CN106482093A - Face-fired boiler and the flue gas recirculation combustion system with the boiler - Google Patents
Face-fired boiler and the flue gas recirculation combustion system with the boiler Download PDFInfo
- Publication number
- CN106482093A CN106482093A CN201611084307.XA CN201611084307A CN106482093A CN 106482093 A CN106482093 A CN 106482093A CN 201611084307 A CN201611084307 A CN 201611084307A CN 106482093 A CN106482093 A CN 106482093A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- boiler
- face
- wall
- burner hearth
- 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.)
- Granted
Links
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
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
-
- 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
- F23C2201/00—Staged combustion
- F23C2201/10—Furnace staging
- F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
-
- 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
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/09002—Specific devices inducing or forcing flue gas recirculation
Abstract
The present invention relates to field of boilers, discloses a kind of face-fired boiler, the boiler includes burner hearth（1）, burner hearth（1）By front-back wall（2、3）With two side walls（4、5）Surround, described front-back wall（2、3）It is provided with burner nozzle（6）, described burner hearth（1）Include primary zone, reducing zone and burning-out zone, burner hearth from low to high（1）Bottom there is furnace hopper（7）, described furnace hopper（7）It is provided with smoke inlet（8）, the smoke inlet（8）For introducing the side wall（4、5）The flue gas that inwall is flowed up.The flue gas that the present invention passes through to be flowed in the introducing of side wall inwall from bottom to top forms protective layer; improve the atmosphere in opposed firing boiler side wall region; this is beyond one's reach by other existing adherent wind means; which has effectively completely cut off contact of the strong reducing property atmosphere with water-cooling wall, so as to can pre- side-proof wall high temperature corrosion.
Description
Technical field
The present invention relates to boiler technology field, the face-fired boiler of more particularly to pre- side-proof wall high temperature corrosion and utilization
The flue gas recirculation combustion system of the face-fired boiler.
Background technology
Opposite Firing Boiler is also brought while NOx is reduced with the application of air staged combustion technology
A lot of negative effects, wherein high temperature corrosion is one of them.As the flue gas mixing along furnace chamber width is weaker, near side
Wind difficulty is mended on wall surface, in the middle part of side wall（Along furnace depth direction）The scarce wind in position is particularly evident, causes front-back wall
Oxygen amount of the face-fired boiler in the flue gas of side wall surface is very low, and carbon monoxide content is very high, and high-temperature flue gas are in strong reducing property
Atmosphere, along with the parameter more and more higher of current boiler, furnace water cooling wall temperature also more and more higher, side water wall is easy to be occurred
High temperature corrosion, high temperature corrosion cause water-cooling wall trommel, bring very big harm to the safety and economic operation of boiler.Therefore,
Water screen tube high temperature corrosion how is prevented to become the problem that boiler producer and power plant pay close attention to jointly.
Content of the invention
The technical problem to be solved is the face-fired boiler for providing a kind of pre- side-proof wall high temperature corrosion of energy, with
The atmosphere of side wall is significantly improved, prevents water wall high temperature corrosion.
The technical solution adopted for the present invention to solve the technical problems is：Face-fired boiler, the boiler include burner hearth,
Burner hearth is surrounded by front-back wall and two side walls, and described front-back wall is provided with burner nozzle, and described burner hearth includes from low to high
Primary zone, reducing zone and burning-out zone, the bottom of burner hearth have furnace hopper, and described furnace hopper is provided with smoke inlet, the flue gas
Entrance is for introducing the flue gas that the side wall inwall is flowed up.
The beneficial effect of technique scheme is：Protection is formed by introducing, in side wall inwall, the flue gas for flowing from bottom to top
Layer, improves the atmosphere in opposed firing boiler side wall region, and this is beyond one's reach by other existing adherent wind means, and which is effective
Ground completely cut off contact of the strong reducing property atmosphere with water-cooling wall, so as to can pre- side-proof wall high temperature corrosion.
