CN207880861U - A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series - Google Patents
A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series Download PDFInfo
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- CN207880861U CN207880861U CN201721873456.4U CN201721873456U CN207880861U CN 207880861 U CN207880861 U CN 207880861U CN 201721873456 U CN201721873456 U CN 201721873456U CN 207880861 U CN207880861 U CN 207880861U
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- 239000007787 solid Substances 0.000 title claims abstract description 127
- 238000004056 waste incineration Methods 0.000 title claims abstract description 22
- 239000000779 smoke Substances 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 38
- 239000003546 flue gas Substances 0.000 claims description 37
- 239000007789 gas Substances 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 18
- 238000000926 separation method Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 239000011295 pitch Substances 0.000 claims description 7
- 239000012716 precipitator Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 12
- 239000000428 dust Substances 0.000 description 39
- 239000002956 ash Substances 0.000 description 11
- 239000010813 municipal solid waste Substances 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 7
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 5
- 229910052801 chlorine Inorganic materials 0.000 description 5
- 239000000460 chlorine Substances 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
- 230000000694 effects Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 229910001385 heavy metal Inorganic materials 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 239000002803 fossil fuel Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 210000000038 chest Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 231100000167 toxic agent Toxicity 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 238000012546 transfer Methods 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000010791 domestic waste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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- 230000002459 sustained effect Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Chimneys And Flues (AREA)
Abstract
The utility model discloses a kind of waste incineration CFB boilers of multistage gas-solid separating device arranged in series, including the CFB boiler burner hearth burnt away the refuse and back-end ductwork, further include the N grade gas-solid separating devices being series between burner hearth exhanst gas outlet and back-end ductwork, N is positive integer, and N >=2, burner hearth, second level separator to N grades of gas-solid separating device bottoms are respectively provided with ash-removing mouth, the smoke inlet of the first order gas-solid separating device of N grades of gas-solid separating devices is connect with burner hearth exhanst gas outlet, its underpart material outlet is connected by feeding back device with burner hearth, the exhanst gas outlet of N grades of gas-solid separating devices is connected with back-end ductwork.The utility model 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 utility model is suitable for using domestic waste as the waste incineration CFB boiler of fuel.
Background technology
In recent years, the increasing with country to pollutant control working dynamics, Domestic refuse incinerator tail portion 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
The advantage that stove has furnace grate incomparable.But a large amount 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 the health of people will be damaged by being allowed to discharge in ash；And containing big in flying dust
Heavy metal substance is measured, they are in an unsure state, and are easy to release from flying dust.In order to dispose these flying dusts, rubbish
Power plant has to spend a large amount 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 disposition effect,
It is since the flying dust amount of its burning generation is few, the operating cost that power plant disposes 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.
Utility model content
The purpose of this utility model is that：It proposes a kind of with Di bioxin, the discharge of low dirt, Low investment, low operating cost
Significant advantage waste incineration CFB boiler.
The purpose of this utility model is realized by following technical proposals：
A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series, including the CFB boiler stove burnt away the refuse
Thorax and back-end ductwork, further include the N grade gas-solid separating devices being series between burner hearth exhanst gas outlet and back-end ductwork, and N is just whole
Number, and N >=2, burner hearth, second level gas-solid separating device to N grades of gas-solid separating device bottoms are respectively provided with ash-removing mouth, N grades of gas-solids
The smoke inlet of the first order gas-solid separating device of separator is connect with burner hearth exhanst gas outlet, and its underpart material outlet is by returning
Material device is connected with burner hearth, and the exhanst gas outlet of N grades of gas-solid separating devices is connected with back-end ductwork, the first order to N grades of gas-solids
The smoke inlet of gas-solid separating devices at different levels between separator is connected with the exhanst gas outlet of upper level gas-solid separating device, respectively
The exhanst gas outlet of grade gas-solid separating device is connected with the smoke inlet of next stage gas-solid separating device, and from first order gas solid separation
The gas-solid disngaging efficiency of device to N grades of gas-solid separating devices gradually increases.
