CN107270280A - CFBB and recirculating fluidized bed combined cycle system - Google Patents
CFBB and recirculating fluidized bed combined cycle system Download PDFInfo
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- CN107270280A CN107270280A CN201710653777.1A CN201710653777A CN107270280A CN 107270280 A CN107270280 A CN 107270280A CN 201710653777 A CN201710653777 A CN 201710653777A CN 107270280 A CN107270280 A CN 107270280A
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- Prior art keywords
- air
- economizer
- cfbb
- temperature superheater
- separator
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- 230000003134 recirculating effect Effects 0.000 title claims abstract description 21
- 239000007789 gas Substances 0.000 claims abstract description 56
- 239000002918 waste heat Substances 0.000 claims abstract description 28
- 230000007704 transition Effects 0.000 claims abstract description 24
- 238000011084 recovery Methods 0.000 claims abstract description 22
- 239000000446 fuel Substances 0.000 claims description 24
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 9
- 239000003245 coal Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 4
- 238000010248 power generation Methods 0.000 claims description 3
- 238000013021 overheating Methods 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 18
- 230000000694 effects Effects 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 description 8
- 230000007613 environmental effect Effects 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- 239000003546 flue gas Substances 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 230000009467 reduction Effects 0.000 description 4
- 239000002341 toxic gas Substances 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002551 biofuel Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention belongs to Sector of Cfb Boilers, and in particular to a kind of CFBB and recirculating fluidized bed combined cycle system.The CFBB that the present invention is provided, including burner hearth, the middle part or bottom of burner hearth are provided with transition chamber, and the side of transition chamber is provided with charging aperture, and the lower end of transition chamber is provided with air compartment；The top of burner hearth is provided with exhanst gas outlet, exhanst gas outlet is connected with the first separator, the gas vent of first separator is connected with back-end ductwork, economizer is installed in back-end ductwork, air preheater is installed below economizer, the outlet of air preheater is connected with waste heat recovery pipe, and waste heat recovery pipe is connected with air compartment.The present invention has the thermal efficiency high, and safe and reliable to operation, exhaust heat utilization effect is good, energy-saving and emission-reduction, the advantage that resource is comprehensively utilized.
Description
Technical field
The invention belongs to Sector of Cfb Boilers, and in particular to a kind of CFBB and ciculation fluidized
Bed combined cycle system.
Background technology
Combustion technology of circulating fluidized derives from the catalytic cracking of chemical engineering industry earliest, the purpose is to control ignition temperature,
Make catalyst interval in optimal reaction temperature, improve the utilization rate of catalyst, German LURGI at first uses the technology
To coal-burning boiler, the circulating fluidized-bed boiler Combustion technology of industrial extensive utilization have developed.
Circulating fluidized-bed boiler Combustion technology is rapidly being developed in recent ten years, is a kind of high-efficiency low-pollution cleaning
Combustion technology, is widely used in fields such as generating, industrial production and central heating, and environmental-protecting performance and energy-saving effect and
Stable operation is to ensure the necessary condition that CFBB develops to high parameter, Large Copacity.Relative to traditional fire grate pot
Stove, CFBB have the advantages that efficiently, environmental protection, efficiency high；Relative to coal-powder boiler, CFBB has tool
There is wider array of fuel tolerance.
When burning in circulating fluid bed boiler, substantial amounts of heat is contained in the clinker and flue gas that are discharged, in order to save
The energy, each application producer adopts in various manners to reclaim heat.In addition, the efficiency of combustion to improve boiler, is reduced because burning
Insufficient wasted energy, each application producer also adopts to be transformed boiler in various manners, and reduces two as far as possible
The discharge of the toxic gases such as sulfur oxide, carbon monoxide.
However as continuing to develop for industrial technology, for the requirement also more and more higher of CFBB, and it is existing
Boiler and engineered boiler still have that efficiency of combustion is low, disposal ability is limited, fails to make full use of the waste heat after burning,
The waste of the energy is caused, for macroeconomy balance is upper, the benefit of energy-conservation and bad technical problem.
In consideration of it, special propose the present invention.
The content of the invention
The first object of the present invention is to provide a kind of CFBB, high with the thermal efficiency, safe and reliable to operation,
Exhaust heat utilization effect is good, energy-saving and emission-reduction, the advantage that resource is comprehensively utilized.
The second object of the present invention is to provide a kind of recirculating fluidized bed combined cycle system, and the system includes above-mentioned circulation
Fluidized-bed combustion boiler, it is possible to increase the utilization rate of resource, reduces energy consumption and operating cost, with more preferable economic benefit and ring
Protect benefit.
To achieve the above object, the technical solution adopted by the present invention is：
According to an aspect of the present invention, the present invention provides a kind of CFBB, including burner hearth, the burner hearth
Middle part or bottom are provided with transition chamber, and the side of the transition chamber is provided with charging aperture, and the lower end of the transition chamber is provided with air compartment；
The top of the burner hearth is provided with exhanst gas outlet, and the exhanst gas outlet is connected with the first separator, described first point
Gas vent from device is connected with back-end ductwork, is provided with below economizer, the economizer and installs in the back-end ductwork
There is air preheater, the outlet of the air preheater is connected with waste heat recovery pipe, the waste heat recovery pipe and the air compartment phase
Connection.
As further preferred technical scheme, once air inlet and secondary air inlet, described one are set on the air compartment
Secondary air inlet is connected by an intake stack with an air-intake device, and the secondary air inlet passes through secondary air pipeline and two
Secondary air-intake device connection, the waste heat recovery pipe is connected with an intake stack and secondary air pipeline respectively.
As further preferred technical scheme, the economizer includes the first economizer and the second economizer, described first
It is provided with economizer below the second separator, second economizer and air preheater is installed；
Preferably, material returning device is provided with below second separator, the material returning device is separated with described first respectively
Device is connected with the transition chamber.
As further preferred technical scheme, the charging aperture includes coal class A fuel A charging aperture and clean fuel charging aperture,
The coal class A fuel A charging aperture and clean fuel charging aperture are connected by pipeline with feeder and clean fuel conveying equipment respectively.
As further preferred technical scheme, in addition to high temperature superheater and low temperature superheater, first separator according to
It is secondary to be connected with the high temperature superheater and low temperature superheater；
Preferably, the low temperature superheater and high temperature superheater are arranged in the back-end ductwork；
Preferably, the high temperature superheater single-stage arrangement or multistage arrangement, the high temperature superheater of multistage arrangement include pipe
The medium temperature overheater and high temperature superheater of road connection；
Preferably, the arrangement of the high temperature superheater and low temperature superheater also includes reheater system, the reheating
Device system includes low-temperature reheater and high temperature reheater.
As further preferred technical scheme, in addition to deduster, air-introduced machine and chimney, the back-end ductwork is sequentially connected
Deduster, air-introduced machine and chimney, the deduster are also connected with unloader；
Preferably, the first filter screen is provided between the deduster and air-introduced machine, provided with the between the air-introduced machine and chimney
Two filter screens.
As further preferred technical scheme, in addition to oxygen-eliminating device, the oxygen-eliminating device successively with feedwater pump group and economizer
Connection；
Preferably, the feedwater pump group includes the pre feedwater pump and feed pump being sequentially connected, the pre feedwater pump
Outlet branches pipe is connected with the import of the economizer, and the outlet of the economizer is connected with the heating tube of the oxygen-eliminating device.
According to another aspect of the present invention, the present invention provides a kind of recirculating fluidized bed combined cycle system, including combustion gas
Turbine electricity generation system, steam turbine power generating and CFBB, the CFBB are above-mentioned circulation
Fluidized-bed combustion boiler.
As further preferred technical scheme, gas turbine and recirculating fluidized bed pot in the gas turbine generating system
An intake stack and the connection of secondary air pipeline in stove；
Exhanst gas outlet road connection in steam turbine and recirculating fluidized bed in the steam turbine power generating.
As further preferred technical scheme, the gas turbine connects with an intake stack and secondary air pipeline
Chimney bypass is provided with the pipeline connect；
Preferably, the exhanst gas outlet is connected by main steam line with drum, and the drum is steamed by pipeline with described
Steam turbine is connected.
Compared with prior art, the beneficial effects of the present invention are：
1st, the CFBB that the present invention is provided, sets below transition chamber, transition chamber in the middle and lower part of burner hearth and sets
Air compartment is put, air preheater, the outlet connection waste heat recovery of air preheater are installed in the lower section of the economizer in back-end ductwork
Pipe, and the waste heat recovery pipe connect with air compartment, and then to the cold air progress waste heat of entrance air compartment, not only high combustion efficiency, and
And the waste heat after rate burning is made full use of, the waste of resource is reduced, while the discharge of toxic gas is reduced, with preferable section
Can benefit and environmental benefit.
2nd, the recirculating fluidized bed combined cycle system that the present invention is provided, including gas turbine generating system, steam turbine hair
Electric system and above-mentioned CFBB, the waste heat on the one hand producing CFBB is after steam turbine
For generating electricity, heat can be reclaimed, flue-gas temperature can be reduced again；The exhaust of another aspect gas turbine can enter recirculating fluidized bed
In boiler, as the air-supply of boiler, the thermal efficiency is high, and safe and reliable to operation, resource is comprehensively utilized.Energy consumption is low simultaneously, operation
Expense is low, energy-saving and emission-reduction, environment-friendly.
3rd, invention achieves the waste heat made full use of after burning, it is to avoid the waste of resource, reduces the mesh of energy resource consumption
, energy-saving and emission-reduction, thermal efficiency height, cogeneration of heat and power, the technique effect of reduction enterprise's production cost are realized, satisfaction is carried energetically now
The environmental protection and the requirement of sustainable development advocated, with good economic benefit, social benefit and environmental benefit.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is circulating fluid bed boiler structure schematic diagram provided in an embodiment of the present invention；
Fig. 2 is another circulating fluid bed boiler structure schematic diagram provided in an embodiment of the present invention；
Fig. 3 is recirculating fluidized bed combined cycle system structural representation provided in an embodiment of the present invention.
Icon：1- burner hearths；101- exhanst gas outlets；2- transition chambers；201- charging apertures；3- air compartments；4- first is separated
Device；5- back-end ductworks；6- economizers；The economizers of 61- first；The economizers of 62- second；7- air preheaters；More than 701-
Recovery tubes；Air-intake device of 8-；Intake stack of 801-；9- secondary air devices；901- secondary air pipelines；
10- material returning devices；The separators of 11- second；12- feeders；13- clean fuel conveying equipments；14- high temperature superheaters；15-
Low temperature superheater；16- dedusters；17- air-introduced machines；18- chimneys；19- unloaders；20- oxygen-eliminating devices；21- feedwater pump groups；
211- pre feedwater pumps；212- feed pumps；22- drums；23- gas turbines；24- steam turbines.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " top ", " bottom " " on ", " under ", " left side ",
The orientation or position relationship of the instruction such as " right side ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, merely to just
In the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In a first aspect, present embodiment provides a kind of CFBB, including burner hearth, the middle part of the burner hearth or under
Portion is provided with transition chamber, and the side of the transition chamber is provided with charging aperture, and the lower end of the transition chamber is provided with air compartment；
The top of the burner hearth is provided with exhanst gas outlet, and the exhanst gas outlet is connected with the first separator, described first point
Gas vent from device is connected with back-end ductwork, is provided with below economizer, the economizer and installs in the back-end ductwork
There is air preheater, the outlet of the air preheater is connected with waste heat recovery pipe, the waste heat recovery pipe and the air compartment phase
Connection.
In view of existing CFBB, from overall economic equilibrium for, the benefit of energy-conservation is simultaneously bad, burning
Efficiency is low, and heat utilization efficiency is low, and the waste heat of burning fails to recycle the waste for causing the energy, does not meet and is vigorously advocating at present
Environmental protection and sustainable development requirement.The present embodiment mode can effectively alleviate the circulation of above-mentioned technical problem there is provided a kind of
Fluidized-bed combustion boiler.
Present embodiment is provided for and sent below transition chamber by setting transition chamber at the middle part of burner hearth or bottom
The air compartment that wind apparatus is connected；The lower section of economizer in back-end ductwork is installed by air preheater, the outlet of air preheater
Waste heat recovery pipe is connected, and the waste heat recovery pipe is connected with air compartment, further speaking, the waste heat recovery pipe and air-supply arrangement and wind
The pipeline of room connection connection is connected, and then improves the temperature of the cold wind of feeding, and can reduce strengthens extra pre- on the pipeline
Hot device, not only saves equipment investment, and improves efficiency of combustion, takes full advantage of the waste heat after burning, reduces the wave of resource
Take, while reduce the discharge of toxic gas, it is engineered after boiler thermal output it is high, adaptability extensively, with preferable energy-conservation
Benefit and environmental benefit.
Second aspect, present embodiment also provides a kind of recirculating fluidized bed combined cycle system, including gas turbine power generation
System, steam turbine power generating and CFBB, the CFBB are above-mentioned recirculating fluidized bed pot
Stove.
Existing gas turbine generating system and steam turbine power generating were all originally independent electricity generation systems, wherein firing
What gas-turbine electricity generation system was utilized is clean fuel, and what steam turbine power generating was utilized is to heat water, production by coal burning
Raw high temperature and high pressure steam promotes steam turbine, and then realizes the purpose generated electricity.But existing mode of operation, fail by resource compared with
Good integrates, and causes the wasting of resources, and pollution environment.
To overcome the deficiencies in the prior art, present embodiments provide for a kind of recirculating fluidized bed of good energy-conserving effect
Combined cycle system.The waste heat that on the one hand present embodiment produces CFBB is used to send out after steam turbine
Electricity, can reclaim heat, and flue-gas temperature can be reduced again；The exhaust of another aspect gas turbine can enter CFBB
Interior, as the air-supply of boiler, the thermal efficiency is high, and safe and reliable to operation, resource is comprehensively utilized, while energy consumption is low, operating cost
Low, energy-saving and emission-reduction are environment-friendly.
With reference to specific embodiments and the drawings, the invention will be further described.
Embodiment one
As shown in figure 1, the present embodiment provides a kind of CFBB, including burner hearth 1, the middle part or bottom of burner hearth 1
Provided with transition chamber 2, the side of transition chamber 2 is provided with charging aperture 201, and the lower end of transition chamber 2 is provided with air compartment 3；
The top of burner hearth 1 is provided with exhanst gas outlet 101, and exhanst gas outlet 101 is connected with the first separator 4, the first separator 4
Gas vent be connected with back-end ductwork 5, economizer 6 is installed, it is pre- that the lower section of economizer 6 is provided with air in back-end ductwork 5
Hot device 7, the outlet of air preheater 7 is connected with waste heat recovery pipe 701, and waste heat recovery pipe 701 is connected with air compartment 3.
On above-mentioned embodiment basis, further, once air inlet and secondary air inlet are set on air compartment 3,
Air inlet is connected by an intake stack 801 with an air-intake device 8, and secondary air inlet passes through secondary air pipeline
901 are connected with secondary air device 9, and waste heat recovery pipe 701 connects with an intake stack 801 and secondary air pipeline 901 respectively
Connect.
Present embodiment is connected with an intake stack 801 and secondary air pipeline 901 respectively by waste heat recovery pipe 701
Setting so that the gas entered in burner hearth is heated in advance, can reduce the setting of gas preheater, is saved cost, is conducive to
Fully burning, improves efficiency of combustion, reduces the discharge of toxic gas, and prevents the waste of heat, with higher comprehensive
Close value.
Set by the way that transition chamber is isostructural, the scope of application of boiler oil can be improved, the burning of different fuel is met, protected
Stability, heat-transfer intensity and the boiler efficiency of burning are demonstrate,proved, fuel tolerance is wide, it is easy to operate, flameholding.
Alternatively, the top of burner hearth is provided with least one exhanst gas outlet, for example, can be one, two, three or four.
Further, the Hou Qiang tops of burner hearth set three exhanst gas outlets, and three exhanst gas outlets connect three the respectively
One separator.
Further, the left side wall top of burner hearth sets two exhanst gas outlets, and right-side wall sets two exhanst gas outlets, four
Exhanst gas outlet connects four the first separators respectively.
The first described separator can be cyclone separator.By the setting of multiple exhanst gas outlets, it is applicable to large-scale
Boiler plant, be conducive to improve production efficiency, and separator separative efficiency.
On above-mentioned embodiment basis, further, economizer 6 includes the first economizer 61 and the second economizer
62, the second separator 11 is installed, the lower section of the second economizer 62 is provided with air preheater 7 on first economizer 61；
Preferably, the lower section of the second separator 11 is provided with material returning device 10, material returning device 10 respectively with the first separator 4 and mistake
Room 2 is crossed to be connected.
Pass through the first separator 4, the second separator 11, the first economizer 61, the second economizer 62 and air preheater 7
Setting, be favorably improved separative efficiency and heat transfer effect, and then improve efficiency of combustion, reduction pollution.
On above-mentioned embodiment basis, further, charging aperture 201 includes coal class A fuel A charging aperture and clean fuel
Charging aperture, coal class A fuel A charging aperture and clean fuel charging aperture pass through pipeline and feeder 12 and clean fuel conveying equipment respectively
13 connections.
Described clean fuel can be natural gas, treated coke-stove gas, bio-fuel etc..In present embodiment
Boiler can both burn coal class A fuel A, may also be used for the clean fuel that burns, and the scope of application is wider.
Described feeder at least includes one, can be two, three or four.
On above-mentioned embodiment basis, further, CFBB also includes high temperature superheater 14 and low
Warm superheater 15, the first separator 4 is connected with high temperature superheater 14 and low temperature superheater 15 successively；
Preferably, low temperature superheater 15 and high temperature superheater 14 are arranged in back-end ductwork 5；
Preferably, the single-stage of high temperature superheater 14 arrangement or multistage arrangement, the high temperature superheater of multistage arrangement include pipeline
The medium temperature overheater and high temperature superheater of connection；
Preferably, the arrangement of high temperature superheater 14 and low temperature superheater 15 also includes reheater system, reheater system
System includes low-temperature reheater and high temperature reheater.Further, the reheater system is some bribes by the way that pipeline connection composition is closed
The low-temperature reheater and high temperature reheater bribed.
By high temperature superheater, low temperature superheater, low-temperature reheater, high temperature reheater setting, be favorably improved boiler
The security of operation so that boiler under various loads have preferable atmospheric temperature property, be favorably improved equipment security and
Service life.
On above-mentioned embodiment basis, further, CFBB also includes deduster 16, air-introduced machine 17
With chimney 18, back-end ductwork 5 is sequentially connected deduster 16, air-introduced machine 17 and chimney 18, and deduster 16 is also connected with unloader 19；
Preferably, the first filter screen is provided between deduster 16 and air-introduced machine 17, provided with the between air-introduced machine 17 and chimney 18
Two filter screens.
The material separated from the second separator is on the one hand back to the first separator by material returning device and transition chamber is followed
Ring burns, and on the other hand not separated fine grained enters back-end ductwork with flue gas, in back-end ductwork through low temperature superheater,
After the heat exchange cooling such as high temperature superheater, economizer, chimney is flowed to by deduster, blower fan, is arranged to air.
Alternatively, deduster uses sack cleaner, and cost performance is higher.And setting by the first filter screen and the second filter screen
Put, can further removal of impurities, raising efficiency of dust collection, reduction pollution, it is to avoid larger pollution is caused to air.
As shown in Fig. 2 on above-mentioned embodiment basis, further, CFBB also includes oxygen-eliminating device
20, oxygen-eliminating device 20 is connected with feedwater pump group 21 and economizer 6 successively；
Preferably, feedwater pump group 21 includes the pre feedwater pump 211 and feed pump 212 being sequentially connected, pre feedwater pump 211
Outlet branches pipe be connected with the import of economizer 6, the outlet of economizer 6 is connected with the heating tube of oxygen-eliminating device 20.
Oxygen-eliminating device can not only remove the dissolved oxygen in boiler feedwater, and can remove the carbon dioxide dissociated in water, ammonia,
The corrosive gas such as hydrogen sulfide.By the setting of oxygen-eliminating device, the corruption to equipment such as boiler feedwater pipeline, economizers can be reduced
Erosion, extension device service life.
In the present embodiment, the outlet main line of pre feedwater pump is connected with feed pump, the outlet branches pipe of pre feedwater pump
Be connected with the import of economizer, condensate under the driving of pre feedwater pump, economizer heating and cooled flue gas, recovery it is remaining
Oxygen-eliminating device is heat-fed, is used as deoxygenation heating, and then improves the recovery utilization rate of heat, cost is reduced.
As shown in figure 3, the present embodiment also provides a kind of recirculating fluidized bed combined cycle system, including gas turbine power generation system
System, steam turbine power generating and CFBB, CFBB are above-mentioned CFBB.
On above-mentioned embodiment basis, further, gas turbine 23 and circulation in gas turbine generating system
An intake stack 801 and secondary air pipeline 901 in fluidized-bed combustion boiler are connected；
Steam turbine 24 in steam turbine power generating is connected with the exhanst gas outlet road in recirculating fluidized bed.
CFBB, steam turbine and gas turbine in the present embodiment can isolated operations.
Alternatively, steam turbine is the condensing type steam turbine that draws gas.
Alternatively, gas turbine is combustion-supporting type gas turbine, i.e., by the row of the high temperature of gas turbine, oxygen content about 15%
Gas, is fully entered in CFBB, is used as the air-supply of boiler.Fuel gas temperature, and boiler are further improved in boiler
High-temperature flue gas produces high-temperature high-pressure overheat steam together, and the generating set of driving steam turbine generates electricity.
Alternatively, CFBB is the CFBB of the burner with two-phase double fuel.
On above-mentioned embodiment basis, further, gas turbine 23 and an intake stack 801 and secondary air
Chimney bypass is provided with the pipeline that pipeline 901 is connected；
Preferably, exhanst gas outlet is connected by main steam line with drum 22, and drum 22 passes through pipeline and steam turbine 24
Connection.
The recirculating fluidized bed combined cycle system that present embodiment is provided, has reached the waste heat made full use of after burning, has kept away
Exempt from the waste of resource, reduced the purpose of energy resource consumption, realize energy-saving and emission-reduction, thermal efficiency height, cogeneration of heat and power, the life of reduction enterprise
Produce cost technique effect, meet now advocate energetically environmental protection and sustainable development requirement, with good economic benefit,
Social benefit and environmental benefit.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of CFBB, it is characterised in that including burner hearth, the middle part or bottom of the burner hearth are provided with transition chamber,
The side of the transition chamber is provided with charging aperture, and the lower end of the transition chamber is provided with air compartment；
The top of the burner hearth is provided with exhanst gas outlet, and the exhanst gas outlet is connected with the first separator, first separator
Gas vent be connected with back-end ductwork, economizer is installed in the back-end ductwork, installs free below the economizer
Air preheater, the outlet of the air preheater is connected with waste heat recovery pipe, and the waste heat recovery pipe is connected with the air compartment.
2. CFBB according to claim 1, it is characterised in that once air inlet is set on the air compartment
And secondary air inlet, an air inlet is connected by an intake stack with an air-intake device, the secondary air inlet
Be connected by secondary air pipeline with secondary air device, the waste heat recovery pipe respectively with an intake stack and secondary
Intake stack is connected.
3. CFBB according to claim 1, it is characterised in that the economizer include the first economizer and
It is provided with second economizer, first economizer below the second separator, second economizer and air preheat is installed
Device；
Preferably, be provided with material returning device below second separator, the material returning device respectively with first separator and
The transition chamber is connected.
4. CFBB according to claim 1, it is characterised in that the charging aperture is fed including coal class A fuel A
Mouthful and clean fuel charging aperture, the coal class A fuel A charging aperture and clean fuel charging aperture are respectively by pipeline and feeder and clean
Net fuel hauling equipment connection.
5. CFBB according to claim 1, it is characterised in that also including high temperature superheater and cryogenic overheating
Device, first separator is connected with the high temperature superheater and low temperature superheater successively；
Preferably, the low temperature superheater and high temperature superheater are arranged in the back-end ductwork；
Preferably, the high temperature superheater single-stage arrangement or multistage arrangement, the high temperature superheater of multistage arrangement connect comprising pipeline
The medium temperature overheater and high temperature superheater connect；
Preferably, the arrangement of the high temperature superheater and low temperature superheater also includes reheater system, the reheater system
System includes low-temperature reheater and high temperature reheater.
6. CFBB according to claim 1, it is characterised in that also including deduster, air-introduced machine and chimney,
The back-end ductwork is sequentially connected deduster, air-introduced machine and chimney, and the deduster is also connected with unloader；
Preferably, the first filter screen is provided between the deduster and air-introduced machine, provided with the second filter between the air-introduced machine and chimney
Net.
7. the CFBB according to any one of claim 1~6, it is characterised in that also including oxygen-eliminating device, described
Oxygen-eliminating device is connected with feedwater pump group and economizer successively；
Preferably, the feedwater pump group includes the pre feedwater pump and feed pump being sequentially connected, the outlet of the pre feedwater pump
Branched pipe is connected with the import of the economizer, and the outlet of the economizer is connected with the heating tube of the oxygen-eliminating device.
8. a kind of recirculating fluidized bed combined cycle system, including gas turbine generating system, steam turbine power generating and circulation
Fluidized-bed combustion boiler, it is characterised in that the CFBB is the recirculating fluidized bed described in any one of claim 1~7
Boiler.
9. recirculating fluidized bed combined cycle system according to claim 8, it is characterised in that the gas turbine power generation system
An intake stack and the connection of secondary air pipeline in gas turbine and CFBB in system；
Exhanst gas outlet road connection in steam turbine and recirculating fluidized bed in the steam turbine power generating.
10. recirculating fluidized bed combined cycle system according to claim 9, it is characterised in that the gas turbine and institute
Chimney bypass is provided with the pipeline for stating an intake stack and the connection of secondary air pipeline；
Preferably, the exhanst gas outlet is connected by main steam line with drum, and the drum passes through pipeline and the vapor wheel
Machine is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653777.1A CN107270280A (en) | 2017-08-03 | 2017-08-03 | CFBB and recirculating fluidized bed combined cycle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710653777.1A CN107270280A (en) | 2017-08-03 | 2017-08-03 | CFBB and recirculating fluidized bed combined cycle system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107270280A true CN107270280A (en) | 2017-10-20 |
Family
ID=60076321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710653777.1A Pending CN107270280A (en) | 2017-08-03 | 2017-08-03 | CFBB and recirculating fluidized bed combined cycle system |
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| Country | Link |
|---|---|
| CN (1) | CN107270280A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116839039A (en) * | 2023-06-26 | 2023-10-03 | 蓝途金汇(北京)环保科技有限公司 | Modular assembly type equipment for garbage incineration treatment and energy utilization |
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Effective date of registration: 20180416 Address after: 551108 Yin an village, Wenquan Town, Xifeng County, Guiyang, Guizhou Applicant after: GUIZHOU XIYANG INDUSTRIAL CO.,LTD. Address before: Yin an Cun Wenquan Town of Xifeng County in Guizhou province Guiyang City 550000 Applicant before: GUIZHOU NUOWEISHI BIOLOGICAL ENGINEERING CO.,LTD. |
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