Further, described smoke inlet is two, is correspondingly arranged at the bottom of furnace hopper below two side walls respectively.
Further, in the inside of furnace hopper, the smoke inlet is provided with the grey knuckle of gear away from the side of side wall.The gear ash
Knuckle can prevent the lime-ash that coal dust firing is formed from falling into smoke inlet and result in blockage.
Further, the region near two side walls on the front wall and/or rear wall of reducing zone is disposed with flue gas spout.Institute
" close " that states, refers to by adjusting flue gas nozzle exit area and side wall distance on front wall and/or rear wall so as to functionally can edge
The inwall of the side wall laterally sprays into flue gas.As reducing zone lacks, wind is particularly evident, and carbon monoxide content is very high, reducing atmosphere
Most strong, the flue gas spout injects the supplement of measure as bottom flue gas, and the flue gas of furnace hopper bottom injection can be coordinated to prevent further
The only high temperature corrosion of reducing zone water-cooling wall.
Further, described front wall and Hou Qiang are provided with the flue gas spout, the flue gas flow rate that flue gas spout sprays
More than or equal to 50m/s, to ensure that the flue gas that front-back wall is sprayed into has enough momentum to reach in the middle of side wall.
Further, described flue gas spout is circular or rectangle.
Present invention also offers a kind of flue gas recirculation combustion system, including set gradually boiler, deduster, air-introduced machine
And chimney, described boiler is the face-fired boiler described in technique scheme, and its furnace hopper bottom is provided with described cigarette
Gas entrance, described recycle burning system also include flue gas recycled blower fan, and which is arranged in dedusting along flue gas recycled flow direction
Flue gas recycled is introduced described smoke inlet after device.
Present invention also offers a kind of flue gas recirculation combustion system, including set gradually boiler, deduster, air-introduced machine
And chimney, described boiler is the face-fired boiler described in technique scheme, and its furnace hopper bottom is provided with described cigarette
Gas entrance, front wall and/or rear wall are provided with described flue gas spout, and described recycle burning system also includes flue gas recycled
Blower fan, its are flowed to along flue gas recycled after being arranged in deduster and for flue gas recycled to introduce described smoke inlet and flue gas spray
Mouthful.
In such scheme, after flue gas recycled is quoted from deduster, it is ensured that flue gas is pure, can prevent pipeline abrasion and
Blocking.
The beneficial effect of above-mentioned flue gas recirculation combustion system is：Prevent height with the conventional Secondary Air that introduces as adherent wind
The measure of temperature corrosion is compared, and is had the advantage that：1）No matter conventional adherent wind is introduced from the Secondary Air in primary zone or burnout degree,
Burner hearth central region air quantity will be caused to reduce, cause to shield bottom O2Skewness, forms burner hearth central region reproducibility gas
Oxidizing atmosphere near atmosphere, side wall, so as to cause to shield the harm such as slagging scorification, and is injected flue gas recycled and will not be robbed with burner
Wind, so as to avoid this phenomenon；2）Equally, by injecting flue gas from furnace hopper bottom, can be formed from bottom to top uniformly in side wall
Flue gas protective layer, this is beyond one's reach by other adherent wind means；3）Similarly, since between primary zone and burning-out zone
Reducing zone reducing atmosphere most strong, therefore supplement as a kind of, arrange institute in the front-back wall in this region near side wall region
The flue gas spout that states, to make up the possibility of the flue gas in this region protection layer less effective of bottom injection.
Description of the drawings
Fig. 1 is the schematic diagram of the face-fired boiler of the present invention；
Fig. 2 is the schematic diagram of the flue gas recirculation combustion system of the present invention；
Fig. 3 is the comparison diagram by present invention arrangement smoke inlet and flue gas spout rear hearth water-cooling wall strong reducing property atmosphere zones
（Left figure is postponed for cloth, before right figure is for arrangement）；
In figure is labeled as：1- burner hearth, 2- front wall, wall after 3-, wall on the left of 4-, 5- right-side wall, 6- burner nozzle, 7- furnace hopper,
8- smoke inlet, the grey knuckle of 9- gear, 10- flue gas spout, 11- deduster, 12- air-introduced machine, 13- chimney, 14- fire air nozzle,
15- flue gas recycled blower fan.
