CN102001837A - Method and device for calcining materials by using low calorific value fuel - Google Patents
Method and device for calcining materials by using low calorific value fuel Download PDFInfo
- Publication number
- CN102001837A CN102001837A CN2010105058439A CN201010505843A CN102001837A CN 102001837 A CN102001837 A CN 102001837A CN 2010105058439 A CN2010105058439 A CN 2010105058439A CN 201010505843 A CN201010505843 A CN 201010505843A CN 102001837 A CN102001837 A CN 102001837A
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- Prior art keywords
- calcining
- preheating
- zone
- low calorie
- calorie fuels
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- 238000001354 calcination Methods 0.000 title claims abstract description 59
- 239000000446 fuel Substances 0.000 title claims abstract description 53
- 239000000463 material Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000004571 lime Substances 0.000 claims abstract description 27
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 26
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims description 19
- 239000002737 fuel gas Substances 0.000 claims description 16
- 238000002485 combustion reaction Methods 0.000 claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 4
- 238000010304 firing Methods 0.000 claims description 4
- 239000003546 flue gas Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000005431 greenhouse gas Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 235000019738 Limestone Nutrition 0.000 description 9
- 239000006028 limestone Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 4
- 239000005997 Calcium carbide Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 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 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000876852 Scorias Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000001149 thermolysis Methods 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
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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- Furnace Details (AREA)
Abstract
The invention provides a method and device for calcining materials by using low calorific value fuel. The device comprises a kiln body, a preheating furnace and a matching system, the kiln body is internally provided with a preheating zone, a calcining zone, a cooling zone and a material discharging port; the calcining zone is provided with a burning beam, and the upper part of the preheating zone and the middle part of the cooling zone are provided with suction beams; the calcined materials are produced into lime products in the calcining device after being subject to preheating, calcining and cooling; and the low calorific value fuel is preheated to 400-800 DEG C by a preheating furnace and then enters to the calcining zone to burn, and hot air after cooling lime serves as supporting air. In the invention, the low calorific value fuel is preheated and then enters to a calcining device to calcine the materials, thereby improving calcining effect, fully utilizing the low calorific value fuel and saving high-quality fuel; and hot air after cooling the lime directly serves as the supporting air, thereby not only enhancing burning temperature and saving fuel but also reducing the discharge of greenhouse gas and being beneficial to environmental protection.
Description
Technical field
The invention belongs to building materials, chemical technology field, relate to the method and apparatus of calcining materials, be specifically related to a kind of method and apparatus of low calorie fuels calcining materials.
Background technology
With the beam-type limekiln calcined limestone is the new technology that lime is produced.Beam-type limekiln has advantages such as energy consumption is low, the lime product quality is good, throughput is strong, turndown ratio is big, is widely used in the lime production of purposes such as metallurgy, chemical industry.Calcining needs fuel to burn at calcining zone, emits heat heating calcined material.The decomposition temperature of Wingdale is about 900 ℃, and calcining temperature is generally 1000～1200 ℃.For reaching calcining temperature, produce qualified lime, need the fuel of certain calorific value.Fuel value is low, and burning does not reach the temperature of requirement, and Wingdale can not decompose; Perhaps temperature is low, and decomposition of limestone is incomplete, causes burning, the ropy problem of lime product of giving birth to.In the smelter steelmaking process, produce a large amount of blast furnace gases, be valuable fuel source, the calorific value of blast furnace gas is 3000～3400KJ, because calorific value is low, can not be used for calcined limestone, and a large amount of low calorie fuelss can not be fully used.Also need purchase high performance fuel and produce lime, cause the wasting of resources, influence economic benefit.
Application number is that 200810231028.0 application for a patent for invention discloses a kind of " closed type calcium carbide furnace tail gas carries out the method for active lime calcination with fuel as rotary kiln ", this patent application is raw material with the calcium carbide stove exhaust, " clean tail gas after will purifying and coke powder or coal dust are sent in the burner of rotary kiln burning system, as the fuel of lime calcining equipment; Wingdale passes through the preheating of kiln tail hot gas in shaft preheater after, and realize predecomposition, enter the firing system of rotary kiln; "." participate in the refrigerative air and enter the rotary kiln burning as a wind, burning through the air participation of preheating has remedied the low deficiency of closed calcium carbide furnace tail gas calorific value ".This patent application uses the cooling air after the preheating to be combustion air, has improved temperature of combustion, but fuel gas has not been carried out preheating, still need add the coal dust or the coke powder of high heating value in the combustion processes.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of method of low calorie fuels calcining materials, directly use low calorie fuels to produce lime, make full use of the low calorie fuels resource, increase economic efficiency.Another object of the present invention provides a kind of device of realizing aforesaid method.
