CN110440262A - A kind of refuse pyrolysis and burning harmlessness disposing system and method based on pulverized-coal fired boiler - Google Patents
A kind of refuse pyrolysis and burning harmlessness disposing system and method based on pulverized-coal fired boiler Download PDFInfo
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- CN110440262A CN110440262A CN201910817610.3A CN201910817610A CN110440262A CN 110440262 A CN110440262 A CN 110440262A CN 201910817610 A CN201910817610 A CN 201910817610A CN 110440262 A CN110440262 A CN 110440262A
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 58
- 239000003245 coal Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 52
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 45
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000003546 flue gas Substances 0.000 claims abstract description 36
- 238000009434 installation Methods 0.000 claims abstract description 30
- 238000010304 firing Methods 0.000 claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 11
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 claims description 18
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 239000002243 precursor Substances 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 238000004227 thermal cracking Methods 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 239000002910 solid waste Substances 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 239000010791 domestic waste Substances 0.000 description 12
- 238000004056 waste incineration Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- 239000002817 coal dust Substances 0.000 description 3
- 230000000185 dioxinlike effect Effects 0.000 description 3
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 208000020442 loss of weight Diseases 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010013082 Discomfort Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 239000000284 extract Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 208000018875 hypoxemia Diseases 0.000 description 1
- 230000007954 hypoxia Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
-
- 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
-
- 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
- F23G5/442—Waste feed arrangements
- F23G5/444—Waste feed arrangements for solid waste
Abstract
The present invention provides a kind of refuse pyrolysis based on pulverized-coal fired boiler and burns harmlessness disposing system and method, and structure is simple, and design is rationally, easy to use, and environmental-friendly, safety coefficient is high.The system comprises sequentially connected boiler furnace, flue and furnace cigarette system and sequentially connected drying and pyrolysis installation, crush conveying device and incineration firing device；The input terminal of the drying and pyrolysis installation sets gradually rubbish crushing and sorting unit and batcher, the input terminal of furnace cigarette system access to batcher；The furnace cigarette system includes high-temperature flue gas pipeline and medium temperature stove pipe road, and high-temperature flue gas pipeline is connected to Pulverized Coal fired Boiler Furnace bottom extracting high-temperature furnace cigarette, and medium temperature stove pipe road is connected to extraction moderate oven cigarette in pulverized-coal fired boiler reversal chamber to economizer exit flue；The incineration firing device is set to the main burner lowest level coal burner of boiler furnace between after-flame wind combustor.
Description
Technical field
The invention belongs to domestic waste environmental protection to utilize field, be related to a kind of Disposal of City Domestic Garbage and utilize skill
Art, specially a kind of refuse pyrolysis and burning harmlessness disposing system and method based on pulverized-coal fired boiler.
Background technique
Traditional waste incineration carries out on grate furnace or circulating fluidized bed boiler, but grate furnace and circulating fluid bed boiler
Bore temperature is lower, can not thoroughly remove the dioxin and its precursor generated in Refuse Incineration Process.Although pulverized-coal fired boiler burner hearth
Temperature is higher, but since pulverized-coal fired boiler can not direct burning disposal rubbish using coal dust suspension combustion mode.Rubbish material is dry
Wet complex shape cannot directly be milled into powder with existing equipment and be sent into furnace chamber inner combustion, and due to ten partial volume of the stink of rubbish
Easily diffusion, so pulverized-coal fired boiler carries out mixing burning rubbish without hair.
Domestic waste refers to the solid waste generated in the daily life of city and law, administrative regulation regulation view
For the solid waste of domestic waste, have the characteristics that complicated component, moisture content are high, inorganic substances content is high.With China
The continuous improvement of the quickening of urbanization process, urban development and living standards of the people, China's Municipal Domestic Garbage Output is year by year
Increase, caused problem of environmental pollution is increasingly severe, has become a question of common concern in world wide, is
One very arduous comprehensive, systemic engineering.
Currently, the main processing method of domestic waste is landfill method, composting method and incineration method, each urban life
Waste treatment and disposal level and mode have larger difference, and house refuse standardization processing disposition in most cities is at the early-stage, defend
Raw landfill is the main processing method of disposal of most domestic wastes, and there are also easy refuse landfills to transport for urban
Row.
Waste incineration is one of main method for the treatment of of urban garbage, after rubbish is handled with incineration method, garbage energy decrement
Change, saves land used, can also eliminate various pathogen.Modern waste incineration is to reach volume reduction, loss of weight after full combustion at high temperature
And the purpose of recycling, main includes dry, burning and after-flame three phases.Pass through computer automatic control system and automatic combustion
The combustion conditions that control system is capable of immediately monitoring and rubbish in adjustment furnace are burnt, adjust the fire grate speed of service and combustion air in time
Amount, to guarantee garbage disposal always in controllable state.Volume reduction rate after waste incineration is very high, garbage bulk can be made to reduce
80%~90%, it realizes volume reduction, the loss of weight of garbage disposal, reduces rubbish land occupation stock number to the maximum extent, can also have
The thermal energy that effect is generated using waste incineration.
Currently, decomposing about dioxin, universal view is 850 DEG C or so, the residence time reaches 2 seconds in burner hearth, or
1000 DEG C, left and right stops 1 second or 1200 DEG C or so several microseconds of stop in burner hearth and is considered dioxin and can decompose completely.
If temperature is controlled at 1200 DEG C or more, it will include hardly dioxin precursor in product, and substantially reduce the later period again
Synthesize probability.Existing waste incineration method fails to be received by general public always, and disadvantage outstanding behaviours is by ignition temperature
Limitation；Existing domestic waste incineration maximum temperature cannot make dioxin-like chemical high temperature at 800~1000 DEG C or so completely
It decomposes, the dioxin of latency and heavy metal pollution are heavier, cost is expensive, complicated for operation and waste of resource etc..Although
Its pollution prevention technique is increasingly modified, but still immature so far, can not large-scale promotion and application.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of refuse pyrolysis based on pulverized-coal fired boiler and burns nothing
Evilization disposal system and method, structure is simple, and design is rationally, easy to use, environmental-friendly, and safety coefficient is high.
The present invention is to be achieved through the following technical solutions:
A kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler, including sequentially connected Boiler Furnace
Thorax, flue and furnace cigarette system and sequentially connected drying and pyrolysis installation crush conveying device and incineration firing device；
The input terminal of the drying and pyrolysis installation sets gradually rubbish crushing and sorting unit and batcher, furnace cigarette system
System is linked into the input terminal of batcher；
The furnace cigarette system includes high-temperature flue gas pipeline and medium temperature stove pipe road, and high-temperature flue gas pipeline is connected to coal dust pot
Furnace burner hearth bottom extracting high-temperature furnace cigarette, medium temperature stove pipe road, which is connected in pulverized-coal fired boiler reversal chamber to economizer exit flue, to be extracted
Moderate oven cigarette；
Main burner lowest level coal burner to the burnout degree that the incineration firing device is set to boiler furnace burns
Between device.
Preferably, rubbish crushes and sorting unit is for being crushed and being sorted, and sieves metal and stone, remaining life rubbish
Rubbish outlet connection batcher input terminal.
Preferably, dry and pyrolysis installation includes the rotary drive motor for rotating shell and rotation hull outside being arranged in；
The rotation shell is in hollow cylindrical shape, and input terminal rotary seal connects batcher, and output end rotary seal connection crushes
Conveying device entrance.
Further, it is provided with several steel balls in shell of revolution body, and hollow cylinder is divided into the flase floor of multiple chambers,
Steel ball is split in multiple chambers, and steel ball is rotated together with flase floor and rotation shell.
Preferably, the batcher uses screw input feeder.
Preferably, the crushing conveying device uses mill exhauster.
Preferably, the input terminal on medium temperature stove pipe road is disposed with along reversal chamber to economizer exit flue and multiple takes cigarette
Mouthful, output end and high-temperature flue gas pipeline converge simultaneously road.
A kind of refuse pyrolysis and burning harmless disposal method based on pulverized-coal fired boiler, using described in above-mentioned any one
System includes the following steps,
A. house refuse is first fed into rubbish crushing and sorting unit is crushed and is sorted, and wherein metal and stone are sieved
Point, remaining house refuse is sent into dry thermal cracking in dry and pyrolysis installation by batcher；
B. mixed high-temperature flue gas and moderate oven cigarette in furnace cigarette system are sent into dry and pyrolysis installation through batcher and are entered
Mouthful, high-temperature low-oxygen environment is formed in dry and pyrolysis installation, rubbish is heated by furnace cigarette under high-temperature low-oxygen environment and is pyrolyzed, and removes water
Point, gaseous material is precipitated；Gaseous material enters burner hearth with flue gas, further participates in coal-fired boiler combustion；
C. remaining solid waste residue revolves in drying and pyrolysis installation with steel ball and flase floor after refuse pyrolysis
Turn, particle is broken under steel ball squeezing action by furnace cigarette and is carried along into crushing conveying device, is further milled into for boiler
The fine powder of burning, while crushing conveying device makes its upstream equipment and pipeline be in negative pressure state；
D. the gaseous material and the broken fine powder ground that rubbish is precipitated in drying and pyrolysis installation are sent with furnace cigarette
Enter and burns in the main burner lowest level coal burner to the incineration firing device between after-flame wind combustor of boiler furnace
Disposition, this region fire box temperature is at 1300 DEG C or more, so that having generated dioxin and its precursor decomposes completely.
Preferably, the moderate oven smoke temperature degree taken in the step b is 300~700 DEG C, and the high-temperature flue gas temperature taken is
750 DEG C or more.
Preferably, furnace cigarette system output furnace smoke temperature degree by high-temperature flue gas pipeline high-temperature flue gas temperature and medium temperature stove pipe
Road takes cigarette temperature mixing to determine.
Compared with prior art, the invention has the following beneficial technical effects:
System composition according to the present invention is simple, and initial cost and operation and maintenance cost substantially reduce；Pass through existing combustion
Coal burning boiler provides high-temperature flue gas, not only enables rubbish adequately dry and is pyrolyzed, but also makes dry and pyrolysis installation one
Aspect is in negative pressure, and dioxin on the other hand can be effectively suppressed to form the refuse pyrolysis environment of high-temperature low-oxygen negative pressure in hypoxemia
And its precursor generates, safe and efficient, environmental protection is reliable；Simultaneously, flue gas can carry fuel gas covering into burner hearth, no
Only exhaust gas volumn will not be reduced, and increase heat supply, make full use of the high temperature in coal-burning boiler and subsequent heat recovery
And filtration system, so that domestic waste obtains harmless treatment.
Method of the present invention, compared to traditional domestic waste incineration maximum temperature at 800~1000 DEG C or so, no
It can make dioxin-like chemical pyrolytic completely.Pulverized-coal fired boiler can be organized to burn well, and furnace combustion temperature is all at 1300 DEG C
More than, flue gas all decomposes in 2~3s of residing time in furnace, dioxin-like chemical, and adequately heat transfer and mass transfer make two evils
English organic precursor object carries out sufficient oxidizing fire in this region, does not include dioxin precursor in product, thus to the greatest extent
Possibly eliminate the possibility that dioxin synthesizes again in 300~500 DEG C of smoke temperature sections.Therefore at house refuse of the present invention
Reason technology can preferably control the discharge of dioxin.It is directly entered hearth combustion after the pretreatment of house refuse material, there is no can
The security risk for firing gas burst, leakage, rubbish material is in negative pressure system before furnace cigarette blower, and no intermediate product is to leaking
Dew, will not impact surrounding enviroment；Wherein domestic waste dries flue gas of the heat from coal-burning boiler of needs,
It does not need to expend other non-renewable energy or itself house refuse energy, efficiency of energy utilization is high.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of system described in present example.
In figure: 1 is boiler furnace, and 2 be boiler flue, and 3 be furnace cigarette system, and 4 be dry and pyrolysis installation, and 401 be rotation
Shell, 402 be rotary drive motor, and 5 is crush conveying device, and 6 be incineration firing device, and 7 be high temperature flue gas pipeline, and 8 be medium temperature
Flue gas pipeline, 9 be rubbish crushing and sorting unit, and 10 be batcher, and 11 be SOFA burner, and 12 be OFA burner, based on 13
Burner.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
A kind of refuse pyrolysis based on pulverized-coal fired boiler of the present invention and burn harmlessness disposing system, as shown in Figure 1, include according to
Boiler furnace 1, flue 2 and the furnace cigarette system 3 of secondary connection and sequentially connected drying and pyrolysis installation 4 crush conveying device
5 and incineration firing device 6, dry and pyrolysis installation 4 input terminal sets gradually rubbish and crushes and sorting unit 9 and batcher 10,
Furnace cigarette system 3 is linked into the input terminal of batcher 10；Furnace cigarette system 3 includes high-temperature flue gas pipeline 7 and medium temperature stove pipe road 8.
House refuse is first fed into rubbish crushing and sorting unit 9 is crushed and is sorted, wherein the discomforts such as metal, stone
The rubbish of suitable dry thermal cracking is sized, and is suitable for the rubbish of dry thermal cracking by the drying of the feeding of batcher 10 and pyrolysis installation 4.
By the high-temperature flue gas pipeline 7 in furnace cigarette system 3 from Pulverized Coal fired Boiler Furnace bottom extracting high-temperature furnace cigarette, high-temperature flue gas
Temperature is 750 DEG C or more, takes moderate oven in from pulverized-coal fired boiler reversal chamber to economizer exit flue by medium temperature stove pipe road 8
Cigarette, moderate oven smoke temperature degree are 300~700 DEG C, and specific furnace cigarette is taken position and determined by required furnace smoke temperature degree, and furnace smoke temperature degree is by needing
The rubbish property to be disposed determines, controls required flue-gas temperature, the input on medium temperature stove pipe road 8 using multiple spot flue gas hybrid mode
End is disposed with multiple smoke taking mouths along reversal chamber to economizer exit flue, adapts to different types of refuse pyrolysis temperature and wants
It asks.
Mixed furnace cigarette is sent into dry and 4 entrance of pyrolysis installation via batcher 10, is formed in dry and pyrolysis installation 4
High-temperature low-oxygen environment, rubbish are heated by furnace cigarette under high-temperature low-oxygen environment and are pyrolyzed, and remove moisture, and gaseous material is precipitated.Wherein gas
State substance enters burner hearth with flue gas, further participates in coal-fired boiler combustion.
Dry and pyrolysis installation 4 is rotary type, is disposed with steel ball and flase floor in dry and pyrolysis installation 4, is running
When rotate jointly, remaining solid waste residue is in dry and pyrolysis installation 4 with steel ball and flase floor after refuse pyrolysis
Rotation is broken into fine particle by furnace cigarette under steel ball squeezing action and is carried along into crushing conveying device 5, can further be milled into
It is suitable for the fine powder of boiler combustion, while steel ball can exchange heat in intensifying device.Dry and pyrolysis installation 4 outlet is disposed with powder
The solid residue of upstream can further be crushed and be conveyed by furnace cigarette system 3 to burner hearth by broken conveying device 5.Crush conveying
Device 5 can make its upstream equipment and pipeline be in negative pressure state simultaneously, on the one hand provide power to extract furnace cigarette and material conveying,
On the other hand material and exhaust gas is avoided to leak.
Specifically, dry and pyrolysis installation 4 includes that rotation shell 401 and the rotation being arranged in outside rotation shell 401 are driven
Dynamic motor 402；The rotation shell 401 is in hollow cylindrical shape, and input terminal rotary seal connection is using screw input feeder
Batcher 10, output end rotary seal connection use 5 entrance of crushing conveying device of mill exhauster；It is provided in rotation shell 401
Several steel balls, and hollow cylinder is divided into the flase floor of multiple chambers, steel ball is split in multiple chambers, by steel ball with
To the common squeezing action of garbage drying when flase floor rotates, so that the Domestic garbage crushing after dry is at fine particle.
The gaseous material and solid residue that rubbish is precipitated in dry and pyrolysis installation 4 are sent into flue gas is located at pot
In the main burner 13 lowest level coal burner to the incineration firing device 6 between after-flame wind combustor 12 of furnace burner hearth 1 at burning
Set, this region be coal dust firing most active regions, due to a large amount of coal dusts participate in burn, fire box temperature at 1300 DEG C or more, and
Garbage decomposition object is more than 2 seconds in Pulverized Coal fired Boiler Furnace burning time, can guarantee that generated dioxin and its precursor decomposes completely,
Dioxin combustion residue is avoided, and the polymerization of dioxin precursor generates dioxin again in the low temperature flue of tail portion, realizes harmless
Change disposition.
A kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler of the present invention, is suitable for being located at city week
While there is the coal-burning power plant of domestic waste traffic condition to carry out domestic waste coupling coal fired power generation production.Open one kind
New Disposal of City Domestic Garbage and utilization technology eliminates the dioxin generated in Refuse Incineration Process, reduces urban life rubbish
Rubbish cost of disposal improves the utilization rate of domestic waste, enhances the market competitiveness and corporate image of fossil power plant.It keeps away
Exempt from traditional garbage incineration method to pollute caused by ambient atmosphere and water environment, while by the electricity, vapour, heat etc. of coal-burning power plant
The utilization of resources sufficiently reduces the cost and social influence of urban garbage disposal in garbage disposal industry.
A kind of refuse pyrolysis and burning harmless disposal method based on pulverized-coal fired boiler of the present invention, passes through and extracts pulverized-coal fired boiler
Hot fume is dried and is pyrolyzed to rubbish, the gas and solid matter after pyrolysis be broken after be sent into Pulverized Coal fired Boiler Furnace in
A large amount of coal dusts, combustion air mixed burning avoid generating dioxin and its precursor, garbage harmless disposition are realized, due to taking out
It takes the oxygen concentration of flue gas lower, prevents the explosion that may occur in garbage decomposition and conveying.
Rubbish, which is dried, in flue gas evaporates moisture, and organic matter is further pyrolyzed as CO, H in rubbish2、CH4Equal gases object
Matter, there is no combustion reactions under flue gas hypoxia condition, reduce the generation of dioxin.
Furnace cigarette system 3 is used for defeated after extracting high-temperature flue gas in the burner hearth 1 or flue 2 of pulverized-coal fired boiler and the mixing of medium temperature flue gas
Material after dry thermal cracking is sent, what dry thermal cracking device 4 and crushing material conveying device 5 were used to that rubbish to be dried and be pyrolyzed,
Then waste incineration is carried out by Pulverized Coal fired Boiler Furnace 1 and incineration firing device 6.
Claims (10)
1. a kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler, which is characterized in that including being sequentially connected
Boiler furnace (1), flue (2) and furnace cigarette system (3) and sequentially connected drying and pyrolysis installation (4), crush conveying dress
Set (5) and incineration firing device (6)；
The input terminal of the drying and pyrolysis installation (4) sets gradually rubbish crushing and sorting unit (9) and batcher (10),
Furnace cigarette system (3) is linked into the input terminal of batcher (10)；
The furnace cigarette system (3) includes high-temperature flue gas pipeline (7) and medium temperature stove pipe road (8), high-temperature flue gas pipeline (7) connection
To Pulverized Coal fired Boiler Furnace bottom extracting high-temperature furnace cigarette, medium temperature stove pipe road (8) is connected to pulverized-coal fired boiler reversal chamber to economizer and goes out
Moderate oven cigarette is extracted in mouth flue；
The incineration firing device (6) is set to main burner (13) the lowest level coal burner of boiler furnace (1) to after-flame
Between wind combustor (12).
2. a kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler according to claim 1, special
Sign is that rubbish crushes and sorting unit (9) is for being crushed and being sorted, and sieves metal and stone, remaining house refuse go out
Mouth connection batcher (10) input terminal.
