CN1799725A - Flame-proof moving bed calcination device - Google Patents
Flame-proof moving bed calcination device Download PDFInfo
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Abstract
本发明隔焰移动床煅烧装置，解决了煅烧炉内局部温度过高，造成物料过烧现象；强化了煅烧物料的受热速率；同时，燃料在燃烧室燃烧时放出热量得到高效利用。它是利用燃烧时高温火焰和高温烟气间接加热了移动床煅烧炉，然后，高温烟气通向快速流化床，高温气体对预热的物料形成气固快速流态化混合加热，使得高温气体与物料产生高效快速的传热、传质；加热至所需温度的物料经过高温气固分离器进行气固分离后进入移动床煅烧炉煅烧，分离出热气体用于物料预热。热物料经过冷却卸料器后进储仓。物料在隔焰移动床煅烧炉中平均停留时间可从几分钟到数小时调节，炉温500℃－1200℃，炉膛温差±5℃内。
The flame-isolated moving bed calcination device of the present invention solves the phenomenon of over-burning of materials caused by excessive local temperature in the calcination furnace; strengthens the heating rate of the calcination materials; at the same time, the heat released by the fuel during combustion in the combustion chamber is efficiently utilized. It uses the high-temperature flame and high-temperature flue gas during combustion to indirectly heat the moving bed calciner, and then the high-temperature flue gas leads to the fast fluidized bed, and the high-temperature gas forms gas-solid rapid fluidized mixed heating on the preheated material, so that the high-temperature The gas and the material produce efficient and rapid heat and mass transfer; the material heated to the required temperature passes through the high-temperature gas-solid separator for gas-solid separation, and then enters the moving bed calciner for calcination, and the separated hot gas is used for material preheating. The hot material enters the storage bin after passing through the cooling unloader. The average residence time of materials in the flame moving bed calciner can be adjusted from a few minutes to several hours, the furnace temperature is 500°C-1200°C, and the furnace temperature difference is within ±5°C.
Description
Technical field
Flame-proof moving bed calcination device of the present invention relates to the calciner technical field.
Background technology
At present, calciner has rotary kiln, multihearth, tunnel cave etc.For powder material calcining, material conducts heat in rotary kiln, multihearth, the tunnel cave calcining furnace, mass transfer is poor, and material is heated slowly, makes the energy consumption height, and the single device production capacity is low.
Summary of the invention
The purpose of this invention is to provide a kind of flame-proof moving bed calcination device, have heat transfer, mass transfer is fast, temperature is even in the stove, the fast fluidization technical characterstic that energy consumption is low, and also it is even to have the calcination reaction time, can effectively avoid the material burning.
For achieving the above object, technical solution of the present invention is: a kind of flame-proof moving bed calcination device is provided, utilize thermal-flame and the high-temperature flue gas indirect moving bed calcining furnace burner hearth of fuel when combustion chambers burn, then, high-temperature flue gas leads to fast fluidized bed; Material carries out preheating from charging aperture through the multistage cyclone preheater, and the material of preheating enters fast fluidized bed; In fast fluidized bed, utilize the fast fluidization characteristics, high-temperature gas forms gas-solid fast fluidization Hybrid Heating to the material of preheating, makes high-temperature gas and material produce heat transfer, mass transfer efficiently; Be heated to temperature required material through the High Temperature Gas solid separator, carry out entering moving bed calcining furnace burner hearth after the gas solid separation, be incubated calcination reaction; The isolated hot gas of High Temperature Gas solid separator through the pre-thermal material of multistage cyclone preheater after, gas temperature reduces, enter the bag collector dedusting then after, by blower fan through chimney 1 emptying; The high-performance powder thermal material for preparing in burner hearth after the cooling of supercooling discharger, is discharged into warehouse by the burner hearth lower end.
Described flame-proof moving bed calcination device is combined by regenerator section, fast fluidized bed heater and muffle moving bed calcining furnace three parts; Its regenerator section comprises chimney, blower fan, bag collector, blocking valve, charging aperture, multistage cyclone preheater, High Temperature Gas solid separator and joins cold blast sliding valve; Wherein, High Temperature Gas solid separator top anti-order step is provided with the multistage cyclone preheater, the multistage cyclone preheater each other, and with the High Temperature Gas solid separator between, with the perforation that links to each other of the form of a chain of rings;
The high-temperature flue gas pipeline on secondary cyclone preheater top is provided with charging aperture, and communicates with the material pipe of the bag collector lower end of top, and this material pipe is provided with blocking valve; The high-temperature flue gas pipeline on one-level cyclone preheater top communicates with the bag collector right side, and its high-temperature flue gas pipeline is provided with joins cold blast sliding valve; The bag collector left side communicates with the inlet of blower fan, and the outlet of blower fan is connected in the end opening of chimney;
The high-temperature flue gas outlet pipe on fast fluidized bed heater top communicates with High Temperature Gas solid separator left side, the high-temperature flue gas admission line of lower end is connected with muffle moving bed calcining furnace lower side, and the material pipe of final stage cyclone preheater lower end communicates with fast fluidized bed heater lower end side;
The moving bed calcining furnace is made up of high-temperature flue gas outlet, cooling discharger, exhaust gases passes, combustion chamber, high-temperature flue, burner hearth, hearth wall, outer wall, the combustion-supporting airduct of secondary, combustor nozzle, loosening tracheae, flame partition wall, bell, loosening gas outlet and thermocouple well; Wherein, moving bed calcining furnace outer wall is a hollow cylinder, vertically be provided with, the coaxial hearth wall that is provided with in middle part in it, hearth wall is a tubular, is moving bed calcining furnace burner hearth in it, the hearth wall lateral surface vertically is provided with flame partition wall, flame partition wall across, lower end are provided with the exhaust gases passes that leads to the high-temperature flue gas outlet of perforation, and the outside is fixed in the madial wall of outer wall; By the passage that flame partition wall was separated out is high-temperature flue, in the high-temperature flue, the medial surface of outer wall is provided with the combustion chamber, a plurality of combustion chambers annular on two contours of outer wall middle inside and bottom is uniform, its outer end is provided with combustor nozzle, burner protrudes from the outer exterior wall face, and there is the combustion-supporting airduct of secondary the burner side; Outer wall, high-temperature flue and hearth wall are passed in the one loosening oblique below of tracheae, communicate with moving bed calcining furnace burner hearth; One thermocouple well level is passed outer wall, high-temperature flue and hearth wall, and its test probe places in the burner hearth;
Outer wall, hearth wall, flame partition wall are isometric, and upper and lower side is affixed by the lid sealing, and the furnace top cover centre is porose, and this hole communicates with High Temperature Gas solid separator lower end material outlet, and the hole side is provided with becomes flexible the gas outlet; Furnace bottom lid centre has and the isometrical hole of moving bed calcining furnace burner hearth, and this hole communicates with cooling discharger upper end material inlet; Moving bed calcining furnace outer wall bottom lateral surface has high-temperature flue gas outlet, and the high-temperature flue gas outlet communicates with the high-temperature flue gas admission line of fast fluidized bed heater lower end; Moving bed calcining furnace outer wall, hearth wall, flue, the geometry of burner hearth is cylindrical, square column type or abnormity;
Described flame-proof moving bed calcination device, its described fuel is combustion gas, fuel oil or coal dust.
Described flame-proof moving bed calcination device, its described multistage cyclone preheater is the Category Four cyclone preheater;
The multistage cyclone preheater each other, and with the High Temperature Gas solid separator between, linking to each other with the form of a chain of rings connects, be the Category Four cyclone preheater each other, and with the High Temperature Gas solid separator between, with the continuous perforation of the form of a chain of rings.
Described flame-proof moving bed calcination device, its described Category Four cyclone preheater each other, and and the High Temperature Gas solid separator between, connect so that the form of a chain of rings is continuous, be that High Temperature Gas solid separator top anti-order step is provided with the Category Four cyclone preheater, three grades of cyclone preheaters, secondary cyclone preheater and one-level cyclone preheater, the Category Four cyclone preheater is positioned at High Temperature Gas solid separator upper left side, its right side communicates with the high-temperature flue gas pipeline on High Temperature Gas solid separator top, three grades of cyclone preheaters are positioned at High Temperature Gas solid separator upper right side, its left side communicates with the high-temperature flue gas pipeline on Category Four cyclone preheater top, and the material pipe of lower end communicates with the high-temperature flue gas pipeline on High Temperature Gas solid separator top; Secondary cyclone preheater and one-level cyclone preheater link to each other with High Temperature Gas solid separator a chain of rings as Category Four cyclone preheater, three grades of cyclone preheaters, communicate with Category Four cyclone preheater and three grades of cyclone preheaters.
