CN108019759A - A kind of refuse disposal system and processing method - Google Patents
A kind of refuse disposal system and processing method Download PDFInfo
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- CN108019759A CN108019759A CN201711455633.1A CN201711455633A CN108019759A CN 108019759 A CN108019759 A CN 108019759A CN 201711455633 A CN201711455633 A CN 201711455633A CN 108019759 A CN108019759 A CN 108019759A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/027—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment pyrolising or gasifying stage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/08—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating
- F23G5/14—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion
- F23G5/16—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having supplementary heating including secondary combustion in a separate combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/027—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using cyclone separators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2204/00—Supplementary heating arrangements
- F23G2204/10—Supplementary heating arrangements using auxiliary fuel
- F23G2204/101—Supplementary heating arrangements using auxiliary fuel solid fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2206/00—Waste heat recuperation
- F23G2206/20—Waste heat recuperation using the heat in association with another installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2900/00—Special features of, or arrangements for incinerators
- F23G2900/50007—Co-combustion of two or more kinds of waste, separately fed into the furnace
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The present invention relates to a kind of refuse disposal system and processing method, including pyrolysis revolving bed, steam generator system and ash melting system, is pyrolyzed on revolving bed and is provided with pyrolysis feed import, the outlet of rubbish charcoal and medium temperature pyrolysis gas exit；Rubbish charcoal burner inlet, pyrolysis gas burner entrance, boiler flue gas outlet, returning charge ash entrance, boiler ash outlet are provided with boiler, the outlet of rubbish charcoal burner inlet connection rubbish charcoal, it is pyrolyzed gas burner entrance connection medium temperature pyrolysis gas exit, boiler smoke import, boiler fly ash outlet and level-one exhanst gas outlet are provided with cyclone separator, boiler smoke inlet communication boiler flue gas outlet, for boiler fly ash outlet to the returning charge valve import of returning charge valve, returning charge valve outlet is connected to the returning charge ash entrance of boiler；Boiler ash outlet ash melting system.The present invention can be used for the garbage disposal of low heat value；Cost is relatively low；Solve the problems, such as that ash content carbon is high in existing treatment technology.
Description
Technical field
The present invention relates to field of garbage disposal, and it is more particularly related to a kind of refuse disposal system and processing method.
Background technology
The traditional trash processing way in China is mostly three kinds of landfill, burning and compost.The common-denominator target of these processing modes
It is by Domestic Waste Minimization, recycling and harmless treatment.
Garbage loading embeading is easy to operate, under can solving rubbish diffusate impurely by establishing high-caliber sanitary landfills factory
Water and soil, dumping produce the secondary environmental pollution problem such as foul smell and inflammable and explosive greenhouse gas methane, but the technology accounts for
Ground area is big, and construction investment is big, and operating cost (including the processing of the landfill of specification, diffusate and methane collection utilize) is high, most
It is limited crucially to fill factory's disposal ability, the new landfill yard of investment construction, further land occupation money are still needed to after taking up one's indentures
Source.
Incineration treatment of garbage is with the obvious advantage in volume reduction, decrement and innoxious degree, and the heat that burning process produces is used for
Power generation can realize the energy of rubbish.It is but improper to the control of burning condition to be led there are smoke pollution (especially bioxin)
Environmental problem is caused, and equipment investment is huge.
Composting technology technique is simple, is suitable for the higher garbage disposal of the perishable content of organic matter, can be to the part in rubbish
Component carries out the utilization of resources, and the simple burning disposal of rubbish output investment ratio for handling phase homogenous quantities substantially reduces.But composting technology
Not putrescible organic matter and inorganic matter cannot be handled, causes volume reduction, decrement and innoxious degree low.Therefore, compost treatment is still
It so cannot thoroughly solve garbage problem.
