CN106753478A

CN106753478A - A kind of solid fuel staged combustion device and its staged-combustion method

Info

Publication number: CN106753478A
Application number: CN201611107749.1A
Authority: CN
Inventors: 殷秀峰; 王健
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-12-06
Filing date: 2016-12-06
Publication date: 2017-05-31
Anticipated expiration: 2036-12-06
Also published as: CN106753478B

Abstract

A kind of solid fuel staged combustion device and its staged-combustion method, are related to a kind of burner and its combustion method, device to include Bunker and solid-state combustion parts（1）, gaseous combustion part（2）, classification air feed part（3）With multigroup fire grate part（4）, Bunker and solid-state combustion parts（1）Including charging aperture（1.1）, newly fuel layer（1.2）, dry thermal cracking layer（1.3）With solid-state burning zone（1.4）；Gaseous combustion part（2）Positioned at the Bunker and solid-state combustion parts（1）Side, including air-breathing contraction section（2.1）, mixed pyrolysis section（2.2）And diffuser（2.3）；Classification air feed part（3）One-level air feed including bottom（3.1）And with gaseous combustion part（2）Two grades of connected air feeds（3.2）With three-level air feed（3.3）, the equal the pre-heat treatment of air feed；Staged-combustion method of the present invention can realize that solids fraction and gaseous component burn completely in solid fuel, really realize the cleaning burning of solid fuel.

Description

A kind of solid fuel staged combustion device and its staged-combustion method

Technical field

The present invention relates to a kind of device and its combustion method, more particularly to a kind of solid fuel staged combustion device and its Staged-combustion method.

Background technology

Solid fuel ignition discharge be one of important sources of atmosphere pollution, directly influence Regional Atmospheric Environment and The health of resident, current typical case is exactly the serious gray haze pollution of South Asia brown cloud and China.According to the World Health Organization Recent statistics, Present Global still has about 3,000,000,000 populations cannot to obtain clean energy resource, is still fired using solids such as coal, stalk, fuel woods Expect for cooking and warming oneself, it is most all in middle and low income country, so as to cause global 4.30 ten thousand people's premature deaths.

The burning of solid fuel, hence it is evident that used different from clean energy resource.Its burning not only burning comprising solids fraction, also There is the burning of volatile component in fuel.The direct-fired positive burning of extensive three stone formula burning and bottom air feed top can not be protected The burning completely of card solids fraction and gaseous component, outstanding behaviours quick cooling after fresh fuel addition causes flameout, So as to a large amount of poisonous and harmful atmosphere pollutions are by continued emissions, the straight phenomenon for emitting of dense smoke is shown as.

The decoupling combustion device and cofiring burner of research, have been carried out necessarily to conventional combustion device and technology recently Improvement, preferably resolve that solid fuel ignition efficiency is low and the unstable problem of process, improve to a certain extent solid The efficiency of combustion of solids fraction in fluid fuel, but when the combustion problem for volatile matter, it is only applicable to that volatile matter is relatively low to be consolidated Fluid fuel, the fuel of a relatively high for volatile matter is then still present the insufficient problem of burning.The solids fraction of solid fuel And volatilization（Can gaseous state）The ratio of component has a great otherness, and wherein volatile matter is accounted between 4% ~ 90% scope.Volatilization Point imperfect combustion, will directly produce the harmful substances such as a large amount of coal tar, polycyclic aromatic hydrocarbon and carbon black, to atmospheric environment and Health causes to have a strong impact on.

The content of the invention

It is an object of the invention to provide a kind of solid fuel staged combustion device and its staged-combustion method, root of the present invention Include solids fraction and the class burning feature of gaseous component two according to solid fuel ignition, it is special with reference to solid-state burning and gas burning Property, solid fuel classification treatment combustion method is devised, functional areas clearly differentiation and science burning are realized in burner Principle, classification realizes the burning completely of solids fraction and gaseous component in solid fuel, truly realize energy-conservation The effect of emission reduction.