3. a kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler according to claim 1, special
Sign is that dry and pyrolysis installation (4) includes rotation shell (401) and setting the rotation driving external in rotation shell (401)
Motor (402)；The rotation shell (401) is in hollow cylindrical shape, and input terminal rotary seal connects batcher (10), output
Rotary seal connection is held to crush conveying device (5) entrance.
4. a kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler according to claim 3, special
Sign is, is provided with several steel balls in rotation shell (401), and hollow cylinder is divided into the flase floor of multiple chambers, steel
Ball is split in multiple chambers, and steel ball is rotated together with flase floor and rotation shell (401).
5. a kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler according to claim 1, special
Sign is that the batcher (10) uses screw input feeder.
6. a kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler according to claim 1, special
Sign is that the crushing conveying device (5) uses mill exhauster.
7. a kind of refuse pyrolysis and burning harmlessness disposing system based on pulverized-coal fired boiler according to claim 1, special
Sign is that the input terminal on medium temperature stove pipe road (8) is disposed with multiple smoke taking mouths along reversal chamber to economizer exit flue, defeated
Outlet and high-temperature flue gas pipeline (7) converge and road.
8. a kind of refuse pyrolysis and burning harmless disposal method based on pulverized-coal fired boiler, which is characterized in that use claim
System described in 1-7 any one, includes the following steps,
A. house refuse is first fed into rubbish crushing and sorting unit (9) is crushed and is sorted, and wherein metal and stone are sieved
Point, remaining house refuse is sent into dry and pyrolysis installation (4) interior dry thermal cracking by batcher (10)；
B. mixed high-temperature flue gas and moderate oven cigarette in furnace cigarette system (3) are sent into dry and pyrolysis through batcher (10) and are filled
(4) entrance is set, forms high-temperature low-oxygen environment in dry and pyrolysis installation (4), rubbish is heated under high-temperature low-oxygen environment by furnace cigarette
Pyrolysis removes moisture, and gaseous material is precipitated；Gaseous material enters burner hearth with flue gas, further participates in coal-fired boiler combustion；
C. remaining solid waste residue revolves in dry and pyrolysis installation (4) with steel ball and flase floor after refuse pyrolysis
Turn, particle is broken under steel ball squeezing action by furnace cigarette and is carried along into crushing conveying device (5), is further milled into for pot
The fine powder of furnace burning, while crushing conveying device (5) makes its upstream equipment and pipeline be in negative pressure state；
D. the gaseous material and the broken fine powder ground that rubbish is precipitated in dry and pyrolysis installation (4) are sent into furnace cigarette
Main burner (13) lowest level coal burner positioned at boiler furnace (1) is to the incineration firing between after-flame wind combustor (12)
Burning disposition in device (6), this region fire box temperature is at 1300 DEG C or more, so that having generated dioxin and its precursor divides completely
Solution.
9. a kind of refuse pyrolysis and burning harmless disposal method based on pulverized-coal fired boiler according to claim 8, special
Sign is that the moderate oven smoke temperature degree taken in the step b is 300~700 DEG C, and the high-temperature flue gas temperature taken is 750 DEG C or more.
10. a kind of refuse pyrolysis and burning harmless disposal method based on pulverized-coal fired boiler according to claim 8, special
Sign is, high-temperature flue gas temperature and medium temperature stove pipe road of the furnace smoke temperature degree of furnace cigarette system (3) output by high-temperature flue gas pipeline (7)
(8) take cigarette temperature mixing determine.
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| CN112393227A (en) * | 2020-11-24 | 2021-02-23 | 广州中电荔新热电有限公司 | Solid waste treatment device and treatment method |
| CN113883524A (en) * | 2021-10-18 | 2022-01-04 | 西安西热锅炉环保工程有限公司 | Heavy metal-containing multi-source waste disposal system and method based on pulverized coal fired boiler |
| CN113883528A (en) * | 2021-10-18 | 2022-01-04 | 西安西热锅炉环保工程有限公司 | Multi-source waste disposal system and method based on pulverized coal fired boiler |
| CN114076316A (en) * | 2020-08-13 | 2022-02-22 | 国家能源投资集团有限责任公司 | Method for treating municipal refuse in cooperation with coal-fired power plant |
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