CN105627322A - Mechanical grate type garbage gasification incineration system and disposal method thereof - Google Patents

Mechanical grate type garbage gasification incineration system and disposal method thereof Download PDF

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Publication number
CN105627322A
CN105627322A CN201511008654.XA CN201511008654A CN105627322A CN 105627322 A CN105627322 A CN 105627322A CN 201511008654 A CN201511008654 A CN 201511008654A CN 105627322 A CN105627322 A CN 105627322A
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China
Prior art keywords
incinerator
vapourizing furnace
furnace
garbage
rubbish
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CN201511008654.XA
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Chinese (zh)
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CN105627322B (en
Inventor
林顺洪
严欣平
肖大志
周雄
李长江
丁又青
徐�明
柏继松
季炫宇
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Chongqing University of Science and Technology
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Chongqing University of Science and Technology
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Priority to CN201511008654.XA priority Critical patent/CN105627322B/en
Publication of CN105627322A publication Critical patent/CN105627322A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/027Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/08Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
    • F23G5/14Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories
    • F23G5/442Waste feed arrangements
    • F23G5/444Waste feed arrangements for solid waste
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/02Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/40Gasification

Abstract

The invention discloses a mechanical grate type garbage gasification incineration system. The mechanical grate type garbage gasification incineration system comprises a gasification incinerator and a circulation air supply system of the gasification incinerator. The gasification incinerator comprises a feeding bin, a gasification furnace and a burn-off furnace. A stockpiling sealing section is arranged between the feeding bin and the gasification furnace. A residue pushing device is arranged between the gasification furnace and the burn-off furnace. The upper end of the gasification furnace is arched and provided with a smoke outlet, and the upper end of the burn-off furnace is arched and provided with a smoke outlet. The garbage disposal method includes the steps that firstly, furnace starting and furnace baking are conducted; secondly, garbage is burnt in a hearth of the gasification furnace; thirdly, continuous gasification incineration disposal of garbage is conducted; and fourthly, after garbage and garbage residues are burned off, the mechanical grate type garbage gasification incineration system is shut down. The mechanical grate type garbage gasification incineration system is used for disposing garbage so that large-scale continuous gasification incineration disposal of garbage can be achieved, the garbage disposing amount is larger, the garbage conveying capability is higher, the heat recovery rate is high, and the emission of pollutants can be effectively reduced.

Description

Stoker fired grate formula refuse gasification incineration system and treatment process thereof
Technical field
The invention belongs to solid waste incineration processing technology field, particularly relate to stoker fired grate formula refuse gasification incineration system and treatment process thereof.
Background technology
Existing technology of garbage disposal mainly contains burning, sanitary landfill, compost, waste recovery etc. The advantages such as in refuse treatment routine techniques, it is obvious that burning disposal has reduced training, and thoroughly innoxious, occupation of land amount is little, and waste heat energy is utilized, and secondary pollution is few, meet the strategic requirement of China's Sustainable development. But along with domestic and international improving constantly environmental requirement, how to strengthen the control to secondary pollution particularly important. Therefore, refuse pyrolysis gasification burning technology is shifted onto on the road of industrial applications gradually, what particularly mainly adopt now for domestic rubbish is all kinds of incineration technologies, and the technical renovation bringing domestic refuse treatment industry is regenerated by the industrialization widely of gasification burning technology.
For many years, China, to the scientific research of the gasification burning technology such as biomass, rubbish, is in progress a lot of, and the fundamental research in laboratory is a lot, also has applied research, such as the destructive gasifying of: rotary kiln type, vertical and fluidized bed type or temperature gasification and high fusion technology etc. But technology popularization application is upper or there is a definite limitation, and raw material type, garbage treatment quantity, secondary pollution control and economic benefit etc. are principal elements.
In existing burning process and equipment, fire grate type incinerator is various informative, its application accounts for more than the 80% of the whole world waste incineration total market size, wherein has and adopts mechanical type backstepping fire grate, forwards fire grate or combined fire grate in body of heater, also has and adopts the fire grate such as chain-plate type and drum-type.
In sum, typical incinerator, respectively has himself advantage, but needs the problem and shortage of solution in China's practical application:
1., for characteristics such as China's domestic refuse water content height, complicated components, the technology of moving hearth uses, and needs emphasis to consider the transport capacity of rubbish.
2. being on the increase along with refuse production, sanitary fill such as mountain, garbage treatment quantity must be effectively improved, could meeting the market requirement.
3., in the face of strict pollutant emission requirement, secondary pollution control is the key problem needing in technology to solve.
4., in order to effectively increase economic efficiency, in rubbish heat treatment process, the organic efficiency of heat needs to improve. Existing rubbish heat treatment technics usually adopts boiler to produce steam and shifts steam turbine power generation onto, and whole transition heat efficiency losses is relatively big, processes identical quantity of refuse, relatively reduces thermal losses and improves heat exchanger effectiveness and just can improve thermo-efficiency.