In this patent, a large amount of chlorine element is contained in house refuse, contains a certain amount of each heavy metal species simultaneously, with routine
Fossil fuel is entirely different, and house refuse in combustion, can generate colourless, tasteless, transparent solid --- extremely toxic substance
Bioxin, while a large amount 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, separated in deduster into
Enter ash cellar.The flying dust of national Specification, the Domestic refuse incinerator tail portion as dangerous solid waste cannot arbitrarily be located
It sets, it is necessary to allow access into landfill yard landfill by harmless treatment qualification rear.It can be seen that the flying dust amount of boiler tail outlet
It is bigger, it is meant that the operating cost that garbage power plant disposes flying dust is higher, and economy of power plant is poorer.
This patent has been connected highly efficient multistage gas-solid separating device.The flue gas exported from N grades of gas-solid separating devices,
About between 500 DEG C~950 DEG C, the temperature region far from bioxin de novo formation reaction is greatly reduced by 200 its temperature
DEG C~the flying dust amounts of 450 DEG C of temperature ranges, it means that greatly reduce the low price of copper in flying dust as catalysts, iron
The content of metal oxide makes the chlorine element in flue gas lose the condition for the chemical reaction to form bioxin, inhibits to play
Bioxin generates, saves the effect of disposition flying dust operating cost.
Moreover, multistage gas-solid separating device, can extend the burning time of dust, after-flame degree is improved, CO discharge capacitys are significantly
It reduces.
At the same time, due to N grades of highly efficient gas-solid separating devices of having connected so that enter back-end ductwork heating surface
Flue 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, having desalinated boiler tail
Heating surface prevents the requirement of abrasion, can improve flow of flue gas speed, greatly improve the heat exchange efficiency of heating surface, reduce boiler
Initial cost；On the other hand, since the fly ash content of flue gas in back-end ductwork is very low, flying dust will not be formed in the region heating surface
Stifled ash and bridging, greatly improved boiler continuous operating time, reduce the boiler start/ stop stage to maintain 850 DEG C of burnings of burner hearth
Temperature (hearth combustion of national Specification prevents the mandatory requirement that bioxin generates) and consumption of combustion-supporting conventional fossil fuel
Amount, reduces carbon emission amount；The third aspect, since boiler continuous operating time greatly improved in second aspect, so delaying
Fatigue Life Expenditure caused by tube wall temperature frequently lifts when boiler frequent start-stop, extends the service life of boiler plant；
Fourth aspect eliminates the setting of boiler tail deduster, reduces initial cost and operating cost.In conclusion improving electricity
Environmental benefit, social benefit, the economic benefit of factory.
In addition, in CFB boiler, cyclone separator is the key that whole system dress as common gas-solid separating device
It sets, the fuel/fly ash granule not being sufficiently burned in burner hearth needs the separation by cyclone separator, filled using feed back
It puts back into burner hearth to burn away, a process constantly recycled is consequently formed.In CFB boiler, gas-solid separating device (whirlwind point
From device) it is to exist not as the dust-extraction unit on ordinary meaning as the device of crucial feed separation cycle, it is main to rise
To the effect for maintaining burner hearth sustained combustion and maintenance boiler load, therefore, CFB boiler burner hearth is latter linked in the prior art
Cyclone separator all only has level-one, you can meets the needs of feed separation cycle and steady load, without two-stage or more grade gas
Solid separation device exists, and is all that special dust-extraction unit is arranged after back-end ductwork for the dedusting demand on ordinary meaning
(such as bag filter, electric precipitator etc.) is realized.
Alternatively, arrange that 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 of diameter.
Alternatively, gas-solid separating device is the high-temperature gas-solid separator of 500 DEG C of operating temperature ＞.
Alternatively, gas-solid separating device is cyclone separator or the gas-solid separating device of other forms.As further
Selection, gas-solid separating device is cyclone separator.As further selection, two-stage is arranged in cyclone separator.In the program, adopt
With cyclone separator, preferably two-stage is arranged, and can obtain the balance of minimum cost of investment and best flying dust treatment effect.
