CN200943848Y - Primary and secondary burning furnace for reducing coal contaminant discharging - Google Patents
Primary and secondary burning furnace for reducing coal contaminant discharging Download PDFInfo
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- CN200943848Y CN200943848Y CNU200620119271XU CN200620119271U CN200943848Y CN 200943848 Y CN200943848 Y CN 200943848Y CN U200620119271X U CNU200620119271X U CN U200620119271XU CN 200620119271 U CN200620119271 U CN 200620119271U CN 200943848 Y CN200943848 Y CN 200943848Y
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Abstract
The utility model belongs to a raw coal burning technology and a burning equipment field, in particular relates to a coal primary and secondary clean combustion boiler decreasing the emission of boiler smoke black, carbon monoxide, polycyclic aromatics, and nitrogen oxides. The coal primary and secondary combustion boiler consists of two burning boilers with relatively independent and bilateral symmetry structures and a smoke flue between the two combustion boilers. A wall partition divides the upper section of the combustion boiler into a heat decomposition chamber and a reburning chamber, an upper connecting opening connected with the upper section of the smoke flue is arranged on the upper side wall of the reburning chamber; a burning chamber is arranged under the heat decomposition chamber and the reburning chamber, a boiler grate is arranged under the burning chamber, an ash slag chamber is arranged under the boiler grate, an ash-discharge door and a lower connecting opening connected with the lower section of the smoke flue are arranged on the two side walls of the ash slag chamber; an upper overturning baffle plate is arranged on the upper section of the smoke flue and positioned at the upper connecting opening of the left and right reburning chambers; a middle overturning baffle plate is arranged in the middle section of the smoke flue, a lower overturning baffle plate is arranged at the lower section of the smoke flue and positioned at the lower connecting opening of the left and right ash slag chamber.
Description
Technical field
The invention belongs to the combustion technology and the combustion apparatus field of raw coal, particularly a kind of boiler jet-black, carbon monoxide (CO), polycyclic aromatic hydrocarbons (PAH) (PAH) and nitrogen oxide (NO of reducing
x) discharging coal primary and secondary clean combustion furnace.
Background technology
Coal burning is the main cause that causes Chinese atmosphere pollution.A large amount of small scall coal-fired boiler and the domestic burners of China all adopts traditional combustion method at present, and efficiency of combustion is low, and is seriously polluted.Develop middle-size and small-size clean burning technical equipment, become the current minimizing of China and polluted, the focus and the difficult point of protection environment.
Conventional boiler is simple in structure, and fire coal directly enters the burner hearth burning, and air feed and coal combustion product co-flow are directly discharged the burner hearth of high temperature.Because flue gas is few and coal combustion product and excess air mixing inequality in the high-temperature region time of staying, causes coal completing combustion not produce a large amount of CO, jet-black and PAH on the one hand, on the other hand the NO of burning generation
xFail to reduce, efficient is lower simultaneously to cause environmental pollution.If improve excess air coefficient or fire box temperature, though make CO, jet-black and PAH discharging reduce NO
xDischarging but increase thereupon, and flue gas loss increases; Otherwise, if reduce excess air coefficient or fire box temperature, though make NO
xDischarging reduce, but the discharging of CO, jet-black and PAH increases thereupon.
Patent 95102081.1 discloses a kind of low NO
xSmokeless coal-burning method and combustion furnace, coal at first utilize self calory burning pyrolytic gasification in vaporizer, coke remaining after the coal gasification burns in the combustion chamber, owing to mainly carry out the pyrolysis of coal at vaporizer, pyrolysis rate is slower, and it suppresses NO
xDischarging is mainly carried out in the coke district, but because a big chunk pyrolysis gas burns PAH, jet-black and NO that this partial thermal decomposition gas firing is produced above coke layer
xHave no chance to contact, so coke layer is to this part PAH, jet-black and NO with coke layer
xNot elimination effect.In addition, can destroy the coke layer that has formed when the lime-ash on this stove fire grate is removed, the effect that makes this coke layer eliminate jet-black and NOx weakens, and the coal furnace over-emitting black exhaust occurs, CO, PAH and NO
xPhenomenon is increased in discharging.
Summary of the invention
The objective of the invention is problem, a kind of coal child-mother clean that reduces the discharging of pollution that caused by coal burning thing is provided at above combustion furnace existence.