Refuse pyrolysis is one of technology for being different from above-mentioned conventional process mode.It is by the organic solid castoff in rubbish
Anoxybiotic pyrolysis processing is carried out, not only with splendid spatter property, but also the clean gas of high value can be obtained, is treated at the same time
Produced in journey Wu bioxin and sour gas, be not only suitable for the centralized processing of the house refuse of large size city, and be adapted to medium and small
Type city, the small-scale of house refuse in small towns are flexibly handled.House refuse is also achieved on garbage disposal common-denominator target to subtract
Quantization, recycling and harmless treatment.But pyrolytic process process also generates following problem：
(1) the low flammable matter rubbish charcoal processing of high ash content and the control of processing procedure Zhong bioxin are relatively difficult to achieve；
(2) the dust-laden medium temperature pyrolysis coal gas of high-moisture percentage can not be effectively addressed；
(3) the higher garbage disposal of refuse thermal value is only applicable to, it is necessary to which the calorific value of rubbish is in 6000~10000kcal/kg.
Therefore, the low flammable matter rubbish charcoal of high ash content how is handled, processing high-moisture percentage dust-laden medium temperature is pyrolyzed coal gas, and right
The relatively low garbage disposal of calorific value is this area technical problem urgently to be resolved hurrily.
The content of the invention
The present invention is in view of the above-mentioned problems, purpose is to provide a kind of refuse disposal system and waste disposal method.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
On the one hand the embodiment of the present invention discloses a kind of refuse disposal system, it includes：
Revolving bed is pyrolyzed, is pyrolyzed on revolving bed and is provided with pyrolysis feed import, rubbish charcoal exports and medium temperature pyrolysis coal gas goes out
Mouthful；
Steam generator system, the steam generator system include boiler, cyclone separator and returning charge valve, wherein,
Rubbish charcoal burner inlet, pyrolysis gas burner entrance, boiler flue gas outlet, returning charge are provided with the boiler
Grey entrance, boiler ash outlet, the rubbish charcoal burner inlet connect the rubbish charcoal outlet, the pyrolysis coal gas combustion
Burner entrance connects the medium temperature pyrolysis gas exit,
Boiler smoke import, boiler fly ash outlet and level-one exhanst gas outlet are provided with the cyclone separator, wherein, institute
State boiler flue gas outlet described in boiler smoke inlet communication, the returning charge valve of the boiler fly ash outlet to the returning charge valve into
Mouthful,
The returning charge valve outlet is connected to the returning charge ash entrance of the boiler；
Ash melting system, ash melting system described in the boiler ash outlet.
Further, flue gas waste heat recovery system is further included, the recovered flue gas import of the flue gas waste heat recovery system connects
Lead to the level-one exhanst gas outlet, ash melting system described in the flue gas flying dust outlet of the flue gas waste heat recovery system.
Further, the boiler includes burner hearth, multiple burners is from top to bottom provided with burner hearth, and every kind of described
Burner is two and is oppositely arranged；
The burner from top to bottom includes rubbish charcoal burner and pyrolysis gas burner successively.
Further, the burner further includes coal burner, and the coal burner is arranged on the rubbish charcoal combustion
The top of burner.
Further, the burner includes centre wind swirl channel, the Secondary Air rotation being arranged concentrically successively from inside to outside
Circulation road and periphery wind swirl channel, wherein,
Stove the inner of the centre wind swirl channel, the Secondary Air swirl channel and the periphery wind swirl channel is also set
It is equipped with flameholder.
Further, also set in the centre wind swirl channel, Secondary Air swirl channel and the periphery wind swirl channel
It is equipped with swirl vane.
Further, the flue gas waste heat recovery system includes superheater, steam boiler, the water preheating being linked in sequence successively
Device, flue gas bag filter, chilling device and desulfurizing tower, level-one flue gas described in the recovered flue gas inlet communication of the superheater go out
Mouthful,
The flue gas flying dust of the bag filter is exported is connected to the ash melting system by air-transport system 5
System.
Further, the ash melting system, which includes melting, divides stove, and the molten slag exit for dividing stove connects fast cooling device；
The molten fuel inlet for dividing stove connects the medium temperature pyrolysis gas exit.
Another aspect of the present invention also discloses a kind of waste disposal method, it is characterised in that including：
Step 1) pyrolysis revolving bed after refuse pyrolysis, will obtain rubbish charcoal and medium temperature pyrolysis coal gas；
Step 2) the rubbish charcoal and medium temperature pyrolysis coal gas enter direct combustion in boiler, and the flue gas that direct combustion produces enters rotation
After the separation of wind separator, obtained level-one exhanst gas outlet enters flue gas waste heat recovery system recovery waste heat, obtains boiler fly ash and leads to
Cross returning charge valve to return in boiler, the lime-ash that direct combustion produces, which is sent into melt, divides stove melt process；
The recovered flue gas obtained after step 3) flue gas waste heat recovery carries out Quench processing after bag filter dedusting, right
The molten slag for dividing stove to obtain carries out quenching；
Wherein, the medium temperature pyrolysis coal gas can also be used to be pyrolyzed revolving bed and the molten fuel for dividing stove.