Alternatively, burner hearth and the second level to N grades of gas-solid separating device bottoms are respectively provided with ash-removing mouth.
Alternatively, first order gas-solid separating device is cyclone separator.Feeding back device is arranged in cyclone separator bottom, returns
The outlet of material device is connected with the grey mouth that returns of water-cooling wall after burner hearth bottom.
Alternatively, it is not necessary that cleaner is arranged between back-end ductwork and chimney.As further selection, cleaner is
Bag filter.In the program, by the separation of N grades of gas-solid separating devices, boiler tail flying dust is greatly decreased, the original row of flying dust
It puts concentration and can reach consumer waste incineration pollutant emission national standard, so tail portion no longer needs deduster, further drop
Low initial cost.
The aforementioned main scheme of the utility model and its each further selection scheme can be freely combined to form multiple schemes,
The scheme that can be used and be claimed for the utility model；And the utility model, (each non conflicting selection) selection between and
It can also be freely combined between other selections.Those skilled in the art are after understanding the utility model according to the prior art
It can be illustrated there are many combination with common knowledge, be the claimed technical solution of the utility model, do not do exhaustion herein.
The beneficial effects of the utility model：
1. first order gas-solid separating device top exhanst gas outlet is connected with second level gas-solid separating device, the second level to N
The separative efficiency of grade gas-solid separating device is higher than the first order；It is not separated from the flue gas that first order gas-solid separating device is drawn
More tiny flying dust, the overwhelming majority is separated in gas-solid separating device below, makes the ash in back-end ductwork
Amount is less, and boiler export flying dust is few.Cost of disposal which offers a saving boiler export as the flying dust of hazardous waste reduces
The operating cost of power plant；Save the initial cost and its operating cost of bag filter.In conclusion pot proposed by the present invention
Furnace interior flying dust treating system improves economy of power plant benefit.
2. back-end ductwork is arranged in after the gas-solid separating device of plural serial stage, flying dust concentration is extremely low in flue gas, identical item
The degree of wear of metal is mitigated significantly when flue gas flows through heating surface under part, it is possible to choose higher flue gas flow rate, improve
Heat exchange efficiency, saves the initial cost of boiler plant.
3. back-end ductwork is arranged in after N grades of concatenated gas-solid separating devices, flying dust concentration is extremely low in flue gas, back-end ductwork
It is not easy stifled ash, substantially extends boiler continuous operating time.Thus it is possible, on the one hand, unit can be sent out more in same time period
Electricity；On the other hand, the consumption for also saving boiler start/ stop stage auxiliary fossil fuel, reduces carbon emission amount, improves
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. the second level to N grades of separator bottoms are not provided with feeding back device, ash-removing mouth is set, controls burn cycle in stove
Ash concentration and Heat Transfer in Furnace ensure combustion stability, mitigate the abrasion in back-end surfaces region.
6. ash-removing mouth is arranged in burner hearth bottom, the clinker of after-flame in stove is discharged.
Description of the drawings
Fig. 1 is the device flow diagram of the utility model embodiment 1；
In figure, burner hearth 1, first order gas-solid separating device 2, feeding back device 3, second level gas-solid separating device 4, back-end ductwork
5, the third level is to N grades of gas-solid separating devices 6.
Fig. 2 is the device flow diagram of the utility model embodiment 2；
In figure, burner hearth 1, first order cyclone separator 2, feeding back device 3, second level cyclone separator 4 and back-end ductwork 5.
Specific implementation mode
The utility model is further described with reference to specific embodiments and the drawings.
