CN102951859B - Heat accumulating type lime kiln - Google Patents
Heat accumulating type lime kiln Download PDFInfo
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- CN102951859B CN102951859B CN201210409027.7A CN201210409027A CN102951859B CN 102951859 B CN102951859 B CN 102951859B CN 201210409027 A CN201210409027 A CN 201210409027A CN 102951859 B CN102951859 B CN 102951859B
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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 heat accumulating type lime kiln which comprises a kiln body, an air blower, a cooling fan, a charging system, a discharging system and an exhaust emission system, wherein the kiln body is provided with a charging hole and a discharging hole and is internally provided with a calcining belt and a cooling belt; the kiln body is of a sleeve structure, a beam structure and an arch bridge structure; the lime kiln is provided with a first preheating chamber and a second preheating chamber which are arranged on the ground or the upper part of the kiln body; the two preheating chambers are used for alternately accumulating heat and preheating combustion air, and when one preheating chamber is used for exhausting smoke and accumulating heat, and the other preheating chamber is used for preheating air. According to the invention, the kiln body is combined with the two independently installed preheating chambers, calcined materials in the preheating chambers are used as heat accumulating bodies, the two preheating chambers are used for alternately accumulating heat and preheating combustion air, high-temperature smoke generated in a calcining process is used for accumulating heat in the preheating chambers, the materials accumulating the heat discharge heat for preheating the combustion air, wasteheat of the smoke is fully utilized so that waste heat is favorably fully used, and energy consumption and production cost of lime are reduced.
Description
Technical field
The invention belongs to building materials, metallurgy, chemical production equipment technical field, relate to a kind of heat accumulating type limestone kiln.
Background technology
Telescopic shaft furnace has another name called ring kiln, originates from German Beckenbach Weir Man Si Teller company, and existing more than 300 cover for seat cartridge type shaft furnaces come into operation in the world.Practice shows, telescopic shaft furnace equipment is simple, and Operation and maintenance are convenient, and Working environment is better, and calcination product is superior in quality, is a kind of very promising Novel furnace.But telescopic shaft furnace complex structure, build and operation easier large, and exist interchanger easily to stop up, the problem such as UTILIZATION OF VESIDUAL HEAT IN is insufficient, restricts sleeve kiln in a large amount of uses of China.Same beam-type limekiln and arch bridge kiln also exist UTILIZATION OF VESIDUAL HEAT IN insufficient, the problem that energy consumption is high.
Granted publication number is that the Chinese patent of CN2937979Y discloses a kind of " annular lime kiln of calcining fuel gas with low heat value ".The fuel that this patent is used is low calorie fuels gas, but the problem of unresolved above-mentioned prior art.
Summary of the invention
The object of this invention is to provide a kind of heat accumulating type limestone kiln, utilize by calcining raw materials accumulation of heat, warm-up combustion-supporting air, makes full use of the waste heat of flue gas, reduces energy expenditure, cuts down finished cost, and increases economic efficiency.
Heat accumulating type of the present invention limestone kiln, comprises kiln body, gas blower, cooling blower, feed system, discharge system and exhaust emission system.Kiln body is provided with opening for feed, discharge port, is provided with calcining zone and cooling zone in kiln body.Calcining zone is provided with combustion equipment, and combustion equipment is provided with fuel oil atomizer and air nozzle, and fuel oil atomizer is connected with fuel conduit; The top of calcining zone is provided with suction bar or exhanst gas outlet, and suction bar is provided with the cavity of heat-eliminating medium circulation, and cooling blower is connected to cooling zone.Limestone kiln is provided with the first preheating chamber and the second preheating chamber, and the first preheating chamber and the second preheating chamber are arranged on the top of ground or kiln body.It is suitable for reading that the first preheating chamber and the second preheating chamber are respectively equipped with preheating chamber opening for feed, preheating chamber discharge port, gas end opening and gas.Preheating chamber discharge port is connected with opening for feed by material transfer equipment.The gas end opening of the first preheating chamber is connected with the air nozzle of suction bar and combustion equipment respectively by No. 4 T-valve, and the gas end opening of the second preheating chamber is connected with the air nozzle of suction bar and combustion equipment respectively by No. 3 T-valve.The gas of the first preheating chamber is suitable for reading to be passed through No. 1 T-valve and is connected with blowdown system with gas blower respectively, and the gas of the second preheating chamber is suitable for reading to be passed through No. 2 T-valve and be connected with blowdown system with gas blower respectively.
