CN1789807A - Biomass combustion device with low NOx emission and combustion method thereof - Google Patents
Biomass combustion device with low NOx emission and combustion method thereof Download PDFInfo
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Abstract
This invention relates to biomass low NOx burst device and its method, wherein, the device comprise the following parts: stand burst furnace with smoke channel exit with its inside isolation board as bottom heat chamber and burst chamber and connection hole; the material bin on the heat chamber; inclined furnace row and rotation reside device down the burst chamber; reducing zone and burst zone inside the burst chamber located with once, secondary and third wind-in mouth. The method combines the biomass characteristics of fully burst and coke burst to form different burst environment to reduce black smoke.
Description
Invention field
The present invention relates to a kind of biomass combustion device and combustion method, be particularly related to a kind of jet-black, nitrogen oxide (NOx) and carbon monoxide (CO) that can effectively reduce the biomass combustion discharging, improve the efficient burning device and the combustion method of biomass combustion utilization ratio.
Background technology
Poor day by day along with fossil energy receives much concern as the development and use of the biomass energy of the fourth-largest energy.China's biomass energy is abundant, agricultural wastes density wherein is little, the stacking volume is big, open burning is seriously polluted, potential safety hazard is big, for this reason, people have developed multiple biomass combustion and have utilized method, but because the living beings volatile matter is many, the coke burning is asynchronous with volatile combustion, the after-flame degree is poor, the over-emitting black exhaust situation is serious, thereby has restricted the promotion and application of biomass fuel burning technology, and living beings contain more nitrogen element, can generate a large amount of pollutant NOx in the time of burning, so need the method for a kind of low NOx efficient burning living beings of exploitation.
Publication number is that CN 95 102081.1 patents of invention disclose a kind of low NOx smokeless coal-burning method and combustion furnace, and coal at first utilizes self calory burning hypoxemia pyrolytic gasification in vaporizer, and semicoke remaining after the coal gasification burns in the combustion chamber.When the pyrolysis gas that vaporizer produces passed through the coal-char combustion layer of vaporizer base burning mouth, nitrogenous gas such as NOx were reduced to N by semicoke
2Because the jet-black that imperfect combustion produces is when the semicoke layer at process port place, the part jet-black is adsorbed to the surface of semicoke, is burnt along with the burning of semicoke, reduces the discharging of jet-black and CO.
Summary of the invention
The low NOx combustion apparatus that the purpose of this invention is to provide a kind of living beings, this device can reduce the discharging of pollutants such as jet-black and NOx when improving biomass combustion efficient, realize that the high-efficiency environment friendly burning of living beings utilizes.
Another object of the present invention provides a kind of low NOx combustion apparatus method of living beings.
The object of the present invention is achieved like this:
The low NOx efficient burning device of living beings provided by the invention comprises:
One vertical shaft furnace 100, the body of heater top is provided with flue outlet 8, and every being divided into pyrolysis chamber 2 and the combustion chamber 4 that the bottom communicates, dividing plate 14 bottoms have the connected entrance 9 that is communicated with pyrolysis chamber 2 and combustion chamber 4 to the body of heater inner chamber by a dividing plate 14; Top, described pyrolysis chamber is equipped with hopper 1; 4 bottoms are provided with inclined grate and rotation deslagging device 12 successively in the combustion chamber; The combustion zone that is positioned in the combustion chamber 4 under the pyrolysis chamber 2 is divided into reducing zone 10 and burning-out zone 7, described reducing zone 10 is positioned on the inclined grate, burning-out zone 7 under reducing zone 10, with inclined grate, reducing zone 10 and burning-out zone 7 corresponding furnace walls on be respectively equipped with wind inlet 20, secondary wind inlet 5 and a tertiary air import 3.
The cross section of described vertical burning (100) is circular and square.Described dividing plate (14) is tubular dividing plate or dull and stereotyped dividing plate.Described rotation deslagging device (12) is rotary valve or helix transporting device.
Described pyrolysis chamber 2 is positioned at vertical burning 100 centers, and described inclined grate is the cone-shaped grates 6 of base sealing, and its cone angle is 90-120 °.Described inclined grate also can be two layers of cone-shaped grates, and promptly cone-shaped grates 6 is a upper grate, and its below is provided with a back taper lower floor fire grate, and cone angle is 90-120 °.
