CN206846694U - A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission - Google Patents
A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission Download PDFInfo
- Publication number
- CN206846694U CN206846694U CN201720552424.8U CN201720552424U CN206846694U CN 206846694 U CN206846694 U CN 206846694U CN 201720552424 U CN201720552424 U CN 201720552424U CN 206846694 U CN206846694 U CN 206846694U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- boiler
- pipeline
- mixed
- circulating 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
Abstract
The utility model discloses a kind of mixed by flue gas recirculation to burn the device for reducing biomass bagasse boiler NOx emission, including boiler body, gas cleaning plant, deduster, air-introduced machine, chimney and circulating flue gas pipeline；Boiler body includes boiler furnace, furnace and Boiler Furnace bottom air compartment successively from top to bottom；Top, gas cleaning plant, deduster, air-introduced machine and the chimney of boiler furnace are sequentially communicated by pipeline；The outlet of circulating flue gas pipeline one end and air-introduced machine, the other end lead to Boiler Furnace bottom air compartment.The utility model is mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission, simple in construction, easy to use, by the way that the flue gas recirculation of emptying is utilized, not only increases the burning degree of biomass bagasse, and make NO in flue gasxSignificant reduction has been obtained, ultra-clean discharge can be achieved.
Description
Technical field
It the utility model is related to a kind of mixed by flue gas recirculation and burn the device for reducing biomass bagasse boiler NOx emission, category
In biomass combustion field.
Background technology
China is energy resource consumption big country, due to largely having triggered energy shortage and environmental degradation to ask using fossil fuel
Topic, with the development of society, biomass energy occupies consequence in boiler oil.
Biomass is a kind of renewable resource, and yield is big, can realize CO2" low emission ", meet low-carbon economy will
Ask.NOx emission concentration of the biomass after boiler combustion in flue gas is typically in 250~350mg/Nm3.With Environmental Protection in China form
Sternness, most of biomass boilers are performed according to boiler thermal power plant environmental requirement, to be realized by traditional denitrating technique
＜ 100mg/Nm3 even the ＜ 50mg/Nm of the ultra-clean discharge in key area3Requirement have certain difficulty.
Utility model content
In order to solve NO in biomass boiler flue gas in the prior artxThe defects of discharge is not up to standard, the utility model provide
A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission.
In order to solve the above technical problems, technical scheme is as follows used by the utility model：
A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission, including boiler body, gas
Purifier, deduster, air-introduced machine, chimney and circulating flue gas pipeline；Boiler body includes boiler furnace, pot successively from top to bottom
Furnace bed and Boiler Furnace bottom air compartment；Top, gas cleaning plant, deduster, air-introduced machine and the chimney of boiler furnace pass through pipeline
It is sequentially communicated；The outlet of circulating flue gas pipeline one end and air-introduced machine, the other end lead to Boiler Furnace bottom air compartment.
In use, biomass bagasse is in Boiler Furnace chamber inner combustion, after caused flue gas comes out from the top of boiler furnace,
Enter in the presence of air-introduced machine and be introduced into the purified treatments such as gas cleaning plant progress desulphurization denitration, then deduster dedusting
Afterwards, a part is vented by chimney, and a part is recycled to Boiler Furnace bottom air compartment and recycled, and so not only increases biomass
Burning degree, and significantly reduce NOx discharge.
The direction that circulating flue gas enters furnace bottom air compartment is preferably vertical with First air wind direction.
The application gas cleaning plant includes external desulfurzation processing etc., SNCR denitration, external desulfurzation etc. in stove, with reference to existing
Technology.
The application exports extension flue gas recirculation to Boiler Furnace bottom air compartment in boiler tail air-introduced machine, so as to change boiler
Burning crosses oxygen quotient and promotes biomass fuel fully to burn, so as to reduce emission of NOx of boiler value.
The above-mentioned flue gas drawn from air-introduced machine outlet carries certain malleation, and passes through the place of deduster before going out air-introduced machine
Reason, is clean flue gas.
The wind mixing of flue gas and original furnace bottom air compartment intake stack that the application is drawn from air-introduced machine outlet enters pot jointly
Stove furnace bottom air compartment participates in burning.
The relative position when noun of locality such as the application top, bottom, upper and lower is device normal operating condition.
Applicant it has been investigated that, biomass boiler NOx emission value there are about 90% come from boiler biomass fuel combustion
The fuel type NOx of burning, and fuel type NOx 80% or so is produced and is separated out the coking of fixed carbon in fuel combustion fugitive constituent at initial stage
In combustion process, and if controlling its aflame redox atmosphere to change fuel type NOx lifes in fuel type NOx generations
Into value, mainly the N compounds burning when oxidation atmosphere is strong in fuel is most of changes to NOx, is fired when oxidation atmosphere is weak
N compounds burning in material is most of to N2Transformation, so change burning initial stage crossing oxygen quotient and can effectively control fuel
Type NOx generation values, the application are close by the way that boiler tail is participated in into furnace burning by appropriate flue gas recirculation to furnace bottom air compartment
Phase region burns, and while boiler normal combustion is ensured, change boiler initiation combustion crosses oxygen quotient, so as to reduce fuel type
The method of NOx discharge, then coordinate SNCR denitration technology to realize ultra-clean discharge.
Meanwhile applicant further found that, biomass fixes siege boiler because the equipment loss of longtime running and later stage increase newly
Environmental protection equipment cause boiler tail resistance increase, original boiler wind speed adjustment system just show slightly deficiency, be embodied in hearth furnace bottom wind
Room airflow pressure is relatively low not to have overdose space with air-introduced machine aperture after stove, so as to cause the fluidized state of biomass material bad,
So that to accumulate burning on siege insufficient for biomass fuel, so as to cause the easy coking in siege position to influence production, and this Shen
Please by boiler tail circulating flue gas, so that the peroxide factor alpha of boiler combustion is controlled, emission of NOx of boiler value is reduced.
The application improves furnace burning using boiler tail flue gas circulating combustion, while reduces burning and produce initial stage
NOx concentration method.Fundamentally reduce NOx discharge.
The NM technique of the application includes SNCR denitration technology etc. with reference to prior art.
In order to further improve denitration efficiency, mixing burning above by flue gas recirculation reduces biomass bagasse boiler NOx emission
Device, in addition to circulating flue gas inlet guiding, circulating flue gas pipeline lead to one end of Boiler Furnace bottom air compartment by circulating cigarette
Gas inlet guiding connects with Boiler Furnace bottom air compartment.
Deflector is provided with circulating flue gas inlet guiding, deflector is located at circulating flue gas pipeline and led with circulating flue gas import
To the surface of device connectivity part.
Relative position when the inferior noun of locality is device normal operating condition in the application.Namely enter from circulating flue gas pipeline
The flue gas for entering circulating flue gas inlet guiding enters Boiler Furnace bottom air compartment after deflector reflects, notable to improve circulation cigarette
The utilization rate of gas.
In order to further improve flue gas utilization efficiency, deflector is with the flue gas flow direction in circulating flue gas pipeline in 40-50 ° of folder
Angle.
In order to extend the service life of circulating flue gas pipeline, circulating flue gas pipeline is provided with expansion joint for pipeline.Can so have
Imitate compensation temperature difference and additional stress caused by mechanical oscillation.Expansion joint for pipeline is preferably located at close to one end of furnace bottom air compartment.
Enter the amount of furnace bottom air compartment in order to facilitate control circulating flue gas, circulating flue gas inlet guiding and expansion joint for pipeline it
Between circulating flue gas pipeline be provided with pipeline valve.The size of air circulation can be so adjusted as required by.
In order to further improve the adequacy of the fluidity and material of material burning, circulating flue gas inlet guiding and pipeline
Circulating flue gas pipeline between valve is provided with pressurized frequency change blower fan.The blast of circulating flue gas, which can so be improved, improves furnace bottom air compartment
The oxygen amount of Stress control furnace bottom burning wind, improve the burning of biomass boiler siege so as to realize, reduce biomass boiler burning and produce
Raw NOx discharge.
In order to save space, reduce energy consumption, Boiler Furnace bottom air compartment is up big and down small conical structure.Namely the big end of air compartment
In upper small end under, boiler furnace connects with the big end of Boiler Furnace bottom air compartment.
The scope words such as the application is upper and lower, bottom dome, refer both to the relative position under device normal operating condition.
The NM technology of the utility model is with reference to prior art.
The utility model is mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission, simple in construction, makes
With conveniently, by the way that the flue gas recirculation of emptying is utilized, the burning degree of biomass bagasse is not only increased, and make in flue gas
NOxSignificant reduction has been obtained, ultra-clean discharge can be achieved.
Brief description of the drawings
Fig. 1 is that the utility model mixes the device for burning reduction biomass bagasse boiler NOx emission by flue gas recirculation；
In figure, 1 it is boiler body, 2 is boiler furnace, 3 is furnace, 4 is Boiler Furnace bottom air compartment, 5 is gas purification
Device, 6 be deduster, 7 be air-introduced machine, 8 be chimney, 9 be circulating flue gas inlet guiding, 10 be circulating flue gas pipeline, 11 be
Expansion joint for pipeline, 12 be pipeline valve, 13 be pressurized frequency change blower fan, 14 be that to take gas interface, 15 be that circulating flue gas enters to circulating flue gas
Gas interface, 16 are deflector.
Embodiment
In order to more fully understand the utility model, content of the present utility model is furtherd elucidate with reference to embodiment, but
Content of the present utility model is not limited solely to the following examples.
Embodiment 1
Mixed as shown in Figure 1 by flue gas recirculation and burn the device for reducing biomass bagasse boiler NOx emission, including boiler sheet
Body, gas cleaning plant (desulphurization denitration), deduster, air-introduced machine, chimney, circulating flue gas inlet guiding and circulating flue gas pipe
Road；The Boiler Furnace that boiler body includes boiler furnace, is located at the furnace of boiler furnace bottom and is located at furnace bottom
Bottom air compartment；Top, gas cleaning plant, deduster, air-introduced machine and the chimney of boiler furnace are sequentially communicated by pipeline；Circulate cigarette
Feed channel one end is connected with outlet, the other end of air-introduced machine by circulating flue gas inlet guiding with Boiler Furnace bottom air compartment；
Deflector is provided with circulating flue gas inlet guiding, deflector is located at circulating flue gas pipeline and connected with circulating flue gas inlet guiding
The surface at place, deflector are in 45 ° of angles with the flue gas flow direction in circulating flue gas pipeline；It is swollen that circulating flue gas pipeline is provided with pipeline
Swollen section, the circulating flue gas pipeline between circulating flue gas inlet guiding and expansion joint for pipeline are provided with pipeline valve, circulating flue gas
Circulating flue gas pipeline between inlet guiding and pipeline valve is provided with pressurized frequency change blower fan；Boiler Furnace bottom air compartment for it is upper it is big under
Small conical structure.
Comparative example 1
Biomass bagasse boiler device includes boiler body connected in order, gas cleaning plant (desulphurization denitration), dedusting
Device, air-introduced machine and chimney.
Application Example
Guangxi Fu Nan bioenergies Co., Ltd, 170t/h bagasse stoves, uses the scheme in comparative example 1, NOxDischarge it is dense
Spend for 313.5mg/Nm3；Scheme in Application Example 1 afterwards, and circulating flue gas pipeline is additionally arranged on the basis of comparative example 1
Deng NOxConcentration of emission be ＜ 50mg/Nm3；Embodiment 1 is identical with the aperture of air-introduced machine in comparative example 1；
The device for reducing biomass bagasse boiler NOx emission is burnt it will thus be seen that being mixed in embodiment 1 by flue gas recirculation,
It is simple in construction, it is easy to use, by the way that the flue gas recirculation of emptying is utilized, the burning degree of biomass bagasse is not only increased, and
And make NO in flue gasxSignificant reduction, the NOx ＜ 50mg/Nm of realization are obtained3Ultra-clean discharge.
Claims (8)
1. a kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission, it is characterised in that：Including boiler
Body, gas cleaning plant, deduster, air-introduced machine, chimney and circulating flue gas pipeline；Boiler body includes pot successively from top to bottom
Stove burner hearth, furnace and Boiler Furnace bottom air compartment；Top, gas cleaning plant, deduster, air-introduced machine and the chimney of boiler furnace
It is sequentially communicated by pipeline；The outlet of circulating flue gas pipeline one end and air-introduced machine, the other end lead to Boiler Furnace bottom air compartment.
2. mixed by flue gas recirculation burn the device for reducing biomass bagasse boiler NOx emission, its feature as claimed in claim 1
It is：Also include circulating flue gas inlet guiding, one end that circulating flue gas pipeline leads to Boiler Furnace bottom air compartment passes through circulating flue gas
Inlet guiding connects with Boiler Furnace bottom air compartment.
3. mixed by flue gas recirculation burn the device for reducing biomass bagasse boiler NOx emission, its feature as claimed in claim 2
It is：Deflector is provided with circulating flue gas inlet guiding, deflector is located at circulating flue gas pipeline and circulating flue gas inlet guide
The surface of device connectivity part.
4. mixed by flue gas recirculation burn the device for reducing biomass bagasse boiler NOx emission, its feature as claimed in claim 3
It is：Deflector is in 40-50 ° of angle with the flue gas flow direction in circulating flue gas pipeline.
5. being mixed by flue gas recirculation as described in claim 2-4 any one is burnt reducing biomass bagasse boiler NOx emission
Device, it is characterised in that：Circulating flue gas pipeline is provided with expansion joint for pipeline.
6. mixed by flue gas recirculation burn the device for reducing biomass bagasse boiler NOx emission, its feature as claimed in claim 5
It is：Circulating flue gas pipeline between circulating flue gas inlet guiding and expansion joint for pipeline is provided with pipeline valve.
7. mixed by flue gas recirculation burn the device for reducing biomass bagasse boiler NOx emission, its feature as claimed in claim 6
It is：Circulating flue gas pipeline between circulating flue gas inlet guiding and pipeline valve is provided with pressurized frequency change blower fan.
8. being mixed by flue gas recirculation as described in claim 1-4 any one is burnt reducing biomass bagasse boiler NOx emission
Device, it is characterised in that：Boiler Furnace bottom air compartment is up big and down small conical structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720552424.8U CN206846694U (en) | 2017-05-18 | 2017-05-18 | A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720552424.8U CN206846694U (en) | 2017-05-18 | 2017-05-18 | A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206846694U true CN206846694U (en) | 2018-01-05 |
Family
ID=60796455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720552424.8U Expired - Fee Related CN206846694U (en) | 2017-05-18 | 2017-05-18 | A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206846694U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108201784A (en) * | 2018-03-02 | 2018-06-26 | 陕西大秦环境科技有限公司 | A kind of grate-type biomass power plant boiler flue gas purification tapping equipment and its method |
| CN111412483A (en) * | 2020-04-27 | 2020-07-14 | 国电南京电力试验研究有限公司 | Medium-speed grinding powder system for grinding high-moisture lignite |
-
2017
- 2017-05-18 CN CN201720552424.8U patent/CN206846694U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108201784A (en) * | 2018-03-02 | 2018-06-26 | 陕西大秦环境科技有限公司 | A kind of grate-type biomass power plant boiler flue gas purification tapping equipment and its method |
| CN111412483A (en) * | 2020-04-27 | 2020-07-14 | 国电南京电力试验研究有限公司 | Medium-speed grinding powder system for grinding high-moisture lignite |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104132550A (en) | Energy-saving environment-friendly sintering waste gas waste-heat utilization and pollutant purification process and system | |
| CN100504162C (en) | Underarch secondary-wind downward-bias W-type flame furnace | |
| CN206846694U (en) | A kind of mixed by flue gas recirculation burns the device for reducing biomass bagasse boiler NOx emission | |
| CN107420887A (en) | The biomass direct-fired device that oxygen-enriched combusting and flue gas recirculation are combined | |
| CN204042867U (en) | A kind of low-NO_x burner system | |
| CN205807453U (en) | A kind of spreader stoker chain boiler using flue gas recirculation to reduce NOx emission | |
| CN201772440U (en) | High-efficiency burning zone burning boiler capable of controlling emission of atmospheric pollutant during burning | |
| CN102350211B (en) | Three-stage desulfurization device for circulating fluidized bed boiler | |
| CN2643182Y (en) | A partially oxygen-enriching combustion-supporting system for boiler | |
| CN202315697U (en) | Three-segment desulfurizer for boiler of circulating fluidized bed | |
| CN200949812Y (en) | Environment-protective energy-saved stream boiler | |
| CN101413674A (en) | Oxygen-enriched air mixed blowing combustion adjuvant boiler energy-saving method and employed equipment thereof | |
| CN203099790U (en) | 600 MW supercritical circulating fluid bed boiler system provided with external heat exchanger | |
| CN106838971B (en) | Biomass bundling fuel chain boiler air supply system | |
| CN115200024A (en) | Low-nitrogen oxygen-enriched efficient and clean waste incineration system and method | |
| CN102242925B (en) | Smoke and dust treatment equipment for coal-fired boiler | |
| CN111750670B (en) | Partitioned-tissue combustion self-denitration system and process with reduction furnace and decomposition furnace | |
| CN103471090B (en) | The grate firing boiler of a kind of low emission and the method for strengthened denitrification | |
| CN203560896U (en) | Low-emission coal-fired boiler | |
| CN207849356U (en) | A kind of efficient multi-chamber boiler-burner | |
| CN205939204U (en) | High -efficient low emission boiler gas recirculation device | |
| CN206055660U (en) | A kind of coal-burning boiler component for reducing smoke evacuation oxygen content | |
| CN2913870Y (en) | Underarch secondary-wind downward-bias W-type flame furnace | |
| CN220229127U (en) | Novel energy-saving spray tower hot-blast furnace | |
| CN201318857Y (en) | Energy-saving environment-friendly grain drying device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20200518 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |