CN1110776A - No-smoke burning coal method for control nitrogen oxide and stove and application - Google Patents
No-smoke burning coal method for control nitrogen oxide and stove and application Download PDFInfo
- Publication number
- CN1110776A CN1110776A CN 95102081 CN95102081A CN1110776A CN 1110776 A CN1110776 A CN 1110776A CN 95102081 CN95102081 CN 95102081 CN 95102081 A CN95102081 A CN 95102081A CN 1110776 A CN1110776 A CN 1110776A
- Authority
- CN
- China
- Prior art keywords
- coal
- preheating
- zone
- chamber
- combustion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Solid-Fuel Combustion (AREA)
Abstract
The non-smoke coal burning method and furnace feature that coal layer is divided into preheating dry distillation zone and primary combustion zone, and air only goes through the primary combustion zone. In preheating dry distillation zone, the combustible substance generated by anoxic dry distillation is led via coal layer to primary combustion zone, where it is mixed with coal (coke or semicoke) and air, and burns. Residual combustible substance burns in secondary combustion zone.
Description
The invention belongs to combustion method and combustion apparatus technical field.Be specifically related to a kind of coal combustion process that in combustion furnace, makes the smokeless combustion that coal suppresses nitrogen oxide and with the smokeless coal-burning stove and the application thereof of the inhibition nitrogen oxide of the method design.
At present, many Industrial Boilers of China and Civil energy-saving cooking stove all use diffusing coal in a large number, and efficiency of combustion is extremely low, and produce serious pollution, and especially many intermittently small-sized stoves of coal supply that adopt, a large amount of black smokes of generation directly enter atmosphere, serious environment pollution wastes energy, and becomes problem anxious to be solved.
The main cause that produces the problems referred to above is that the combustion method of traditional coal furnace is very unreasonable, shows following two aspects:
1. air feed flows to identical with flammable fugitive constituent, mix (as shown in Figure 1) at low-temperature space: coal adds from the top, behind the coal, furnace temperature reduces, coal generating gasification and destructive distillation, the air concurrent that produces flammable fugitive constituent gas and entered by the coal furnace bottom can't enter the high-temperature region burning to low-temperature space.Therefore, a large amount of fuel gas also fully burn and just directly enter atmosphere;
2. oxygen supply irrational distribution: in stove, each position oxygen demand difference of coal seam, and therefore air feed causes irrational oxygen to distribute by whole coal seam.Especially fugitive constituent is separated out in the environment that has oxygen to exist, and generates NO easily, enters atmosphere after stain environment.
Fig. 1 illustrates the existing general coal furnace that is surrounded by outer furnace wall (1).Fire grate (3) is gone up and is combustion chamber (8), and air enters the combustion chamber from fire grate, directly passes through whole combustion chamber through the burning zone of bottom and the new adding coal seam on top.The fugitive constituent that superjacent is separated out by the heat effect of bottom burning zone together mixes with the flue gas that burning produces, and fully burning does not promptly enter atmosphere, causes severe contamination.So it is unreasonable that the co-flow of air feed and fuel gas and oxygen supply distribute, and is that coal can not fully burn, cause the main cause of high pollution, poor efficiency.
For addressing the above problem, many in recent years inventors have taked some measures from handling the combustible angle that destructive gasifying produces on combustion furnace.As: CN86 108073 A patent documentations are put down in writing, and the destructive gasifying combustible that produces before coal is caught fire, is introduced high-temperature burner hearth then again and burnt by the mandatory sucking-off of air blast from preheating volatilization chamber.This method is that combustible is drawn in stove, sends into the furnace high-temperature district again and burns.And for example: the record of CN1056155A patent documentation, in burner hearth, increase a coal breeching, breeching top has a carbonizing gas recovery tube to lead to outside the stove, by this recovery tube, after the collection of destructive distillation gas, comprehensive utilization.Though above-mentioned two methods can solve fugitive constituent and together enter atmosphere with the air feed air-flow, the problem that pollutes, the furnace binding complexity, but also to add a set of equipment in addition, and both improved cost, consumed the energy again.Implement very difficulty.In addition, this method also is unfavorable for eliminating the NO that generates in the combustion product.
The purpose of this invention is to provide a kind of easy, can make that coal is efficient, the method for pollution-free burning.This method makes the only high temperature combustion zone by the coal seam of air, and the incorgruous inflow high temperature combustion zone of the combustible mixed combustion that the destructive distillation of another part coal seam is produced, and the NO of this district generation is reduced.
Another object of the present invention is according to a kind of auxiliary device that do not increase of said method design, makes the smokeless coal-burning stove of coal clean-burning inhibition nitrogen oxide in stove.