The purpose of the present invention is achieved through the following technical solutions：

A kind of solid fuel staged combustion device, described device includes Bunker and solid-state combustion parts, gaseous combustion portion Divide, be classified air feed part and multigroup fire grate part；Bunker and solid-state combustion parts include charging aperture, newly fuel from top to bottom Layer, dry thermal cracking layer and solid-state burning zone；Gaseous combustion part is located at the Bunker and solid-state combustion parts side, and it is under And above include air-breathing contraction section, mixed pyrolysis section and diffuser；Classification air feed part include the one-level air feed of bottom and with gas State combustion parts connected two grades of air feeds and three-level air feed；Multigroup fire grate includes being located at solid-state burning zone bottom and one-level air feed top The italic fire grate and horizontal fire grate and the fixed grate positioned at the bottom of gas combustion part height identical with horizontal fire grate in portion.

A kind of described solid fuel staged combustion device, solid-state burning zone side in the Bunker and solid-state combustion parts Side is directly connected to air-breathing contraction section, and its thickness is suitable with air-breathing contraction section height；Dry thermal cracking layer is immediately on solid-state burning zone Portion, its thickness is suitable with solid-state burning zone thickness；Positioned at dry thermal cracking layer top, its thickness no requirement (NR) is only needed new layer of fueling Reach charging aperture；Charging aperture be located at newly fuel a layer top, position is not limited only to just go up, also can side or angle, only need satisfaction Feed to Bunker.

A kind of described solid fuel staged combustion device, the gas combustion part is venturi burner, and mixing is split Solution section is cylinder mixing tube, and its diameter is suitable with length, and length is not less than 10cm；Air-breathing contraction section is located under mixed pyrolysis section Face, and close to solid-state burning zone side, its width have to be larger than mixed tube diameter, highly be not less than 0.6 times of mixing length of tube, Also it is not above mixing 1.5 times of length of tube, its contraction mouth is located at mixing tube lower end, is around provided with two grades of air feed air outlets； Diffuser is located at mixed pyrolysis section above, and its width have to be larger than mixed tube diameter, highly be not less than mixing length of tube, its diffusion Mouth is located at mixing tube upper end, and surrounding installs three-level air feed air outlet, and its top is connected with heat transmission equipment.

A kind of described solid fuel staged combustion device, the air feed parts at different levels in the classification air feed part are only each other It is vertical, and can individually adjust, and use after every grade of air feed is preheated, so as to the clean and effective for realizing different solid fuels fires Burn.Wherein one-level air feed, below the Bunker and solid-state combustion parts homonymy, including air inlet and air intake passage （That is the first Slag Room）；Two grades of air feeds are arranged on solid-state burning zone lower periphery, and air inlet is located at body of heater front, and passage bypasses stove Gaseous combustion part is directly reached behind body front and both sides, the lower air intake passage with mixing tube periphery is connected；Three-level air feed is installed Around in the middle part of the solid-state burning zone, close to secondary intake adit upside, air inlet is located at body of heater front, and passage bypasses body of heater front And gaseous combustion part is directly reached behind both sides, the upper air inlet passage with mixing tube periphery is connected.

A kind of described solid fuel staged combustion device, multigroup fire grate part, italic fire grate is Double-layered movable stove Row, distance is not less than 3cm between bilayer, and grate surface and body of heater front form angle and be located between 0 ~ 90 degree, fire grate upper strata lower end Identical height is in horizontal fire grate, and is only existed compared with small gap（Generally no greater than 2cm）；Horizontal fire grate is Double-layered movable stove Row, distance is not less than 3cm between bilayer, and one section of fire grate and italic fire grate one end are close to, the other end and the first Slag Room and second Partition wall is close to two ends gap is not more than 2cm between Slag Room；Fixed grate is single layer fixed fire grate, installed in the second scarfing cinder Room top, below air-breathing contraction section, its span is directly connected with body of heater rear wall and Slag Room next door.

Described a kind of solid fuel staged combustion device, after the air feed parts at different levels of the classification air feed part preheat Use, wherein one-level air feed can be heated tentatively into the first Slag Room, then reach double grate intermediate layer, further high temperature adds Heat, finally reaches solid-state burning zone；After two grades of air feeds enter two grades of intake adits, its passage is only only around the solid-state burning of high temperature Layer, so as to be heated by radiation, then reaches the mixed pyrolysis section of venturi burner, can further be heated, so as to reach directly Combustion-supporting temperature；After three-level air feed enters three-level intake adit, its passage only only around the solid-state burning zone of high temperature, so as to by spoke Penetrate and heat, then reach the mixed pyrolysis section of venturi burner, can further be heated, so as to reach directly combustion-supporting high temperature.

A kind of solid fuel staged-combustion method, the described method comprises the following steps：

1）New to fuel arrival dry thermal cracking layer, solid fuel is dried and goes volatile matter process, realizes fixed carbon with volatilization Point separation, the dry thermal cracking floor height temperature time gaseous state thing such as the larger coal tar of the volatile matter material polymolecular amount that is pyrolyzed out and hydro carbons Matter, the fixed carbon isolated be in solid fuel under dry thermal cracking floor height temperature not volatile solids fraction, that is, realize The separation of two big combustible components in solid fuel；

2）Step 1）After the solid combustible component isolated enters solid-state burning zone, richness is carried out under an air feed effect after preheat Abundant burning under the conditions of oxygen is until after-flame；

3）Step 1）Isolate gaseous material under suction function by high-temperature solid burning zone, carry out the macromoleculars such as coal tar Material is tentatively cracked, the excess air mixed combustion of the material such as hydro carbons and hydrogen of its small molecular and First air, maintains gaseous state Fuel element high temperature and transfer fire；

4）Step 3）The small-molecule substance of generation and the macromolecular substances not cracked completely enter text under chimney suction function Burner contraction section in mound, further mixes with Secondary Air after preheating, and subsequently entering mixed pyrolysis section carries out eddying motion mixing Burning, realizes the abundant cracking of the macromoleculars such as coal tar, and the carrying out of small-molecule substance is burnt and maintain the continuity of thermal-flame；

5）Step 4）Combustible and combustion product after cracking reach diffuser, due to a large amount of consumption burnt to oxygen, And the great amount of carbon dioxide for producing breaks up as multiple broken small air mass fuel gas, to ensure combustible gas in these small air mass The abundant burning of body, the air after third time is preheated must be accorded to supplement, finally realize the burning completely of gaseous component.

Advantages of the present invention is with effect：

The present invention preferably synchronously cannot solve fuel during solid fuel ignition in solids fraction and gaseous component height Effect cleaning combustion problem, according to solid fuel ignition feature, with reference to solid-state burning and gas combustion characteristics, there is provided one kind can be with Classification realizes the solid fuel staged combustion device for burning completely and method of solids fraction and gaseous component in solid fuel.

Solid fuel staged combustion device of the invention has clearly divided the functional areas of solid fuel ignition, it will be apparent that set Solid fuel storehouse, dry thermal cracking layer, solid-state burning zone and gaseous state venturi burner etc. have been put, the sustainable supply of fuel has been ensured, The steady of fuel dryer pyrolysis is carried out, the burning completely of solids fraction, and the multistage of gaseous state volatile component cracks and fire completely Burn, it is achieved thereby that the steady high-efficiency cleaning burning of solid fuel.

Solid fuel staged combustion device of the invention and method can realize the high-efficiency cleaning burning of all kinds of solid fuels, Realize energy-saving and emission-reduction truly and still fired using solids such as coal, stalk, fuel woods at present using safety, or the whole world 3,000,000,000 populations of material culinary art and heating provide high-efficiency cleaning and the burner and combustion method using safety, improve regional atmospheric And human settlement, lifting human health level and extension life-span.

Brief description of the drawings

Fig. 1 is the structural representation of solid fuel staged combustion device of the invention；

Fig. 2 are the forward sight structure chart of solid fuel staged combustion device of the invention；

Fig. 3 are the venturi burner structure schematic diagram of solid fuel staged combustion device of the invention.

Specific embodiment

The present invention is described in detail for illustrated embodiment below in conjunction with the accompanying drawings.

Reference is：1st, Bunker and solid-state combustion parts, 2, gaseous combustion part, 3, classification air feed part, 4, many Group fire grate part, 5, Slag Room, 6, heat transmission equipment, 1.1, charging aperture, 1.2, newly fuel layer, 1.3, dry thermal cracking layer, 1.4, Solid-state burning zone, 2.1, air-breathing contraction section, 2.2, mixed pyrolysis section, 2.3, diffuser, 3.1, one-level air feed, 3.2, two grades of confessions Wind, 3.3, three-level air feed, 4.1, italic fire grate, 4.2, horizontal fire grate, 4.3, fixed grate, the 5.1, first Slag Room, 5.2, Two Slag Rooms.

It should be noted that：In description of the invention, term " " center ", " on ", D score, "left", "right", " vertical ", " water It is flat ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, merely to just Described in the description present invention and simplifying, rather than indicate imply signified device or element must have specific orientation, with Specific azimuth configuration and operation, therefore be not considered as limiting the invention.Additionally, term " first ", " second ", " Three " it is only used for describing purpose, and it is not intended that indicating or implying relative importance.Unless otherwise clearly defined and limited, Term " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, Or be integrally connected；Can mechanically connect, or electrically connect；Can be joined directly together, it is also possible to by intermediary It is indirectly connected to, can is two connections of element internal.For the ordinary skill in the art, can be managed with concrete condition Solve above-mentioned term concrete meaning in the present invention.

Fig. 1 and Fig. 2 are the structural representation of solid fuel staged combustion device of the invention and face structure chart, and burning is filled Put and mainly include Bunker and solid-state combustion parts 1, gaseous combustion part 2, classification air feed part 3 and multigroup fire grate part 4.Its Middle Bunker and solid-state combustion parts 1 are followed successively by charging aperture 1.1, newly fuel 1.3 and of layer 1.2, dry thermal cracking layer from top to bottom Solid-state burning zone 1.4；The gaseous combustion part 2 is located at the Bunker and the side of solid-state combustion parts 1, and it is wrapped from bottom to top Include air-breathing contraction section 2.1, mixed pyrolysis section 2.2 and diffuser 2.3；Multigroup fire grate 4 includes being located at solid-state burning zone bottom With the italic fire grate 4.1 and horizontal fire grate 4.2 at the top of one-level air feed and positioned at the bottom of gas combustion part and horizontal fire grate 4.2 mutually level fixed grates 4.3；The classification air feed part 3 includes the one-level air feed 3.1 and and gaseous combustion of bottom Part 2 connected two grades of air feeds 3.2 and three-level air feed 3.3；

The side of solid-state burning zone 1.4 is directly connected to air-breathing contraction section 2.1 in Bunker and solid-state combustion parts 1, its thickness with The height of air-breathing contraction section 2.1 is quite；The immediately top of solid-state burning zone 1.4 of dry thermal cracking layer 1.3, its thickness and solid-state burning zone 1.4 thickness are suitable；Positioned at 1.3 top of dry thermal cracking layer, its thickness no requirement (NR) only need to reach charging aperture to new layer 1.2 of fueling 1.1；Charging aperture be located at newly fuel a layer top, position is not limited only to just go up, also can side or angle, only need to meet charging to combustion Feed bin.

Fig. 3 are that the venturi burner structure of the gas combustion part 2 of solid fuel staged combustion device of the invention shows It is intended to, air-breathing contraction section 2.1 is directly connected to the side of solid-state burning zone 1.4 in Bunker and solid-state combustion parts 1, mixed pyrolysis Section 2.2 and diffuser are displaced upward successively.Wherein mixed pyrolysis section 2.2 is cylinder mixing tube, and its diameter is suitable with length, length Not less than 10cm；Air-breathing contraction section 2.1 is located at below mixed pyrolysis section 2.2, and close to the side of solid-state burning zone 1.4, its width The diameter of mixing tube 2.2 is have to be larger than, 0.6 times of the length of mixing tube 2.2 is highly not less than, the length of mixing tube 2.2 is also not above 1.5 times, its contraction mouth be located at mixing tube lower end, two grades of air outlets of air feed 3.2 are around installed；Diffuser 2.3 is located at mixing Above cracking section 2.2, its width have to be larger than mixed tube diameter, highly be not less than mixing length of tube, and its diffusion mouthful is located at mixing Pipe upper end, surrounding installs the air outlet of three-level air feed 3.3.

According to Fig. 1, Fig. 2 and Fig. 3, the air feed parts at different levels in the classification air feed part 3 are independent of one another, and can be independent Regulation, and use after every grade of air feed is preheated, so as to the clean and effective for realizing different solid fuels burns.Wherein one-level air feed 3.1, below the Bunker and the homonymy of solid-state combustion parts 1, including air inlet and air intake passage（That is the first Slag Room 5.1）；Two grades of air feeds 3.2 are arranged on the lower periphery of solid-state burning zone 1.4, and air inlet is located at body of heater front, and passage is bypassing body of heater just Gaseous combustion part 2 is directly reached behind face and both sides, the lower air intake passage with the periphery of mixing tube 2.2 is connected；Three-level air feed 3.3 is pacified Around the middle part of solid-state burning zone 1.4, close to the passage of secondary air feed 3.2 upside, air inlet is located at body of heater front, and passage is bypassed Gaseous combustion part is directly reached behind body of heater front and both sides, the upper air inlet passage with the periphery of mixing tube 2.2 is connected.

