CN104119006A - Lime shaft kiln with internally-installed combustion chambers - Google Patents
Lime shaft kiln with internally-installed combustion chambers Download PDFInfo
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- CN104119006A CN104119006A CN201410316012.5A CN201410316012A CN104119006A CN 104119006 A CN104119006 A CN 104119006A CN 201410316012 A CN201410316012 A CN 201410316012A CN 104119006 A CN104119006 A CN 104119006A
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- carbon dioxide
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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 relates to a lime shaft kiln with internally-installed combustion chambers. The lime shaft kiln comprises waste heat boilers, a carbon dioxide processing unit, a power generation device, a material supply device, an air supply system and a fuel supply system. A preheating zone of a kiln body is provided with an upper suction beam, and the upper part of a cooling zone is provided with a lower suction beam. A calcining zone is provided with the combustion chambers, one end of each combustion chamber is provided with a combustor, and the other end of each combustion chamber is communicated with the waste heat boiler. Each combustor is provided with a coal powder inlet, a primary air inlet and a secondary air inlet, the primary air inlets are connected with an air blower or/and an oxygen pipeline. An outlet of the upper suction beam is connected to the carbon dioxide processing unit through a draught fan, an outlet of the lower suction beam is connected to the secondary air inlets or an inlet of the draught fan, an inlet of a cooling fan is connected with the carbon dioxide processing unit or is communicated with the atmosphere. A material in the kiln body is heated by heat conduction brick masonry in a flame isolation mode, the quality of a calcined product is improved, high-purity carbon dioxide is recycled, waste heat is used for power generation, heat energy resources are fully utilized, and comprehensive economic benefits of the lime kiln are improved.
Description
Technical field
The invention belongs to industrial furnace technical field, relate to the lime shaft kiln of a kind of built-in combustion chamber.
Background technology
Lime kiln afterheat is recycled, can save energy consumption, reduce lime production cost, and reduce the discharge of pollutent simultaneously.Limestone kiln is large-scale highly energy-consuming device, and along with the fast development of national economy, the waste heat of industrial furnace is very abundant, available having a high potential.The industry of Iron And Steel Industry, calcium carbide, aluminum oxide industry and refractory industry are lime consumption rich anies influential family, and the rapid growth of above-mentioned industry has driven the high speed development in limestone kiln.In process of production, smog discharge temperature is high for large-scale active lime production line, is about 240～260 ℃.This part fume afterheat is effectively utilized, can reduce energy dissipation, increase economy and the feature of environmental protection in limestone kiln.The carbonic acid gas that decomposition of limestone produces is precious resources, because the carbonic acid gas and the combustion product gases that decompose mix, is unfavorable for recovery and the utilization of carbonic acid gas.
Openly " equipment that a kind of low temperature heat of lime kiln is recycled, mainly comprises limestone kiln, working medium storage tank, working medium preheater, vapour generator, steam setting device, steam turbine, generator, transmitter and condenser in the application for a patent for invention that the applicant is CN102338565A at publication number.By working medium preheater, use the cryogenic gas in limestone kiln by working medium preheating, by vapour generator, use thermal oil liberated heat that the working medium after preheating is converted into steam, recycling steam turbine drives generator generating, the electricity producing can be supplied with lime kiln device consumer and use, and also can be incorporated to the total net of electric power ".The present invention is the improvement in above-mentioned patented technology.
Summary of the invention
The lime shaft kiln that the object of this invention is to provide a kind of built-in combustion chamber, adopt the outer hot mode calcined limestone of external combustion, combustion chamber and decomposition of limestone chamber are separated, the cogeneration that is beneficial to collect highly purified carbonic acid gas and utilizes combustion product gases, reduce the energy expenditure in limestone kiln, improve limestone kiln overall economic efficiency.