Another purpose of the present invention provides a kind of smokeless coal burning boiler that has the inhibition nitrogen oxide of heat exchanger.
The object of the present invention is achieved like this:
1. design a kind of coal combustion process that suppresses the smokeless combustion of nitrogen oxide in coal furnace: the primary air that enters the combustion chamber by fire grate contacts with the coal seam of combustion chamber and burns, and this method may further comprise the steps:
Make the primary air that enters through fire grate only by the part coal seam, this part coal seam forms the primary combustion zone, air is another part coal seam by fusing with the coal seam, primary combustion zone not, this part coal seam forms the preheating dry distillation area of preheating destructive distillation chamber, primary combustion zone burning end face is communicated with the intermediate zone, coal joins in the preheating dry distillation area from the coal filling hole of preheating destructive distillation chamber, anoxic destructive distillation continuously under airtight environment;
Make in the gaseous material that coal destructive distillation under airtight environment produces the nitrogen element mainly with reducing substances NH
3Form exist;
Make between preheating dry distillation area and the primary combustion zone and form pressure reduction, this pressure reduction
-make the primary air that enters from the combustion chamber fire grate only by the primary combustion zone, required oxygen when satisfying coal combustion in this district;
-make fuel gas that preheating dry distillation area coal seam separates out directly thin gas passage in preheating dry distillation area coal seam or preheating dry distillation area and incorgruous primary combustion zone mixed combustion, the reducing substances NH wherein of entering of primary air
3React with the NO that generates in the primary combustion zone and to generate N
2And H
2O;
By gravity or the coal that provides other motive force to make to add the preheating dry distillation area move and heat up to the primary combustion zone gradually, enter the primary combustion zone burning, the lime-ash in afterburnt is discharged through fire grate;
Make between primary combustion zone and the intermediate zone and form pressure reduction, this pressure reduction makes in the primary combustion zone unburnt combustible enter the intermediate zone and fully mixes with the auxiliary air that enters the intermediate zone, carries out second-time burning, and promotes NO and NH
3Reaction, the product after the burning enters atmosphere through fume extractor.
2. by a kind of smokeless coal-burning stove that suppresses nitrogen oxide of above-mentioned coal combustion process design: show that as Fig. 2 this coal furnace is by outer furnace wall (1), furnace chamber (2), fire grate (3), coal filling hole (4), exhaust opening (5), fume extractor (chimney) (6) is formed.The furnace chamber (2) that is surrounded by outer furnace wall (1) is separated into preheating destructive distillation chamber (7) and combustion chamber (8) by internal protecting wall (12), and two Room communicate, and combustion chamber (8) are divided into primary combustion zone (9) and intermediate zone (10).Primary combustion zone (9) one ends communicate with intermediate zone (10), and the other end is established fire grate (3).Preheating destructive distillation chamber (7) is provided with the coal filling hole (4) that has sealing device, coal seam in it is preheating dry distillation area (11), the coal of the coal in this district and primary combustion zone (9) is linked to be an integral body, the exhaust opening (5) of secondary air mouth (15) is established in intermediate zone (10), and exhaust opening (5) links to each other with fume extractor (6).
3. use the smokeless coal-burning stove of the inhibition nitrogen oxide of above-mentioned combustion method design to can be used for heating various forms of heat exchangers, make a kind of smokeless coal-burning boiler that can suppress the nitrogen oxide generation, a kind of example of this boiler as shown in Figure 7, in the above-mentioned intermediate zone that can suppress the smokeless coal-burning stove of nitrogen oxide generation heat exchanger has been installed, this heat exchanger is made up of water jacket (17) and heat exchanger tube (18).
4. according to the smokeless coal-burning stove of the inhibition nitrogen oxide of above-mentioned coal combustion process design,, form combustible gas enters the combustion chamber by the preheating dry distillation area thin gas passage at the indoor member that is provided with of preheating destructive distillation.
