CN102219402B - Method and device for calcining materials - Google Patents
Method and device for calcining materials Download PDFInfo
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- CN102219402B CN102219402B CN201110094258A CN201110094258A CN102219402B CN 102219402 B CN102219402 B CN 102219402B CN 201110094258 A CN201110094258 A CN 201110094258A CN 201110094258 A CN201110094258 A CN 201110094258A CN 102219402 B CN102219402 B CN 102219402B
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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 device for calcining materials. The device has a splitting type structure comprises a burning chamber, preheating chambers, a calcining chamber, cooling chambers, a heat accumulator, a gas processing unit, a material conveying machine, a feed device, a discharge device and an exhaust gas discharging system. Material to be calcined is conveyed by the material conveying machine between the preheating chambers, between the preheating chambers and the calcining chamber, between the calcining chamber and the cooling chamber and between the cooling chambers. Smoke generated by the burning in the external burning chamber is processed by the gas processing unit, and then enters the burning chamber for calcining the material. Air for cooling lime and preheating limestone material is subject to dust removing by a cyclone separator and is preheated by the heat accumulator, and then enters the burning chamber for supporting combustion. In the invention, the fuel burning and the material calcining are separated, so that the pollution of lime products caused by harmful substances can be avoided, and the quality of the lime product can be improved. The gas is subject to dust removing and then enters the heat accumulator, thus avoiding blocking a gas channel in the heat accumulator. The material conveying machine is used for conveying the material, so that the conveying efficiency is high, and the occupied space is small.
Description
Technical field:
The invention belongs to chemical production technical field, relate to a kind of method and apparatus of calcining materials, be specifically related to a kind of improvement of method and apparatus of split type calcining materials.
Background technology:
Lime also is important source material metallurgical, chemical engineering industry except being the important material of construction.Conventional art is to be starting material with rhombspar, Wingdale, adopts the shaft furnace of band burning beam to be sintered into lime.Such process deficiency is: the building stones in the shaft furnace move from the top down, and furnace gas flows from bottom to top, and furnace gas mobile direction and building stones mobile are in the opposite direction; The air resistance of building stones is big, and furnace pressure is high, occurs the gas segregation phenomenon 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 air burner, and combustion tube of furnace beam is provided with burner (burner), has solved the distribution of calcining zone flame and heat effectively; Improved efficiency of combustion; But combustion tube of furnace beam need cool off the beam body with heat-eliminating medium in the course of the work, not only slatterns some heats, and has increased equipment cost and process cost.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 201010156632.9 application for a patent for invention discloses a kind of calcining materials at number of patent application; The preheating chamber of said equipment, calcining compartment and cooling room are split-type structural; Preheating chamber is divided into low-temperature prewarming chamber and high temperature preheating chamber, and cooling room is divided into high temperature cooling chamber and subcooling chamber.Calcined material is carried through bucket type up-down handling equipment between apparatus for feeding, low-temperature prewarming chamber, high temperature preheating chamber, calcining compartment, high temperature cooling chamber, subcooling chamber.Calcined material carries out preheating, calcining and process of cooling in split type preheating chamber, calcining compartment and cooling room, process calcination product.High-temperature gas behind the cooling room chilled product is delivered to preheating chamber preheating calcined material through gas piping.This patent makes full use of heat energy, saves heat-exchange equipment, reduces greenhouse gas emission, helps environment protection.The equipment of this patent is separately made, and field assembly makes things convenient for transportation, installation, equipment inspection and replacing, helps standardization and produces.But this patented technology mixes fuel and Wingdale at calcining compartment, and directly burning makes decomposition of limestone, and the objectionable impuritiess such as sulphur in incendiary dust and the flue gas are attached directly to the surface of lime product, influence the quality of lime product.The gas that contains dust behind cool lime and the preheating Wingdale gets into thermophore, accumulates between the heat storage, and the barrier gas circulation passage reduces heat exchange efficiency, needs often cleaning.