The lime shaft kiln of built-in combustion of the present invention chamber, comprises waste heat boiler, carbon dioxide treatment unit, power generation assembly, kiln body, induced draft fan, cooling blower, feeder apparatus, air feed system and fuel feed system.Kiln body is provided with opening for feed, discharge port and cooling air inlet, and cooling blower is connected to cooling air inlet.In kiln body, be divided into preheating zone, calcining zone and cooling zone, preheating zone is provided with suction bar, and cooling zone is provided with lower suction bar.Calcining zone is provided with combustion chamber, and the quantity of combustion chamber is according to the make out the scale of lime shaft kiln.One of combustion chamber is provided with burner, and other end is communicated with waste heat boiler.Burner is provided with coal powder entrance, wind entrance and secondary air entrance, wind entrance with gas blower or/and oxygen pipeline be connected.Waste heat boiler is provided with steam coils, and steam coils is connected to power generation assembly, and the bottom of waste heat boiler is provided with molten slag bath, and molten slag bath is provided with slag notch.The outlet of upper suction bar is connected with carbon dioxide treatment unit by induced draft fan, and the outlet of lower suction bar is connected to secondary air entrance or induced draft fan entrance, and cooling blower entrance is connected with carbon dioxide treatment unit or is communicated with atmosphere.
Carbon dioxide treatment unit comprises purifying carbon dioxide equipment, carbonic acid gas cooling apparatus and carbon dioxide storage tank, and connects successively.A wind entrance is that tangential way is connected with burner.Waste heat boiler is provided with venting port, and venting port is connected with exhaust emission system or carbon dioxide treatment unit.The top of combustion chamber is provided with cone, and the wall of combustion chamber and cone are built by laying bricks or stones and formed or metallic substance is made by heat conduction brick structures, and affiliated metallic substance comprises cast iron, cast steel or high temperature steel.Power generation assembly comprises steam turbine and generating set, and steam coils is connected with steam turbine, and steam turbine is connected with generating set.
The combustion-supporting gas of combustion chambers burn is air, oxygen-rich air or oxygen, if oxygen is made combustion-supporting gas firing, the flue gas producing after burning arrives carbon dioxide treatment unit through venting port.If air, oxygen-rich air are made combustion-supporting gas firing, the flue gas producing after burning arrives exhaust emission system through venting port.The cooling air of cool lime is selected air or carbonic acid gas, if make cooling air with air, cooled high temperature air enters combustion chamber through lower suction bar and secondary air entrance and makes secondary combustion-supporting wind.If make cooling gas with carbonic acid gas, cooled gas arrives the recycle of carbon dioxide treatment unit through lower suction bar and induced draft fan.
Shaft furnace is for the production of the dry-distillation incineration of lime, coal carbonization and coking, rubbish, the calcining of pelletizing or reduction iron production, the blue charcoal of coal carbonization production high-quality and can be used as the blue charcoal tail gas of high-quality of the raw material of LNG.
The lime shaft kiln of built-in combustion of the present invention chamber adds the material in heating kiln body by heat conduction brick structures muffle, is conducive to improve the quality of calcination product, reclaims high-pureness carbon dioxide.The flue gas of combustion chamber enters waste heat boiler, and steam driven electric power generation occurs, and improves thermo-efficiency, makes full use of heat resource.High-temperature gas after cooling zone cool lime product enters combustion chamber and makes secondary combustion-supporting wind, is conducive to improve the temperature of combustion air, reduces the energy expenditure in limestone kiln.Adopt the outer hot mode calcined limestone of external combustion, combustion chamber and decomposition of limestone chamber are separated, be beneficial to collect respectively high-pureness carbon dioxide and high-temperature waste flue gas cogeneration, not only reduce the energy consumption in limestone kiln, and can obtain this valuable industrial chemicals of high-purity carbon dioxide, improve limestone kiln overall economic efficiency.With pure oxygen, do the carbonic acid gas producing after combustion-supporting gas burning and reclaim carbonic acid gas by carbon dioxide treatment unit, with carbonic acid gas, do the medium circulation utilization of cool lime, be conducive to reduce exhaust gas emission, environment protection.