According to the method described in claim 9, it is characterized in that, the boiler uses multiply fuel and multi-staged air eddy flow
Inlet air burns, and coal burner, rubbish charcoal burner and the pyrolysis gas burner arranged on boiler from top to bottom cloth successively
If.
The beneficial effects of the invention are as follows：
The present invention ensures rubbish charcoal and pyrolysis coal gas in stove internal combustion by rubbish charcoal and pyrolysis coal gas direct combustion in boiler
Cinder, influences from refuse thermal value, can be used for the garbage disposal of low heat value, rubbish of the calorific value in 3000-5000kcal/kg also may be used
Handled；Boiler uses dry ash extraction, and more existing whirlwind fusion technology operates more easy to control；Boiler can use air to make
For oxidant, it is not necessary to which extra oxygen-enriched or pure oxygen, cost are relatively low；Ash melting system is set, the lime-ash not burnt is carried out
Deep combustion processing, solves the problems, such as that ash content carbon is high in existing treatment technology.
Brief description of the drawings
Fig. 1 is one embodiment of the invention structure diagram；
Fig. 2 is the boiler structure schematic diagram in further embodiment of this invention；
Fig. 3 is the top view of Fig. 2；
Fig. 4 is the burner structure schematic diagram in further embodiment of this invention.
Wherein：1st, it is pyrolyzed revolving bed, 11, pyrolysis feed import, 12, the outlet of rubbish charcoal, 13, medium temperature pyrolysis gas exit,
14th, fuel inlet, 2, steam generator system, 21, boiler, 211, burner hearth, 212, coal burner, 213, rubbish charcoal burner, 214,
It is pyrolyzed gas burner, 215, water-cooling wall, 216, boiler flue gas outlet, 217, boiler ash outlet, 22, cyclone separator, 23,
Returning charge valve, 3, ash melting system, 31, it is molten divide stove, 32, lime-ash water preheater, 33, air preheater, 4, flue gas waste heat recovery
System, 41, superheater, 42, steam boiler, 43, flue gas water preheater, 44, cooling tower, 45, flue gas ash removal cloth bag device, 46, swash
Device for cooling, 47, desulfurizing tower, 5, air-transport system, 6, nitrogen making machine, 71, centre wind swirl channel, 72, Secondary Air swirl channel,
73rd, periphery wind swirl channel, 74, swirl vane, 75, flameholder.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, one embodiment of the invention discloses a kind of refuse disposal system, it includes：
Revolving bed 1 is pyrolyzed, is pyrolyzed on revolving bed 1 and is provided with pyrolysis feed import 11, rubbish charcoal outlet 12 and medium temperature pyrolysis
Gas exit 13；
Steam generator system 2, the steam generator system 2 include boiler 21, cyclone separator 22 and returning charge valve 23, wherein,
As shown in Figure 2 and Figure 3,213 entrance of rubbish charcoal burner is provided with the boiler, pyrolysis gas burner 214 enters
Mouth, boiler flue gas outlet 216, returning charge ash entrance, boiler ash outlet 217,213 entrance of the rubbish charcoal burner connection
The rubbish charcoal outlet 12,214 entrance of the pyrolysis gas burner connect the medium temperature pyrolysis gas exit 13,
Boiler smoke import, boiler fly ash outlet and level-one exhanst gas outlet are provided with the cyclone separator 22, wherein,
Boiler flue gas outlet 216 described in the boiler smoke inlet communication, the boiler fly ash outlet to the returning charge valve 23
23 import of returning charge valve,
23 outlet of returning charge valve to the boiler returning charge ash entrance；
Ash melting system 3, the 217 connection ash melting system 3 of boiler ash outlet.
The system of the present embodiment can realize rubbish charcoal and pyrolysis coal gas direct combustion in boiler, ensure rubbish charcoal and pyrolyzing coal
Gas is burnt in stove；Boiler uses dry ash extraction, and more existing whirlwind fusion technology operates more easy to control；Boiler can use sky
Gas is as oxidant, it is not necessary to which extra oxygen-enriched or pure oxygen, cost are relatively low；Ash melting system 3 is set, to the lime-ash not burnt
Deep combustion processing is carried out, solves the problems, such as that ash content carbon is high in existing treatment technology, is influenced from refuse thermal value, Ke Yiyong
In the garbage disposal of low heat value, rubbish of the calorific value in 3000-5000kcal/kg can also be handled.
As the preferred of above-described embodiment, as shown in Figure 1, to further improve the utilization rate of the energy, garbage disposal is reduced
Cost, the refuse disposal system further include flue gas waste heat recovery system 4, the recovered flue gas of the flue gas waste heat recovery system 4 into
Mouth connects the level-one exhanst gas outlet, ash melting system described in the flue gas flying dust outlet of the flue gas waste heat recovery system 4
System 3, the heat of boiler smoke is carried out recycling by flue gas waste heat recovery system 4, and by flue gas fly ash carry to ash
Slag fusing system 3, avoids environmental pollution caused by flying dust in flue gas.
The flue gas waste heat recovery system 4 in above-described embodiment, the superheater 41 that can include being linked in sequence successively, steam
Boiler furnace 42, flue gas water preheater 43, flue gas bag filter 45, chilling device 46 and desulfurizing tower 47, the superheater 41
Level-one exhanst gas outlet described in recovered flue gas inlet communication, the flue gas flying dust outlet of the bag filter pass through Geldart-D particle
System connectivity to the ash melting system 3, air-transport system can be connected with nitrogen making machine 6.Come out by cooling tower 44 or other
The boiler water in source passes through flue gas water preheater 43, steam boiler 42 and superheater 41 successively, obtains superheated steam.
In the present embodiment, rubbish charcoal and pyrolysis coal gas exchange heat in residual neat recovering system in the heat smoke that boiler combustion generates and give birth to
Press through hot steam (3.8MPa, 450 DEG C) in production high temperature, available for generating electricity, after heat exchange temperature in 350 DEG C or so of flue gas through flue gas
Quench after the processing such as dedusting or high-temperature filter, the bioxin for avoiding boiler combustion process decomposition are secondary again at 300 DEG C or so
Into can obviously reduce the content of dioxin in flue gas.
In another embodiment of the present invention, such as Fig. 2, shown in Fig. 3, the boiler in above-described embodiment includes burner hearth 211, in stove
Multiple burners are from top to bottom provided with thorax 211, and every kind of burner for two and is oppositely arranged, to realize opposed combustion
Burn；The burner from top to bottom includes rubbish charcoal burner 213 and pyrolysis gas burner 214 successively.It is preferred that hearth outer wall
It is additionally provided with water-cooling wall 215.
As the preferred of above-described embodiment, the burner further includes coal burner 212, the coal burner 212
It is arranged on the top of the rubbish charcoal burner 213.
In the present embodiment, coal burner 212, rubbish charcoal burner 213 and pyrolysis gas burner 214 are along burner hearth 211
Axial direction is based on following purpose using this arrangement：Pyrolysis gas burner 214 is in boiler orlop and carries out burning generation
High warm flue gas is flowed up along boiler furnace 211；Coal burner 212 is in boiler topmost and carries out burning as spare,
Purpose first of all for the low flammable matter rubbish charcoal of the unburned complete high ash content of further after-flame, secondly for boiler furnace lifting and because
The change of rubbish charcoal combustion position maintains 211 temperature of burner hearth spare.Rubbish charcoal burner 213 is in coal burner 212 and pyrolysis
Between gas burner 214, the low flammable matter rubbish charcoal of high ash content enters burner hearth 211, burner by burner with cyclone mode
The outlet gas flow forming part of charcoal containing rubbish divides negative pressure, by hot cigarette caused by the dust-laden medium temperature pyrolysis gas-fired of lower part high-moisture percentage
Gas, which is involved in rubbish charcoal air-flow, carries out preheated burning.Coal burner 212, rubbish charcoal burner 213 and pyrolysis gas burner
214 are using opposed form in 211 front wall of boiler furnace and rear wall, ensure to be heated evenly in burner hearth 211, avoid the temperature of burner hearth 211
Spend skewness；Meanwhile two the torch that sprays of burner on furnace wall hit mutually in the center of burner hearth 211 after, flame is most of
To 211 upper direction of burner hearth, the flame full level in stove is preferable, and perturbation is also relatively strong, promotes full combustion of fuel.
In another embodiment of the present invention, as shown in figure 4, to be further ensured that the adequacy of burning, efficiency of combustion is improved,
The structure of the burner includes centre wind swirl channel 71,72 and of Secondary Air swirl channel being arranged concentrically successively from inside to outside
Periphery wind swirl channel 73, wherein,
In the stove of the centre wind swirl channel 71, the Secondary Air swirl channel 72 and the periphery wind swirl channel 73
End is additionally provided with flameholder 75.
To further improve the eddy flow degree of burner inlet air, it is preferable that the centre wind swirl channel 71, Secondary Air rotation
Swirl vane 74 is additionally provided with circulation road 72 and the periphery wind swirl channel 73.
In the present embodiment, coal dust, rubbish charcoal and pyrolysis coal gas are burnt using multistage inlet air turbulent burner, are entered
The air of burner is divided into centre wind, Secondary Air and periphery wind in different air distribution ratios, they are entered not with cyclone mode respectively
Same passage, while swirl vane 74 is installed respectively to strengthen air-flow swirl strength in respective passage.Coal dust, rubbish charcoal and pyrolysis
Coal gas is also classified into multiply to be held under the arm to be brought into respective passage and is premixed and in boiler by centre wind, Secondary Air and periphery wind respectively
Burn.In order to ensure that combustion flame is stablized, flameholder 75 is set in the outlet of burner.Multiply fuel (coal dust, rubbish
Rubbish charcoal and pyrolysis coal gas) and multi-staged air eddy flow inlet air ensure that the uniformity of fuel and air distribution, effectively improve rubbish charcoal and
With medium temperature pyrolysis coal gas efficiency of combustion and flame holding, for the low flammable matter rubbish charcoal of high ash content and with high-moisture percentage
The pyrolysis gas-fired of dust-laden medium temperature is more effective.
In another embodiment of the present invention, the ash melting system 3, which includes melting, divides stove 31, the molten slag for dividing stove 31
Outlet fast cooling device；The molten fuel inlet 14 for dividing stove 31 connects the medium temperature pyrolysis gas exit 13, it is preferable that molten
Divide the flue gas of stove to be sequentially communicated to lime-ash water preheater 32 and air preheater 33, realize the molten recycling for dividing furnace flue gas exhaust heat.
For above-described embodiment when carrying out refuse pyrolysis, rubbish charcoal and pyrolysis coal gas carry out 900~950 in steam generator system 2
DEG C burning, the temperature, to control stove in bioxin than advantageous, this is because can both have been avoided in this temperature range
Decomposition bioxin generates again, and can also meet rubbish charcoal, coal dust and medium temperature pyrolysis wet gas burns temperature, while avoids rubbish
Ash content high-temperature fusion in rubbish charcoal and coal dust.It is different from whirlwind melting on combustion system at the same time, its combustion process uses direct combustion
Form, in stove Combustion System coefficient of excess air in 1.1~1.3 or so, boiler operating gas velocity control in 3.5~5.0m/s,
Control coefficient of excess air can both ensure rubbish charcoal and sufficient oxygen amount needed for pyrolysis gas-fired in this scope, also avoid excess
Air coefficient is excessive to cause flue gas loss excessive；Operating gas velocity is in this scope in control boiler, it is ensured that rubbish charcoal and pyrolysis
The time required to coal gas is burnt in stove.Rubbish charcoal and pyrolysis gas boiler deslagging mode use dry ash extraction, and skill is melted compared with whirlwind
Art is easily controllable in operation, and boiler load can be adjusted in the range of 60~110%, and boiler combustion process uses air as oxidation
Agent, it is not necessary to use oxygen-enriched or pure oxygen.Meanwhile as rubbish charcoal still had in boiler it is uncombusted cause ash content carbon higher,
It can also be melted in follow-up lime-ash and deep combustion processing is carried out in point stove 31, solve the problems, such as that ash content carbon is high.
On the grey Slag treatment of ash melting system 3, congruent melting in stove 31 is divided to melt molten using solid boiler ash and flying dust
Batch process or continuous operation processing, different from the direct slag tap of high-temp combustion of the prior art, have on the melting time
Controllability, its melting time can be controlled in 10min~60min, and lime-ash and flying dust characteristic determine it under certain melting temperature
Melting time；Lime-ash and fusing fly ash temperature control are conducive to ash at 1350~1500 DEG C in 1350~1500 DEG C of high temperature
Slag and flying dust Nei bioxin can obtain effective pyrolytic.Carry out chilling is then carried out to above-mentioned high-temperature slag, ensure that ash
Zha bioxin meet the requirement of environmental protection, this is because quenching two can effectively avoid pyrolytic after bioxin on 300 DEG C of left sides
The right side generates again.
On the basis of above-described embodiment, rubbish is carried out using above-mentioned refuse disposal system the invention also discloses a kind of
The method of processing, this method include：
Step 1) pyrolysis revolving bed after refuse pyrolysis, will obtain rubbish charcoal and medium temperature pyrolysis coal gas；
Step 2) the rubbish charcoal and medium temperature pyrolysis coal gas enter direct combustion in boiler, and the flue gas that direct combustion produces enters rotation
After the separation of wind separator, obtained level-one exhanst gas outlet enters flue gas waste heat recovery system recovery waste heat, obtains boiler fly ash and leads to
Cross returning charge valve to return in the country, the lime-ash that direct combustion produces, which is sent into melt, divides stove melt process；
The recovered flue gas obtained after step 3) flue gas waste heat recovery carries out Quench processing after bag filter dedusting, right
The molten slag for dividing stove to obtain carries out quenching；
Wherein, the medium temperature pyrolysis coal gas can also be used to be pyrolyzed revolving bed and the molten fuel for dividing stove.
To realize the adequacy burnt in boiler and direct combustion efficiency, the boiler uses multiply fuel and multi-staged air eddy flow
Inlet air burns, and coal burner, rubbish charcoal burner and the pyrolysis gas burner arranged on boiler from top to bottom cloth successively
If.
Embodiment 1
A kind of waste disposal method, garbage raw material directly enters pyrolysis revolving bed by pyrolysis feed import and is pyrolyzed, raw
Output medium temperature is pyrolyzed coal gas and rubbish charcoal, medium temperature pyrolysis gas exit and the outlet of rubbish charcoal and the pyrolysis gas-fired of steam generator system
Device import, rubbish charcoal combustor inlet are connected, into steam generator system；Meanwhile medium temperature pyrolysis gas exit is also respectively connected with rubbish
The fuel inlet and the molten fuel inlet for dividing stove of rubbish pyrolysis revolving bed, can be used as refuse pyrolysis revolving bed to divide stove to maintain furnace temperature with molten
Fuel use.
In steam generator system, medium temperature pyrolysis coal gas and rubbish charcoal carry out direct combustion, boiler flue gas outlet and cyclone separator
Boiler smoke import is connected, and the flying dust collected by flue gas cyclone separator is exported through boiler fly ash to be connected with returning charge valve import
Connect, into returning charge valve, flying dust returning charge valve outlet is connected with boiler returning charge ash entrance；Flue gas cyclone separator level-one flue gas goes out
Mouth is connected with the recovered flue gas import of superheater, and superheater exhanst gas outlet is connected with steam boiler smoke inlet, steam copper
Kiln gas outlet is connected with water preheater gas inlet, and water preheater exhanst gas outlet is connected with flue gas bag-type dust gas inlet
Connect, bag-type dust exhanst gas outlet is connected with desulfurizing tower gas inlet, and flue gas after desulfurization outside desulfurizing tower exhanst gas outlet through arranging.In ash
In slag fusing system, the flue gas flying dust outlet of flue gas bag filter divides stove import to be connected by air-transport system with molten,
The outlet of steam generator system lime-ash divides stove import to be connected by Ash water equipment with molten.