Embodiment one：
Refering to what is shown in Fig. 1, a kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series, including burn rubbish
The CFB boiler burner hearth 1 and back-end ductwork 5 of rubbish further include the N grade gas-solids being series between 1 exhanst gas outlet of burner hearth and back-end ductwork 5
Separator.Burner hearth 1 is made of fin panel casing, and water cooling wall surface lays castable refractory, stokehold water-cooling wall and charging gear,
Coal feeder connects；Burner hearth 1 is burned by stokehold wall feed, lower furnace portion air distribution, controls the state of incineration firing in burner hearth, it is raw
Burn in the stove partial heat of generation of rubbish living is water cooled wall absorption.Gas-solid separating device is the height of 500 DEG C of operating temperature ＞
Wet solid separation device needs and leaves bioxin to generate temperature range needs to meet high-temperature flue gas environmental work.Tail portion
It is not necessary that cleaner, such as bag filter and/or electric precipitator is arranged between flue 5 and chimney.
Burner hearth 1, second level gas-solid separating device 4 to the third level to N grades of 6 bottoms of gas-solid separating device are all provided with storing ash
Mouthful.Wherein 1 bottom of burner hearth be arranged ash-removing mouth, to discharge burner hearth 1 burning generate clinker, second level gas-solid separating device 4 to
N grades of 6 bottoms of gas-solid separating device are not provided with feeding back device, instead ash discharging hole, to discharge by the later gas-solid of the first order
The flying dust that separator captures.This is because the fly ash granule degree separated by the later gas-solid separating device of the first order
It is more tiny, and in residing time in furnace long enough, after-flame, direct with flake hearth-tapping by flue gas if returning again to burner hearth 1
1, it is not detached by first order gas-solid separating device 2, but detached again by concatenated gas-solid separating device below, then this part
Flying dust does not contribute heat transfer in burner hearth 1, is not only no advantage, but also infinitely increases flue gas flying dust concentration, increases to several on the way
The abrasion of what border material.
The smoke inlet of the first order gas-solid separating device 2 of N grades of gas-solid separating devices is connect with 1 exhanst gas outlet of burner hearth,
Lower part material outlet is connected by feeding back device 3 with burner hearth 1, and specific arrangement is preferably water-cooling wall upper outlet connection after burner hearth 1
First order gas-solid separating device 2,2 bottom of first order gas-solid separating device are connected with feeding back device 3, the outlet of feeding back device 3 and stove
Water-cooling wall lower part returns grey mouth and is connected after thorax 1 so that burner hearth 1, first order gas-solid separating device 2, feeding back device 3 are formed outside material and followed
Loop system.
The exhanst gas outlet of N grades of gas-solid separating devices 6 is connected with back-end ductwork 5, first order gas-solid separating device 2 to N
The exhanst gas outlet of the smoke inlet and upper level gas-solid separating device of gas-solid separating devices at different levels between grade gas-solid separating device 6
It is connected, the exhanst gas outlet of gas-solid separating devices at different levels is connected with the smoke inlet of next stage gas-solid separating device, and from the first order
The gas-solid disngaging efficiency of gas-solid separating device 2 to N grades of gas-solid separating devices 6 gradually increases, to detach upper level separator
More tiny particulate matter in exiting flue gas, the particulate matter separated by the second level to N grades of gas-solid separating devices is by dividing
Ash discharging hole discharge from device bottom.In the present embodiment, convection heating surface is arranged in back-end ductwork 5, convection heating surface packet in flue
Containing superheater, economizer and air preheater (if any).Heating surface absorbs heat in flue gas and is used, and controls exhaust gas temperature,
In order to boiler rear portion smoke processing system normal operation.And the more conventional consumer waste incineration CFB furnace of convection heating surface is arranged to
More compact, convection heating surface heat exchanger tube relative pitches are equal<2.5, flue gas flow rate is between 8~15m/s.