Theoretical foundation of the present invention is:
A series of physics that coal takes place when continuing to be heated to higher temperature in inert atmosphere and chemical change are called destructive distillation (or pyrolysis), and the chemical reaction that takes place under the not enough condition of oxygen is called gasification.Destructive distillation and gasification all can form gaseous state combustible, tar liquid and solid-state semicoke or coke.These materials must at high temperature be met oxygen and could be burnt.So in the low temperature coal seam, coal can not burn, and can only finish destructive distillation and gasification, therefore there is no need to low temperature coal seam supply air.According to these characteristics of coal combustion, determined that main points of the present invention are that air supplied should concentrate on high temperature combustion zone as far as possible, the low temperature coal seam then needs secluding air, carries out coal carbonization under the environment of airtight anoxia.In the environment of secluding air, the nitrogen element is mainly with reducing substances NH in the gaseous material that the dry distillation of coal produces
3Form exist; And in the environment of oxygen was arranged, the nitrogen element in the fugitive constituent then existed with the form of NO.So the destructive distillation of coal secluding air helps controlling the emission of NO.If NO and NH
3Meet, then following reaction: 6NO+4NH can take place
3=5N
2+ 6H
2O if any the oxygen existence of abundance, then can promote the carrying out of this reaction.Therefore, if can make NH in the destructive distillation product
3The NO that produces with coal-char combustion meets.Can reduce the NO emission measure.
The present invention compared with prior art, the good effect following points that bring:
1. the present invention finds out present coal and can not fully burn, the subject matter that exists on combustion method is: (1) air feed flows to identical with the fuel gas that destructive distillation (gasification) produces, fuel gas is mixed at low-temperature space with oxygen, and also inabundant burning just enters atmosphere, pollutes; (2) oxygen irrational distribution in the coal seam, the equal air feed in low-temperature space and high-temperature region had both been wasted the energy, and coal is fully burnt.The proposition of these problems improves efficiency of combustion and has pointed out direction for improving combustion method from now on.
2. the present invention is according to burning of coal mechanism, proposed to make coal to suppress the method for the smokeless combustion of nitrogen oxide, satisfied coal in the demand of burning different phase to temperature, oxygen, destructive distillation is carried out smoothly, can make semicoke and destructive distillation gaseous products and air mixed combustion easily after the dry distillation of coal again, thereby realizing suppressing the smokeless combustion of nitrogen oxide, is a kind of new coal combustion technology.
3. combustion method provided by the invention can reduce the emission measure of NO pernicious gas, because fugitive constituent separates out in the environment of secluding air, thus do not produce NO, and produce reducing substances NH
3, NH
3React with NO after entering the combustion zone.Thereby reduced the emission of NO effectively.
4. according to the coal furnace of method design provided by the invention, do not need other oil (gas) filling device, the fuel gas that coal preheating destructive distillation produces is directly in the stove internal combustion, and no black smoke is discharged, and has both protected environment, has reduced cost again, has saved the energy.
5. combustion method provided by the invention is simple and easy to realize, and is compatible strong with existing combustion method, can with the supporting use of various forms of heat transmission equipments, utilization property is strong, applied widely, both is fit to Civil energy-saving cooking stove, is fit to industrial arcola again.
Below be each accompanying drawing title:
Fig. 1 has the coal furnace schematic diagram now;
The schematic diagram of Fig. 2 the inventive method;
Fig. 3 is by the coal furnace of the inventive method design;
Fig. 4 has the coal furnace of member;
Fig. 5 is by a kind of coal furnace structural representation of the inventive method design;
Fig. 6 is by a kind of coal furnace structural representation of the inventive method design;
Fig. 7 has a pipe heat exchanger coal furnace structural representation by the inventive method design.
Below be each component names of accompanying drawing:
(1) outer furnace wall (2) furnace chamber (3) fire grate (4) coal filling hole
(5) combustion chamber, exhaust opening (6) chimney (fume extractor) (7) preheating destructive distillation chamber (8)
(9) intermediate zone, primary combustion zone (10) (11) preheating dry distillation area (12) internal protecting wall
(13) air inlets (14) preheating dry distillation area is dredged gas passage (15) secondary air mouth (16) member
(17) water jacket (18) heat exchange smoke pipe (19) outlet valve (20) water intaking valve
(21) the interim coal filling hole of safety valve (22) bypass channel (23) bypass valve (24)
(25) seal (26) slag-drip opening (27) auger feeder (28) burner of raising
Below in conjunction with drawings and Examples the present invention is further introduced:
