CN206563287U - A kind of Novel flue gas EGR applied to biomass layer burner - Google Patents
A kind of Novel flue gas EGR applied to biomass layer burner Download PDFInfo
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- CN206563287U CN206563287U CN201620813876.2U CN201620813876U CN206563287U CN 206563287 U CN206563287 U CN 206563287U CN 201620813876 U CN201620813876 U CN 201620813876U CN 206563287 U CN206563287 U CN 206563287U
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Abstract
The utility model discloses a kind of Novel flue gas EGR applied to biomass layer burner.The device below grate furnace grate furnace fire grate be provided with flue gas recirculation air compartment, it is connected by blower fan with flue afterbody, to grate furnace fire grate on biomass fuel dryer section be blown into full flue gas.Connecting pipe is provided with flow control valve, can adjust exhaust gas volumn.It is additionally provided with First air distribution plenum to feed First air below grate furnace fire grate.The utility model provides a kind of new flue gas recirculation device, and adaptability of the biomass fired boiler to fuel is improved by changing full exhaust gas volumn, while when First air total amount is constant, increase primary zone, the primary air flow of burning-out zone promote fuel combustion complete.The utility model does simple transformation in original boiler foundation, and cost of investment is low, and application prospect is extensive.
Description
Technical field
The utility model relate to biomass-burning grate firing boiler technical field, more particularly to a kind of biomass layer that is applied to fires
The Novel flue gas EGR of stove.
Background technology
In recent years, had attracted increasing attention the problem of energy shortage.Fossil fuel（Coal, oil, natural gas etc.）Storage
Limited, skewness is measured, is always the serious puzzlement of economic development the problems such as seriously polluted.In comparison, biomass resource has
Have reserves huge, renewable, distribution is wide, the advantages of polluting small, and the utilization of biomass can more turn waste into wealth, solve environmental protection and
The conflict of economic development.The utilization technology of current biomass mainly has pyrolysis, gasification and direct combustion power generation.Biomass direct combustion power generation skill
Art is differed and non-breakable due to biomass fuel property, therefore grate furnace is widely used in biomass direct combustion power generation.
Grate furnace is asked as the Industrial Boiler being most widely used during the biomass combustion of application there is also many
Topic.Such as biomass fuel water content far beyond coal greatly, fuel dryer area head on fire grate causes combustion flame rearward, thus caused
Fire box temperature field distribution is uneven, and rear wall high temperature corrosion is serious, while fuel combustion is not exclusively, phosphorus content is higher in smoke evacuation.In addition,
Excess air coefficient is larger when biomass layer burner is burnt, and NOx output is larger, and grate furnace is generally low-altitude discharged, and air is dirty
Dye is serious.
In coal-burning boiler, mix and be blown into burner hearth with First air frequently with flue gas for reduction NOx emission, to reduce burner hearth
Interior oxygen concentration, forms reducing zone, reduces NOx generations.The problem of high biomass water content and big fluctuating range are solved in production
Conventional measure is that biomass fuel is pre-processed（Such as dry）Reduce water content；Increase primary air flow and increase raw on fire grate
Biomass fuel rate of drying；Reduce fire grate speed and extend biomass fuel in burner hearth residence time etc..But above-mentioned measure has phase
The drawbacks of answering：Carrying out pretreatment to fuel needs time and financial cost, and climate influence is serious；Increasing primary air flow will drop
Low fire box temperature, heat-economy reduction；Reduction fire grate speed also reduces biomass fuel processing speed and power plant's warp accordingly
Ji property.
Utility model content
The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art more simple there is provided a kind of equipment
Single, boiler is to biomass fuel adaptability and does not reduce the flue gas recirculation device of economy of power plant for raising.
The utility model is achieved through the following technical solutions.
A kind of Novel flue gas EGR applied to biomass layer burner, layer combustion is arranged at by flue gas recirculation air compartment
Below stove fire grate, the flue gas recirculation air compartment is connected by blower fan and pipeline with boiler exhaust gas flue afterbody, and the flue gas is again
Circulation air compartment does not access First air, with First air without mixing, is directly passed through full flue gas to burner hearth, biomass fuel is done
It is dry.
In said apparatus, the flue gas recirculation air compartment is located at below grate furnace fire grate close to the position of charging aperture, correspondence
In dryer section of the biomass fuel on grate furnace fire grate.
In said apparatus, the flue gas recirculation air compartment connecting pipe and the position that flue afterbody is connected be economizer it
Afterwards, before air preheater.
In said apparatus, flow control valve is provided with the flue gas recirculation air compartment connecting pipe, can be according to biology
The smoke that flue gas recirculation air compartment described in matter water content of fuel different adjustment is passed through.
In said apparatus, multiple First air distribution plenums are additionally provided with below grate furnace fire grate, are existed corresponding to biomass fuel
Primary zone and burning-out zone on grate furnace fire grate, First air needed for supply burning.
In said apparatus, flow control valve is provided with each described First air distribution plenum connecting pipe, to adjust one
The distribution of secondary air quantity and First air in burner hearth.
In said apparatus, tune windshield plate is provided with the flue gas recirculation air compartment and First air room, to adjust flue gas
Or First air enters the direction of burner hearth.
Said apparatus, including air preheater, economizer, secondary air chamber, grate furnace fire grate, gas recirculating fan, First air
Blower fan, fuel slag-drip opening, First air distribution plenum, flue gas recirculation air compartment, adjust windshield plate, burner hearth, biomass fuel feedstock mouthful, the
One flue, the second flue and the 3rd flue；
First flue, the second flue and the 3rd flue one S type flue of end to end formation；First flue with
Secondary air chamber is connected；The burner hearth is arranged above grate furnace fire grate, and is connected with the first flue；The secondary air chamber is arranged at
On the side wall of burner hearth；The First air distribution plenum and flue gas recirculation air compartment are arranged at below grate furnace fire grate；The First air
Distribution plenum and flue gas recirculation air compartment are arranged side by side, and the First air distribution plenum is slightly below flue gas recirculation air compartment；The cigarette
Biomass fuel feedstock mouthful is provided with above gas recycling air compartment；Air preheater is additionally provided with inside 3rd flue and coal is saved
Device；The gas recirculating fan is connected with flue gas recirculation air compartment；The First air blower fan is connected with First air distribution plenum；Institute
State the tail end that fuel slag-drip opening is arranged at First air distribution plenum；It is all provided with inside the First air distribution plenum and flue gas recirculation air compartment
It is equipped with tune windshield plate；The flue gas recirculation air compartment is connected by gas recirculating fan with the 3rd flue, and interface position is being saved
Between coal device and air preheater.
In said apparatus, in addition to total flow regulating valve, secondary air flow regulating valve, air flow control valve, a flue gas
Recirculation flow adjustable valve and First air distribution plenum flow control valve；
The total flow regulating valve is arranged between First air blower fan and air preheater；The secondary air flow regulating valve is set
Between First air blower fan and secondary air chamber；The First air blower fan and the secondary air chamber close to biomass fuel feedstock mouthful one side
Between be provided with secondary air flow regulating valve and an air flow control valve；The flue gas recirculation flow control valve is arranged at cigarette
Between gas recirculation blower and flue gas recirculation air compartment；The First air distribution plenum flow control valve be arranged at First air blower fan with
Between First air distribution plenum.
A kind of application method of Novel flue gas EGR applied to biomass layer burner, comprises the following steps：
A. gas recirculating fan volume suction back-end ductwork flue gas passes through flue feeding flue gas recirculation air compartment；
B. fed back according to rubbish water content and combustion case, adjust flow control valve, rubbish is fully dried, exhaust gas volumn is
0-0.3 times of First air；
C. flue gas flows through grate furnace fire grate by different angle directions by controllable register in flue gas recirculation air compartment and dried
Section.
Compared with prior art, advantage of the present utility model is as follows：In the utility model structure, due to the life of grate furnace fire grate
The distribution plenum of biomass fuel dryer section is flue gas recirculation air compartment, has used the temperature full flue gas high compared with First air to dry combustion
Material, on the one hand can make the biomass fuel quick dewatering drying of high-moisture, on the other hand, in the constant situation of primary air flow
Under, dryer section has used full flue gas, reduces First air and uses so that the primary air flow of grate furnace fire grate primary zone and burning-out zone
It can increase, contribute to the burning of fuel complete.Simultaneously as dryer section uses full flue gas, there is separately adjustable valve, it is easy to according to
Water content of fuel and real-time combustion case regulation exhaust gas volumn, improve the fuel tolerance of biomass boiler.And this practicality is new
Type structure is the simple transformation carried out to original grate furnace, and equipment investment cost is relatively low, and application prospect is extensive.
Brief description of the drawings
Fig. 1 is a kind of structural representation of Novel flue gas EGR applied to biomass layer burner in example.
Air preheater 1, economizer 2, total flow regulating valve 3, secondary air chamber 4, secondary air flow regulating valve 5, grate furnace fire grate
6, gas recirculating fan 7, First air blower fan 8, fuel slag-drip opening 9 a, air flow control valve 10, flue gas recirculation flow is adjusted
Valve 11 is saved, First air distribution plenum flow control valve 12, First air distribution plenum 13, flue gas recirculation air compartment 14 adjusts windshield plate 15, stove
Thorax 16, biomass fuel feedstock mouthful 17, the first flue 18, the second flue 19, the 3rd flue 20.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
See Fig. 1, a kind of Novel flue gas method for recycling and device applied to biomass layer burner, it includes grate furnace stove
Row 6, the left of grate furnace fire grate 6 is biomass fuel charging aperture 17, and the top of grate furnace fire grate 6 is to be set on burner hearth 16, burner hearth 16
There is secondary air chamber 4, the lower section of grate furnace fire grate 6 is flue gas recirculation air compartment 14 and First air distribution plenum 13（Including primary zone, after-flame
Area）.Tune windshield plate 15 is provided with the middle of secondary air chamber 4, First air distribution plenum 13 and flue gas recirculation air compartment 14.On burner hearth 16
Side is exit flue, is divided into the first flue 18, the second flue 19, the 3rd flue 20.Set on first flue 18 and the second flue 19
It is equipped with the heating surfaces such as water-cooling wall, superheater, reheater.The afterbody of 3rd flue 20 is provided with economizer 2 and air preheater 1.It is all to send
Flow control valve is provided with wind pipeline and flue.
Flue gas recirculation air compartment 14 is connected by gas recirculating fan 7 with the 3rd flue 20, and interface position is in economizer 2
Between air preheater 1.Flue gas recirculation air compartment 14 is arranged in grate furnace fire grate 6 close to the lower section of charging aperture 17, using from the 3rd
Biomass fuel is dried the full flue gas that flue is drawn.In the connecting pipe of the flue 20 of flue gas recirculation air compartment 14 and the 3rd
Flow control valve 11 is provided with, exhaust gas volumn, biomass fuel water content Gao Ze can be adjusted according to the water content of biomass fuel
Big regulating valve 11 is opened, increases flue gas flow, accelerates rate of drying, shortens dryer section of the biomass fuel on grate furnace fire grate,
Improve biomass fuel combustion situation.
First air distribution plenum 13 is connected by First air blower fan 8 with the outlet of air preheater 1 at the 3rd flue 20.First air is matched somebody with somebody
Air compartment 13 includes 3 distribution plenums, two of which supply primary zone First air, a supply burning-out zone First air.First air air distribution
Room 13 is only connected with First air pipeline, and full air is blown into from the bottom of grate furnace fire grate 6.First air distribution plenum 13 and air preheater 1
Distribution plenum flow control valve 12 is provided with connecting pipe, each distribution plenum can be adjusted according to biomass fuel combustion situation
Air quantity.Because dryer section is dried using the full flue gas biomass fuel high to water content, ensureing that primary air flow is constant
In the case of, the First air supply of primary zone and burning-out zone can be increased, promote fuel combustion complete.
General principle of the present utility model, principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be understood that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply principle of the present utility model, the utility model also has respectively on the premise of the utility model spirit and scope are not departed from
Changes and improvements are planted, these changes and improvements are both fallen within the range of claimed the utility model.The utility model requirement
Protection domain defined by appended claims and its equivalent.
Claims (8)
1. a kind of Novel flue gas EGR applied to biomass layer burner, it is characterised in that by flue gas recirculation air compartment
It is arranged at below grate furnace fire grate, the flue gas recirculation air compartment is connected by blower fan and pipeline with boiler exhaust gas flue afterbody,
The flue gas recirculation air compartment does not access First air, with First air without mixing, directly full flue gas is passed through to burner hearth, to biomass fuel
Material is dried；Multiple First air distribution plenums are additionally provided with below grate furnace fire grate, corresponding to biomass fuel in grate furnace stove
Primary zone and burning-out zone on row, First air needed for supply burning.
2. the Novel flue gas EGR of biomass layer burner is applied to according to claim 1, it is characterised in that described
Flue gas recirculation air compartment is located at close to the position of charging aperture below grate furnace fire grate, corresponding to biomass fuel in grate furnace fire grate
On dryer section.
3. the Novel flue gas EGR of biomass layer burner is applied to according to claim 1, it is characterised in that described
The position that flue gas recirculation air compartment connecting pipe is connected with flue afterbody is after economizer, before air preheater.
4. the Novel flue gas EGR of biomass layer burner is applied to according to claim 1, it is characterised in that described
Flow control valve is provided with flue gas recirculation air compartment connecting pipe.
5. the Novel flue gas EGR of biomass layer burner is applied to according to claim 1, it is characterised in that described
Flow control valve is provided with each First air distribution plenum connecting pipe.
6. the Novel flue gas EGR of biomass layer burner is applied to according to claim 1, it is characterised in that described
Tune windshield plate is provided with flue gas recirculation air compartment and First air room.
7. the Novel flue gas EGR of biomass layer burner, its feature are applied to according to claim any one of 1-6
It is, including air preheater（1）, economizer（2）, secondary air chamber（4）, grate furnace fire grate（6）, gas recirculating fan（7）, once
Wind blower fan（8）, fuel slag-drip opening（9）, First air distribution plenum（13）, flue gas recirculation air compartment（14）, adjust windshield plate（15）, burner hearth
（16）, biomass fuel feedstock mouthful（17）, the first flue（18）, the second flue（19）With the 3rd flue（20）；
First flue（18）, the second flue（19）With the 3rd flue（20）One S type flue of end to end formation；Described
One flue（18）With secondary air chamber（4）Connection；The burner hearth（16）It is arranged at grate furnace fire grate（6）Top, and with the first flue
（18）Connection；The secondary air chamber（4）It is arranged at burner hearth（16）Side wall on；The First air distribution plenum（13）Followed again with flue gas
Ring air compartment（14）It is arranged at grate furnace fire grate（6）Lower section；The First air distribution plenum（13）With flue gas recirculation air compartment（14）And
Row is set, and the First air distribution plenum（13）Slightly below flue gas recirculation air compartment（14）；The flue gas recirculation air compartment（14）
Top is provided with biomass fuel feedstock mouthful（17）；3rd flue（20）Inside is additionally provided with air preheater（1）And economizer
（2）；The gas recirculating fan（7）With flue gas recirculation air compartment（14）Connection；The First air blower fan（8）Match somebody with somebody with First air
Air compartment（13）Connection；The fuel slag-drip opening（9）It is arranged at First air distribution plenum（13）Tail end；The First air distribution plenum
（13）With flue gas recirculation air compartment（14）Inside is provided with tune windshield plate（15）；The flue gas recirculation air compartment（14）Pass through cigarette
Gas recirculation blower（7）With the 3rd flue（20）Connection, interface position is in economizer（2）And air preheater（1）Between.
8. the Novel flue gas EGR of biomass layer burner is applied to according to claim 7, it is characterised in that also wrapped
Include total flow regulating valve（3）, secondary air flow regulating valve（5）, an air flow control valve（10）, flue gas recirculation Flow-rate adjustment
Valve（11）With First air distribution plenum flow control valve（12）；
The total flow regulating valve（3）It is arranged at First air blower fan（8）With air preheater（1）Between；The secondary air flow regulation
Valve（5）It is arranged at First air blower fan（8）With secondary air chamber（4）Between；The First air blower fan（8）With entering close to biomass fuel
Material mouth（17）The secondary air chamber on one side（4）Between be provided with secondary air flow regulating valve（5）With an air flow control valve（10）；
The flue gas recirculation flow control valve（11）It is arranged at gas recirculating fan（7）With flue gas recirculation air compartment（14）Between；
The First air distribution plenum flow control valve（12）It is arranged at First air blower fan（8）With First air distribution plenum（13）Between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620813876.2U CN206563287U (en) | 2016-07-30 | 2016-07-30 | A kind of Novel flue gas EGR applied to biomass layer burner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620813876.2U CN206563287U (en) | 2016-07-30 | 2016-07-30 | A kind of Novel flue gas EGR applied to biomass layer burner |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090885A (en) * | 2016-07-30 | 2016-11-09 | 华南理工大学 | A kind of Novel flue gas EGR being applied to biomass layer burner |
| CN109268814A (en) * | 2018-09-29 | 2019-01-25 | 鞍山美城城市环境服务有限公司 | A kind of coal furnace reduces the combustion method of discharged nitrous oxides |
| CN110500595A (en) * | 2019-07-17 | 2019-11-26 | 光大常高新环保能源(常州)有限公司 | A method of suitable for Martin furnace waste incineration air distribution |
| CN110645567A (en) * | 2019-10-29 | 2020-01-03 | 辽宁绿源能源环保科技集团有限责任公司 | Pulverized coal boiler structure and pulverized coal combustion method |
-
2016
- 2016-07-30 CN CN201620813876.2U patent/CN206563287U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090885A (en) * | 2016-07-30 | 2016-11-09 | 华南理工大学 | A kind of Novel flue gas EGR being applied to biomass layer burner |
| CN109268814A (en) * | 2018-09-29 | 2019-01-25 | 鞍山美城城市环境服务有限公司 | A kind of coal furnace reduces the combustion method of discharged nitrous oxides |
| CN110500595A (en) * | 2019-07-17 | 2019-11-26 | 光大常高新环保能源(常州)有限公司 | A method of suitable for Martin furnace waste incineration air distribution |
| CN110645567A (en) * | 2019-10-29 | 2020-01-03 | 辽宁绿源能源环保科技集团有限责任公司 | Pulverized coal boiler structure and pulverized coal combustion method |
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