CN206626602U - A kind of biomass bundling fuel chain-grate boiler air feed system - Google Patents
A kind of biomass bundling fuel chain-grate boiler air feed system Download PDFInfo
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- CN206626602U CN206626602U CN201720348362.9U CN201720348362U CN206626602U CN 206626602 U CN206626602 U CN 206626602U CN 201720348362 U CN201720348362 U CN 201720348362U CN 206626602 U CN206626602 U CN 206626602U
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Abstract
The utility model discloses a kind of biomass bundling fuel chain-grate boiler air feed system, it includes being arranged on primary air system below traveling-grate stoker, and primary air system along arrange successively preceding wind cabin section, middle nozzle segment and the rear wind cabin section of setting of traveling-grate stoker conveying direction by forming；Preceding wind cabin section includes at least one wind cabin, and the air-out direction of wind cabin points to traveling-grate stoker；Middle nozzle segment includes injection supervisor, injection branch pipe and nozzle, injection supervisor arranges along traveling-grate stoker conveying direction, multiple injection branch pipes are disposed with along its length on injection supervisor, arrangement sets multiple nozzles to each injection branch pipe along its length, and the air-out direction of nozzle points to traveling-grate stoker；Wind cabin section includes at least one wind cabin afterwards, and the air-out direction of wind cabin points to traveling-grate stoker.The whole combustion process of biomass bundling fuel is combined by the utility model with air feed system, according to different combustion phases, arranges different air supply modes, more preferable adapted biomass bundling fuel chain boiler combustion.
Description
Technical field
The utility model belongs to biomass combustion technical field, and in particular to a kind of biomass bundling fuel chain-grate boiler supplies
Wind system.
Background technology
At present, boiler air supply mode mainly has：Malleation air feed, negative pressure air feed, balance three kinds of air supply modes of air feed, and it is biological
Matter combustion system is broadly divided into：It is traditional to dissipate burning, powder suspension burning, bundling burning, shaped granule four kinds of combustion systems of burning, no
Same combustion system, different types of boiler select different air supply modes.Life is mainly used at present for biomass chain-grate boiler
Material bundling fuel and shaped fuel, at present biomass chain-grate boiler air supply mode indiscriminately imitate combustion coal chain boiler air feed system substantially
System, First air use wind cabin even distributing wind mode.Because biomass bundling fuel has, volume is big, air is not easy to permeate, burns
The characteristics of later stage flying dust is serious, therefore the most significant shortcoming of bundling fuel combustion is to be not easy to grill thoroughly, the combustion process of bundling fuel
There is very big difference with other fuel combustions, be unsuitable for indiscriminately imitating original chain-grate boiler air feed system.Original wind cabin even distributing wind mode
Cause bundling fuel combustion situation and thermo parameters method in burner hearth undesirable.
Utility model content
The utility model is in order to solve weak point of the prior art, there is provided a kind of biomass bundling fuel chain-grate boiler
Air feed system, the whole combustion process of biomass bundling fuel is combined with air feed system, according to different combustion phases, arranged
Different air supply modes, more preferable adapted biomass bundling fuel chain boiler combustion.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：A kind of biomass bundling fuel chain
Boiler air feed system, it includes being arranged on the primary air system below traveling-grate stoker, and primary air system along traveling-grate stoker by conveying
Direction is arranged the preceding wind cabin section of setting, middle nozzle segment and rear wind cabin section composition successively；Preceding wind cabin section includes at least one wind cabin, wind
The air-out direction in storehouse points to traveling-grate stoker；Middle nozzle segment includes injection supervisor, injection branch pipe and nozzle, is blown supervisor along chain furnace
Conveying direction arrangement is arranged, multiple injection branch pipes are disposed with along its length on injection supervisor, it is each to be blown the equal edge of branch pipe
The arrangement of its length direction sets multiple nozzles, and the air-out direction of nozzle points to traveling-grate stoker；Wind cabin section includes at least one wind afterwards
Storehouse, the air-out direction of wind cabin point to traveling-grate stoker.
Each injection branch pipe is perpendicular and parallel with the traveling-grate stoker with the injection supervisor.
It also includes the secondary air system being arranged on chimney arch, before chimney arch is included in chain fire-gate be sequentially arranged above
Arch, hogging and rear arch, hogging are made up of vertical foldede flame wall, and the top of hogging is connected with burner hearth crown wall, rear arch by arch wall and
Extend vertically upward firebreak composition, firebreak positioned at face arch and rear arch between, and the top of firebreak and push up furnace wall between
Exhaust gases passes are remained with, the bottom of firebreak and the front end of arch wall connect, and the rear end of arch wall is downwardly inclined and extended to and rear stove
It is connected thereto at wall, exhaust gases passes is remained between the bottom of hogging and the arch wall of rear arch；Respectively it is provided with face arch and rear arch
Overfiren air port, overfiren air port is is oppositely arranged on overfiren air port and rear arch on face arch, and overfiren air port is located at two on rear arch on face arch
The upside in secondary air port, and the ejection angle of overfiren air port is to tilt down on face arch, the ejection angle of overfiren air port is on rear arch
It is inclined upwardly.
It also includes the smoke processing system for being arranged on smoke outlet, and smoke processing system is included along air-out direction successively
Economizer, air preheater, cyclone dust collectors and the sack cleaner set is connected, economizer is connected with air outlet.
Air-introduced machine is arranged on the smoke processing system.
Frequency converter is installed on the air-introduced machine.
The air feed blower fan of the primary air system and secondary air system selects air blower.
Frequency converter is installed on the air blower.
The beneficial effects of the utility model are：
1）The biomass bundling fuel chain-grate boiler air feed system has with laboratory bundling fuel thermogravimetric experimental combustion process
Machine combines, and combustion process of the bundling fuel on chain is divided into different combustion phases, different combustion phases are from different
Air supply mode and air quantity；
The combustion process of the utility model combination biomass bundling fuel, according to bundling fuel combustion feature, by biomass
The whole combustion process of bundling fuel is combined with air feed system, and according to the experimental data on thermogravimetric testing stand, biomass is beaten
Tie whole combustion process of the right fuel on traveling-grate stoker and be divided into the different stages：Moisture evaporation stage, fugitive constituent separate out rank
Section, fugitive constituent and fixed carbon burning coexistence phase, residual carbon combustion phases.Because in different combustion phases, combustion position is not
Together, required air force is also different.
At the initial stage of burning（Now biomass bundling fuel combustion is simultaneously moved to preceding wind cabin section）, fired for biomass bundling fuel
Moisture evaporation and fugitive constituent precipitation phase are burnt, also unstable due to burning, institute's required airflow, wind speed are all unsuitable excessive, therefore, preceding
First air uses wind cabin even distributing wind at wind cabin section 2, and air quantity, wind speed are all smaller, with the unstable shape of initiation combustion that adapts to burn
Condition.
In burning mid-term（Now biomass bundling fuel combustion is simultaneously moved to middle nozzle segment front portion）, fired for biomass bundling
Material burning Volatile and fixed carbon burning coexistence phase, because biomass bundling fuel itself has the characteristics of size is big,
Temperature is not easy to spread with oxygen, and therefore, in bundling fuel combustion mid-term, fugitive constituent precipitation phase understands last longer, with consolidating
The long period coexists in the burning for determining carbon.In order that oxygen can be penetrated into inside bundling fuel, strengthen bundling fuel internal-combustion,
This stage uses high speed nozzle air supply mode（3 air quantity abundances, wind speed are larger before i.e. middle nozzle segment）, by First air to blow at a high speed
Enter inside bundling fuel.
In the burning middle and later periods（Now biomass bundling fuel combustion is simultaneously moved to middle nozzle segment rear portion）, the volatilization of bundling fuel
Part substantially completely separate out, be the combustion phases of fixed carbon, now bundling fuel is more loose, but still keeps certain outer
Shape size, to make oxygen go deep into inside bundling fuel, strengthen the burning of fixed carbon inside bundling fuel, burn the middle and later periods once
Elegance slow speed jet（The i.e. middle rear portion air quantity of nozzle segment 3 weakens, and wind speed is smaller）, strengthen the combustion of fixed carbon inside bundling fuel
Burn.
Phase after combustion（Now biomass bundling fuel combustion is simultaneously moved to rear wind cabin section）, bundling fuel appearance and size is
Burning is caved in, and similar to scattered burning, wind is used because biomass combustion flying dust phenomenon is than more serious, therefore in the bundling fuel combustion later stage
Storehouse cloth wind, make the burning of residual charcoal totally.
2）It is not easy to grill thoroughly for biomass bundling fuel, the characteristics of oxygen is not easy to permeate, and fugitive constituent is not easy to separate out, First air
The middle nozzle segment of system chooses multiple uniformly arrangements, and the nozzle with certain penetration power carries out air feed, and oxygen is penetrated into bundling combustion
Material is internal, while takes fugitive constituent out of burning.
3）Primary air system is combined wind cabin cloth wind with nozzle cloth wind facies, in flameholding, after being not easy in the burning grilled thoroughly
Phase uses nozzle cloth wind, uses wind cabin cloth wind in the serious late combustion of flying dust, improves bundling fuel combustion situation, enhance
Combustion process.
4）The utility model also includes being arranged on secondary air system on chimney arch, chimney arch be included in chain fire-gate top according to
Face arch, hogging and the rear arch of secondary setting, hogging are made up of vertical foldede flame wall, the gear that rear arch extends by arch wall and vertically upward
Wall with flues forms, and firebreak remains with exhaust gases passes between face arch and rear arch between the top of firebreak and top furnace wall, keeps off
The bottom of wall with flues and the front end of arch wall connect, and the rear end of arch wall is downwardly inclined and extended to being connected thereto at rear furnace wall, face arch
Be respectively provided with overfiren air port on rear arch, overfiren air port is is oppositely arranged on overfiren air port and rear arch on face arch, two on face arch
Secondary air port is located at the upside of overfiren air port on rear arch, and the ejection angle of overfiren air port is to tilt down on face arch, two on rear arch
The ejection angle in secondary air port is is inclined upwardly, by above-mentioned arrangement, secondary air system with certain exhaust duct of inclination angle arranged relative two,
Because biomass fugitive constituent is higher, so extracting flue gas as secondary wind regime, on the one hand cause fugitive constituent uncombusted in flue gas
Fully burning, the flue gas disturbance in burner hearth is on the other hand strengthened, improves stove chamber inner combustion situation.
5）The utility model also includes the smoke processing system for being arranged on smoke outlet, and smoke processing system includes edge and gone out
Wind direction is sequentially connected economizer, air preheater, cyclone dust collectors and the sack cleaner of setting, and economizer connects with air outlet
Connect；Air-introduced machine is arranged on the smoke processing system, is easy to handle the flue gas of discharge, reduces pollution.
6）The air feed blower fan of primary air system is variable ratio frequency changer blower fan, and wind cabin air quantity is adjustable, and nozzle is replaceable, to adapt to difference
The biomass bundling fuel of species, in the change of different combustion phases institutes required airflow；
First air, Secondary Air use air blower, and burning initial stage and later stage First air use wind cabin cloth wind, and flue gas afterbody uses
Air-introduced machine, to reduce fly ash content in flue gas.Air blower and air-introduced machine change rotation speed of fan using frequency converter, and then adjust wind
The size of amount, realizes Boiler pressure control.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the enlarged drawing of primary air system in Fig. 1
Fig. 3 is the front view of middle nozzle segment；
Fig. 4 is the top view of middle nozzle segment；
Fig. 5 is the right view of middle nozzle segment.
Embodiment
Specific embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.
As shown in Figures 1 to 5, a kind of biomass bundling fuel chain-grate boiler air feed system of the present utility model, it includes
It is arranged on the primary air system of the lower section of traveling-grate stoker 1, primary air system by arranging setting successively along traveling-grate stoker conveying direction
Preceding wind cabin section 2, middle nozzle segment 3 and rear wind cabin section 4 form；Preceding wind cabin section 2 includes at least one wind cabin, and the air-out direction of wind cabin refers to
To traveling-grate stoker 1；Middle nozzle segment 3 includes injection supervisor 31, injection branch pipe 32 and nozzle 33, and injection supervisor 31 is defeated along traveling-grate stoker
Send direction to arrange, be disposed with multiple injection branch pipes 32 on injection supervisor 31 along its length, each injection branch pipe 32 is equal
Supervisor 31 is perpendicular and parallel with traveling-grate stoker 1 with injection.Arrangement setting is more along its length for each injection branch pipe 32
Individual nozzle 33, the air-out direction of nozzle 33 point to traveling-grate stoker 1；Wind cabin section 4 includes at least one wind cabin, the air-out side of wind cabin afterwards
To sensing traveling-grate stoker 1.
It is not easy to grill thoroughly for biomass bundling fuel, the characteristics of oxygen is not easy to permeate, and fugitive constituent is not easy to separate out, First air system
The middle nozzle segment 3 of system chooses multiple uniformly arrangements, and the nozzle 33 with certain penetration power carries out air feed, and oxygen is penetrated into bundling combustion
Material is internal, while takes fugitive constituent out of burning；First air is combined wind cabin cloth wind with nozzle cloth wind facies, in flameholding, is not easy
The burning middle and later periods grilled thoroughly uses nozzle cloth wind, uses wind cabin cloth wind in the serious late combustion of flying dust, improves bundling fuel
Combustion position, enhance combustion process.
The utility model also includes the secondary air system being arranged on chimney arch, and chimney arch is included in chain fire-gate top successively
Face arch 5, hogging 6 and the rear arch 7 of setting, hogging 6 are made up of vertical foldede flame wall, and the top of hogging 6 is connected with burner hearth crown wall, after
The firebreak that arch 7 extends by arch wall and vertically upward forms, and firebreak is between face arch and rear arch, and the top of firebreak
Exhaust gases passes are remained between the furnace wall of top, the bottom of firebreak and the front end of arch wall are connected, and the rear end of arch wall is downwardly inclined simultaneously
Extend to being connected thereto at rear furnace wall, exhaust gases passes are remained between the bottom of hogging 6 and the arch wall of rear arch 7；Face arch 5 is with after
Respectively be provided with overfiren air port on arch 7, overfiren air port 71 is to be oppositely arranged on overfiren air port 51 and rear arch 7 on face arch 5, face arch 5
Upper overfiren air port 51 is located at the upside of overfiren air port 71 on rear arch 7, and the ejection angle of overfiren air port 51 is to dip down on face arch 5
Tiltedly, the ejection angle of overfiren air port 71 is to be inclined upwardly on rear arch 7.
By above-mentioned arrangement, secondary air system with certain exhaust duct of inclination angle arranged relative two, due to biomass fugitive constituent compared with
Height, so extracting flue gas as secondary wind regime, on the one hand fugitive constituent uncombusted in flue gas is fully burnt, on the other hand added
Flue gas disturbance in strong burner hearth, improves stove chamber inner combustion situation.
The utility model also includes the smoke processing system for being arranged on smoke outlet, and smoke processing system is included along air-out
Direction is sequentially connected economizer 8, air preheater 9, cyclone dust collectors 10 and the sack cleaner 11 of setting, and economizer 8 is with going out
Air port connects.
Air-introduced machine is arranged on the smoke processing system, frequency converter is installed on air-introduced machine.Smoke processing system is easy to pair
The flue gas of discharge is handled, and reduces pollution.
The air feed blower fan of the primary air system and secondary air system selects air blower, and frequency conversion is provided with air blower
Device.The air feed blower fan of primary air system is variable ratio frequency changer blower fan, and wind cabin air quantity is adjustable, and nozzle is replaceable, different types of to adapt to
Biomass bundling fuel, in the change of different combustion phases institutes required airflow；
First air, Secondary Air use air blower, and burning initial stage and later stage First air use wind cabin cloth wind, and flue gas afterbody uses
Air-introduced machine, to reduce fly ash content in flue gas.Air blower and air-introduced machine change rotation speed of fan using frequency converter, and then adjust wind
The size of amount, realizes Boiler pressure control.Also actual intake can be recorded using mass air flow sensor at air blower and air-introduced machine simultaneously,
To reduce by error caused by the theoretical intake of frequency converter calculating.
The utility model organically combines with laboratory bundling fuel thermogravimetric experimental combustion process, by bundling fuel on chain
Combustion process be divided into different combustion phases, different combustion phases select different air supply mode and air quantity；
The combustion process of the utility model combination biomass bundling fuel, according to bundling fuel combustion feature, by biomass
The whole combustion process of bundling fuel is combined with air feed system, and according to the experimental data on thermogravimetric testing stand, biomass is beaten
Tie whole combustion process of the right fuel on traveling-grate stoker and be divided into the different stages：Moisture evaporation stage, fugitive constituent separate out rank
Section, fugitive constituent and fixed carbon burning coexistence phase, residual carbon combustion phases.Because in different combustion phases, combustion position is not
Together, required air force is also different.
At the initial stage of burning（Now biomass bundling fuel combustion is simultaneously moved to preceding wind cabin section 2）, it is biomass bundling fuel
Burn moisture evaporation and fugitive constituent precipitation phase, also unstable due to burning, and institute's required airflow, wind speed are all unsuitable excessive, therefore,
First air uses wind cabin even distributing wind at preceding wind cabin section 2, and air quantity, wind speed are all smaller, and to adapt to burn, initiation combustion is unstable
Situation.
In burning mid-term（Now biomass bundling fuel combustion is simultaneously moved to the middle front portion of nozzle segment 3）, it is biomass bundling
Fuel combustion Volatile and fixed carbon burning coexistence phase, because biomass bundling fuel itself has the big spy of size
Point, temperature are not easy to spread with oxygen, and therefore, in bundling fuel combustion mid-term, fugitive constituent precipitation phase understands last longer, with
The long period coexists in the burning of fixed carbon.In order that oxygen can be penetrated into inside bundling fuel, strengthen bundling fuel internal-combustion,
High speed nozzle air supply mode is used in this stage（3 air quantity abundances, wind speed are larger before i.e. middle nozzle segment）, by First air with a high speed
It is blown into inside bundling fuel.
In the burning middle and later periods（Now biomass bundling fuel combustion is simultaneously moved to the middle rear portion of nozzle segment 3）, bundling fuel waves
Hair part substantially completely separates out, is the combustion phases of fixed carbon, and now bundling fuel is more loose, but still keeps necessarily
Appearance and size, to make oxygen go deep into inside bundling fuel, strengthen the burning of fixed carbon inside bundling fuel, in the burning middle and later periods one
Secondary elegance slow speed jet（The i.e. middle rear portion air quantity of nozzle segment 3 weakens, and wind speed is smaller）, strengthen the combustion of fixed carbon inside bundling fuel
Burn.
Phase after combustion（Now biomass bundling fuel combustion is simultaneously moved to rear wind cabin section 4）, bundling fuel appearance and size
Burn and caved in, similar to scattered burning, used because biomass combustion flying dust phenomenon is than more serious, therefore in the bundling fuel combustion later stage
Wind cabin cloth wind, make the burning of residual charcoal totally.
Above example is only to illustrative and not limiting the technical solution of the utility model, although with reference to above-described embodiment pair
The utility model is described in detail, it will be understood by those within the art that：The utility model can still be entered
Row modification or equivalent substitution, without departing from any modification or partial replacement of spirit and scope of the present utility model, it all should
Cover among right of the present utility model.
Claims (8)
- A kind of 1. biomass bundling fuel chain-grate boiler air feed system, it is characterised in that：It includes being arranged on below traveling-grate stoker Primary air system, primary air system by along traveling-grate stoker conveying direction arrange successively the preceding wind cabin section of setting, middle nozzle segment and Wind cabin section forms afterwards；Preceding wind cabin section includes at least one wind cabin, and the air-out direction of wind cabin points to traveling-grate stoker；Middle nozzle segment includes Injection supervisor, injection branch pipe and nozzle, injection are responsible for along traveling-grate stoker conveying direction and arranged, on injection supervisor along its length Multiple injection branch pipes are disposed with, arrangement sets multiple nozzles, the air-out of nozzle to each injection branch pipe along its length Point to traveling-grate stoker in direction；Wind cabin section includes at least one wind cabin afterwards, and the air-out direction of wind cabin points to traveling-grate stoker.
- 2. biomass bundling fuel chain-grate boiler air feed system according to claim 1, it is characterised in that：Each injection branch Injection supervisor is perpendicular and parallel with the traveling-grate stoker described in Guan Junyu.
- 3. biomass bundling fuel chain-grate boiler air feed system according to claim 1 or 2, it is characterised in that：It is also wrapped The secondary air system being arranged on chimney arch is included, chimney arch is included in the chain fire-gate face arch being sequentially arranged above, hogging and rear arch, Hogging is made up of vertical foldede flame wall, and the top of hogging is connected with burner hearth crown wall, what rear arch extended by arch wall and vertically upward Firebreak forms, and firebreak remains with exhaust gases passes between face arch and rear arch between the top of firebreak and top furnace wall, The bottom of firebreak and the front end of arch wall connect, and the rear end of arch wall is downwardly inclined and extended to being connected thereto at rear furnace wall, in Exhaust gases passes are remained between the bottom of arch and the arch wall of rear arch；Overfiren air port is respectively provided with face arch and rear arch, on face arch Overfiren air port is is oppositely arranged on overfiren air port and rear arch, and overfiren air port is located at the upside of overfiren air port on rear arch on face arch, and The ejection angle of overfiren air port is tilts down on face arch, and the ejection angle of overfiren air port is to be inclined upwardly on rear arch.
- 4. biomass bundling fuel chain-grate boiler air feed system according to claim 3, it is characterised in that：It also includes setting Put the smoke processing system in smoke outlet, smoke processing system include along air-out direction be sequentially connected setting economizer, Air preheater, cyclone dust collectors and sack cleaner, economizer are connected with air outlet.
- 5. biomass bundling fuel chain-grate boiler air feed system according to claim 4, it is characterised in that：At the flue gas Air-introduced machine is arranged in reason system.
- 6. biomass bundling fuel chain-grate boiler air feed system according to claim 5, it is characterised in that：The air-introduced machine On frequency converter is installed.
- 7. biomass bundling fuel chain-grate boiler air feed system according to claim 3, it is characterised in that：The First air The air feed blower fan of system and secondary air system selects air blower.
- 8. biomass bundling fuel chain-grate boiler air feed system according to claim 7, it is characterised in that：The air blower On frequency converter is installed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720348362.9U CN206626602U (en) | 2017-04-05 | 2017-04-05 | A kind of biomass bundling fuel chain-grate boiler air feed system |
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| CN201720348362.9U CN206626602U (en) | 2017-04-05 | 2017-04-05 | A kind of biomass bundling fuel chain-grate boiler air feed system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838971A (en) * | 2017-04-05 | 2017-06-13 | 河南农业大学 | A kind of biomass bundling fuel chain-grate boiler air feed system |
-
2017
- 2017-04-05 CN CN201720348362.9U patent/CN206626602U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106838971A (en) * | 2017-04-05 | 2017-06-13 | 河南农业大学 | A kind of biomass bundling fuel chain-grate boiler air feed system |
| CN106838971B (en) * | 2017-04-05 | 2023-11-03 | 河南农业大学 | Biomass bundling fuel chain boiler air supply system |
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