CN206958896U - A kind of decoupling combustion device - Google Patents

A kind of decoupling combustion device Download PDF

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Publication number
CN206958896U
CN206958896U CN201720771828.6U CN201720771828U CN206958896U CN 206958896 U CN206958896 U CN 206958896U CN 201720771828 U CN201720771828 U CN 201720771828U CN 206958896 U CN206958896 U CN 206958896U
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China
Prior art keywords
area
mid
board
ventilating opening
semicoke
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CN201720771828.6U
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Inventor
刘新华
郝江平
张楠
韩健
李静海
白丁荣
王振平
梁斌
张海燕
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Institute of Process Engineering of CAS
Yankuang Group Corp Ltd
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Institute of Process Engineering of CAS
Yankuang Group Corp Ltd
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Abstract

The utility model provides a kind of decoupling combustion device, and the decoupling combustion device includes front wall, mid-board, rear wall with flues, blower unit and the second fire grate;Mid-board is between front wall and rear wall with flues;Charge door, the first ventilating opening and the second ventilating opening are disposed with front wall from top to bottom;Blower unit connects with the first ventilating opening;Second fire grate is arranged on the bottom in space between front wall and mid-board, highly between the first ventilating opening and the second ventilating opening;Burner is formed between mid-board bottom and the second fire grate;The upper space in pyrolytic gasification area space between front wall and mid-board;Semicoke area is pyrolytic gasification area bottom, the space of the top of the second fire grate.The decoupling combustion device can increase decoupling burning semicoke area scope, and cause semicoke area and the ventilation of pyrolytic gasification area to be more easy to Balance route, strengthen the adaptability to fuel character and burner capacity, the reaction speed in optimal control pyrolytic gasification area and semicoke area.

Description

A kind of decoupling combustion device
Technical field
The utility model belongs to coal combustion technology field, is related to a kind of decoupling combustion device.
Background technology
In decoupling combustion device, coal gas by pyrolysis and gasification will pass through the semicoke area after-flame of high temperature hyperoxia, while in combustion process Caused part NOx can be reduced to N in semicoke area2.Physical dimension and Ventilation Control centering miniature coal the decoupling combustion in semicoke area The performance for burning device has a significant impact.Semicoke area is too small or Ventilation Control is improper, then is unfavorable for NOx reduction control and jet-black etc. The after-flame of combustible.The semicoke plot structure design of existing middle-size and small-size coal-fired decoupling combustion device, relies primarily on determination pyrolytic gasification The fire grate inclination angle of room and burner height, to control the physical dimension in semicoke area and ventilation to distribute, thus the semicoke area at burner position Flowing resistance is minimum, and air flux is maximum.Air-flow operation length influences flow resistance, under the air distribution that this resistance determines, semicoke Burning is concentrated mainly on mid-board bottom to the delta-shaped region of fire grate front and back end.Coal gas by pyrolysis and gasification is mainly in the triangle half Jiao Qu apex region is by the way that the residence time in semicoke area is too small.
Although increase burner height can suitably increase semicoke area scope, not only cause the ventilation deficiency in semicoke area, and Because oxygen is more in bottom consumption so that top coal gas by pyrolysis and gasification anoxycausis, combustible can not after-flames, generation black smoke etc. Pollutant.
The ventilation of increase top coal filling hole can increase the scope in semicoke area, but can reduce the scope in pyrolytic gasification area, weak Change the reduction reaction in Volatile stage, be unfavorable for reducing NOx discharge.
In addition, the semicoke area combustion intensity, which crosses conference, make it that temperature is too high in semicoke area, desulfuration in furnace efficiency is reduced.
The A of CN 103471089 disclose a kind of coal-fired decoupling combustion device and combustion method, including body of heater and positioned at body of heater The air compartment of lower section, described body of heater include:Upper partition wall, be divided into below the upper partition wall inside and outside first time partition wall and the Two times partition walls, wherein, the first fire grate, first time partition wall and second are set up between the top of first time partition wall of inner side and sidewall of the furnace body The second fire grate is provided between lower partition wall bottom;Gasification and pyrolysis area and half are formed between the top of first fire grate and upper partition wall Jiao Qu, the semicoke area are located at below gasification and pyrolysis area;Described first time partition wall and second time partition wall forms coke area.But It is that its semicoke area scope is still smaller, needs further to improve, and the ventilation in its semicoke area and pyrolytic gasification area can not Balance route.
Utility model content
In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of decoupling combustion device, it is described Decoupling combustion device can increase decoupling burning semicoke area scope, and cause semicoke area and the ventilation of pyrolytic gasification area to be more easy to balanced control System, the reaction speed in optimal control pyrolytic gasification area and semicoke area, strengthens the adaptability to fuel character and burner capacity.
To use following technical scheme up to this purpose, the utility model:
The utility model provides a kind of decoupling combustion device, and the decoupling combustion device includes front wall, mid-board, rear fire Wall, blower unit and the second fire grate;
The mid-board is between front wall and rear wall with flues;
Charge door, the first ventilating opening and the second ventilating opening are disposed with the front wall from top to bottom;
The blower unit connects with the first ventilating opening, for by gas (be usually air, or oxygen containing other gas Body) space that introduces between front wall and mid-board, especially into pyrolytic gasification or its transition region;
Second fire grate is arranged on the bottom in space between front wall and mid-board, highly positioned at the first ventilating opening and second Between ventilating opening;
Burner is formed between mid-board bottom and the second fire grate;
The upper space in pyrolytic gasification area space between front wall and mid-board;The semicoke area is pyrolytic gasification area Bottom, the second fire grate top space.
The decoupling combustion device can increase decoupling burning semicoke area by the setting of its specific structure and blower unit Scope, and cause semicoke area and the ventilation of pyrolytic gasification area to be more easy to Balance route, optimal control pyrolytic gasification area is anti-with semicoke area Speed is answered, strengthens the adaptability to fuel character and burner capacity.
The set location of wall can be adjusted according to being actually needed after described, and the effect of rear wall has two:First, prevent from firing Material and semicoke are spilt from jet-burner, second, flue gas is led into exhaust outlet.
The blower unit includes the first fire grate.Or
The blower unit includes airway tube, and hole is provided with the tube wall of the airway tube.
As long as the blower unit can introduce a gas into the space between mid-board and front wall, it sets form not It is confined to the first fire grate and airway tube.
The blower unit activity is set, to facilitate the ventilation in adjustment semicoke area and pyrolytic gasification area.
The inclination angle of the blower unit and the angle of horizontal direction are 0-70 °, such as 2 °, 3 °, 4 °, 5 °, 6 °, 10 °, 20 °, 30 °, 50 °, 60 ° or 65 ° etc..In this angular range, the ventilation in pyrolytic gasification area and semicoke area controls more balanced.
The blower unit is connected with inclination-angle regulating device, and the form of the inclination-angle regulating device is not fixed, can be according to reality Border situation is selected, as long as can reach the purpose of the angle of regulation blower unit and horizontal plane.
Combustion method using the decoupling combustion device includes:
Solid fuel is added in the decoupling combustion device by charge door, is entered with the first ventilating opening and the second ventilating opening Combustion reaction occurs for air, wherein, the overdraught amount of solid fuel is less than bottom, and solid fuel is in the decoupling combustion device In pass through pyrolytic gasification area and semicoke area successively, waste residue caused by burning falls discharge, flue gas caused by burning through the second fire grate Discharged through burner.
The combustion method can adjust the air distribution in semicoke area and the influence to pyrolytic gasification area, so that also can optimal control heat The reaction speed of gasification zone and semicoke area is solved, increases the adaptability to fuel (such as coal).
Number range described in the utility model not only includes the above-mentioned point value enumerated, in addition to does not include above-mentioned Arbitrary point value between number range, as space is limited and the consideration for simplicity, described in the utility model no longer exclusive list The specific point value that scope includes.
" first " and " second " described in the utility model are to distinguish all parts.
Compared with prior art, the beneficial effects of the utility model are:
For decoupling combustion device provided by the utility model due to the effect of blower unit, the air that the first ventilating opening enters can Reach the height far above the second fire grate, be especially the increase in the draught capacity of front wall fuel, so as to change air-flow flow, expand The scope of combustion space and semicoke area;Conversion zone is increased, is advantageous to improve the utilization rate that burner deposits coal space;Increase Big semicoke area, not only causes coal gas by pyrolysis and gasification to increase by the time in semicoke area, can also reduce the average combustion in semicoke area Intensity and temperature peak so that the region ignition temperature peak value reduce by 100 DEG C or so, advantageously reduce NOx discharge and Improve desulfuration in furnace efficiency;
Decoupling combustion device provided by the utility model because charge door of first ventilating opening apart from top has certain distance, It thus can ensure that there is larger scope in pyrolytic gasification area, not influence the reduction reaction in Volatile stage;
Decoupling combustion device provided by the utility model by changing the inclination angle of blower unit, can change pyrolytic gasification area with Shape, scope and first ventilating opening in semicoke area improve flow field control and the ability of balanced ventilation, increased to the flowing resistance of burner To the adaptability of fuel character and burning load, (adaptability enhancing is mainly manifested in by force:When the volatile matter content of fuel is different or When person's effective heat duty changes greatly, we need not redesign the new type of furnace, it is only necessary to adjust the position of the first ventilating opening Or first fire grate angle can meet require);
Decoupling combustion device provided by the utility model by controlling the air intake ratio of the second ventilating opening and the first ventilating opening, The air distribution in adjustable semicoke area and the influence to pyrolytic gasification area, so as to also can optimal control pyrolytic gasification area and semicoke area it is anti- Speed is answered, increase (by adjusting the air intake resistance of different ventilating openings, can adjust the resistance in different paths to the adaptability of coal Power, so as to change the ratio of air distribution, air distribution ratio changes combustion atmosphere and the burning that have impact on pyrolytic gasification area and semicoke area Speed, Coal rank is different in the air distribution of different combustion phases demands, and the raising of air distribution regulating power can increase to coal Adaptability).
Brief description of the drawings
Fig. 1 is the positive structure diagram for the decoupling combustion device that embodiment 1 provides.
Wherein:1, front wall;2, mid-board;3, rear wall with flues;4, charge door;5, the first fire grate;6, the first ventilating opening;7, second Fire grate;8, the second ventilating opening;9, burner;10, pyrolytic gasification area;11, semicoke area;The direction of arrow represents gas flowing in figure Direction.
Embodiment
Further illustrate the technical solution of the utility model below in conjunction with the accompanying drawings and by embodiment.
Embodiment 1
A kind of decoupling combustion device, its front view as shown in figure 1, the decoupling combustion device include front wall 1, mid-board 2, Wall with flues 3, facade wall (being used to connect front wall side, mid-board side and rear wall with flues side), back side wall are (another for connecting front wall afterwards One side, mid-board another side and rear wall with flues another side), blower unit and the second fire grate 7;
Between front wall 1 and rear wall with flues 3, facade wall is used to connect the side of front wall 1, the side of mid-board 2 mid-board 2 With the rear side of wall with flues 3, back side wall is used to connect the another side of front wall 1, the another side of mid-board 2 and the another side of rear wall with flues 3, and Facade wall is relative with the side of front wall 1, mid-board 2 and rear wall with flues 3 that back side wall connects, front wall 1, mid-board 2, rear wall with flues 3, just Face wall and back side wall form decoupling burning body of heater, and the space between front wall 1 and rear wall with flues 3 is used to place fuel;
Charge door 4, the first ventilating opening 6 and the second ventilating opening 8 are disposed with the front wall 1 from top to bottom;
The blower unit connects with the first ventilating opening 6, for introducing a gas into the space between front wall 1 and mid-board 2;
Second fire grate 7 is arranged on the bottom in space between front wall 1 and mid-board 2, highly positioned at the He of the first ventilating opening 6 Between second ventilating opening 8;
Burner 9 is formed between the bottom of mid-board 2 and the second fire grate 7;
The upper space in the space between front wall 1 and mid-board 2 of pyrolytic gasification area 10;The semicoke area 11 is pyrolysis The bottom of gasification zone 10, the second fire grate 7 top space;
The blower unit includes the first fire grate 5;The blower unit is connected with inclination-angle regulating device, and activity is set, institute It is 0-70 ° to state the inclination angle of blower unit and the angle of horizontal direction, such as 2 °, 3 °, 4 °, 5 °, 6 °, 10 °, 20 °, 30 °, 50 °, 60 ° Or 65 ° etc.;
The blower unit, which also can be replaced, sets porose airway tube on tube wall, to control the flow direction of gas.
Also settable chimney, the chimney connect with burner between wall with flues top and mid-board after described, for that will burn Caused gas is discharged or for exchanging heat.
It is as follows using the combustion method idiographic flow of the decoupling combustion device:
Solid fuel is added in the decoupling combustion device by charge door 4, is entered with the first ventilating opening 6 and the second ventilating opening 8 Combustion reaction occurs for the air entered, wherein, the overdraught amount of solid fuel is less than bottom, and solid fuel is in the decoupling burning Pass through pyrolytic gasification area 10 and semicoke area 11 in device successively, waste residue caused by burning falls discharge, burning production through the second fire grate 7 Raw flue gas is discharged through burner 9.
Comparative example 1
A kind of decoupling combustion device, in addition to the first fire grate 5 and the first ventilating opening 6 is not provided with, remaining with described in embodiment 1 Decoupling combustion device is identical.
Embodiment 2
The decoupling combustion device provided using embodiment 1 and comparative example 1 carries out combustion burning of coal, when inlet amount is identical, leads to Enter air amount it is identical when, the decoupling combustion device described in embodiment 1 has relative to the decoupling combustion device described in comparative example 1 Following advantage:
So that coal gas by pyrolysis and gasification is increased by the time in semicoke area, the average combustion intensity in semicoke area is reduced, so as to Make the ignition temperature peak value in the region reduce by 100 DEG C or so, be advantageous to strengthen the captured sulfur result of sulphur-fixing agent;Blower unit can be changed Inclination angle, so as to change the shape in pyrolytic gasification area and semicoke area, scope and the first ventilating opening to the flowing resistance of burner, So it can improve flow field control and the ability of balanced ventilation, strengthen and the adaptability of fuel character and burning load (is adapted to Property enhancing be mainly manifested in:When the volatile matter content of fuel is different or effective heat duty changes greatly, we need not weigh Newly design the new type of furnace, it is only necessary to adjust the position of the first ventilating opening or the angle can of the first fire grate meets to require);Separately Outside, its air intake ratio by controlling the second ventilating opening and the first ventilating opening, can adjust the air distribution in semicoke area and to pyrolytic gasification The influence in area, so as to also can optimal control pyrolytic gasification area and semicoke area reaction speed, increase the adaptability (optimization to coal The essence of reaction speed is the pyrolytic gasification speed of pyrolytic gasification area fuel and the burning velocity of semicoke area semicoke is matched, and is made Nitrogen can be reduced into as much as possible before burner is left by obtaining caused NOx in said process, while inflammable substance can In jet-burner after-flame as much as possible, so as to reduce pollutant emission, over-emitting black exhaust, does not improve thermal efficiency of stoves;Increase is to coal The implication of adaptability is similar to the adaptability of fuel form with above-mentioned enhancing:The volatile matter of Coal rank and the content of fixed carbon are not Together, therefore for the emission reduction synergistic effect being optimal, pyrolytic gasification area just should be accordingly controlled to make with semicoke area reaction speed Be mutually matched, and this is by controlling the air intake ratio of the second ventilating opening and the first ventilating opening to achieve that).
Applicant states, the foregoing is only specific embodiment of the present utility model, but protection model of the present utility model Enclose and be not limited thereto, person of ordinary skill in the field is it will be clearly understood that any belong to those skilled in the art and exist In the technical scope that the utility model discloses, the change or replacement that can readily occur in all fall within the scope of protection of the utility model Within the scope of disclosure.

Claims (6)

1. a kind of decoupling combustion device, it is characterised in that the decoupling combustion device includes front wall, mid-board, rear wall with flues, air inducing Device and the second fire grate;
The mid-board is between front wall and rear wall with flues;
Charge door, the first ventilating opening and the second ventilating opening are disposed with the front wall from top to bottom;
The blower unit connects with the first ventilating opening, for introducing a gas into the space between front wall and mid-board;
Second fire grate is arranged on the bottom in space between front wall and mid-board, is highly divulged information positioned at the first ventilating opening and second Between mouthful;
Burner is formed between mid-board bottom and the second fire grate;
The upper space in pyrolytic gasification area space between front wall and mid-board;Semicoke area is pyrolytic gasification area bottom, the second stove The space of the top of row.
2. decoupling combustion device according to claim 1, it is characterised in that the blower unit includes the first fire grate.
3. decoupling combustion device according to claim 1, it is characterised in that the blower unit includes airway tube, described Hole is provided with the tube wall of airway tube.
4. according to the decoupling combustion device described in one of claim 1-3, it is characterised in that the blower unit activity is set.
5. according to the decoupling combustion device described in one of claim 1-3, it is characterised in that the inclination angle of the blower unit and water Square to angle be 0-70 °.
6. according to the decoupling combustion device described in one of claim 1-3, it is characterised in that the blower unit and tilt adjustment Device connects.
CN201720771828.6U 2017-06-29 2017-06-29 A kind of decoupling combustion device Active CN206958896U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720771828.6U CN206958896U (en) 2017-06-29 2017-06-29 A kind of decoupling combustion device

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Application Number Priority Date Filing Date Title
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Publications (1)

Publication Number Publication Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109578977A (en) * 2018-11-23 2019-04-05 兖矿集团有限公司 A kind of environmentally friendly coal-burning boiler and its processing method of independent control pyrolytic gasification and coal-char combustion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109578977A (en) * 2018-11-23 2019-04-05 兖矿集团有限公司 A kind of environmentally friendly coal-burning boiler and its processing method of independent control pyrolytic gasification and coal-char combustion
CN109578977B (en) * 2018-11-23 2020-08-21 兖矿集团有限公司 Environment-friendly coal-fired boiler capable of independently controlling pyrolysis gasification and semicoke combustion and treatment method thereof

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