The flow of entire consumer waste incineration disposition is as follows in the present embodiment：
It burns burner hearth 1 to be arranged vertically, rubbish enters burner hearth 1 from stokehold lower part, and the air quantity that 1 air feed system of burner hearth provides is therewith
It chemically reacts, the vigorous combustion in burner hearth 1.Water-cooling wall upper outlet and 2 phase of first order gas-solid separating device after burner hearth 1
It connects, rises a large amount of uncombusted materials and flying dust entrained by flue gas in separation hearth 1, by under first order gas-solid separating device 2
The feeding back device 3 in portion sends burner hearth 1 back to and continues to participate in burning, forms circulating combustion, while playing the role of maintaining boiler load.Not
The comparatively fine flying dust separated by first order gas-solid separating device 2 is with flue gas from 2 flue gas of first order gas-solid separating device
Outlet discharge, into second level gas-solid separating device 4, second level gas-solid separating device 4 has than first order gas-solid separating device 2
Higher separative efficiency.In second level gas-solid separating device 4, the overwhelming majority in these tiny flying dusts is separated,
More clean flue gas is discharged from 4 exhanst gas outlet of second level gas-solid separating device, into third level gas-solid separating device, with such
It pushes away, until N grades.N grades of 6 exhanst gas outlets of gas-solid separating device connect with back-end ductwork 5, thus flue gas enters back-end ductwork 5；
The flying dust separated is from second level gas-solid separating device 4 to N grades of 6 bottom ash-removing mouth discharges of gas-solid separating device.In the past
The more clean flue gas that face N grades of gas-solid separating device upper outlet is drawn in back-end ductwork 5 to heating surface heat release, by flue gas
Temperature is reduced to exhaust gas temperature heel row to go out boiler body.Each heating surface region of boiler absorbs incineration firing release in boiler
Heat, enable boiler feedwater gradually become the superheated steam of nominal parameter, superheated steam carries thermal energy and is sent to turbine generator
Unit does work, and is that electric energy is utilized for people by thermal energy.
In the present embodiment, due to the multistage gas-solid separating device with more high separating efficiency of having connected, therefore in back-end ductwork
Flue gas dust burdening is greatly reduced, this also just reduces the oxide of the copper, iron that are attached in flying dust.In this way, in de novo formation two
In 200 DEG C of Evil English~450 DEG C of temperature ranges, chlorine element loses catalyst necessary to chemical reaction, also just loses anti-
Answer condition, it is suppressed that the generation of bioxin is conducive to environmental protection and people's health.
In the present embodiment, due to the multistage gas-solid separating device with more high separating efficiency of having connected, therefore in back-end ductwork
Flue gas dust burdening is greatly reduced, and the original discharge concentration of particulate matter can reach the standard of pollutant emission in boiler export flue gas
It is required that these minute quantity flying dusts enter air together with flue gas, thus reduce garbage power plant dispose the operations of these flying dusts at
This, improves the economy of power plant.
In the present embodiment, there is the gas-solid separating device of more high separating efficiency due to having connected, therefore flue gas in back-end ductwork
Dust burdening is greatly reduced, and the flying dust original discharge concentration of boiler is made to reach the national standard of consumer waste incineration pollutant emission,
Save the initial cost and its operating cost of boiler tail deduster.
In the present embodiment, due to the multistage gas-solid separating device with more high separating efficiency of having connected, therefore in back-end ductwork
Flue gas dust burdening is greatly reduced, and solves the problems, such as that the stifled ash of heating surface, back-end surfaces can be arranged to more compact, relative pitches
(i.e. the ratio of adjacent pipe center of circle pitch and pipe diameter) is equal<2.5, flue gas flow rate saves boiler between 8~15m/s
Investment of equipment.
In the present embodiment, in back-end ductwork, there is the multistage gas-solid separating device of more high separating efficiency due to having connected,
So that flue gas dust burdening is greatly reduced, solves the problems, such as the stifled ash of heating surface, substantially extend boiler continuous operating time.In this way, one
Aspect, unit can send out more electricity in same time period；On the other hand, the auxiliary fossil combustion of boiler start/ stop stage is also saved
The consumption of material, reduces carbon emission amount, improves environmental benefit；The third aspect, fatigue damage caused by reducing frequent start-stop
Evil, extends the service life of boiler plant；Fourth aspect, due to being arranged more highly efficient than first order gas-solid separating device the
Two level gas-solid separating device so that flue gas dustiness when leaving boiler body has reached the requirement of discharge standard, so section
The initial cost and operating cost of tail portion dust pelletizing system are saved.Above four aspects improve the economic benefit of power plant.
