CN207179630U - A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system - Google Patents
A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system Download PDFInfo
- Publication number
- CN207179630U CN207179630U CN201721241810.1U CN201721241810U CN207179630U CN 207179630 U CN207179630 U CN 207179630U CN 201721241810 U CN201721241810 U CN 201721241810U CN 207179630 U CN207179630 U CN 207179630U
- Authority
- CN
- China
- Prior art keywords
- air preheater
- gas
- economizer
- boiler
- flue
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Air Supply (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model discloses a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system, including：High-temperature economizer, low-level (stack-gas) economizer and air preheater；Characterized in that, the air preheater is individually arranged in the bottom of boiler horizontal gas pass；The cold wind air channel of primary and secondary air introduces from the bottom of air preheater respectively, and the feedwater with air preheater Bottomhole pressure carries out heat exchange, and the hot blast after heat exchange is drawn from air preheater top enters burner hearth.The utility model beneficial effect：While exhaust gas temperature, increase flue gas loss is not raised, solve the corrosion of air preheater and economizer and block up grey problem, extend afterbody air preheater service life, improve the ability that biomass boiler is continuously run, reduce thermal pollution, environmental protection.
Description
Technical field
It the utility model is related to biomass recirculating fluidized bed boiler fume afterheat and utilize technical field, more particularly to it is a kind of raw
Material CFBB flue gas waste heat recovery system.
Background technology
It is well known that biomass become with the features such as its abundant raw material, clean environment firendly and advantages of substitution it is most potential
One of power plant's new energy fuel.Due to the features such as biomass fuel calorific value is low, and burning time is short, and moisture is high, cause flue gas
Middle vapor, fly ash content are higher, and this causes the air preheater and the province that are operated in biomass boiler afterbody low-temperature flue gas region
Coal device condition of work is more severe, low-temperature corrosion and stifled ash easily occurs.Once generation low-temperature corrosion and stifled ash, will result in cigarette
Gas channel blockage, air inducing resistance increase, causes air-introduced machine undercapacity.When serious, tube leak can be caused to damage, both added
Maintenance load and spillage of material, the normal operation of boiler is have impact on again, so as to influence safe and economical boiler operation.
Therefore, the corrosion to boiler tail air preheater and economizer and stifled ash are summarized analysis, inquire into solution party
Method, take preventive measures, extend the service life of air preheater and economizer, be to improve the ability that biomass boiler is continuously run
Effective way.
Utility model content
The utility model is asked for the corrosion of the tail air preheater and economizer of biomass fluid bed boiler and stifled ash
Topic, it is proposed that a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system, do not raising exhaust gas temperature, increase smoke evacuation damage
While mistake, solve the corrosion of air preheater and economizer and block up grey problem, extend afterbody air preheater service life, improve
The ability that biomass boiler is continuously run, reduce thermal pollution, environmental protection.
To achieve these goals, the utility model adopts the following technical scheme that：
The utility model discloses a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system, including：High temperature saves
Coal device, low-level (stack-gas) economizer and air preheater；The air preheater is individually arranged in the bottom of boiler horizontal gas pass；First, two
The cold wind air channel of secondary wind introduces from the bottom of air preheater respectively, and the feedwater with air preheater Bottomhole pressure carries out hot friendship
Change, the hot blast after heat exchange is drawn from air preheater top enters burner hearth.
Further, the header introducing fed water from air preheater lower left, it is right from air preheater after heat exchange
The header of top is drawn.
Further, air feeds water in air preheater Bottomhole pressure outside air preheater pipe, is submitted to water and air
Distributary is arranged.
Further, boiler includes：The vertical well gas flue of afterbody first and the vertical well gas flue of afterbody second；
High-temperature economizer is located in the vertical well gas flue of afterbody first, is made up of horizontal tube group, feeds water and enters from the left of boiler
The high-temperature economizer that mouth header is introduced in the vertical well gas flue of afterbody first, then pass through connecting tube from the outlet header on the right side of boiler
Introduce the right end socket of drum.
