CN109185887A - A kind of house refuse coupling desiccation pyrolysis processing technique and processing system - Google Patents
A kind of house refuse coupling desiccation pyrolysis processing technique and processing system Download PDFInfo
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- CN109185887A CN109185887A CN201811074538.1A CN201811074538A CN109185887A CN 109185887 A CN109185887 A CN 109185887A CN 201811074538 A CN201811074538 A CN 201811074538A CN 109185887 A CN109185887 A CN 109185887A
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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
- F23G5/006—General arrangement of incineration plant, e.g. flow sheets
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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
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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
- F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
- F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
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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
- F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
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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
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/10—Drying by heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/30—Pyrolysing
- F23G2201/302—Treating pyrosolids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/30—Pyrolysing
- F23G2201/303—Burning pyrogases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/40—Gasification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2201/00—Pretreatment
- F23G2201/80—Shredding
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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
- F23G2206/10—Waste heat recuperation reintroducing the heat in the same process, e.g. for predrying
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of house refuse coupling desiccation pyrolysis processing technique and processing system, which includes the following steps: that 1) house refuse is by broken, magnetic separation pretreatment；2) then pass through biological heat Air Coupling drying and other treatment；3) again through pyrolysis gasification furnace pyrolytic gasification；4) pyrolysis generation fuel gas enters dual firing chamber's progress second-time burning；5) second-time burning generates high-temperature flue gas through rapid-cooling heat exchanger；6) flue gas carries out heat exchange through air preheater and air after exchanging heat；7) last flue gas is handled through exhaust treatment system discharges.The processing system includes crushing-magnetic selection equipment, biological heat Air Coupling drying and other treatment equipment, pyrolysis gasification furnace, dual firing chamber, rapid-cooling heat exchanger, air preheater, exhaust treatment system and chimney.The present invention has the advantages that domestic garbage pyrolysis treatment effeciency is high, and refuse pyrolysis gasification stability is high, and process control is strong, and vent gas treatment difficulty is small, can be widely applied to application of city life garbage pyrolysis processing technical field.
Description
Technical field
The invention belongs to technical field of domestic garbage treatment, specifically a kind of house refuse couples desiccation pyrolysis processing technique
And processing system.
Background technique
With the continuous improvement of living standards of the people, the content of organics in house refuse is more and more, and rubbish is aqueous
Rate is higher.Because of complicated component in house refuse, processing difficulty is big, if dealt with improperly, may cause serious secondary pollution.Closely
Nian Lai, with the reinforcement of environmental consciousness and the successive appearance of increasingly strict national environmental protection regulation and policy, Disposal of Domestic
" innoxious, minimizing and recycling " have become the basic principle that various countries follow, refuse pyrolysis technology is as realizing that this is former
One of effective way then has gradually obtained industry and has generally acknowledged.
Existing domestic garbage pyrolysis treatment process is generally divided into without dry pretreatment and has dry pretreatment pyrolysis processing
Two class of technique.Pyrolysis processing workshop section, which tool are directly entered without dry pretreating waste pyrolysis processing technique, that is, house refuse
Have that process flow is simple, but pyrolysis oven is controlled and requires high, is difficult to stablize there are operating condition, the problems such as vent gas treatment is difficult.
There is dry pretreating waste pyrolysis processing technique i.e. house refuse to reach certain journey (generally using revolving drum drying) by dry
Enter pyrolysis processing workshop section after degree, which house refuse enters before pyrolysis oven by drying, and pyrolysis efficiency improves, and is pyrolyzed air water
Point reduce, operating condition stability improve, but increase investment, it is excessive there are drying section foul smell the problems such as.Such as: the number of applying for a patent
The patent of invention of " a kind of house refuse heat source combined drying technique " is disclosed for 201610492104.8 Chinese patent.This
Outside, there is also following common problems for the domestic garbage pyrolysis treatment process that above two class is commonly used: 1. entering pyrolysis gas
It is high to change furnace house refuse moisture content, the dry house refuse of amount of heat need to be consumed, dryer section thickness increases, and directly affects pyrolysis gas
Change efficiency and dual firing chamber's combustion efficiency；2. too high oxygen level in flue gas directly affects smoke emissioning concentration, inhibit dioxin synthesis
Effect is poor.