Embodiment 1: as shown in Figure 2, internal protecting wall (12) will be separated into preheating destructive distillation chamber (7) and combustion chamber (8) by the furnace chamber (2) that outer furnace wall (1) surrounds, and the fire grate (3) by bottom, combustion chamber (8) enters the primary air of primary combustion zone (9) and contacts with coal seam in this district and burn; The coal filling hole (4) of preheating destructive distillation chamber (7) is in sealing state usually, make the primary air that enters through fire grate (3) only by part coal seam at furnace bottom, this part coal seam forms primary combustion zone (9), air is another part coal seam by fusing with coal seam, primary combustion zone (9) not, this part coal seam forms the preheating dry distillation area (11) of preheating destructive distillation chamber (7), this distinguishes the top of in the primary combustion zone (9), (9) absorb heat to the coal of preheating dry distillation area (11) from the primary combustion zone, primary combustion zone (9) burning end face is communicated with intermediate zone (10), coal joins in the preheating dry distillation area (11) from the coal filling hole (4) of preheating destructive distillation chamber (7), anoxic destructive distillation continuously under airtight environment makes in the gaseous material that coal destructive distillation under airtight environment produces the nitrogen element mainly with reducing substances NH
3Form exist because secluding air, NO can not form; Because preheating destructive distillation chamber (7) sealing, therefore make between preheating dry distillation area (11) and primary combustion zone (9) and form pressure reduction, the pressure of preheating destructive distillation chamber (7) is higher than the pressure of primary combustion zone (9), the primary air that the fire grate (3) of from the combustion chamber (8) is entered with regard to assurance only passes through primary combustion zone (9) like this, required oxygen when satisfying coal combustion in this district, also guarantee simultaneously to make fuel gas that preheating dry distillation area (11) coal seam separates out directly through the coal seam and incorgruous primary combustion zone (9) mixed combustion, the reducing substances NH wherein of entering of primary air of preheating dry distillation area (11)
3React with the NO that generates in primary combustion zone (9) interior coal-char combustion process, generate N
2And H
2O, thus the content of NO in the smoke evacuation reduced, reduced atmosphere pollution.
Deadweight by coal is moved and the intensification destructive distillation coal that adds preheating dry distillation area (11) gradually to primary combustion zone (9), enter primary combustion zone (9) burning then, the lime-ash in afterburnt is discharged through fire grate (3), as when coking occurring, also can provide other motive force (as: mechanical or manual mode of disclosing fire) that coal is moved down.As adopt coal furnace horizontal or that tilt, it is essential providing mechanical motive force to make the coal motion.Make between primary combustion zone (9) and intermediate zone (10) with fume extractor (6) (chimney or blower unit) and to form pressure reduction, this pressure reduction makes the interior unburnt combustible in primary combustion zone (9) enter intermediate zone (10), and fully mix with the auxiliary air that enters intermediate zone (10) through secondary air mouth (15), carry out second-time burning, because the existence of oxygen can promote NO and NH
3Reaction, therefore so NO content further reduces, realized suppressing the smokeless combustion of nitrogen oxide, the product after the burning enters atmosphere through fume extractor (6).
Embodiment 2: Fig. 3 illustrates the smokeless coal-burning stove by the inhibition nitrogen oxide of method design of the present invention, this stove is made up of outer furnace wall (1), furnace chamber (2), fire grate (3), coal filling hole (4), exhaust opening (5), chimney (6), the furnace chamber (2) that is surrounded by the outer furnace wall (1) of coal furnace is separated into preheating destructive distillation chamber (7) and combustion chamber (8) by internal protecting wall (12), and two Room communicate.Combustion chamber (8) is divided into the primary combustion zone (9) of bottom and the intermediate zone (10) that is attached thereto, and the upper end of primary combustion zone (9) communicates with intermediate zone (10), and the lower end of primary combustion zone (9) is provided with fire grate (3).Coal seam in the preheating destructive distillation chamber (7) is preheating dry distillation area (11), and the coal of preheating dry distillation area (11) lower end and the coal facies of primary combustion zone (9) are linked as an integral body.The top of preheating destructive distillation chamber is provided with the coal filling hole (4) of band sealing device, and this coal filling hole links to each other with auger feeder (27) and realizes sealing.The lower end of intermediate zone (10) is provided with secondary air mouth (15), and the upper end is provided with exhaust opening (5), and exhaust opening links to each other with chimney (6).
The burning flow process of this stove is: the fire grate (3) of primary air (9) bottom through the primary combustion zone enters primary combustion zone (9), contacts with coal in this district and makes coal combustion, and the lime-ash in afterburnt is discharged from fire grate (3).Because the sealing of the coal filling hole (4) of preheating destructive distillation chamber (7), primary air can not enter the preheating dry distillation area (11) in the preheating destructive distillation chamber (7).The coal that joins preheating dry distillation area (11) from the coal filling hole (4) of preheating destructive distillation chamber (7) moves to the primary combustion zone under himself gravity effect successively.In near the primary combustion zone process, the temperature fugitive constituent that raises is gradually progressively separated out, the semicoke that forms after the destructive distillation enters primary combustion zone (9), the combustible gas that the preheating destructive distillation is separated out then enters into primary combustion zone (9) by the coal seam of preheating dry distillation area (11) from top to down, and in primary combustion zone (9) with the primary air mixed combustion in this district of incorgruous inflow, unburnt imflammable gas material flows in the intermediate zone (10) in primary combustion zone (9), mix with the auxiliary air of introducing from secondary air mouth (15) and to carry out second-time burning, make that to enter the tail gas of chimney (6) from exhaust opening (5) clean smokeless, the principle that suppresses the NO emission is with embodiment 1.