Existing incinerator is such as following two patents of invention: open question in multiple row sectional drive combined type domestic garbage incinerator (ZL200710092508.9) and two-stage garbage incinerator (ZL201010268376.2): rubbish heat treatment mode is relatively backward, just drying-burn-burn, the process of solid combustion release of heat; In stove, thermal chemical reaction is based on oxidizing reaction, and reduction reaction is assisted, and easily produces secondary pollutant; Rubbish, when stove combustion, crosses oxygen coefficient big, and First air, secondary air are big for entering amount, and in flue gas, dust content is higher, and heat reclaiming system and smoke processing system impact is bigger, it is easy to long-pending ash, and exhaust gas volumn is relatively big, reduces thermal conversion efficiency; The vapourizing furnace arranged separately and incinerator, can only gradation treating refuse, the continuous gasification burning process of large-scale rubbish cannot be realized, garbage treatment quantity is less.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, a kind of stoker fired grate formula refuse gasification incineration system and treatment process thereof are provided, use the grate-type refuse gasification incineration system treating refuse of this machinery, rubbish transport capacity is stronger, garbage treatment quantity is bigger, can reducing thermal losses and improve heat exchanger effectiveness, the organic efficiency of heat is higher, and can decreasing pollution thing quantity discharged effectively.
The object of the present invention is achieved like this:
A kind of stoker fired grate formula refuse gasification incineration system, comprise incinerator, described incinerator comprises stove frame, and the feed hopper arranged successively along feedstock direction on stove frame, vapourizing furnace and incinerator, the rear of vapourizing furnace is the cinder notch that falls of vapourizing furnace, incinerator is positioned at vapourizing furnace and falls the front lower place of cinder notch, the rear of incinerator is the slag notch of incinerator, described stove frame is provided with garbage pusher device, described garbage pusher device is positioned at the lower section of feed hopper, for the rubbish in feed hopper is pushed away in vapourizing furnace, the lower section of vapourizing furnace moving hearth and the lower section of incinerator moving hearth are respectively equipped with at least one air compartment independently arranged, described feed hopper, windrow seal section it is provided with between vapourizing furnace, stove frame part between described vapourizing furnace and incinerator leaves transition fall slag section, the described transition slag section that falls is provided with residue stock pusher, for the rubbish fallen in vapourizing furnace residue is pushed away in incinerator,
Described vapourizing furnace, incinerator comprise furnace shell, moving hearth respectively, the forward and backward side of described vapourizing furnace respectively by windrow seal section, transition fall slag section sealing, described transition fall slag section isolation vapourizing furnace, incinerator, make vapourizing furnace, incinerator separate;
Described vapourizing furnace, incinerator are respectively in the shape that arches upward, the front arch of described vapourizing furnace, rear arch arrange two times respectively for air ports, the vault of described vapourizing furnace arranges the first exhanst gas outlet, the vault of described incinerator arranges the 2nd exhanst gas outlet, and described vapourizing furnace, incinerator are respectively equipped with igniting combustion supporting hole;
Also comprise circulation air feed system, described circulation air feed system comprises cleaning apparatus, first blower fan, 2nd blower fan, the air inlet end of described cleaning apparatus is connected with the 2nd exhanst gas outlet by pipeline, the outlet side of described cleaning apparatus is connected with the air inlet end of the first blower fan by pipeline, the outlet side of described first blower fan connects the house steward of the first manifold, the arm of described first manifold respectively with each air compartment of the lower section of vapourizing furnace moving hearth and vapourizing furnace before arch, on rear arch two times are connected for air port, each arm of described first manifold arranges the first variable valve respectively, the inlet mouth of described 2nd blower fan and atmosphere, the air outlet of described 2nd blower fan connects the house steward of the 2nd manifold, the arm of described 2nd manifold respectively with incinerator moving hearth below each air compartment and the air inlet end of cleaning apparatus, outlet side is connected, each arm of described 2nd manifold arranges the 2nd variable valve respectively.
In order to reduce thermal losses and improve heat exchanger effectiveness, make the organic efficiency of heat higher, preferably, also comprise the cyclone combustion chamber for secondary combustion, the upper end of described cyclone combustion chamber is provided with combustion chamber ignition combustion-supporting hole, the lower end of cyclone combustion chamber is provided with the taper slag notch that radius from top to bottom diminishes, the top of described cyclone combustion chamber circumferential wall arranges smoke inlet, the bottom of described cyclone combustion chamber circumferential wall arranges the 3rd exhanst gas outlet, the circumferential wall of described cyclone combustion chamber is evenly provided with some combustion-supporting wind for air port, each combustion-supporting wind is all positioned at smoke inlet for air port, between 3rd exhanst gas outlet.
High-temperature flue gas in order to produce after making burning is easily discharged, and is beneficial to the installation of pipeline, it may be preferred that described smoke inlet, the 3rd exhanst gas outlet are positioned at the opposition side of cyclone combustion chamber circumferential wall; Described 3rd exhanst gas outlet is along cyclone combustion chamber circumferential wall radial direction or tangentially arranges.
For the wind utilizing the 2nd blower fan drum to go out more fully, and it is beneficial to the air output of meticulousr adjustment cyclone combustion chamber each several part, preferably, also comprise the 3rd manifold, the house steward of described 3rd manifold is connected with the air outlet of the 2nd blower fan, each arm of described 3rd manifold is connected for air port with each combustion-supporting wind respectively, and each arm of the 3rd manifold arranges the 3rd variable valve respectively.
In order to the installation space better adapted in factory, the front arch of described vapourizing furnace is flat construction, or, the front arch of vapourizing furnace is that rear end is inclined upwardly structure.
In order to strengthen sealing effect, prevent flying dust from overflowing, decreasing pollution thing quantity discharged, preferably, described incinerator is provided with cinder notch, and the slag notch of described incinerator is positioned at incinerator and falls the underface of cinder notch, and the described incinerator cinder notch that falls is connected with the slag notch of cleaning apparatus by pipeline.
In order to effectively the high-temperature flue gas that incinerator is discharged be carried out dedusting, it may be preferred that described cleaning apparatus is cyclonic separator or hot precipitator; Described first blower fan is high-temperature blower, is beneficial to and works in high temperature environments, and described 2nd blower fan is gas blower.
In order to prevent altering wind between vapourizing furnace, incinerator, it may be preferred that described transition falls and is provided with isolating door to be opened/closed in slag section, described isolating door is used for cutting off vapourizing furnace, incinerator. The furnace lifting initial stage or need control vapourizing furnace and incinerator between alter wind time, close isolating door, after the slag section that falls stacks the formation windrow sealing of a certain amount of residue, it is possible to keep isolating door to open, the residue stock pusher arranged with lower section is coordinated to use, to realize the continuous gasification burning process of rubbish.
A waste disposal method for stoker fired grate formula refuse gasification incineration system, the method carries out according to the following steps:
Steps A, close the gate of stoker fired grate formula refuse gasification incinerator and atmospheric vent, start machinery grate-type refuse gasification incinerator, garbage raw material is dropped into feed hopper, the reciprocal repeatedly pusher of garbage pusher device, the garbage raw material fallen from feed hopper is pushed away into feed hopper, windrow seal section between vapourizing furnace, windrow seal section is made to form windrow sealed state, unnecessary rubbish falls into the moving hearth of vapourizing furnace, the moving hearth work of vapourizing furnace, rubbish is conveyed into transition fall slag section, the reciprocal repeatedly pusher of residue stock pusher, rubbish transition fallen in slag section pushes away in incinerator, the moving hearth work conveying garbage of incinerator, until rubbish is at vapourizing furnace, the moving hearth of incinerator is accumulated to required thickness, stop throwing material to feed hopper, the moving hearth stopping work of vapourizing furnace and incinerator, then, with pilot burner by the igniting combustion supporting hole of vapourizing furnace and incinerator respectively burner hearth with vapourizing furnace and incinerator communicate, under the effect of pilot burner, vapourizing furnace and incinerator are carried out furnace lifting, baker, treat that this process stabilization completes, vapourizing furnace and incinerator burner hearth is made to reach preset temperature 600-700 DEG C,
Step B, startup regulate circulation air feed system, regulate the processing parameter of vapourizing furnace, incinerator and circulation air feed system, material is thrown to feed hopper, the moving hearth work conveying garbage of vapourizing furnace, rubbish starts to burn in the burner hearth of vapourizing furnace, rubbish residue is piled up form windrow sealing at the transition slag section place that falls, and makes the burner hearth combustion state temperature of vapourizing furnace be stabilized to more than 850 DEG C, and the work of the moving hearth of incinerator exports the rubbish residue after burning;
Each processing parameter of step C, adjustment vapourizing furnace, incinerator and circulation air feed system, rubbish is gasified by vapourizing furnace gradually, make vapourizing furnace stablize the synthetic gas producing 10%-20%, make incinerator state of combustion temperature-stable to more than 850 DEG C, it is achieved the continuous gasification burning process of rubbish;
Step D, need to overhaul or during blowing out, stop throwing material, regulate the processing parameter of vapourizing furnace, incinerator and circulation air feed system, make vapourizing furnace return to state of combustion gradually, after rubbish and rubbish residue burn, close stoker fired grate formula refuse gasification incinerator and circulation air feed system.
In order to cyclone combustion chamber and incinerator and circulation air feed system are comprehensively controlled, it may be preferred that in step C, each processing parameter of cyclone combustion chamber need to be regulated, make cyclone combustion chamber the 3rd flue gas exit temperature be stabilized to more than 850 DEG C simultaneously; In step D, each processing parameter of cyclone combustion chamber need to be regulated simultaneously, make vapourizing furnace return to state of combustion gradually.
Owing to have employed technique scheme, the present invention has following useful effect:
Gas blower blasts air and provides First air for incinerator and for cyclonic separator, high-temperature blower offer temperature adjustment are for wind, regulate wind supply quantity by the 2nd variable valve on corresponding pipeline, incinerator residue is fully burnt; Then, high-temperature blower extracts the flue gas of incinerator, after temperature adjustment and cyclone collection flying dust, form First air and the secondary air of the flue gas supply vapourizing furnace of certain pressure, regulate wind supply quantity by the first variable valve on corresponding pipeline, make rubbish in vapourizing furnace produce gasification, flue gas containing a certain amount of synthetic gas, discharging from the first exhanst gas outlet, enter cyclone combustion chamber processing links, cyclone combustion chamber provides high-temperature flue gas. Present inventive concept is novel, garbage treatment quantity is big, what the rubbish bed of material experienced dry, gasification and residue on stoker fired grate burns the stage, adapt to the characteristics such as China's domestic refuse water content height, complicated component, improve the energy conversion efficiency in garbage processing procedure and reduce pollutant discharge amount in flue gas, effectively prevent secondary pollution, and the continuous gasification burning process of large-scale rubbish can be realized, ensure that refuse gasification burns effect and lime-ash clinker ignition loss, relatively reduce thermal losses and improve heat exchanger effectiveness, it is to increase thermo-efficiency.
Vapourizing furnace, incinerator are provided separately, the vault of vapourizing furnace arranges the first exhanst gas outlet, the vault of incinerator arranges the 2nd exhanst gas outlet, it is beneficial to the different smoke treatment respectively according to flue gas quality, be conducive to flue gas ash removal simultaneously, can providing the flue gas of more high-quality, make the utilization ratio of flue gas higher, the waste residue of discharge is less.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the structural representation of cyclone combustion chamber in Fig. 1.
Reference numeral
1 is incinerator, and 101 is stove frame, and 102 is feed hopper, 103 is vapourizing furnace, and 104 is incinerator, and 105 is siege, 106 is garbage pusher device, and 107 is an air compartment, and 108 is windrow seal section, 109 fall slag section for transition, and 110 is residue stock pusher, and 111 is isolating door, 112 is the first exhanst gas outlet, and 113 is the 2nd exhanst gas outlet, and 114 is igniting combustion supporting hole, 115 is supply air port two times, and 116 is slag notch, and 117 is the cinder notch that falls;
2 is circulation air feed system, and 201 is cleaning apparatus, and 202 is the first blower fan, and 203 is the 2nd blower fan, and 204 is the first manifold, and 205 is the 2nd manifold, and 206 is the 3rd manifold, and 207 is the first variable valve, and 208 is the 2nd variable valve, and 209 is the 3rd variable valve;
3 is cyclone combustion chamber, and 301 is combustion chamber ignition combustion-supporting hole, and 302 is taper slag notch, and 303 is smoke inlet, and 304 is the 3rd exhanst gas outlet, and 305 is that combustion-supporting wind is for air port.
Embodiment
See Fig. 1, for a kind of preferred embodiment of stoker fired grate formula refuse gasification incineration system, comprise incinerator 1, described incinerator 1 comprises stove frame 101, and the feed hopper 102, vapourizing furnace 103 and the incinerator 104 that arrange successively along feedstock direction on stove frame 101, the rear of incinerator 104 is the slag notch of incinerator 104, vapourizing furnace 103 is gasifying to rubbish mainly containing charcoal part, and discharge flammable gasification flue gas and rubbish residue, incinerator 104 mainly carries out the burn processing of carbon residue, and discharges innoxious lime-ash. The siege 105 of vapourizing furnace 103 and incinerator 104 all adopts the stoker fired grate formula moving hearth 105 of segmentation independent drive, the fire grate of stoker fired grate formula moving hearth 105 is overlapping with before and after fixed grate plate by moving grate plate, collect alternately, adjacent many groups moving grate plate is connected by pull bar, adopts a set of drive unit to drive. Stoker fired grate formula moving hearth 105 is as the carrier of conveying garbage, and its enforcement mode can be each type moving hearth 105, such as chain-plate type, drum-type, multi-stage type fire grate system etc.
Described stove frame 101 is provided with garbage pusher device 106, described garbage pusher device 106 is positioned at the lower section of feed hopper 102, for the rubbish in feed hopper 102 is pushed away in vapourizing furnace 103, the lower section of vapourizing furnace 103 moving hearth 105 and the lower section of incinerator 104 moving hearth 105 are respectively equipped with at least one air compartment 107 independently arranged, in the present embodiment, the fire grate corresponding with an air compartment 107 of vapourizing furnace 103 forebody, drive unit, as the dryer section of vapourizing furnace 103 siege 105, the fire grate that an air compartment 107 latter half of with vapourizing furnace 103 is corresponding, drive unit is as the gasification section of vapourizing furnace 103 siege 105. the dryer section of vapourizing furnace 103 siege 105, gasification section can adopt a 1-2 independent air compartment 107 for wind respectively, it is also possible to adopt a 3-4 independent air compartment 107 for wind respectively. certainly, fire grate, drive unit and air compartment 107 also can not corresponding setting, better regulate the bed of material on moving hearth 105 move and join wind relation. incinerator 104 can adopt a 1-4 independent air compartment 107 for wind, burns rear lime-ash and gets rid of from slag notch, enters next step treatment process.
It is provided with windrow seal section 108 between described feed hopper 102, vapourizing furnace 103, garbage pusher device 106 work enters position and is in windrow seal section 108, garbage raw material is put into from feed hopper 102 and is fallen, garbage pusher device 106 retreats, advancing, back and forth repeatedly pusher forms windrow at windrow seal section 108 again, makes vapourizing furnace 103 entrance be in windrow sealed state, strengthen vapourizing furnace 103 and seal effect, solve garbage pusher device 106 and feed hopper 102 and easily leak gas problem. When needing completely clear stove to dispose all rubbish, garbage pusher device 106 forward impelling half stroke again, pushes away in vapourizing furnace 103 completely by rubbish, makes vapourizing furnace 103 entrance lose windrow sealing effect. Stove frame 101 part between described vapourizing furnace 103 and incinerator 104 leaves transition fall slag section 109, the described transition slag section 109 that falls is provided with residue stock pusher 110, for the rubbish fallen in vapourizing furnace 103 residue is pushed away in incinerator 104, transition fall slag section 109 pile up rubbish residue time can be in windrow sealed state, strengthen vapourizing furnace 103 and seal effect, solve the problem of wind of going here and there between vapourizing furnace 103, incinerator 104. In the present embodiment, described transition falls and is provided with isolating door 111 to be opened/closed in slag section 109, and described isolating door 111 is for cutting off vapourizing furnace 103, incinerator 104. The furnace lifting initial stage or need control vapourizing furnace 103 and incinerator between alter wind time, close isolating door 111, after the slag section that falls stacks the formation windrow sealing of a certain amount of residue, isolating door 111 can be kept to open, the residue stock pusher 110 arranged with lower section is coordinated to use, to realize the continuous gasification burning process of rubbish.
The upper end of described vapourizing furnace 103, the upper end of incinerator 104 are respectively in the shape that arches upward, and the front arch of described vapourizing furnace 103 is flat construction, or, the front arch of vapourizing furnace 103 is that rear end is inclined upwardly structure. The vault of described vapourizing furnace 103 arranges the first exhanst gas outlet 112, and the vault of described incinerator 104 arranges the 2nd exhanst gas outlet 113, and the arching upward of described vapourizing furnace 103 upper end, the arching upward of incinerator 104 upper end are respectively equipped with igniting combustion supporting hole 114. Gasification flue gas is got rid of from the first exhanst gas outlet 112, the 2nd exhanst gas outlet 113, and vapourizing furnace 103 furnace cavity, compared with traditional incinerator, reduces relatively; Forward and backward arch and moving hearth 105 relative position diminish, and decrease the space that incinerator takies, and are also easier to insulation, decrease the amount of leakage of heat, be conducive to rubbish fully to gasify. The front arch of described vapourizing furnace 103, rear arch arrange two times respectively for air ports 115.
Also comprise circulation air feed system 2, described circulation air feed system 2 comprises cleaning apparatus 201, first blower fan 202, the 2nd blower fan 203, described cleaning apparatus 201 is cyclonic separator or hot precipitator, and in the present embodiment, described cleaning apparatus 201 is cyclonic separator. described first blower fan 202 is high-temperature blower, and described 2nd blower fan 203 is gas blower. the air inlet end of described cleaning apparatus 201 is connected with the 2nd exhanst gas outlet 113 by pipeline, the outlet side of described cleaning apparatus 201 is connected by the air inlet end of pipeline with the first blower fan 202, the outlet side of described first blower fan 202 connects the house steward of the first manifold 204, the arm of described first manifold 204 respectively with each air compartment 107 of the lower section of vapourizing furnace 103 moving hearth 105 and vapourizing furnace 103 before arch, on rear arch two times are connected for air port 115, each arm of described first manifold 204 arranges the first variable valve 207 respectively, the flue gas that vapourizing furnace 103 First air is high-temperature blower extraction incinerator 104 produces in the air compartment 107 that certain pressure blasts correspondence below vapourizing furnace 103 stoker fired grate formula moving hearth 105, rubbish is penetrated again by an air holes injection on moving hearth 105, gasify, wind supply quantity is regulated by the first variable valve 207 on each arm of correspondence. the flue gas generation certain pressure that vapourizing furnace 103 secondary air is high-temperature blower extraction incinerator 104 blasts vapourizing furnace 103 burner hearth, and its jet hole encircles with on rear arch before being arranged on vapourizing furnace 103. forward and backward arch is provided with two times for air port 115, it is to increase gasification efficiency, strengthens polymer substance in flue gas and decompose. having igniting combustion supporting hole 114 on rear arch, in furnace lifting, baker and stable vapourizing furnace 103, temperature uses, and regulates wind supply quantity by the first variable valve 207 on each arm of correspondence. the inlet mouth of described 2nd blower fan 203 and atmosphere, the air that the 2nd blower fan 203 blasts can be cold wind or the hot blast after heating. the air outlet of described 2nd blower fan 203 connects the house steward of the 2nd manifold 205, the arm of described 2nd manifold 205 is connected with air inlet end, the outlet side of each air compartment 107 below incinerator 104 moving hearth 105 and cleaning apparatus 201 respectively, and each arm of described 2nd manifold 205 arranges the 2nd variable valve 208 respectively. incinerator 104 First air is that the air of certain pressure is blasted in an air compartment 107 corresponding below stoker fired grate formula moving hearth 105 by gas blower, residue is penetrated again by an air holes injection on moving hearth 105, carry out residual burning, regulate wind supply quantity by the first variable valve 207 on each arm of correspondence. the air inlet end of cleaning apparatus 201, the air intake of outlet side are that temperature adjustment is for wind, temperature adjustment is that the air of certain pressure is blasted incinerator 104 and exports (i.e. cyclone inlet) and carry out temperature adjustment by gas blower for wind, simultaneously, Cyclone outlet (i.e. high-temperature blower entrance) blasts further temperature adjustment, regulates wind supply quantity by the first variable valve 207 on each arm of correspondence.
Fig. 2 is the structural representation of cyclone combustion chamber 3. The upper end of described cyclone combustion chamber 3 is provided with combustion chamber ignition combustion-supporting hole 301, the lower end of cyclone combustion chamber 3 is provided with the taper slag notch 302 that radius from top to bottom diminishes, the top of described cyclone combustion chamber 3 circumferential wall arranges smoke inlet 303, the bottom of described cyclone combustion chamber 3 circumferential wall arranges the 3rd exhanst gas outlet 304, evenly being provided with some combustion-supporting wind in the circumferential wall of described cyclone combustion chamber 3 for air port 305, each combustion-supporting wind supplies air port 305 all between smoke inlet 303, the 3rd exhanst gas outlet 304. Described smoke inlet 303, the 3rd exhanst gas outlet 304 are positioned at the opposition side of cyclone combustion chamber 3 circumferential wall; Described 3rd exhanst gas outlet 304 is along cyclone combustion chamber 3 circumferential wall radial direction or tangentially arranges. Also comprise the 3rd manifold 206, the house steward of described 3rd manifold 206 is connected with the air outlet of the 2nd blower fan 203, each arm of described 3rd manifold 206 is connected for air port 305 with each combustion-supporting wind respectively, and each arm of the 3rd manifold 206 arranges the 3rd variable valve 209 respectively. Smoke inlet 303 and the combustion-supporting confession air port of cyclone combustion chamber 3 are all arranged in cyclone combustion chamber 3 circumferential wall, it is possible to be that the flue gas in cyclone combustion chamber 3 and air mixed time are longer, mix more even, burn more fully. Cyclone combustion chamber 3 is combustion-supporting is that the air of certain pressure is blasted and combustion-supporting enters cyclone combustion chamber 3 for air port injection by gas blower for wind, and combustion-supporting to enter direction for wind can be radial or tangential; Carry out syngas combustion. Simultaneously, the flue gas generation certain pressure that high-temperature blower extracts incinerator 104 blasts the secondary air chamber on an air compartment 107 corresponding below vapourizing furnace 103 stoker fired grate formula moving hearth 105 and the forward and backward arch of vapourizing furnace 103, described first manifold 204 also has an arm being connected with cyclone combustion chamber smoke inlet, and this arm is provided with corresponding variable valve. What high-temperature blower extracted has not utilized residue partial fume, cyclone combustion chamber 3 is entered again by the injection of cyclone combustion chamber 3 smoke inlet, carry out syngas combustion, wind supply quantity is regulated by the variable valve of correspondence, this structure can reduce thermal losses and improve heat exchanger effectiveness, substantially increase the organic efficiency of heat, and can decreasing pollution thing quantity discharged effectively.
Described incinerator 104 is provided with cinder notch 117, and the slag notch 116 of described incinerator 104 is positioned at incinerator and falls the underface of cinder notch 117, described in the cinder notch 117 that falls be connected by the slag notch of pipeline with cleaning apparatus 201. This sealing structure is effective, it is possible to effectively hold decreasing pollution thing quantity discharged.
A waste disposal method for stoker fired grate formula refuse gasification incineration system, the method carries out according to the following steps:
Steps A, close the gate of stoker fired grate formula refuse gasification incinerator 1 with atmospheric vent, start machinery grate-type refuse gasification incinerator 1, garbage raw material is dropped into feed hopper 102, the reciprocal repeatedly pusher of garbage pusher device 106, the garbage raw material fallen from feed hopper 102 is pushed away into feed hopper 102, windrow seal section 108 between vapourizing furnace 103, windrow seal section 108 is made to form windrow sealed state, unnecessary rubbish falls into the moving hearth 105 of vapourizing furnace 103, the moving hearth 105 of vapourizing furnace 103 works, rubbish is conveyed into transition fall slag section 109, the reciprocal repeatedly pusher of residue stock pusher 110, rubbish transition fallen in slag section 109 pushes away in incinerator 104, the moving hearth 105 of incinerator 104 works conveying garbage, until rubbish is at vapourizing furnace 103, the moving hearth 105 of incinerator 104 is accumulated to required thickness: 0.6-0.8m, , during baker, the rubbish piled up can protect moving hearth 105, prevent scaling loss siege 105. stop throwing material to feed hopper 102, the moving hearth 105 of vapourizing furnace 103 and incinerator 104 stops work, then, communicated with the burner hearth of vapourizing furnace 103 and incinerator 104 respectively by the igniting combustion supporting hole 114 of vapourizing furnace 103 and incinerator 104 with pilot burner, under the effect of pilot burner, vapourizing furnace 103 and incinerator 104 are carried out furnace lifting, baker, treats that this process stabilization completes, make vapourizing furnace 103 and incinerator 104 burner hearth reach preset temperature 600-700 DEG C, the object of baker is in order to de-except the natural water in lining and crystal water, in order to avoid when going into operation owing to furnace temperature rises too fast, moisture content expands in a large number to cause body of heater spalling, bubbling or be out of shape even furnace wall and collapses, and affects intensity and the work-ing life of process furnace furnace wall.
Step B, start and regulate circulation air feed system 2, regulate vapourizing furnace 103, processing parameter (the stock pusher speed of incinerator 104 and circulation air feed system 2, fire grate speed, a wind-warm syndrome, blast and air quantity, secondary air temperature, blast and air quantity, furnace temperature, negative pressure in stove, bed thickness etc.), material is thrown to feed hopper 102, the moving hearth 105 of vapourizing furnace 103 works conveying garbage, rubbish starts to burn in the burner hearth of vapourizing furnace 103, rubbish residue transition fall slag section 109 place pile up formed windrow sealing, the burner hearth combustion state temperature of vapourizing furnace 103 is made to be stabilized to more than 850 DEG C, the rubbish residue that the moving hearth 105 of incinerator 104 works and exports after burning.
Step C, regulate each processing parameter (in stock pusher speed, fire grate speed, wind-warm syndrome, blast and air quantity, secondary air temperature, blast and air quantity, furnace temperature, stove negative pressure, bed thickness etc.) of vapourizing furnace 103, incinerator 104 and circulation air feed system 2, rubbish is gasified by vapourizing furnace 103 gradually, gasification temperature is stabilized between 700-800 DEG C, making the stable generation of vapourizing furnace 103 containing the high-temperature flue gas of 10%-20% synthetic gas, vapourizing furnace 103 vaporized state is stable carries out low temperature, middle temperature or high-temperature gasification. Make incinerator 104 state of combustion temperature-stable to more than 850 DEG C, it is achieved the continuous gasification burning process of rubbish; Each processing parameter of cyclone combustion chamber 3 need to be regulated simultaneously, make cyclone combustion chamber 3 the 3rd exhanst gas outlet 304 temperature-stable to more than 850 DEG C.
Step D, need to overhaul or during blowing out, stop throwing material, regulate the processing parameter of vapourizing furnace 103, incinerator 104 and circulation air feed system 2, vapourizing furnace 103 is made to return to state of combustion gradually, after rubbish and rubbish residue burn, close stoker fired grate formula refuse gasification incinerator 1 and circulation air feed system 2. Each processing parameter of cyclone combustion chamber 3 need to be regulated simultaneously, make vapourizing furnace 103 return to state of combustion gradually.
What finally illustrate is, above preferred embodiment is only in order to illustrate the technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, in the form and details it can be made various change, and do not deviate claims of the present invention limited range.

Claims (10)

1. a stoker fired grate formula refuse gasification incineration system, comprise incinerator, it is characterized in that: described incinerator comprises stove frame, and the feed hopper arranged successively along feedstock direction on stove frame, vapourizing furnace and incinerator, the rear of vapourizing furnace is the cinder notch that falls of vapourizing furnace, incinerator is positioned at vapourizing furnace and falls the front lower place of cinder notch, the rear of incinerator is the slag notch of incinerator, described stove frame is provided with garbage pusher device, described garbage pusher device is positioned at the lower section of feed hopper, for the rubbish in feed hopper is pushed away in vapourizing furnace, the lower section of vapourizing furnace moving hearth and the lower section of incinerator moving hearth are respectively equipped with at least one air compartment independently arranged, described feed hopper, windrow seal section it is provided with between vapourizing furnace, stove frame part between described vapourizing furnace and incinerator leaves transition fall slag section, the described transition slag section that falls is provided with residue stock pusher, for the rubbish fallen in vapourizing furnace residue is pushed away in incinerator,
Described vapourizing furnace, incinerator comprise furnace shell, moving hearth respectively, the forward and backward side of described vapourizing furnace respectively by windrow seal section, transition fall slag section sealing, described transition fall slag section isolation vapourizing furnace, incinerator, make vapourizing furnace, incinerator separate;
Described vapourizing furnace, incinerator are respectively in the shape that arches upward, the front arch of described vapourizing furnace, rear arch arrange two times respectively for air ports, the vault of described vapourizing furnace arranges the first exhanst gas outlet, the vault of described incinerator arranges the 2nd exhanst gas outlet, and described vapourizing furnace, incinerator are respectively equipped with igniting combustion supporting hole;
Also comprise circulation air feed system, described circulation air feed system comprises cleaning apparatus, first blower fan, 2nd blower fan, the air inlet end of described cleaning apparatus is connected with the 2nd exhanst gas outlet by pipeline, the outlet side of described cleaning apparatus is connected with the air inlet end of the first blower fan by pipeline, the outlet side of described first blower fan connects the house steward of the first manifold, the arm of described first manifold respectively with each air compartment of the lower section of vapourizing furnace moving hearth and vapourizing furnace before arch, on rear arch two times are connected for air port, each arm of described first manifold arranges the first variable valve respectively, the inlet mouth of described 2nd blower fan and atmosphere, the air outlet of described 2nd blower fan connects the house steward of the 2nd manifold, the arm of described 2nd manifold respectively with incinerator moving hearth below each air compartment and the air inlet end of cleaning apparatus, outlet side is connected, each arm of described 2nd manifold arranges the 2nd variable valve respectively.