Summary of the invention
The technical problem to be solved by the present invention is to a kind of house refuses to couple desiccation pyrolysis processing technique and processing system,
By introducing biological heat Air Coupling drying process, optimizes pyrolysis system and tail gas treatment process, realize that house refuse is efficiently done
Change and effectively controlled with oxygen content in tail gas, effectively improves refuse pyrolysis treatment effeciency and control secondary pollution and the discharge of tail gas,
To reduce equipment investment and O&M cost, the innoxious and minimizing processing of house refuse is realized.
The present invention solves above-mentioned technical problem with following technical solution:
House refuse of the present invention couples desiccation pyrolysis processing technique, including following operating procedure:
(1) house refuse that moisture content is 45%~60% is pre-processed through broken, magnetic separation, makes broken rubbish partial size
For 20~50mm, the metallics that magnetic separation is isolated is recycled；
(2) broken house refuse is subjected to biological heat Air Coupling drying and other treatment, the house refuse after coupling desiccation
Moisture content is less than 20%；
(3) house refuse after desiccation is uniformly sent into pyrolysis gasification furnace and carries out pyrolytic gasification, the pyrolysis temperature 600 of use
~800 DEG C, pyrolysis generates fuel gas and lime-ash, by lime-ash outlet；
(4) fuel gas for generating pyrolysis is sent into dual firing chamber and carries out second-time burning, and dual firing chamber's temperature is 850~1100
℃；
(5) part high-temperature flue gas is sent into chilling to pyrolysis gasification furnace by the high temperature gases recirculating for generating part dual firing chamber
Heat exchanger carries out heat exchange processing, and flue-gas temperature is made to be reduced to 200~225 DEG C in 2s, and will change thermogenetic thermal energy outlet benefit
With；
(6) flue gas after heat exchange is subjected to heat exchange through air preheater and air, flue-gas temperature is reduced to 160 DEG C；
(7) finally flue gas is handled through exhaust treatment system, to reach " consumer waste incineration contamination control standard "
(GB18485-2014) emission limit requirement, through smoke stack emission.
In step (2), in the biological heat Air Coupling drying and other treatment, biological dewatered treatment temperature is 61~75 DEG C, raw
Object drying time 5~7 days；The hot-air desiccation temperature used is 90~110 DEG C, hot-air drying time 0.5~1 day.
In step (2), the tail gas that coupling drying and other treatment is generated is after demisting as the primary air of pyrolysis gasification furnace.
In step (4), the fuel gas is 2~3s in the residence time of dual firing chamber.
In step (6), temperature is heated to 90~110 DEG C after air preheater and flue gas carry out heat exchange by air, and
Heat source as biological heat Air Coupling drying and other treatment.
The processing system that house refuse coupling desiccation pyrolysis processing technique of the present invention uses, including be sequentially connected from front to back
Crushing-magnetic selection equipment, the biological heat Air Coupling drying and other treatment equipment, pyrolysis gasification furnace, dual firing chamber, rapid-cooling heat exchanger, air connect
Preheater, exhaust treatment system and chimney；It is between crushing-magnetic selection equipment and biological heat Air Coupling drying and other treatment equipment and raw
Object hot-air is coupled and is connected respectively by screw conveyor between drying and other treatment equipment and pyrolysis gasification furnace, and dual firing chamber is set to heat
It solves the outside of gasification furnace and one is made, be connected between pyrolysis gasification furnace and dual firing chamber by gas port, dual firing chamber and chilling
Between heat exchanger, between rapid-cooling heat exchanger and air preheater, between air preheater and exhaust treatment system and at tail gas
It is connected by offgas duct between reason system and chimney, the offgas duct for connecting exhaust treatment system and chimney is equipped with air inducing
Machine.
The crushing-magnetic selection equipment is made of crusher and magnetic separator, and the crusher uses shearing double-shaft crusher.
The biological heat Air Coupling drying and other treatment equipment includes shell, set gradually from the bottom to top in shell cloth gas-bearing formation,
Supporting layer, desiccation layer, the cloth gas-bearing formation include air gas distribution pipe and hot wind gas distribution pipe, and the supporting layer is made of supporting plate, holds
Air distribution outlet is evenly equipped on supporting plate, the desiccation layer is located at the top of supporting layer, for place through crushing-magnetic selection treated life
Rubbish, and temperature-detecting device and oxygen content detector are equipped in desiccation layer.
The headspace of the biological heat Air Coupling drying and other treatment equipment is sent through air duct to pyrolysis gasification furnace, air duct
On air blower is installed；The hot wind gas distribution pipe connects hot air pipe, Base top contact of the hot air pipe from air preheater, air preheat
The bottom of device and air cloth tracheae connect air blower by the road respectively.
The part hot gas of the dual firing chamber leads back pyrolysis gasification furnace as domestic garbage pyrolysis primary air, portion through return pipe
Hot gas is divided to be delivered to rapid-cooling heat exchanger through offgas duct.
The invention has the following beneficial effects:
1. the method for the present invention is by the way that by house refuse biological heat Air Coupling desiccation, it is raw to enter pyrolysis gasification furnace for effectively control
Msw water content living, low energy consumption for desiccation, substantially increases domestic garbage pyrolysis efficiency.
2. the method for the present invention by coupling desiccation control domestic garbage pyrolysis gasification oven primary air oxygen content, reduce into
Enter coefficient of excess air in pyrolysis oven, effectively controls dioxin synthesis, reduce fume treatment cost.
3. processing system of the present invention has, domestic garbage pyrolysis treatment effeciency is high, refuse pyrolysis gasification stability is high, process
The advantages such as controllability is strong, pollutant concentration is low, vent gas treatment difficulty is small, operating cost is low, can be widely applied to urban life rubbish
Rubbish pyrolysis processing technical field.
Detailed description of the invention
Fig. 1 is the flow chart of house refuse coupling desiccation pyrolysis processing technique of the present invention.
Fig. 2 is the structural schematic diagram of house refuse coupling desiccation pyrolysis treatment systems of the present invention.
Fig. 3 is the schematic view of facade structure of biological heat Air Coupling drying and other treatment equipment in Fig. 2.
Fig. 4 is the schematic top plan view of supporting plate in Fig. 3.
In figure: 1- shell, 2- supporting plate, 3- air gas distribution pipe, 4- hot wind gas distribution pipe, 5- cloth stratification of wind, 6- desiccation layer, 7- heat
Air valve, 8- air door, 9- air distribution outlet, 10- crushing-magnetic selection equipment, 11- screw conveyor one, 12- biological heat Air Coupling
Drying and other treatment equipment, 13- air hose, 14- screw conveyor two, 15- pyrolysis gasification furnace, 16- dual firing chamber, 17- gas port, 18-
Return pipe, 19- offgas duct one, 20- rapid-cooling heat exchanger, 21- offgas duct two, 22- air preheater, 23- offgas duct three, 24- tail
Gas processing system, 25- offgas duct four, 26- air-introduced machine, 27- offgas duct five, 28- chimney, 29- air blower one, 30- hot air pipe,
31- air blower two, 32- air duct, 33- air blower three.
Specific embodiment
Technical scheme of the present invention will be further described with reference to the accompanying drawings and embodiments, but protection scope is unlimited
This.
As shown in Figure 1, house refuse of the present invention couples desiccation pyrolysis processing technique, following operating procedure is specifically included:
(1) house refuse (moisture content 45%~60%) is pre-processed by crusher, magnetic separator, rubbish partial size after being crushed
20~50mm is sent into garbage feeding pond, is then recycled metallics separation by magnetic separator；
(2) broken house refuse is sent into biological heat Air Coupling drying and other treatment equipment and carries out biological heat Air Coupling
Drying and other treatment, biological dewatered temperature are 61~75 DEG C, 5~7 days biological dewatered time；Hot-air desiccation temperature is 90~110 DEG C,
Hot-air drying time 0.5~1 day, house refuse moisture content was less than 20% after coupling desiccation, desiccation final vacuum oxygen content 15%
~18%；
(3) by house refuse after desiccation be uniformly sent into pyrolysis gasification furnace carry out pyrolytic gasification, 600~800 DEG C of pyrolysis temperature,
Pyrolysis generates fuel gas and lime-ash, by lime-ash outlet；
(4) fuel gas that pyrolysis generates enters progress second-time burning, dual firing chamber's temperature in dual firing chamber by gas operated device
Control is 850~1100 DEG C, and part second-time burning is generated high temperature gases recirculating to pyrolysis gasification furnace, is provided for pyrolysis gasification furnace
Partial heat；
(5) part second-time burning being generated into high-temperature flue gas through rapid-cooling heat exchanger, flue-gas temperature is reduced to 200 in 2s~
225 DEG C, it is available that heat exchange generates thermal energy；
(6) flue gas carries out heat exchange through air preheater and air after exchanging heat, and flue-gas temperature is reduced to 160 DEG C；
(7) last flue gas is handled through exhaust treatment system, to reach " consumer waste incineration contamination control standard "
(GB18485-2014) emission limit requirement, through smoke stack emission；
In step (6), air carries out heat exchange through air preheater and flue gas, and air themperature is heated to 90~110 DEG C, heat
Air can be used as the heat source of biological heat Air Coupling drying and other treatment equipment；
In step (2), coupling drying tail gas oxygen content is 15%~18%, as the primary of pyrolysis gasification furnace after demisting
Air.
For the above-mentioned preparation process of implementation, processing system shown in Fig. 2-4 can be used:
As shown in Fig. 2-4, house refuse of the present invention couples desiccation pyrolysis treatment systems, including is sequentially connected from front to back
The crushing-magnetic selection equipment 10 that connects, biological heat Air Coupling drying and other treatment equipment 12, pyrolysis gasification furnace 15, dual firing chamber 16, chilling change
Hot device 20, air preheater 22, exhaust treatment system 24 and chimney 28；Crushing-magnetic selection equipment 10 and the desiccation of biological heat Air Coupling
It is connected between processing equipment 12 by screw conveyor 1, biological heat Air Coupling drying and other treatment equipment 12 and pyrolysis gasification furnace
It is connected between 15 by screw conveyor 2 14, dual firing chamber 16 is arranged in the outside of pyrolysis gasification furnace 15, and is made with dual firing chamber 16
One is connected, between dual firing chamber 16 and rapid-cooling heat exchanger 20 by gas port 17 between pyrolysis gasification furnace 15 and dual firing chamber 16
It is connected through offgas duct 1, is connected between rapid-cooling heat exchanger 20 and air preheater 22 through offgas duct 2 21, air preheat
It is connected between device 22 and exhaust treatment system 24 through offgas duct 3 23, the outlet of exhaust treatment system 24 connects through offgas duct 4 25
Air-introduced machine 26 is connect, air-introduced machine 26 connects chimney through offgas duct 5 27.
As Figure 2-3, the biological heat Air Coupling drying and other treatment equipment 12 includes shell 1, in shell 1 by down toward
On set gradually cloth gas-bearing formation 5, supporting layer, desiccation layer 6, the cloth gas-bearing formation 5 includes air gas distribution pipe 3 and hot wind gas distribution pipe 4, air
It is provided with air door 8 on gas distribution pipe 3, Hot-blast valve 7 is provided on hot wind gas distribution pipe 4；The supporting layer is by 2 groups of supporting plate
At being evenly equipped with air distribution outlet 9 on supporting plate 2, the desiccation layer 6 is located at the top of supporting layer, handles for placing through crushing-magnetic selection
House refuse afterwards, and temperature-detecting device and oxygen content detector (not shown) are equipped in desiccation layer.
The headspace of biological heat Air Coupling drying and other treatment equipment of the present invention is sent through air duct 32 to pyrolytic gasification
Furnace 15 is equipped with air blower 2 31 in air duct 32；The hot wind gas distribution pipe 4 connects hot air pipe 30, and hot air pipe 30 is pre- from air
The Base top contact of hot device 22, the bottom of air preheater 22 connect air blower 1 by the road, and air gas distribution pipe 3 is through air hose 13
Connect air blower 3 33.
Crushing-magnetic selection equipment 10 of the present invention is made of crusher and magnetic separator, and the crusher can be used shearing double
Axis crusher, when work, can be first be crushed after magnetic separation, be crushed after being also possible to first magnetic separation.
The part hot gas of dual firing chamber 15 of the present invention leads back pyrolysis gasification furnace 15 as house refuse heat through return pipe 18
Primary air is solved, part hot gas is delivered to rapid-cooling heat exchanger 20 through offgas duct 1.
When work, house refuse is sent into biological heat Air Coupling drying and other treatment equipment 12, warp after broken, magnetic separation pretreatment
Enter the progress pyrolytic gasification of domestic garbage pyrolysis gasification oven 15 after coupling desiccation, the fuel gas for being pyrolyzed generation passes through gas port 17
Into dual firing chamber 16, dual firing chamber 16 generates high-temperature flue gas and is partly refluxed to pyrolysis gasification furnace 15, partially through rapid-cooling heat exchanger 20, sky
Air preheater 22 enter after exchanging heat exhaust treatment system 24 (exhaust treatment system can using common injection calcium lime powder/
Active carbon+bag filter processing system), so that flue gas is reached " consumer waste incineration contamination control standard " (GB18485-2014)
Emission limit requirement, finally discharged under the action of air-introduced machine 26 through chimney 28.Air through air preheater 22 and flue gas into
Row heat exchange, hot-air are used as domestic garbage pyrolysis as coupling desiccation heat source, coupling drying tail gas oxygen content 15%~18%
Primary air.
Compared with existing system, processing system of the present invention has domestic garbage pyrolysis treatment effeciency height, refuse pyrolysis gasification
The advantages such as stability is high, process control is strong, pollutant concentration is low, vent gas treatment difficulty is small, operating cost is low, can be widely applied
In application of city life garbage pyrolysis processing technical field.
It is the application example using present invention process processing below:
Example 1
House refuse is crushed to partial size 20mm by shearing double-shaft crusher, and magnetic separator is selected metallics and recycled
It utilizes, rubbish is sent into garbage feeding pond after being crushed；House refuse is through biological heat Air Coupling desiccation, biological dewatered time after broken
5 days, biological dewatered temperature was 75 DEG C, and hot-air drying time 0.5 day, desiccation temperature was 110 DEG C, coupled house refuse after desiccation
Moisture content is less than 20%；It is 21% into coupling desiccation air oxygen content, wherein 3% oxygen is consumed through overcoupling desiccation, for giving birth to
Object desiccation reaction, coupling drying tail gas oxygen content 18% are used as domestic garbage pyrolysis primary air；Rubbish is uniformly sent into after desiccation
Domestic garbage pyrolysis gasification oven carries out pyrolytic gasification, and 600 DEG C of gasification temperature, pyrolysis generates fuel gas and lime-ash；Pyrolysis generates
Fuel gas by gas operated device enter dual firing chamber carry out second-time burning, dual firing chamber's temperature be 850 DEG C, dual firing chamber generate high temperature
Smoke backflow provides partial heat to pyrolysis gasification furnace for domestic garbage pyrolysis；Second-time burning generates high-temperature flue gas and changes through chilling
Hot device, flue-gas temperature are reduced to 200 DEG C in 2s, and it is available that heat exchange generates thermal energy；Flue gas is through air preheater and sky after heat exchange
Gas carries out heat exchange, and flue-gas temperature is reduced to 160 DEG C；Then flue gas is handled through exhaust treatment system, and flue gas reaches " house refuse
Burn contamination control standard " (GB18485-2014) emission limit requirement, through smoke stack emission；Air is through air preheater and cigarette
Gas carries out heat exchange, and air themperature is heated to 90 DEG C, and hot-air is as coupling desiccation heat source；Coupling drying tail gas is made after demisting
For domestic garbage pyrolysis gasification primary air.
Example 2
House refuse is crushed to partial size 35mm by shearing double-shaft crusher, and magnetic separator is selected metallics and recycled
It utilizes, rubbish is sent into garbage feeding pond after being crushed；House refuse is through biological heat Air Coupling desiccation, biological dewatered time after broken
6 days, biological dewatered temperature was 68 DEG C, and hot-air drying time 0.75 day, desiccation temperature was 100 DEG C, coupled life rubbish after desiccation
Rubbish moisture content is less than 20%；It is 21% into coupling desiccation air oxygen content, consumes wherein 4.5% oxygen through overcoupling desiccation, use
In biological dewatered reaction, couples drying tail gas oxygen content 16.5% and be used as domestic garbage pyrolysis primary air；Rubbish is equal after desiccation
Even feeding domestic garbage pyrolysis gasification oven carries out pyrolytic gasification, and 700 DEG C of gasification temperature, pyrolysis generates fuel gas and lime-ash；Heat
It solves the fuel gas generated and dual firing chamber's progress second-time burning is entered by gas operated device, dual firing chamber's temperature is 950 DEG C, and dual firing chamber produces
Raw high temperature gases recirculating provides partial heat to pyrolysis gasification furnace for domestic garbage pyrolysis；Second-time burning generates high-temperature flue gas warp
Rapid-cooling heat exchanger, flue-gas temperature are reduced to 215 DEG C in 2s, and it is available that heat exchange generates thermal energy；Flue gas is through air preheat after heat exchange
Device and air carry out heat exchange, and flue-gas temperature is reduced to 160 DEG C；Then flue gas is handled through exhaust treatment system, and flue gas reaches " raw
Pollution in Municipal Solid Waste Incineration living controls standard " the emission limit requirement of (GB18485-2014), through smoke stack emission；Air is through air preheat
Device and flue gas carry out heat exchange, and air themperature is heated to 100 DEG C, and hot-air is as coupling desiccation heat source；Couple drying tail gas warp
As domestic garbage pyrolysis gasification primary air after demisting.