Described pyrolysis chamber 2 is positioned at a side of vertical shaft furnace 100, described inclined grate is two-layer inclined grate, be that inclined grate 16 is the upper strata inclined grate, its below is provided with and 16 one-tenths clover leaf lower floors of inclined grate inclined grate 17, and the angle of lower floor's inclined grate 17 and horizontal plane is 30-60 °.
Described vertical shaft furnace 100 is a circular cross-section, and described pyrolysis chamber 2 is positioned at the center of vertical shaft furnace 100, and described secondary wind that is blown into by secondary air mouth 5 and three air inlets 3 and tertiary air 2 are tangentially sent into along the pyrolysis chamber.
Described vertical shaft furnace 100 is the square-section, described pyrolysis chamber 2 is positioned at a side of vertical shaft furnace 100, and vertical with the furnace wall and angled smoke deflector 15 is installed at the described secondary wind inlet 5 on 4 furnace walls, described combustion chamber and the upper-lower position place of tertiary air import 3 respectively.
The low NOx efficient burning method of living beings provided by the invention, its combustion step is as follows:
1) biomass fuel is sent into pyrolysis chamber 2 from the hopper 1 of upper of furnace body, utilizes biomass combustion produces on the inclined grate of combustion chamber 4 heats and 2 bottoms, pyrolysis chamber heat to make that living beings heat up, pyrolysis, separates out volatile matter, generates biomass coke;
2) the effect next part of the volatile matter of Sheng Chenging negative pressure in stove enters combustion chamber 4 and secondary wind and the tertiary air mixed combustion sent into from the connected entrance 9 on the dividing plate 14, extenuate volatile matter and coke and rob the contradiction of oxygen burning mutually, can reduce the high phenomenon of over-emitting black exhaust and CO discharging, improve efficiency of combustion;
3) biomass coke of another part volatile matter and generation moves up into reducing zone 10 under the effect lower edge inclined grate of gravity and rotation deslagging device 12, with a wind mixed combustion of sending into, because the part jet-black that produces when volatile matter and coke mixed combustion is adsorbed to coke surface when passing scorching hot coke layer, burnt along with the burning of coke, can be reduced the jet-black growing amount; 10 burning is an anoxycausis in the reducing zone, and the reducing atmosphere of formation can reduce the growing amount of NOx in the burning, and the NOx of burning generation can be reduced to N when passing scorching hot coke layer in addition
2, also can reduce the discharge capacity of NOx in the biomass fuel combustion process;
4) under the effect of gravity and rotation deslagging device 12, scorching hot lime-ash moves along inclined grate, enters burning-out zone 7 by reducing zone 10, with the after-flame wind mixed combustion of sending into burning-out zone 7, further after-flame reduces ash content carbon, and the lime-ash of generation is discharged to outside the stove under rotation deslagging device 12 drives.
In the course of the work, biomass fuel can rely on self gravitation to flow on greater than 30 ° inclined grate in angle, form moving bed, behind the lime-ash of rotation deslagging device discharge section after-flame, the coke that burns on the fire grate will flow automatically and replenish, and the part of fuel of pyrolysis chamber can flow on the fire grate and further to replenish, and the fuel in the hopper also enters the pyrolysis chamber thereupon, makes the continuous motion of stove endogenous substance fuel.Feed in the whole stove, the rotary speed that can utilize control to rotate deslagging device of burning and slag tap are regulated, and be simple to operate, convenient and easy.
The present invention realizes that the theoretical foundation of the low NOx efficient burning of living beings is:
Utilize the living beings volatile matter to separate out the characteristics that obviously are divided into two stages with the coke burning, form different combustion atmospheres in stove inner tissue, the burning of volatile combustion and coke separated carry out, corresponding air capacity is provided respectively, and it is rapid to reduce volatile combustion, needs the burning of a large amount of air and coke during the burning slowly, air output is the contradiction between the Da Yi increase fly ash content too, it is many to solve the uneven jet-black that causes of air-supply, and the problem of after-flame difference realizes efficient burning; Meanwhile,, utilize reduction inhibition, the reducing NOx of anoxycausis and scorching hot coke, realize the low NOx drainage of biomass combustion at the stoker surface combustion atmosphere different with combustion chamber inner tissue.
