiln by the bucket type elevator, the calcium carbonate is completely decomposed at the calcining zone, and the generated calcium oxide is discharged out of the kiln by the spiral-cone ash discharging machine after being cooled at the cooling zone.
Description
Technical field
The present invention relates to a kind of coal injection calcination lime burner, specifically relate to a kind of limestone kiln that is blown into the coal dust lime kilning from erectting calcining zone bottom, limestone kiln.The present invention, by transformation air intake and the granularity of advancing coal position and coal, reduces and loses carbon, increases the fuel surface activity, reaches regulation and control timely convenient, fuel economy, the purpose of gas concentration lwevel in raising tail gas.
Background technology
The burning coal used is at present erect limestone kiln, is all with chapelet, stone and lump coal to be loaded in mixture into kiln from Yao Ding, through preheating, calcining, cooling, finally at the bottom of kiln, obtains lime block.Gas blower enters cold wind from the kiln bottom blowing, at cooling zone, absorbs heat, and wind-warm syndrome is raised to 600 ℃, and the lump coal generation chemical reaction after calcining zone and preheating, emit amount of heat, makes the stone after preheating reach 900-1250 ℃ at calcining zone, the generation decomposition reaction:
C+O
2=CO
2+ heat
Generate calcium oxide and carbonic acid gas.
Preheating zone, calcining zone, cooling zone in heat exchange are installed respectively three thermopairs, monitor this regional temperature, for the charging formula provides foundation.The information that monitoring obtains is with the charging formula and implement to have the very large time difference, and the deviation of correcting a formula need to be paid kiln and push up calcining zone flow required stone and the costs such as lump coal and air blast electricity consumption.
Lump coal is packed into from Yao Ding, while being preheating to 800 ℃, very easily with the carbonic acid gas of calcining zone lump coal burning generation and the carbonic acid gas of Decomposition of Calcium Carbonate generation, reacts:
Cause the adverse consequences of calcining zone short bunker and preheating zone cooling.The calcining zone short bunker, certainly lead to the raw burn phenomenon.In formula, erosion carbon is reserved excessive, can cause burn-off phenomenon again.In a word, fuel is packed into from Yao Ding, and kiln temperature is wayward, and erosion carbon is inevitable, and difficulty is corrected in the raw burn burning, and in tail gas, gas concentration lwevel can't improve.
Summary of the invention
The purpose of this invention is to provide a kind of shaft furnace that is blown into the coal dust lime kilning from the calcining zone bottom, draw the hot blast of 600 ℃ from cooling zone with induced draft fan, the defeated next coal dust of winding-up screw extrusion coal conveyor, from bocca, thermal-flame is blown into to calcining zone, the coal dust perfect combustion that is configured to of air quantity and coal dust is as the criterion, the two overall control kiln temperature, the information automatic control motor rotating speed provided by thermopair, control air quantity and coal amount, make calcining belt temperature remain on 900-1250 ℃.
Limestone particle size 20-60mm, go out CaO once in every 30 minutes.
Coal injection calcination lime burner of the present invention is comprised of shaft furnace, induced draft fan, bocca, screw extrusion coal conveyor, chapelet, auger bit ash hoist, thermopair, automatic control system.Shaft furnace is high 30 meters, 5 meters of housing diameters, 1.8 meters of liner diameters, Fen Sange district in kiln, preheating zone, calcining zone, cooling zone.
Described coal injection calcination lime burner comprises shaft furnace (1), induced draft fan (2), bocca (3), screw extrusion coal conveyor (4), chapelet (5), auger bit ash hoist (6), thermopair (7), automatic control system (8), shaft furnace from top to bottom divides preheating zone in (1), calcining zone and cooling zone, open 4 mouths in shaft furnace (1) calcining zone bottom and cooling zone top respectively, 4 induced draft fans (2) are installed, 4 boccas (3) stretch into the interior calcining zone of shaft furnace (1) bottom, cold wind after cooling zone obtains 600 ℃ of high temperature by kiln outside induced draft fan (2) draw, carry the defeated next coal dust of screw extrusion coal conveyor (4), be blown into bocca (3), bocca (3) produces thermal-flame, be blown into calcining zone.Thermopair (7) monitoring calcining belt temperature also passes to automatic control system (8), control the rotating speed of induced draft fan (2) and screw extrusion coal conveyor (4), control enters air quantity and the coal amount of calcining zone, makes the temperature of calcining zone remain on 900-1250 ℃.In chapelet (5) is packed the calcium carbonate stone of particle diameter 20-60mm into kiln from Yao Ding, calcium carbonate decomposes fully at calcining zone after preheating, the calcium oxide of generation after cooling zone is cooling by auger bit ash hoist (6) kiln discharge.
The accompanying drawing explanation
The profile figure that figure is the coal injection calcination lime burner
1. shaft furnace 2. induced draft fan 3. bocca 4. screw extrusion coal conveyor 5. chapelet 6. auger bit ash hoist 7. thermopair 8. automatic control systems in figure
Specific embodiments
Open 4 mouths in shaft furnace (1) calcining zone bottom and cooling zone top respectively, 4 induced draft fans (2) are installed, 4 boccas (3), bocca (3) stretches into the interior calcining zone of shaft furnace (1) bottom, screw extrusion coal conveyor (4) is installed between bocca (3) and induced draft fan (2), induced draft fan is drawn the hot blast of 600 ℃ from shaft furnace (1) cooling zone, carry the defeated next coal dust of screw extrusion coal conveyor (4), be blown into bocca (3), bocca (3) is blown into thermal-flame the calcining zone of shaft furnace (1).Thermopair (7) monitoring calcining belt temperature also passes to automatic control system (8), controlled the rotating speed of induced draft fan (2) and screw extrusion coal conveyor (4) by automatic control system (8), control enters air quantity and the coal amount of calcining zone, makes the temperature of calcining zone remain on 900-1250 ℃.
Beneficial effect
1, feed back in time the information of thermopair transmission and correct the deviation occurred in kiln, stopping raw burn and burn-off phenomenon.
2. avoid losing the carbon phenomenon and occur, fuel economy.
3. lump coal changes coal dust into, reduces fuel cost.
4. need to reclaim the enterprise of carbonic acid gas, can obtain the tail gas of high concentration carbon dioxide.
5. coal dust enters from calcining zone, reduces lift height, save energy.
Claims (4)
1. a coal injection calcination lime burner, comprise shaft furnace (1), induced draft fan (2), bocca (3), screw extrusion coal conveyor (4), chapelet (5), auger bit ash hoist (6), thermopair (7), automatic control system (8), it is characterized in that in shaft furnace from top to bottom minute preheating zone, calcining zone, cooling zone, open 4 mouths in shaft furnace (1) calcining zone bottom and cooling zone top respectively, 4 induced draft fans (2) are installed, 4 boccas (3) stretch into the interior calcining zone of shaft furnace (1) bottom, cold wind after cooling zone obtains 600 ℃ of high temperature by kiln outside induced draft fan (2) draw, carry the defeated next coal dust of screw extrusion coal conveyor (4), be blown into bocca (3), bocca (3) produces thermal-flame, be blown into calcining zone.
2. according to the described coal injection calcination lime burner of claim (1), it is characterized in that screw extrusion coal conveyor (4) is arranged between induced draft fan (2) and bocca (3), controlled into kiln coal amount by motor speed, coal dust is clamp-oned to the air outlet of induced draft fan (2).
3. according to the described coal injection calcination lime burner of claim (1), it is characterized in that thermopair (7) monitoring calcining belt temperature and pass to automatic control system (8), control the rotating speed of induced draft fan (2) and screw extrusion coal conveyor, control enters air quantity and the coal amount of calcining zone, makes the temperature of calcining zone remain on 900-1250 ℃.
4. according to the described coal injection calcination lime burner of claim (1), in chapelet (5) is packed the calcium carbonate stone of particle diameter 20-60mm into kiln from Yao Ding, calcium carbonate decomposes fully at calcining zone after preheating, the calcium oxide of generation after cooling zone is cooling by auger bit ash hoist (6) kiln discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101820189A CN103449742A (en) | 2012-05-28 | 2012-05-28 | Lime kiln for spraying and blowing coal powder to calcine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101820189A CN103449742A (en) | 2012-05-28 | 2012-05-28 | Lime kiln for spraying and blowing coal powder to calcine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103449742A true CN103449742A (en) | 2013-12-18 |
Family
ID=49732640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101820189A Pending CN103449742A (en) | 2012-05-28 | 2012-05-28 | Lime kiln for spraying and blowing coal powder to calcine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760846A (en) * | 2013-12-30 | 2014-04-30 | 石嘴山市华岳化工有限公司 | Automatic control system for environment-friendly and energy-saving co-firing lime shaft kiln |
| CN105176550A (en) * | 2015-10-28 | 2015-12-23 | 湖南炭道新能源科技有限公司 | Continuous carbonizing device and method |
| 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 |
-
2012
- 2012-05-28 CN CN2012101820189A patent/CN103449742A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760846A (en) * | 2013-12-30 | 2014-04-30 | 石嘴山市华岳化工有限公司 | Automatic control system for environment-friendly and energy-saving co-firing lime shaft kiln |
| CN105176550A (en) * | 2015-10-28 | 2015-12-23 | 湖南炭道新能源科技有限公司 | Continuous carbonizing device and method |
| 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 |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131218 |