Example 3
House refuse is crushed to partial size 50mm by shearing double-shaft crusher, and magnetic separator is selected metallics and recycled
It utilizes, rubbish is sent into garbage feeding pond after being crushed；House refuse is through biological heat Air Coupling desiccation, biological dewatered time after broken
7 days, desiccation temperature was 61 DEG C, and hot-air drying time 1 day, desiccation temperature was 90 DEG C, coupled house refuse moisture content after desiccation
Less than 20%；It is 21% into coupling desiccation air oxygen content, wherein 6% oxygen is consumed through overcoupling desiccation, for biological dewatered
Reaction, coupling drying tail gas oxygen content 15% are used as domestic garbage pyrolysis primary air；Rubbish is uniformly sent into life rubbish after desiccation
Rubbish pyrolysis gasification furnace carries out pyrolytic gasification, and 800 DEG C of gasification temperature, pyrolysis generates fuel gas and lime-ash；Pyrolysis generates flammable
Gas enters dual firing chamber by gas operated device and carries out second-time burning, and dual firing chamber's temperature is 1100 DEG C, and dual firing chamber generates high-temperature flue gas
It is back to pyrolysis gasification furnace, provides partial heat for domestic garbage pyrolysis；Second-time burning generates high-temperature flue gas through rapid-cooling heat exchanger,
Flue-gas temperature is reduced to 225 DEG C in 2s, and it is available that heat exchange generates thermal energy；Flue gas is carried out through air preheater and air after heat exchange
Heat exchange, flue-gas temperature are reduced to 160 DEG C；Then flue gas is handled through exhaust treatment system, and flue gas reaches " consumer waste incineration dirt
Contaminate control standard " (GB18485-2014) emission limit requirement, through smoke stack emission；Air is carried out through air preheater and flue gas
Heat exchange, air themperature are heated to 110 DEG C, and hot-air is as coupling desiccation heat source；Drying tail gas is coupled after demisting as life
Refuse pyrolysis gasification primary air living.
The example of the above is only better embodiment of the invention, the implementation model being not intended to limit the invention
It encloses.It should be pointed out that due to the finiteness of literal expression, and objectively there is unlimited specific structure, for skill belonging to the present invention
For the those of ordinary skill in art field, under the premise of not departing from central scope of the present invention, it can also make and several simply push away
It drills or replaces, be regarded as belonging to the scope of protection of the present invention.
Claims (10)
1. a kind of house refuse couples desiccation pyrolysis processing technique, which is characterized in that it includes following operating procedure:
(1) house refuse that moisture content is 45%~60% is pre-processed through broken, magnetic separation, makes broken rubbish partial size 20
~50mm, the metallics that magnetic separation is isolated are recycled；
(2) broken house refuse is subjected to biological heat Air Coupling drying and other treatment, the house refuse after coupling desiccation is aqueous
Rate is less than 20%；
(3) house refuse after desiccation is uniformly sent into pyrolysis gasification furnace and carries out pyrolytic gasification, the pyrolysis temperature 600 of use~
800 DEG C, pyrolysis generates fuel gas and lime-ash, by lime-ash outlet；
(4) fuel gas for generating pyrolysis is sent into dual firing chamber and carries out second-time burning, and dual firing chamber's temperature is 850~1100 DEG C；
(5) part high-temperature flue gas is sent into chilling heat exchange to pyrolysis gasification furnace by the high temperature gases recirculating for generating part dual firing chamber
Device carries out heat exchange processing, and flue-gas temperature is made to be reduced to 200~225 DEG C in 2s, and will change thermogenetic thermal energy outlet and utilize；
(6) flue gas after heat exchange is subjected to heat exchange through air preheater and air, flue-gas temperature is reduced to 160 DEG C；
(7) finally flue gas is handled through exhaust treatment system, to reach " consumer waste incineration contamination control standard " (GB18485-
2014) emission limit requirement, through smoke stack emission.