2. a kind of stoker fired grate formula refuse gasification incineration system according to claim 1, it is characterized in that: also comprise the cyclone combustion chamber for secondary combustion, the upper end of described cyclone combustion chamber is provided with combustion chamber ignition combustion-supporting hole, the lower end of cyclone combustion chamber is provided with the taper slag notch that radius from top to bottom diminishes, the top of described cyclone combustion chamber circumferential wall arranges smoke inlet, the bottom of described cyclone combustion chamber circumferential wall arranges the 3rd exhanst gas outlet, the circumferential wall of described cyclone combustion chamber is evenly provided with some combustion-supporting wind for air port, each combustion-supporting wind is all positioned at smoke inlet for air port, between 3rd exhanst gas outlet.
3. a kind of stoker fired grate formula refuse gasification incineration system according to claim 2, it is characterised in that: described smoke inlet, the 3rd exhanst gas outlet are positioned at the opposition side of cyclone combustion chamber circumferential wall; Described 3rd exhanst gas outlet is along cyclone combustion chamber circumferential wall radial direction or tangentially arranges.
4. a kind of stoker fired grate formula refuse gasification incineration system according to Claims 2 or 3, it is characterized in that: also comprise the 3rd manifold, the house steward of described 3rd manifold is connected with the air outlet of the 2nd blower fan, each arm of described 3rd manifold is connected for air port with each combustion-supporting wind respectively, and each arm of the 3rd manifold arranges the 3rd variable valve respectively.
5. a kind of stoker fired grate formula refuse gasification incineration system according to claim 1, it is characterised in that: described cleaning apparatus is cyclonic separator or hot precipitator; Described first blower fan is high-temperature blower, and described 2nd blower fan is gas blower.
6. a kind of stoker fired grate formula refuse gasification incineration system according to claim 1, it is characterised in that: described transition falls and is provided with isolating door to be opened/closed in slag section, and described isolating door is used for cutting off vapourizing furnace, incinerator.
7. a kind of stoker fired grate formula refuse gasification incineration system according to claim 1, it is characterised in that: the front arch of described vapourizing furnace is flat construction, or, the front arch of vapourizing furnace is that rear end is inclined upwardly structure.
8. a kind of stoker fired grate formula refuse gasification incineration system according to claim 1, it is characterized in that: described incinerator is provided with cinder notch, the slag notch of described incinerator is positioned at incinerator and falls the underface of cinder notch, and the described incinerator cinder notch that falls is connected with the slag notch of cleaning apparatus by pipeline.
9. the waste disposal method of a stoker fired grate formula refuse gasification incineration system, it is characterised in that the method carries out according to the following steps:
Steps A, close the gate of stoker fired grate formula refuse gasification incinerator and atmospheric vent, start machinery grate-type refuse gasification incinerator, garbage raw material is dropped into feed hopper, the reciprocal repeatedly pusher of garbage pusher device, the garbage raw material fallen from feed hopper is pushed away into feed hopper, windrow seal section between vapourizing furnace, windrow seal section is made to form windrow sealed state, unnecessary rubbish falls into the moving hearth of vapourizing furnace, the moving hearth work of vapourizing furnace, rubbish is conveyed into transition fall slag section, the reciprocal repeatedly pusher of residue stock pusher, rubbish transition fallen in slag section pushes away in incinerator, the moving hearth work conveying garbage of incinerator, until rubbish is at vapourizing furnace, the moving hearth of incinerator is accumulated to required thickness, stop throwing material to feed hopper, the moving hearth stopping work of vapourizing furnace and incinerator, then, with pilot burner by the igniting combustion supporting hole of vapourizing furnace and incinerator respectively burner hearth with vapourizing furnace and incinerator communicate, under the effect of pilot burner, vapourizing furnace and incinerator are carried out furnace lifting, baker, treat that this process stabilization completes, vapourizing furnace and incinerator burner hearth is made to reach preset temperature 600-700 DEG C,
Step B, startup regulate circulation air feed system, regulate the processing parameter of vapourizing furnace, incinerator and circulation air feed system, material is thrown to feed hopper, the moving hearth work conveying garbage of vapourizing furnace, rubbish starts to burn in the burner hearth of vapourizing furnace, rubbish residue is piled up form windrow sealing at the transition slag section place that falls, and makes the burner hearth combustion state temperature of vapourizing furnace be stabilized to more than 850 DEG C, and the work of the moving hearth of incinerator exports the rubbish residue after burning;
Each processing parameter of step C, adjustment vapourizing furnace, incinerator and circulation air feed system, rubbish is gasified by vapourizing furnace gradually, make vapourizing furnace stablize the synthetic gas producing 10%-20%, make incinerator state of combustion temperature-stable to more than 850 DEG C, it is achieved the continuous gasification burning process of rubbish;
Step D, need to overhaul or during blowing out, stop throwing material, regulate the processing parameter of vapourizing furnace, incinerator and circulation air feed system, make vapourizing furnace return to state of combustion gradually, after rubbish and rubbish residue burn, close stoker fired grate formula refuse gasification incinerator and circulation air feed system.
10. the waste disposal method of a kind of stoker fired grate formula refuse gasification incineration system according to claim 9, it is characterized in that: in step C, regulate each processing parameter of cyclone combustion chamber simultaneously, make cyclone combustion chamber the 3rd flue gas exit temperature be stabilized to more than 850 DEG C; In step D, regulate each processing parameter of cyclone combustion chamber simultaneously, make vapourizing furnace return to state of combustion gradually.
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