Further, low-level (stack-gas) economizer is located in the vertical well gas flue of afterbody second, is made up of horizontal tube group；Feedwater is left from boiler
The low-level (stack-gas) economizer that side-entrance header is introduced in the vertical well gas flue of afterbody second, then pass through company from the outlet header on the left of boiler
Adapter introduces high-temperature economizer.
Further, flue gas first passes around the high-temperature economizer in the vertical well gas flue of afterbody first, with high-temperature economizer
Enter the low-level (stack-gas) economizer in the vertical well gas flue of afterbody second after whom carries out heat exchange in pipe, again pass by enter after heat exchange and remove
Dirt device removes the particulate subconstiuent of flue gas, finally extracts boiler out by air-introduced machine, air is discharged into through chimney.
The utility model further discloses a kind of electricity generation system, includes a kind of biomass recirculating fluidized bed boiler flue gas
Residual neat recovering system.
The utility model beneficial effect：
The utility model solves air preheater and economizer while exhaust gas temperature, increase flue gas loss is not raised
Corrosion and block up grey problem, extend afterbody air preheater service life, improve the ability that biomass boiler is continuously run, reduce heat
Pollution, environmental protection.
Brief description of the drawings
Fig. 1 is the utility model flue gas waste heat recovery system layout of equipment；
Fig. 2 is the utility model flue gas waste heat recovery system workflow schematic diagram；
Wherein, 1- boilers；2- high-temperature economizers；3- low-level (stack-gas) economizers；4- air preheaters.
Embodiment
The utility model is further described with embodiment below in conjunction with the accompanying drawings.
The utility model discloses a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system, as shown in figure 1, bag
Include：High-temperature economizer 2, low-level (stack-gas) economizer 3 and air preheater 4.
The boiler 1 is made up of two tail vertical well gas flues, and high-temperature economizer 2 is located therein in the vertical well gas flue of afterbody first,
Be made up of horizontal tube group, feed water from positioned at the left side import header of boiler 1 introduce back-end ductwork in high-temperature economizer 2, then from positioned at
The outlet header on the right side of boiler 1 introduces the right end socket of drum by connecting tube.
For low-level (stack-gas) economizer 3 in wherein in the vertical well gas flue of afterbody second, being made up of horizontal tube group, 2 enclose in-line arrangements.Feedwater from
The left side import header of boiler 1 introduces low-level (stack-gas) economizer 3 in back-end ductwork, then passes through company from the outlet header positioned at the left side of boiler 1
Adapter introduces high-temperature economizer 2.
Air preheater 4 is no longer arranged in the flue tail of boiler 1 as conventional boiler 1, but it is horizontal to be individually arranged in boiler 1
The bottom of flue.So on the one hand design can save space, and on the other hand, air preheater 4 is apart from the secondary hot-air of boiler one
Interface and economizer interface are all close, facilitate pipeline to be connected with boiler.
Air feeds water in Bottomhole pressure outside pipe, is arranged to water and air in cross-current.The cold wind air channel of primary and secondary air
Introduced respectively from air preheater bottom, the feedwater with Bottomhole pressure carries out heat exchange, and the hot blast after heating is drawn from air preheater top
Into burner hearth.Feedwater introduces from air preheater lower left header, is drawn after heat exchange from air preheater upper right side header.
For air preheater 4, low-temperature corrosion is due to can corrosion pipeline containing moisture content, sulfur dioxide etc. in flue gas
Gas, with high-pressure feed water heat a Secondary Air, flue gas is avoided by air preheater, so as to avoid flue gas to the low of air preheater
Temperature corrosion.Air and high-pressure feed water are inherently very clean, so now stifled grey problem is not present in air preheater.
For economizer, it is divided into high-temperature economizer 2 and low-level (stack-gas) economizer 3, can be entered by adjusting high-pressure feed water
The amount of low-level (stack-gas) economizer 3 adjusts the flue gas exit temperature of low-level (stack-gas) economizer 3, that is, can regulate and control the cigarette of low-level (stack-gas) economizer 3
Temperature degree is more than dew point, so as to reduce the etching problem of economizer.
