CN208349281U - Change the Novel furnace cove-shaped boiler of biomass-burning for spreader stoker boiler - Google Patents
Change the Novel furnace cove-shaped boiler of biomass-burning for spreader stoker boiler Download PDFInfo
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- CN208349281U CN208349281U CN201820893948.8U CN201820893948U CN208349281U CN 208349281 U CN208349281 U CN 208349281U CN 201820893948 U CN201820893948 U CN 201820893948U CN 208349281 U CN208349281 U CN 208349281U
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Abstract
The utility model relates to a kind of Novel furnace cove-shaped boilers for changing biomass-burning for spreader stoker boiler, belong to Industrial Boiler environmental technology field.Feed hopper is located at boiler front end, and cross beam type fire grate is located on the downside of feed hopper；Face arch is located at boiler internal and connect with front wall, forms the first combustion chamber of fuel with cross beam type fire grate；Rear arch is located at boiler internal and connect with rear wall, forms the second combustion chamber with cross beam type fire grate；Ash bucket is located at below cross beam type fire grate, and water-cooling wall is arranged vertically on surrounding in burner hearth, and primary air piping is located at below cross beam type fire grate, and secondary air channel is located at face arch, and extended rear wall is vertical backward with rear arch bottom end for wind direction.Advantage is: it is energy saving, it is good for the environment.Boiler thermal efficiency improves, operation power consumption is low, environment-friendlydenitration denitration is at low cost, NOx emission concentration is low.It is practical.
Description
Technical field
The utility model relates to Industrial Boiler environmental technology fields, in particular to a kind of to change biomass-burning for spreader stoker boiler
Novel furnace cove-shaped boiler, have reduce the effect of oxynitride discharge concentration biomass fuel boiler.
Background technique
Chain furnace is widely used in China's coal-burned industrial boiler, is the major way of industrial boilers in China combustion apparatus,
Account for about the 60% of Industrial Boiler total amount.Chain furnace is often used in town dweller concentration zones, and mostly low-altitude discharged, so that industrial pot
Furnace is to ambient enviroment, and especially town environment pollution is particularly acute, and the share that oxynitrides occupies in pollutant is larger.
Due to the limitation in the design of existing chain stoker boiler structure, oxynitride discharge concentration is higher, it is difficult to full
The environmental emission standard of foot higher and higher requirement at present.The combustion system and air supply mode of spreader feeder lead to oxygen content in flue gas
Height, oxygen content can achieve 14% in smoke evacuation, this is significantly more than normal value.Too high oxygen level can greatly increase heating power type nitrogen oxidation
Object generation probability is closed, oxynitride discharge concentration is increased.Spreader feeder is aerial by fuel throwing, since biomass fuel volatilizees
Point height, easily catches fire, therefore start to burn in the sky, is being partially formed what high temperature and heating power type oxynitrides generated
Another main cause.
In conclusion cost-effectively reducing spreader stoker boliler oxynitrides row in conjunction with biomass fuel combustion characteristic
It puts, is had a very important significance for mitigating atmosphere pollution.
Summary of the invention
The purpose of this utility model is to provide a kind of biomass fuel boiler for reducing oxynitride discharge concentration, solutions
It has determined the above problem existing for existing spreader stoker boliler.The combustion system of the utility model boiler is layer combustion, and chain is to rotate forward, furnace
Row is cross beam type fire grate, the dismounting of original spreader feeder is changed to the stokehold hopper with batcher, air blower, draws secondary air fan
Blower, fire grate speed reducer, batcher whole frequency control.Extended by face arch and extended backward with rear arch, formed and be suitable for throwing coal
Machine furnace changes the novel chimney arch of biomass-burning.Secondary Air is reset, increases deashing facility, original air preheater is changed to province's coal
Device improves the thermal efficiency of boiler.
The above-mentioned purpose of the utility model is achieved through the following technical solutions:
Change the Novel furnace cove-shaped boiler of biomass-burning for spreader stoker boiler, feed hopper 1 is located at boiler front end, cross beam type fire grate 2
Positioned at 1 downside of feed hopper；Face arch 3 is located at boiler internal and connect with front wall, forms the first combustion chamber of fuel with cross beam type fire grate 2；
Rear arch 4 is located at boiler internal and connect with rear wall, forms the second combustion chamber with cross beam type fire grate 2；Ash bucket 6 is located under cross beam type fire grate
Side, water-cooling wall 5 are arranged vertically on surrounding in burner hearth, and primary air piping 7 is located at 2 lower section of cross beam type fire grate, before secondary air channel 8 is located at
Arch, extended rear wall is vertical backward with rear arch bottom end for wind direction.
The face arch 3 is to furnace elongated central 5%.
The bottom end of the rear arch 4 extends the 10% of total length backward.
Spacing between the face arch 3 and rear arch 4 is maintained at 2.5 meters.
Under the First air of the primary air piping 7, the Secondary Air of secondary air channel 8 and boiler furnace collective effect, formed " α "
The flow of flue gas of type.Biomass fuel will volatilize a point sufficiently precipitation in the first combustion chamber, be taken to by the flue gas stream of formation " α " type
It is reacted in the second combustion chamber of upper furnace, reduces the generation of heating power type oxynitrides.
The utility model has the beneficial effects that:
1, boiler thermal efficiency improves: total boiler efficiency is increased to 5-10%, has certain economic benefit.
2, operation power consumption is low: all main motor whole frequency conversions reduce the usage amount of electricity, greatly save operating cost.
3, environment-friendlydenitration denitration is at low cost: comparison flue gases purification, such as (SNCR denitration mode), the utility model passes through improvement
Burning process carries out cleaning burning, reduces oxynitrides from fire end and generates, and no longer needs to flue gas emission end and increases smoke pollution
Object processing equipment greatly reduces fume treatment cost.
4, NOx emission concentration is low: by greatly reducing the concentration of emission of NOx for the improvement of spreader stoker boiler burning process.
It is energy saving, it is good for the environment.It is practical.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The illustrative example and its explanation of the utility model do not constitute the improper limit to the utility model for explaining the utility model
It is fixed.
Fig. 1 is the schematic view of the front view of the utility model；
Fig. 2 is the left view structural representation of the utility model.
In figure: 1, feed hopper；2, cross beam type fire grate；3, face arch；4, rear arch；5, water-cooling wall；6, ash bucket；7, primary air piping；
8, secondary air channel.
Specific embodiment
The detailed content and its specific embodiment of the utility model are further illustrated with reference to the accompanying drawing.
Referring to shown in Fig. 1 and Fig. 2, the combustion system of the utility model boiler is layer combustion, and chain is to rotate forward, and fire grate is crossbeam
The dismounting of original spreader feeder is changed to the stokehold hopper with batcher, air blower, secondary air fan, air-introduced machine, fire grate by formula fire grate
Speed reducer, batcher whole frequency control.Change face arch and rear arch, is formed and be suitable for the Novel furnace that spreader stoker boiler changes biomass-burning
Arch.Secondary Air is reset, increases deashing facility, original air preheater is changed to economizer, improves the thermal efficiency of boiler.
Specific structure is as follows: feed hopper 1 is located at boiler front end, and cross beam type fire grate 2 is located at 1 downside of feed hopper；Face arch 3 is located at boiler internal
The space that the first combustion chamber of fuel formed with cross beam type fire grate 2 is increased to furnace elongated central 5% is connect with front wall；Rear arch 4
It is connect positioned at boiler internal with rear wall, and extends total length 10% backward in rear arch bottom end, increased and the formation of cross beam type fire grate 2
The second combustion chamber space；Face arch 3 and 4 spacing of rear arch are maintained at 2.5 meters；Ash bucket 6 is located at below cross beam type fire grate, water-cooling wall
5 are arranged vertically on surrounding in burner hearth, and primary air piping 7 is located at 2 lower section of cross beam type fire grate, and secondary air channel 8 is located at face arch position, wind direction
Extended rear wall is vertical backward with rear arch bottom end；Flue gas is formed " α " via First air, Secondary Air and boiler furnace collective effect
The flow of flue gas of type.Biomass fuel will volatilize a point sufficiently precipitation in the first combustion chamber, be taken to by the flue gas stream of formation " α " type
It is reacted in the second combustion chamber of upper furnace, reduces the generation of heating power type oxynitrides.
The foregoing is merely the preferred embodiments of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.It is all to made by the utility model it is any modification,
Equivalent replacement, improvement etc., should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of Novel furnace cove-shaped boiler for changing biomass-burning for spreader stoker boiler, it is characterised in that: before feed hopper (1) is located at boiler
End, cross beam type fire grate (2) are located on the downside of feed hopper (1)；Face arch (3) is located at boiler internal and connect with front wall, with cross beam type fire grate
(2) the first combustion chamber of fuel is formed；Rear arch (4) is located at boiler internal and connect with rear wall, forms the second combustion with cross beam type fire grate (2)
Burn room；Ash bucket (6) is located at below cross beam type fire grate, and water-cooling wall (5) is arranged vertically on surrounding in burner hearth, and primary air piping (7) is located at
Below cross beam type fire grate (2), secondary air channel (8) is located at face arch, and extended rear wall is vertical backward with rear arch bottom end for wind direction.
2. the Novel furnace cove-shaped boiler according to claim 1 for changing biomass-burning for spreader stoker boiler, it is characterised in that: described
Face arch (3) and rear arch (4) between spacing be maintained at 2.5 meters.
3. the Novel furnace cove-shaped boiler according to claim 1 for changing biomass-burning for spreader stoker boiler, it is characterised in that: described
The First air of primary air piping (7), under the Secondary Air of secondary air channel (8) and boiler furnace collective effect, form the flue gas of " α " type
Flowing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820893948.8U CN208349281U (en) | 2018-06-11 | 2018-06-11 | Change the Novel furnace cove-shaped boiler of biomass-burning for spreader stoker boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820893948.8U CN208349281U (en) | 2018-06-11 | 2018-06-11 | Change the Novel furnace cove-shaped boiler of biomass-burning for spreader stoker boiler |
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| CN208349281U true CN208349281U (en) | 2019-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820893948.8U Active CN208349281U (en) | 2018-06-11 | 2018-06-11 | Change the Novel furnace cove-shaped boiler of biomass-burning for spreader stoker boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432159A (en) * | 2020-11-20 | 2021-03-02 | 哈尔滨工业大学 | Reverse alpha-shaped flame air distribution type grate-fired furnace combustion system and method |
-
2018
- 2018-06-11 CN CN201820893948.8U patent/CN208349281U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432159A (en) * | 2020-11-20 | 2021-03-02 | 哈尔滨工业大学 | Reverse alpha-shaped flame air distribution type grate-fired furnace combustion system and method |
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