Described flame-proof moving bed calcination device, its described moving bed calcining furnace also comprises ash removing opening and blind plate, on the furnace bottom lid Zhou Yuan relative with high-temperature flue, is provided with ash removing opening in the bottom of high-temperature flue, there is blind plate the ash removing opening lower end.
Described flame-proof moving bed calcination device, its described fast fluidized bed heater, wherein, fluidization gas velocity is 1～6.0 meter per second.
Temperature is 500～1200 ℃ in the described flame-proof moving bed calcination device, its described muffle moving bed calcining furnace burner hearth, by burner automation control, regulates arbitrarily.
Described flame-proof moving bed calcination device, its described material, i.e. calcining materials aggregate, particle mean size at tens of microns to 5000 micrometer ranges.
Described flame-proof moving bed calcination device, the thermal-flame of its flame-proof moving bed calcination device inner combustion chamber burning and high-temperature flue gas indirect the moving bed calcining furnace, fully effectively utilized the fuel liberated heat, thermal efficiency height; Avoided thermal-flame directly to contact with material, overcome material be heated overheated; High-temperature flue gas enters fast fluidized bed by flue by outlet, and high-temperature gas forms gas-solid fast fluidization Hybrid Heating to the material of preheating, makes high-temperature gas and material produce heat transfer, mass transfer efficiently; Be heated to after temperature required material carries out gas solid separation through the High Temperature Gas solid separator, enter moving bed calcining furnace burner hearth calcining insulation, make in the moving bed calcining furnace burner hearth temperature evenly, stable.
This flame-proof moving bed calcination device has following main feature:
(1) moving bed calcining burner hearth adopts combustion flame and the heating of high-temperature flue gas muffle, and fire box temperature is even, has avoided the material burning.
(2) utilize the fast fluidization characteristics, high-temperature gas forms gas-solid fast fluidization Hybrid Heating to material, makes the material speed height that is heated, and material quickly heats up to and requires temperature, and temperature is even, mass transfer is fast.
(3) utilize the characteristics of the whole laminar flow of material in the moving bed, make that the calcination reaction time of material is even, calcination reaction is abundant, has guaranteed product quality.
(4) utilized the pre-thermal material of hot fume afterheat; Energy consumption is low, saves energy about 30% than general moving bed calcining furnace.
(5) the material calcining temperature is even, and the temperature difference is less than ± 5 ℃.
(6) efficient height, the separate unit production capacity is big, and annual output can reach ten tons.
Flame-proof moving bed calcination device of the present invention is applicable to material decarburization, organic matter, hydroxy water, the crystallization water, CO
2Reach calcinings such as solid phase reaction, especially narrow, reaction time uniform high activity powder material calcining for calcination temperature range.As, the activation burning of materials such as kaolin, magnesite, talcum, lime stone, aluminium hydroxide prepares the high-performance powder.
Flame-proof moving bed calcination device of the present invention not only has calcination reaction time uniform moving bed laminar flow characteristics, and have heat transfer, mass transfer is fast, temperature is even in the stove, the characteristics of the fast fluidization technology that energy consumption is low, effectively avoid simultaneously the material burning, this is narrow for calcination temperature range, the calcination reaction time is even, and it is extremely important to require active high high-performance powder calcination to prepare, and effectively utilizes the combustion chamber liberated heat.
Description of drawings
Fig. 1. flame-proof moving bed calcination device structure chart of the present invention;
Fig. 2 is the cutaway view of A-A among Fig. 1;
Fig. 3 is the cutaway view of B-B among Fig. 1.
