CN107990322A - A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series - Google Patents
A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series Download PDFInfo
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- CN107990322A CN107990322A CN201711453414.XA CN201711453414A CN107990322A CN 107990322 A CN107990322 A CN 107990322A CN 201711453414 A CN201711453414 A CN 201711453414A CN 107990322 A CN107990322 A CN 107990322A
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- membrane type
- separator
- cyclone separator
- burner hearth
- cfb boiler
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- 239000012528 membrane Substances 0.000 title claims abstract description 67
- 238000004056 waste incineration Methods 0.000 title claims abstract description 20
- 238000000926 separation method Methods 0.000 title claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 9
- 239000007787 solid Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 32
- 239000003546 flue gas Substances 0.000 claims description 31
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 14
- 239000011295 pitch Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 12
- 239000000428 dust Substances 0.000 description 34
- 239000010813 municipal solid waste Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000002956 ash Substances 0.000 description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000460 chlorine Substances 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 239000002803 fossil fuel Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 231100000167 toxic agent Toxicity 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 208000025599 Heat Stress disease Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005842 biochemical reaction Methods 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/16—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces arranged on non-filtering conveyors or supports
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—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
-
- 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
- F23J15/006—Layout of treatment plant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
- B01D2258/0291—Flue gases from waste incineration plants
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a kind of cyclone separator and the waste incineration CFB boiler of membrane type separation apparatuses in series, including the CFB boiler burner hearth burnt away the refuse and back-end ductwork, further include the cyclone separator and membrane type separator being sequentially connected in series between burner hearth exhanst gas outlet and back-end ductwork, burner hearth and membrane type separator bottom are respectively provided with ash-removing mouth, the smoke inlet of cyclone separator is connected with burner hearth exhanst gas outlet, its underpart material outlet is connected by feeding back device with burner hearth, the exhanst gas outlet of membrane type separator is connected with back-end ductwork, the exhanst gas outlet of cyclone separator is connected with the smoke inlet of membrane type separator, and membrane type separator compares the gas-solid disngaging efficiency higher of cyclone separator.The present invention be it is a kind of there is Di bioxin, low dirt to discharge, Low investment, low operating cost significant advantage waste incineration CFB boiler.
Description
Technical field
The present invention is suitable for the waste incineration CFB boiler using domestic waste as fuel.
Background technology
In recent years, with increasing of the country to pollutant control working dynamics, Domestic refuse incinerator afterbody flying dust quilt
It is included in danger wastes register.
Domestic refuse incinerator has two kinds of forms of CFB and fire grate, for the thorough degree of Disposal of Domestic, CFB pots
Stove has the incomparable advantage of furnace grate.But substantial amounts of flying dust can be formed with CFB boiler domestic garbage burning so that
Chlorine element in flue gas forms this extremely toxic substance of bioxin in 200 DEG C~450 DEG C temperature sections of boiler tail, they are present in winged
It is the behavior that national standard is strictly forbidden if being allowed to the health that discharge will damage people in ash；And containing big in flying dust
Heavy metal substance is measured, they are in an unsure state, and are easily discharged from flying dust.In order to dispose these flying dusts, rubbish
Power plant has to spend substantial amounts of operating cost that they are carried out harmless treatment, to reach the emission request of country's permission, heap
It is put into landfill yard.
And when disposing house refuse with fire grate burning boiler, although many aspects are good far away from CFB boiler disposal effect,
It is due to that the flying dust amount that its burning produces is few, the operating cost of power plant's disposal flying dust is low, so economy of power plant is good, house refuse
Power plant abandons CFB furnace type and uses fire grate type of furnace burning domestic garbage one after another.
The content of the invention
It is an object of the invention to：It is proposed it is a kind of there is Di bioxin, low dirt to discharge, Low investment, low operating cost it is aobvious
The waste incineration CFB boiler of work advantage.
The purpose of the present invention is realized by following technical proposals：
The waste incineration CFB boiler of a kind of cyclone separator and membrane type separation apparatuses in series, including the CFB pots burnt away the refuse
Stove burner hearth and back-end ductwork, further include the cyclone separator and membrane type being sequentially connected in series between burner hearth exhanst gas outlet and back-end ductwork
Separator, burner hearth and membrane type separator bottom are respectively provided with ash-removing mouth, and smoke inlet and the burner hearth flue gas of cyclone separator go out
Mouth connection, its underpart material outlet are connected by feeding back device with burner hearth, the exhanst gas outlet and back-end ductwork of membrane type separator
It is connected, the exhanst gas outlet of cyclone separator is connected with the smoke inlet of membrane type separator, and membrane type separator compares whirlwind
The gas-solid disngaging efficiency higher of separator.
In this patent, substantial amounts of chlorine element is contained in house refuse, at the same time containing a certain amount of each heavy metal species, with routine
Fossil fuel is entirely different, and house refuse in combustion, can generate colourless, tasteless, transparent solid --- extremely toxic substance
Bioxin, while substantial amounts of heavy metal can be adhered in flying dust, these heavy metals include copper, iron.200 DEG C~450 DEG C humidity provinces
Between, as the Multiple components in catalyst, with flue gas de novo formation occurs for the metal suboxide of predecessor using copper, the iron of chlorine
The chemical reaction , bioxin of bioxin is attached in flying dust leaves boiler body with flue gas, by under separation in bag filter
To enter ash cellar.National Specification, the flying dust as the Domestic refuse incinerator afterbody of dangerous solid waste cannot be with
Meaning disposal, it is necessary to allow access into landfill yard landfill by harmless treatment qualification rear.It can be seen from the above that boiler tail outlet flies
Ash quantity is bigger, it is meant that the operating cost of garbage power plant disposal flying dust is higher, and economy of power plant is poorer.
The membrane type separator that this patent has been connected highly efficient.Flue gas from the outlet of membrane type separator, its temperature is about
Between 500 DEG C~950 DEG C, the temperature province away from the reaction of bioxin de novo formation, greatly reduces by 200 DEG C~450
The flying dust amount of DEG C temperature range, it means that greatly reduce copper, the low-valent metal oxygen of iron in flying dust as catalysts
The content of compound, makes the chlorine element in flue gas lose the condition for the chemical reaction to form bioxin, so as to play suppression bioxin
Generation, the effect for cancelling disposal flying dust operating cost.
Moreover, multistage gas-solid separating device, can extend the burning time of dust, improve after-flame degree, CO discharge capacitys are significantly
Reduce.
At the same time, due to the membrane type separator for having connected highly efficient so that into the cigarette of back-end ductwork heating surface
Gas fly ash content is very low, and boiler fly ash raw emissions can be up to state standards.Thus it is possible, on the one hand, desalinated boiler tail by
Hot face prevents the requirement of abrasion, can improve flow of flue gas speed, the heat exchange efficiency of heating surface be greatly improved, at the beginning of reducing boiler
Investment；On the other hand, since the fly ash content of flue gas in back-end ductwork is very low, flying dust will not form stifled in the region heating surface
Ash and bridging, greatly improved boiler continuous operating time, reduce the boiler start/ stop stage to maintain 850 DEG C of burning temperature of burner hearth
The consumption of degree (hearth combustion of national Specification prevents the mandatory requirement that bioxin generates) and combustion-supporting conventional fossil fuel,
Reduce carbon emission amount；The third aspect, since boiler continuous operating time greatly improved in second aspect, so having delayed boiler
Fatigue Life Expenditure caused by tube wall temperature frequently lifts during frequent start-stop, extends the service life of boiler plant；4th
Aspect, eliminates the setting of boiler tail deduster, reduces initial cost and operating cost.In conclusion improve power plant
Environmental benefit, social benefit, economic benefit.
Alternatively, arrangement convection heating surface, convection heating surface heat exchanger tube relative pitches are equal in back-end ductwork<2.5, flue gas
Flow velocity is between 8~15m/s.In the program, compared with the prior art, the more conventional consumer waste incineration CFB of this patent back-end ductwork
Stove can be arranged to more compact, reduction cost of investment.Wherein described relative pitches, that is, adjacent pipe center of circle pitch and pipe are straight
The ratio in footpath.
Alternatively, membrane type separator is the high temperature membrane type separator of 500 DEG C of operating temperature ＞.
Alternatively, concatenated at cyclone separator upper outlet with membrane type separator.
Alternatively, membrane type separator exit is connected with back-end ductwork.
Alternatively, cleaner need not be set between back-end ductwork and chimney.As further selection, cleaner is
Bag filter and/or electric precipitator.In the program, by the separation of membrane type separator, boiler tail flying dust is greatly decreased,
Flying dust original discharge concentration can reach consumer waste incineration pollutant emission national standard, so afterbody no longer needs cloth bag to remove
Dirt device and/or electric precipitator, reduce further initial cost.
The foregoing main solution of the present invention and further alternatives thereof can be freely combined to form multiple schemes, be this
The scheme that invention can be used and is claimed；And the present invention, between each (non conflicting) selection and between other selections
It can be freely combined.Those skilled in the art can be understood according to the prior art and common knowledge after the present invention program is understood have it is more
Kind combination, is the claimed technical solution of the present invention, does not do exhaustion herein.
Beneficial effects of the present invention：
1. cyclone separator upper outlet is connected with membrane type separator, the separative efficiency of membrane type separator is higher than whirlwind
Separator；The more tiny flying dust not being separated in the flue gas drawn from cyclone separator, its overwhelming majority is in membrane type point
It is separated from device, makes the ash quantity in back-end ductwork less, boiler export flying dust is less, and fly ash content is polluted less than country
Thing discharge standard, without carrying out harmless treatment to flying dust.This reduces the operating cost of power plant, improves economic effect
Benefit.
2. back-end ductwork is arranged in after cyclone separator and membrane type separator, flying dust concentration is extremely low in flue gas, identical
Under the conditions of flue gas the degree of wear of metal is mitigated significantly when flowing through heating surface, it is possible to choose higher flue gas flow rate, carry
High heat exchange efficiency, saves the initial cost of boiler plant.
3. back-end ductwork is arranged in after cyclone separator and membrane type separator, flying dust concentration is extremely low in flue gas, afterbody
Flue is not easy stifled ash, significantly extends boiler continuous operating time.Thus it is possible, on the one hand, unit can be sent in same time period
More electricity；On the other hand, the consumption of boiler start/ stop stage auxiliary fossil fuel is also saved, reduces carbon emission amount, carries
High environmental benefit.The economic benefit of power plant is improved in terms of two above.
4. since continuous operating time greatly improved, damaged so alleviating heat fatigue caused by boiler frequent start-stop
Evil, improves service life of equipment.
5. membrane type separator bottom is not provided with feeding back device, ash-removing mouth is set, controls the ash concentration of burn cycle in stove
And Heat Transfer in Furnace, ensure combustion stability, mitigate the abrasion before membrane type separator.
6. burner hearth bottom sets ash-removing mouth, the clinker of after-flame in stove is discharged.
Brief description of the drawings
Fig. 1 is the device flow diagram of the embodiment of the present invention；
In figure, burner hearth 1, cyclone separator 2, feeding back device 3, membrane type separator 4, back-end ductwork 5.
Embodiment
With reference to specific embodiments and the drawings, the present invention is further illustrated.
Refering to what is shown in Fig. 1, the waste incineration CFB boiler of a kind of cyclone separator and membrane type separation apparatuses in series, including burn
The CFB boiler burner hearth 1 and back-end ductwork 5 of rubbish are burnt, further includes and is sequentially connected in series between 1 exhanst gas outlet of burner hearth and back-end ductwork 5
Cyclone separator 2 and membrane type separator 4.Burner hearth 1 is made of fin panel casing, water cooling wall surface laying castable refractory,
Stokehold water-cooling wall connects with charging gear, coal feeder；Burner hearth 1 is burned by stokehold wall feed, lower furnace portion air distribution, controls stove
The state of incineration firing in thorax, house refuse burn in stove generation partial heat be water cooled wall absorption.Membrane type separator 4
For 500 DEG C of high temperature membrane type separators 4 of operating temperature ＞, to meet high-temperature flue gas environmental work needs and leave bioxin
Generating temperature range needs.Cleaner, such as bag filter and/or electricity need not be set to remove between back-end ductwork 5 and chimney
Dirt.
Burner hearth 1 and 4 bottom of membrane type separator are respectively provided with ash-removing mouth.Wherein 1 bottom of burner hearth sets ash-removing mouth, to discharge
The clinker of the burning generation of burner hearth 1,4 bottom of membrane type separator are not provided with feeding back device, instead ash discharging hole, to discharge envelope
The flying dust that formula separator 4 is caught.This is because the fly ash granule degree separated by membrane type separator 4 is more thin
It is small, and in residing time in furnace long enough, after-flame, if returning again to burner hearth 1, by flue gas directly band flake hearth-tapping 1, not by
Cyclone separator 2 separates, but the membrane type separator 4 connected below again separates, then this part flying dust is in burner hearth 1
Heat transfer is not contributed, and is not only no advantage, but also infinitely increases flue gas flying dust concentration, increases the mill to geometrical boundary material on the way
Damage.
The smoke inlet of cyclone separator 2 is connected with 1 exhanst gas outlet of burner hearth, and its underpart material outlet passes through feeding back device 3
It is connected with burner hearth 1, water-cooling wall upper outlet connection cyclone separator 2,2 bottom of cyclone separator after specific arrangement preferably burner hearth 1
Portion is connected with feeding back device 3, and the outlet of feeding back device 3 returns grey mouth with water-cooling wall lower part after burner hearth 1 and is connected so that burner hearth 1, whirlwind point
Material external circulating system is formed from device 2, feeding back device 3.
The exhanst gas outlet of membrane type separator 4 is connected with back-end ductwork 5, exhanst gas outlet and the membrane type point of cyclone separator 2
Smoke inlet from device 4 is connected, and the gas-solid disngaging efficiency of membrane type separator 4 compares 2 higher of cyclone separator, to divide
From particulate matter more tiny in 2 exiting flue gas of cyclone separator.In the present embodiment, arrangement convection heating surface in back-end ductwork 5,
Convection heating surface includes superheater, economizer and air preheater (if any) in flue.Heating surface absorbs heat in flue gas and is subject to
Utilize, exhaust gas temperature is controlled, in order to boiler rear portion smoke processing system normal operation.And the more conventional life rubbish of convection heating surface
Rubbish burns CFB furnace and is arranged to more compact, and convection heating surface heat exchanger tube relative pitches are equal<2.5, flue gas flow rate 8~15m/s it
Between.
The flow of whole consumer waste incineration disposal is as follows in the present embodiment：
Burn burner hearth 1 to be arranged vertically, rubbish enters burner hearth 1 from stokehold lower part, and the wind that 1 air feed system of burner hearth provides is sent out therewith
Biochemical reaction, the vigorous combustion in burner hearth 1.Water-cooling wall upper outlet connects with cyclone separator 2 after burner hearth 1, separation hearth 1
A large amount of uncombusted materials and flying dust entrained by interior rising flue gas, burner hearth is sent back to by the feeding back device 3 of 2 lower part of cyclone separator
1 continues to participate in burning, forms circulating combustion, while plays the role of maintaining boiler load.Do not separated by cyclone separator 2
Comparatively fine flying dust with flue gas from 2 top of cyclone separator discharge, enter membrane type separator 4, film by turning flue
Formula separator 4 has the separative efficiency of higher than cyclone separator 2.In membrane type separator 4, in these tiny flying dusts
The overwhelming majority separated, more clean flue gas is discharged from 4 top of membrane type separator, enters afterbody by turning flue
Flue 5；The flying dust separated is discharged from 4 bottom ash-removing mouth of membrane type separator.Draw from 4 upper outlet of membrane type separator
Flue-gas temperature, to heating surface heat release, is reduced to exhaust gas temperature heel row by the more clean flue gas gone out in back-end ductwork 5
Go out boiler body.Each heating surface region of boiler absorbs the heat of incineration firing release in boiler, makes boiler feedwater gradually become
Superheated steam, superheated steam carry thermal energy and are sent to Turbo-generator Set acting, and thermal energy is utilized for electric energy for people.
In the present embodiment, there is the membrane type separator of more high separating efficiency due to having connected, therefore flue gas in back-end ductwork
Dust burdening is greatly reduced, and also just reduces the oxide of the copper being attached in flying dust, iron.In this way, in de novo formation bioxin
In 200 DEG C~450 DEG C temperature ranges, catalyst necessary to chlorine element loses chemical reaction, also just loses reaction condition,
The generation of bioxin is inhibited, is conducive to environmental protection and people's health.