Embodiment 2
Rubbish produced after being pyrolyzed in 400~600 DEG C of pyrolysis revolving bed 500 DEG C or so pyrolysis coal gas (~
4000kcal/Nm3) and rubbish charcoal (~1400kcal/kg).Pyrolysis rubbish charcoal after cooling and 500 DEG C or so medium temperature pyrolysis
Coal gas enters steam generator system, rubbish charcoal burner and pyrolysis coal gas combustion by rubbish charcoal burner and pyrolysis gas burner respectively
Centre wind, Secondary Air and periphery wind air distribution volume ratio are 5 in burner:3:2, fuel mass proportioning is 4:2:1.In steam generator system
In, rubbish charcoal and medium temperature pyrolysis wet gas carry out direct combustion in 900~950 DEG C of temperature ranges；When raw material rubbish charcoal calorific value changes
When, it can open that coal burner is combustion-supporting or adjustment steam generator system rubbish charcoal inlet amount etc. maintains boiler temperature at 900~950 DEG C
Temperature range, effectively controls the generation of stove Nei bioxin.Combustion process produce~800 DEG C of lime-ash through furnace bottom slag cooler cooling after it is defeated
Send to molten and divide stove raw material cabin；Boiler combustion generates~900 DEG C of flue gases through mistake of the flue gas waste heat recovery system production available for power generation
Hot steam (3.8MPa, 450 DEG C), after heat exchange~350 DEG C of heat smoke is through bag-type dust (or high-temperature filter etc.) Quench desulfurization
Outer row is carried out after purified treatment, avoids bioxin generation again in flue gas.The low temperature flying dust that flue gas waste heat recovery system is collected
Being sent through nitrogen air-transport system to molten divides stove raw material cabin to be reprocessed.Furnace bottom cools down lime-ash and Geldart-D particle conveys flying dust
Divide in 1350~1500 DEG C of high temperature meltings in stove and carry out melting and slag quenching, it is ensured that Rong Zha bioxin meets that environmental protection will
Ask ,~1400 DEG C of high warm flue gas outer row after water preheater and air preheater.
In conclusion refuse disposal system disclosed in this invention and waste disposal method, at least have following beneficial to effect
Fruit：
(1) garbage disposal of low heat value (calorific value is in 3000~5000kcal/kg) can be effectively carried out, while is also applied for height
The garbage disposal of calorific value (calorific value is in~10000kcal/kg)；
(2) solve revolving bed refuse pyrolysis process and produce the low flammable matter rubbish charcoal of the high ash content of waste of low heating value pyrolysis production
Caused solid waste problem；
(3) the dust-laden medium temperature pyrolyzing coal gas disposal of the low flammable matter rubbish charcoal of high ash content and high-moisture percentage is effectively controlled
Journey Zhong bioxin control problems.
The foregoing is merely presently preferred embodiments of the present invention, is not used for limiting practical range of the invention；If do not take off
From the spirit and scope of the present invention, to technical scheme is modified or replaced equivalently of the present invention, should all cover in the claims in the present invention
Among protection domain.
Claims (10)
- A kind of 1. refuse disposal system, it is characterised in that including：Revolving bed is pyrolyzed, is pyrolyzed on revolving bed and is provided with pyrolysis feed import, the outlet of rubbish charcoal and medium temperature pyrolysis gas exit；Steam generator system, the steam generator system include boiler, cyclone separator and returning charge valve, wherein,Rubbish charcoal burner inlet, pyrolysis gas burner entrance, boiler flue gas outlet, returning charge ash is provided with the boiler to enter Mouth, boiler ash outlet, the rubbish charcoal burner inlet connect the rubbish charcoal outlet, the pyrolysis gas burner Entrance connects the medium temperature pyrolysis gas exit,Boiler smoke import, boiler fly ash outlet and level-one exhanst gas outlet are provided with the cyclone separator, wherein, the pot Boiler flue gas outlet described in kiln gas inlet communication, the returning charge valve import of the boiler fly ash outlet to the returning charge valve,The returning charge valve outlet is connected to the returning charge ash entrance of the boiler；Ash melting system, ash melting system described in the boiler ash outlet.
- 2. system according to claim 1, it is characterised in that further include flue gas waste heat recovery system, the fume afterheat Level-one exhanst gas outlet described in the recovered flue gas inlet communication of recovery system, the flue gas flying dust outlet of the flue gas waste heat recovery system Connect the ash melting system.