The specific embodiment
The structure of flame-proof moving bed calcination device of the present invention, as shown in Figure 1.Flame-proof moving bed calcination device is to be combined by regenerator section, fast fluidized bed heater and muffle moving bed calcining furnace three parts.Regenerator section comprises chimney 1, blower fan 2, bag collector 3, blocking valve 4, charging aperture 5, Category Four cyclone preheater 6, High Temperature Gas solid separator 24, three grades of cyclone preheaters 25, secondary cyclone preheater 26, one-level cyclone preheaters 27 and joins cold blast sliding valve 28; Wherein, High Temperature Gas solid separator 24 tops anti-order step is provided with Category Four cyclone preheater 6, three grades of cyclone preheaters 25, secondary cyclone preheater 26 and one-level cyclone preheater 27, Category Four cyclone preheater 6 is positioned at High Temperature Gas solid separator 24 upper left sides, its right side communicates with the high-temperature flue gas pipeline on High Temperature Gas solid separator 24 tops, three grades of cyclone preheaters 25 are positioned at High Temperature Gas solid separator 24 upper right side, its left side communicates with the high-temperature flue gas pipeline on Category Four cyclone preheater 6 tops, and the material pipe of lower end communicates with the high-temperature flue gas pipeline on High Temperature Gas solid separator 24 tops; Secondary cyclone preheater 26 and one-level cyclone preheater 27 link to each other with High Temperature Gas solid separator 24 a chain of rings as Category Four cyclone preheater 6, three grades of cyclone preheaters 25, communicate with Category Four cyclone preheater 6 and three grades of cyclone preheaters 25.
The high-temperature flue gas pipeline on secondary cyclone preheater 26 tops is provided with charging aperture 5, and communicates with the material pipe of bag collector 3 lower ends of top, and this material pipe is provided with blocking valve 4.The high-temperature flue gas pipeline on one-level cyclone preheater 27 tops communicates with bag collector 3 right sides, and its high-temperature flue gas pipeline is provided with joins cold blast sliding valve 28.Bag collector 3 left sides communicate with the inlet of blower fan 2, and the outlet of blower fan 2 is connected in the end opening of chimney 1.
The high-temperature flue gas outlet pipe on fast fluidized bed heater 7 tops communicates with High Temperature Gas solid separator 24 left sides, and the high-temperature flue gas admission line of lower end is connected with muffle moving bed calcining furnace lower side.The material pipe of Category Four cyclone preheater 6 lower ends communicates with fast fluidized bed heater 7 lower end side.
The moving bed calcining furnace is made up of high-temperature flue gas outlet 8, ash removing opening 9, blind plate 10, cooling discharger 11, exhaust gases passes 12, combustion chamber 13, high-temperature flue 14, burner hearth 15, hearth wall 16, outer wall 17, the combustion-supporting airduct 18 of secondary, combustor nozzle 19, loosening tracheae 20, flame partition wall 21, bell 22, loosening gas outlet 23 and thermocouple well 29; Wherein, moving bed calcining furnace outer wall 17 is a hollow cylinder, vertically be provided with, the coaxial hearth wall 16 that is provided with in middle part in it, hearth wall 16 is cylindric, is moving bed calcining furnace burner hearth 15 in it, hearth wall 16 lateral surfaces vertically are provided with flame partition wall 21, flame partition wall 21 across, lower end are provided with the exhaust gases passes 12 that leads to high-temperature flue gas outlet 8 of perforation, and the outside is fixed in the madial wall of outer wall 17.The passage that is separated out by flame partition wall 21 is a high-temperature flue 14, in the high-temperature flue 14, the medial surface of outer wall 17 is provided with tubaeform combustion chamber 13, a plurality of combustion chambers 13 annular on two contours of outer wall 17 middle inside and bottom is uniform, its outer end is provided with combustor nozzle 19, burner 19 protrudes from outer wall 17 lateral surfaces, and there is the combustion-supporting airduct 18 of secondary burner 19 sides.Outer wall 17, high-temperature flue 14 and hearth wall 16 are passed in one loosening tracheae 20 oblique belows, communicate with moving bed calcining furnace burner hearth 15.One thermocouple well, 29 levels are passed outer wall 17, high-temperature flue 14 and hearth wall 16, and its test probe places in the burner hearth 15.
Outer wall 17, hearth wall 16, flame partition wall 21 are isometric, and upper and lower side is affixed by the lid sealing, and furnace top cover 22a centre is porose, and this hole communicates with High Temperature Gas solid separator 24 lower end material outlets, and the hole side is provided with becomes flexible gas outlet 23; There is the hole isometrical with moving bed calcining furnace burner hearth 15 in furnace bottom lid 22b centre, this hole with cool off discharger 11 upper end material inlets and communicate; On the relative Zhou Yuan of furnace bottom lid 22b and high-temperature flue 14, be provided with ash removing opening 9 in the bottom of high-temperature flue 14, there is blind plate 10 ash removing opening 9 lower ends.Moving bed calcining furnace outer wall 17 bottom lateral surfaces have high-temperature flue gas outlet 8, and high-temperature flue gas outlet 8 communicates with the high-temperature flue gas admission line of fast fluidized bed heater 7 lower ends.
The present invention's moving bed calcining furnace burner hearth 15 that has been the thermal-flame in 13 whens burning of utilizing fuel in the combustion chamber and high-temperature flue gas indirect, then, high-temperature flue gas leads to fast fluidized bed 7; Material carries out preheating from charging aperture 5 through cyclone preheater 27,26,25,6, and the material of preheating enters fast fluidized bed 7; In fast fluidized bed 7, utilize the fast fluidization characteristics, high-temperature gas forms gas-solid fast fluidization Hybrid Heating to the material of preheating, makes high-temperature gas and material produce heat transfer, mass transfer efficiently; Be heated to temperature required material through High Temperature Gas solid separator 24, carry out entering moving bed calcining furnace burner hearth 15 after the gas solid separation, be incubated calcination reaction; The isolated hot gas of High Temperature Gas solid separator 24 through cyclone preheater 6,25,26,27 pre-thermal materials after, the gas temperature reduction, enter bag collector 3 dedustings then after, by blower fan 2 through chimney 1 emptying; The high-performance powder thermal material for preparing in burner hearth 15 after 11 coolings of supercooling discharger, is discharged into warehouse by burner hearth 15 lower ends.
Fuel passes through the combustion air of burner 19 and secondary air channel 18 in combustion chamber mixed combustion, thermal-flame during burning and high-temperature flue gas are by combustion chamber 13 and flue 14, indirect muffle moving bed calcining furnace burner hearth 15, then, high-temperature flue gas leads to fast fluidized bed 7 by exhaust gases passes 12 through moving bed calcining furnace high-temperature flue gas outlet 8, high-temperature gas forms gas-solid fast fluidization Hybrid Heating to the material of preheating in fast fluidized bed 7, make high-temperature gas and material produce heat transfer, mass transfer efficiently; When extremely temperature required, after High Temperature Gas solid separator 24 gas solid separation, add thermal material and enter moving bed calcining furnace burner hearth 15, be incubated calcination reaction; High Temperature Gas solid separator 24 is isolated hot gas through cyclone preheater 6,25,26,27 pre-thermal materials.Temperature is regulated control (closed loop is controlled or manually control automatically) by burner fuel amount and air quantity in the moving bed calcining furnace burner hearth 15, and the temperature design temperature is 930 ℃ in the burner hearth 15; Bag collector 3 temperature are controlled at the temperature that requires by joining cold blast sliding valve 28, adopt closed loop to control automatically, 150 ± 10 ℃ of control temperature; When burner hearth 15 was heated to design temperature, burner hearth 15 internal upper parts, middle part, temperature of lower were in 930 ± 5 ℃, and at this moment, temperature is about 1100 ℃ in the flue 14; Coaseries kaolin powder (2 microns of particle average grain diameters) is added cyclone preheater 27 by charging aperture 5.When flame-proof moving bed calcination device reaches material balance, heat balance, temperature is 930 ℃ in the High Temperature Gas solid separator 24,780 ± 5 ℃ of Category Four cyclone preheater 6 temperature, 650 ± 5 ℃ of three grades of cyclone preheater 25 temperature, 500 ± 5 ℃ of secondary cyclone preheater 26 temperature, 270 ± 5 ℃ of one-level cyclone preheater 27 temperature, burner hearth 15 internal upper parts, middle part, temperature of lower are still in 930 ± 5 ℃.Thermal material calcination reaction time of moving bed calcining furnace by burner hearth 15 in material stock amount and the control of cooling discharger 11 discharge rates.When 930 ± 5 ℃ of calcining heats, calcination reaction are about 30 minutes the time average time, sample analysis sees Table one, and burning crystallization phenomenon does not take place powder.
Table one. the sample situation of the different calcining manners of Coaseries kaolin powder
| The calcining manners index | Burn mistake/% | Crystalline structure | Whiteness/% |
| Flame-proof moving bed calcination device | 17.43 | Amorphous state | 91.46 |
| Thermogravimetic analysis (TGA) | 17.32 | Amorphous state | - |
Claims (10)
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| CNB2004101018691A CN100368118C (en) | 2004-12-30 | 2004-12-30 | Flame moving bed calciner |
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| CNB2004101018691A CN100368118C (en) | 2004-12-30 | 2004-12-30 | Flame moving bed calciner |
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| CN1799725A true CN1799725A (en) | 2006-07-12 |
| CN100368118C CN100368118C (en) | 2008-02-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI457520B (en) * | 2012-09-19 | 2014-10-21 | Ind Tech Res Inst | Recirculated-suspension pre-calciner system and operating method thereof |
| TWI457521B (en) * | 2012-09-19 | 2014-10-21 | Ind Tech Res Inst | Suspension pre-calciner system and using method thereof |
| US9610537B2 (en) | 2013-12-11 | 2017-04-04 | Industrial Technology Research Institute | Loop tower CO2 capture system, carbonator, calciner and operating method thereof |
| CN108679602A (en) * | 2018-05-18 | 2018-10-19 | 东南大学 | Pressurized fluidized bed Secondary Air collaboration feeding equipment and method |
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| TWI484125B (en) * | 2011-12-23 | 2015-05-11 | 財團法人工業技術研究院 | Recirculating suspension calciner system and method of use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4351513A (en) * | 1981-01-29 | 1982-09-28 | Midrex Corporation | Direct reduction of iron using coke oven gas |
| US5132102A (en) * | 1989-12-21 | 1992-07-21 | Fuller Company | Method for heat treatment of fines with atmosphere control |
| JPH07206487A (en) * | 1994-01-25 | 1995-08-08 | Ishikawajima Harima Heavy Ind Co Ltd | Calciner |
| JP3305492B2 (en) * | 1994-04-26 | 2002-07-22 | 東京瓦斯株式会社 | Melting furnace apparatus for granular material and melting furnace combustion method |
| CN2405173Y (en) * | 2000-01-31 | 2000-11-08 | 煤炭科学研究总院西安分院 | Calcine furnace |
| CN1348076A (en) * | 2000-10-10 | 2002-05-08 | 张�诚 | Circulating fluidized bed calcinator with intermediate bin |
| JP3905710B2 (en) * | 2001-02-27 | 2007-04-18 | カワサキプラントシステムズ株式会社 | Method and apparatus for manufacturing ground improvement material |
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2004
- 2004-12-30 CN CNB2004101018691A patent/CN100368118C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI457520B (en) * | 2012-09-19 | 2014-10-21 | Ind Tech Res Inst | Recirculated-suspension pre-calciner system and operating method thereof |
| TWI457521B (en) * | 2012-09-19 | 2014-10-21 | Ind Tech Res Inst | Suspension pre-calciner system and using method thereof |
| US9610537B2 (en) | 2013-12-11 | 2017-04-04 | Industrial Technology Research Institute | Loop tower CO2 capture system, carbonator, calciner and operating method thereof |
| CN108679602A (en) * | 2018-05-18 | 2018-10-19 | 东南大学 | Pressurized fluidized bed Secondary Air collaboration feeding equipment and method |
| CN108679602B (en) * | 2018-05-18 | 2019-06-18 | 东南大学 | Device and method for co-feeding with secondary air in pressurized fluidized bed |
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| CN100368118C (en) | 2008-02-13 |
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