The coal child-mother clean of reduction pollution that caused by coal burning thing of the present invention discharging is relatively independent by two, and the coal furnace and the flue between this two coal furnaces that are the left-right symmetry structure constitute, its structure as shown in Figure 1, this coal child-mother clean comprises: firing door, partition wall, pyrolysis chamber, burning chamber, combustion chamber, cinder chamber, twice aeration door, last connected entrance, chimney, air-introduced machine, on the baffle plate that overturns, skimming door, fire grate, shoot door, flue, following connected entrance, middle upset baffle plate, following upset baffle plate.
One coal furnace is made of pyrolysis chamber, burning chamber, combustion chamber and cinder chamber; One partition wall is arranged at the top in coal furnace, it is a pyrolysis chamber and a burning chamber that the top of coal furnace is separated, top in the pyrolysis chamber has firing door, has the twice aeration door in the bottom of burning chamber, the upper side wall of burning chamber be provided be communicated with flue top on connected entrance; The bottom of pyrolysis chamber and burning chamber is a combustion chamber, and the fire grate that two ends are connected with the coal furnace two side respectively is installed below the combustion chamber, and the sidewall of combustion chamber above fire grate has skimming door; The fire grate below is a cinder chamber, the following connected entrance that the cinder chamber two side is respectively equipped with shoot door and is communicated with the flue bottom;
One flue has between two coal furnaces of said structure, and two coal furnace symmetries are installed; Top at flue is equipped with air-introduced machine, and the outlet of air-introduced machine is communicated with chimney; The top of flue the inside be equipped with have rotating shaft on the baffle plate that overturns, and be positioned at the last connected entrance place of left and right sides burning chamber; Middle part in the flue the inside is equipped with the middle upset baffle plate that has rotating shaft, in the bottom of flue the inside the following upset baffle plate that has rotating shaft is installed, and is positioned at the following connected entrance place of left and right sides cinder chamber.
Described going up between upset baffle plate and the following upset baffle plate can further be equipped with the connecting rod that makes two upset baffle plate interlocks.
Described fire grate tilts, and the fire grate angle of inclination is 5～40 degree, low side be positioned at following connected entrance that cinder chamber is communicated with the flue bottom above, below the high-end skimming door that is positioned at sidewall of combustion chamber.
Described coal furnace is to be made of water-cooling wall.
Technical characterstic of the present invention is: the flue gas of a coal furnace generation is discharged through behind the other coal furnace, and the NO in this process in the flue gas is reduced to N by coke
2, CO is oxidized to CO
2, jet-black and PAH are burnt.It is the same but volume can be small one and large one that two coal furnaces of coal child-mother clean of the present invention can make structure, can further reduce jet-black in the flue gas, CO, PAH and NO like this in running
xDischarge capacity.
Description of drawings
Fig. 1. the structural representation of the coal child-mother clean of reduction pollution that caused by coal burning thing discharging of the present invention.
Reference numeral
1,14. firing door, 2,13. partition walls, 3,16. combustion chambers
4,11. burning chamber, 5,12. twice aeration doors 6 are 10. gone up connected entrance
7. baffle plate overturns on chimney 8. air-introduced machines 9.
15,30. pyrolysis chambers, 17,29. skimming doors, 18,28. fire grates
19,26. shoot doors, 20,27. cinder chamber, 21. flues
24. times upsets of upset baffle plate baffle plate in 22,25. times connected entrances 23.
31. water-cooling wall
The specific embodiment
See also Fig. 1.One coal child-mother clean that reduces the discharging of pollution that caused by coal burning thing is relatively independent by two, and the coal furnace and the flue between this two coal furnaces that are the left-right symmetry structure constitute.
Wherein a coal furnace that is made of water-cooling wall 31 is made of pyrolysis chamber 30, burning chamber 4, combustion chamber 3 and cinder chamber 27; One partition wall 2 is arranged at the top in coal furnace, it is a pyrolysis chamber 30 and a burning chamber 4 that the top of coal furnace is separated, 30 top has firing door 1 in the pyrolysis chamber, has twice aeration door 5 in the bottom of burning chamber 4, the upper side wall of burning chamber 4 be provided be communicated with flue top on connected entrance 6; The bottom of pyrolysis chamber 30 and burning chamber 4 is a combustion chamber 3, and it is the water-cooled grate or the casting furnace grates 28 of 15 degree that the angle of inclination that two ends are connected with the coal furnace two side respectively is installed below combustion chamber 3; Combustion chamber 3 sidewalls above water-cooled grate or casting furnace grate 28 have skimming door 29; Water-cooled grate or casting furnace grate 28 belows are a cinder chamber 27, the following connected entrance 25 that cinder chamber 27 two sides are respectively equipped with shoot door 26 and are communicated with the flue bottom; Wherein the low side of water-cooled grate or casting furnace grate 28 be positioned at following connected entrance 25 that cinder chamber 27 is communicated with the flue bottom above, below the high-end skimming door 29 that is positioned at combustion chamber 4 sidewalls, the pipeline of forming water-cooled grate is connected with water-cooling wall 31, in water-cooling wall 31 recirculated water is arranged.