The workflow of Tthe utility model system is as shown in Fig. 2 be divided into Water flow-path and the distinguished and admirable journey of cigarette.
It is to Water flow-path：By high-pressure heater Lai feedwater be divided into two-way：The left side header of one route air preheater 4 enters
Air preheater 4, and exchanged heat wherein with cold air convection, the hot blast by cold air heating into certain temperature.What cold wind was heated
Temperature can be controlled by adjusting the confluent of air inlet preheater 4, and the flue gas exit temperature of flue tail can pass through
Regulation is adjusted into the confluent of low-level (stack-gas) economizer 3.So can both reduce air preheater 4 and economizer low-temperature corrosion and
Dust stratification problem, the flue-gas temperature of discharge can be reduced again, reduce thermal pollution, environmental protection.
Feedwater after cooled is drawn from the upper right side outlet header of air preheater 4, into the inlet header of low-level (stack-gas) economizer 3
Case, horizontally disposed economizer tube group is countercurrently passed upward through, drawn after flue gas from the outlet header of low-level (stack-gas) economizer 3 and another
Feedwater mixing all the way；Another way, which feeds water, is no longer pass through air preheater 4, but the feedwater directly with being heated by low-level (stack-gas) economizer 3
The import header of high-temperature economizer 2 is directly entered after mixing, countercurrently passes upward through horizontally disposed economizer tube group, is saved into high temperature
The outlet header of coal device 2, drawn finally by connecting tube from right side and enter the right end socket of drum.
The distinguished and admirable journey of cigarette：From the combustion air that first and second blower fan bloats after the entrance of the lower inlet of air preheater 4, directly
Heat exchange is carried out with the feedwater with Bottomhole pressure, heated combustion air is changed into flue gas after entering hearth combustion.Flue gas is upward
Move across burner hearth, cyclone separator etc. and enter the back-end surfaces of boiler 1.Flue gas is first passed around positioned at the vertical well gas flue of afterbody first
On high-temperature economizer 2, flue gas flows downward, and washes away the advection heating surface of high-temperature economizer 2, transfers heat to heating surface
After feedwater in pipe, the flue gas that temperature decreases enters the low-level (stack-gas) economizer 3 being located in the vertical well gas flue of afterbody second, flue gas again
Continue to flow downward, wash away the advection heating surface of low-level (stack-gas) economizer 3, after transferring heat to the feedwater in heating surface tube, enter
Enter the particulate subconstiuent that deduster removes flue gas, boiler 1 is finally extracted out by air-introduced machine, air is discharged into through chimney.
The utility model further discloses a kind of electricity generation system, includes above-mentioned biomass recirculating fluidized bed boiler cigarette
Gas residual neat recovering system, or the workflow using biomass recirculating fluidized bed boiler flue gas waste heat recovery system.
It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (7)
1. a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system, including：High-temperature economizer, low-level (stack-gas) economizer and sky
Air preheater；Characterized in that, the air preheater is individually arranged in the bottom of boiler horizontal gas pass；Primary and secondary air it is cold
Wind air channel introduces from the bottom of air preheater respectively, and the feedwater with air preheater Bottomhole pressure carries out heat exchange, through overheat
Hot blast after exchange is drawn from air preheater top enters burner hearth.
2. a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system as claimed in claim 1, it is characterised in that give
Water introduces from the header of air preheater lower left, is drawn after heat exchange from the header in air preheater upper right side.
3. a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system as claimed in claim 1, it is characterised in that empty
Gas feeds water in air preheater Bottomhole pressure outside air preheater pipe, is arranged to water and air in cross-current.
A kind of 4. biomass recirculating fluidized bed boiler flue gas waste heat recovery system as claimed in claim 1, it is characterised in that pot
Stove includes：The vertical well gas flue of afterbody first and the vertical well gas flue of afterbody second；
High-temperature economizer is located in the vertical well gas flue of afterbody first, is made up of horizontal tube group, feeds water from positioned at inlet header on the left of boiler
The high-temperature economizer that case is introduced in the vertical well gas flue of afterbody first, then introduced from the outlet header on the right side of boiler by connecting tube
The right end socket of drum.
5. a kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system as claimed in claim 4, it is characterised in that low
Warm economizer is located in the vertical well gas flue of afterbody second, is made up of horizontal tube group；Feedwater introduces afterbody from import header on the left of boiler
Low-level (stack-gas) economizer in second vertical well gas flue, then high temperature is introduced by connecting tube from the outlet header on the left of boiler and saves coal
Device.
A kind of 6. biomass recirculating fluidized bed boiler flue gas waste heat recovery system as claimed in claim 1, it is characterised in that cigarette
Gas first passes around the high-temperature economizer in the vertical well gas flue of afterbody first, after whom carries out heat exchange in high-temperature economizer pipe
Low-level (stack-gas) economizer into the vertical well gas flue of afterbody second, enter the fine particle that deduster removes flue gas after again passing by heat exchange
Composition, boiler is finally extracted out by air-introduced machine, air is discharged into through chimney.
7. a kind of electricity generation system, it is characterised in that include any biomass circulating fluidized bed pot described in claim 1-6
Furnace flue gas exhaust heat recovery system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721241810.1U CN207179630U (en) | 2017-09-26 | 2017-09-26 | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721241810.1U CN207179630U (en) | 2017-09-26 | 2017-09-26 | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207179630U true CN207179630U (en) | 2018-04-03 |
Family
ID=61748401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721241810.1U Expired - Fee Related CN207179630U (en) | 2017-09-26 | 2017-09-26 | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207179630U (en) |
-
2017
- 2017-09-26 CN CN201721241810.1U patent/CN207179630U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107477564A (en) | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system and method | |
| CN204739568U (en) | Energy saving and emission reduction system that horizontal phase transition heat exchanger and prefix type hydrophily formula GGH unite | |
| CN104832930B (en) | Slag cooling device applicable to dry slag discharge machines and application thereof | |
| CN107420933B (en) | Exhaust-heat primary air heat exchanger system for hot air powder feeding system of ball mill | |
| CN103234364B (en) | Device with griddle and process for generating power by efficiently recycling sinter waste heat | |
| WO2015014233A1 (en) | Circulating fluidized bed boiler having secondary reheat | |
| CN101545676A (en) | High-efficiency energy-saving emission-reduction circulating fluid bed organic heat carrier boiler | |
| CN204611798U (en) | A kind of employing hydronic dried slag removing equipment of low temperature neat stress and furnace cinder cooling device thereof | |
| CN103486563A (en) | Supercritical once-through boiler capable of firing eastern Junggar coal | |
| CN212777312U (en) | Flue gas recirculation system for ultra-supercritical secondary reheating boiler | |
| CN112097287B (en) | Boiler energy-saving and flue gas whitening system, process and application | |
| CN204986988U (en) | Bed boiler fuel detonation suppressant system that damps down is vulcanized in circulation | |
| CN207179630U (en) | A kind of biomass recirculating fluidized bed boiler flue gas waste heat recovery system | |
| CN205579622U (en) | Natural circulation indirect hangs down low -level (stack -gas) economizer | |
| CN105485894A (en) | Pulverized coal type water heating boiler | |
| CN106287687A (en) | A kind of burner flue gas recirculation boiler structure | |
| CN207990606U (en) | A kind of boiler is for exhaust system | |
| CN102889585A (en) | Environment-friendly energy-saving vertical boiling boiler | |
| CN208794393U (en) | A kind of gasification of biomass-combustion side coupling coal-burning boiler | |
| CN206018563U (en) | A kind of W flame boiler waste heat utilization system with furnace bottom hot blast | |
| CN205480967U (en) | Combustor gas recirculation boiler structure | |
| CN205579960U (en) | Buggy boiler | |
| CN204460190U (en) | A kind of low wall temperature heat-transfer surface solves the system that high sodium coal combustion stains | |
| CN215637291U (en) | Air supply system of boiler | |
| CN215294990U (en) | Boiler hot air circulating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180403 Termination date: 20210926 |