CN1081315C - fluidized bed boiler for burning multicomponent low heat value fuel and operating method thereof - Google Patents
fluidized bed boiler for burning multicomponent low heat value fuel and operating method thereof Download PDFInfo
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- CN1081315C CN1081315C CN 97103977 CN97103977A CN1081315C CN 1081315 C CN1081315 C CN 1081315C CN 97103977 CN97103977 CN 97103977 CN 97103977 A CN97103977 A CN 97103977A CN 1081315 C CN1081315 C CN 1081315C
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- combustion chamber
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- distribution plate
- bed
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- 239000000446 fuel Substances 0.000 title claims abstract description 43
- 238000011017 operating method Methods 0.000 title abstract 2
- 238000002485 combustion reaction Methods 0.000 claims abstract description 113
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000009826 distribution Methods 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 22
- 239000002245 particle Substances 0.000 claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 5
- 239000003546 flue gas Substances 0.000 claims description 33
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000003344 environmental pollutant Substances 0.000 claims description 8
- 231100000719 pollutant Toxicity 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 4
- 238000005243 fluidization Methods 0.000 claims description 4
- 241000233805 Phoenix Species 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 239000002910 solid waste Substances 0.000 claims description 2
- 239000006096 absorbing agent Substances 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 239000010813 municipal solid waste Substances 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 4
- 239000002893 slag Substances 0.000 abstract description 3
- 239000003245 coal Substances 0.000 abstract description 2
- 239000000470 constituent Substances 0.000 abstract 3
- 239000002440 industrial waste Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000013067 intermediate product Substances 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 235000019738 Limestone Nutrition 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000001458 anti-acid effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 150000002240 furans Chemical class 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The present invention relates to a fluidized bed boiler which combusts fuel with multiple constituents and low heat values and an operating method thereof. The combustion chamber of the boiler has the characteristics of a variable cross section, no heating surfaces or few heating surfaces are arranged in the combustion chamber, a horizontal or inclined movable grate is used by feeding, and fuel is heated and dried by hot air or hot smoke gas when moving toward the combustion chamber. An inclined wind distribution plate is arranged at the lower end of the grate, an overflow slag discharge device is arranged at the lower end of the wind distribution plate, and the fluidized bed boiler can sufficiently combust the fuel which has little ash, big change of particle size and unstable constituents and density and contains multiple kinds of constituents. Therefore, the fluidized bed boiler can combust some coal with low heat values, and has the advantages of high combustion efficiency, high energy recovering rate, etc. and accords with environmental protection requirements to urban solid garbage or combustible industrial waste materials.
Description
The present invention relates to a kind of fluidized-bed combustion boiler and operation method thereof, relating in particular to a kind of is the fluidized-bed combustion boiler and the operation method thereof of fuel with multicomponent, low-calorie solid combustible matter (as municipal domestic waste and other various flammable discarded objects).
Existing fluidized-bed combustion boiler, the particle diameter that generally requires fuel is in certain screening scope, and the particle diameter of circulating ash is generally also in respective range.From flowing and the angle of material circulation, the bed material granularity is less and even, can make mobilely, and organizing of burning all is easy to control.But this will certainly increase the energy consumption and the expense of preparation of fuel.Domestic fluid bed mostly adopts the bed material (as 0-10mm) of wide-size distribution slightly at present, can increase the difficulty that flows with the material circulation so again, this kind situation, then must suitably increase wind speed and air quantity so that the abundant fluidisation of the material of various particle diameters, require separator that higher separative efficiency is arranged simultaneously, to keep material balance.This is with regard to the wearing and tearing that bring an internal heating surface and separator and efficiency separator sufficiently high problem whether.
In addition, existing fluidized bed combustion equipment generally also requires fuel that the composition of enough ash contents and fuel and density relatively stable (or fixing) are arranged except the screening characteristics that requires fuel.Few for ash content, the very unsettled fuel of the composition that change of granularity is very big, density (as urban solid garbage or trade waste that some are flammable), it is difficult using existing fluidized bed combustion equipment, can't reach well to burn and requirement on environmental protection.