Another is made of pyrolysis chamber 15, burning chamber 11, combustion chamber 16 and cinder chamber 20 coal furnace that water-cooling wall 31 constitutes; One partition wall 13 is arranged at the top in coal furnace, it is a pyrolysis chamber 15 and a burning chamber 11 that the top of coal furnace is separated, 15 top has firing door 14 in the pyrolysis chamber, have twice aeration door 12 in the bottom of burning chamber 11, the upper side wall of burning chamber 11 be provided be communicated with flue top on connected entrance 10; The bottom of pyrolysis chamber 15 and burning chamber 11 is a combustion chamber 16, and it is the water-cooled grate or the casting furnace grates 18 of 15 degree that the angle of inclination that two ends are connected with the coal furnace two side respectively is installed below combustion chamber 16; Combustion chamber 16 sidewalls above water-cooled grate or casting furnace grate 18 have skimming door 17; Water-cooled grate or casting furnace grate 18 belows are a cinder chamber 20, the following connected entrance 22 that cinder chamber 20 two sides are respectively equipped with shoot door 19 and are communicated with the flue bottom; Wherein the low side of water-cooled grate or casting furnace grate 18 be positioned at following connected entrance 22 that cinder chamber 20 is communicated with the flue bottom above, below the high-end skimming door 17 that is positioned at combustion chamber 16 sidewalls, the pipeline of forming water-cooled grate is connected with water-cooling wall 31, in water-cooling wall 31 recirculated water is arranged.
One flue 21 is between two coal furnaces of said structure, and two coal furnace symmetries are installed; On the top of flue 21 air-introduced machine 8 is installed, the outlet of air-introduced machine is communicated with chimney 7; Be provided with upset baffle plate 9 on the top of flue the inside, and be positioned at the last connected entrance place of left and right sides burning chamber; Upset baffle plate 23 in the middle part of flue the inside is provided with is provided with upset baffle plate 24 down in the bottom of flue the inside, and is positioned at the following connected entrance place of left and right sides cinder chamber.
When carrying out the coal clean burning, above-mentioned coal child-mother clean carries out following steps:
(1). at first the middle upset baffle plate 23 with the middle part of the flue between two coal furnaces turn to horizontal level, and the flue bottom can not be communicated with top; Upset baffle plate 9 on the flue is turn to the upright position, the burning chamber 4 and the burning chamber 11 that are positioned at the flue both sides are communicated with flue 21; Close the skimming door 17 and the skimming door 29 of flue two side combusion chambers, open the twice aeration door 5 and the twice aeration door 12 of flue both sides burning chamber, open the shoot door 19 and the shoot door 26 of flue both sides cinder chamber simultaneously;
(2). the firing door 1 by the pyrolysis chamber adds a certain amount of coal in pyrolysis chamber 30 and combustion chamber 3; Add a certain amount of coal by firing door 14 in pyrolysis chamber 15 and combustion chamber 16, open air-introduced machine 8, light coal respectively water-cooled grate from the coal furnace of flue both sides or casting furnace grate bottom then;
(3). after the coal smooth combustion, the coal in two combustion chambers 3 and combustion chamber 16 forms coke layer respectively, the middle upset baffle plate 23 at flue 21 middle parts is turn to the upright position flue is communicated with up and down;
(4). adjust the baffle plate 9 that overturns of going up on flue top, the top of upset baffle plate is connected with the chimney opening upper edge that the last connected entrance 6 of the burning chamber 4 of coal furnace connects, and the lower end is connected with the chimney opening lower edge that the last connected entrance 10 of the burning chamber 11 of another coal furnace connects simultaneously; Adjust the following upset baffle plate 24 of flue bottom simultaneously, make down upset baffle plate 24 parallel with last upset baffle plate 9, overturn the down top of baffle plate is connected with the chimney opening upper edge that the following connected entrance 25 of cinder chamber 27 connects, lower end with the baffle plate 24 that overturns at present is connected with the chimney opening lower edge that the following connected entrance 22 of the cinder chamber 20 of another coal furnace connects, so that the cinder chamber 20 of the burning chamber 4 of a coal furnace and another coal furnace is communicated with (on overturn baffle plate 9 and the following solid line position of baffle plate 24 as the baffle plate that overturns among Fig. 1 that overturn) with flue;
(5). the cinder chamber 20 of the burning chamber of the coal furnace described in the step (4) 4 and another coal furnace is with after flue 21 is communicated with; Flue gas in its burning chamber 4 can enter flue with the last connected entrance 6 that flue 21 tops are connected by burning chamber 4, and enter the cinder chamber 20 of another coal furnace by the following connected entrance 22 that the cinder chamber 20 flue bottom and another coal furnace is connected, this part flue gas enters combustion chamber 16 by water-cooled grate in this coal furnace or casting furnace grate 18 then, the coke layer that last this part flue gas passes this combustion chamber enters this burning chamber 11, and enter flue by the last connected entrance 10 that is connected with flue, enter chimney 7 by air-introduced machine 8, discharge by chimney 7 at last; Jet-black, CO and PAH in the burning chamber 4 in the flue gas be oxidized burning when the high-temperature coke layer of this combustion chamber 16 of process, and the NO in this part flue gas is reduced to N by coke layer simultaneously
2, reduced jet-black, CO, PAH and NO by such process
xDischarging;
(6). in the time need clearing up to the lime-ash that the burning of the coke in the combustion chamber 16 described in the step (5) is produced, adjust upward upset baffle plate 9 and following upset baffle plate 24 in the flue, the chimney opening upper edge that connected entrance 10 connects in the burning chamber 11 of top and this coal furnace of upset baffle plate 9 is connected, and the while lower end is connected with the chimney opening lower edge that the last connected entrance 6 of the burning chamber 4 of another coal furnace connects; The chimney opening upper edge that the following connected entrance 22 of the top of baffle plate 24 cinder chamber 20 adjacent with the combustion chamber 16 described in the step (5) of overturning down connects is connected, and the lower end is connected (on overturn the baffle plate 9 and the dotted line position of baffle plate 24 as the baffle plate that overturns among Fig. 1 that overturn down) with the chimney opening lower edge that the following connected entrance 25 of another cinder chamber 27 connects simultaneously; So that need carry out the burning chamber 11 of coal furnace of lime-ash cleaning and the cinder chamber 27 of another coal furnace is communicated with flue; At this moment, the flue gas of burning chamber 11 that need carry out the coal furnace of lime-ash cleaning enters the cinder chamber 27 of another coal furnace by flue, enters burning chamber 4 then, and enters flue by the last connected entrance 6 that is connected with flue, enter chimney 7 by air-introduced machine 8, discharge by chimney 7 at last; Same in this process in the burning chamber 11 in the flue gas coke layer in the burned chamber 3 of NO be reduced to N
2, oxidized decomposition during coke layer in crossing combustion chamber 3 of the jet-black in the flue gas, CO and PAH has reduced jet-black in the flue gas, CO, PAH and NO by such process
xDischarging, can effectively reduce simultaneously owing to carry out the destruction of coke layer in the combustion chamber of coal furnace of lime-ash cleaning and cause jet-black in the flue gas, CO, PAH and NO
xThe increase of discharging; Make that fume emission is in a more stable state all the time in the boiler scarfing cinder process;
(7). in the time need carrying out scarfing cinder, adjust the position of going up upset baffle plate and following upset baffle plate in the flue, make them get back to the residing position of step (4) the coke layer in the burning chamber 4; Can avoid increase like this owing to jet-black, CO, PAH and NOx discharging in the destroyed flue gas that causes of the coke layer in this combustion chamber; Can make boiler in the scarfing cinder process, discharge the more stable state that is in all the time in the flue gas;
(8). the lime-ash that produces in the combustion process enters respectively in the cinder chamber of two coal furnaces, after lime-ash is stacked into to a certain degree, is removed by the shoot door of the cinder chamber that is positioned at furnace bottom; Can be in combustion process according to the switch size of fire coal requirement and boiler load requirement adjustment shoot door, control boiler primary air flow by adjusting the twice aeration door, is controlled secondary air flow.
