CN203595151U

CN203595151U - Brick kitchen range furnace

Info

Publication number: CN203595151U
Application number: CN201320816186.9U
Authority: CN
Inventors: 车战斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-11
Filing date: 2013-12-11
Publication date: 2014-05-14
Anticipated expiration: 2023-12-11

Abstract

The utility model discloses a brick kitchen range furnace. The brick kitchen range furnace comprises a hearth. The hearth is defined by the side wall of a furnace body and used for allowing fuel to burn. A furnace mouth in which the bottom of a pan can be placed is formed above the hearth. A flue outlet for discharging burning tail gas is formed in the side wall of the furnace body. A feed port and a cleaning door which are communicated with the interior of the hearth are formed in the side wall of the furnace body, and the feed port is higher than the cleaning door. A grate is arranged at the position, corresponding to the feed port, in the hearth. A stockpiling region for biomass particle fuel to be placed in a centralized mode is arranged on the grate. The area of the stockpiling region is smaller than the area of the furnace mouth. An air supply grille is located below the grate. The brick kitchen range furnace is suitable for particulate biomass fuel to burn in the centralized mode, air pollution is avoided, and burning efficiency is improved.

Description

Large stove

Technical field

The utility model is about a kind of burner, relates in particular to a kind of solid-fuelled large stove of reproducible biological particles shape that uses.

Background technology

Large stove is the most widely used domestic stove in north of China rural area, the biomass fuels such as main burning straw, timber, and adopt comparatively original direct combustion mode.Existing large stove includes a burner hearth, is generally built by laying bricks or stones and is formed by the construction material such as brick or base, and above burner hearth, fire door embeds the large bavin pot of a bite.Conventionally under use state, large bavin pot is fixed with respect to burner hearth; Burner hearth below is provided with a feeding port, and the general conducting of outlet flue of burner hearth is in heated kang, and heated kang end is connected with flue; The using method of this large stove is first one end of the biomass fuel such as stalk, timber to be inserted in burner hearth from feeding port, from feeding port, the stalk in burner hearth is lighted, along with the after-flame such as stalk, timber in burner hearth, constantly in burner hearth, continue into stalk, to keep the continuous of burning.

As everyone knows, original stalk direct combustion mode has following unsurmountable defect: one, exhaust emission: when the fuel direct combustion formula burnings such as stalk, because the volatile matter in straw is just directly discharged in atmosphere with the form of black smoke at the state also not taking fire after separating out, inevitably atmosphere is polluted; They are two years old, efficiency of combustion is very low, experimental results show that the efficiency of combustion less than 23% of stalk direct combustion, its reason is that in stalk, content accounts for 70% fugitive constituent and do not participate in burning, need a large amount of fuel so obtain heat energy by stalk direct combustion mode, general northern country one family needs burning straw 18-20 ton every year; Its three, use inconveniently, while adopting the mode of stalk direct combustion to cook, for the continuous to-be that maintains burning constantly continues the fuel into stalk, Chai He etc. in kitchen range, conventionally to use both hands and feet, operate very inconvenient; They are four years old, unclean, the feeding port of existing large stove opens wide, therefore in the time that burning straw is cooked or is warmed oneself, flame in burner hearth and flue gas often can return from feeding port, by even kitchen interior walls or furniture sooting of cooking stove, so adopt direct-fired large stove in rural area, be difficult to keep the clean hygiene in kitchen; They are five years old, easily produce unnecessary burning and waste fuel, as domestic stove (for example, family's use of cooking), conventionally only need about half an hour to one hour, after being finished, be difficult to the fuel such as stalk, timber of burning to extinguish, fuel all can only be burnt down, thereby cause unnecessary burning.Particularly, in Summer in Northern Part rural area, large stove is normally even burnt with heated kang, and this unnecessary burning not only causes the waste of fuel, can have influence on because heated kang is overheated indoor comfort level.

The defect existing for improving biomass straw fuel direct combustion, people made the granular fuel of living beings by biomass moulding technology in recent years, such as, after the biological materials such as stalk, straw, timber, wood chip and leaf are pulverized, carry out moulding, form granular solid fuel.Biomass granule fuel volume after moulding is compressed widely, contributes to realize the improvement of the combustion method to granular fuel, thereby makes volatile matter in living beings form one of main component of burning, and no longer directly discharges in the mode of black smoke.Therefore,, as reproducible alternative energy, particulate biomass fuel is more and more subject to people's attention and praises highly.But, the feature that volume is little, density is high just because of this particulate biomass fuel, in the time that it is used in the very large large stove of burner hearth, the granular fuel that is difficult to that volume has been dwindled greatly puts together formation and effectively burns, and is therefore granular biomass fuel and cannot directly adopts in existing large stove at all.

Thus, the inventor relies on experience and the practice of being engaged in for many years relevant industries, proposes a kind of large stove, to overcome the defect of prior art, both kept northern country to use the custom of large stove culinary art heating, and can make again the application of biomass granule fuel in large stove.

Utility model content

The purpose of this utility model is to provide a kind of large stove, in burner hearth, provide one biomass granule fuel can be concentrated to the region bearing, the feature high with adapted biomass granular fuel density, volume is little, makes large stove can be suitable for the burning of particulate biomass fuel.