- 3. system according to claim 1, it is characterised in that the boiler includes burner hearth, from top to bottom set on burner hearth Multiple burners are equipped with, and every kind of burner for two and is oppositely arranged；The burner from top to bottom includes rubbish charcoal burner and pyrolysis gas burner successively.
- 4. system according to claim 3, it is characterised in that the burner further includes coal burner, the coal dust Burner is arranged on the top of the rubbish charcoal burner.
- 5. the system according to claim 3 or 4, it is characterised in that the burner includes setting with one heart successively from inside to outside Centre wind swirl channel, Secondary Air swirl channel and the periphery wind swirl channel put, wherein,Stove the inner of the centre wind swirl channel, the Secondary Air swirl channel and the periphery wind swirl channel is additionally provided with Flameholder.
- 6. system according to claim 5, it is characterised in that the centre wind swirl channel, Secondary Air swirl channel and Swirl vane is additionally provided with the periphery wind swirl channel.
- 7. system according to claim 2, it is characterised in that the flue gas waste heat recovery system includes being linked in sequence successively Superheater, steam boiler, water preheater, flue gas bag filter, chilling device and desulfurizing tower, the recycling cigarette of the superheater Level-one exhanst gas outlet described in gas inlet communication,The flue gas flying dust of the bag filter is exported is connected to the ash melting system by air-transport system 5.
- 8. system according to claim 1, it is characterised in that the ash melting system, which includes melting, divides stove, described molten point The slag exit connection fast cooling device of stove；The molten fuel inlet for dividing stove connects the medium temperature pyrolysis gas exit.
- A kind of 9. waste disposal method, it is characterised in that including：Step 1) pyrolysis revolving bed after refuse pyrolysis, will obtain rubbish charcoal and medium temperature pyrolysis coal gas；Step 2) the rubbish charcoal and medium temperature pyrolysis coal gas enter direct combustion in boiler, and the flue gas that direct combustion produces divides into whirlwind After being separated from device, obtained level-one exhanst gas outlet enters flue gas waste heat recovery system recovery waste heat, obtains boiler fly ash by returning Expect that valve is returned in the country, the lime-ash feeding that direct combustion produces is molten to divide stove melt process；The recovered flue gas obtained after step 3) flue gas waste heat recovery carries out Quench processing after bag filter dedusting, to molten point The slag that stove obtains carries out quenching；Wherein, the medium temperature pyrolysis coal gas can also be used to be pyrolyzed revolving bed and the molten fuel for dividing stove.
- 10. according to the method described in claim 9, it is characterized in that, the boiler uses multiply fuel and multi-staged air eddy flow Inlet air burns, and coal burner, rubbish charcoal burner and the pyrolysis gas burner arranged on boiler from top to bottom cloth successively If.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455633.1A CN108019759A (en) | 2017-12-28 | 2017-12-28 | A kind of refuse disposal system and processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711455633.1A CN108019759A (en) | 2017-12-28 | 2017-12-28 | A kind of refuse disposal system and processing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425540A (en) * | 2019-08-30 | 2019-11-08 | 西安西热锅炉环保工程有限公司 | A kind of pulverized-coal fired boiler mixes the system and method for burning rubbish |
| CN111649335A (en) * | 2020-06-13 | 2020-09-11 | 宁波世茂能源股份有限公司 | Waste incineration power generation system and process |
| CN112080294A (en) * | 2020-09-01 | 2020-12-15 | 武汉重远炉窑工程技术服务有限公司 | Heating device for coking chamber of coke oven |
-
2017
- 2017-12-28 CN CN201711455633.1A patent/CN108019759A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425540A (en) * | 2019-08-30 | 2019-11-08 | 西安西热锅炉环保工程有限公司 | A kind of pulverized-coal fired boiler mixes the system and method for burning rubbish |
| CN111649335A (en) * | 2020-06-13 | 2020-09-11 | 宁波世茂能源股份有限公司 | Waste incineration power generation system and process |
| CN111649335B (en) * | 2020-06-13 | 2023-03-28 | 宁波世茂能源股份有限公司 | Waste incineration power generation system and process |
| CN112080294A (en) * | 2020-09-01 | 2020-12-15 | 武汉重远炉窑工程技术服务有限公司 | Heating device for coking chamber of coke oven |
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