The low NOx combustion apparatus of living beings provided by the invention and combustion method, its major advantage is:
(1) utilize gravity that biomass fuel is moved having on the inclined grate of certain angle continuously, form moving bed, the feed in the whole stove, burn and slag tap and can utilize the rotary speed of control rotation deslagging device to regulate, simple to operate, convenient and easy;
(2) pyrolysis of living beings separates and carries out with burning, can avoid the contradiction between the burning of volatile combustion and coke, reduces the phenomenon of over-emitting black exhaust, the raising efficiency of combustion;
(3) reduction of anoxycausis in the reducing zone and scorching hot coke can reduce the growing amount of NOx in the combustion process;
(4) classification vertically of upper furnace burning room air is sent into, and further reduces NOx and generates.
Description of drawings:
Accompanying drawing 1 is the structural representation of the embodiment of the invention 1;
Accompanying drawing 2 is the tangentially schematic diagram of air-supply of accompanying drawing 1;
Accompanying drawing 3 is the structural representation of the embodiment of the invention 2;
The specific embodiment
The invention will be further described to reach embodiment in conjunction with the accompanying drawings.
Embodiment 1:
Accompanying drawing 1 is the structural representation of embodiment 1.
The combustion furnace 100 of embodiment 1 is a upright cylinder, and tubular pyrolysis chamber 2 is positioned at the burner hearth middle part, and the bottom is that back taper fire grate 11 is connected with rotary valve type deslagging device 12.In the combustion process, the charging of biomass fuel, slagging-off and burning velocity are by rotary valve type deslagging device 12 controls of lower furnace.Biomass fuel enters the pyrolysis chamber 2 that is positioned at the burner hearth center from the hopper 1 of upper furnace, volatile matter is separated out in heating rapidly under the effect of furnace heat, a part of volatile matter of separating out enters combustion chamber 4 internal combustion by connected entrance 9, and the coke of another part volatile matter after with fuel thermal decomposition is that 90-120 ° cone-shaped grates 6 enters reducing zone 10 burnings along cone angle.In the reducing zone, after contacting, the wind that coke and volatile matter and fire grate below are sent into carries out anoxycausis, formation can suppress the reducing atmosphere that NOx generates, in addition, because scorching hot coke has strong reduction to NOx, the NOx that burning generates is reduced when entering the combustion chamber by scorching hot coke layer, has further reduced the growing amount of NOx; At burning-out zone 7, unburnt coke mixes abundant after-flame with after-flame wind, thereby has reduced ash content carbon, improves the after-flame degree.The lime-ash of after-flame is discharged burner hearth by rotary valve type deslagging device 12.In upper furnace combustion chamber 4, for the tangential firing mode has been adopted in overheavy firing, combustion air (two, tertiary air) 13 is tangentially sent into from four direction along imaginary circle, as shown in Figure 2.From two, the mixed combustions around 2 of tertiary air spout 5,3 air that sprays into burner hearth and the volatile matter that enters combustion chamber 4, flue gas in the tubular pyrolysis chamber, forming spiralling air-flow can the time of staying of prolong smoke in combustion chamber 4, reduce the jet-black discharging, improve efficiency of combustion.In addition, secondary wind, tertiary air layering are sent into to make and are realized fractional combustion in the combustion chamber vertically, further reduce the NOx growing amount.
Embodiment 2:
Accompanying drawing 3 is structural representations of embodiment 2.
The section of burner hearth of embodiment 2 is a rectangle, utilizes dividing plate 14 that upper furnace is divided into pyrolysis chamber 2 and combustion chamber 4.Two-layer inclined grate arranges that as shown in Figure 3 the charging of biomass fuel, slagging-off and burning velocity are by auger conveyor 12 controls of lower furnace.Biomass fuel enters pyrolysis chamber 2 from the hopper 1 of upper furnace, volatile matter is separated out in heating rapidly under the effect of furnace heat, a part of volatile matter of separating out enters combustion chamber 4 internal combustion by connected entrance 9, and the coke of another part volatile matter after with fuel thermal decomposition enters reducing zone 10 burnings along upper strata inclined grate 16.In the reducing zone, after contacting, the wind that coke and volatile matter and fire grate below are sent into carries out anoxycausis, suppressing NOx generates, in addition, because scorching hot coke has strong reduction to NOx, the NOx that burning generates is reduced when entering combustion chamber 4 by scorching hot coke layer, has further reduced the growing amount of NOx.At burning-out zone 7, unburnt coke mixes abundant after-flame with after-flame wind, reduces ash content carbon, improves the after-flame degree, and the lime-ash of after-flame is discharged burner hearth under the effect of auger conveyor.In upper furnace combustion chamber 4, two, tertiary air 5,3 adopts layerings to send into, and makes and realizes fractional combustion in the combustion chamber 4 vertically, further reduces the NOx growing amount.In order to strengthen combustion intensity, be provided with smoke deflector 15 in the combustion chamber 4, can strengthen the mixing intensity between flue gas, volatile matter and the air on the one hand, can also increase flow of flue gas stroke in the combustion chamber on the other hand, prolong the time of staying of imperfect combustion composition in stove, reduce jet-black discharging degree, improve efficiency of combustion;
The inclined grate of present embodiment is two-layer inclined grate, be that inclined grate 16 is the upper strata inclined grate, its below is provided with and 16 one-tenths clover leaf lower floors of inclined grate inclined grate 17, and the angle of upper strata inclined grate 16 and lower floor's inclined grate 17 and horizontal plane all can be 30-60 °.
The present invention utilizes living beings (particularly agricultural wastes) to act as a fuel, low price, the lime-ash that burning generates can be used as fertilizer application again, turn waste into wealth, has bigger economic benefit, and adopt this technology also to solve the problem of environmental pollution that the living beings open burning brings, have remarkable social benefit.
Claims (11)
1, a kind of low NOx of living beings is imitated burner, it is characterized in that, comprising:
One vertical shaft furnace (100), the body of heater top is provided with flue outlet (8), every being divided into pyrolysis chamber (2) and combustion chamber (4) that the bottom communicates, dividing plate (14) bottom has the connected entrance (9) that is communicated with pyrolysis chamber (2) and combustion chamber (4) to the body of heater inner chamber by a dividing plate (14); Top, described pyrolysis chamber is equipped with hopper (1); (4) bottom is provided with inclined grate and rotation deslagging device (12) successively in the combustion chamber; The combustion zone that is positioned in the combustion chamber (4) under the pyrolysis chamber (2) is divided into reducing zone (10) and burning-out zone (7), described reducing zone (10) is positioned on the inclined grate, burning-out zone (7) under reducing zone (10), with inclined grate, reducing zone (10) and the corresponding furnace wall of burning-out zone (7) on be respectively equipped with a wind inlet (20), secondary wind inlet (5) and tertiary air import (3).
By the low NOx combustion apparatus of the described living beings of claim 1, it is characterized in that 2, the cross section of described vertical burning (100) is circular and square.
3, by the low NOx combustion apparatus of the described living beings of claim 1, it is characterized in that described dividing plate (14) is tubular dividing plate or dull and stereotyped dividing plate.
4, by the low NOx combustion apparatus of the described living beings of claim 1, it is characterized in that described rotation deslagging device (12) is rotary valve or auger conveyor.
5, by the low NOx combustion apparatus of claim 1 or 2 described living beings, it is characterized in that described pyrolysis chamber (2) are positioned at vertical burning (100) center, described inclined grate is the cone-shaped grates (6) of base sealing, and its cone angle is 90-120 °.
6, by the low NOx combustion apparatus of the described living beings of claim 5, it is characterized in that described inclined grate is two layers of cone-shaped grates, promptly cone-shaped grates (6) position upper grate is provided with a back taper lower floor fire grate below it, and cone angle is 90-120 °.
7, press the low NOx combustion apparatus of claim 1 or 2 described living beings, it is characterized in that, described pyrolysis chamber (2) is positioned at a side of vertical burning (100), described inclined grate is an inclined grate horizontal by 30-60 ° of angle (16), and the described secondary wind inlet (5) on the furnace wall, described combustion chamber (4) is installed vertical with the furnace wall and angled smoke deflector (15) respectively with the upper-lower position place of tertiary air import (3).
8, press the low NOx combustion apparatus of the described living beings of claim 7, it is characterized in that, described inclined grate is two-layer inclined grate, be that inclined grate (16) is the upper strata inclined grate, its below is provided with an inclined grate (16) and becomes clover leaf lower floor inclined grate (17), and lower floor's inclined grate (17) is 30-60 ° with the angle of horizontal plane.
9, a kind of low NOx combustion method that uses the living beings of the described burner of claim 1, it is characterized in that, living beings are burnt in low NOx efficient burning device, described burner comprises: a vertical shaft furnace (100), the body of heater top is provided with flue outlet (8), every being divided into pyrolysis chamber (2) and combustion chamber (4) that the bottom communicates, dividing plate (14) bottom has the connected entrance (9) that is communicated with pyrolysis chamber (2) and combustion chamber (4) to the body of heater inner chamber by a dividing plate (14); Top, described pyrolysis chamber is equipped with hopper (1); (4) bottom is provided with inclined grate and rotation deslagging device (12) successively in the combustion chamber; The combustion zone that is positioned in the combustion chamber (4) under the pyrolysis chamber (2) is divided into reducing zone (10) and burning-out zone (7), described reducing zone (10) is positioned on the inclined grate, burning-out zone (7) under reducing zone (10), with inclined grate, reducing zone (10) and the corresponding furnace wall of burning-out zone (7) on be respectively equipped with a wind inlet (20), secondary wind inlet (5) and tertiary air import (3);
Its combustion step is as follows:
1) biomass fuel is sent into pyrolysis chamber (2) from the hopper (1) of upper of furnace body, utilizes biomass combustion produces on the inclined grate of combustion chamber (4) heat and pyrolysis chamber (2) bottom heat to make that living beings heat up, pyrolysis, separates out volatile matter, generates biomass coke;
2) the effect next part of the volatile matter of Sheng Chenging negative pressure in stove enters combustion chamber (4) and secondary wind and the tertiary air mixed combustion sent into from the connected entrance (9) on the dividing plate (14), extenuate volatile matter and coke and rob the contradiction of oxygen burning mutually, reduce the high phenomenon of over-emitting black exhaust and CO discharging, improve efficiency of combustion;
3) biomass coke of another part volatile matter and generation moves up into reducing zone (10) under the effect lower edge inclined grate of gravity and rotation deslagging device (12), with a wind mixed combustion of sending into, because the part jet-black that produces when volatile matter and coke mixed combustion is adsorbed to coke surface when passing scorching hot coke layer, burnt along with the burning of coke, can be reduced the jet-black growing amount; The burning of (10) is an anoxycausis in the reducing zone, and the reducing atmosphere of formation can reduce the growing amount of NOx in the burning, and the NOx of burning generation can be reduced to N when passing scorching hot coke layer in addition
2, also can reduce the discharge capacity of NOx in the biomass fuel combustion process;
4) under the effect of gravity and rotation deslagging device (12), scorching hot lime-ash moves along inclined grate, enter burning-out zone (7) by reducing zone (10), with the after-flame wind mixed combustion of sending into burning-out zone (7), further after-flame, reduce ash content carbon, the lime-ash of generation is discharged to outside the stove under rotation deslagging device (12) drives.
10, press the low NOx combustion method of right 9 described living beings, it is characterized in that, described vertical shaft furnace (100) is a circular cross-section, described pyrolysis chamber (2) is positioned at the center of vertical shaft furnace (100), described secondary wind that is blown into by secondary air mouth (5) and three air inlets (3) and tertiary air along the pyrolysis chamber (2) tangentially send into.
11, press the low NOx combustion method of right 9 described living beings, it is characterized in that, described vertical shaft furnace (100) is the square-section, described pyrolysis chamber (2) is positioned at a side of vertical shaft furnace (100), and the described secondary wind inlet (5) on the furnace wall, described combustion chamber (4) is installed vertical with the furnace wall and angled smoke deflector (15) respectively with the upper-lower position place of tertiary air import (3).
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| CNB2004100986040A CN100434795C (en) | 2004-12-13 | 2004-12-13 | Biomass combustion device with low NOx emission and combustion method thereof |
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| CNB2004100986040A CN100434795C (en) | 2004-12-13 | 2004-12-13 | Biomass combustion device with low NOx emission and combustion method thereof |
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| CN1789807A true CN1789807A (en) | 2006-06-21 |
| CN100434795C CN100434795C (en) | 2008-11-19 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101650025B (en) * | 2008-08-15 | 2011-12-14 | 中国科学院过程工程研究所 | Decoupling combustion furnace and decoupling combustion method |
| CN104214767A (en) * | 2014-08-14 | 2014-12-17 | 中国环境科学研究院 | Method and device for reducing nitrogen oxides in smoke gas of industrial coal-fired boiler by biomass |
| CN106178936A (en) * | 2016-07-14 | 2016-12-07 | 胡大苇 | The processing method of the ash-laden gas produced in one heavy metal species pyrometallurgical processes |
| CN107300177A (en) * | 2016-04-16 | 2017-10-27 | 袁甫新 | Prevent lime-ash congestion refuse pyrolysis plant |
| US9951946B2 (en) | 2011-09-24 | 2018-04-24 | Weiqi Liu | High-efficiency clean burning method and device of macromolecular substance |
| CN113074363A (en) * | 2021-05-06 | 2021-07-06 | 浙江大学 | Device and method for realizing clean combustion of solid fuel |
| CN113416583A (en) * | 2021-07-29 | 2021-09-21 | 北京工商大学 | Biomass in-situ nitrogen-control gasification co-production hot carbon device |
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| HU178846B (en) * | 1980-03-11 | 1982-07-28 | Ernoe Biro | Stoker for firing solid fuel first for fulfilling the heat demand of family houses and single aparatments or smaller group of them |
| JPS62210305A (en) * | 1986-03-12 | 1987-09-16 | Mitsubishi Heavy Ind Ltd | Burner |
| CN1038446C (en) * | 1995-03-07 | 1998-05-20 | 中国科学院化工冶金研究所 | No-smoke burning coal method for control nitrogen oxide and stove and application |
| CN2337419Y (en) * | 1998-04-02 | 1999-09-08 | 中国科学院化工冶金研究所 | Two-side feeding coal smokeless coal-combustion stove capable of suppressing nitrogen oxide |
| CN1148528C (en) * | 2001-09-04 | 2004-05-05 | 中国科学院过程工程研究所 | Layered decoupling coal-burning technology and mechanical layered decoupling furnace |
| CN2585046Y (en) * | 2002-10-22 | 2003-11-05 | 冯之军 | Combustion furnace using gas produced by coal |
| CN2788023Y (en) * | 2005-01-12 | 2006-06-14 | 中国科学院过程工程研究所 | Biomass combustion device with low NOx emission |
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| CN101650025B (en) * | 2008-08-15 | 2011-12-14 | 中国科学院过程工程研究所 | Decoupling combustion furnace and decoupling combustion method |
| US9951946B2 (en) | 2011-09-24 | 2018-04-24 | Weiqi Liu | High-efficiency clean burning method and device of macromolecular substance |
| CN104214767A (en) * | 2014-08-14 | 2014-12-17 | 中国环境科学研究院 | Method and device for reducing nitrogen oxides in smoke gas of industrial coal-fired boiler by biomass |
| CN104214767B (en) * | 2014-08-14 | 2016-08-17 | 中国环境科学研究院 | A kind of method and device of biomass reduction coal-burned industrial boiler flue gas nitrogen oxide |
| CN107300177A (en) * | 2016-04-16 | 2017-10-27 | 袁甫新 | Prevent lime-ash congestion refuse pyrolysis plant |
| CN107300177B (en) * | 2016-04-16 | 2020-01-31 | 袁甫新 | Garbage pyrolysis device for preventing ash jam |
| CN106178936A (en) * | 2016-07-14 | 2016-12-07 | 胡大苇 | The processing method of the ash-laden gas produced in one heavy metal species pyrometallurgical processes |
| CN106178936B (en) * | 2016-07-14 | 2018-10-12 | 胡大苇 | The processing method of the ash-laden gas generated in one heavy metal species pyrometallurgical processes |
| CN113074363A (en) * | 2021-05-06 | 2021-07-06 | 浙江大学 | Device and method for realizing clean combustion of solid fuel |
| CN113074363B (en) * | 2021-05-06 | 2024-05-14 | 浙江大学 | Device and method for realizing clean combustion of solid fuel |
| CN113416583A (en) * | 2021-07-29 | 2021-09-21 | 北京工商大学 | Biomass in-situ nitrogen-control gasification co-production hot carbon device |
| CN113416583B (en) * | 2021-07-29 | 2022-06-24 | 北京工商大学 | Biomass in-situ nitrogen-control gasification co-production hot carbon device |
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