CN203144294U - Double-heat storage burning beam-type lime kiln - Google Patents

Double-heat storage burning beam-type lime kiln Download PDF

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Publication number
CN203144294U
CN203144294U CN2013200984868U CN201320098486U CN203144294U CN 203144294 U CN203144294 U CN 203144294U CN 2013200984868 U CN2013200984868 U CN 2013200984868U CN 201320098486 U CN201320098486 U CN 201320098486U CN 203144294 U CN203144294 U CN 203144294U
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combustion
burning
air
heat
gas
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贾会平
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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Shijiazhuang Xinhua Energy Environmental Protection Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00Technologies relating to the processing of minerals
    • Y02P40/40Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Abstract

The utility model relates to a double-heat storage burning beam-type lime kiln. The double-heat storage burning beam-type lime kiln comprises a kiln body, a feeding system, a discharging system, an air supply system, a control system and an exhaust emission system, wherein a preheating zone, a burning zone and a cooling zone are formed in the kiln body, two layers of burning beams are arranged in the burning zone, each layer comprises one to five groups of burning beams, and each group of burning beams comprises air burning beams and gas burning beams. The lime kiln is provided with a heat accumulator and a burning chamber which are respectively arranged on the two ends of the air burning beams and the gas burning beams, wherein one end of the heat accumulator is respectively connected with the exhaust emission system and an air blower or a fuel gas pipeline through a triple valve, and the other end of the heat accumulator is connected with the burning chamber which is connected with the burning beams through a one-way valve. According to the double-heat storage burning beam-type lime kiln, the heat accumulator is used for preheating combustion air and fuel gas, the preheated combustion air and fuel gas enter the burning zone respectively through the air burning beams and the gas burning beams so as to burn calcined limestone materials, and the burning temperature of the low-heat value fuels is increased, so that the low-heat value fuels are fully utilized.

Description

Two heat-accumulation combustion beam-type limekilns
Technical field
The utility model belongs to building materials, chemical production equipment technical field, relates to a kind of limestone kiln, is specifically related to a kind of pair of heat-accumulation combustion beam-type limekiln.
Background technology
Be the new technology that lime is produced with the beam-type limekiln calcined limestone.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.The low calorie fuels burning does not reach the temperature of requirement, and Wingdale just 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 production 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 directly used in 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, " the 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; "." air that participates in cooling enters the rotary kiln burning as a wind, and 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 coal dust or the coke powder of high heating value in the combustion processes.
Summary of the invention
For overcoming the deficiencies in the prior art, the utility model provides a kind of pair of heat-accumulation combustion beam-type limekiln, by heat storage type preheated fuel gas and combustion air, improves the temperature of combustion of low calorie fuels, takes full advantage of the low calorie fuels resource, improves the quality of calcination product.
The two heat-accumulation combustion beam-type limekilns of the utility model are made up of kiln body, feed system, discharge system, air feed system, Controlling System and exhaust emission system.Be provided with preheating zone, calcining zone and cooling zone in the kiln body, the preheating zone is provided with 1~5 and goes up suction bar, and cooling zone is provided with 1~5 following suction bar.Calcining zone is provided with two-layer burning beam, and every layer is provided with 1~5 group of burning beam, and every group of burning beam is made up of air combustion beam and fuel gas buring beam respectively.The bottom of air combustion beam and fuel gas buring beam is respectively equipped with nozzle.The limestone kiln is provided with thermophore and combustion chamber, and thermophore and combustion chamber lay respectively at the two ends of air combustion beam and fuel gas buring beam, and the combustion chamber is provided with burner, and burner is connected with airline with gas line respectively.Thermophore is divided into air thermophore and regenerator gas device, and of air thermophore is connected with blowdown system with gas blower respectively by T-valve, and the other end is connected with the combustion chamber, and the combustion chamber is connected with the air combustion beam by check valve.One of regenerator gas device is connected with blowdown system with gas line by T-valve, and the other end is connected with the combustion chamber, and the combustion chamber is connected with the fuel gas buring beam by check valve.
Check valve is cone structure or valve board structure.The check valve of cone structure is made up of cone-shaped body and connecting passage, and connecting passage is provided with sealed structure, and cone-shaped body is positioned on the connecting passage, and the cone-shaped body center is provided with pilot hole, and burning beam is provided with backstay, and backstay inserts in the pilot hole.The material of cone-shaped body is refractory materials.The check valve of valve board structure is made up of drop in leaf and coupling shaft, and drop in leaf is connected the top of connecting passage by coupling shaft.Air combustion beam, fuel gas buring beam and following suction bar are provided with the cavity of heat-eliminating medium circulation.Heat storage in the thermophore is spherule, melikaria or grid body, and the material of heat storage is pottery, refractory materials or ferrous materials.The limestone kiln is provided with combustion gas interchanger and air heat exchanger, and last suction bar outlet is connected with exhaust emission system with air heat exchanger by the combustion gas interchanger.Gas line is connected to the fuel gas inlet of combustion chamber burner by the combustion gas interchanger, and airline is connected to the combustion air entrance of combustion chamber burner by air heat exchanger.
The burning beam of the two heat-accumulation combustion beam-type limekilns of the utility model is the twin-spar construction that air combustion beam and fuel gas buring beam are formed, by thermophore combustion air and combustion gas are carried out preheating, combustion air after the preheating and fuel gas enter the calcining zone calcined limestone material that burns by air combustion beam and fuel gas buring beam respectively, improved the temperature of combustion of low calorie fuels, optimized the calcining effect, the lime product of production high-quality is fully used the low calorie fuels resource.The hocket accumulation of heat and emit heat preheated air and combustion gas of the thermophore at air combustion beam and fuel gas buring beam two ends has guaranteed the continuity of burning beam burning and the stability of limestone kiln operation.Last suction bar is extracted smoke pre-heating combustion air and fuel gas out, further utilizes waste gas residual heat, reduces energy consumption and production costs.Be connected by check valve between combustion chamber and the burning beam, prevent that effectively the flue gas that produces in the heat-accumulating process from entering burning beam.
Description of drawings
Fig. 1 is the structural representation of the two heat-accumulation combustion beam-type limekiln heat storage type combustion girder system systems of the utility model;
Fig. 2 is the check valve synoptic diagram of cone structure;
Fig. 3 is the check valve synoptic diagram of valve board structure;
Fig. 4 is the burning beam side schematic view.
Wherein:
1-T-valve, 2-thermophore, 3-combustion chamber, 4-burner, 5-check valve, 6-air nozzle, 7-air combustion beam, 9-gas blower, 10-backstay, 11-sealed structure, 12-coupling shaft, 13-drop in leaf, 14-gas jet, 15-fuel gas buring beam, 16-cone-shaped body, 17-pilot hole, 18-connecting passage.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated, protection domain of the present utility model is not subjected to the restriction of embodiment.
The two heat-accumulation combustion beam-type limekilns of the utility model are made up of kiln body, feed system, discharge system, air feed system, Controlling System and exhaust emission system.Be provided with preheating zone, calcining zone and cooling zone in the kiln body, the preheating zone is provided with 1~5 and goes up suction bar, and cooling zone is provided with 1~5 following suction bar, and calcining zone is provided with two-layer burning beam, and every layer is provided with 1~5 group of burning beam.As shown in Figure 4, every group of burning beam is made up of air combustion beam 7 and fuel gas buring beam 15 respectively, and the bottom of air combustion beam and fuel gas buring beam is respectively equipped with nozzle.Air combustion beam 7, fuel gas buring beam 15 and following suction bar are provided with the cavity of heat-eliminating medium circulation.As shown in Figure 1, the limestone kiln is provided with a plurality of thermophore 2 and combustion chamber 3, and thermophore and combustion chamber lay respectively at the two ends of air combustion beam and fuel gas buring beam.Thermophore is divided into air thermophore and regenerator gas device, and the heat storage in the thermophore 2 is spherule, and the material of heat storage is pottery.The limestone kiln is provided with combustion gas interchanger and air heat exchanger, and combustion chamber 3 is provided with burner 4.Last suction bar outlet is connected with exhaust emission system with air heat exchanger by the combustion gas interchanger.Gas line is connected to the fuel gas inlet of combustion chamber burner 4 by the combustion gas interchanger, and airline is connected to the combustion air entrance of combustion chamber 3 burners by air heat exchanger.One of the air thermophore is connected with blowdown system with gas blower 9 respectively by T-valve 1, and the other end is connected with the combustion chamber, and the combustion chamber is passed through check valve 5 and is connected with the air combustion beam.One of regenerator gas device is connected with blowdown system with gas line by T-valve, and the other end is connected with the combustion chamber, and the combustion chamber is connected with the fuel gas buring beam by check valve.As shown in Figure 2, check valve is cone structure, is made up of cone-shaped body 16 and connecting passage 18, connecting passage is provided with sealed structure 11, and cone-shaped body is positioned on the connecting passage, and the cone-shaped body center is provided with pilot hole 17, burning beam is provided with backstay 10, and backstay inserts in the pilot hole.Backstay and pilot hole are used for the motion of restriction cone-shaped body, prevent from that cone-shaped body from being blown to turn over.The material of cone-shaped body is refractory materials.
As selection, check valve is valve board structure, as shown in Figure 3, is made of drop in leaf 13 and coupling shaft 12, and drop in leaf is connected the top of connecting passage 18 by coupling shaft.
Two heat-accumulation combustion beams are for the beam-type limekiln of low calorie fuels gas such as burning blast furnace gas.The air combustion beam is identical with the fuel gas buring girder construction, the air thermophore that is communicated with the air combustion beam is used for preheated air, the regenerator gas device that is communicated with the fuel gas buring beam is used for pre-heating fuel gas, and air combustion beam and fuel gas buring beam are arranged side by side and form a complete burning beam.Combustion gas after the preheating and air are respectively by gas jet 14 and air nozzle 6 space combustion in the burning beam bottom.Be example with the air combustion beam, the operating process of two heat-accumulation combustion beams is, during burner 4 burnings of combustion chamber, left side 3, the flue gas of generation be the heat storage accumulation of heat through left side thermophore 2, and exothermic flue gas enters blowdown system by T-valve and discharges.During combustion chambers burn, close under the effect of cone-shaped body 16 malleation in combustion chamber draft and beam body of combustion chamber and air combustion beam connecting passage 18, flue gas does not enter burning beam.After the heat storage accumulation of heat of thermophore, the T-valve commutation, this side combusion chamber's burner is closed, the burning of right side combustion chamber burner.The high-pressure air that is blasted by gas blower 9 is through the left side thermophore, the heat storage in the thermophore emit heat with preheating of air to high temperature.High temperature air is through the combustion chamber, left side, and cone-shaped body 16 jack-up with connecting passage 18 enter burning beam, again by the combustion-supporting burning of air nozzle 6 ejections on the burning beam.The cone-shaped body that high-pressure air in the burning beam will be in heating heat storage state right side connecting passage 18 compresses, and prevents that the flue gas on right side from entering in the beam.Because the suction function of exhaust emission system is negative pressure state in the thermophore heat-accumulating process, cone-shaped body is subjected to one to press an effect of drawing, and can prevent effectively that the flue gas that produces in the heat-accumulating process from entering burning beam.The operating process of fuel gas buring beam 15 is identical with the operating process of air combustion beam.Design temperature according to air thermophore and regenerator gas device discharging flue gas carries out switch operation, and when the discharged flue gas temperature was higher than design temperature, the action by T-valve commutated automatically, and the present embodiment design temperature is 150 ℃.

Claims (8)

1. two heat-accumulation combustion beam-type limekiln, formed by kiln body, feed system, discharge system, air feed system, Controlling System and exhaust emission system, be provided with preheating zone, calcining zone and cooling zone in the kiln body, the preheating zone is provided with 1~5 and goes up suction bar, and cooling zone is provided with 1~5 following suction bar; It is characterized in that: described calcining zone is provided with two-layer burning beam, and every layer is provided with 1~5 group of burning beam, and every group of burning beam is made up of air combustion beam (7) and fuel gas buring beam (15) respectively, and the bottom of described air combustion beam and fuel gas buring beam is respectively equipped with nozzle; Described limestone kiln is provided with thermophore (2) and combustion chamber (3), and thermophore and combustion chamber lay respectively at the two ends of air combustion beam and fuel gas buring beam, and the combustion chamber is provided with burner (4); Thermophore is divided into air thermophore and regenerator gas device, and one of described air thermophore is connected with blowdown system with gas blower (9) respectively by T-valve (1), and the other end is connected with the combustion chamber, and the combustion chamber is passed through check valve (5) and is connected with the air combustion beam; One of described regenerator gas device is connected with blowdown system with gas line by T-valve, and the other end is connected with the combustion chamber, and the combustion chamber is connected with the fuel gas buring beam by check valve.
2. according to claim 1 pair of heat-accumulation combustion beam-type limekiln, it is characterized in that: described check valve is cone structure or valve board structure.
3. according to claim 2 pair of heat-accumulation combustion beam-type limekiln, it is characterized in that: the check valve of described cone structure is made up of cone-shaped body (16) and connecting passage (18), connecting passage is provided with sealed structure (11), cone-shaped body is positioned on the connecting passage, the cone-shaped body center is provided with pilot hole (17), burning beam is provided with backstay (10), and backstay inserts in the pilot hole.
4. according to claim 3 pair of heat-accumulation combustion beam-type limekiln, it is characterized in that: the material of described cone-shaped body is refractory materials.
5. according to claim 2 pair of heat-accumulation combustion beam-type limekiln, it is characterized in that: the check valve of described valve board structure is made up of drop in leaf (13) and coupling shaft (12), and drop in leaf is connected the top of connecting passage (18) by coupling shaft.
6. according to claim 1 pair of heat-accumulation combustion beam-type limekiln is characterized in that: described air combustion beam (7), fuel gas buring beam (15) and following suction bar are provided with the cavity of heat-eliminating medium circulation.
7. according to claim 1 pair of heat-accumulation combustion beam-type limekiln, it is characterized in that: the heat storage in the described thermophore (2) is spherule, melikaria or grid body, the material of described heat storage is pottery, refractory materials or ferrous materials.
8. according to claim 1 pair of heat-accumulation combustion beam-type limekiln, it is characterized in that: described limestone kiln is provided with combustion gas interchanger and air heat exchanger, describedly goes up the suction bar outlet and is connected with exhaust emission system with air heat exchanger by the combustion gas interchanger; Gas line is connected to the fuel gas inlet of combustion chamber burner (4) by the combustion gas interchanger, and airline is connected to the combustion air entrance of combustion chamber (3) burner by air heat exchanger.
CN2013200984868U 2013-03-05 2013-03-05 Double-heat storage burning beam-type lime kiln Active CN203144294U (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103922617A (en) * 2014-04-15 2014-07-16 石家庄新华能源环保科技股份有限公司 Combustion beam using low-heating-value fuel and solid fuel
CN105753340A (en) * 2016-01-24 2016-07-13 赵艳枫 Calcining equipment of external combusting heat storage type lime shaft kiln

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103922617A (en) * 2014-04-15 2014-07-16 石家庄新华能源环保科技股份有限公司 Combustion beam using low-heating-value fuel and solid fuel
CN105753340A (en) * 2016-01-24 2016-07-13 赵艳枫 Calcining equipment of external combusting heat storage type lime shaft kiln
CN105753340B (en) * 2016-01-24 2018-03-20 赵艳枫 The calciner of external burning heat accumulating type lime shaft kiln

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