Solid fuel staged combustion device of the invention, multigroup fire grate part 4, italic fire grate 4.1 is Double-layered movable fire grate, Distance is not less than 3cm between bilayer, and grate surface and body of heater front form angle and be located between 0 ~ 90 degree, the upper strata lower end of fire grate 4.1 Identical height is in horizontal fire grate 4.2, and is only existed compared with small gap（Generally no greater than 2cm）；Horizontal fire grate 4.2 is double-deck living Dynamic fire grate, distance is not less than 3cm between bilayer, and one section of fire grate and italic fire grate one end are close to, the other end and the first Slag Room 5.1 And second partition wall between Slag Room 5.2 close to two ends gap is not more than 2cm；Fixed grate 4.3 is single layer fixed fire grate, peace Mounted in the top of the second Slag Room 5.2, below air-breathing contraction section 2.1, its span directly connects with body of heater rear wall and Slag Room next door Connect.

Solid fuel staged combustion device of the invention, the air feed parts at different levels of classification air feed part 3 use after preheating, Wherein one-level air feed 3.1 can be heated tentatively into the first Slag Room 5.1, then reach double grate intermediate layer, further high temperature Heating, finally reaches solid-state burning zone 1.4；After two grades of air feeds 3.2 enter two grades of intake adits, its passage is only only around high temperature Solid-state burning zone, so as to be heated by radiation, then reaches the mixed pyrolysis section of venturi burner, can further be heated, so that Reach directly combustion-supporting temperature；After three-level air feed 3.3 enters three-level intake adit, its passage is only only around the solid-state burning of high temperature Layer, so as to be heated by radiation, then reaches the mixed pyrolysis section of venturi burner, can further be heated, so as to reach directly Combustion-supporting high temperature.

Combustion method of the present invention based on solid fuel staged combustion device, comprises the following steps：

2）Step 1）After the solid combustible component isolated enters solid-state burning zone, enter from bottom air feed mouthful in an air feed, Then by rapidly pre-warming after wearing between double-layer grate, solid-state burning zone is reached so that solids fraction realizes filling under excess oxygen Divided combustion is until after-flame；So as to reduce the generation of CO in solids fraction combustion process to greatest extent；

5）Step 4）Combustible and combustion product after cracking reach diffuser, due to a large amount of consumption burnt to oxygen, And the great amount of carbon dioxide for producing can be broken up as multiple small air mass fuel gas, to ensure the abundant of these fuel gas Burning, third time preheat after air must be appropriate give and supplement, finally realize the burning completely of gaseous component；So as to real The high-efficiency cleaning burning of volatile components in solid fuel is realized, the very big emission reduction of pollutant is realized.

Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered Row equivalent；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims

1. a kind of solid fuel staged combustion device, it is characterised in that described device includes Bunker and solid-state combustion parts （1）, gaseous combustion part（2）, classification air feed part（3）With multigroup fire grate part（4）；Bunker and solid-state combustion parts（1） Include charging aperture from top to bottom（1.1）, newly fuel layer（1.2）, dry thermal cracking layer（1.3）With solid-state burning zone（1.4）；Gaseous state Combustion parts（2）Positioned at the Bunker and solid-state combustion parts（1）Side, it includes air-breathing contraction section from bottom to top（2.1）、 Mixed pyrolysis section（2.2）And diffuser（2.3）；Classification air feed part（3）One-level air feed including bottom（3.1）And and gaseous state Combustion parts（2）Two grades of connected air feeds（3.2）With three-level air feed（3.3）；Multigroup fire grate（4）Including positioned at solid-state burning zone bottom Italic fire grate at the top of portion and one-level air feed（4.1）With horizontal fire grate（4.2）And positioned at the bottom of gas combustion part and water Plain grate（4.2）Mutually level fixed grate（4.3）.

2. a kind of solid fuel staged combustion device according to claim 1, it is characterised in that the Bunker and solid-state Combustion parts（1）Middle solid-state burning zone（1.4）Side and air-breathing contraction section（2.1）It is directly connected to, its thickness and air-breathing contraction section （2.1）Height is quite；Dry thermal cracking layer（1.3）Immediately solid-state burning zone（1.4）Top, its thickness and solid-state burning zone（1.4） Thickness is suitable；Newly fuel layer（1.2）Positioned at dry thermal cracking layer（1.3）Top, its thickness no requirement (NR) only need to reach charging aperture （1.1）；Charging aperture be located at newly fuel a layer top, position is not limited only to just go up, also can side or angle, only need to meet feed extremely Bunker.

3. a kind of solid fuel staged combustion device according to claim 1, it is characterised in that the gas combustion part （2）It is venturi burner, mixed pyrolysis section（2.2）It is cylinder mixing tube, its diameter is suitable with length, and length is not less than 10cm；Air-breathing contraction section（2.1）Positioned at mixed pyrolysis section（2.2）Below, and close to solid-state burning zone（1.4）Side, its width Have to be larger than mixing tube（2.2）Diameter, is highly not less than mixing tube（2.2）0.6 times of length, is also not above mixing tube （2.2）1.5 times of length, its contraction mouth is located at mixing tube lower end, is around provided with two grades of air feeds（3.2）Air outlet；Diffuser （2.3）Positioned at mixed pyrolysis section（2.2）Above, its width have to be larger than mixed tube diameter, highly be not less than mixing length of tube, its Diffusion mouthful is located at mixing tube upper end, and surrounding installs three-level air feed（3.3）Air outlet, its top and heat transmission equipment（6）Connection.

4. a kind of solid fuel staged combustion device according to claim 1, it is characterised in that the classification air feed part （3）In air feed parts at different levels independently of one another, and can individually adjust, and use after every grade of air feed is preheated, so as to realize The clean and effective burning of different solid fuels；Wherein one-level air feed（3.1）, installed in the Bunker and solid-state combustion parts （1）Below homonymy, including air inlet and air intake passage（That is the first Slag Room（5.1））；Two grades of air feeds（3.2）Installed in solid-state combustion Burn layer（1.4）Lower periphery, air inlet is located at body of heater front, and passage directly reaches gaseous combustion after bypassing body of heater front and both sides Part（2）, with mixing tube（2.2）The lower air intake passage of periphery is connected；Three-level air feed（3.3）Installed in solid-state burning zone（1.4） Around middle part, close to secondary air feed（3.2）Passage upside, air inlet is located at body of heater front, and passage bypasses body of heater front and both sides Gaseous combustion part is directly reached afterwards, with mixing tube（2.2）The upper air inlet passage of periphery is connected.

5. a kind of solid fuel staged combustion device according to claim 1, it is characterised in that multigroup fire grate part （4）, italic fire grate（4.1）It is Double-layered movable fire grate, distance is not less than 3cm between bilayer, grate surface forms angle with body of heater front Degree is located between 0 ~ 90 degree, fire grate（4.1）Upper strata lower end and horizontal fire grate（4.2）In identical height, and only exist compared with crack Gap（Generally no greater than 2cm）；Horizontal fire grate（4.2）It is Double-layered movable fire grate, distance is not less than 3cm, one section of fire grate between bilayer With italic fire grate one end close to, the other end and the first Slag Room（5.1）With the second Slag Room（5.2）Between partition wall close to two End gap is not more than 2cm；Fixed grate（4.3）It is single layer fixed fire grate, installed in the second Slag Room（5.2）Top, air-breathing is received Contracting section（2.1）Below, its span is directly connected with body of heater rear wall and Slag Room next door.

6. a kind of solid fuel staged combustion device according to claim 1, it is characterised in that the classification air feed part （3）Air feed parts at different levels preheat after use, wherein one-level air feed（3.1）Into the first Slag Room（5.1）Can tentatively be added Heat, then reaches double grate intermediate layer, and further high-temperature heating finally reaches solid-state burning zone（1.4）；Two grades of air feeds（3.2） Into after two grades of intake adits, its passage, so as to be heated by radiation, then reaches literary mound only only around the solid-state burning zone of high temperature In burner mixed pyrolysis section, can further be heated, so as to reach directly combustion-supporting temperature；Three-level air feed（3.3）Into three After level intake adit, its passage, so as to be heated by radiation, then reaches venturi burner only only around the solid-state burning zone of high temperature Mixed pyrolysis section, can further be heated, so as to reach directly combustion-supporting high temperature.

7. a kind of solid fuel staged-combustion method, it is characterised in that the described method comprises the following steps：