Summary of the invention:
For overcoming the deficiency of above-mentioned prior art, the present invention provides a kind of burning and heating medium cleaning gas, lime product is polluted little calcining materials method, improves the quality of calcination product.Another object of the present invention provides a kind of device of realizing above-mentioned calcining materials method.
The method of calcining materials provided by the invention does, calcined material carries out preheating, calcining and process of cooling through split type roasting assembly, processes lime product, and calcining temperature is 800～1600 ℃.Calcined material is between each preheating chamber, between preheating chamber and the calcining compartment, between calcining compartment and the cooling room and carry through material conveyor between each cooling room.Fuel, combustion-supporting gas burn in external combustion chamber, and to the calcining compartment calcining materials, the flue gas that leaves calcining compartment arrives the exhaust emission system discharging to the flue gas of generation through the smoke duster dedusting, after thermophore is emitted heat after gas treatment equipment is handled.Gas behind the cooling room cool lime product is delivered to preheating chamber preheating calcined material through gas piping, after cyclonic separator dedusting and thermophore preheating, arrives the combustion-supporting burning in combustion chamber then.
Calcined material is Wingdale or rhombspar.Fuel is solid fuel, liquid fuel or geseous fuel, or the combination of above-mentioned two or three fuel.Solid fuel is coal dust or coke powder, and combustion-supporting gas is air, pure oxygen or oxygen rich gas, and the oxygen level of oxygen rich gas is 21～100%.
The present invention provides a kind of device of calcining materials, and said device is a split-type structural.Device comprises: preheating chamber, calcining compartment, cooling room, thermophore, apparatus for feeding, discharging equipment and exhaust emission system.Preheating chamber is connected with apparatus for feeding, and cooling room is connected with discharging equipment, between each preheating chamber, between preheating chamber and the calcining compartment, between calcining compartment and the cooling room and be connected through material conveyor between each cooling room.Gas blower is connected with cooling room 13b, and cooling room 13b is connected with cooling room 13a, preheating chamber 9b and preheating chamber 9a through gas piping successively, and outlet is connected to the bottom inlet from top between each chamber.Said device also is provided with external combustion chamber, gas treatment equipment and smoke duster.The preheating chamber outlet is connected to the combustion chamber through cyclonic separator, T-valve and thermophore.The gas fume of combustion chamber outlet is connected to calcining compartment through gas treatment equipment, and the calcining compartment pneumatic outlet is connected to exhaust emission system through smoke duster, T-valve and thermophore.
Material conveyor is worm conveyor, chapelet, pipe chain lift or board chain hoisting machine.Worm conveyor is a upright structures, mainly is made up of transmission rod, riser tubing, rotary feeding mouth, rotation discharge port, transmission mechanism, motor and base.Thermophore is a vertical structure, and heat storage is housed in the thermophore, and the material of heat storage is ferrous materials, pottery or heat-stable material, heat storage be shaped as spheroplast, column, rectangular block shape body or melikaria or the mixture of above-mentioned shape heat storage.The combustion chamber is provided with 1～10 burner, and exhanst gas outlet is positioned at the opposite of burner; Said burner is geseous fuel burner, liquid fuel burner or solid fuel burner, or the combination of above-mentioned two or three burner.Device is provided with interchanger, and interchanger is a recuperative heat exchanger, and gas blower is connected with water cooler through interchanger.Gas treatment equipment comprises dust removal installation or/and sweetener.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney.The cross section of preheating chamber, calcining compartment and cooling room is circle, rectangle or accurate rectangle.The outside of preheating chamber, calcining compartment, cooling room and thermophore is provided with thermal insulation layer.Gas piping is adiabatic transfer line, is lined with flame-proof thermal insulation material in the gas piping.
