CN102126836A - Method and machine for calcining materials - Google Patents
Method and machine for calcining materials Download PDFInfo
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- CN102126836A CN102126836A CN2010100333904A CN201010033390A CN102126836A CN 102126836 A CN102126836 A CN 102126836A CN 2010100333904 A CN2010100333904 A CN 2010100333904A CN 201010033390 A CN201010033390 A CN 201010033390A CN 102126836 A CN102126836 A CN 102126836A
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- calcining
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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
Abstract
The invention provides a method and a machine for calcining materials. The machine mainly comprises feeding equipment, a preheating chamber, a calcining chamber, a cooling chamber, a discharging bin, an exhaust gas emission system, a heat accumulator and a carbon-containing coated pellet bin, wherein the heat accumulator is positioned on the two sides of the calcining chamber; one end of the heat accumulator is connected with the calcining chamber; and the preheating chamber, the calcining chamber, the cooling chamber, the heat accumulator, the carbon-containing coated pellet bin and the discharging bin are detachable assemblies and are assembled together through connecting pieces. The method comprises the following steps of: heating a heat accumulation body in the heat accumulator by using high-temperature flue gas generated after the materials are calcined; preheating combustion air by using heat released by the heat accumulation body; and preheating the calcined materials by using hot gas generated when a lime product is cooled in the cooling chamber. In the machine for calcining the materials, all composition equipment are manufactured separately and are assembled on site, transportation, installation and the examination, the maintenance and the replacement of the equipment are convenient, normalized production is facilitated, a calcining machine product is serialized, the utilization factor of the equipment is high, a good calcining effect is achieved, the oversintering and the underfiring of the calcined materials are prevented, and a produced lime product has high quality.
Description
Technical field
The present invention relates to a kind of equipment of calcining materials, relate in particular to a kind of method and machinery that has the assembly type calcining materials of thermal storage equipment.
Background technology
Lime etc. are important material of construction, also are important source material metallurgical, chemical field, and prior art is to be raw material with rhombspar, Wingdale, adopts the shaft furnace lime kilning of band burning beam.The deficiency of process is like this: furnace gas mobile direction is opposite with building stones mobile direction in the shaft furnace, and promptly building stones move from the top down, and furnace gas flows from bottom to top, the air resistance of building stones is big, and the gas segregation phenomenon appears in furnace pressure height easily, it is inhomogeneous to cause Wingdale to be heated, and influences quality product.The applicant the patent No. be the utility model patent of ZL200320111077.3 disclose a kind of in the external heating type limestone kiln, the firing system of this limestone kiln is provided with combustion tube of furnace beam and peripheral burner, combustion tube of furnace beam is provided with burner (burner), solved the distribution of calcining zone flame and heat effectively, improved efficiency of combustion, but combustion tube of furnace beam needs not only to slattern some heats, and increased equipment cost and process cost with heat-eliminating medium cooling beam body in the course of the work.The limestone kiln needs complete installation, is unfavorable for moving or changing, and also is unfavorable for the producing in serial form element of installation.
The applicant is the method and apparatus that the application for a patent for invention of 200810079931.X discloses a kind of lime calcining at number of patent application, described device is made up of a plurality of kiln bodies, arrangement mode is ring-like or matrix type or other form, use solid fuels such as coal dust, geseous fuel, or liquid fuel, or the propellant combination of solid, gas, liquid is in kiln or the combustion chamber internal combustion that is provided with separately, the high-temperature flue gas that produces is calcined kiln sodalime stone, and other kiln sodalime stone is carried out preheating.In the kiln body, be provided with air inlet beam and suction bar.The kiln top is provided with portable feeding device, can feed in raw material to each kiln in the system.Be provided with portable dumping device at the bottom of the kiln, its dumping device is connected with tapping channel, and the finished product ash of each kiln production is converged to together.This patent application has made full use of waste heat, saves the energy, has improved the thermo-efficiency of system, reduces production costs, and realizes large scale continuous prod.But this device is still the integration construction, does not realize the seriation assembling, exists the low deficiency of utility factor.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art, the invention provides a kind of method of calcining materials, energy is made full use of.Another object of the present invention provides a kind of machinery of realizing aforesaid method, improves the utilization coefficient of equipment, the convenient installation and use.
The method of calcining materials provided by the invention is, calcined material and fuel are placed incinerator, and bubbling air is calcined.Utilize the heat storage in the high-temperature flue gas heating thermophore after calcining, use heat storage liberated heat warm-up combustion-supporting air then; The hot gas preheating calcined material of cooling room cool lime product.Fuel is sent into calcining compartment by worm conveyor from the fuel feed bin of both sides, and the fuel feed bin is positioned at the both sides of calcining compartment.
Described calcined material is Wingdale, rhombspar, silicate or is main mixture etc. and the similar calcined material of above-mentioned substance with it; Described fuel is small-particle lump coal or carbon containing dressing pelletizing, solid fuel, liquid fuel, geseous fuel or its mixture; The dressing of described carbon containing dressing pelletizing (be called for short breathe shell) is limestone powder, rhombspar powder, silicate powder or is main mixture with it.Breathing shell inside is carbonaceous material, or carbonaceous mixture, and mixture contains above-mentioned coating substance.The breathing shell both can provide all or part of of incinerating heat, can be beneficial to calcination process again is easy to carry out, the diameter of breathing shell is changeable, the size of its inner carbonaceous material and dressing also can be changeable according to the reasons such as character of material, as adopt all or part of be liquid, gaseous state or pulverized solid fuel, can burner be set at the thermophore correct position when spraying into fuel, calcining compartment is heated.
The machinery of calcining materials provided by the invention mainly comprises: apparatus for feeding, preheating chamber, calcining compartment, cooling room, go out feed bin and exhaust emission system.Described machinery also is provided with thermophore and carbon containing dressing pelletizing feed bin, and heat storage is arranged in the thermophore, and thermophore is positioned at the both sides of calcining compartment, and an end of thermophore is connected with calcining compartment.Preheating chamber, calcining compartment, cooling room, thermophore, carbon containing dressing pelletizing feed bin and to go out feed bin be detachable member fit together by the assembling web member.The bottom of preheating chamber and calcining compartment is provided with Pneumatic reverse turning bed valve, can completely cut off gas and material when flap valve cuts out, can convey materials during unlatching.Cooling room is connected to preheating chamber, and the pneumatic outlet of preheating chamber is connected to blowdown system.The other end of thermophore is connected with blowdown system with gas blower by T-valve respectively.
As selection, thermophore is provided with the combustion chamber, and the combustion chamber is positioned at an end that is connected with calcining compartment, and described combustion chamber is provided with burner, and burner is connected to the T-valve outlet.Heat storage in the thermophore is ceramic refractory or ferrous materials, heat storage be shaped as spherule, cuboid or cellular polyhedron.Carbon containing dressing pelletizing feed bin is connected to calcining compartment by worm conveyor.Be lined with flame-proof thermal insulation material in the connecting pipeline between preheating chamber and the cooling room.Blowdown system comprises flue gas blower fan, fly-ash separator, desulfurizer and chimney.Cooling room can be provided with, also can not be provided with suction bar, makes cooling gas at the cooling room uniform distribution by suction bar, optimizes cooling performance.Described suction bar outlet is connected to the connecting pipeline between cooling room and the preheating chamber, described mechanical process control, automated operation.The cross section of calcining compartment and cooling room, preheating chamber is circular, rectangle, does not get rid of other shape.
Contain CO through the thermophore exhaust gas discharged
2Concentration higher, the flue gas purifying carbon dioxide after udst separation and the desulfurization is used for basic industry etc.Or be used for intensive farming, becoming provides intensive farming CO
2The source.
The machinery of calcining materials of the present invention is used to calcine block Wingdale, rhombspar material, small-particle Wingdale, rhombspar material or powdered lime stone, rhombspar material, cement discharging calcining and magnesia material calcining etc.
Compared with prior art, advantage of the present invention is: 1. by the accumulation of heat and the heat release of thermophore, with the direct warm-up combustion-supporting air of heat of useless flue gas, the heat preheating calcined material with the cooling calcination product makes full use of waste heat, and fuel saving reduces energy consumption.2. make fuel with carbon containing dressing pelletizing, avoid adhesion between the fuel, Wingdale or rhombspar powder dressing can also be as calcination product.3. the machinery of calcining materials is detachable state, and each component devices is separately manufactured, and field assembly makes things convenient for transportation, installation, overhaul of the equipments and replacing, helps standardization and produces the calcining machine product seriation.4. utility factor height, calcine effective, the quality product height.5. high-temperature gas and limestone material full contact, even are avoided burning and are given birth to burning, and the lime quality of production is good.6. available small-particle or pulverulent material are calcined.7. saved traditional bulky equipment with required fine coal powder process of coal calcination material and conveying thereof.
Description of drawings
The synoptic diagram of the machinery of Fig. 1 calcining materials of the present invention;
The synoptic diagram of the machinery of Fig. 2 another program calcining materials of the present invention;
Fig. 3 is a circular configuration calcining compartment sectional view; ,
Fig. 4 is a rectangular configuration calcining compartment sectional view.
Wherein:
1-feeding unit, 2-preheating chamber, 3-carbon containing dressing pelletizing feed bin, 4-combustion chamber, 5-thermophore, 6-burner, 7-cooling blower, 8-cooling room, 9-discharge zone, 10-T-valve, 11-chimney, 12-desulfurizer, 13-fly-ash separator, 14---gas blower, the Pneumatic reverse turning bed valve of 16-, 17-calcining compartment, 18-flue gas blower fan, 19-discharge port, 20-worm conveyor, 21-building stones, 22-carbon containing dressing pelletizing, 23-case shape calcining compartment, 24-burning beam.
Embodiment
The present invention is further illustrated below in conjunction with accompanying drawing.
Embodiment 1
The machinery of calcining materials of the present invention as shown in Figure 1, by apparatus for feeding 1, preheating chamber 2, calcining compartment 17, cooling room 8, go out feed bin 9, discharge port 19, two thermophore 5, two carbon containing dressing pelletizing feed bins 3, air feed system and exhaust emission systems.Preheating chamber, calcining compartment, cooling room, thermophore, carbon containing dressing pelletizing feed bin and go out feed bin and apparatus for feeding and support equipment are detachable member, each assembly is fixedly installed togather by web member.Heat storage is arranged in the thermophore, and heat storage is the steel spherule.Thermophore is positioned at the both sides of calcining compartment, and an end is connected with calcining compartment, and the other end is connected with blowdown system with gas blower by T-valve 10 respectively.The bottom of preheating chamber and calcining compartment is provided with Pneumatic reverse turning bed valve 16, is used for regularly blanking.When cutting out, flap valve can completely cut off gas and material, and can convey materials during unlatching.Carbon containing dressing pelletizing feed bin is connected to calcining compartment by worm conveyor 20, carries carbon containing dressing pelletizing for calcining compartment and makes fuel.Cooling blower 7 is connected to cooling room 8, and cooling room is connected to preheating chamber 2, and the preheating chamber pneumatic outlet is connected to blowdown system.Blowdown system comprises flue gas blower fan 18, fly-ash separator 13, desulfurizer 12 and chimney 11.
The process of calcining materials machinery calcining materials of the present invention is: the calcined material Wingdale enters preheating chamber 2 through apparatus for feeding 1, hot gas behind cooling room cool lime product enters the even preheating limestone material of preheating chamber by the road, material after the preheating enters calcining compartment 17 through Pneumatic reverse turning bed valve 16, and the carbon containing dressing pelletizing that acts as a fuel is transported to calcining compartment from carbon containing dressing pelletizing feed bin by worm conveyor 20 and calcines.Described carbon containing dressing pelletizing is a nuclear with the carbon dust ball, and outer coatings adds tackiness agent with limestone powder and is bonded.As shown in Figure 3, carbon containing dressing pelletizing 21 is fan-shaped distribution in the both sides of calcining compartment, and building stones 22 are positioned at the center of calcining compartment.The Pneumatic reverse turning bed valve of calcination product lime through the calcining compartment bottom enters cooling room 8 and cools off, and cools off back lime through discharge zone 9, discharge port 19 dischargings.Combustion air enters the combustion-supporting burning of calcining compartment by gas blower 14 air blast through the T-valve 10 in left side, the thermophore 5 in left side, in the combustion processes, with the outer coatings fragmentation of temperature rising carbon containing dressing pelletizing, fuel combustion calcined limestone material.High-temperature flue gas after the calcining arrives blowdown system through the thermophore 5 on right side, the T-valve 10 on right side.Heat storage in the smoke pre-heating thermophore, discharged flue gas drop to below 150 ℃, and flue gas is discharged into atmosphere through fly-ash separator 13, desulfurizer 12, flue gas blower fan 18 and chimney 11.After right side thermophore exit gas temperature reaches design temperature, T-valve 10 commutations of both sides, it is combustion-supporting that the thermophore 5 of combustion air through right side T-valve 10, right side enters calcining compartment, and the right side thermophore is emitted the heat warm-up combustion-supporting air.High-temperature flue gas after the calcining discharges to blowdown system through the thermophore and the left side T-valve in left side.By the T-valve commutation, the operation of both sides thermophore switch operation, hocket accumulation of heat and heat release are controlled the T-valve commutation by the temperature of setting thermophore 5 outlet flue gases, and the temperature out of the thermophore that present embodiment is set is 150 ℃.Cooling air is sent into cooling room 8 by cooling blower 7, and the warm air after the cool lime enters preheating chamber preheating limestone material by the road uniformly, discharges to blowdown system through pneumatic outlet then.The total system process control, automated operation.
Embodiment 2
Another embodiment of the present invention as shown in Figure 2, described thermophore 5 is provided with combustion chamber 4, an end of combustion chamber is connected with calcining compartment, the combustion chamber is provided with air burner 6, the air burner is connected to the outlet of T-valve, connecting pipeline is provided with valve.The left side burner is connected to the T-valve outlet on right side, and the burner on right side is connected to the T-valve outlet in left side.Cooling room is provided with suction bar 24, makes cooling gas at the cooling room uniform distribution by suction bar, optimizes cooling performance, and the suction bar outlet is connected to the connecting pipeline between cooling room and the preheating chamber.As shown in Figure 4, calcining compartment is a rectangular box shape body structure, and the both sides of case shape calcining compartment 23 are equipped with three worm conveyors respectively, and three shared carbon containing dressing pelletizing feed bins 3 of worm conveyor are carried dressing pelletizing fuel from carbon containing dressing pelletizing feed bin to calcining compartment.The part inflammable gas that produces in calcination process comes out in combustion chambers burn from calcining compartment, and the flue gas that burning produces is with the flue gas preheating heat storage that comes out from calcining compartment.Both can burn the part inflammable gas that calcining compartment produces, make full use of heat energy, help environment protection again.Other structure and the operation of present embodiment are identical with embodiment 1, repeat no more.
Claims (10)
1. the method for a calcining materials, calcined material and fuel are placed incinerator (17), bubbling air is calcined, and it is characterized in that: utilize the heat storage in the high-temperature flue gas heating thermophore (5) after calcining, use heat storage liberated heat warm-up combustion-supporting air then; Calcined material in the hot gas preheating preheating chamber (2) of cooling room (8) cool lime product; Described fuel is sent into calcining compartment by worm conveyor from both sides, and fuel bunker (can be carbon containing dressing pelletizing feed bin) is positioned at the both sides of calcining compartment.
2. according to the method for the described calcining materials of claim 1, it is characterized in that: described calcined material is Wingdale, rhombspar, silicate or is main mixture etc. and the similar calcined material of above-mentioned substance with it; Described fuel is a kind of of following fuel or their mixture: small-particle lump coal, carbon containing dressing pelletizing, solid fuel, liquid fuel, geseous fuel or its mixture; The dressing of described carbon containing dressing pelletizing (be called for short breathe shell) is limestone powder, rhombspar powder, silicate powder or is main mixture with it.Breathing shell inside is carbonaceous material, or carbonaceous mixture, can contain one or more of above-mentioned coating substance in the mixture.The breathing shell both can provide all or part of of incinerating heat, can be beneficial to calcination process again is easy to carry out, the diameter of breathing shell is changeable, the size of its inner carbonaceous material and dressing also can be changeable according to the reasons such as character of material, as adopt all or part of be liquid, gaseous state or pulverized solid fuel, can burner be set at thermophore or its peripheral correct position when spraying into fuel, calcining compartment is heated.Calcining compartment calcining temperature or calcination-temperature profile temperature indicative can be from room temperature to 3000 ℃ selections arbitrarily.
3. the machinery of a calcining materials, mainly comprise: apparatus for feeding (1), preheating chamber (2), calcining compartment (17), cooling room (8), go out feed bin (9) exhaust emission system, it is characterized in that: described machinery also is provided with thermophore (5) and carbon containing dressing pelletizing feed bin (3), described thermophore is positioned at the both sides of calcining compartment, one end of thermophore is connected with calcining compartment, and heat storage is arranged in the thermophore; Described preheating chamber, calcining compartment, cooling room, thermophore, carbon containing dressing pelletizing feed bin and to go out feed bin be detachable member fit together with the assembling web member; And allow for convenient above-mentioned each chamber of whole technological process or storehouse can establish a plurality of so that calcined material or calcining materials heat easily or cool off, the bottom of described preheating chamber and calcining compartment is provided with Pneumatic reverse turning bed valve (16), when cutting out, flap valve can completely cut off gas and material, and can convey materials during unlatching; Cooling air cools off calcining materials equably and is connected to preheating chamber by pipeline at cooling room in the described cooling room, gas is at the preheating chamber uniform distribution, abundant preheating calcined material, the pneumatic outlet of preheating chamber is connected to blowdown system, and the other end of described thermophore is connected with blowdown system with gas blower by T-valve (10) respectively.
4. according to the machinery of the described calcining materials of claim 3, it is characterized in that: described thermophore is provided with combustion chamber (4), and the combustion chamber is positioned at an end that is connected with calcining compartment (17), and the combustion chamber is provided with burner (6), and burner is connected to the T-valve outlet.
5. according to the machinery of the described calcining materials of claim 3, it is characterized in that: the heat storage in the described thermophore is ceramic refractory or metallic substance; Described heat storage be shaped as spherule, cuboid or cellular polyhedron.All or part of of permission heat storage is calcined material, solid fuel or breathes shell itself, when making it play the heat storage effect, play calcining compartment, and will be calcined to calcined material or solid fuel to a certain degree or breathe shell and be transported to calcining compartment or directly enter cooling room (8).
6. according to the machinery of the described calcining materials of claim 3, it is characterized in that: described carbon containing dressing pelletizing feed bin is connected to calcining compartment by worm conveyor (20).When breathing shell or solid fuel and entering calcining compartment with calcined material mix pattern can be the disperse mixing also can subregion based on the mixing of certain material, its blending ratio can be 0～100%.
7. according to the machinery of the described calcining materials of claim 3, it is characterized in that: be lined with flame-proof thermal insulation material in the connecting pipeline between described preheating chamber and the cooling room.
8. according to the machinery of the described calcining materials of claim 3, it is characterized in that: described cooling room is provided with suction bar (24), also can not be provided with suction bar, make cooling gas at the cooling room uniform distribution by suction bar, optimize cooling performance, described suction bar outlet is connected to the connecting pipeline between cooling room and the preheating chamber, described mechanical process control, automated operation.
9. according to the machinery of the described calcining materials of claim 3, it is characterized in that: have only inflammable gas seldom in institute's discharging waste gas, and temperature is lower.Contain CO through the thermophore exhaust gas discharged
2Concentration higher, the flue gas purifying carbon dioxide after udst separation and the desulfurization is used to make industry such as alkali or is used for intensive farming, becoming provides intensive farming CO
2The source.
10. according to the machinery of the described calcining materials of claim 3, it is characterized in that: described blowdown system comprises flue gas blower fan (18), fly-ash separator (13), desulfurizer (12) and chimney (11).
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| CN2010100333904A CN102126836B (en) | 2010-01-18 | 2010-01-18 | Method and machine for calcining materials |
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| CN2010100333904A CN102126836B (en) | 2010-01-18 | 2010-01-18 | Method and machine for calcining materials |
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| CN102126836B CN102126836B (en) | 2012-11-28 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104404242A (en) * | 2014-11-12 | 2015-03-11 | 宁夏嘉翔自控技术有限公司 | Magnesium metal smelting dolomite calcination bunker bonded abrasion resistance device |
| CN106989590A (en) * | 2017-04-20 | 2017-07-28 | 中钢集团鞍山热能研究院有限公司 | A kind of bicyclic room alternately heating filters the intelligent calciner plant of dirt and method for calcinating certainly |
| CN106196146B (en) * | 2016-06-29 | 2019-05-24 | 北京航空航天大学 | A kind of energy-saving thermal storage formula high temperature pure air pilot system |
| CN115558810A (en) * | 2022-10-29 | 2023-01-03 | 内蒙古新雨稀土功能材料有限公司 | Method and device for extracting rare earth from bastnaesite |
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| CN101358770B (en) * | 2008-09-05 | 2011-12-07 | 江阴市石油化工设备有限公司 | Method for utilizing flue gas low-temperature heat quantity for industrial furnace |
| CN101575670B (en) * | 2009-06-24 | 2012-08-22 | 中冶长天国际工程有限责任公司 | Pellet ore pre-heating method, preparation method and device therefor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404242A (en) * | 2014-11-12 | 2015-03-11 | 宁夏嘉翔自控技术有限公司 | Magnesium metal smelting dolomite calcination bunker bonded abrasion resistance device |
| CN106196146B (en) * | 2016-06-29 | 2019-05-24 | 北京航空航天大学 | A kind of energy-saving thermal storage formula high temperature pure air pilot system |
| CN106989590A (en) * | 2017-04-20 | 2017-07-28 | 中钢集团鞍山热能研究院有限公司 | A kind of bicyclic room alternately heating filters the intelligent calciner plant of dirt and method for calcinating certainly |
| CN106989590B (en) * | 2017-04-20 | 2022-12-02 | 中钢集团鞍山热能研究院有限公司 | Double-ring-chamber alternate heat supply self-dust-filtering intelligent calcining device and calcining method |
| CN115558810A (en) * | 2022-10-29 | 2023-01-03 | 内蒙古新雨稀土功能材料有限公司 | Method and device for extracting rare earth from bastnaesite |
| CN115558810B (en) * | 2022-10-29 | 2023-08-15 | 内蒙古新雨稀土功能材料有限公司 | Method and device for extracting rare earth from bastnaesite |
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Owner name: SHIJIAZHUANG XINHUA ENERGY ENVIRONMENTAL TECHNOLOG Free format text: FORMER OWNER: JIA HUIPING Effective date: 20130114 |
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Effective date of registration: 20130114 Address after: 051431 Hebei city of Shijiazhuang province Luancheng douyu town equipment manufacturing base of Xinhua Road No. 6 (douyu West Middle School) Patentee after: Shijiazhuang Xinhua Energy and Environmental Protection Technology Co., Ltd. Address before: 050091 Hebei city of Shijiazhuang Province in the South Street Palace Road No. 88 Patentee before: Jia Huiping |