The purpose of this invention is to provide a kind of fluidized-bed combustion boiler and operation method thereof, this fluidized-bed combustion boiler is low for calorific value, ash content is few, particle size range alters a great deal, component density very unstable (as urban solid garbage or trade waste that some are flammable), the fuel of burning and other physics, multiple composition that chemical characteristic is different can burn fully and can reach environmental requirement.
Another object of the present invention provides a kind of fluidized-bed combustion boiler and operation method thereof, and this fluidized-bed combustion boiler can prevent the heavy wear and the high temperature corrosion of an internal heating surface effectively.
Purpose of the present invention and task are achieved by the following technical solution: it is mainly by the fluidized-bed combustion boiler body, gas-solid separating device, supply air system and energy-recuperation system are formed, described fluidized-bed combustion boiler body mainly comprises combustion chamber [8], be arranged on the cloth phoenix plate of bottom, combustion chamber, feed system and dreg removing system, gas-solid separating device is arranged on the smoke outlet of outside, combustion chamber, above-mentioned energy-recuperation system comprises the heating surface in the combustion chamber, convection current evaporating heating surface [16], convection type is economized matchmaker's device [[18], air preheater [17] and be arranged on vapor superheater [15] in the exhaust gases passes [14], it is characterized in that described combustion chamber feed system adopts the movable fire grate [2] of a level or inclination, the front end of fire grate links to each other with feed hopper [1], what link to each other with this fire grate other end is the air distribution plate [4] of an inclination, low side at air distribution plate is provided with deslagging overflow mechanism [6], in the deslagging overflow mechanism, be provided with mechanical valve [7], and in the combustion chamber, top is furnished with the secondary wind of afterburning; The cross section of described combustion chamber or area begin to be extended to the fire grate front end that moves gradually along short transverse from motion fire grate rear end, diminish gradually again along short transverse then, upwards become straight section to the overfiren air port that is arranged on combustion chamber middle part.
The arrangement of above-mentioned combustion chamber internal heating surface, the caloric receptivity that should guarantee its heating surface are the 0-10% of the total caloric receptivity of energy-recuperation system, promptly do not arrange or arrange less heating surface.Its objective is in order to maintain the relative uniformity of temperature on the whole furnace height, make the combustion chamber in, top keeps the required temperature of burning, improve the combustion intensity of whole burner hearth, guarantee that all combustibles have enough time of staying in the combustion chamber, fully to burn.
For the flue gas that makes discharge meets requirement on environmental protection, at pollutant removing device of air preheater outlet connection of fluid bed back-end ductwork.This device can remove the harmful substance in the flue gases such as HCl, SOx and NOx.
Because the air of introducing from an air distribution plate i.e. wind is the fuel completing combustion that is not enough in the combustion chamber, thus can be in the combustion chamber, top introduces secondary wind.Before this secondary wind, the mode that back wall or both walls liquidate is arranged, or is arranged in the mode of quadrangle tangential circle.
For the non-flammable thick relatively or heavy particle in the bed is moved smoothly, be provided with the air distribution plate of inclination and the air compartment that links to each other in the bottom, combustion chamber, described air distribution plate and air compartment separated into two parts in slag-draining device; The blast cap spout direction of one and the spout direction of the blast cap on another air distribution plate intersect acute angle in the combustion chamber; Blast cap is fixed at the injection direction of different air compartment parts, but can be consistent or inconsistent each other.
Above-mentioned fluidized-bed combustion boiler burning operation method comprises the steps:
(1) will from hopper, drop on the motion fire grate without sorting and broken solid waste fuel, and make its shape
Become a bed of material;
(2) bed of material is in the process of moving to the combustion chamber under the effect of motion fire grate, by from the hot-air of the air preheater of from flue gas, obtaining heat that is arranged on boiler tail or from the flue gas heating of boiler tail and dry, the temperature of hot-air or flue gas should be more than 200 ℃;
(3) be heated and dry fuel falls on the air distribution plate that is arranged on the inclination in the combustion chamber from the motion fire grate, by regulating the different blast or the air quantity of two air compartments, and utilize the arrangement of the spout of blast cap on the different air distribution plates, non-flammable big and heavy relatively particle is in time discharged by the deslagging overflow mechanism that is arranged on the air distribution plate low side;
(4) the secondary wind of again and again wind of above-mentioned fluidized-bed combustion boiler and afterburning is to use from the hot-air of air preheater as the wind of fluidisation and burning and the secondary wind of afterburning.
The hot-air of above-mentioned wind and secondary wind is from the air preheater of obtaining heat from flue gas that is arranged on boiler tail, and the temperature of its hot-air should be more than 200 ℃, so that make the full combustion of fuel of combustion chamber.
In order to reduce SOx from the flue gas that discharge the combustion chamber and the content of HCl, can be in burner hearth, the bottom sprays into some active materials such as lime stone to burner hearth, so that reduce SOx and the content of HCl in the combustor exit flue gas.
The present invention compares with existing fluid bed, has the following advantages and beneficial effect: the screening characteristics to fuel does not have specific (special) requirements on the one hand; Low for calorific value on the other hand, ash content is few, change of size is very big, the fuel of very unsettled fuel of composition, density and burning and other physics, multiple composition that chemical characteristic is different can burn fully.Therefore, this fluidized-bed combustion boiler is that a kind of fuel tolerance is very wide, efficiency of combustion height, and the fluidized-bed combustion boiler of the protection requirement that can conform well.It is some low-calorie unburnable coals of burning not only, and low calorie fuels such as burning urban solid garbage or some trade wastes.
Accompanying drawing 1 is the structural representation of fluidized-bed combustion boiler of the present invention, and parts are as follows shown in the number in the figure:
1, feeding funnel 2, motion fire grate 3, partition wall 4, inclined distributor 5, air compartment 6, deslagging overflow mechanism 7, residual cake valve 8, combustion chamber (burner hearth) 9, pollutant removing agent import 10, overfiren air port 11, furnace wall 12, gas-solid separating device 13, loopback of material device 14, exhaust gases passes 15, superheater 16, convection current evaporating heating surface 17, air preheater 18. economizers pollutant removing chambers 19. 20. dirt pockets
Describe the concrete structure that this has in detail below in conjunction with accompanying drawing, operation method and most preferred embodiment
Fluidized-bed combustion boiler of the present invention mainly comprises the fluid bed body, gas-solid separating device 12, energy recycle device and pollutant removing device 19.Above-mentioned fluidized-bed combustion boiler body mainly comprises combustion chamber 8, is arranged on the air distribution plate 4 and the air compartment 5 that links to each other with air distribution plate, motion fire grate 2, feed hopper 1 and overflow and slag device 6 of bottom, combustion chamber.Combustion chamber 8 is in abutting connection with forming by a front wall, both walls and a back wall.This combustion chamber has the variable cross-section feature, and promptly cross sectional shape or the area along the combustion chamber short transverse changes.Do not arrange or arrange less heating surface in the combustion chamber, the caloric receptivity of its heating surface should be advisable with 0-10% of the total caloric receptivity of energy-recuperation system.The bottom, combustion chamber is provided with the movable fire grate 2 of a level or inclination, and what link to each other with fire grate is the air distribution plate 4 and the air compartment 5 that tilt, and refractory masses and blast cap are laid in the surface of inclined distributor 4.Each separated into two parts of air distribution plate and air compartment, the spout direction of the blast cap on the one air distribution plate and the blast cap spout direction on another air distribution plate intersect acute angle in burner hearth, blast cap is fixed at the injection direction of different air compartment parts, but can be consistent or inconsistent each other.Low side at air distribution plate is provided with a deslagging overflow mechanism 6, is provided with mechanical valve 7 in the deslagging overflow mechanism, in order to the control bed drain purge.
The smoke outlet that is arranged on the outside, combustion chamber from device 12 is sent out in gas-solid, in order to the solid particle that separates and loopback is taken out of with flue gas from the combustion chamber.
Energy recycle device is the layout of heating surface, comprises the heating surface in the combustion chamber, convection current evaporating heating surface 16, convection type economizer 18 and air preheater 17 and be arranged on steam superheater 15 in the exhaust gases passes 14.Can not arrange or arrange less heating surface in the combustion chamber, its caloric receptivity of arranging heating surface should be advisable with the 0-10% of the total caloric receptivity of energy-recuperation system.Do not arrange heating surface in the gas-solid separating device.
In the above-mentioned combustion chamber, top is furnished with the secondary wind 10 of afterburning, before this secondary wind, anti-wall or both sides increase the mode that liquidates to be arranged, or arranges in the mode of quadrangle tangential circle.
The front wall of combustion chamber, both walls and Hou Qiang, and Fire and abrasion resistant material is built by laying bricks or stones and is formed, and rivet into furnace wall 11 with outer metal plates by means of the bigger bitch structure of density, the furnace wall on top adopts the material of fire-resistant antiacid corrosion.
For the flue gas that makes discharge meets environmental protection requirement, the outlet of air preheater 17 is provided with a pollutant and deviates from chamber 19 in back-end ductwork, and this device can remove HCI, SO
XAnd NO
XDeng the harmful substance in the flue gas.
Fluidized-bed combustion boiler combustion process of the present invention and running status are as follows: with many compositions, low-calorie fuel, drop to the high-end of motion fire grate 2 as original municipal solid wastes from hopper 1 without sorting and break process, fuel forms a bed of material on the surface of fire grate, and the bed of material is in motion in combustion chamber 8 under the fire grate effect.The process that fuel moves in from hopper 1 to the combustion chamber, be subjected to radiation, the convection heat transfer' heat-transfer by convection effect of the gas-solid two-phase medium of high temperature (800～1000 ℃) in the burner hearth on the one hand, and have the hot solid particle of part by impelling to the fuel bed upper surface; The fuel bed heat flow medium that is subjected to flowing into from fire grate below is (more than 200 ℃ on the other hand, as hot blast or hot flue gas) loosening and heat effect, therefore fuel just is preheated to the process of combustion chamber internal motion and dry from hopper, and with the partial combustion process on surface.
Fuel is through after preheating and the drying, above the low side of fire grate 2 is crossed the air distribution plate 4 that partition wall 3 slides to the bottom, combustion chamber, in bed with the bed of hot and fluidisation in material mix so that fire burns.Fuel is in fluidized bed combustion Indoor Combustion and process of flowing, similar substantially to the fluidized-bed combustion boiler of fire coal, but it is variant slightly, on the one hand, some natural or artificial organic matter fuel combustion processes are very rapid, and almost do not have ash content, so fuel from fire grate is enterprising go into the fluidized bed combustion chamber after volume reduce rapidly; Simultaneously in the combustion chamber, the bottom is that the release share of the emulsion zone of fluidized bed combustion chamber 8 and transition region internal combustion heat is bigger, this part heat is because the present invention and common coal-fired fluidized bed difference on heating surface is arranged, can't be in combustion chamber 8, the bottom absorbed by heating surface, with main by the H in the flue gas
2O, CO
2Take away etc. gas componant and particle that thermal capacitance is bigger.Some heat will be used to heating simultaneously, the dry fuel that newly advances.On the other hand and since multicomponent fuel in often contain artificial macromolecular compound, these materials in the combustion chamber, in the oxygen debt environment in bottom fully after-flame become CO
2, H
2O etc., but some organic intermediate products and CO etc. have been generated, it is the material that environment is had pollution that some organic intermediate products such as furans are wherein arranged, must fully burn and to discharge, therefore in the combustion chamber, top need spray into hot-air in order to afterburning, makes the fully reaction before the combustion chamber 8 of leaving of CO in the flue gas and organic intermediate product.The hot-air of this part afterburning is that secondary wind is sprayed into by spout 10, and this secondary wind requires temperature more than 200 ℃.