Accompanying drawing explanation
Fig. 1 is the structural representation of the lime shaft kiln of built-in combustion of the present invention chamber;
Fig. 2 is that the A of Fig. 1 is to figure;
Fig. 3 is the structural representation of another program of the present invention;
Fig. 4 is that the B of Fig. 3 is to figure.
Wherein:
1-opening for feed, 2-upper suction bar, 3-kiln body, 4-cone, 5-combustion chamber, 6-burner, 7-lower suction bar, 8-cooling air inlet, 9-discharge port, 10-induced draft fan, 11-preheating zone, 12-calcining zone, 13-cooling zone, 14-cooling blower, 15-purifying carbon dioxide equipment, 16-carbonic acid gas cooling apparatus, 17-carbon dioxide storage tank, 18-wind entrance, 19-coal powder entrance, 20-secondary air entrance, 21-slag notch, 22-molten slag bath, 23-steam coils, 24-waste heat boiler, 25-carbonic acid gas induced draft fan.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
Embodiment 1
The lime shaft kiln of built-in combustion of the present invention chamber, as shown in Figure 1 and Figure 2, comprise waste heat boiler 24, carbon dioxide treatment unit, power generation assembly, kiln body 3, induced draft fan 10, cooling blower 14, feeder apparatus, air feed system and fuel feed system, kiln body is provided with opening for feed 1, discharge port 9 and cooling air inlet 8, and cooling blower is connected to cooling air inlet.In kiln body, be divided into preheating zone 11, calcining zone 12 and cooling zone 13, preheating zone is provided with suction bar 2, and the top of cooling zone is provided with lower suction bar 7.Power generation assembly comprises steam turbine and generating set, and steam turbine is coaxially connected with generating set.Carbon dioxide treatment unit comprises purifying carbon dioxide equipment 15, carbonic acid gas cooling apparatus 16 and carbon dioxide storage tank 17, and purifying carbon dioxide equipment, carbonic acid gas cooling apparatus are connected successively with carbon dioxide storage tank.Calcining zone is provided with 1～5 combustion chamber 5, and one of combustion chamber is provided with burner 6, and other end is communicated with waste heat boiler.The top of combustion chamber 5 is provided with cone 4, and the wall of combustion chamber and cone are built by laying bricks or stones and formed by heat conduction brick structures.Burner is provided with coal powder entrance 19, wind entrance 18 and 20, wind entrances of secondary air entrance and is connected with oxygen pipeline, with pure oxygen, does wind one time.A wind entrance is that tangential way is connected with burner, and now secondary air entrance is closed state.Waste heat boiler is provided with steam coils 23 and venting port, and steam coils is connected to steam turbine, and the bottom of waste heat boiler is provided with molten slag bath, and molten slag bath is provided with slag notch.The outlet of upper suction bar is connected with carbon dioxide treatment unit by induced draft fan 10, and the outlet of lower suction bar is connected to induced draft fan entrance.Cooling blower entrance is connected with the carbon dioxide storage tank 17 of carbon dioxide treatment unit, with carbonic acid gas, makes cooling air.The venting port of waste heat boiler is connected with carbon dioxide treatment unit.
The operation scheme of the lime shaft kiln of built-in combustion of the present invention chamber is that limestone material, in feeder apparatus, opening for feed 1 enter the kiln body of shaft furnace, through preheating zone 11 preheatings, goes downwards to calcining zone 12.The material of the heat muffle heating and calcining band being produced by combustion chamber 5 burnings, Wingdale thermolysis is lime and carbonic acid gas, the material that carbonic acid gas upwards moves preheating preheating zone arrives carbon dioxide treatment unit by upper suction bar 2 and induced draft fan 10.High temperature lime runs down to cooling zone 13, and the cooling air being bloated by cooling blower 14 enters cooling zone through cooling air inlet 8 and lime carried out cooling, and cooled lime is through discharge port 9 kiln discharges.Coal dust enters burner 6 through coal powder entrance 19, and the pure oxygen of oxygen pipeline enters burner 6 as a wind through a wind entrance and carries out combustion-supporting burning.Carbonic acid gas after cool lime enters carbon dioxide treatment unit through lower suction bar 7 and induced draft fan, and the venting port of waste heat boiler is also connected to carbon dioxide treatment unit.The slag of the molten state that combustion chambers burn produces enters molten slag bath 22, emits heat and discharges by slag notch 21.The useless flue gas that burning produces enters waste heat boiler 24, by steam coils 23 heat-obtainings, utilizes the waste heat generation steam of flue gas, and steam driven steam turbine drives generator generating.Because the heating of Wingdale muffle is calcined, decomposition of limestone obtains fat lime and high temperature carbon dioxide decomposition gas, decomposition gas enters carbon dioxide treatment unit, after purifying carbon dioxide equipment 15 purifying and dedustings, carbonic acid gas cooling apparatus 16 are cooling, to carbon dioxide storage tank 17, store, a part of carbonic acid gas circulates as the medium of cool lime.