The method of low calorie fuels calcining materials provided by the invention is: calcined material through preheating zone preheating, calcining zone calcining and cooling zone process of cooling, is made lime product in roasting assembly.After low calorie fuels is preheated to 400～800 ℃ through preheating oven, enter the calcining zone burning, the hot gas after the cool lime is made combustion air.
Low calorie fuels is a blast furnace gas, and calcined material is Wingdale or rhombspar, and the calcining of other material also belongs to the scope of protection of the invention.Select low calorie fuels behind interchanger and flue gas heat exchange, enter the preheating oven preheating again, enter the calcining zone burning then.
The device of low calorie fuels calcining materials provided by the invention, comprise kiln body, feeder system, firing system, discharge system, air feed system and Controlling System, comprise preheating zone, calcining zone, cooling zone and discharge port in the kiln body, calcining zone is provided with burning beam, the top of preheating zone is provided with suction bar, and the middle part of cooling zone is provided with down suction bar.Device also is provided with preheating oven, is provided with burner in the preheating oven, and the fuel gas pipeline is connected to burning beam fuel gas inlet through the preheating tube in the preheating oven, and following suction bar outlet is connected to the burning beam gas inlet.
Preheating tube in the preheating oven is straight tube or coil pipe, does not get rid of the preheating tube of other structure formation.Select the fuel gas pipeline to be connected to preheating oven, be connected to burning beam fuel gas inlet through preheating oven again through interchanger.Burner is geseous fuel burner, liquid fuel burner or solid fuel burner, or the combination of above-mentioned burner.The kiln wall of calcining zone is provided with peripheral burner.
Low calorie fuels gas is preheating to 400～800 ℃ through preheating oven, through cool lime process liberated heat warm-up combustion-supporting air, make combustion air temperature reach 300～400 ℃, fuel gas and combustion air after the preheating burn at calcining zone, can produce 1200～1400 ℃ high temperature, calcined limestone is produced the fat lime product.Compared with prior art, the present invention improves the calcining temperature of roasting assembly by low calorie fuels is carried out preheating, has improved the calcining effect, and low calorie fuels is fully used, and has saved high-grade fuel, has improved the quality of calcination product.Hot gas after the cool lime directly as combustion air, both can improve temperature of combustion, fuel saving, reduced greenhouse gas emission again, helped environment protection.Low calorie fuels calcining materials device flow process of the present invention is simple, easy to implement, can be used for calcined limestone, rhombspar, produces lime, also can be used for other high-temperature combustion equipment.
Description of drawings
Fig. 1 is a low calorie fuels calcining materials device schematic flow sheet of the present invention;
Fig. 2 is another embodiment of the present invention schematic flow sheet.
Wherein:
Suction bar, 7-cooling zone, 8-cooling air inlet, 9-discharge port, 10-fly-ash separator, 11-induced draft fan, 12-chimney, 13-preheating oven, 14-cooling blower, 15-interchanger, 16-kiln body, 17-preheating tube, 18-fuel gas pipeline, 19-recirculation blower under 1-apparatus for feeding, the last suction bar of 2-, 3-preheating zone, 4-burning beam, 5-calcining zone, the 6-.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
The device of low calorie fuels calcining materials of the present invention comprises kiln body 16, feeder system, firing system, discharge system, air feed system and Controlling System as shown in Figure 1.Comprise preheating zone 3, calcining zone 5, cooling zone 7 and discharge port 9 in the kiln body, calcining zone is provided with upper and lower two-layer burning beam 4 and peripheral burner, 3 burning beams in upper strata, 2 burning beams of lower floor.The top of preheating zone is provided with two and goes up suction bar 2, and the middle part of cooling zone is provided with 2 following suction bars 6.The external preheating oven 13 that is provided with of kiln is equipped with preheating tube 17 in the preheating oven, preheating tube is a coil pipe, and fuel gas pipeline 18 is connected to the fuel gas inlet of burning beam through coil pipe.The outlet of following suction bar 6 is connected to the burning beam gas inlet through recirculation blower 19, makes combustion air with the high-temperature gas of cool lime.Be provided with the geseous fuel burner in the preheating oven.Kiln body top material inlet is connected with apparatus for feeding 1, and the bottom discharge port is connected with discharging equipment.Last suction bar 2 is connected to chimney through fly-ash separator 10, induced draft fan 11.Cooling blower 14 is connected to the cooling air inlet 8 of kiln body bottom.
Present embodiment is a raw material with the Wingdale, and the steel-making blast furnace coal gas that with the calorific value is 3200KJ is fuel, production metallurgy lime.Blast furnace gas is in preheating oven 13 preheatings, and preheating oven is fuel with the blast furnace gas, by fuel gas to 600～650 in the 17 next door heating tubes of the preheating tube in the preheating oven ℃, to the calcining zone burning.Calcination process is: limestone material enters kiln body 16 through apparatus for feeding 1,3 high-temperature flue gas by rising carry out preheating to Wingdale in the preheating zone, Wingdale moves to calcining zone 5 after the preheating, fuel and combustion air by the ejection of upper and lower layer burning beam 4 burners burn, produce 1120～1250 ℃ high temperature section scoria lime stone, the Wingdale thermolysis generates lime and CO
2Lime product operation downwards enters cooling zone 7, and the cooling air that is entered by bottom cooling air inlet 8 from bottom to top cools off lime, and cooled lime product goes out device through discharge port 9.After the cooling zone cool lime, air themperature reaches 300～400 ℃, and under recirculation blower 19 suction functions, warp suction bar 6, recirculation blower is down made combustion air to burning beam.The upwards operation of flue gas that calcining zone burns and produces after the preheating limestone material, is extracted the kiln bodies out by last suction bar 2, arrives smoke stack emission through fly-ash separator 10, induced draft fan 11.
Another embodiment of the present invention as shown in Figure 2, described fuel gas pipeline 18 is connected to preheating oven 13 through interchanger 15, the preheating tube in preheating oven 17 is connected to burning beam fuel gas inlet again.Low calorie fuels gas earlier through smoke pre-heating to 100～200 ℃, is preheated to 650～700 through preheating oven again, enters the calcining zone calcined limestone then.Make full use of fume afterheat, further cut down the consumption of energy, reduce the calcining cost.Other structure of present embodiment is identical with embodiment 1 with operation.
Claims (9)
1. the method for a low calorie fuels calcining materials, calcined material is calcined and cooling zone (7) process of cooling through preheating zone (3) preheating, calcining zone (5) in roasting assembly, make lime product, it is characterized in that: described low calorie fuels enters the calcining zone burning after being preheated to 400～800 ℃ through preheating oven (13), and the hot gas after the cool lime is made combustion air.
2. according to the method for the described low calorie fuels calcining materials of claim 1, it is characterized in that: described low calorie fuels is a blast furnace gas.
3. according to the method for the described low calorie fuels calcining materials of claim 1, it is characterized in that: described calcined material is Wingdale or rhombspar.
4. according to the method for each described low calorie fuels calcining materials of claim 1～3, it is characterized in that: described low calorie fuels enters the preheating oven preheating behind interchanger (15) and flue gas heat exchange.
5. the device of a low calorie fuels calcining materials, comprise kiln body (16), feeder system, firing system, discharge system, air feed system and Controlling System, comprise preheating zone (3) in the kiln body, calcining zone (5), cooling zone (7) and discharge port (9), described calcining zone is provided with burning beam (4), the top of preheating zone is provided with suction bar (2), the middle part of cooling zone is provided with down suction bar (6), it is characterized in that: described device also is provided with preheating oven (13), be provided with burner in the preheating oven, fuel gas pipeline (18) is connected to burning beam fuel gas inlet through the preheating tube (17) in the preheating oven, and following suction bar outlet is connected to the burning beam gas inlet.
6. according to the device of the described low calorie fuels calcining materials of claim 5, it is characterized in that: the preheating tube in the described preheating oven is straight tube or coil pipe.
7. according to the device of the described low calorie fuels calcining materials of claim 5, it is characterized in that: described fuel gas pipeline is connected to preheating oven (13) through interchanger (15), is connected to burning beam fuel gas inlet through preheating oven again.
8. according to the device of the described low calorie fuels calcining materials of claim 5, it is characterized in that: the kiln wall of described calcining zone is provided with peripheral burner.