The effect that the present invention is useful is: 1. through external combustion chamber; Fuel is in combustion chambers burn; The high-temperature flue gas that produces arrives calcining compartment calcined limestone material through the gas treatment equipment dedusting or/and the back is handled in desulfurization; Fuel combustion and calcining materials separate, and avoid objectionable impurities such as dust and sulfurous gas pollution lime product in the flue gas, improve the quality and the purity of lime product.2. get into thermophore after the process of the gas behind cool lime and the preheating Wingdale cyclonic separator dust removal process, avoid stopping up gas passage in the thermophore, reduce the parking clearing times, prolong the work period, improve heat exchange efficiency.3. use two worm conveyors between each preheating chamber and between preheating chamber and the calcining compartment, convey materials between cooling room and the calcining compartment and between each cooling room, transport efficiency is high, and it is little to take up an area of the space.Worm conveyor is simple in structure, is easy to maintenance, is suitable for the charging and discharging mouth of any direction and height, makes things convenient for the planning of integral device.Helical feed machine inlet capable, discharge port rotary moveable door turn to flexibly, cooperate automated operation, become the shared device of mass transport between each chamber.4. exhaust gas emission outlet mounting heat exchanger makes full use of fume afterheat, makes the heat energy utilization optimizing.5. the roasting assembly of split-type structural uses fresh air cool lime product, reduces lime and CO
2Lime product carbonating problem is avoided in contact.6. calcined material can use fritter shape material or powder, saves high-quality raw material.Calcining temperature is high, and speed is fast, effective.7. because calcining compartment, cooling room and preheating chamber branch are arranged, and calcining compartment can adopt high temperature to carry out the material calcination, little to cooling room and preheating chamber influence, improve operating rate and calcination quality.
Description of drawings
Fig. 1 is the schematic flow sheet of calcining materials device of the present invention;
Fig. 2 is a vertical type worm conveyor structural representation.
Wherein:
1a; The 1b-T-valve; 2-coal powder injection equipment; The 3-combustion chamber; 4a; The 4b-thermophore; The 5-cyclonic separator; The 6-gas treatment equipment; The 7-calcining compartment; The 8-apparatus for feeding; 9a; The 9b-preheating chamber; 10a; The 10b-worm conveyor; The 11-interchanger; The 12-gas blower; 13a; The 13b-cooling room; 14-discharging equipment; 15-rotates discharge port; The 16-riser tubing; The 17-transmission rod; The 19-base; The 20-transmission mechanism; The 21-motor; 22-rotary feeding mouth; The 23-valve; The 24-smoke duster.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
The device of calcining materials of the present invention is as shown in Figure 1, comprising: combustion chamber 3, preheating chamber (9a, 9b), calcining compartment 7, cooling room (13a, 13b), cyclonic separator 5, interchanger 11, worm conveyor (10a, 10b), smoke duster 24, thermophore (4a, 4b), apparatus for feeding 8, discharging equipment 14 and exhaust emission system.Device is combustion chamber, preheating chamber, calcining compartment and cooling room split-type structural.Preheating chamber 9a is the low-temperature prewarming chamber, and preheating chamber 9b is the high temperature preheating chamber, and cooling room 13a is the high temperature cooling chamber, and cooling room 13b is the subcooling chamber.The opening for feed of preheating chamber, calcining compartment and cooling room lays respectively at top, and discharge port is positioned at the bottom.Preheating chamber 9a is connected with apparatus for feeding, and cooling room 13b is connected with discharging equipment.Between preheating chamber 9a and the preheating chamber 9b, be connected through worm conveyor 10a between preheating chamber 9b and the calcining compartment 7, between calcining compartment and the cooling room 13a, be connected through worm conveyor 10b between cooling room 13a and the cooling room 13b.As shown in Figure 2, worm conveyor 10 is a upright structures, is made up of transmission rod 17, riser tubing 16, rotary feeding mouth 22, rotation discharge port 15, transmission mechanism 20, motor 21 and base 19.The opening for feed of each chamber is connected with the rotation discharge port 15 that helical feed connects, and the discharge port of each chamber is connected with the rotary feeding mouth 22 of worm conveyor.Gas blower 12 outlet is divided into two-way, and one the tunnel is connected with water cooler 13b, and the interchanger 11 of leading up to is connected with water cooler 13b, and two-way all is provided with valve 23, is used to regulate the temperature of entering cooling room 13b air.Cooling room 13b is connected with cooling room 13a, preheating chamber 9b and preheating chamber 9a through gas piping successively, and outlet is connected to the bottom inlet from top