Embodiment 2
As shown in Figure 3, Figure 4, one time wind entrance 18 is connected with gas blower another embodiment of the present invention, with air, makes combustion air.Cooling blower 14 entrances are communicated with atmosphere, with air, make lime cooling air.Upper suction bar 2 outlets are connected with carbon dioxide treatment unit by induced draft fan 10, and the venting port of waste heat boiler is connected to exhaust emission system.The carbonic acid gas that the carbonic acid gas that decomposition of limestone produces and pure oxygen and fuel combustion produce together enters carbon dioxide treatment unit.The outlet of lower suction bar 7 is connected to secondary air entrance 20 by carbonic acid gas induced draft fan 25, makes the secondary combustion-supporting wind of combustion chambers burn with the high temperature air after cool lime.Other structure and operation are identical with embodiment 1.
Claims (6)
1. the lime shaft kiln of a built-in combustion chamber, comprise waste heat boiler (24), carbon dioxide treatment unit, power generation assembly, kiln body (3), induced draft fan (10), cooling blower (14), feeder apparatus, air feed system and fuel feed system, kiln body is provided with opening for feed (1), discharge port (9) and cooling air inlet (8), and cooling blower is connected to cooling air inlet; In kiln body, be divided into preheating zone (11), calcining zone (12) and cooling zone (13), preheating zone is provided with suction bar (2), and cooling zone is provided with lower suction bar (7); It is characterized in that: described calcining zone is provided with combustion chamber (5), one of combustion chamber is provided with burner (6), and other end is communicated with waste heat boiler; Described burner is provided with coal powder entrance (19), a wind entrance (18) and secondary air entrance (20), a described wind entrance with gas blower or/and oxygen pipeline be connected; Described waste heat boiler is provided with steam coils (23), and steam coils is connected to power generation assembly, and the bottom of waste heat boiler is provided with molten slag bath (22), and molten slag bath is provided with slag notch (21); The outlet of described upper suction bar is connected with carbon dioxide treatment unit by induced draft fan (10), and the outlet of described lower suction bar is connected to secondary air entrance or induced draft fan entrance, and described cooling blower entrance is connected with carbon dioxide treatment unit or is communicated with atmosphere.
2. the lime shaft kiln of built-in combustion according to claim 1 chamber, is characterized in that: described carbon dioxide treatment unit comprises purifying carbon dioxide equipment (15), carbonic acid gas cooling apparatus (16) and carbon dioxide storage tank (17), and connects successively.
3. the lime shaft kiln of built-in combustion according to claim 1 chamber, is characterized in that: a described wind entrance (18) is connected with burner (6) for tangential way.
4. the lime shaft kiln of built-in combustion according to claim 1 chamber, is characterized in that: described waste heat boiler (24) is provided with venting port, and described venting port is connected with exhaust emission system or carbon dioxide treatment unit.
5. the lime shaft kiln of built-in combustion according to claim 1 chamber, it is characterized in that: the top of described combustion chamber (5) is provided with cone (4), the wall of combustion chamber and cone are built by laying bricks or stones and are formed or metallic substance is made by heat conduction brick structures, and described metallic substance comprises cast iron, cast steel or high temperature steel.