Fluidized-bed combustion boiler is only arranged in the combustion chamber and seldom even is not arranged heating surface, therefore can maintain the relative uniformity of temperature on the whole furnace height, make combustion chamber 8 in, top still maintains the required temperature of burning, like this can prolong smoke in the time of staying of combustion zone, the various flammable matter in flue gas is fully burnt under secondary wind cooperates, also make some particles in burner hearth simultaneously, top burns away, thereby improves the combustion intensity of whole burner hearth.
The solid particle that flow out with flue gas at 8 top from the combustion chamber (wherein also having some to contain combustible component), under the effect of gas-solid separating device 12, most of solid particle enters loop back device 13 and is sent to combustion chamber 8.When being entered combustion chamber 8, at first drop on the fuel upper surface on the movable fire grate 2, and enter the fluid bed burner hearth, thereby quicken preheating of fuel, dry run with fuel by the solid particle of loopback.Flue gas from gas-solid separating device 12 is discharged enters exhaust gases passes 14.In exhaust gases passes 14, be furnished with anti-HCI, H
2The metal heating surface of high temperature such as S corrosion is as superheater 15.Flue gas is through the evaporating heating surface 16 of flowing through behind the superheater 15, and this heating surface will mainly be obtained heat with convection type from flue gas, and the gained heat is vaporized into steam to the working medium in the heating surface tube.When flue gas left evaporating heating surface 16, temperature was greatly about 400～500 ℃.Flue gas will enter the vertical flue of afterbody after leaving heating surface 16, wherein be furnished with two-stage air preheater 17 and one-level economizer 18 air preheaters 17 and be more than the air heat to 200 under the environment temperature (as 25 ℃) ℃, be used in the fluidized bed combustion chamber 8 material and as the wind of burning and the secondary wind of afterburning.Consider the cold end corrosion of the convection heating surface in the flue gas, the first order of air preheater 17 (in the flue gas low-temperature section) will adopt the better simply detachable block of structure, so that in time change.Economizer 18 uses the material (as cast iron) of anti-flue gas low-temperature corrosion to make.
The flue gas that comes out from the first order of air preheater 17 enters pollutant removing chamber 19, in pollutant removing chamber 19, and the HCI in the flue gas, NO
XAnd SO
XBe absorbed agent and effectively absorb, thereby make harmful components content in the flue gas reach the standard of environmental protection.After this flue gas enters deduster 20, removes solid particle wherein, thereby makes dust content in the flue gas reach the standard of environmental protection requirement.
The bottom of combustion chamber 8 is inclined distributors 4, and the air compartment 5 under this air distribution plate is divided into two air compartments, but the blast of each air compartment, air quantity independent regulation.Blast cap on the air distribution plate 4 is directed, its direction intersects acute angle in combustion chamber 8, can guarantee that so a non-flammable big relatively or heavy material is to overflow and slag device 6 motion and gather, residual cake valve 7 in this device can be controlled effective discharging of non-flammable relative bulky grain and general lime-ash, thereby keeps the optimal level of material in the combustion chamber 8.
In order to reduce HCI, SO in the combustor exit flue gas
XRelative amount, in the combustion chamber, the bottom is provided with dirty combustion thing and removes agent spout 9, can spray into some active materials as lime stone etc. in burner hearth, makes it in burner hearth and HCI, SO
XReaction generates corresponding salt.
Claims (5)
1, a kind of fluidized-bed combustion boiler of burning multicomponent low heat value fuel, it is mainly by the fluidized-bed combustion boiler body, gas-solid separating device, supply air system and energy-recuperation system are formed, described fluidized-bed combustion boiler body mainly comprises combustion chamber [8], be arranged on the cloth phoenix plate of bottom, combustion chamber, feed system and dreg removing system, gas-solid separating device are arranged on the smoke outlet of outside, combustion chamber; Above-mentioned energy-recuperation system comprises the heating surface in the combustion chamber, convection current evaporating heating surface [16], convection type is economized matchmaker's device [18], air preheater [17] and be arranged on vapor superheater [15] in the exhaust gases passes [14], it is characterized in that described combustion chamber feed system adopts the movable fire grate [2] of a level or inclination, the front end of fire grate links to each other with feed hopper [1], what link to each other with this fire grate other end is the air distribution plate [4] of an inclination, low side at air distribution plate is provided with deslagging overflow mechanism [6], in the deslagging overflow mechanism, be provided with mechanical valve [7], and in the combustion chamber, top is furnished with the secondary wind of afterburning; The cross section of described combustion chamber or area begin to be extended to the fire grate front end that moves gradually along short transverse from motion fire grate rear end, diminish gradually again along short transverse then, upwards become straight section to the overfiren air port that is arranged on combustion chamber middle part.
2, according to the fluidized-bed combustion boiler of the described a kind of burning multicomponent low heat value fuel of claim 1, it is characterized in that the air distribution plate of described inclination is made up of two continuous air distribution plates, each air distribution plate two air compartments below it respectively links to each other; The spout direction of the blast cap on the one air distribution plate and the spout direction of the blast cap on another air distribution plate intersect acute angle in the combustion chamber.
3, according to the fluidized-bed combustion boiler of claim 1 or 2 described a kind of burning multicomponent low heat value fuels, the caloric receptivity that it is characterized in that the heating surface of layout in the combustion chamber is 0～10% of the total caloric receptivity of energy absorber system.
4,, it is characterized in that in the outlet of the air preheater of back-end ductwork pollutants such as HCL, a SOx and NOx being set deviates from device [19] according to the fluidized-bed combustion boiler of the described a kind of burning multicomponent low heat value fuel of claim 1.
5. adopt fluidized-bed combustion boiler according to claim 1 a kind of operation method, this method may further comprise the steps:
(1) will from hopper, drop on the motion fire grate without sorting and broken solid waste fuel, and make it form a bed of material;
(2) bed of material is in the process of moving to the combustion chamber under the effect of motion fire grate, by from the hot-air of the air preheater of from flue gas, obtaining heat that is arranged on boiler tail or from the flue gas heating of boiler tail and dry, the temperature of hot-air or flue gas should be more than 200 ℃;
(3) be heated and dry fuel falls on the air distribution plate that is arranged on the inclination in the combustion chamber from the motion fire grate, by regulating the different blast or the air quantity of two air compartments, and utilize the arrangement of the spout of blast cap on the different air distribution plates, non-flammable big and heavy relatively particle is in time discharged by the deslagging overflow mechanism that is arranged on the air distribution plate low side;
(4) the secondary wind of above-mentioned fluidized-bed combustion boiler wind and afterburning is to use from the hot-air of air preheater as the wind of fluidisation and burning and the secondary wind of afterburning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97103977 CN1081315C (en) | 1997-04-11 | 1997-04-11 | fluidized bed boiler for burning multicomponent low heat value fuel and operating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97103977 CN1081315C (en) | 1997-04-11 | 1997-04-11 | fluidized bed boiler for burning multicomponent low heat value fuel and operating method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1164628A CN1164628A (en) | 1997-11-12 |
| CN1081315C true CN1081315C (en) | 2002-03-20 |
Family
ID=5167028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97103977 Expired - Fee Related CN1081315C (en) | 1997-04-11 | 1997-04-11 | fluidized bed boiler for burning multicomponent low heat value fuel and operating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1081315C (en) |
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-
1997
- 1997-04-11 CN CN 97103977 patent/CN1081315C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102278762A (en) * | 2011-08-30 | 2011-12-14 | 李登平 | Circulating fluidized incinerator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1164628A (en) | 1997-11-12 |
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