9. according to the device of the described low calorie fuels calcining materials of claim 5, it is characterized in that: described burner is geseous fuel burner, liquid fuel burner or solid combustion burner, or the combination of above-mentioned burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105058439A CN102001837A (en) | 2010-10-14 | 2010-10-14 | Method and device for calcining materials by using low calorific value fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105058439A CN102001837A (en) | 2010-10-14 | 2010-10-14 | Method and device for calcining materials by using low calorific value fuel |
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| CN102001837A true CN102001837A (en) | 2011-04-06 |
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| CN2010105058439A Pending CN102001837A (en) | 2010-10-14 | 2010-10-14 | Method and device for calcining materials by using low calorific value fuel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219402A (en) * | 2011-04-14 | 2011-10-19 | 石家庄市新华工业炉有限公司 | Method and device for calcining materials |
| CN108314336A (en) * | 2018-05-09 | 2018-07-24 | 王长春 | A kind of lime kiln device using circulating air |
| CN109654874A (en) * | 2018-12-05 | 2019-04-19 | 东北大学 | A kind of vertical activation calciner of novel aluminium oxide and method of roasting |
| CN110526595A (en) * | 2018-05-23 | 2019-12-03 | 绵竹市拱星氧化钙厂 | Efficient calcining prepares the mixing formula limekiln of lime |
| CN110745798A (en) * | 2019-10-17 | 2020-02-04 | 昆明理工大学 | Method and device for removing carbon dioxide in phosphate ore by calcining CO-containing industrial tail gas |
| CN111807726A (en) * | 2020-06-23 | 2020-10-23 | 湖北湖大天沭新能源材料工业研究设计院有限公司 | Sectional vertical type high-activity calcium oxide cooling device and method |
| CN112325312A (en) * | 2020-10-21 | 2021-02-05 | 昆明理工大学 | Method and device for reducing emission of acidic harmful gas in CO industrial tail gas by pyrolysis of carbonate ore |
| CN114772953A (en) * | 2022-04-29 | 2022-07-22 | 首钢集团有限公司 | Rotary kiln calcining system and method |
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| CN1181360A (en) * | 1996-11-02 | 1998-05-13 | 贝肯巴克热工研究股份有限公司 | Method for preheating power gas for vertical kiln production |
| CN101186451A (en) * | 2007-11-16 | 2008-05-28 | 重庆钢铁(集团)有限责任公司 | Method for calcining metallurgy lime by using lower calorific value converter coal gas |
| CN101857383A (en) * | 2010-06-28 | 2010-10-13 | 贾会平 | Beam limekiln |
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2010
- 2010-10-14 CN CN2010105058439A patent/CN102001837A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1181360A (en) * | 1996-11-02 | 1998-05-13 | 贝肯巴克热工研究股份有限公司 | Method for preheating power gas for vertical kiln production |
| CN101186451A (en) * | 2007-11-16 | 2008-05-28 | 重庆钢铁(集团)有限责任公司 | Method for calcining metallurgy lime by using lower calorific value converter coal gas |
| CN101857383A (en) * | 2010-06-28 | 2010-10-13 | 贾会平 | Beam limekiln |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219402A (en) * | 2011-04-14 | 2011-10-19 | 石家庄市新华工业炉有限公司 | Method and device for calcining materials |
| CN102219402B (en) * | 2011-04-14 | 2012-10-10 | 石家庄市新华工业炉有限公司 | Method and device for calcining materials |
| CN108314336A (en) * | 2018-05-09 | 2018-07-24 | 王长春 | A kind of lime kiln device using circulating air |
| CN110526595A (en) * | 2018-05-23 | 2019-12-03 | 绵竹市拱星氧化钙厂 | Efficient calcining prepares the mixing formula limekiln of lime |
| CN109654874A (en) * | 2018-12-05 | 2019-04-19 | 东北大学 | A kind of vertical activation calciner of novel aluminium oxide and method of roasting |
| CN110745798A (en) * | 2019-10-17 | 2020-02-04 | 昆明理工大学 | Method and device for removing carbon dioxide in phosphate ore by calcining CO-containing industrial tail gas |
| CN111807726A (en) * | 2020-06-23 | 2020-10-23 | 湖北湖大天沭新能源材料工业研究设计院有限公司 | Sectional vertical type high-activity calcium oxide cooling device and method |
| CN111807726B (en) * | 2020-06-23 | 2022-04-29 | 湖北湖大天沭新能源材料工业研究设计院有限公司 | Sectional vertical type high-activity calcium oxide cooling device and method |
| CN112325312A (en) * | 2020-10-21 | 2021-02-05 | 昆明理工大学 | Method and device for reducing emission of acidic harmful gas in CO industrial tail gas by pyrolysis of carbonate ore |
| CN114772953A (en) * | 2022-04-29 | 2022-07-22 | 首钢集团有限公司 | Rotary kiln calcining system and method |
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Application publication date: 20110406 |