CN207778426U - A kind of more feedstock circulation fluidized-bed combustion boilers - Google Patents
A kind of more feedstock circulation fluidized-bed combustion boilers Download PDFInfo
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- CN207778426U CN207778426U CN201820663926.2U CN201820663926U CN207778426U CN 207778426 U CN207778426 U CN 207778426U CN 201820663926 U CN201820663926 U CN 201820663926U CN 207778426 U CN207778426 U CN 207778426U
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Abstract
The utility model belongs to boiler technology field, and in particular to a kind of more feedstock circulation fluidized-bed combustion boilers, including boiler body, the boiler body is for providing fuel combustion space；More raw material conveying devices, more raw material conveying devices are connected with the boiler body, for conveying a variety of combustion materials to the boiler body；Cooled type separator, the cooled type separator are penetrated through with the boiler body, and shutter is equipped in the inlet of the cooled type separator；Feeding back device, the feeding back device are mounted on the lower section of the cooled type separator, and the feeding back device is connected with the cooled type separator, the boiler body respectively, for providing combustion material cycle；Flue gas processing device, the flue gas processing device is connected with the cooled type separator, the boiler body respectively, for providing fume treatment.The utility model has the characteristics that the thermal efficiency is high, stability is strong by installing shutter and more raw material conveying devices.
Description
Technical field
The utility model belongs to boiler technology field, specifically, the utility model is related to a kind of more feedstock circulations to fluidize
Bed boiler.
Background technology
China's energy efficiency is about 33% within 2007,10 percentage points lower than advanced international standard or so.Improve energy effect
Rate fundamentally needs scientific and technological progress and scientific management.Energy conservation is a system engineering with high content of technology, is related to setting
All various aspects such as meter, construction, operation, maintenance, therefore, energy consumption index are the weights for reflecting an enterprise technology level and management level
The overall target wanted.For thermal energy consumption enterprise, boiler is the energy saving link of core in entire heat flow system.Boiler oil
Adaptability, the thermal efficiency, environmental-protecting performance, operational reliability etc. are all important technical indicator, directly affect cost of investment, operation
Cost and profit situation.
Circulating fluidized bed boiler is the highest clean coal combustion technology of industrialization degree.Circulating fluidized bed boiler uses fluidised form
Change burning, primary structure includes that combustion chamber and cycle melt down two large divisions.Operating air velocity is high, enhances the reactions such as burning and desulfurization
Process solves the engineering problems such as the underlying issues such as calorifics, mechanics, materialogy and expansion, abrasion, overtemperature well.In China,
Circulating fluidized bed boiler is the efficient, clean-burning technology that last century the eighties grow up, and has more than ten at home
Year developing history, also have many cases in engineer application, such as application No. is 201610313114.0, the applying date 2016
On May 12, in, the patent application document of entitled circulating fluidized bed boiler, the invention include mainly burner hearth, cyclonic separation
The smoke discharging pipe of the entrance of device, the smoke outlet for connecting burner hearth and cyclone separator, the returning charge mouth and cyclone separator for connecting burner hearth
The returning charge pipeline of discharge gate, the back-end ductwork that is connect with the exhaust port of cyclone separator and be set in back-end ductwork
Selective catalytic reduction system operating, wherein circulating fluidized bed boiler further include be set to multiple in burner hearth by hot cell and
Production ammonia raw material proportioning system for providing from production ammonia raw material to cyclone separator.Although the invention can solve to a certain extent
Pollution problem of the flue gas to environment in burning, but due to the limitation of boiler structure, it is low to cause raw material returning charge reliability, to
The thermal efficiency is low, and circulating fluidized bed boiler burning in the low combustible of independent stable some calorific values that burn is steady in the prior art
Qualitative difference.
According to the above analysis it is found that the circulating fluidized bed boiler of the prior art has the following disadvantages：
1, the circulating fluidized bed boiler of the prior art is due to the limitation of structure, and it is low to cause raw material returning charge reliability, from
And cause the thermal efficiency low；
2, the circulating fluidized bed boiler of prior art poor combustion stability in the low combustible of some calorific values that individually burn.
Utility model content
The utility model provides a kind of more feedstock circulation fluidized-bed combustion boilers, ciculation fluidized in the prior art at least to solve
The technical problem of bed Boiler Stability difference, while the technology that burning in circulating fluid bed boiler efficiency is low in the prior art can also be solved
Problem.
To solve the above-mentioned problems, the utility model provides a kind of more feedstock circulation fluidized-bed combustion boilers, technical solution
It is as follows：
A kind of more feedstock circulation fluidized-bed combustion boilers comprising：Boiler body, the boiler body are empty for providing burning
Between；More raw material conveying devices, more raw material conveying devices are connected with the boiler body, for being conveyed to the boiler body
A variety of combustion materials；Cooled type separator, the cooled type separator is penetrated through with the boiler body, in entering for the cooled type separator
Shutter is installed at mouthful；Feeding back device, the feeding back device are mounted on the lower section of the cooled type separator, the feeding back device
It is connected respectively with the cooled type separator, the boiler body, for the combustion material in the cooled type separator to be recycled to
In the boiler body, combustion material cycle is provided；Flue gas processing device, the flue gas processing device divide with the water cooling respectively
Be connected from device, the boiler body, for providing fume treatment, and using the heat of flue gas to the air inlet of the boiler body into
Row preheating.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The boiler body includes burner hearth, igniting dress
It sets, air blower, air-distribution device and water-steam system；The inner wall of the burner hearth is water-cooling wall；The igniter is mounted on the stove
Inside thorax, for lighting combustion material；The air blower is penetrated through with the burner hearth, for being blown into First air into the burner hearth；
The air-distribution device is located at the bottom of the burner hearth, for being homogenized First air；The water-steam system includes drum and superheater group,
The drum is located at the top of the burner hearth, and the superheater group is connected with the drum, and the superheater group includes level-one mistake
Hot device, two-stage superheater and three-stagesuperheater, the water-steam system is for providing high-temperature steam.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The igniter includes starting combustion under bed
Burner and starting burners；The air-distribution device includes water cooled wind chamber, air distribution plate and secondary air box, the water cooled wind chamber and
For the air distribution plate between the Induct burner and the starting burners, the secondary air box is mounted on institute
It states on the outer wall of burner hearth, and positioned at the top of the starting burners, the secondary air box is equipped with multiple secondary air channels,
Multiple secondary air channels are penetrated through with the burner hearth.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The flue gas processing device includes flue, saves
Coal device, SCR denitration device and air preheater；The flue is connected with the cooled type separator, in the flue from top to bottom
It is sequentially installed with the economizer, the SCR denitration device and the air preheater, the economizer is overheated with the level-one
Device is connected, and the SCR denitration device is connected with the economizer, described air preheater one end and the SCR denitration device phase
Even, the other end is connected with air-introduced machine.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The blade of the shutter is by the water cooling
The inlet of separator tilts down, and the blade is 30 degree to 70 degree with vertical plane angular range.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The inner wall of the cooled type separator is membrane type
Water-cooling wall is equipped with high temperature wear resistant liner on the inside of the fin panel casing.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：More raw material conveying devices include defeated coal
Device, powder conveying apparatus and bulk material adding set；The defeated device for coal is for conveying coal, institute into the boiler body
Defeated device for coal is stated with the boiler body to be connected by coal chute；The powder conveying apparatus is connected with the coal chute, is used for
Flammable powder is conveyed to the coal chute；The bulk material adding set is connected with the defeated device for coal, is used for described defeated
Device for coal conveys bulk combustible.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The defeated device for coal includes coal crusher
And ribbon conveyer, the ribbon conveyer are connected with the coal chute, are used for the coal chute transferring raw material；The coal
Crusher is connected with the ribbon conveyer, and the coal crusher is for being crushed coal.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The bulk material adding set includes steaming
Vapour dryer, bucket conveyor and bulk material collecting tank；The steam drying machine is connected with the boiler body, for drying
Bulk combustible；The bucket conveyor is connected with the steam drying machine, for conveying bulk combustible；The bulk material
Collecting tank is connected with the bucket conveyor, and for receiving bulk combustible, cloth is equipped with below the bulk material collecting tank
Device, the distributing device are connected with the ribbon conveyer, for being distributed bulk combustible to the ribbon conveyer.
Such as above-mentioned more feedstock circulation fluidized-bed combustion boilers, further preferably：The powder conveying apparatus include filtering ponds,
Submersible sewage pump, powder drying machine and storehouse pump；The filtering ponds are used for filter sludge；The submersible sewage pump is connected with the filtering ponds, uses
In extraction sludge；The powder drying machine is connected with the submersible sewage pump, for drying sludge；The storehouse pump and the powder drying
Machine is connected, and the storehouse pump is equipped with Pneumatic conveying pipeline, and the Pneumatic conveying pipeline is connected with the coal chute.
Analysis is the advantages of the utility model with advantageous effect it is found that compared with prior art：
1, more raw material conveying devices of more feedstock circulation fluidized-bed combustion boilers provided by the utility model are used for boiler body
A variety of combustion materials are conveyed, it, can be by the sludge after drying, biomass by installing more raw material conveying devices with boiler matching
Fuel and coal are sent into collocation burning in boiler body simultaneously, exist so as to avoid the independent lower heat of combustion combustible of boiler body
Combustion instability the problem of, improve the stability of the utility model；The inlet of cooled type separator is equipped with shutter, energy
Enough extend residence time of the combustion material particle in boiler body, to improve after-flame degree, and then improves boiler combustion effect
Rate, while the sectional area of cooled type separator entrance can be reduced, to improve the separative efficiency of cooled type separator；Feeding back device energy
Enough so that the combustion material in flue gas recycles, the utilization rate of combustion material is further increased, passes through installation and boiler matching
More raw material conveying devices so that the utility model can burn 1500kcal to the combustion material of 6000kcal calorific values, pass through
Feeding back device and shutter can improve the efficiency of combustion of the utility model so that the thermal efficiency of the utility model reaches 86%
To 90%, meet national environmental protection index, so that the utility model has the characteristics that stability is strong, high combustion efficiency.
2, more feedstock circulation fluidized-bed combustion boilers provided by the utility model are by being arranged powder conveying apparatus and bulk material
Adding set can burn to the sludge of industrial park, house refuse, additionally it is possible to the biomass fuel generated in production
It burns, defeated device for coal so that coal burning is abundant, and sludge can be dried processing and transport in powder conveying apparatus, dissipates
Shape material adding set can add the biomass fuel after drying to defeated device for coal, and plurality of raw materials enters burner hearth by coal chute
It is interior, burning can be stablized in burner hearth, so that the utility model has the characteristics that fuel is applied widely.
3, the blade of louver window of more feedstock circulation fluidized-bed combustion boilers provided by the utility model is inclined to set, and can improve
The separative efficiency of the utility model, cooled type separator inner wall use fin panel casing, can increase the heating surface of the utility model
Product reduces thermal loss, high temperature wear resistant liner is equipped on the inside of fin panel casing, can reduce cost of investment, saving oil
Amount, so that the utility model has the characteristics that saving fuel, startup speed is fast, work efficiency is high.
4, a variety of combustion materials of more feedstock circulation fluidized-bed combustion boilers provided by the utility model can flow on air distribution plate
It is dynamic, stablize burning in burner hearth convenient for a variety of combustion materials, multiple secondary air channels can further increase the combustion of the utility model
Efficiency is burnt, is burnt simultaneously using Induct burner and starting burners, stablizes burning shape convenient for safeguarding in burner hearth
State, so that the utility model has the characteristics that flameholding, high combustion efficiency.
5, the economizer of more feedstock circulation fluidized-bed combustion boilers provided by the utility model can improve steam generation rate, SCR
Denitrification apparatus can reduce the pollution that burning generates；Air preheater can further increase the efficiency of combustion of boiler body, from
And the utility model is made to have the characteristics that the thermal efficiency is high, pollution is small.
Description of the drawings
Fig. 1 is the structural schematic diagram of more feedstock circulation fluidized-bed combustion boilers provided by the utility model.
Fig. 2 is the connection diagram of more raw material conveying devices of the utility model.
In figure：1- air distribution plates；2- starting burners；3- coal chutes；4- water-cooling walls；5- secondary air box；6- two level mistakes
Hot device；7- shutters；8- drums；9- three-stagesuperheaters；10- primary superheaters；11- cooled type separators；12- economizers；13-
SCR denitration device；14- air preheaters；15- feeding back devices；16- Induct burners；17- bucket conveyors；18- steam
Dryer；19- coal crushers；20- ribbon conveyers；21- bulk material collecting tanks；22- distributing devices；23- pneumatic carriers
Road；The storehouses 24- pump；25- powder drying machines；26- submersible sewage pumps；27- filtering ponds.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
As shown in Figure 1, the utility model provides a kind of more feedstock circulation fluidized-bed combustion boilers, include mainly boiler body,
Boiler body is for providing combustion space；More raw material conveying devices, more raw material conveying devices are connected with boiler body, are used for pot
Furnace body conveys a variety of combustion materials；Cooled type separator 11, cooled type separator 11 is penetrated through with boiler body, in cooled type separator 11
Inlet shutter 7 is installed；Feeding back device 15, feeding back device 15 are mounted on the lower section of cooled type separator 11, feeding back device
15 are connected with cooled type separator 11, boiler body respectively, for the combustion material in cooled type separator 11 to be recycled to boiler sheet
In vivo, the cycle of combustion material is provided；Flue gas processing device, flue gas processing device respectively with cooled type separator 11, boiler body
It is connected.
Specifically, the boiler body of more feedstock circulation fluidized-bed combustion boilers provided by the utility model is empty for providing burning
Between, more raw material conveying devices are used to convey a variety of combustion materials to boiler body, by installing the mostly original mating with boiler body
Sludge, biomass fuel and coal after drying can be sent into arrange in pairs or groups in boiler body simultaneously and burnt, to keep away by material conveying device
The problem of having exempted from combustion instability existing for the independent lower heat of combustion combustible of boiler body, improves the stabilization of the utility model
Property；The inlet of cooled type separator 11 is equipped with shutter 7, when the combustion material particle in flue gas, especially bulky grain into
It when entering 11 entrance of cooled type separator, can rebound in twice-cooked stir-frying furnace body after particles collision to shutter 7, continue to participate in burning, from
And residence time of the particle in boiler body is extended, after-flame degree is improved, and then improve boiler combustion efficiency, and lead to
Installation shutter 7 is crossed, the sectional area of 11 entrance of cooled type separator can be reduced, improves flue gas flow rate, to improve water cooling separation
The separative efficiency of device 11；Feeding back device 15 is mounted on the lower section of cooled type separator 11, can separate cooled type separator 11
Combustion material be recycled in boiler body so that the combustion material being mingled in flue gas can recycle, further carry
High combustion material utilization rate；Flue gas processing device is connected with cooled type separator 11, boiler body respectively, can be generated to burning
Flue gas is handled, and reduces the pollution of the utility model, while the heat in flue gas being used.The utility model passes through peace
Dress and the mating more raw material conveying devices of boiler body, can improve fuel stability, and the utility model is fired
1500kcal is burnt to the fuel of 6000kcal calorific values, by installing feeding back device 15 and installing hundred in 11 inlet of cooled type separator
Leaf window 7 can improve the efficiency of combustion of the utility model so that the thermal efficiency of the utility model reaches 86% to 90%, thermal effect
Rate is high, meets national environmental protection index so that the characteristics of the utility model adaptable strong, high combustion efficiency.
Steam is heated for the ease of the utility model, as shown in Figure 1, the boiler body of the utility model includes stove
Thorax, igniter, air blower, air-distribution device and water-steam system；The inner wall of burner hearth is water-cooling wall 4；Igniter is mounted on burner hearth
Inside, for lighting combustion material；Air blower is penetrated through with burner hearth, and for being blown into First air into burner hearth, air-distribution device is located at stove
The bottom of thorax, for being homogenized First air；Water-steam system includes drum 8 and superheater group, and drum 8 is located at the top of burner hearth, overheat
Device group is connected with drum 8, and superheater group includes primary superheater 10, two-stage superheater 6 and three-stagesuperheater 9, and water-steam system is used
In offer high-temperature steam.The burner hearth of the utility model is equipped with igniter and air-distribution device, and air blower is penetrated through with burner hearth, air blast
After the First air that machine is blown into is homogenized by air-distribution device, the combustion material that is fluidized into from the bottom to top in burner hearth so that in burner hearth
High temperature bed material and the combustion material that enters in burner hearth fully fluidize mixing, ensure that combustion material stablizes burning, water in burner hearth
Vapour system includes primary superheater 10, two-stage superheater 6 and three-stagesuperheater 9, can make full use of combustion material burning and generates
Heat steam is heated, to which steam is heated to superheat state, convenient for improving the efficiency of cycle of the utility model,
So that the utility model has the characteristics that convenient for heating.
In order to make the utility model burn convenient for stablizing, as shown in Figure 1, the igniter of the utility model includes being opened under bed
Dynamic burner 16 and starting burners 2；Air-distribution device includes water cooled wind chamber, air distribution plate 1 and secondary air box 5, water cooled wind chamber
And air distribution plate 1, between Induct burner 16 and starting burners 2, secondary air box 5 is mounted on the outer wall of burner hearth
On, and positioned at the top of starting burners 2, secondary air box 5 is equipped with multiple secondary air channels, multiple secondary air channels and burner hearth
Perforation.The water cooled wind chamber of the utility model is connected with air distribution plate 1, and water cooled wind chamber can provide pressure to air distribution plate 1 and be uniformly distributed
Wind pressure provide cold wind to air distribution plate 1 using water cooled wind chamber consequently facilitating a variety of combustion materials flow on air distribution plate 1, can
1 expanded by heating of air distribution plate effectively is avoided, stablizes burning in burner hearth convenient for a variety of combustion materials, multiple secondary air channels are passed through with burner hearth
It is logical, combustion air can be provided into burner hearth, further increase the efficiency of combustion of the utility model；Using Induct burner 16
It burns, the combustion material for the top of air distribution plate 1 that can fully burn and is recycled through feeding back device 15 simultaneously with starting burners 2
The combustion material in thorax is melted down, convenient for safeguarding the stabilization combustion state in burner hearth, so that the utility model has burning steady
Calmly, the characteristics of high combustion efficiency.
For the waste heat for making full use of the utility model burning to generate, and the pollution that burning generates is reduced, as shown in Figure 1,
The flue gas processing device of the utility model includes flue, economizer 12, SCR denitration device 13 and air preheater 14；Flue with
Cooled type separator 11 is connected, and economizer 12, SCR denitration device 13 and air preheater are from top to bottom sequentially installed in flue
14, economizer 12 is connected with primary superheater 10, and SCR denitration device 13 is connected with economizer 12,14 one end of air preheater with
SCR denitration device 13 is connected, and the other end is connected with air-introduced machine.The utility model, can by installing economizer 12 in flue
The heat for fully absorbing high-temperature flue gas in flue improves the steam generation rate of the utility model, to improve the utility model
The thermal efficiency, SCR denitration device 13 is mounted on the lower section of economizer 12, using SCR technology, in catalyst and oxygen
The nitrogen oxides in flue gas in flue can be reduced to nitrogen under the action of gas, to reduce the utility model burning generation
Pollution；The lower section of SCR denitration device 13 is equipped with air preheater 14, air preheater 14 respectively with air-introduced machine, 5 phase of secondary air box
Even, extraneous natural wind can be introduced by air-introduced machine, and the natural wind for entering boiler body is added using the waste heat of flue gas
Heat further increases the utility model so that the heat that reduction is blown into flue gas in natural wind and burner hearth in boiler body is poor
Efficiency of combustion, so that the utility model has the characteristics that the thermal efficiency is high, pollution is small.
In order to improve the working efficiency of the utility model, as shown in Figure 1, the blade of the shutter 7 of the utility model is by water
The inlet of cold separator 11 tilts down, and blade is 30 degree to 70 degree with vertical plane angular range.The blinds of the utility model
The blade of window 7 is inclined to set, and when the bulky grain in flue gas is collided with blade, due to the barrier effect of blade, can make big
Particle returns to burn away in burner hearth, to alleviate the inlet amount of cooled type separator 11, and reduces cooled type separator 11
Feed size, the separation of flue gas and combustion material particle is accelerated, to improve separative efficiency so that the utility model has
The characteristics of work efficiency is high.
In order to make the utility model save fuel, as shown in Figure 1, the inner wall of the cooled type separator 11 of the utility model is film
Formula water-cooling wall is equipped with high temperature wear resistant liner on the inside of fin panel casing.The inner wall of the cooled type separator 11 of the utility model
Using fin panel casing, the heating surface area of the utility model can be increased, reduce the thermal loss of the utility model, film-type water-cooling
High temperature wear resistant liner is installed on the inside of wall, high temperature wear resistant thickness of inner lining is thin, can reduce cost of investment, while having heat conduction
Ability can adapt to faster smoke temperature change, to accelerate the startup speed of boiler body, save Induct burner
16 and starting burners 2 use oil mass so that the utility model have the characteristics that save fuel, start it is fireballing.
In order to expand the fuel scope of application of the utility model, as shown in Fig. 2, more raw material conveying devices of the utility model
Including defeated device for coal, powder conveying apparatus and bulk material adding set；Defeated device for coal is defeated for conveying coal into boiler body
Device for coal is connected with boiler body by coal chute 3；Powder conveying apparatus is connected with coal chute 3, can for being conveyed to coal chute 3
Fire powder；Bulk material adding set is connected with defeated device for coal, for conveying bulk combustible, bulk combustible to defeated device for coal
For blocky or graininess.The utility model, can be by powdery original by the way that powder conveying apparatus and bulk material adding set is arranged
Material and blocky combustible, which are added in boiler body, to burn, so as to sludge, house refuse to industrial park etc. into
Row burning, additionally it is possible to burn to biomass fuels such as the potato peel, the maize pulps that are generated in production so that the utility model has
Have the characteristics that fuel is applied widely.
In order to make the utility model convenient for being conveyed to coal, as shown in Fig. 2, the defeated device for coal of the utility model includes
Coal crusher 19 and ribbon conveyer 20, ribbon conveyer 20 are connected with coal chute 3, are used for 3 transferring raw material of coal chute；Coal
Charcoal crusher 19 is connected with ribbon conveyer 20, and coal crusher 19 is for being crushed coal.The coal crusher of the utility model
19 can be convenient for the broken coal for being processed into a diameter of 8 millimeters or so of bulk coal to improve the contact area of coal and flue gas,
So that coal burning is abundant, coal is conveyed into coal chute 3 through ribbon conveyer 20, hence into boiler body, is convenient for coal
Charcoal carries out continuous uniform conveying so that the utility model has the characteristics that coal convenient for conveying.
In order to make the utility model convenient for being processed transport to bulk material, as shown in Fig. 2, the bulk of the utility model
Material adding set includes steam drying machine 18, bucket conveyor 17 and bulk material collecting tank 21；Steam drying machine 18 and pot
Furnace body is connected, for drying bulk combustible；Bucket conveyor 17 is connected with steam drying machine 18, flammable for conveying bulk
Object；Bulk material collecting tank 21 is connected with bucket conveyor 17, for receiving bulk combustible, 21 lower section of bulk material collecting tank
Equipped with distributing device 22, distributing device 22 is connected with ribbon conveyer 20, for being distributed bulk combustible to ribbon conveyer 20.This reality
It is connected with boiler body with novel steam drying machine 18, the steam that boiler body generates can be utilized to maize pulp, potato peel
Equal biomass fuels are dried, and are delivered to bulk material collecting tank 21 by bucket conveyor 17 after drying, are conveyed using bucket type
Machine 17 is transported, and the bulks combustible such as biomass fuel can be loaded in the transfer hopper of bucket conveyor 17 so that is dissipated
Shape combustible is not easily to fall off, is convenient for the transport of bulk combustible.21 lower section of bulk material collecting tank is equipped with distributing device 22, distributing device
It is made of motor and cloth tray, cloth tray 22 is flabellum shape structure, and motor can drive cloth tray 22 to rotate, consequently facilitating will dissipate
Shape combustible is evenly distributed on the conveyer belt of ribbon conveyer 20 so that the utility model has the spy of transport easy to process
Point.
In order to make the utility model convenient for being processed transport to sludge, as shown in Fig. 2, the powder carry of the utility model
Device includes filtering ponds 27, submersible sewage pump 26, powder drying machine 25 and storehouse pump 24；Filtering ponds 27 are used for filter sludge；Submersible sewage pump 26
It is connected with filtering ponds 27, for extracting sludge；Powder drying machine 25 is connected with submersible sewage pump 26, for drying sludge；Storehouse pump 24 with
Powder drying machine 25 is connected, and storehouse pump 24 is equipped with Pneumatic conveying pipeline 23, and Pneumatic conveying pipeline 23 is connected with coal chute 3.This practicality
Novel filtering ponds 27 can be filtered sludge, effectively filter out the large volume domestic solid waste in sludge, avoid it to boiler
Ontology damages, and submersible sewage pump 26 is mounted on the bottom of filtering ponds 27, can the sludge of filtering ponds 27 be drawn into powder drying
It is dried in machine 25, the sludge after drying is fitted into storehouse pump 24, is added sludge by 24 control Pneumatic conveying pipelines 23 of storehouse pump
Enter in coal chute 3, sludge transport is convenient for, so that the utility model has the characteristics that transport easy to process.
As depicted in figs. 1 and 2, it elaborates below to the course of work of the utility model：
The inboard wall of burner hearth of more feedstock circulation fluidized-bed combustion boilers provided by the utility model is water-cooling wall 4；Bed is lower to start burning
Device 16 and starting burners 2 are mounted on inside burner hearth；Water cooled wind chamber and air distribution plate 1 are located at Induct burner 16 and bed
Between upper startup burner 2, secondary air box 5 is mounted on the outer wall of burner hearth, and is located at the top of starting burners 2, and two
Secondary bellows 5 are equipped with multiple secondary air channels, and multiple secondary air channels are penetrated through with burner hearth；Drum 8 is located at the top of burner hearth, secondary superheater
Device 6 is located in burner hearth, and is connected with drum 8, and three-stagesuperheater 9 is mounted on 11 top of cooled type separator, and is connected with drum 8,
Primary superheater 10 is mounted in flue, and is connected with three-stagesuperheater 9；Cooled type separator 11 is penetrated through with burner hearth, at perforation
Equipped with shutter 7；Feeding back device 15 be mounted on cooled type separator 11 lower section, feeding back device 15 respectively with cooled type separator 11,
Burner hearth is connected, and the air distribution plate 1 for being recycled to the combustion material in cooled type separator 11 in burner hearth provides combustion material and follows
Ring；Flue is connected with cooled type separator 11, and economizer 12, SCR denitration device 13 and sky are from top to bottom sequentially installed in flue
Air preheater 14, economizer 12 are connected with primary superheater 10, and SCR denitration device 13 is connected with economizer 12, air preheater
14 one end are connected with SCR denitration device 13, and the other end is connected with air-introduced machine；More raw material conveying devices include defeated device for coal, powder
Conveying device and bulk material adding set can uniformly convey a variety of combustion materials into burner hearth by coal chute 3.
After starting burners 2 and Induct burner 16 igniting of the utility model, more raw material conveying device energy
A variety of combustion materials are enough conveyed into burner hearth by 3 continuous uniform of coal chute, combustion material is in air blower, water cooled wind chamber and cloth
Under the action of aerofoil 1, fluid motion can occur on air distribution plate 1, and lighted by starting burners 2, to which burning is put
Heat；Multiple secondary air channels can provide combustion air for burning, and the flue gas for generation of burning is mingled with the upward ascension of combustion material particle, cigarette
Gas heat be water cooled respectively wall 4, two-stage superheater 6, drum 8, three-stagesuperheater 9, primary superheater 10, cooled type separator 11,
Economizer 12 and air preheater 14 absorb；The combustion material particle part being mingled in flue gas is at shutter 7 by shutter 7
It returns, reenters stove chamber inner combustion, a part enters in cooled type separator 11, is water cooled separator 11 and separates and is conveyed to
Feeding back device 15 is sent back in burner hearth by feeding back device 15 and is burnt, and is lighted by Induct burner 16, to reach burning
The cycle of raw material；When by flue, the conversion of nitrogen oxides in flue gas can be flue gas by the SCR denitration device 13 in flue
Nitrogen, to reduce the pollution that burning generates；Waste heat in flue gas by air preheater 14 be used for the air inlet to boiler body into
Row heats, combustion-supporting in the air feeding secondary air box 5 after heating, can further save the energy.
Analysis is the advantages of the utility model with advantageous effect it is found that compared with prior art：
1, more raw material conveying devices of more feedstock circulation fluidized-bed combustion boilers provided by the utility model are used for boiler body
A variety of combustion materials are conveyed, it, can be by the sludge after drying, biomass by installing more raw material conveying devices with boiler matching
Fuel and coal are sent into collocation burning in boiler body simultaneously, exist so as to avoid the independent lower heat of combustion combustible of boiler body
Combustion instability the problem of, improve the stability of the utility model；The inlet of cooled type separator is equipped with shutter, energy
Enough extend residence time of the combustion material particle in boiler body, to improve after-flame degree, and then improves boiler combustion effect
Rate, while the sectional area of cooled type separator entrance can be reduced, to improve the separative efficiency of cooled type separator；Feeding back device energy
Enough so that the combustion material in flue gas recycles, the utilization rate of combustion material is further increased, passes through installation and boiler matching
More raw material conveying devices so that the utility model can burn 1500kcal to the combustion material of 6000kcal calorific values, pass through
Feeding back device and shutter can improve the efficiency of combustion of the utility model so that the thermal efficiency of the utility model reaches 86%
To 90%, meet national environmental protection index, so that the utility model has the characteristics that stability is strong, high combustion efficiency.
2, more feedstock circulation fluidized-bed combustion boilers provided by the utility model are by being arranged powder conveying apparatus and bulk material
Adding set can burn to the sludge of industrial park, house refuse, additionally it is possible to the biomass fuel generated in production
It burns, defeated device for coal so that coal burning is abundant, and sludge can be dried processing and transport in powder conveying apparatus, dissipates
Shape material adding set can add the biomass fuel after drying to defeated device for coal, and plurality of raw materials enters burner hearth by coal chute
It is interior, burning can be stablized in burner hearth, so that the utility model has the characteristics that fuel is applied widely.
3, the blade of louver window of more feedstock circulation fluidized-bed combustion boilers provided by the utility model is inclined to set, and can improve
The separative efficiency of the utility model, cooled type separator inner wall use fin panel casing, can increase the heating surface of the utility model
Product reduces thermal loss, high temperature wear resistant liner is equipped on the inside of fin panel casing, can reduce cost of investment, saving oil
Amount, so that the utility model has the characteristics that saving fuel, startup speed is fast, work efficiency is high.
4, a variety of combustion materials of more feedstock circulation fluidized-bed combustion boilers provided by the utility model can flow on air distribution plate
It is dynamic, stablize burning in burner hearth convenient for a variety of combustion materials, multiple secondary air channels can further increase the combustion of the utility model
Efficiency is burnt, is burnt simultaneously using Induct burner and starting burners, stablizes burning shape convenient for safeguarding in burner hearth
State, so that the utility model has the characteristics that flameholding, high combustion efficiency.
5, the economizer of more feedstock circulation fluidized-bed combustion boilers provided by the utility model can improve steam generation rate, SCR
Denitrification apparatus can reduce the pollution that burning generates；Air preheater can further increase the efficiency of combustion of boiler body, from
And the utility model is made to have the characteristics that the thermal efficiency is high, pollution is small.
As known by the technical knowledge, the utility model can pass through other essence without departing from its spirit or the reality of essential feature
Scheme is applied to realize.Therefore, embodiment disclosed above, all things considered are all merely illustrative, and are not only
's.All changes that come within the scope of the invention or equivalents of the invention are by the utility model packet
Contain.
Claims (10)
1. a kind of more feedstock circulation fluidized-bed combustion boilers, which is characterized in that including：
Boiler body, the boiler body is for providing combustion space；
More raw material conveying devices, more raw material conveying devices are connected with the boiler body, for defeated to the boiler body
Send a variety of combustion materials；
Cooled type separator, the cooled type separator are penetrated through with the boiler body, are installed in the inlet of the cooled type separator
There is shutter；
Feeding back device, the feeding back device be mounted on the cooled type separator lower section, the feeding back device respectively with the water
Cold separator, the boiler body are connected, for the combustion material in the cooled type separator to be recycled to the boiler body
It is interior, combustion material cycle is provided；
Flue gas processing device, the flue gas processing device are connected with the cooled type separator, the boiler body respectively.
2. more feedstock circulation fluidized-bed combustion boilers according to claim 1, it is characterised in that：
The boiler body includes burner hearth, igniter, air blower, air-distribution device and water-steam system；The inner wall of the burner hearth is
Water-cooling wall；The igniter is mounted on inside the burner hearth, for lighting combustion material；The air blower is passed through with the burner hearth
It is logical, for being blown into First air into the burner hearth；The air-distribution device is located at the bottom of the burner hearth, for being homogenized First air；
The water-steam system includes drum and superheater group, and the drum is located at the top of the burner hearth, the superheater group with it is described
Drum is connected, and the superheater group includes primary superheater, two-stage superheater and three-stagesuperheater, and the water-steam system is for carrying
For high-temperature steam.
3. more feedstock circulation fluidized-bed combustion boilers according to claim 2, it is characterised in that：
The igniter includes Induct burner and starting burners；
The air-distribution device includes water cooled wind chamber, air distribution plate and secondary air box, and the water cooled wind chamber and the air distribution plate are located at institute
It states between Induct burner and the starting burners, the secondary air box is mounted on the outer wall of the burner hearth,
And positioned at the top of the starting burners, the secondary air box is equipped with multiple secondary air channels, multiple Secondary Airs
Pipe is penetrated through with the burner hearth.
4. more feedstock circulation fluidized-bed combustion boilers according to claim 3, it is characterised in that：
The flue gas processing device includes flue, economizer, SCR denitration device and air preheater；The flue and the water
Cold separator is connected, and the economizer, the SCR denitration device and the air are from top to bottom sequentially installed in the flue
Preheater, the economizer are connected with the primary superheater, and the SCR denitration device is connected with the economizer, the sky
Air preheater one end is connected with the SCR denitration device, and the other end is connected with air-introduced machine.
5. more feedstock circulation fluidized-bed combustion boilers according to claim 1 or 2, it is characterised in that：
The blade of the shutter is tilted down by the inlet of the cooled type separator, the blade and vertical plane angular range
It is 30 degree to 70 degree.
6. more feedstock circulation fluidized-bed combustion boilers according to claim 1 or 2, it is characterised in that：
The inner wall of the cooled type separator is fin panel casing, is equipped in high temperature wear resistant on the inside of the fin panel casing
Lining.
7. more feedstock circulation fluidized-bed combustion boilers according to claim 1 or 2, it is characterised in that：
More raw material conveying devices include defeated device for coal, powder conveying apparatus and bulk material adding set；The defeated coal dress
It sets for conveying coal into the boiler body, the defeated device for coal is connected with the boiler body by coal chute；The powder
Material conveying device is connected with the coal chute, for conveying flammable powder to the coal chute；The bulk material adding set
It is connected with the defeated device for coal, for conveying bulk combustible to the defeated device for coal.
8. more feedstock circulation fluidized-bed combustion boilers according to claim 7, it is characterised in that：
The defeated device for coal includes coal crusher and ribbon conveyer, and the ribbon conveyer is connected with the coal chute, is used
In to the coal chute transferring raw material；The coal crusher is connected with the ribbon conveyer, and the coal crusher is used for
Broken coal.
9. more feedstock circulation fluidized-bed combustion boilers according to claim 8, it is characterised in that：
The bulk material adding set includes steam drying machine, bucket conveyor and bulk material collecting tank；The steam dries
Dry machine is connected with the boiler body, for drying bulk combustible；The bucket conveyor is connected with the steam drying machine,
For conveying bulk combustible；The bulk material collecting tank is connected with the bucket conveyor, for receiving bulk combustible,
Distributing device is equipped with below the bulk material collecting tank, the distributing device is connected with the ribbon conveyer, is used for the band
Formula conveyer is distributed bulk combustible.
10. more feedstock circulation fluidized-bed combustion boilers according to claim 9, it is characterised in that：
The powder conveying apparatus includes filtering ponds, submersible sewage pump, powder drying machine and storehouse pump；The filtering ponds are for filtering dirt
Mud；The submersible sewage pump is connected with the filtering ponds, for extracting sludge；The powder drying machine is connected with the submersible sewage pump, uses
In dry sludge；The storehouse pump is connected with the powder drying machine, and the storehouse pump is equipped with Pneumatic conveying pipeline, the Geldart-D particle
Pipeline is connected with the coal chute.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805895A (en) * | 2019-11-02 | 2020-02-18 | 中能锐赫科技（北京）股份有限公司 | Bottom slag recycling device and method for circulating fluidized bed |
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2018
- 2018-05-04 CN CN201820663926.2U patent/CN207778426U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805895A (en) * | 2019-11-02 | 2020-02-18 | 中能锐赫科技（北京）股份有限公司 | Bottom slag recycling device and method for circulating fluidized bed |
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