Claims (5)
1. coal child-mother clean that reduces pollution that caused by coal burning thing discharging, this coal child-mother clean is relatively independent by two, and the coal furnace and the flue between this two coal furnaces that are the left-right symmetry structure constitute, and comprising: firing door, partition wall, pyrolysis chamber, burning chamber, combustion chamber, cinder chamber, twice aeration door, last connected entrance, chimney, air-introduced machine, on the baffle plate that overturns, skimming door, fire grate, shoot door, flue, following connected entrance, middle upset baffle plate, following upset baffle plate; It is characterized in that:
One coal furnace is made of pyrolysis chamber, burning chamber, combustion chamber and cinder chamber; One partition wall is arranged at the top in coal furnace, it is a pyrolysis chamber and a burning chamber that the top of coal furnace is separated, top in the pyrolysis chamber has firing door, has the twice aeration door in the bottom of burning chamber, the upper side wall of burning chamber be provided be communicated with flue top on connected entrance; The bottom of pyrolysis chamber and burning chamber is a combustion chamber, and the fire grate that two ends are connected with the coal furnace two side respectively is installed below the combustion chamber, and the sidewall of combustion chamber above fire grate has skimming door; The fire grate below is a cinder chamber, the following connected entrance that the cinder chamber two side is respectively equipped with shoot door and is communicated with the flue bottom;
One flue has between two coal furnaces of said structure, and two coal furnace symmetries are installed; Top at flue is equipped with air-introduced machine, and the outlet of air-introduced machine is communicated with chimney; The top of flue the inside be equipped with have rotating shaft on the baffle plate that overturns, and be positioned at the last connected entrance place of left and right sides burning chamber; Middle part in the flue the inside is equipped with the middle upset baffle plate that has rotating shaft, in the bottom of flue the inside the following upset baffle plate that has rotating shaft is installed, and is positioned at the following connected entrance place of left and right sides cinder chamber.
2. coal child-mother clean according to claim 1 is characterized in that: described fire grate tilts, low side be positioned at following connected entrance that cinder chamber is communicated with the flue bottom above, below the high-end skimming door that is positioned at sidewall of combustion chamber.
3. coal child-mother clean according to claim 2 is characterized in that: described fire grate angle of inclination is 5～40 degree.
4. coal child-mother clean according to claim 1 is characterized in that: described coal furnace is to be made of water-cooling wall.
5. coal child-mother clean according to claim 1 is characterized in that: described going up between upset baffle plate and the following upset baffle plate is equipped with the connecting rod that makes two upset baffle plate interlocks.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620119271XU CN200943848Y (en) | 2006-08-10 | 2006-08-10 | Primary and secondary burning furnace for reducing coal contaminant discharging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620119271XU CN200943848Y (en) | 2006-08-10 | 2006-08-10 | Primary and secondary burning furnace for reducing coal contaminant discharging |
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| Publication Number | Publication Date |
|---|---|
| CN200943848Y true CN200943848Y (en) | 2007-09-05 |
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ID=38718483
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620119271XU Expired - Lifetime CN200943848Y (en) | 2006-08-10 | 2006-08-10 | Primary and secondary burning furnace for reducing coal contaminant discharging |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498056C (en) * | 2006-07-28 | 2009-06-10 | 中国科学院过程工程研究所 | Coal primary and secondary combustion furnace capable of reducing fire coal pollutant discharging and coal burning method thereof |
| CN105066106A (en) * | 2015-07-23 | 2015-11-18 | 榆林学院 | Dual-hearth combustion furnace and fuel combustion method |
| CN105180216A (en) * | 2015-09-25 | 2015-12-23 | 天津九州中盛暖通设备制造有限公司 | Coal-fired furnace |
| CN105258328A (en) * | 2015-09-25 | 2016-01-20 | 天津百事恒兴暖通设备制造有限公司 | Coal-fired environment-friendly furnace |
-
2006
- 2006-08-10 CN CNU200620119271XU patent/CN200943848Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100498056C (en) * | 2006-07-28 | 2009-06-10 | 中国科学院过程工程研究所 | Coal primary and secondary combustion furnace capable of reducing fire coal pollutant discharging and coal burning method thereof |
| CN105066106A (en) * | 2015-07-23 | 2015-11-18 | 榆林学院 | Dual-hearth combustion furnace and fuel combustion method |
| CN105180216A (en) * | 2015-09-25 | 2015-12-23 | 天津九州中盛暖通设备制造有限公司 | Coal-fired furnace |
| CN105258328A (en) * | 2015-09-25 | 2016-01-20 | 天津百事恒兴暖通设备制造有限公司 | Coal-fired environment-friendly furnace |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20060810 |
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| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20060810 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |