CN106642138A - Waste gasification melting furnace - Google Patents

Waste gasification melting furnace Download PDF

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Publication number
CN106642138A
CN106642138A CN201611252449.2A CN201611252449A CN106642138A CN 106642138 A CN106642138 A CN 106642138A CN 201611252449 A CN201611252449 A CN 201611252449A CN 106642138 A CN106642138 A CN 106642138A
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China
Prior art keywords
gasification
melting
water
furnace
air
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Granted
Application number
CN201611252449.2A
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Chinese (zh)
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CN106642138B (en
Inventor
李长江
肖大志
刘德绍
林顺洪
徐�明
杨鲁
季炫宇
田野
阳小燕
李玉
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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 CN201611252449.2A priority Critical patent/CN106642138B/en
Publication of CN106642138A publication Critical patent/CN106642138A/en
Application granted granted Critical
Publication of CN106642138B publication Critical patent/CN106642138B/en
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Classifications

    • 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
    • F23G5/002Incineration of waste; Incinerator constructions; Details, accessories or control therefor characterised by their grates
    • 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
    • F23G5/04Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • 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
    • F23G5/16Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
    • 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
    • F23G5/46Recuperation of heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/10Drying by heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2201/00Pretreatment
    • F23G2201/40Gasification
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2206/00Waste heat recuperation
    • F23G2206/10Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying

Abstract

The invention discloses a waste gasification melting furnace; and the waste gasification melting furnace is used for treating garbage, is higher in garbage conveying capacity, is higher in garbage treatment quantity, can reduce the heat loss and improve the heat exchange efficiency, is higher in heat recovery efficiency, and can effectively reduce the pollutant discharge. The waste gasification melting furnace comprises a furnace frame, and a feeding bin, a gasification furnace and a melting curing treatment system arranged on the furnace frame in sequence in a feeding direction; the melting curing treatment system includes a melting hearth, a laminar channel, a water cooling crushing system and a water seal deslagging system arranged in the feeding direction in sequence; a high-temperature combustor and a gasification agent inlet are arranged on a side wall of the melting hearth; the water cooling crushing system includes a water cooling system, a water cooling cavity and a glass body crusher; and a discharge end of the water seal deslagging system is connected with a glass body deslagging outlet.

Description

Waste gasification melting furnace
Technical field
The invention belongs to Waste Disposal Technology field, more particularly to a kind of waste gasification melting furnace.
Background technology
Existing Waste Disposal Technology mainly has burning, sanitary landfills, compost, waste recovery etc..In offal treatment In routine techniques, burning disposal has reduced training substantially, and innoxious thorough, occupation of land amount is little, and waste heat energy is obtained by, secondary dirt The advantages of dye is few, meets the strategic requirement of China's sustainable development.But with both at home and abroad to the continuous improvement of environmental requirement, how Strengthen particularly important to the control of secondary pollution.Therefore, pyrolysis of waste gasification burning technology is gradually shifted onto industrial applications Road on, primarily now use all kinds of incineration technologies, gasification burning and gasification especially for domestic various discarded objects Widely the technological innovation for bringing domestic offal treatment industry is regenerated in industrialization to fusion technology.
For many years, China to biomass, house refuse, medical waste, the Changjiang river floating thing, domestic sludge, oily sludge and The scientific research of the gasification&melting technologies such as electronic product, is in progress a lot of, and the basic research in laboratory is a lot, also there is application study, Such as:Rotary kiln type, vertical and fluidized bed type destructive gasifying or temperature gasification and high fusion technology etc..But in Technique Popularizing application still There is a definite limitation, raw material type, offal treatment amount, secondary pollution control and economic benefit etc. is principal element.
In existing burning process and equipment, fire grate type incinerator is various informative, and its application accounts for the whole world and burns market More than the 80% of total amount, wherein mainly adopting mechanical backstepping fire grate, forwards fire grate or combined fire grate in body of heater, also there is employing The fire grate such as chain-plate type and drum-type.Domestic developing rapidly through last decade, the popularization and application of fire grate type incinerator have obtained state Family and the attention of various circles of society, burn at home market and have absolute predominance.
In sum, typical incinerator and melting furnace, respectively there is its own advantage, but in China's practical application The middle problem and shortage for needing to solve:
1., for characteristics such as China's house refuse water content height, complicated components, the technology of moving hearth is used, to rubbish Conveying capacity needs emphasis to consider.
2. being on the increase with discarded object yield, pile up like a mountain, and treating capacity must be effectively improved, Cai Nengshi Answer the market demand.
3. require in the face of strict pollutant emission, secondary pollution control is the key problem for technically needing to solve.
4., in order to effectively increase economic efficiency, in heat treatment process, the organic efficiency of heat needs to improve.It is existing useless Generally using release heat is burned, boiler conversion produces steam and shifts steam turbine power generation, whole transition heat onto gurry heat treatment technics Efficiency losses are larger, process identical quantity of refuse, and relative thermal losses and the raising heat exchanger effectiveness of reducing can just improve the thermal efficiency.