Embodiment 3: the smokeless coal-burning stove of the inhibition nitrogen oxide shown in Fig. 4 is provided with the member (16) of grid type in preheating dry distillation area (11), in diagram, form combustible gas between member (16) and the internal protecting wall (12) and enter the thin gas passage (14) of primary combustion zone, combustion chamber (9) by preheating dry distillation area (11), mobile with the fuel gas that promotes this district to separate out to the primary combustion zone.Aperture plate member (16) can be located at the different parts of preheating dry distillation area (11), (9) port of export enters this district and is advisable but so that combustible is as far as possible in the primary combustion zone, can more effectively reduce the emission of NO like this, the formation of dredging the gas passage also can be in different ways, provide thin gas passage (14) as long as can enter primary combustion zone (9) for the combustible gas in the preheating dry distillation area (11) easily, the resistance of dredging gas passage (14) can not be too greatly to prevent the interior combustible gas gathering in preheating destructive distillation chamber (7).
The coal filling hole that this embodiment also illustrates the preheating destructive distillation chamber (7) of the smokeless coal-burning stove that suppresses nitrogen oxide is to be inserted in the water sealed tank of coal filling hole (4) by seal (25) to realize sealing.The water sealed tank midium or long term maintains water, and better effects if is opened seal (25) when the need coal, seals up after adding, to keep preheating destructive distillation chamber airtight again.
Embodiment 4,5: the preheating destructive distillation chamber (7) of the smokeless coal-burning stove of the inhibition nitrogen oxide shown in Fig. 5, Fig. 6 is located at the center of furnace chamber (2), the wall of preheating destructive distillation chamber (7) is internal protecting wall (12), space between annular space that internal protecting wall forms between outer furnace wall (1) and (7) lower end, preheating destructive distillation chamber and the fire grate (3) forms combustion chamber (8), coal seam in the combustion chamber (8) is primary combustion zone (9), and the annular space on top, primary combustion zone (9) is intermediate zone (10).Outer furnace wall one side of secondary wind (10) bottom from the intermediate zone enters.Fire grate (3) all is located at the bottom of combustion chamber, and air enters through fire grate (3), and lime-ash is also discharged from fire grate (3), and favourable coal is protruded in the upper end of combustion chamber in the upper end, preheating destructive distillation chamber of the coal furnace shown in Fig. 5.One side of (10) mouth (5) that begins to rehearse from the intermediate zone.The intermediate zone of the combustion chamber of the coal furnace shown in Fig. 6 (10) extends upward, and surrounds preheating destructive distillation chamber (7) fully, and the upper end of preheating destructive distillation chamber (7) is coal filling hole (4), and intermediate zone (10) then extend upward and be punctured into exhaust opening (5).
The burning flow process of Fig. 4, Fig. 5 and coal furnace shown in Figure 6 is identical with the burning flow process of coal furnace shown in Figure 3.
Embodiment 6: Fig. 7 is the smokeless coal-burning stove of the inhibition nitrogen oxide that designs of the present invention and heat exchanger assembling and a kind of smokeless hot-water boiler schematic diagram that suppresses nitrogen oxide of forming, it is an example of claim 4, and promptly the smokeless coal-burning stove with the inhibition nitrogen oxide of the present invention design heats various forms of heat exchangers.As shown in Figure 7, mounting heat exchanger around the top, intermediate zone (10) of coal furnace shown in Figure 4 reaches, this heat exchanger is made up of ring all water jackets (17) and heat exchange smoke pipe (18), heat exchange smoke pipe (18) is located in the water jacket (17), water jacket (17) bottom is provided with hot water effluent's valve (19), top is provided with cold water water intaking valve (20) and safety valve (21), and the bottom, intermediate zone is provided with interim coal filling hole (24).Be balance preheating destructive distillation chamber (7) and the interior pressure of chimney (6), bypass channel (22) has been communicated with preheating destructive distillation chamber and chimney (6), and bypass channel (22) is provided with bypass valve (23).Fire grate (3) top of primary combustion zone (9) is provided with slag-drip opening (26), and coal filling hole (4) is realized sealing with water sealing method.The member (16) that forms the thin gas passage (14) of combustible of preheating dry distillation area (7) is made of a branch of down-comer that links to each other with water jacket (17) one sides, and the leftover bits and pieces circle for the protection water jacket scribbles refractory material around it.