The kiln body that selection scheme one is tube-in-tube structure, combustion equipment is combustion chamber.The calcining zone of tube-in-tube structure kiln body is provided with inner core, injector, 3～8 upper combustion chamber and 3～8 lower combustion chamber, same layer combustion chamber is evenly arranged, upper and lower layer combustion chamber staggered arrangement, between each combustion chamber and inner core, by firebridge, be connected, firebridge is the arch form structure that laying fireproof bricks forms.Cooling zone is provided with shunting body, and sleeve is provided with interlayer, and the bottom of interlayer is connected with blower fan, the interlayer injection air port that is connected to injector suitable for reading, injector by injection air port, be connected to the top of inner core.
Selection scheme two is girder structure kiln body, and combustion equipment is burning beam.The calcining zone of girder structure kiln body is provided with two-layer burning beam, every layer of 2～5 burning beam.Lower suction bar is selected to be provided with in the middle part of cooling zone, and burning beam and lower suction bar are provided with the cavity of heat-eliminating medium circulation.
Selection scheme three is arch bridge structure kiln body, and combustion equipment is combustion chamber.The calcining zone of arch bridge structure kiln body is provided with two-layer arch bridge, and every layer is provided with 2～5 arch bridges, and combustion chamber is positioned at the both sides of arch bridge.
Material transfer equipment is pipe chain transfer roller, chapelet or worm conveyor.
The mode of operation in heat accumulating type of the present invention limestone kiln is: two preheating chambers hocket accumulation of heat and warm-up combustion-supporting air, and when a preheating chamber is discharged fume accumulation of heat, another preheating chamber preheated air.The air being produced by gas blower enters the preheating chamber of warm through T-valve, the material in preheating chamber is emitted heat preheated air, and the high temperature air after preheating is sent into combustion equipment as combustion air.High-temperature flue gas enters heat-accumulating process preheating chamber through T-valve carries out accumulation of heat to limestone material, and exothermic flue gas discharges to blowdown system through T-valve.
The preheating chamber that install with two platform independent by kiln body in heat accumulating type of the present invention limestone kiln is combined, utilize the calcined material of preheating chamber to make heat storage, two preheating chambers hocket accumulation of heat and warm-up combustion-supporting air, the high-temperature flue gas that calcination process produces utilizes calcined material to carry out accumulation of heat as heat storage, material after accumulation of heat is emitted heat warm-up combustion-supporting air, make full use of the waste heat of flue gas, be conducive to making full use of of used heat, reduce energy expenditure and lime production cost.The kiln body in heat accumulating type limestone kiln (comprising calcining zone, cooling zone) and preheating chamber split are conducive to reduce the height of equipment, and handled easily reduces process cost.
Accompanying drawing explanation
Fig. 1 is the schematic diagram in tube-in-tube structure heat accumulating type limestone kiln;
Fig. 2 is the schematic diagram in girder structure heat accumulating type limestone kiln;
Fig. 3 is the schematic diagram in arch bridge structure heat accumulating type limestone kiln;
Fig. 4 is the schematic diagram of another embodiment of tube-in-tube structure heat accumulating type limestone kiln.