The for example following two patents of invention of existing incinerator:Multiple row sectional drive combined type domestic garbage incinerator (ZL200710092508.9) an open question and in two-stage garbage incinerator (ZL201010268376.2):Castoff heat Tupe is relatively backward, be simply dried-burns-burns, and solid combustion discharges the process of heat;Thermal chemical reaction is with oxygen in stove Change based on reaction, reduction reaction auxiliary is also easy to produce secondary pollution;When discarded object burns in stove, oxygen quotient is crossed greatly, once Wind, Secondary Air infeed amount are big, and dust content is higher in flue gas, affect larger to heat reclaiming system and smoke processing system, hold Easy dust stratification, exhaust gas volumn is larger, reduces thermal conversion efficiency;The gasification furnace not being separately provided and incinerator, can only be processed by several times Rubbish, it is impossible to realize large-scale discarded object continuous gasification burning disposal, garbage treatment quantity is less.
The for example following two technologies of existing melting furnace:
First, gasification and melting focuses on technology.As a kind of plasma asistance heats fusion and gasification reactor (CN201410744643.7), waste gasification melting furnace (CN201280068994.X), domestic waste oxygen top blown are straight Connect fusion and gasification, and combustion and its generation technology (CN01107088.9) and other pot type gasification and meltings focus on technology, wherein not The problem of solution:Castoff heat tupe is more advanced, but mainly continues the thinking of fixed bed or fluid bed, is done Dry-pyrolysis-gasification-burning (also can without burning)-melting, heat treatment process continuity is bad, and each phase process rhythm is difficult to Match somebody with somebody, and the recycling link of heat considers inadequate, economy is poor, it is impossible to realize large-scale discarded object continuous gasification melting Process, treating capacity is less, and it is imperfect to melt Slag treatment.
Second, gasification+melting separating treatment technology.Such as a kind of gasification of rotary kiln, the house refuse classification of plasma melting The method that gasification system (CN201520578876.4), a kind of rotary kiln to melt gasification house refuse produce combustible gas (CN200910218227.2), refuse gasification and flying dust high-temperature fusion processing meanss and method (CN200710144924.9) and its Its pot type separating treatment technology, wherein an open question:Castoff heat tupe is more advanced, but mainly continues fixation The thinking of bed or fluid bed, is dried-is pyrolyzed-gasify-burn (also can without burning)-melting, main gasification and melting rank Section is separated in different equipment and carries out, and preferably, but the rhythm between separation phase is still difficult to heat treatment process continuity Match somebody with somebody, and the recycling link of heat considers inadequate, economy is poor, it is impossible to realize large-scale discarded object continuous gasification melting Process, treating capacity is less, and it is imperfect to melt Slag treatment.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of waste gasification melting furnace, using this Rubbish is managed in daylight, and rubbish conveying capacity is higher, and garbage treatment quantity is bigger, can reduce thermal losses and improve heat exchanger effectiveness, heat The organic efficiency of amount is higher, and can efficiently reduce pollutant discharge amount.
The object of the present invention is achieved like this:
A kind of waste gasification melting furnace, the waste gasification melting furnace includes grate, and along charging on grate Feed hopper, gasification furnace and melting and solidification processing system that direction sets gradually, the melting and solidification processing system is located at gasification furnace The lower section of discharge end, the melting and solidification processing system includes melting burner hearth, laminar flow channel, the water set gradually along feedstock direction Cold crushing system and water seal slag removing system, the melting burner hearth side wall is provided with high-temperature burner, gasification agent inlet, for make from Gasification furnace enters the castoff fusing of melting burner hearth, and the laminar flow channel is located at melting burner hearth discharge end lower section, laminar flow channel bottom Portion is that laminar flow inclines siege, and the water-cooled crushing system includes water-cooling system, waterway and vitreum pulverizer, the water-cooled Chamber is located at laminar flow channel front lower place, and waterway top arranges spray assemblies and steam (vapor) outlet, and the water-cooling system will be used for water-cooled Water input spray assemblies, the steam that steam (vapor) outlet output water-cooled is produced, the vitreum pulverizer is arranged on waterway Middle part, for crushing liquid slag water-cooled after formed vitreum slag, the water seal slag removing system located at waterway lower section, water seal The discharge end connection vitreum slag outlet of slag removing system, the water seal slag removing system is used to seal waterway lower end, prevents cigarette Gas is escaped, and vitreum slag is further cooled down, and exports vitreum slag.
In order to realize large-scale waste gasification melt process, it may be preferable that the melting burner hearth roof is provided with water conservancy diversion Rear arch and baffle pier, make flue gas horizontally enter into gasification hearth, increase the radiating surface of discarded object and the flue gas disturbance of gasification hearth.
In order to control the discharging speed of laminar flow channel, various operating modes are successfully managed, it may be preferable that the laminar flow inclines siege and goes out Material end arranges liquid slag height controller, and the height controller includes baffle plate and the driving for driving baffle plate flexible Part.
In order to ensure the temperature control in laminar flow channel, it is preferable that the laminar flow channel side wall setting calandria carries out auxiliary Help heating and be incubated.
Preferably, the grate is provided with discarded object and promotes mainly glassware, and the discarded object promotes mainly glassware under feed hopper Side, for the discarded object in feed hopper to be pushed in gasification furnace, is provided with windrow seal section, institute between the feed hopper, gasification furnace State setting base material material inlet on the roof of windrow seal section, the base material material inlet connection base material feed dress Put, base material Jing base material material inlets are pushed windrow seal section by the base material feeder, for by discarded object The element portions such as sulphur, copper, iron during gasification and melting are converted into stable compound, and liquid slag is fluxed.
In order to improve capacity usage ratio and reduce water resources consumption, it is preferable that the moving hearth edge of the gasification furnace is entered Material direction is divided into dryer section, gasification section, and the dryer section of the gasification furnace, gasification section are respectively arranged below with least one and are independently arranged An air compartment, wherein, below dryer section a air compartment is air-supplied, below gasification section a air compartment feed mixing gasifying Agent, the gasification furnace is respectively provided with secondary confession air port in arching upward shape on the face arch of the gasification furnace, rear arch, the gasification furnace Vault arranges the first exhanst gas outlet;
Also include steam air exhauster, for blower fan, gasifying agent blender, the arrival end of the steam air exhauster by pipeline with Steam (vapor) outlet connection at the top of waterway, the steam produced in the waterway injects the gasifying agent by steam air exhauster to be mixed One air inlet of clutch, the air inlet and atmosphere of the confession blower fan, the gas outlet of the confession blower fan connects a manifold House steward, the arm of the manifold respectively with gasifying agent blender another air inlet, gasification furnace dryer section below an air compartment, The secondary confession air port connection of gasification furnace, the gasifying agent blender is used for the steam of mixed vapour air exhauster extraction and carries for blower fan For air form hybrid gasification agent, the hybrid gasification agent feeds melting burner hearth from gasification agent inlet, and hybrid gasification agent also makees An air compartment below gasification furnace gasification section is fed for gasification furnace First air.
In order to improve capacity usage ratio, reduce residue discharge capacity, it is preferable that the melting burner hearth be connected with gasification furnace one Hold to melt the discarded object main-inlet of burner hearth, the melting burner hearth side wall arranges again discarded object sub-inlet, and the discarded object pair enters Mouth connection discarded object pair material-pulling device, discarded object pair material-pulling device is molten for the residue of each air compartment below gasification furnace to be pushed Melt in burner hearth.
In order to reduce water resources consumption amount, it is preferable that the condensed water that the hybrid gasification agent mixed process is produced is by pipe Road is input into water-cooling system, and the unnecessary cooling water of the water seal slag removing system is recycled using back water pump injection water-cooling system.
As a result of above-mentioned technical proposal, the present invention has the advantages that:
The present invention adopts stoker fired grate, refuse gasification and melt stage to carry out in same equipment, and heat treatment process is continuous Property preferably, the rhythm matching between each stage, the recycling link of heat takes into full account, better economy, can realize big The rubbish continuous gasification melt process of scale, garbage treatment quantity is larger, and liquid slag carries out harmless treatment.
Present inventive concept is novel, and garbage treatment quantity is big, and the rubbish bed of material experiences on stoker fired grate and is dried, gasifies and melts rank Section, adapts to the characteristics such as China's house refuse water content height, complicated component, improves the energy conversion efficiency in garbage processing procedure With pollutant discharge amount in reduction flue gas, secondary pollution is effectively prevented, and large-scale rubbish continuous gasification melting can be realized Process, it is ensured that refuse gasification melts effect and lime-ash clinker ignition loss, relative to reduce thermal losses and improve heat exchanger effectiveness, improves The thermal efficiency.
From the pressure change of melting furnace-exhanst gas outlet of gasification furnace-the first, gasification furnace disturbance effect, baffle pier shape are enhanced Into split channel increase high-temperature flue gas radiating surface.
The present invention effectively carries out secondary pollutant control, realizes minimizing, Harmless and Comprehensive Disposal, and concrete grammar is such as Under:
1 suppresses to reduce the secondary pollutions such as SOx, NOx by base material (can adopt lime) from melting furnace source Produce, and the catalyst member such as secondary pollution Fe, Cu for synthesizing again changes into stable compound;
2 high-temperature fusions decompose, solidify bottom ash and the toxicant in flying dust, realize garbage incinerating power plant without the useless bottom ash of danger Discharge, be that directly landfill or recycling are laid a good foundation.
Description of the drawings
Fig. 1 is the structural representation of the present invention;
Fig. 2 is the structural representation of melting and solidification processing system;
Fig. 3 is the A-A cross section structure diagrams of Fig. 2;
Fig. 4 is the structural representation for moving towards section view in Fig. 2 at B along flue gas;
Fig. 5 is the C-C cross section structure diagrams of Fig. 2;
Fig. 6 is the D-D cross section structure diagrams of Fig. 2;
Fig. 7 is the structural representation of steam generator system in Fig. 1;
Fig. 8 is cyclone combustion chamber structural representation in Fig. 7;
Fig. 9 is the schematic top plan view of Fig. 8.
Reference
1 is incinerator, and 101 is grate, and 102 is feed hopper, and 103 is gasification furnace, and 105 is siege, and 106 is discarded object Glassware is promoted mainly, 107 is an air compartment, and 108 is windrow seal section, and 112 is the first exhanst gas outlet, and 115 is secondary confession air port;
201 is steam air exhauster, and 202 is to supply blower fan, and 203 is gasifying agent blender, and 204 is manifold, and 205 add again for air Hot device;
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, 304 For the 3rd exhanst gas outlet, 305 supply air port for combustion air;
4 is boiler body, and 402 is furnace chamber a, and 403 is furnace chamber b, and 404 is furnace chamber c, and 405 is water-cooling wall, and 406 is superheater, 407 is evaporimeter, and 408 is drum, and 409 is the first down-comer, and 410 is the second down-comer, and 411 is steam output device, and 412 are Feedwater input system, 418 is economizer, and 419 is flue gas purification system, and 420 is aeration tower, and 421 is sack cleaner, and 422 are Air-introduced machine, 423 is chimney, and 424 is air preheater, and 425 is fine purifiation deduster, and 426 is depickling drug jetting device, and 427 are work Property charcoal jetting device;
5 is melting and solidification processing system, and 51 are melting burner hearth, and 52 is laminar flow channel, and 53 is water-cooling system, and 54 remove for water seal Slag system, 55 is high-temperature burner, and 56 is gasification agent inlet, and 57 is that laminar flow inclines siege, and 58 is waterway, and 59 is vitreum powder Broken machine, 510 is spray assemblies, and 511 is steam (vapor) outlet, and 512 is water conservancy diversion rear arch, and 513 is baffle pier, and 514 is height controller, 515 is calandria, and 516 is vitreum slag outlet, and 517 is base material feeder, and 518 is discarded object main-inlet, and 519 are Discarded object sub-inlet, 520 be discarded object pair material-pulling device, 521 inorganic waste entrances, 522 be inorganic waste material-pulling device, 523 is back water pump, and 524 is rewinding clinohedral, and 525 is maintenance door, and 526 is slag remover, and 527 is denitrfying agent jetting device, and 528 are Gasification furnace side wall, 529 are shunting flue.
Specific embodiment
It is a kind of preferred embodiment of waste gasification melting furnace referring to Fig. 1 to Fig. 9.The present embodiment also add pot Furnace system, the waste gasification melting furnace includes grate, and feed hopper, the gas set gradually along feedstock direction on grate Change stove and melting and solidification processing system, the discharge end of melting and solidification processing system is vitreum slag outlet.
The grate is provided with discarded object and promotes mainly glassware, and the discarded object is promoted mainly glassware positioned at the lower section of feed hopper, is used for Discarded object in feed hopper is pushed in gasification furnace, windrow seal section is provided between the feed hopper, gasification furnace, the windrow is close Base material material inlet is set on the roof of envelope section, and the base material material inlet connects base material feeder, the alkali Base material (during gasification and melting, with the Partial Elements in discarded object stable compound is formed, is subtracted by base material feeder Of low pollution thing is entered in flue gas;The melt temperature of part residue can be suitably reduced simultaneously) Jing base material material inlets push windrow Seal section.
The moving hearth of the gasification furnace is divided into dryer section, gasification section, the dryer section of the gasification furnace, gas along feedstock direction Change section and be respectively arranged below with least one air compartment being independently arranged, wherein, below dryer section a air compartment is air-supplied, An air compartment below gasification section feeds hybrid gasification agent, the gasification furnace in the shape that arches upward, on the face arch of the gasification furnace, rear arch Secondary confession air port is respectively provided with, the vault of the gasification furnace arranges the first exhanst gas outlet.
The discharge end of the gasification furnace for gasification furnace the cinder notch that falls, melting and solidification processing system falls cinder notch positioned at gasification furnace Front lower place, the melting and solidification processing system includes melting burner hearth, laminar flow channel, water-cooled crushing system and water seal slag removing system, Water-cooled crushing system and water seal slag removing system are provided with water charging system, the melting and solidification processing system top be provided with water conservancy diversion rear arch and Baffle pier, the water conservancy diversion rear arch that the melting roof of the furnace is arranged (can be circular arc, involute arc, realize flue gas for arc Smooth break-in), melt the flue gas vertically moving entrance water conservancy diversion rear arch inner side in burner hearth, cigarette after arc rear arch water conservancy diversion The gas Nogata that flattens (makes flue gas with certain speed and horizontally enters into gasification hearth, increase the radiating surface and gasification furnace of discarded object to motion The flue gas disturbance of thorax);The baffle pier extends to gasification furnace rear arch middle part from water conservancy diversion rear arch flat segments, and arranges multiple points Stream pier, correspondence grate surface quantity formed it is multiple shunting flues (for fire grate be multiple (more than 2) grate surfaces, melting burner hearth compared with It is little, enable flue gas to be radiated each grate surface, increase the radiating surface of discarded object and the flue gas disturbance of gasification hearth), the gasification Stove falls multiple rewinding clinohedrals composition that cinder notch is correspondence grate surface quantity.
The melting burner hearth side wall is provided with high-temperature burner, gasification agent inlet and discarded object sub-inlet (discarded object major-minor Charging is organic and inorganic, it need to be gasified and be melted);The high-temperature burner that the melting burner hearth side wall is arranged for etc. Plasma generator or heavy oil burner or pure oxygen combustor (can maintain the burner of 1400-1600 DEG C of high temperature of melting zone equal Can), diagonally downward, 30-60 ° (utilizes melting furnace diameter, setting height(from bottom), flame to high-temperature burner entrance with horizontal plane angle The border condition design such as length, number of burners and size, discarded species, treating capacity), the gasification agent inlet (supplements molten Melt O2, H2O and CO2 needed for chemical reaction etc. in burner hearth) be arranged at discarded object sub-inlet lower section, and in castoff fusing slag it On, diagonally downward, 10-30 ° (utilizes melting furnace diameter, setting height(from bottom), gasifying agent to the gasification agent inlet with horizontal plane angle Entry number and the border condition design such as size, discarded species, treating capacity), the hybrid gasification agent is by adjusting entrance The air themperature of gasifying agent blender, makes hybrid gasification agent temperature stabilization at 400-500 DEG C.
The laminar flow channel bottom is that laminar flow inclines siege, and laminar flow inclines siege end setting liquid slag and highly controls dress Put, side wall arranges calandria (auxiliary heating and insulation), top arranges inorganic waste (only melting to it) entrance;It is described The laminar flow of laminar flow channel bottom inclines siege and is set to along liquid slag flow direction diagonally downward, is 5-15 ° with horizontal plane angle (the border condition design such as discarded species, the mobility of liquid slag, viscosity, treating capacity, time of staying), the liquid slag height Control device inclines siege and is vertically arranged (the scalable control liquid slag height of device) with laminar flow;Along liquid slag flow direction both sides Wall is respectively provided with calandria, and the calandria is that high energy electric heater or plasma generator (aid in heating and are incubated, can maintain 1400-1600 DEG C of high temperature of melting zone);The inorganic waste entrance incline direction that the top is arranged is along liquid slag flowing side To with the horizontal plane angle (border such as discarded species, the mobility of liquid slag, viscosity, treating capacity, time of staying that is 60-80 ° Condition design, inorganic waste pressure clamp-ons melting zone, can effectively decompose the pollutants such as bioxin, realizes containing heavy metal The melt process of bottom ash, flying dust etc.).
The waterway top of the water-cooled crushing system arranges spray assemblies and steam (vapor) outlet, and side wall arranges maintenance door, in Portion arranges vitreum pulverizer, and bottom arranges water seal slag removing system.The spray assemblies of the water-cooled crushing system are arranged at melting Slag outlet top, vertical direction is just to liquid slag outlet (can just water-cooled to liquid slag body, curing heavy metal), spray assemblies Spray inlet (reinforcing border water-cooled prevents border from cooling down insufficient) is set in the both walls of waterway, is with horizontal plane angle 30-60 ° (using the perimeter strip such as water-cooled chamber size, setting height(from bottom), spray length, quantity and size, discarded species, treating capacity Part is designed), the steam (vapor) outlet is arranged at away from liquid slag outlet outside top (a large amount of high-temperature steams can be excluded).It is described to set The vitreum pulverizer being placed in the middle part of waterway is located at liquid slag outlet lower section, and the embedded laminar flow uphill furnace bed of vitreum pulverizer Lower section, embedded size be two crushing wheels installation dimension arranged side by side 1/4-3/4 (realize vitreum slag enter two crushing wheels it Between), two crushing wheel energy rotatings work (preventing from getting stuck).
The steam utilization steam air exhauster injection gasifying agent blender produced in the waterway, the gasifying agent blender Hybrid gasification agent is formed for mixing high temperature air and steam, the hybrid gasification agent feeds melting burner hearth from gasification agent inlet, The condensed water that mixed process is produced returns water-cooling system.The unnecessary cooling water of the water seal slag removing system injects water using back water pump Cooling system is recycled.
The steam generator system includes boiler body, circulation air feed system, and the boiler body has cyclone combustion chamber, furnace chamber A, furnace chamber b, furnace chamber c, the lower end of the cyclone combustion chamber arranges smoke inlet, the smoke inlet of cyclone combustion chamber and the first flue gas Outlet, arranges denitrfying agent jetting device on the pipeline that the smoke inlet of cyclone combustion chamber is connected with the first exhanst gas outlet, use In denitration process are carried out to flue gas, denitrfying agent can adopt liquefied ammonia, remove the NOx in flue gas, high temperature denitration;Cyclone combustion chamber upper end For the 3rd exhanst gas outlet, the cyclone combustion chamber is provided with some combustion airs and supplies air port, some combustion airs to be located at for air port Between smoke inlet, the 3rd exhanst gas outlet, the 3rd exhanst gas outlet of cyclone combustion chamber upper end is connected with the upper end of furnace chamber a, described The lower end connection of furnace chamber a, furnace chamber b, the upper end of the furnace chamber b arranges waste gas outlet, in the cyclone firing room circumferentially arranged with Water-cooling wall in a ring, is provided with superheater in the furnace chamber a, evaporimeter is provided with furnace chamber b, and the top of boiler body is arranged Drum, the cyclone combustion chamber, furnace chamber a, furnace chamber b are respectively positioned on drum lower section, and the drum is provided with carbonated drink import, sets in drum There is water separator, for separating steam water interface, drum connects the water inlet of water-cooling wall by the first down-comer, for defeated Go out the water that water separator is isolated, drum connects the water inlet of evaporimeter by the second down-comer, for exporting carbonated drink point From the water that device is isolated, the water-cooling wall, the venthole of evaporimeter connect respectively the air intake of drum by steam pipe, for returning Stream high-temperature steam, the saturated vapor of the drum exports the air intake for connecting superheater by pipeline, for the high temperature that will be flowed back In steam input superheater, the venthole connection steam output device output superheated steam of the superheater, steam output device The condensed water produced using complete steam is inputed to water input system and is recycled.
The circulation air feed system includes steam air exhauster, for blower fan, gasifying agent blender, the steam air exhauster enters Mouth end is connected by pipeline with the steam (vapor) outlet at the top of waterway, and the steam produced in the waterway is noted by steam air exhauster Enter an air inlet of the gasifying agent blender, the air inlet and atmosphere of the confession blower fan, the outlet of the confession blower fan The air preheater arranged at mouth connection furnace chamber b waste gas outlets, the air preheater connects the house steward of a manifold, the manifold Arm respectively with gasifying agent blender another air inlet, gasification furnace dryer section below an air compartment, gasification furnace it is secondary Connect for air port for the combustion air on air port and the cyclone combustion chamber, in the present embodiment, air is provided with again in the furnace chamber b Heater, the gasifying agent blender is connected by pipeline and connect the manifold by pipeline again after air reheater.It is described Gasifying agent blender is used for the high temperature air formation mixing gasifying that the steam and steam generator system of mixed vapour air exhauster extraction is discharged Agent, the hybrid gasification agent feeds melting burner hearth from gasification agent inlet, and hybrid gasification agent also serves as gasification furnace First air and feeds gas Change an air compartment below stove gasification section.The condensed water that the hybrid gasification agent mixed process is produced is input into water-cooled system by pipeline System, the unnecessary cooling water of the water seal slag removing system is recycled using back water pump injection water-cooling system.
Described one end for being connected with gasification furnace of melting burner hearth is the discarded object main-inlet of melting burner hearth, the melting burner hearth side Wall arranges again discarded object sub-inlet, and the discarded object sub-inlet connection discarded object pair material-pulling device, discarded object pair material-pulling device is used In the residue of each air compartment in gasification furnace lower section is pushed in melting burner hearth, inorganic waste is set on the laminar flow channel roof Entrance, the inorganic waste entrance connects inorganic waste material-pulling device, and the inorganic waste material-pulling device is used for pot The inorganic residues that furnace system is collected are pushed in laminar flow channel.
The upper end of the furnace chamber c connects with the waste gas outlet of furnace chamber b upper ends, and the lower end of furnace chamber c arranges Waste gas outlet, institute State and economizer is provided with furnace chamber c, the water inlet of the economizer is connected with the delivery port of feedwater input system, the economizer The carbonated drink inlet communication of delivery port and drum.Flue gas purification system is also add in the present embodiment, the Waste gas outlet of furnace chamber c connects Flue gas purification system is connect, the flue gas purification system includes aeration tower, sack cleaner, the air inducing being sequentially connected in series along discharge directions Machine, fine purifiation deduster, chimney, the roof of the aeration tower arranges depickling drug jetting device, and the side wall of aeration tower arranges activated carbon Jetting device.
The sour gas such as depickling drug (lime white can be adopted), SOx, HCl, the HF in removing flue gas are sprayed into from aeration tower, it is low Warm neutralization reaction;Activated carbon sprays into heavy metal, bioxin in absorption flue gas etc.;Sack cleaner collects the flying dust in flue gas; Fine purifiation deduster is quenched and washes flue gas formula pollutant, and collects micronic dust, realizes flue gas pollutant minimum discharge.
A kind of waste gasification melting furnace processing method, the method is carried out according to the following steps:
Step A, furnace lifting, baker;
The gate of waste gasification melting furnace and atmospheric vent is closed, starts waste gasification melting furnace, discarded object is former The waste materials fallen from feed hopper are pushed feed hopper, gas by material input feed hopper, discarded object pusher pusher back and forth Change the windrow seal section between stove, make windrow seal section form windrow sealing state, unnecessary discarded object falls into the shifting of gasification furnace Dynamic siege, the moving hearth work of gasification furnace, until discarded object is accumulated to required thickness 800- in the moving hearth of gasification furnace 1000mm, stops being fed intake to feed hopper, and the moving hearth of discarded object pusher and gasification furnace quits work, and starts high-temperature burner With the side wall calandria baking melting burner hearth and laminar flow channel of laminar flow channel, furnace lifting, baker are carried out to waste gasification melting furnace, Waste gasification melting furnace burner hearth is set to reach 600-700 DEG C of predetermined temperature;
Step B, discarded object pyrolytic gasification in gasification furnace is made, residue enters melting in melting burner hearth;
Waste gasification melting furnace fire box temperature is gradually risen using high-temperature burner and calandria, recovers to be thrown to feed hopper The moving hearth of material, discarded object pusher and gasification furnace is started working, and feeds gasifying agent, and by adjusting gasifying agent blender is entered Air themperature, make hybrid gasification agent temperature stabilization at 400-500 DEG C, adjust gasification furnace each technological parameter, make discarded object exist Pyrolytic gasification in gasification furnace, gasification furnace atmosphere temperature is stable at 800-900 DEG C, and gasification furnace falls cinder notch blanking, treats pyrolysis of waste Residue after gasifying inclines in laminar flow and required thickness, the i.e. 3/4-1 of laminar flow channel height, using high-temperature burner is accumulated on siege Waste gasification melting furnace fire box temperature is gradually risen with calandria, 1000 DEG C of residues is reached and is started melting, continue to heat up, continued Feed intake to feed hopper, persistently carry out pyrolytic gasification process, while the secondary material-pulling device residue of collecting each air compartment is from discarding Thing sub-inlet feeds, and according to the first exhanst gas outlet synthesis gas componentses, adjusts gasification agent inlet infeed amount and the gasification of melting burner hearth Each technological parameter of stove, temperature is increased to 1400-1600 DEG C, and discarded object is in molten state;
Step C, inorganic waste is set to melt in laminar flow channel;
When molten state slag progresses into laminar flow channel, the side wall calandria control of laminar flow channel ensures laminar flow channel temperature dimension Hold at 1400-1600 DEG C, material is pressed into from inorganic waste entrance using inorganic waste material-pulling device, with high-temperature molten-state slag Contact melting;
Step D, liquid slag water-cooled are solidified into vitreum slag, and crush, deslagging;
Start water-cooling system and vitreum pulverizer, when laminar flow channel is flowed out in the outlet of molten state slag Jing liquid slags, melting Slag obtains water-cooled, forms vitreum slag, drops on vitreum pulverizer and crushes, then falls into water seal slag removing system, Jing slag removers Transport is discharged, and liquid slag water-cooled produces steam, and using steam air exhauster gasifying agent blender is injected, and steam and high temperature air are formed Hybrid gasification agent, from gasification agent inlet melting burner hearth is fed, and hybrid gasification agent also serves as gasification furnace First air and feeds gasification hearth; The condensed water that mixed process is produced returns water-cooling system, and liquid slag Cooling Process produces unnecessary cooling water and is stored in water seal except slag system System, is recycled using back water pump injection water-cooling system;
Step E, treat castoff fusing slag arrange after rolling, close waste gasification melting furnace.
Need to overhaul or during blowing out, fall cinder notch, discarded object sub-inlet and inorganic waste entrance of feed hopper, gasification furnace stops Charging, adjusts each technological parameter of waste gasification melting furnace, treats castoff fusing stream after rolling, closes high-temperature burner and laminar flow The side wall calandria of passage, cleaning circulation air feed system, water-cooled crushing system and water seal slag removing system, closes castoff fusing and consolidates Change processing system.
Finally illustrate, preferred embodiment above is only unrestricted to illustrate technical scheme, although logical Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be In form and in details various changes are made to it, without departing from claims of the present invention limited range.

Claims (8)

1. a kind of waste gasification melting furnace, it is characterised in that:The waste gasification melting furnace includes grate, and in grate On the feed hopper, gasification furnace and the melting and solidification processing system that set gradually along feedstock direction, the melting and solidification processing system position In the lower section of gasification furnace discharge end, the melting and solidification processing system includes melting burner hearth, the layer set gradually along feedstock direction Circulation road, water-cooled crushing system and water seal slag removing system, the melting burner hearth side wall is provided with high-temperature burner, gasifying agent and enters Mouthful, for making from gasification furnace to enter the castoff fusing of melting burner hearth, the laminar flow channel is located at melting burner hearth discharge end lower section, Laminar flow channel bottom is that laminar flow inclines siege, and the water-cooled crushing system includes that water-cooling system, waterway and vitreum are crushed Machine, the waterway is located at laminar flow channel front lower place, and waterway top arranges spray assemblies and steam (vapor) outlet, the water-cooling system The steam that will be produced for the water of water-cooled input spray assemblies, the steam (vapor) outlet output water-cooled, the vitreum pulverizer sets Put in the middle part of waterway, for crushing liquid slag water-cooled after formed vitreum slag, the water seal slag removing system be located at waterway Lower section, water seal slag removing system discharge end connection vitreum slag outlet, the water seal slag removing system be used for seal waterway Lower end, further cools down to vitreum slag, and exports vitreum slag.
2. waste gasification melting furnace according to claim 1, it is characterised in that:The melting burner hearth roof is provided with leads Stream rear arch and baffle pier, make flue gas horizontally enter into gasification hearth, increase the radiating surface of discarded object and the flue gas disturbance of gasification hearth.
3. waste gasification melting furnace according to claim 1, it is characterised in that:The laminar flow inclines siege discharge end and sets Liquid slag height controller is put, the height controller includes baffle plate and the actuator for driving baffle plate flexible.
4. waste gasification melting furnace according to claim 1, it is characterised in that:The laminar flow channel side wall arranges heating Body carries out aiding in heating and insulation.
5. waste gasification melting furnace according to claim 1, it is characterised in that:The grate is provided with discarded object and promotes mainly Glassware, the discarded object promotes mainly glassware positioned at the lower section of feed hopper, for the discarded object in feed hopper to be pushed in gasification furnace, institute State and be provided between feed hopper, gasification furnace windrow seal section, base material material inlet, institute are set on the roof of the windrow seal section Base material material inlet connection base material feeder is stated, the base material feeder is by base material Jing base materials Material inlet pushes windrow seal section.
6. waste gasification melting furnace according to claim 5, it is characterised in that:The moving hearth edge of the gasification furnace is entered Material direction is divided into dryer section, gasification section, and the dryer section of the gasification furnace, gasification section are respectively arranged below with least one and are independently arranged An air compartment, wherein, below dryer section a air compartment is air-supplied, below gasification section a air compartment feed mixing gasifying Agent, the gasification furnace is respectively provided with secondary confession air port in arching upward shape on the face arch of the gasification furnace, rear arch, the gasification furnace Vault arranges the first exhanst gas outlet;
Also including steam air exhauster, for blower fan, gasifying agent blender, the arrival end of the steam air exhauster is by pipeline and water-cooled The steam (vapor) outlet connection of top of chamber, the steam produced in the waterway injects the gasifying agent blender by steam air exhauster An air inlet, the air inlet and atmosphere of the confession blower fan, the gas outlet of the confession blower fan connects the house steward of a manifold, The arm of the manifold respectively with gasifying agent blender another air inlet, gasification furnace dryer section below an air compartment, gasification The secondary confession air port connection of stove, the gasifying agent blender is used for the steam of mixed vapour air exhauster extraction and for blower fan offer Air forms hybrid gasification agent, and the hybrid gasification agent feeds melting burner hearth from gasification agent inlet, and hybrid gasification agent also serves as gas Change an air compartment below stove First air infeed gasification furnace gasification section.
7. waste gasification melting furnace according to claim 6, it is characterised in that:The melting burner hearth is connected with gasification furnace One end be the discarded object main-inlet for melting burner hearth, the melting burner hearth side wall arranges again discarded object sub-inlet, the discarded object Sub-inlet connection discarded object pair material-pulling device, discarded object pair material-pulling device is used to push away the residue of each air compartment in gasification furnace lower section Enter to melt in burner hearth.
8. waste gasification melting furnace according to claim 6, it is characterised in that:The hybrid gasification agent mixed process is produced Raw condensed water is input into water-cooling system by pipeline, and the unnecessary cooling water of the water seal slag removing system injects water-cooled using back water pump System circulation is used.
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JPH08303756A (en) * 1995-05-02 1996-11-22 Chubu Electric Power Co Inc Melting and combustion device
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108036334A (en) * 2017-11-28 2018-05-15 中广核研究院有限公司 Danger wastes method for innocent treatment and device

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