Embodiment two：
Refering to what is shown in Fig. 2, the present embodiment is substantially the same manner as Example 1, difference lies in gas-solid separating device is whirlwind point
From device, and two-stage, i.e. first order cyclone separator 2 and second level cyclone separator 4 is arranged in cyclone separator.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (9)
1. a kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series, including the CFB boiler burner hearth burnt away the refuse
And back-end ductwork, it is characterised in that：It further include the N grade gas solid separations dress being series between burner hearth exhanst gas outlet and back-end ductwork
It sets, N is positive integer, and N >=2, burner hearth, second level gas-solid separating device to N grades of gas-solid separating device bottoms are all provided with storing ash
Mouthful, the smoke inlet of the first order gas-solid separating device of N grades of gas-solid separating devices is connect with burner hearth exhanst gas outlet, its underpart material
Outlet is connected by feeding back device with burner hearth, and the exhanst gas outlet of N grades of gas-solid separating devices is connected with back-end ductwork, and the first order is extremely
The flue gas of the smoke inlet and upper level gas-solid separating device of gas-solid separating devices at different levels between N grades of gas-solid separating devices goes out
Mouthful it is connected, the exhanst gas outlet of gas-solid separating devices at different levels is connected with the smoke inlet of next stage gas-solid separating device, and from first
The gas-solid disngaging efficiency of grade gas-solid separating device to N grades of gas-solid separating devices gradually increases.
2. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as described in claim 1, it is characterised in that：
Arrange that convection heating surface, convection heating surface heat exchanger tube relative pitches are equal in back-end ductwork<2.5, flue gas flow rate 8~15m/s it
Between.
3. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as described in claim 1, it is characterised in that：
Gas-solid separating device is the high-temperature gas-solid separator of 500 DEG C of operating temperature ＞.
4. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as described in claim 1, it is characterised in that：
First order gas-solid separating device is cyclone separator.
5. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as claimed in claim 4, it is characterised in that：
Feeding back device is arranged in cyclone separator bottom, and feeding back device outlet is connected with the grey mouth that returns of water-cooling wall after burner hearth bottom.
6. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as described in claim 1, it is characterised in that：
Burner hearth and the second level to N grades of gas-solid separating device bottoms are respectively provided with ash-removing mouth.
7. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as described in claim 1, it is characterised in that：
Gas-solid separating device is cyclone separator, and two-stage is arranged in cyclone separator.
8. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as described in claim 1, it is characterised in that：
It is not necessary that cleaner is arranged between back-end ductwork and chimney.
9. the waste incineration CFB boiler of multistage gas-solid separating device arranged in series as claimed in claim 8, it is characterised in that：
Cleaner is bag filter and/or electric precipitator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721873456.4U CN207880861U (en) | 2017-12-28 | 2017-12-28 | A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721873456.4U CN207880861U (en) | 2017-12-28 | 2017-12-28 | A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series |
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| Publication Number | Publication Date |
|---|---|
| CN207880861U true CN207880861U (en) | 2018-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721873456.4U Withdrawn - After Issue CN207880861U (en) | 2017-12-28 | 2017-12-28 | A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207880861U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006685A (en) * | 2017-12-28 | 2018-05-08 | 华西能源工业股份有限公司 | A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series |
| CN108006685B (en) * | 2017-12-28 | 2024-06-21 | 华西能源工业股份有限公司 | Multistage gas-solid separation device series arrangement's msw incineration CFB boiler |
-
2017
- 2017-12-28 CN CN201721873456.4U patent/CN207880861U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108006685A (en) * | 2017-12-28 | 2018-05-08 | 华西能源工业股份有限公司 | A kind of waste incineration CFB boiler of multistage gas-solid separating device arranged in series |
| CN108006685B (en) * | 2017-12-28 | 2024-06-21 | 华西能源工业股份有限公司 | Multistage gas-solid separation device series arrangement's msw incineration CFB boiler |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180918 Effective date of abandoning: 20240621 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180918 Effective date of abandoning: 20240621 |