In the present embodiment, there is the membrane type separator of more high separating efficiency due to having connected, therefore flue gas in back-end ductwork
Dust burdening is greatly reduced, its content is less than National Emission Standard, and flying dust directly with flue gas emission to air, eliminates rubbish
Rubbish power plant disposes the operating cost of these flying dusts, improves the economy of power plant.
In the present embodiment, there is the membrane type separator of more high separating efficiency due to having connected, therefore flue gas in back-end ductwork
Dust burdening is greatly reduced, and it is grey to solve the problems, such as that heating surface blocks up, and back-end surfaces can be unworthy more compact, and relative pitches are (i.e.
The ratio of adjacent pipe center of circle pitch and pipe diameter)<2.5, flue gas flow rate saves boiler plant between 8~15m/s
Initial cost.
In the present embodiment, there is the membrane type separator of more high separating efficiency due to having connected, therefore flue gas in back-end ductwork
Dust burdening is greatly reduced, and it is grey to solve the problems, such as that heating surface blocks up, significantly extends boiler continuous operating time.Thus it is possible, on the one hand, phase
More electricity can be sent with unit in the period；On the other hand, disappearing for boiler start/ stop stage auxiliary fossil fuel is also saved
Consumption, reduces carbon emission amount, improves environmental benefit；The third aspect, reduces fatigue damage caused by frequent start-stop, extends
The service life of boiler plant.The economic benefit of power plant is improved in terms of three above.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (9)
1. the waste incineration CFB boiler of a kind of cyclone separator and membrane type separation apparatuses in series, including the CFB boiler burnt away the refuse
Burner hearth and back-end ductwork, it is characterised in that：Further include the whirlwind point being sequentially connected in series between burner hearth exhanst gas outlet and back-end ductwork
From device and membrane type separator, burner hearth and membrane type separator bottom are respectively provided with ash-removing mouth, the smoke inlet of cyclone separator with
Burner hearth exhanst gas outlet connects, and its underpart material outlet is connected by feeding back device with burner hearth, the exhanst gas outlet of membrane type separator
It is connected with back-end ductwork, the exhanst gas outlet of cyclone separator is connected with the smoke inlet of membrane type separator, and membrane type separation dress
Put the gas-solid disngaging efficiency higher compared to cyclone separator.
2. the waste incineration CFB boiler of cyclone separator as claimed in claim 1 and membrane type separation apparatuses in series, its feature exist
In：Arrangement convection heating surface, convection heating surface heat exchanger tube relative pitches are equal in back-end ductwork<2.5, flue gas flow rate is in 8~15m/s
Between.
3. the waste incineration CFB boiler of cyclone separator as claimed in claim 1 and membrane type separation apparatuses in series, its feature exist
In：Membrane type separator is the high temperature membrane type separator of 500 DEG C of operating temperature ＞.
4. the waste incineration CFB boiler of cyclone separator as claimed in claim 1 and membrane type separation apparatuses in series, its feature exist
In：Concatenated at cyclone separator upper outlet with membrane type separator.
5. the waste incineration CFB boiler of cyclone separator as claimed in claim 1 and membrane type separation apparatuses in series, its feature exist
In：Membrane type separator exit is connected with back-end ductwork.
6. the waste incineration CFB boiler that two-stage gas-solid separating device as claimed in claim 1 is successively arranged, it is characterised in that：
Cyclone separator bottom sets feeding back device, and feeding back device outlet is connected with the grey mouth that returns of water-cooling wall after burner hearth bottom.
7. the waste incineration CFB boiler that two-stage gas-solid separating device as claimed in claim 1 is successively arranged, it is characterised in that：
Burner hearth and membrane type separator bottom are respectively provided with ash-removing mouth.
8. the waste incineration CFB boiler of cyclone separator as claimed in claim 1 and membrane type separation apparatuses in series, its feature exist
In：Cleaner need not be set between back-end ductwork and chimney.
9. the waste incineration CFB boiler of cyclone separator as claimed in claim 8 and membrane type separation apparatuses in series, its feature exist
In：Cleaner is bag filter and/or electric precipitator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711453414.XA CN107990322A (en) | 2017-12-28 | 2017-12-28 | A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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