Wherein:
1-gas blower, 2-No. 1 T-valve, 3-preheating chamber opening for feed, 4-gas is suitable for reading, the 5-the first preheating chamber, 6-gas end opening, 7-preheating chamber discharge port, 8-material transfer equipment, 9-No. 2 T-valve, the 10-the second preheating chamber, 11-No. 3 T-valve, 12-No. 4 T-valve, 13-opening for feed, 14-suction bar, 15-firebridge, 16-upper combustion chamber, 17-injection air port, 18-injector, 19-lower combustion chamber, 20-inner core, 21-interlayer, 22-shunting body, 23-discharge port, 24-cooling blower, 25-preheating zone, 26-burning beam, 27-calcining zone, 28-lower suction bar, 29-cooling zone, 30-arch bridge, 31-kiln body, 32-No. 5 T-valve.
Embodiment
Embodiment 1
Heat accumulating type of the present invention limestone kiln as shown in Figure 1, is the limestone kiln of tube-in-tube structure, comprises kiln body, gas blower 1, cooling blower 24, feed system, discharge system and exhaust emission system.Kiln body is provided with opening for feed 13, discharge port 23, is provided with calcining zone and cooling zone in body, and calcining zone is provided with combustion equipment.Kiln body is tube-in-tube structure, and the combustion equipment in tube-in-tube structure heat accumulating type limestone kiln is combustion chamber.The calcining zone of tube-in-tube structure kiln body is provided with inner core 20,18,6 upper combustion chamber 16 of injector and 6 lower combustion chamber 19, same layer combustion chamber is evenly arranged, upper and lower layer combustion chamber staggered arrangement, between each combustion chamber and inner core, by firebridge 15, be connected, firebridge is the arch form structure that laying fireproof bricks forms.Cooling zone is provided with shunting body 22, and sleeve is provided with interlayer 21, and the bottom of interlayer is connected with blower fan, the injection air port 17 that is connected to injector suitable for reading, injector by injection air port, be connected to the top of inner core 20.The top of calcining zone is provided with suction bar 14, and suction bar is provided with the cavity of heat-eliminating medium circulation, and cooling blower is connected to cooling zone.Limestone kiln is provided with the first preheating chamber 5 and the second preheating chamber 10, the second preheating chambers are arranged on ground.The first preheating chamber and the second preheating chamber are respectively equipped with preheating chamber opening for feed 3, preheating chamber discharge port 7, gas end opening 6 and gas suitable for reading 4.Preheating chamber discharge port 7 is connected with opening for feed 13 by material transfer equipment 8, and material transfer equipment is chapelet.The gas end opening of the first preheating chamber 5 is connected with the air nozzle of suction bar 14 and combustion chamber respectively by No. 4 T-valve 12, and the gas end opening of the second preheating chamber 10 is connected with the air nozzle of suction bar 14 and combustion chamber respectively by No. 3 T-valve 11.The gas suitable for reading 4 of the first preheating chamber is connected with blowdown system with gas blower 1 respectively by No. 1 T-valve 2, and the gas of the second preheating chamber is suitable for reading to be passed through No. 2 T-valve 9 and be connected with blowdown system with gas blower 1 respectively.
The working process in tube-in-tube structure heat accumulating type limestone kiln is, limestone material enters the first preheating chamber 5 and the second preheating chamber 10 through replacing preheating chamber opening for feed 3, operate in the first preheating chamber preheating downwards and enter calcining zone calcining by preheating chamber discharge port 7, chapelet, opening for feed 13, the flue gas being produced by two-layer combustion chambers burn at calcining zone to preheating after Wingdale calcine.Lime goes out device by discharge port 23 through cooling zone is cooling.The mode of operation of upper lower combustion chamber is identical with sleeve kiln, and combustion chamber, top is little thermal load, and lower combustion chamber is large thermal load, and combustion chamber, top coal gas is excessive, lower combustion chamber air excess.The interlayer that in working process, roots blower is inner sleeve blasts cooling air, warm air after cooling sandwith layer passes into injector as injection source of the gas, the part of smoke producing after lower floor's combustion chambers burn and the warm air of cool lime are under the effect of injector, by lower inner core bottom, sucked, after injector, feed lower combustion chamber, as 2 combustion airs.Therefore,, at calcining intersegmental part, form two adverse current calcining zones and one and flow calcining zone.The mode of gas operation is, the air that gas blower 1 bloats enters the first preheating chamber through No. 1 T-valve 2 respectively, air is emitted heat at the first preheating chamber 5 by the material after accumulation of heat and is preheating to 800 ℃, and through gas end opening, 6, No. 3 16He lower combustion chamber of T-valve 11Dao upper combustion chamber 19 carry out combustion-supporting burning.The flue gas that burning produces is extracted out by suction bar 14, and flue gas is through No. 4 T-valve 12, gas end opening 6 to second preheating chamber 10 preheating limestone material and carry out accumulation of heat, and after preheating material, flue-gas temperature, lower than 100 ℃, is discharged to blowdown system through No. 2 T-valve 9.The hocket accumulation of heat and emit heat preheated air of two preheating chambers, the action by each T-valve realizes blocked operation, and whole process automation is carried out.
Embodiment 2
As shown in Figure 2, kiln body is girder structure to another embodiment of the present invention, and combustion equipment is burning beam.The calcining zone 27 of girder structure kiln body is provided with two-layer burning beam 26, and upper strata is provided with 3 burning beams, and lower floor is provided with 2 burning beams, two-layer burning beam staggered arrangement.Cooling zone 29 selects to be provided with lower suction bar 28.
Embodiment 3
As shown in Figure 4, kiln body is arch bridge structure to the 3rd kind of embodiment of the present invention, and combustion equipment is combustion chamber.The calcining zone of arch bridge structure kiln body is provided with two-layer arch bridge 30, and upper strata is provided with 3 arch bridges, and lower floor is provided with 2 arch bridges 30, two-layer arch bridge staggered arrangement, and combustion chamber is positioned at the both sides of arch bridge.The middle part of arch bridge structure kiln body is contraction structure, and the diameter of waist is less than the diameter of upper and lower.The contraction structure at middle arch bridge position, accelerates calcining zone material flow, reduces material in the residence time of high-temperature zone, is conducive to improve the activity degree of lime product.
Embodiment 4
As shown in Figure 4, the first preheating chamber 5 and the second preheating chamber 10 are positioned at the top of kiln body to the 4th kind of embodiment of the present invention.Material alternately directly enters kiln body through preheating chamber opening for feed 3 by preheating chamber discharge port 7 and opening for feed 13 and calcines.Flue gas alternately enters air after the first preheating chamber 5 and the second preheating chamber 10, the first preheating chambers and the second preheating chamber preheating through opening for feed 13 and preheating chamber discharge port 7 and through No. 5 T-valve 32, enters respectively the air nozzle of combustion chamber.Preheating chamber and the upper and lower mounting structure of kiln body are conducive to the conveying between material, save material transfer equipment, reduce facility investment, process cost and equipment maintenance cost, are conducive to long-term operation.
Claims (4)
1. a heat accumulating type limestone kiln, comprise kiln body (31), gas blower (1), cooling blower (24), feed system, discharge system and exhaust emission system, described kiln body is provided with opening for feed (13) and discharge port (23), is provided with calcining zone and cooling zone in body; Described calcining zone is provided with combustion equipment, and combustion equipment is provided with fuel oil atomizer and air nozzle, and fuel oil atomizer is connected with fuel conduit; The top of calcining zone is provided with suction bar (14) or exhanst gas outlet, suction bar is provided with the cavity of heat-eliminating medium circulation, described cooling blower is connected to cooling zone, it is characterized in that: described limestone kiln is provided with the first preheating chamber (5) and the second preheating chamber (10), and described the first preheating chamber and the second preheating chamber are arranged on the top of ground or kiln body; Described the first preheating chamber and the second preheating chamber are respectively equipped with preheating chamber opening for feed (3), preheating chamber discharge port (7), gas end opening (6) and gas (4) suitable for reading; Described preheating chamber discharge port (7) is connected with opening for feed (13) by material transfer equipment (8); The gas end opening of described the first preheating chamber (5) is connected with the air nozzle of suction bar (14) and combustion equipment respectively by No. 4 T-valve (12), and the gas end opening of described the second preheating chamber (10) is connected with the air nozzle of suction bar (14) and combustion equipment respectively by No. 3 T-valve (11); The gas (4) suitable for reading of described the first preheating chamber is connected with blowdown system with gas blower (1) respectively by No. 1 T-valve (2), and gas No. 2 T-valve (9) that pass through suitable for reading of described the second preheating chamber are connected with blowdown system with gas blower (1) respectively; Described kiln body is tube-in-tube structure, and the combustion equipment in tube-in-tube structure limestone kiln is combustion chamber; The calcining zone of described tube-in-tube structure kiln body is provided with inner core (20), injector (18), 3～8 upper combustion chamber (16) and 3～8 lower combustion chamber (19), same layer combustion chamber is evenly arranged, upper and lower layer combustion chamber staggered arrangement, is connected by firebridge (15) between each combustion chamber and inner core; Described cooling zone is provided with shunting body (22), and described sleeve is provided with interlayer (21), and the bottom of described interlayer is connected with blower fan, the interlayer injection air port (17) that is connected to injector suitable for reading, injector by injection air port, be connected to the top of inner core (20); Or described kiln body is girder structure, the combustion equipment in girder structure limestone kiln is burning beam; The calcining zone (27) of described girder structure kiln body is provided with two-layer burning beam (26), every layer of 2～5 burning beam; Burning beam body is provided with the cavity of heat-eliminating medium circulation; Or described kiln body is arch bridge structure, the combustion equipment in arch bridge structure limestone kiln is combustion chamber; The calcining zone of described arch bridge structure kiln body is provided with two-layer arch bridge (30), and every layer is provided with 2～5 arch bridges, and described combustion chamber is positioned at the both sides of arch bridge.
2. according to heat accumulating type claimed in claim 1 limestone kiln, it is characterized in that: the arch form structure that described firebridge (15) forms for laying fireproof bricks.
3. according to heat accumulating type claimed in claim 1 limestone kiln, it is characterized in that: the middle part of cooling zone (29) is provided with lower suction bar (28), lower suction bar is provided with the cavity of heat-eliminating medium circulation.
4. according to heat accumulating type claimed in claim 1 limestone kiln, it is characterized in that: described material transfer equipment is pipe chain transfer roller, chapelet or worm conveyor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210409027.7A CN102951859B (en) | 2012-10-24 | 2012-10-24 | Heat accumulating type lime kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210409027.7A CN102951859B (en) | 2012-10-24 | 2012-10-24 | Heat accumulating type lime kiln |
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| Publication Number | Publication Date |
|---|---|
| CN102951859A CN102951859A (en) | 2013-03-06 |
| CN102951859B true CN102951859B (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210409027.7A Active CN102951859B (en) | 2012-10-24 | 2012-10-24 | Heat accumulating type lime kiln |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103482889B (en) * | 2013-09-16 | 2015-04-22 | 石家庄新华能源环保科技股份有限公司 | Heat accumulating type material calcinating device |
| CN104119006B (en) * | 2014-07-04 | 2016-04-06 | 石家庄新华能源环保科技股份有限公司 | A kind of lime shaft kiln of built-in combustion room |
| CN111003950A (en) * | 2020-01-21 | 2020-04-14 | 上海柯来浦能源科技有限公司 | Beam kiln for producing lime |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557492A (en) * | 2012-01-06 | 2012-07-11 | 石家庄市新华工业炉有限公司 | Heat accumulating type double-hearth lime kiln |
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