The using method of the less boiler of inhibition nitrogen oxide shown in Figure 7 is: after stove was lighted, heat exchanger absorbed the heat of middle primary combustion zone (9), combustion chamber (8) and intermediate zone (10) generation.The combustion tail gas of intermediate zone (10) flows to exhaust opening (5) by the heat exchanger tube (18) of heat exchanger, and enters chimney (6), and the waste heat of tail gas is absorbed by heat exchanger tube.Under common fired state, bypass channel (22) is blocked by bypass valve (23), make preheating destructive distillation chamber (7) be in air-tight state, when the need coal, open bypass valve (23) earlier, pressure between balance preheating destructive distillation chamber (7) and chimney (6), the seal of opening then on the coal filling hole (4) (25) carries out coal, add the seal (25) of closing bypass valve (23) and coal filling hole (4) behind the coal, realize the combustion process of smokeless coal-burning stove of the inhibition nitrogen oxide of the present invention's design.The member (16) that is made of the tube bank that descends has promoted the water circulation at water jacket (17) leftover bits and pieces circle place on the other hand on the one hand for combustible provides the thin gas passage (14) that flows to primary combustion zone (9), prevents cause thermal damage.In the hot stage just commonly used, an air inlet (13) is in open state, interim coal filling hole (24) on the intermediate zone (10) is in closed condition, to form the pressure reduction between normal primary combustion zone (9) and intermediate zone (10), guarantees normal combustion.When needs are banked up a fire, close an air inlet (13), open interim coal filling hole (24) and auxiliary air inlet (15) is reached maximum, realize banking up a fire.As the need cooling of banking up a fire fast, then add an amount of coal, thereby reach the purpose of banking up a fire fast from interim coal filling hole (24).In the time of need firing, close interim coal filling hole (24), open an air inlet (13), secondary air mouth (15) according to circumstances determines its aperture.Slag-drip opening (26) is used to discharge the lime-ash of primary combustion zone, as coking occurs, then handles by the burner of raising (28) of being located at outer furnace wall one side.
Claims (4)
1, a kind of coal combustion process that in coal furnace, suppresses the smokeless combustion of nitrogen oxide, the primary air that enters the combustion chamber by fire grate contacts with the coal seam of combustion chamber and burns, and it is characterized in that may further comprise the steps:
Make the primary air that enters through fire grate only by the part coal seam, this part coal seam forms the primary combustion zone, air is another part coal seam by fusing with the coal seam, primary combustion zone not, this part coal seam forms the preheating dry distillation area of preheating destructive distillation chamber, primary combustion zone burning end face is communicated with the intermediate zone, coal joins in the preheating dry distillation area from the coal filling hole of preheating destructive distillation chamber, anoxic destructive distillation continuously under airtight environment;
Make in the gaseous material that coal destructive distillation under airtight environment produces the nitrogen element mainly with reducing substances NH
3Form exist;
Make between preheating dry distillation area and the primary combustion zone and form pressure reduction, this pressure reduction
-make the primary air that enters from the combustion chamber fire grate only by the primary combustion zone, required oxygen when satisfying coal combustion in this district;
-make fuel gas that preheating dry distillation area coal seam separates out directly thin gas passage in preheating dry distillation area coal seam or preheating dry distillation area and incorgruous primary combustion zone mixed combustion, the reducing substances NH wherein of entering of primary air
3React with the NO that generates in the primary combustion zone and to generate N
2And H
2O;
By gravity or the coal that provides other motive force to make to add the preheating dry distillation area move and heat up to the primary combustion zone gradually, enter the primary combustion zone burning, the lime-ash in afterburnt is discharged through fire grate;
Make between primary combustion zone and the intermediate zone and form pressure reduction, this pressure reduction makes in the primary combustion zone unburnt combustible enter the intermediate zone and fully mixes with the auxiliary air that enters the intermediate zone, carries out second-time burning, and promotes NO and NH
3Reaction, the product after the burning enters atmosphere through fume extractor.
2, a kind of smokeless coal-burning stove of pressing the inhibition nitrogen oxide of the described coal combustion process design of claim 1 is made up of outer furnace wall (1), furnace chamber (2), fire grate (3), coal filling hole (4), exhaust opening (5), fume extractor (chimney) (6).It is characterized in that the furnace chamber (2) that is surrounded by outer furnace wall (1) is separated into preheating destructive distillation chamber (7) and combustion chamber (8) by internal protecting wall (12), two Room communicate, combustion chamber (8) is divided into primary combustion zone (9) and intermediate zone (10), primary combustion zone (9) one ends communicate with intermediate zone (10), the other end is established fire grate (3), preheating destructive distillation chamber (7) is provided with the coal filling hole (4) of band sealing device, coal seam in it is preheating dry distillation area (11), it is an integral body that the coal of the coal in this district and primary combustion zone (9) is linked to be, secondary air mouth (15) and exhaust opening (5) are established in intermediate zone (10), and exhaust opening (5) links to each other with fume extractor (6).