6. the lime shaft kiln of built-in combustion according to claim 1 chamber, is characterized in that: described power generation assembly comprises steam turbine and generating set, and steam coils (23) is connected with steam turbine, and steam turbine is connected with generating set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316012.5A CN104119006B (en) | 2014-07-04 | 2014-07-04 | A kind of lime shaft kiln of built-in combustion room |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410316012.5A CN104119006B (en) | 2014-07-04 | 2014-07-04 | A kind of lime shaft kiln of built-in combustion room |
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| Publication Number | Publication Date |
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| CN104119006A true CN104119006A (en) | 2014-10-29 |
| CN104119006B CN104119006B (en) | 2016-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410316012.5A Active CN104119006B (en) | 2014-07-04 | 2014-07-04 | A kind of lime shaft kiln of built-in combustion room |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891831A (en) * | 2015-06-28 | 2015-09-09 | 刘树钢 | Energy-saving environment-friendly active lime roasting shaft kiln |
| CN108675656A (en) * | 2018-07-06 | 2018-10-19 | 唐山市丰南区金泉冶金能源新技术开发有限公司 | A kind of electric burning lime kiln using recycling carbon dioxide power generation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323505A (en) * | 2007-06-11 | 2008-12-17 | 余经炎 | Direct combustion type lime carbonate calcination method |
| DE102009014026A1 (en) * | 2008-12-03 | 2010-06-10 | Ernest Stangl | Method for generating thermal energy as e.g. electrical energy, in distributed power plant, involves burning fuel in container in heat- or power plant using oxygen source, and supplying carbon dioxide and oxygen mixture for burning fuel |
| CN102338565A (en) * | 2011-07-22 | 2012-02-01 | 石家庄市新华工业炉有限公司 | Equipment for recycling low-temperature heat of lime kiln |
| CN102951859A (en) * | 2012-10-24 | 2013-03-06 | 石家庄新华能源环保科技股份有限公司 | Heat accumulating type lime kiln |
| CN204022688U (en) * | 2014-07-04 | 2014-12-17 | 石家庄新华能源环保科技股份有限公司 | The lime shaft kiln of a kind of built-in combustion chamber |
-
2014
- 2014-07-04 CN CN201410316012.5A patent/CN104119006B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323505A (en) * | 2007-06-11 | 2008-12-17 | 余经炎 | Direct combustion type lime carbonate calcination method |
| DE102009014026A1 (en) * | 2008-12-03 | 2010-06-10 | Ernest Stangl | Method for generating thermal energy as e.g. electrical energy, in distributed power plant, involves burning fuel in container in heat- or power plant using oxygen source, and supplying carbon dioxide and oxygen mixture for burning fuel |
| CN102338565A (en) * | 2011-07-22 | 2012-02-01 | 石家庄市新华工业炉有限公司 | Equipment for recycling low-temperature heat of lime kiln |
| CN102951859A (en) * | 2012-10-24 | 2013-03-06 | 石家庄新华能源环保科技股份有限公司 | Heat accumulating type lime kiln |
| CN204022688U (en) * | 2014-07-04 | 2014-12-17 | 石家庄新华能源环保科技股份有限公司 | The lime shaft kiln of a kind of built-in combustion chamber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891831A (en) * | 2015-06-28 | 2015-09-09 | 刘树钢 | Energy-saving environment-friendly active lime roasting shaft kiln |
| CN108675656A (en) * | 2018-07-06 | 2018-10-19 | 唐山市丰南区金泉冶金能源新技术开发有限公司 | A kind of electric burning lime kiln using recycling carbon dioxide power generation |
| CN108675656B (en) * | 2018-07-06 | 2023-05-23 | 唐山市丰南区金泉冶金能源新技术开发有限公司 | Electric lime kiln for generating power by utilizing recovered carbon dioxide |
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| Publication number | Publication date |
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| CN104119006B (en) | 2016-04-06 |
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