Specific embodiment
The present invention is described in further detail with reference to specific embodiment, but embodiments of the present invention are not limited to
This.
As depicted in figs. 1 and 2, the face-fired boiler of the present invention, the boiler include burner hearth 1, burner hearth 1 by front wall 2, after
Wall 3, left side wall 4 and right-side wall 5 are surrounded.Described burner hearth 1 includes primary zone, reducing zone and burning-out zone from low to high.Described
Front wall 2 and rear wall 3 are equipped with burner nozzle 6（Positioned at primary zone）And fire air nozzle 14（Positioned at burning-out zone）.The burner hearth 1
Bottom there is furnace hopper 7,7 bottom of furnace hopper is provided with two smoke inlets 8, be correspondingly arranged at respectively left side wall 4, right-side wall
The bottom of 5 lower section furnace hoppers 7, two smoke inlets 8 are respectively used to introducing and press close to the left side wall 4 and 5 inwall of right-side wall upwards
The flue gas of flowing.In addition, in order to the lime-ash for preventing coal dust firing from being formed falls into the smoke inlet 8, deviating from side in each smoke inlet 8
The side of wall is additionally provided with the grey knuckle 9 of gear.
As the reducing atmosphere of reducing zone is most strong, the water screen tube high temperature therefore in order to prevent region here further is rotten
Erosion, is respectively disposed with a flue gas spout 10 near the region of two side walls on the front wall 2 and rear wall 3 of reducing zone, i.e., and altogether four
Individual flue gas spout 10, the flue gas flow rate that each flue gas spout 10 sprays need to be more than or equal to 50m/s, enough to ensure that flue gas has
To reach in the middle of side wall, the flue gas spout 10 can be circular or rectangle to momentum.
As shown in Fig. 2 the face-fired boiler of the present invention is applied to flue gas recirculation combustion system.The recycle burning
System includes the face-fired boiler for setting gradually（That is present embodiment face-fired boiler described above）, deduster 11,
Air-introduced machine 12 and chimney 13, the smoke inlet 8 of the face-fired boiler and the flue gas of flue gas spout 10 all by pipeline quoted from
Flue gas recycled after the recycle burning system air-introduced machine 12, and flue gas recycled blower fan 15 is provided with the pipeline,
To ensure flue gas recycled amount.
As shown in figure 3, smoke inlet 8 and flue gas spout 10 rear hearth water of the left figure for the face-fired boiler arrangement present invention
The strong reducing property atmosphere zones distribution map of cold wall, before right figure is for arrangement.It can be seen that the present invention is by introducing from lower in side wall inwall
The flue gas of upper flowing forms protective layer, has completely cut off contact of the strong reducing property atmosphere with water-cooling wall, has effectively prevented the height of side wall
Temperature corrosion.
Claims (8)
1. face-fired boiler, the boiler include burner hearth（1）, burner hearth（1）By front-back wall（2、3）With two side walls（4、5）Enclose
Become, described front-back wall（2、3）It is provided with burner nozzle（6）, described burner hearth（1）Include primary zone, reducing zone from low to high
And burning-out zone, burner hearth（1）Bottom there is furnace hopper（7）, it is characterised in that：Described furnace hopper（7）It is provided with smoke inlet
（8）, the smoke inlet（8）For introducing the side wall（4、5）The flue gas that inwall is flowed up.
2. face-fired boiler according to claim 1, it is characterised in that：Described smoke inlet（8）For two, respectively
It is correspondingly arranged at two side walls（4、5）Lower section furnace hopper（7）Bottom.
3. face-fired boiler according to claim 2, it is characterised in that：In furnace hopper（7）Inside, the flue gas enters
Mouthful（8）Away from side wall（4、5）Side be provided with the grey knuckle of gear（9）.
4. the face-fired boiler according to any one in claim 1-3, it is characterised in that：Front wall in reducing zone
（2）And/or rear wall（3）Upper close two side walls（4、5）Region be disposed with flue gas spout（10）.
5. face-fired boiler according to claim 4, it is characterised in that：Described front wall（2）With rear wall（3）It is respectively provided with
There is the flue gas spout（10）, flue gas spout（10）The flue gas flow rate of ejection is more than or equal to 50m/s.
6. face-fired boiler according to claim 4, it is characterised in that：Described flue gas spout（10）For circular or square
Shape.
7. flue gas recirculation combustion system, including set gradually boiler, deduster（11）, air-introduced machine（12）And chimney（13）,
It is characterized in that：Described boiler is the face-fired boiler in claim 1-3 described in any one, and described recycling is fired
Burning system also includes flue gas recycled blower fan（15）, which is arranged in deduster along flue gas recycled flow direction（11）To recycle afterwards
Flue gas introduces described smoke inlet（8）.
8. flue gas recirculation combustion system, including set gradually boiler, deduster（11）, air-introduced machine（12）And chimney（13）,
It is characterized in that：Described boiler is the face-fired boiler in claim 4-6 described in any one, and described recycling is fired
Burning system also includes flue gas recycled blower fan（15）, which is arranged in deduster along flue gas recycled flow direction（11）To recycle afterwards
Flue gas introduces described smoke inlet（8）With flue gas spout（10）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611084307.XA CN106482093B (en) | 2016-11-30 | 2016-11-30 | Opposed firing boiler and flue gas recirculation combustion system using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611084307.XA CN106482093B (en) | 2016-11-30 | 2016-11-30 | Opposed firing boiler and flue gas recirculation combustion system using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106482093A true CN106482093A (en) | 2017-03-08 |
| CN106482093B CN106482093B (en) | 2020-02-11 |
Family
ID=58274928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611084307.XA Active CN106482093B (en) | 2016-11-30 | 2016-11-30 | Opposed firing boiler and flue gas recirculation combustion system using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106482093B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715668A (en) * | 2017-10-30 | 2018-02-23 | 东方电气集团东方锅炉股份有限公司 | A kind of flue gas high concentrate NOx realizes the device of minimum discharge |
| CN110454775A (en) * | 2019-07-31 | 2019-11-15 | 华电电力科学研究院有限公司 | A kind of flue gas anticorrosion and coking wind system |
| CN111156538A (en) * | 2020-02-28 | 2020-05-15 | 江华 | Method for transforming coal-fired boiler into biomass fuel boiler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004077116A (en) * | 2002-06-28 | 2004-03-11 | Praxair Technol Inc | Combustion method for heat consumption device using oxygen-fuel combustion |
| CN2676041Y (en) * | 2003-12-25 | 2005-02-02 | 乐长义 | Hypothermal gas recirculation equipment for boiler of large capacity power station |
| CN101021316A (en) * | 2007-03-14 | 2007-08-22 | 哈尔滨工业大学 | Method and device of denitration utilizing biomass direct burning and re-burning as well as smoke gas recirculating technology |
| CN102252324A (en) * | 2011-05-16 | 2011-11-23 | 徐州燃控科技股份有限公司 | Method for combusting fuel reburning low-nitrogen oxide |
| CN204786359U (en) * | 2015-06-29 | 2015-11-18 | 王春昌 | Coal fired boiler's dual cycle flue gas system |
| CN206222298U (en) * | 2016-11-30 | 2017-06-06 | 东方电气集团东方锅炉股份有限公司 | Face-fired boiler and the flue gas recirculation combustion system with the boiler |
-
2016
- 2016-11-30 CN CN201611084307.XA patent/CN106482093B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004077116A (en) * | 2002-06-28 | 2004-03-11 | Praxair Technol Inc | Combustion method for heat consumption device using oxygen-fuel combustion |
| CN2676041Y (en) * | 2003-12-25 | 2005-02-02 | 乐长义 | Hypothermal gas recirculation equipment for boiler of large capacity power station |
| CN101021316A (en) * | 2007-03-14 | 2007-08-22 | 哈尔滨工业大学 | Method and device of denitration utilizing biomass direct burning and re-burning as well as smoke gas recirculating technology |
| CN102252324A (en) * | 2011-05-16 | 2011-11-23 | 徐州燃控科技股份有限公司 | Method for combusting fuel reburning low-nitrogen oxide |
| CN204786359U (en) * | 2015-06-29 | 2015-11-18 | 王春昌 | Coal fired boiler's dual cycle flue gas system |
| CN206222298U (en) * | 2016-11-30 | 2017-06-06 | 东方电气集团东方锅炉股份有限公司 | Face-fired boiler and the flue gas recirculation combustion system with the boiler |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107715668A (en) * | 2017-10-30 | 2018-02-23 | 东方电气集团东方锅炉股份有限公司 | A kind of flue gas high concentrate NOx realizes the device of minimum discharge |
| CN110454775A (en) * | 2019-07-31 | 2019-11-15 | 华电电力科学研究院有限公司 | A kind of flue gas anticorrosion and coking wind system |
| CN111156538A (en) * | 2020-02-28 | 2020-05-15 | 江华 | Method for transforming coal-fired boiler into biomass fuel boiler |
| CN111156538B (en) * | 2020-02-28 | 2023-04-14 | 江华 | Method for transforming coal-fired boiler into biomass fuel boiler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106482093B (en) | 2020-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104633652B (en) | Burning system of opposite firing boiler | |
| CN103438437B (en) | A kind of adherent wind system of Opposite Firing Boiler | |
| JPS5942202B2 (en) | Pulverized coal combustion furnace | |
| US9790570B2 (en) | Apparatus and method for the thermal treatment of lump or agglomerated material | |
| CN106482093A (en) | Face-fired boiler and the flue gas recirculation combustion system with the boiler | |
| CN203454111U (en) | Novel near-wall air device for front and rear wall opposed firing boiler | |
| CN106989411A (en) | A kind of boiler water wall air film protection device | |
| CN102679390B (en) | Compound furnace arch and compound secondary air structure for cooperatively controlling generation of nitrogen oxide (NOX) | |
| CN204358709U (en) | A kind of combustion system of Opposite Firing Boiler | |
| CN107606605B (en) | A kind of W flame boiler using flue gas recycled | |
| CN206222298U (en) | Face-fired boiler and the flue gas recirculation combustion system with the boiler | |
| CN205102117U (en) | Combination adherence wind system of front and back wall opposed firing boiler all | |
| CN103090406B (en) | Biomass boiler | |
| CN104296129B (en) | A kind of W type flame boiler of symmetrical combustion | |
| CN206861508U (en) | A kind of boiler and its side water wall high temperature corrosion resistance coking device | |
| CN204786354U (en) | Combustion system of wall opposed firing boiler security and economic nature around improving | |
| CN206973529U (en) | The low steady combusting boiler of nitrogen of one kind combustion polygonal circle of contact of low-volatite coal | |
| CN202328328U (en) | Biomass boiler | |
| CN209801462U (en) | Chain furnace with flue gas recirculation | |
| CN206739279U (en) | A kind of more gradient burners of the high effect cleaning of coal | |
| CN100491825C (en) | Slagging-resistance and high temperature corrosion resistance coal powder burning device used in vertical strong/weak combustion boiler | |
| CN101943400B (en) | W flame boiler for avoiding clinkering on water-cooled walls of wing walls and sidewalls by four-corner ventilation | |
| CN207035095U (en) | A kind of easy coking area of main burner solves coking structure | |
| CN206918995U (en) | A kind of polygonal tangential firing device of fire retardant coal | |
| CN206861510U (en) | Vertical pulverized-coal fired boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |