CN108534161A - A kind of biomass boiler back-end ductwork structure - Google Patents
A kind of biomass boiler back-end ductwork structure Download PDFInfo
- Publication number
- CN108534161A CN108534161A CN201810504555.8A CN201810504555A CN108534161A CN 108534161 A CN108534161 A CN 108534161A CN 201810504555 A CN201810504555 A CN 201810504555A CN 108534161 A CN108534161 A CN 108534161A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- air preheater
- temperature flue
- temperature
- low
- 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.)
- Pending
Links
- 239000002028 Biomass Substances 0.000 title claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical group [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 82
- 239000003546 flue gas Substances 0.000 claims abstract description 82
- 239000007789 gas Substances 0.000 claims abstract description 12
- 239000004744 fabric Substances 0.000 claims 1
- 239000000446 fuel Substances 0.000 abstract description 5
- 239000000428 dust Substances 0.000 description 7
- 238000013517 stratification Methods 0.000 description 7
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The present invention relates to biomass fuel mesohigh boiler air preheaters,Economizer field,Specially a kind of biomass boiler back-end ductwork structure,Its is compact-sized,It occupies little space,It can obtain the hot wind of higher temperature,It includes back-end ductwork,It is sequentially disposed with high-temperature economizer from top to bottom in the back-end ductwork,Air preheater and low-level (stack-gas) economizer,It is characterized in that,The air preheater in the back-end ductwork is flue gas air preheater,The flue gas air preheater includes high-temperature flue gas air preheater and low-temperature flue gas air preheater,The connection of low-temperature flue gas air preheater side is located at the steam-type air preheater outside the back-end ductwork,The low-temperature flue gas air preheater other side is connected to cover by outside and is connected to high-temperature flue gas air preheater one end,The high-temperature flue gas air preheater other end is connected to burner hearth,The steam-type air preheater heats the air being passed through.
Description
Technical field
The present invention relates to biomass fuel mesohigh boiler air preheater, economizer field, specially a kind of biomass
Boiler back end ductwork structure.
Background technology
With biomass fuel boiler the market demand is complied with to develop to be getting faster, the type boiler there are the problem of it is also more next
It is more notable, especially back-end surfaces dust stratification and etching problem.Especially high parameter boiler, feed temperature are generally higher（215
DEG C or so）, to improve boiler thermal efficiency, need to control exhaust gas temperature at 130 DEG C hereinafter, because economizer feed temperature is high,
Exhaust gas temperature is reduced, air preheater must be just arranged at smoke evacuation.But due to biomass fuel contain more alkali metal and
Chlorion is easy to cause dust stratification and low-temperature corrosion to air reheater, especially during boiler startup, because of load
It is low, flue-gas temperature is low, just more serious to the dust stratification of air preheater.And general soot blower to the soot blowing effect of biomass fuel not
Greatly, so with boiler continuous service, the dust stratification of air preheater is also increasingly severe, until blowing out is cleaned.
There is the design being arranged in air preheater outside flue at present, flue gas is avoided by the method that air is heated in water supply
Dust stratification and low-temperature corrosion, but its is complicated, volume is big, and hot-air wind pushing temperature is limited by feed temperature to be difficult to obtain more
High numerical value.
Invention content
In order to solve existing structure complexity, the problem of volume is big, and wind pushing temperature is restricted, the present invention provides a kind of lifes
Substance boiler back end ductwork structure, it is compact-sized, it occupies little space, the hot wind of higher temperature can be obtained.
Its technical solution is such：A kind of biomass boiler back-end ductwork structure comprising back-end ductwork, the tail portion
High-temperature economizer, air preheater and low-level (stack-gas) economizer are sequentially disposed in flue from top to bottom, which is characterized in that the back-end ductwork
The interior air preheater is flue gas air preheater, and the flue gas air preheater includes high-temperature flue gas air preheater and low-temperature flue gas air preheater,
The connection of low-temperature flue gas air preheater side is located at the steam-type air preheater outside the back-end ductwork, and the low-temperature flue gas is empty pre-
The device other side is connected to cover by outside and is connected to high-temperature flue gas air preheater one end, the high-temperature flue gas air preheater other end connection
Burner hearth, the steam-type air preheater heat the air being passed through.
It is further characterized by the high-temperature flue gas air preheater includes that First air high-temperature flue gas air preheater and Secondary Air are high
Warm flue gas air preheater, the low-temperature flue gas air preheater include corresponding First air low-temperature flue gas air preheater and Secondary Air low-temperature flue gas
Air preheater, the external connection cover include that the connection First air low-temperature flue gas air preheater and the First air high-temperature flue gas are empty pre-
The First air circuit of device, the Secondary Air of connection the Secondary Air low-temperature flue gas air preheater and the Secondary Air high-temperature flue gas air preheater
Circuit；
The high-temperature economizer includes two arranged up and down with the low-level (stack-gas) economizer.
After adopting the structure of the invention, steam-type air preheater is arranged in outside back-end ductwork, it is existing effectively prevents corrosion
As, and heated air is sent into low-temperature flue gas air preheater in back-end ductwork, by flue gas to certain temperature, then
Hot-air is further heated by high-temperature flue gas air preheater, the hot wind for obtaining higher temperature is sent into burner hearth, to improve efficiency of combustion,
It is empty pre- to be only provided with steam-type outside back-end ductwork for the problems such as flue-gas temperature is cooled down simultaneously, and there is no ash deposits corrosions
Device, it is compact-sized, it occupies little space.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Specific implementation mode
As shown in Figure 1, a kind of biomass boiler back-end ductwork structure comprising back-end ductwork 1, back-end ductwork 1 are interior from upper
Sequentially there are two high-temperature economizer 2, flue gas air preheater and two low-level (stack-gas) economizers 3 for arrangement under, and flue gas air preheater includes from upper
To the Secondary Air high-temperature flue gas air preheater 4 of lower arrangement, First air high-temperature flue gas air preheater 5,6 and of First air low-temperature flue gas air preheater
Secondary Air low-temperature flue gas air preheater 7, First air low-temperature flue gas air preheater 6, the connection of 7 side of Secondary Air low-temperature flue gas air preheater are located at
Steam-type air preheater 8 outside back-end ductwork 1, First air low-temperature flue gas air preheater 6, Secondary Air low-temperature flue gas air preheater 7 are another
Side is connected to First air high-temperature flue gas air preheater 5, Secondary Air by external First air connection cover, Secondary Air pipeline connection cover respectively
4 one end of high-temperature flue gas air preheater, First air high-temperature flue gas air preheater 5,4 other end of Secondary Air high-temperature flue gas air preheater are connected to stove
Thorax is sent into hot wind to burner hearth, and steam-type air preheater 8 heats the air being passed through.
Flue gas from boiler body（460 DEG C or so of temperature）, by high-temperature economizer 2, flue gas temperature after supercooling
At 260 DEG C or so；It is exchanged heat again by Secondary Air high-temperature flue gas air preheater 4 and First air high-temperature flue gas air preheater 5, until smoke temperature
220 DEG C or so；It again passes by First air low-temperature flue gas air preheater 6 and Secondary Air low-temperature flue gas air preheater 7 exchanges heat, until smoke temperature 180
DEG C or so；Flue gas exchanges heat with the low-level (stack-gas) economizer 3 from low pressure feed water later, and exhaust gas temperature is dropped to 130 DEG C or so, is added
The high-pressure heater that water supply after heat is guided in steam turbine system further heats, and medium-pressure boiler in this way can then be directly entered high temperature province
Coal device.On the other hand, normal temperature air is sent into the steam-type air preheater 8 being arranged in outside stove, is added by the steam from steam turbine
Heat, air themperature enter back into the First air low-temperature flue gas air preheater 6 and Secondary Air low temperature cigarette in back-end ductwork 1 to 100 DEG C or so
Gas air preheater 7.
In back-end ductwork, conventional heating surface arrangement is economizer and smoke air preheater single-stage or multistage by certain suitable
Sequence is arranged, and the present invention by air preheater because in view of flue gas is to low temperature air preheater etching problem, being divided into two kinds of forms, i.e. low temperature
Duan Caiyong steam heats the form of air, and steam derives from steam turbine steam extraction, because air capacity is not big, and the hot wind required heat to
Temperature（100 DEG C or so）Also relatively low, therefore air consumption is seldom, is not much affected to steam turbine system.Heated air according to
The primary and secondary air of setting matches, and is respectively fed to First air low-temperature flue gas air preheater 6 and Secondary Air low-temperature flue gas in back-end ductwork 1
Air preheater 7 when needing higher hot blast temperature, then passes through height again by flue gas to certain temperature to improve efficiency of combustion
The flue gas air preheater heating of temperature section reaches set temperature value.The air themperature of back-end ductwork 1 is sent at 100 DEG C or so, flue gas
Outlet temperature so avoids the temperature region of easy dust stratification and corrosion completely at 180 DEG C or so；On the other hand, using flue gas come
High temperature section air is heated, while flue-gas temperature being cooled down, because of the problems such as there is no dust stratification, corrosion and compressions, air preheater
Material is all made of common seamed steel pipe.180 DEG C or so of flue gas will be reduced to 130 DEG C hereinafter, can be used in water treatment system
It is re-fed into high-pressure heater after 104 DEG C of deaerated water, with flue gas heat exchange of the outlet of low pressure oxygen-eliminating device（For high-pressure boiler）, reducing
Exhaust gas temperature returns steam turbine system and saves heat while improving boiler thermal efficiency.
Claims (3)
1. a kind of biomass boiler back-end ductwork structure comprising back-end ductwork, sequentially cloth from top to bottom in the back-end ductwork
It is equipped with high-temperature economizer, air preheater and low-level (stack-gas) economizer, which is characterized in that the air preheater in the back-end ductwork is flue gas
Air preheater, the flue gas air preheater include high-temperature flue gas air preheater and low-temperature flue gas air preheater, the low-temperature flue gas air preheater one
Side connection is located at the steam-type air preheater outside the back-end ductwork, and the low-temperature flue gas air preheater other side is connected to by outside
Cover is connected to high-temperature flue gas air preheater one end, and the high-temperature flue gas air preheater other end is connected to burner hearth, and the steam-type is empty pre-
Device heats the air being passed through.
2. a kind of biomass boiler back-end ductwork structure according to claim 1, which is characterized in that the high-temperature flue gas is empty
Pre- device includes First air high-temperature flue gas air preheater and Secondary Air high-temperature flue gas air preheater, and the low-temperature flue gas air preheater includes corresponding to
First air low-temperature flue gas air preheater and Secondary Air low-temperature flue gas air preheater, the external connection cover includes being connected to the First air
Low-temperature flue gas air preheater and the First air circuit of the First air high-temperature flue gas air preheater, to be connected to the Secondary Air low-temperature flue gas empty
The Secondary Air circuit of pre- device and the Secondary Air high-temperature flue gas air preheater.
3. a kind of biomass boiler back-end ductwork structure according to claim 1, which is characterized in that the high-temperature economizer
Include two arranged up and down with the low-level (stack-gas) economizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810504555.8A CN108534161A (en) | 2018-05-24 | 2018-05-24 | A kind of biomass boiler back-end ductwork structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810504555.8A CN108534161A (en) | 2018-05-24 | 2018-05-24 | A kind of biomass boiler back-end ductwork structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108534161A true CN108534161A (en) | 2018-09-14 |
Family
ID=63472632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810504555.8A Pending CN108534161A (en) | 2018-05-24 | 2018-05-24 | A kind of biomass boiler back-end ductwork structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108534161A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4205630A (en) * | 1978-11-15 | 1980-06-03 | Combustion Engineering, Inc. | Steam air preheater for maintaining the flue gas temperature entering dust collection equipment |
| CN1632376A (en) * | 2004-12-30 | 2005-06-29 | 哈尔滨工业大学 | Method of processing refuse burning fly ash through cyclone furnace high temperature melting |
| CN202216274U (en) * | 2011-08-29 | 2012-05-09 | 上海新业锅炉高科技有限公司 | Air pre-heater with separate air intake at high and low wind pressure |
| CN104501177A (en) * | 2014-12-24 | 2015-04-08 | 山西蓝天环保设备有限公司 | Waste incinerating circulating fluidized bed boiler |
| CN204554755U (en) * | 2015-04-10 | 2015-08-12 | 中国科学院工程热物理研究所 | Waste heat boiler and the vertical industrial coal powder boiler with it |
| CN106765015A (en) * | 2016-12-22 | 2017-05-31 | 江联重工集团股份有限公司 | One kind prevents the biomass fluid bed boiler of low-temperature corrosion of air preheater and system |
| CN208253623U (en) * | 2018-05-24 | 2018-12-18 | 无锡华光锅炉股份有限公司 | Biomass boiler back-end ductwork structure |
-
2018
- 2018-05-24 CN CN201810504555.8A patent/CN108534161A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4205630A (en) * | 1978-11-15 | 1980-06-03 | Combustion Engineering, Inc. | Steam air preheater for maintaining the flue gas temperature entering dust collection equipment |
| CN1632376A (en) * | 2004-12-30 | 2005-06-29 | 哈尔滨工业大学 | Method of processing refuse burning fly ash through cyclone furnace high temperature melting |
| CN202216274U (en) * | 2011-08-29 | 2012-05-09 | 上海新业锅炉高科技有限公司 | Air pre-heater with separate air intake at high and low wind pressure |
| CN104501177A (en) * | 2014-12-24 | 2015-04-08 | 山西蓝天环保设备有限公司 | Waste incinerating circulating fluidized bed boiler |
| CN204554755U (en) * | 2015-04-10 | 2015-08-12 | 中国科学院工程热物理研究所 | Waste heat boiler and the vertical industrial coal powder boiler with it |
| CN106765015A (en) * | 2016-12-22 | 2017-05-31 | 江联重工集团股份有限公司 | One kind prevents the biomass fluid bed boiler of low-temperature corrosion of air preheater and system |
| CN208253623U (en) * | 2018-05-24 | 2018-12-18 | 无锡华光锅炉股份有限公司 | Biomass boiler back-end ductwork structure |
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