between each chamber.Preheating chamber 9a exports the burner place that is connected to combustion chamber 3 through cyclonic separator 5, T-valve 1a and thermophore 4a, 4b, and the thermophore outlet is provided with valve 23.Be provided with 1～10 solid fuel burner in the combustion chamber, burner is connected with coal powder injection equipment 2, and exhanst gas outlet is positioned at the opposite of burner.The gas fume of combustion chamber outlet is connected to calcining compartment 7 through gas treatment equipment 6, and gas treatment equipment comprises dust removal installation, and dust removal installation is the gravity settling fly-ash separator.The calcining compartment pneumatic outlet is connected to exhaust emission system through smoke duster 24, T-valve 1b, thermophore (4a, 4b), interchanger 11, and the thermophore outlet is provided with valve 23.Smoke duster is the gravity settling fly-ash separator.Thermophore is a vertical structure, and heat storage is the steel spherule in the thermophore.Exhaust emission system comprises fly-ash separator, induced draft fan and chimney, and fly-ash separator is a sack cleaner.The cross section of preheating chamber, cooling room and thermophore is circular, and the cross section of combustion chamber, calcining compartment is a rectangle.Combustion chamber, preheating chamber, calcining compartment, cooling room and thermophore outside are provided with thermal insulation layer.Gas piping is adiabatic transfer line, is lined with flame-proof thermal insulation material in the gas piping.
Present embodiment is a calcined material with the Wingdale, is fuel with the pulverized anthracite, and calcination process is: Wingdale is delivered to preheating chamber 9a through apparatus for feeding 8 through material inlet, and the high temperature air that comes from preheating chamber 9b carries out preheating to the limestone material the preheating chamber 9a.Be preheated to 200～300 ℃ limestone material and send into preheating chamber 9b through worm conveyor and carry out high temperature preheating, the Wingdale that is preheated to 700～800 ℃ is sent into calcining compartment 7 through worm conveyor.The Wingdale of the high-temperature flue gas of coming from combustion chamber 3 after to preheating calcined, and calcining temperature is 1200～1400 ℃.Lime after the calcining is sent into cooling room 13a through worm conveyor and is carried out high temperature cooling; Lime temperature behind the high temperature cooling is 600～700 ℃; Send into cooling room 13b through worm conveyor by cooling room 13a again and carry out subcooling; Lime temperature after the subcooling is 100～200 ℃, and cooled lime product goes out device through discharging equipment 14.The cooling air that is produced by gas blower 12 divides two-way, and one the tunnel through interchanger 11 entering cooling room 13b, and one the tunnel directly gets into cooling room 13b, regulates the temperature that gets into cooling room 13b air through the valve on the two-way 23.Cooling air cools off cooling room 13b earlier, and the air after temperature raises cools off the high temperature lime that is got into cooling room by calcining compartment to cooling room 13a through airline.The air that raises through temperature after subcooling and the high temperature cooling lime product gets into preheating chamber 9b, 9a preheating limestone material successively.Leave air combustion-supporting burning to the combustion chamber after cyclonic separator dedusting and thermophore preheating of preheating chamber 9a.The air mixed burning of coal dust after coal powder injection equipment 2 arrives combustion chamber and preheating, the flue gas of generation arrives calcining compartment calcined limestone material after the gas treatment equipment dust removal process.Leave the waste gas of calcining compartment and after smoke duster 24 dedustings, emit heat, behind interchanger 11 recovery waste heats, discharge again to exhaust emission system at thermophore 4a, 4b.Two thermophore accumulation of heat heat release alternate runs; Operating process does; The high-temperature flue gas that leaves calcining compartment 7 after T-valve 1b gets into thermophore 4a, is passed to the heat storage in the thermophore to heat in the smoke duster dedusting, then through valve 23, interchanger 11 to the exhaust emission system discharging.The air that leaves cyclonic separator 5 this moment gets into thermophore 4b through T-valve 1a, and the heat storage in the thermophore is emitted the heat preheated air, the combustion-supporting burning of air admission combustion chamber burner after the preheating.To the exhaust emission system discharging, air is combustion-supporting to the combustion chamber after thermophore 4a preheating after thermophore 4b heat release for switching-over then, flue gas.According to the mensuration temperature control switching-over of thermophore outlet flue gas, the temperature value of present embodiment control switching-over is 150 ℃, when the thermophore exit gas temperature is lower than 150 ℃, commutates.Switch operation is carried out in the action of the outlet valve 23 through T-valve 1a, 1b and thermophore automatically.
Claims (10)
1. the method for a calcining materials; Calcined material is Wingdale or rhombspar; Calcined material carries out preheating, calcining and process of cooling through split type roasting assembly; Process lime product; Calcining temperature is 800～1600 ℃, said calcined material between preheating chamber I (9a) and the preheating chamber II (9b), between preheating chamber (9b) and the calcining compartment (7), between calcining compartment and the cooling room I (13a) and between cooling room I (13a) and the cooling room II (13b) through the material conveyor conveying, it is characterized in that: fuel, combustion-supporting gas burn in external combustion chamber (3); To the calcining compartment calcining materials, the flue gas that leaves calcining compartment arrives the exhaust emission system discharging to the flue gas that produces through the smoke duster dedusting, after thermophore (4a, 4b) is emitted heat after gas treatment equipment (6) is handled; Gas behind the cooling room cool lime product is delivered to preheating chamber preheating calcined material through gas piping, after cyclonic separator dedusting and thermophore preheating, arrives the combustion-supporting burning in combustion chamber then.
2. the method for calcining materials according to claim 1; It is characterized in that: said fuel is solid fuel, liquid fuel or geseous fuel; Or the combination of above-mentioned two or three fuel; Said solid fuel is a coal dust, and said combustion-supporting gas is an oxygen rich gas, and the oxygen level of oxygen rich gas is 21～100%.
3. the device of a calcining materials; Said device is a split-type structural; Comprise: preheating chamber I (9a), preheating chamber II (9b), calcining compartment (7), cooling room I (13a), cooling room II (13b), thermophore (4a, 4b), apparatus for feeding (8), discharging equipment (14) and exhaust emission system; Said preheating chamber I (9a) is connected with apparatus for feeding; Cooling room II (13b) is connected with discharging equipment; Between each preheating chamber, between preheating chamber and the calcining compartment, between calcining compartment and the cooling room and be connected through material conveyor between each cooling room; Gas blower (12) is connected with cooling room II (13b), and cooling room II (13b) is connected with cooling room I (13a), preheating chamber II (9b) and preheating chamber I (9a) through gas piping successively, and outlet is connected to the bottom inlet from top between each chamber; It is characterized in that: said device also is provided with external combustion chamber (3), gas treatment equipment (6) and smoke duster (24); Preheating chamber I (9a) outlet is connected to combustion chamber (3) through cyclonic separator (5), T-valve (1a) and thermophore (4a, 4b), and the gas fume of combustion chamber outlet is connected to calcining compartment (7) through gas treatment equipment (6), and the calcining compartment pneumatic outlet is connected to exhaust emission system through smoke duster (24), T-valve (1b) and thermophore (4a, 4b).
4. the device of calcining materials according to claim 3, it is characterized in that: said material conveyor is worm conveyor (10a, 10b), chapelet, pipe chain lift or board chain hoisting machine.