2. house refuse couples desiccation pyrolysis processing technique according to claim 1, which is characterized in that described in step (2)
In biological heat Air Coupling drying and other treatment, biological dewatered treatment temperature is 61~75 DEG C, 5~7 days biological dewatered time；It uses
Hot-air desiccation temperature is 90~110 DEG C, hot-air drying time 0.5~1 day.
3. house refuse according to claim 1 or claim 2 couples desiccation pyrolysis processing technique, which is characterized in that in step (2),
The tail gas that coupling drying and other treatment is generated is after demisting as the primary air of pyrolysis gasification furnace.
4. house refuse according to claim 1 or claim 2 couples desiccation pyrolysis processing technique, which is characterized in that in step (4),
The fuel gas is 2~3s in the residence time of dual firing chamber.
5. house refuse according to claim 1 or claim 2 couples desiccation pyrolysis processing technique, which is characterized in that in step (6),
Temperature is heated to 90~110 DEG C after air preheater and flue gas carry out heat exchange by air, and as biological heat Air Coupling
The heat source of drying and other treatment.
6. the processing system that house refuse coupling desiccation pyrolysis processing technique uses according to claim 1, which is characterized in that
It include be sequentially connected from front to back the crushing-magnetic selection equipment connect, biological heat Air Coupling drying and other treatment equipment, pyrolysis gasification furnace,
Dual firing chamber, rapid-cooling heat exchanger, air preheater, exhaust treatment system and chimney；Crushing-magnetic selection equipment and biological heat Air Coupling
Pass through spiral transferring respectively between drying and other treatment equipment and between biological heat Air Coupling drying and other treatment equipment and pyrolysis gasification furnace
Machine is sent to connect, dual firing chamber is set to the outside of pyrolysis gasification furnace and one is made, by leading between pyrolysis gasification furnace and dual firing chamber
Stomata is connected, between dual firing chamber and rapid-cooling heat exchanger, between rapid-cooling heat exchanger and air preheater, air preheater and tail gas
It is connected by offgas duct between processing system and between exhaust treatment system and chimney, connects exhaust treatment system and cigarette
The offgas duct of chimney is equipped with air-introduced machine.
7. house refuse couples desiccation pyrolysis treatment systems according to claim 6, it is characterised in that: the crushing-magnetic selection is set
Standby to be made of crusher and magnetic separator, the crusher uses shearing double-shaft crusher.
8. house refuse couples desiccation pyrolysis treatment systems according to claim 6, it is characterised in that: the biology hot-air
Coupling drying and other treatment equipment includes shell, sets gradually cloth gas-bearing formation, supporting layer, desiccation layer, the gas distribution in shell from the bottom to top
Layer includes air gas distribution pipe and hot wind gas distribution pipe, and the supporting layer is made of supporting plate, and air distribution outlet is evenly equipped on supporting plate, described
Desiccation layer is located at the top of supporting layer, for placing through crushing-magnetic selection treated house refuse, and temperature is equipped in desiccation layer
Detection device and oxygen content detector.
9. house refuse couples desiccation pyrolysis treatment systems according to claim 6, it is characterised in that: the biology hot-air
The headspace for coupling drying and other treatment equipment is sent through air duct to pyrolysis gasification furnace, is equipped with air blower in air duct；The heat
Wind gas distribution pipe connects hot air pipe, and hot air pipe is from the Base top contact of air preheater, the bottom of air preheater and air gas distribution
Pipe connects air blower by the road respectively.
10. house refuse couples desiccation pyrolysis treatment systems according to claim 6, it is characterised in that: the dual firing chamber
Part hot gas leads back pyrolysis gasification furnace as domestic garbage pyrolysis primary air through return pipe, and part hot gas is delivered to through offgas duct
Rapid-cooling heat exchanger.
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| CN114308978A (en) * | 2021-11-23 | 2022-04-12 | 中国恩菲工程技术有限公司 | Garbage treatment system and method |
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