CN207880844U - 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 PDF

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Publication number
CN207880844U
CN207880844U CN201721874989.4U CN201721874989U CN207880844U CN 207880844 U CN207880844 U CN 207880844U CN 201721874989 U CN201721874989 U CN 201721874989U CN 207880844 U CN207880844 U CN 207880844U
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membrane type
separator
cyclone separator
burner hearth
series
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蔡文钢
郑军
龚俊
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China Western Power Industrial Co Ltd
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China Western Power Industrial Co Ltd
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Abstract

The utility model discloses the waste incineration CFB boilers of a kind of cyclone separator and 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 being sequentially connected in series between burner hearth exhanst gas outlet and back-end ductwork and membrane type separator, burner hearth and membrane type separator bottom are respectively provided with ash-removing mouth, the smoke inlet of cyclone separator 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 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 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

A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series
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 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, 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.
The membrane type separator that this patent has been connected highly efficient.The flue gas exported from membrane type separator, temperature is about Between 500 DEG C~950 DEG C, the temperature region far from bioxin de novo formation reaction is greatly reduced by 200 DEG C~450 The flying dust amount of DEG C temperature range, it means that greatly reduce the low-valent metal oxygen of copper in flying dust as catalysts, iron The content of compound makes the chlorine element in flue gas lose the condition for the chemical reaction to form bioxin, to play inhibition bioxin Generate, save 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, the membrane type separator due to having connected highly efficient so that enter 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 Degree (hearth combustion of national Specification prevents the mandatory requirement that bioxin generates) and consumption of 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 when 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 improving power plant Environmental benefit, social benefit, economic benefit.
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, membrane type separator is the high temperature membrane type separator of 500 DEG C of operating temperature >.
Alternatively, it is concatenated with membrane type separator at cyclone separator upper outlet by connecting flue.
Alternatively, membrane type separator exit setting connection flue, is connected with back-end ductwork.
Alternatively, it is not necessary that cleaner is arranged 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 tail portion no longer needs cloth bag to remove Dirt device and/or electric precipitator, further reduced 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, between each (non conflicting) selection and and its He can also be freely combined between selecting.Those skilled in the art are after understanding the utility model according to the prior art and public affairs Know that common sense can be illustrated there are many combination, is the claimed technical solution of the utility model, does not do exhaustion herein.
The beneficial effects of the utility model:
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 from the flue gas that cyclone separator is drawn, the overwhelming majority is in membrane type point It is separated from device, keeps the ash quantity in back-end ductwork less, boiler export flying dust is less, and fly ash content is polluted less than country Object discharge standard, without carrying out harmless treatment to flying dust.This reduces the operating costs of power plant, improve 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, tail portion Flue is not easy stifled ash, substantially extends boiler continuous operating time.Thus it is possible, on the one hand, unit can be sent out in same time period More electricity;On the other hand, the consumption for also saving boiler start/ stop stage auxiliary fossil fuel, 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, mitigates the abrasion before membrane type separator.
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;
In figure, burner hearth 1, cyclone separator 2, feeding back device 3, membrane type separator 4, back-end ductwork 5.
Specific implementation mode
The utility model is further described with reference to specific embodiments and the drawings.
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 for burning rubbish, further include being 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, and water cooling wall surface lays 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 >, bioxin is needed and left to meet high-temperature flue gas environmental work Temperature range is generated to need.It is not necessarily to that cleaner is arranged between back-end ductwork 5 and chimney, such as bag filter and/or electricity remove Dirt.
Burner hearth 1 and 4 bottom of membrane type separator are respectively provided with ash-removing mouth.Wherein ash-removing mouth is arranged in 1 bottom of burner hearth, to discharge The clinker that the burning of burner hearth 1 generates, 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 captures.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 detaches, but is detached again by concatenated membrane type separator 4 below, 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 connect 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, specific arrangement is preferably water-cooling wall upper outlet connection cyclone separator 2 after burner hearth 1,2 bottom of cyclone separator 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, convection heating surface is arranged 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 It utilizes, 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 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 connects with cyclone separator 2 after burner hearth 1, chamber furnaced Rise a large amount of uncombusted materials and flying dust entrained by flue gas in thorax 1, is sent back to by the feeding back device 3 of 2 lower part of cyclone separator Burner hearth 1 continues to participate in burning, forms circulating combustion, while playing the role of maintaining boiler load.It is not detached by cyclone separator 2 Comparatively fine flying dust out is discharged with flue gas from 2 top of cyclone separator, and by turning, flue enters membrane type separator 4, membrane type separator 4 has higher separative efficiency than cyclone separator 2.In membrane type separator 4, these are tiny to fly The overwhelming majority in ash is separated, and more clean flue gas is discharged from 4 top of membrane type separator, is entered by turning flue Back-end ductwork 5;The flying dust separated is discharged from 4 bottom ash-removing mouth of membrane type separator.Go out from 4 top of membrane type separator Flue-gas temperature, to heating surface heat release, is reduced to exhaust gas temperature by the more clean flue gas that mouth is drawn in back-end ductwork 5 Heel row goes out boiler body.Each heating surface region of boiler absorbs the heat of incineration firing release in boiler, enables boiler feedwater gradual Become superheated steam, superheated steam carries thermal energy and is sent to Turbo-generator Set acting, is electric energy for people by thermal energy It utilizes.
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, iron that are attached in flying dust.In this way, in de novo formation bioxin In 200 DEG C~450 DEG C temperature ranges, chlorine element loses catalyst necessary to chemical reaction, also just loses reaction condition, The generation for inhibiting bioxin, 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, and 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 solves the problems, such as the stifled ash of heating surface, 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 is solved the problems, such as the stifled ash of heating surface, is substantially extended boiler continuous operating time.Thus it is possible, on the one hand, phase More electricity can be sent out 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 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. 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:It 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 Set the gas-solid disngaging efficiency higher compared to cyclone separator.
2. the waste incineration CFB boiler of cyclone separator as described in claim 1 and membrane type separation apparatuses in series, feature exist In: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 is in 8~15m/s Between.
3. the waste incineration CFB boiler of cyclone separator as described in claim 1 and membrane type separation apparatuses in series, 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 described in claim 1 and membrane type separation apparatuses in series, feature exist In:It is concatenated with membrane type separator at Cyclone outlet.
5. the waste incineration CFB boiler of cyclone separator as described in claim 1 and membrane type separation apparatuses in series, feature exist In:Membrane type separator exit is connected with back-end ductwork.
6. the waste incineration CFB boiler of cyclone separator as described in claim 1 and membrane type separation apparatuses in series, feature exist In: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.
7. the waste incineration CFB boiler of cyclone separator as described in claim 1 and membrane type separation apparatuses in series, feature exist In:Burner hearth and membrane type separator bottom are respectively provided with ash-removing mouth.
8. the waste incineration CFB boiler of cyclone separator as described in claim 1 and membrane type separation apparatuses in series, feature exist In:It is not necessary that cleaner is arranged 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, feature exist In:Cleaner is bag filter and/or electric precipitator.
CN201721874989.4U 2017-12-28 2017-12-28 A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series Active CN207880844U (en)

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CN201721874989.4U CN207880844U (en) 2017-12-28 2017-12-28 A kind of waste incineration CFB boiler of cyclone separator and membrane type separation apparatuses in series

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CN207880844U true CN207880844U (en) 2018-09-18

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