3, a kind of smokeless coal-burning stove of pressing the inhibition nitrogen oxide of the described coal combustion process design of claim 1 according to claim 2, it is characterized in that in preheating destructive distillation chamber (7), being provided with member (16), form combustible gas enters combustion chamber (8) by preheating dry distillation area (11) thin gas passage (14).
4, a kind of smokeless coal-burning coal stove of pressing the inhibition nitrogen oxide of the described combustion method design of claim 1 according to claim 2 is characterized in that this coal furnace can be used for heating various forms of heat exchangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95102081A CN1038446C (en) | 1995-03-07 | 1995-03-07 | No-smoke burning coal method for control nitrogen oxide and stove and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95102081A CN1038446C (en) | 1995-03-07 | 1995-03-07 | No-smoke burning coal method for control nitrogen oxide and stove and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1110776A true CN1110776A (en) | 1995-10-25 |
| CN1038446C CN1038446C (en) | 1998-05-20 |
Family
ID=5074169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95102081A Expired - Fee Related CN1038446C (en) | 1995-03-07 | 1995-03-07 | No-smoke burning coal method for control nitrogen oxide and stove and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1038446C (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092076C (en) * | 1997-06-25 | 2002-10-09 | 中国科学院化工冶金研究所 | Decoupled recirculating fluidized bed combustion system and its desulfurizing and denitrating process |
| CN1102419C (en) * | 1999-12-22 | 2003-03-05 | 中国科学院山西煤炭化学研究所 | Method of removing high-concentration nitrogen dioxide from fuel oil and its equipment |
| CN1114464C (en) * | 1999-12-22 | 2003-07-16 | 中国科学院山西煤炭化学研究所 | Method for treating high concentration nitrogen dioxide waste gas and its equipment |
| CN100375860C (en) * | 2004-12-13 | 2008-03-19 | 中国科学院过程工程研究所 | Multi-side stereo combustion boiler capable of realizing clean combustion of coal and combustion method thereof |
| CN100434795C (en) * | 2004-12-13 | 2008-11-19 | 中国科学院过程工程研究所 | Biomass combustion device with low NOx emission and combustion method thereof |
| CN100470126C (en) * | 2006-02-23 | 2009-03-18 | 中国科学院过程工程研究所 | Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus |
| CN104819455A (en) * | 2014-01-30 | 2015-08-05 | 车战斌 | Combustion method and device for solid fuel |
| CN104819456A (en) * | 2014-01-30 | 2015-08-05 | 车战斌 | Burning method and burning device of solid fuel |
| CN104896464A (en) * | 2014-03-05 | 2015-09-09 | 车战斌 | Combustion method and combustion device of solid fuel |
| CN107726303A (en) * | 2017-10-24 | 2018-02-23 | 张大林 | One kind has bituminous coal burning smoke smokeless emission combustion method and device |
| CN112361326A (en) * | 2020-11-23 | 2021-02-12 | 河北惠华达宇科技有限公司 | Back-burning gasification type decomposition combustion method and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2141027Y (en) * | 1991-11-16 | 1993-08-25 | 戴瑞乐 | Coal-fired furnance |
| CN2130238Y (en) * | 1992-03-24 | 1993-04-21 | 刘育省 | Soft coal smoke-removing burner |
| CN1074743A (en) * | 1992-12-24 | 1993-07-28 | 张行修 | Coal low temperature distillation burner |
-
1995
- 1995-03-07 CN CN95102081A patent/CN1038446C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1092076C (en) * | 1997-06-25 | 2002-10-09 | 中国科学院化工冶金研究所 | Decoupled recirculating fluidized bed combustion system and its desulfurizing and denitrating process |
| CN1102419C (en) * | 1999-12-22 | 2003-03-05 | 中国科学院山西煤炭化学研究所 | Method of removing high-concentration nitrogen dioxide from fuel oil and its equipment |
| CN1114464C (en) * | 1999-12-22 | 2003-07-16 | 中国科学院山西煤炭化学研究所 | Method for treating high concentration nitrogen dioxide waste gas and its equipment |
| CN100375860C (en) * | 2004-12-13 | 2008-03-19 | 中国科学院过程工程研究所 | Multi-side stereo combustion boiler capable of realizing clean combustion of coal and combustion method thereof |
| CN100434795C (en) * | 2004-12-13 | 2008-11-19 | 中国科学院过程工程研究所 | Biomass combustion device with low NOx emission and combustion method thereof |
| CN100470126C (en) * | 2006-02-23 | 2009-03-18 | 中国科学院过程工程研究所 | Low-pollution efficient combustion method for coal-burning boiler and combustion apparatus |
| CN104819455A (en) * | 2014-01-30 | 2015-08-05 | 车战斌 | Combustion method and device for solid fuel |
| CN104819456A (en) * | 2014-01-30 | 2015-08-05 | 车战斌 | Burning method and burning device of solid fuel |
| CN104896464A (en) * | 2014-03-05 | 2015-09-09 | 车战斌 | Combustion method and combustion device of solid fuel |
| CN107726303A (en) * | 2017-10-24 | 2018-02-23 | 张大林 | One kind has bituminous coal burning smoke smokeless emission combustion method and device |
| CN112361326A (en) * | 2020-11-23 | 2021-02-12 | 河北惠华达宇科技有限公司 | Back-burning gasification type decomposition combustion method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1038446C (en) | 1998-05-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1916490B (en) | Smokeless burning technique and equipment with fire fontanel being setup inside furnace | |
| CN200958757Y (en) | Vertical thermal-decomposition incinerator | |
| CN100570219C (en) | Self-feeding and be the civil heating stove of fuel with the stalk briquette | |
| CN105674284A (en) | Vertical pyrolysis gasifier | |
| CN1110776A (en) | No-smoke burning coal method for control nitrogen oxide and stove and application | |
| CN2906375Y (en) | Coking and heating double-purpose furnace using biomass granular fuel | |
| CN1091777A (en) | The method and apparatus of control twin furnace equipment operation | |
| CN2606262Y (en) | Low-pollution refuse burning systems | |
| CN2644901Y (en) | Integral boiler for converting coal into coal gas for combustion | |
| CN2039826U (en) | Cycling combustion system for kiln smoke | |
| CN113405104A (en) | Large-capacity high-load double-hearth waste incineration device | |
| CN208562232U (en) | Solid waste medium temperature pyrocrack furnace | |
| CN2624057Y (en) | Small-sized inverse combustion coal gasification boiler | |
| CN106051777A (en) | Porous medium combustion device for garbage pyrolysis | |
| CN111765475A (en) | Circulating fluidized bed waste incineration boiler based on fire grate and working method thereof | |
| CN2788022Y (en) | Multi-side stereo combustion boiler capable of realizing clean combustion of coal | |
| CN206112943U (en) | Mechanical stoker formula waste gasification system of burning and turbulence burner | |
| CN2856734Y (en) | Vertical oxygen-enriched continuous incinerator | |
| CN100375860C (en) | Multi-side stereo combustion boiler capable of realizing clean combustion of coal and combustion method thereof | |
| CN1757967A (en) | Method for high temperature borning away refuse and its equipment | |
| CN2585046Y (en) | Combustion furnace using gas produced by coal | |
| CN212961718U (en) | Straw type charcoal combustion stove | |
| CN217057607U (en) | Biomass cooking and warming stove | |
| CN109579290B (en) | Preheating type civil heating stove and heating method thereof | |
| CN218202639U (en) | Combustion chamber system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING JIUZHOU GEWU TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: INSTITUTE OF PROCESS ENGINEERING OF CAS Effective date: 20040514 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee |
Owner name: INSTITUTE OF PROCESS ENGINEERING OF CAS Free format text: FORMER NAME OR ADDRESS: INST. OF CHEMICAL METALLURGY, CHINESE ACADEMY OF SCIENCES |
|
| CP03 | Change of name, title or address |
Address after: 100080 room 1, No. two main building, North 418, Beijing, Zhongguancun Patentee after: Institute of Process Engineering, Chinese Academy of Sciences Address before: 100080, No. two, No. 1, North Beijing, Zhongguancun Patentee before: Institute of Chemical Metallurgy,Chinese Academy of Sciences |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20040514 Address after: 100080 Beijing city Zhongguancun north two No. 1 Beijing jzgw Process Technology Co. Ltd. Patentee after: Beijing jzgw Process Technology Co.,Ltd. Address before: 100080 room 1, No. two main building, North 418, Beijing, Zhongguancun Patentee before: Institute of Process Engineering, Chinese Academy of Sciences |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19980520 Termination date: 20100307 |