CN102155846A - Lime roasting shaft kiln - Google Patents
Lime roasting shaft kiln Download PDFInfo
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- CN102155846A CN102155846A CN 201110106402 CN201110106402A CN102155846A CN 102155846 A CN102155846 A CN 102155846A CN 201110106402 CN201110106402 CN 201110106402 CN 201110106402 A CN201110106402 A CN 201110106402A CN 102155846 A CN102155846 A CN 102155846A
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- Prior art keywords
- kiln
- fuel
- air
- combustion chamber
- lime
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Links
- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 15
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 15
- 239000004571 lime Substances 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims abstract description 89
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000000446 fuel Substances 0.000 claims abstract description 37
- 239000000203 mixture Substances 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 7
- 239000003517 fume Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 2
- 238000001354 calcination Methods 0.000 claims 1
- 238000005422 blasting Methods 0.000 abstract 2
- 239000000779 smoke Substances 0.000 abstract 1
- 101100399296 Mus musculus Lime1 gene Proteins 0.000 description 12
- 210000000038 chest Anatomy 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 239000005997 Calcium carbide Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
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- Furnace Details (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a lime roasting shaft kiln, comprising an internal combustion fuel-free combustion chamber, fuel-air mixing jets, a fuel-air mixture inlet, a combustion chamber temperature control system, a kiln interior uniform air blasting device and a central smoke discharge device, wherein fuel-air mixtures are jetted into the internal combustion fuel-free combustion chamber through the jets arranged around the kiln, the fuel-air mixtures enter into the kiln through the fuel-air mixture inlet, high-temperature high-pressure gas, resulting from collision and combustion of two fuel-air mixtures which are jetted into the internal combustion fuel-free combustion chamber oppositely, is jetted out from the bottom of the combustion chamber and then uniformly enters materials to roast the materials, and the temperature of the combustion chamber is controlled by a combustion chamber temperature control system, and air is uniformly distributed on the section of the kiln through the kiln interior even uniform air blasting device to realize uniform material cooling and air preheating. The kiln of the invention has a simple structure and operation, low investment, wide suitability of raw fuel, low thermal consumption and high product quality.
Description
Technical field
The present invention relates to the kiln that a kind of lime industry is used, especially relate to a kind of lime-roasting shaft furnace, be mainly used to roasting metallurgy lime, chemical industry calcium carbide lime, building lime and light calcined magnesia etc., the raw material of its roasting is lime stone and magnesite, the product of its production is active lime and activated magnesia, is the important source material of metallurgical industry, chemical engineering industry and building trade.
Background technology
At present, being used for the shaft furnace of roasting lime both at home and abroad has two thorax shaft furnaces of Switzerland, the sleeve kiln of Germany, gondola oil cooling beam type kiln etc., and of home make shaft furnace has high pressure periphery burner gas-burned vertical limekiln and center burner gas-burned vertical limekiln etc.
Two thorax shaft furnaces are lime-roasting shaft furnaces that Austrian Si Mite and Huo Foer developed in nineteen fifty-seven, so this kiln also claims Si Mite-Huo Foer kiln, two thorax shaft furnaces are one of state-of-the-art in the world lime-roasting shaft furnaces at present, this kiln is made up of two identical kiln thoraxes, during one thorax roasting, another thorax preheating, its major advantage hear rate is low. and be the 850-900x4.18kj/kg. finished product, the activity of lime height is 350ml.But this kiln body complexity, burner are provided with too many and also burn out, and equipment is many, and investment is big, the power consumption height.
Telescopic shaft furnace is the lime-roasting shaft furnace that German Ka Er and Beckenbach were developed in nineteen sixty, so this kiln also claims Ka Er-Beckenbach kiln, the sleeve kiln is one of state-of-the-art in the world lime-roasting shaft furnace at present, this kiln is made up of two circular concentric kiln thoraxes, two circular sleeve content material of forming, interior circle walks to cool off the waste gas of air and fuel combustion generation.The roasting band is half contrary half same flow operation, be counter-current operation in the torrid zone.Its major advantage hear rate is low. and be the 950x4.18kj/kg. finished product, activity of lime is more than 330ml.But this kiln body and operation are very complicated, and investment is big, the power consumption height.
Gondola oil cooling beam type shaft furnace also is the Fu Kasi kiln, and this type kiln is introduced China the eighties in last century.This kiln is provided with several and inserts in the kiln with the oil cooled beam of heat conduction, and several burners reach in the kiln and in the material material carried out roasting under the protection of beam.So this kiln also claims the beam type kiln.This kiln advantage operation is simpler, and the product activity degree is greater than 330ml.But burner is provided with many, the beam easy burn-out, and beam cost height, the product hear rate is higher, greater than the 1200x4.18kj/kg.c finished product.
The nineties in last century is domestic has developed peripheral burner gas-burned vertical limekiln, and this kiln is provided with a plurality of high-pressure gas burners at its periphery, and under high pressure, flame sprays into and carries out roasting in the material.Domestic gas-burned vertical limekiln kiln body is simple, easy to operate, and cost is low, activity of lime can reach more than the 310ml, but its hear rate height reaches when especially using blast furnace gas more than the 1500x18kj/kg. finished product, section temperature is inhomogeneous in the kiln, and this kiln can only using gases fuel, and fuel tolerance is very little.
Center burner gas-burned vertical limekiln is the gas combusting limestone kiln of the development beginning of this century, has only one using at present.This kiln is established a burner at the domestic gas-burned vertical limekiln center of using at present, to solve the uneven problem of material section temperature, makes that domestic gas-burned vertical limekiln section temperature is more even, but center nozzle structure complexity is difficult for changing.Center other pluses and minuses of burner gas-burned vertical limekiln are the same with domestic gas-burned vertical limekiln.
No matter external advanced shaft furnace still is domestic gas-burned vertical limekiln, the material sintering temperature in the roasting zone of each burner control that they have a common shortcoming is the roasting band is difficult to measure and is uncontrollable, so operating personnel can not realize when sintering temperature changes, and provide timely adjustment.Have only when product quality changes by the time, adjust by experiential operating.
Summary of the invention
The present invention be to solve external advanced lime shaft kiln complex structure, operation easier is big, invests high shortcoming, it is low to solve of home make lime shaft kiln product quality simultaneously, the hear rate height, fuel tolerance is little wait not enough.
Lime-roasting shaft furnace of the present invention comprises that internal combustion does not have the material combustion chamber, the fuel-air injector mixer, the fuel air mixture import, the chamber temperature control system, even air-blast device in the kiln, the center fume extractor, fuel and air mixture spray into internal combustion by the injector that is located at the kiln periphery does not have the material combustion chamber, fuel air mixture enters in the kiln by the fuel air mixture inlet, two strands spray into internal combustion in opposite directions and do not have the high temperature and high pressure gas that fuel and the air mixture collision burning of material combustion chamber produces and spray at a high speed from the bottom, combustion chamber, enter equably in the material material is carried out roasting, and control the temperature of combustion chamber by the chamber temperature control system, by even air blast device in the kiln, air is arranged on the section of kiln uniformly, and material cooling and air preheat are even.
Lime-roasting shaft furnace of the present invention is counter-current operation mode (both flow direction of material was opposite with gas flow), and being provided with internal combustion at the roasting band does not have the material combustion chamber, and the quantity of combustion chamber is determined according to kiln output size.
So-called internal combustion does not have the material combustion chamber, promptly is that the combustion chamber is in the roasting band material and does not have material to enter in the combustion chamber.Internal combustion does not have the horizontal kiln body section that collapses in material combustion chamber, is shaped as rectangle, and two ends link to each other with injector with the kiln wall.
Fuel and air mixture spray into internal combustion by the injector that is located at the kiln periphery does not have the material combustion chamber, two strands of fuel that spraying into internal combustion does not in opposite directions have a material combustion chamber fiercely collide with air mixture, mix strongly, fierceness is burnt, the high temperature and high pressure gas that burning produces enters equably in the material material is carried out roasting from the ejection at a high speed of bottom, combustion chamber.Since the combustion chamber be evenly distributed in kiln roasting band section vertically on, it is that therefrom the mind-set both sides evenly slowly descend that the high-temperature gas transverse temperature that the combustion chamber produces distributes, eliminated " the kiln wall effect " of shaft furnace Temperature Distribution to a great extent, thereby material is heated evenly in the kiln, roasting effect is good.
Each internal combustion does not have the material combustion chamber temperature point is set, the automatic chain adjusting chamber gas temperature of chamber temperature and fuel/air mixture amount, chamber temperature is controlled in the needed temperature range of material roasting, in the combustion chamber, settle a temperature sensor, can the temperature of combustion chamber be detected in real time, and detected value is input to PLC controller (programmable logic controller), compare by PLC, while fuel, motor regulated valve all is installed on the input channel of combustion air, the aperture size of these valves is controlled by PLC, that is to say that the amount of fuel and combustion air can be controlled by PLC.The optimum temperature of a combustion chamber of PLC initial setting, the temperature value of detection compares with set temperature value at any time, according to the temperature departure direction aperture of fuel metering and combustion air control valve at any time, thereby reaches temperature auto control.
Lime-roasting shaft furnace of the present invention is provided with even air blast device in the kiln, and air is arranged on the section of kiln uniformly, and material cooling and air preheat are even.Even air blast device is made up of refractory material and metal material in the kiln, and is simple in structure.
Lime-roasting shaft furnace of the present invention also is provided with sealed scale hooper, and scale hooper is made up of hydrodynamic seal valve and electronic scale.The chain quantitative discharging of sealed scale hooper and discharging machine, load is stable.
Prove that by production practices lime shaft kiln technical advantage of the present invention is obvious:
A) compare with external shaft furnaces such as two thorax shaft furnaces, telescopic shaft furnace, oil cooling beam type shaft furnaces, kiln of the present invention is simple in structure, and internal combustion does not have the material combustion chamber across the shaft furnace section, is made up of the special refractory material.Therefore hundred million health kiln costs are lower.But product quality is basic identical, and activity degree is all about 360ml, and comprehensive energy consumption is than two thorax shaft furnaces low (is example with coal dust fuel), and kiln of the present invention is about 115t mark coal. product, and two thorax shaft furnace is about 135t mark coal. product.
B) internal combustion of kiln of the present invention does not have the material combustion chamber and is arranged in uniformly on the roasting band section of kiln, and the material section temperature is even in the kiln, uniform in quality;
C) each internal combustion of kiln of the present invention does not have material combustion chambers burn temperature and can control automatically, each combustion chamber is provided with a temperature control point, combustion chambers burn temperature height is regulated automatically by burner fuel quantity/wind supply quantity, the kiln sintering temperature is controlled in accordance with regulations the scope, product burning and underburnt phenomenon can not occur;
D) the kiln fuel scope of application of the present invention is wide, because special internal combustion do not have the material chamber structure, makes that it can use solid fuel, liquid fuel and gaseous fuel;
E) kiln raw material availability height of the present invention, but the lime stone of roasting 20-80mm scope;
F) product quality height, hear rate and power consumption are low.The combustion technology that this kiln is special makes that its hear rate is low, and the blast furnace gas hear rate is about the 800x4.18kj/kg. product; The coal dust hear rate is less than the 700x4.18kj/kg. product; The coke-stove gas hear rate is about the 750x4.18kj/kg. product.The low 15kwh/t. product that is about of power consumption;
G) equipment is simple to operate, and is easy to maintenance, and operating cost is low.
Description of drawings
Describe lime-roasting shaft furnace of the present invention in detail in conjunction with following accompanying drawing.
Fig. 1 is according to lime-roasting shaft furnace structure chart of the present invention.
Preferred implementation
With reference to Fig. 1, Fig. 1 is according to lime-roasting shaft furnace structure chart of the present invention, wherein, 1 expression kiln body, 2 expression center fume extractors, 3 expression distributing devices, 4 expression internal combustions do not have the material combustion chamber, 5 expression fuel air mixture inlets, 6 expression injectors, 7 expression chamber temperature control systems, salband combustion air preheater in the 8 expression kilns, even air-blast device in the 9 expression kilns, 10 expression discharging machines, 11 expression sealing scale hoopers.
Fuel and air mixture spray into internal combustion by the injector 6 that is located at the kiln periphery does not have material combustion chamber 4, fuel air mixture enters in the kiln by fuel air mixture inlet 5, two strands of fuel that sprays into internal combustion in opposite directions and do not have a material combustion chamber 4 fiercely collides with air mixture, mixes strongly, fierceness is burnt, the high temperature and high pressure gas that burning produces enters equably in the material material is carried out roasting from the ejection at a high speed of bottom, combustion chamber.Wherein raw material is to enter in the kiln by distributing device 3, since the combustion chamber be evenly distributed in kiln roasting band section vertically on, it is that therefrom the mind-set both sides evenly slowly descend that the high-temperature gas transverse temperature that the combustion chamber produces distributes, eliminated " the kiln wall effect " of shaft furnace Temperature Distribution to a great extent, thereby material is heated evenly in the kiln, and roasting effect is good.
Chamber temperature control system 7 is controlled the temperature of combustion chamber, if temperature is low excessively, can carry out preheating by salband combustion air preheater 8 in the kiln, only shows the temperature control system of a combustion chamber among the figure.
Each internal combustion does not have the material combustion chamber temperature point is set, the automatic chain adjusting chamber gas temperature of chamber temperature and fuel/air mixture amount, chamber temperature is controlled in the needed temperature range of material roasting, in the combustion chamber, settle a temperature sensor, can the temperature of combustion chamber be detected in real time, and detected value is input to PLC controller (programmable logic controller), compare by PLC, while fuel, motor regulated valve all is installed on the input channel of combustion air, the aperture size of these valves is controlled by PLC, that is to say that the amount of fuel and combustion air can be controlled by PLC.The optimum temperature of a combustion chamber of PLC initial setting, the temperature value of detection compares with set temperature value at any time, according to the temperature departure direction aperture of fuel metering and combustion air control valve at any time, thereby reaches temperature auto control.
Kiln body 1 also is provided with even air blast device 9 in the kiln, and air is arranged on the section of kiln uniformly, and material cooling and air preheat are even.Even air blast device 9 is made up of refractory material and metal material in the kiln, and is simple in structure, by center fume extractor 2 waste gas discharged at last.
Lime-roasting shaft furnace of the present invention also is provided with sealed scale hooper 11, and scale hooper is made up of hydrodynamic seal valve and electronic scale.Sealed scale hooper 11 and discharging machine 10 chain quantitative dischargings, load is stable.
Lime-roasting shaft furnace of the present invention is simple in structure, simple to operate, the investment is little, the crude fuel wide adaptability, hear rate is low, product quality is high.
More than structure of the present invention is set forth, but the embodiment that the present invention introduced in this not conditional intention, in the scope that does not deviate from purport of the present invention, the present invention can have multiple variation and modification.
Claims (8)
1. lime-roasting shaft furnace, comprise that internal combustion does not have the material combustion chamber, the fuel-air injector mixer, the fuel air mixture import, the chamber temperature control system, even air-blast device in the kiln, the center fume extractor, wherein fuel and air mixture spray into internal combustion by the injector that is located at the kiln periphery does not have the material combustion chamber, fuel air mixture enters in the kiln by the fuel air mixture inlet, two strands spray into internal combustion in opposite directions and do not have the high temperature and high pressure gas that fuel and the air mixture collision burning of material combustion chamber produces and spray at a high speed from the bottom, combustion chamber, enter equably in the material material is carried out roasting, and control the temperature of combustion chamber by the chamber temperature control system, by even air blast device in the kiln, air is arranged on the section of kiln uniformly, and material cooling and air preheat are even.
2. lime-roasting shaft furnace as claimed in claim 1, wherein said internal combustion do not have the horizontal kiln body section that collapses in material combustion chamber, are shaped as rectangle, and two ends link to each other with injector with the kiln wall.
3. lime-roasting shaft furnace as claimed in claim 1, wherein said each internal combustion does not have the material combustion chamber temperature point is set, the automatic chain adjusting chamber gas temperature of chamber temperature and fuel/air mixture amount is controlled in the needed temperature range of material roasting chamber temperature.
4. lime-roasting shaft furnace as claimed in claim 1 is wherein stated the temperature that the chamber temperature control system is controlled the combustion chamber, if temperature is low excessively, can carry out preheating by salband combustion air preheater in the kiln.
5. lime-roasting shaft furnace as claimed in claim 1, wherein said lime-roasting shaft furnace be a kind of section be circular oval the shaft furnace of square roasting (calcining) lime.
6. as the arbitrary described lime-roasting shaft furnace of claim 1-5, wherein said lime-roasting shaft furnace also comprises sealed scale hooper, and scale hooper is made up of hydrodynamic seal valve and electronic scale, the chain quantitative discharging of sealed scale hooper and discharging machine, and load is stable.
7. as the arbitrary described lime-roasting shaft furnace of claim 1-5, wherein said lime-roasting shaft furnace also comprises the center fume extractor.
8. as the described lime-roasting shaft furnace of claim 1-5, even air blast device is made up of refractory material and metal material in the wherein said kiln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101064026A CN102155846B (en) | 2011-04-27 | 2011-04-27 | Lime roasting shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101064026A CN102155846B (en) | 2011-04-27 | 2011-04-27 | Lime roasting shaft kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102155846A true CN102155846A (en) | 2011-08-17 |
| CN102155846B CN102155846B (en) | 2012-08-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101064026A Expired - Fee Related CN102155846B (en) | 2011-04-27 | 2011-04-27 | Lime roasting shaft kiln |
Country Status (1)
| Country | Link |
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| CN (1) | CN102155846B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113154869A (en) * | 2021-04-08 | 2021-07-23 | 刘发光 | Tabular corundum sintering system |
| CN114700349A (en) * | 2022-04-07 | 2022-07-05 | 广西大学 | Biofuel shaft kiln, red mud magnetization device and red mud magnetization method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315202A (en) * | 1976-07-29 | 1978-02-10 | Nippon Steel Corp | Controlling method for blowing temperature |
| CN2325737Y (en) * | 1998-03-20 | 1999-06-23 | 冯国志 | Internal guiding type vertical lime kiln |
| CN2562152Y (en) * | 2002-04-19 | 2003-07-23 | 潘志成 | Lime kiln |
| CN2567534Y (en) * | 2002-09-06 | 2003-08-20 | 杨义清 | Brick-concrete lime shaft kilm structure |
| JP2010019539A (en) * | 2007-12-10 | 2010-01-28 | Oyamada Chizuru | Air heating furnace, heating device and warming device |
| CN101857383A (en) * | 2010-06-28 | 2010-10-13 | 贾会平 | Beam limekiln |
-
2011
- 2011-04-27 CN CN2011101064026A patent/CN102155846B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5315202A (en) * | 1976-07-29 | 1978-02-10 | Nippon Steel Corp | Controlling method for blowing temperature |
| CN2325737Y (en) * | 1998-03-20 | 1999-06-23 | 冯国志 | Internal guiding type vertical lime kiln |
| CN2562152Y (en) * | 2002-04-19 | 2003-07-23 | 潘志成 | Lime kiln |
| CN2567534Y (en) * | 2002-09-06 | 2003-08-20 | 杨义清 | Brick-concrete lime shaft kilm structure |
| JP2010019539A (en) * | 2007-12-10 | 2010-01-28 | Oyamada Chizuru | Air heating furnace, heating device and warming device |
| CN101857383A (en) * | 2010-06-28 | 2010-10-13 | 贾会平 | Beam limekiln |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113154869A (en) * | 2021-04-08 | 2021-07-23 | 刘发光 | Tabular corundum sintering system |
| CN114700349A (en) * | 2022-04-07 | 2022-07-05 | 广西大学 | Biofuel shaft kiln, red mud magnetization device and red mud magnetization method |
| CN114700349B (en) * | 2022-04-07 | 2023-06-09 | 广西产研院智慧农业研究院有限公司 | Biofuel shaft kiln, red mud magnetizing device and red mud magnetizing method |
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| CN102155846B (en) | 2012-08-08 |
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Granted publication date: 20120808 Termination date: 20210427 |