5. the device of calcining materials according to claim 4; It is characterized in that: said worm conveyor is a upright structures, mainly is made up of transmission rod (17), riser tubing (16), rotary feeding mouth (22), rotation discharge port (15), transmission mechanism (20), motor (21) and base (19).
6. the device of calcining materials according to claim 3; It is characterized in that: said thermophore is a vertical structure; Heat storage is housed in the thermophore; The material of said heat storage is a heat-stable material, heat storage be shaped as spheroplast, column, rectangular block shape body or melikaria or the mixture of above-mentioned shape heat storage.
7. the device of calcining materials according to claim 3, it is characterized in that: said combustion chamber is provided with 1～10 burner, and exhanst gas outlet is positioned at the opposite of burner; Said burner is geseous fuel burner, liquid fuel burner or solid fuel burner, or the combination of above-mentioned two or three burner.
8. the device of calcining materials according to claim 3, it is characterized in that: said device is provided with interchanger (11), and said interchanger is a recuperative heat exchanger; Gas blower (12) is connected with cooling room II (13b) through interchanger.
9. the device of calcining materials according to claim 3, it is characterized in that: said gas treatment equipment comprises dust removal installation or/and sweetener; Said exhaust emission system comprises fly-ash separator, induced draft fan and chimney.
10. the device of calcining materials according to claim 3 is characterized in that: the cross section of preheating chamber, calcining compartment and cooling room is circular, rectangle or accurate rectangle, and the outside of preheating chamber, calcining compartment, cooling room and thermophore is provided with thermal insulation layer; Said gas piping is adiabatic transfer line, is lined with flame-proof thermal insulation material in the gas piping.
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| CN201110094258A CN102219402B (en) | 2011-04-14 | 2011-04-14 | Method and device for calcining materials |
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| CN201110094258A CN102219402B (en) | 2011-04-14 | 2011-04-14 | Method and device for calcining materials |
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| CN102219402A CN102219402A (en) | 2011-10-19 |
| CN102219402B true CN102219402B (en) | 2012-10-10 |
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| CN102627415A (en) * | 2012-04-20 | 2012-08-08 | 桂林灵川县金山思达新型材料厂 | Energy-saving environmental-friendly lime production line for rotary electrical kiln |
| CN103043697B (en) * | 2012-12-28 | 2014-12-24 | 刘立文 | Device for producing calcium oxide by using gypsum |
| CN104129930A (en) * | 2014-07-30 | 2014-11-05 | 石家庄新华能源环保科技股份有限公司 | Calcining apparatus with powder coal as fuel |
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| CN108863114B (en) * | 2018-07-06 | 2021-09-21 | 沈阳化工大学 | Method for recycling waste heat in magnesite light burning process |
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| CN109052998A (en) * | 2018-10-29 | 2018-12-21 | 陈建刚 | A kind of horizontal boiling furnace and the method using its calcining little particle lime stone |
| CN109761519B (en) * | 2019-03-15 | 2024-04-09 | 泰安杰普石膏科技有限公司 | Intelligent calcining system for building gypsum and using method |
| CN112707656A (en) * | 2021-02-20 | 2021-04-27 | 李志勇 | Gas-fired active lime kiln |
| CN114689789B (en) * | 2022-04-11 | 2023-08-15 | 国网浙江省电力有限公司电力科学研究院 | Flexibility reforms transform unit oxygen boosting burning and hydrogen energy storage safety utilization experimental system |
| CN116267511A (en) * | 2023-02-23 | 2023-06-23 | 昆明理工大学 | Device and method for preparing nutrient soil by calcining high-calcium magnesium phosphorus-based solid waste coupled biomass |
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Owner name: SHIJIAZHUANG XINHUA ENERGY ENVIRONMENTAL TECHNOLOG Free format text: FORMER NAME: SHIJIAZHUANG XINHUA INDUSTRIAL FURNACE CO., LTD. |
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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: Shijiazhuang Xinhua Industrial Furnace Co., Ltd. |