Another object of the present utility model is to provide a kind of large stove, the volatile matter of biomass fuel is fully burned in burner hearth, the phenomenon of the atmosphere pollutions such as the over-emitting black exhaust that the large stove of fundamentally avoiding rural area to commonly use produces because of stalk direct combustion, realize the non-pollution discharge of biomass fuel, and improve the efficiency of combustion of biomass fuel, realize the efficient utilization to biomass fuel.

An object more of the present utility model is to provide a kind of large stove, keeps northern country to use in the custom situation of large bavin pot culinary art, and cooking operation is more convenient.

An object more of the present utility model is to provide a kind of large stove, and burning is clean, environment and the condition that can improve northern country Kitchen hygiene is provided.

Another object of the present utility model is to provide a kind of large stove, can realize disposable completing combustion, can use fuel to the demand of heat according to people, avoids unnecessary burning, meets the requirement of people to indoor temperature control and comfort level.

Another object of the present utility model is to provide a kind of large stove, can in culinary art, provide domestic hot-water.

The purpose of this utility model is achieved in that a kind of large stove, includes by sidewall of the furnace body and encloses the burner hearth for fuel combustion forming, and burner hearth top is provided with the fire door that can insert the bottom of a pan, and sidewall of the furnace body is provided with the flue outlet of deriving combustion tail gas; Feeding port in sidewall of the furnace body is provided with conducting burner hearth and cleaning door, feeding port is higher than cleaning door; In burner hearth, be provided with fire grate corresponding to feeding port place, fire grate is provided with for biomass granule fuel and concentrates the windrow region of putting; The area in described windrow region is less than fire door area; This large stove is provided with the air outlet of conducting burner hearth lower than the position of described fire grate.

In a preferred embodiments of the present utility model, described fire grate is extended in burner hearth by feeding port, and the area of fire grate forms described windrow region.

In a preferred embodiments of the present utility model, described fire grate is provided with enclosing, forms windrow region in enclosing.

In a preferred embodiments of the present utility model, extend to the direction close in the middle part of burner hearth from feeding port in described windrow region.

In a preferred embodiments of the present utility model, the downward-sloping setting of described fire grate, is formed with combustion space between fire grate and the bottom of a pan.

In a preferred embodiments of the present utility model, described large bavin pot is the large bavin pot of round bottom, the downward-sloping setting of fire grate and be almost parallel setting with large bavin the bottom of a pan cambered surface; Or the large bavin pot of institute is flat, and fire grate be arranged in parallel and is almost parallel setting with large bavin the bottom of a pan plane.

In a preferred embodiments of the present utility model, described flue outlet conducting is in heated kang inner flue or chimney.

In a preferred embodiments of the present utility model, described air outlet is made up of cleaning door; Described air outlet is arranged on sidewall of the furnace body; Or described air outlet is made up of cleaning door; Or described cleaning door is provided with the door that can open and close, form described air outlet by this aperture; Or described air outlet is arranged on the door of described cleaning door.

In a preferred embodiments of the present utility model, described air outlet is provided with volume adjusting apparatus.

In a preferred embodiments of the present utility model, described feeding port is provided with the door that can open and close, and described granular fuel is thrown in described windrow region by feeding port.

In a preferred embodiments of the present utility model, described fire grate is connected in the door of feeding port and forms drawing and pulling type fire grate, and when feeding port is closed, described fire grate extends internally and inserts in burner hearth.

In a preferred embodiments of the present utility model, in described burner hearth, be provided with water jacket, water jacket is provided with cold water inlet road and hot water effluent's pipeline, and the conducting of hot water effluent's pipeline, in supplying hot water place, forms hot water cyclesystem.

In a preferred embodiments of the present utility model, described sidewall of the furnace body is made up of interlayer, and described interlayer forms a water jacket, and described interlayer is provided with cold water inlet road and hot water effluent's pipeline, and the conducting of hot water effluent's pipeline, in supplying hot water place, forms hot water cyclesystem.

In a preferred embodiments of the present utility model, in described burner hearth, uniform ring is provided with the heat exchanger tube of multiple vertical settings; The two ends of described each heat exchanger tube are communicated in respectively described interlayer.

In a preferred embodiments of the present utility model, described burner hearth sidewall is made up of metal material.

From the above mentioned, large range of the present utility model has that burner hearth is large, the less feature in windrow region, in burner hearth, provide one biomass granule fuel can be concentrated to the region of putting, made large stove of the present utility model can be suitable for the burning of particulate biomass fuel.The using method of the large stove of the utility model, makes the volatile matter in biomass fuel after separating out, easily be lighted and enter very soon fired state, thereby has guaranteed that volatile matter has completed all processes of separating out with completing combustion in large stove.Therefore can not produce the phenomenon of soot emission, fundamentally avoid atmosphere pollution, improve widely the efficiency of combustion of biomass fuel simultaneously.The large stove of the utility model can be by the disposable filler of demand, and in whole combustion processes, is substantially closed state, thereby realizes the cooking operation that facilitates of large stove, has improved the sanitary condition of rural kitchen.

Accompanying drawing explanation

The following drawings is only intended to the utility model to schematically illustrate and explain, does not limit scope of the present utility model.Wherein:

Figure 1A: be the structural representation of the large stove embodiment mono-of the utility model.

Figure 1B: be the plan structure schematic diagram of Figure 1A.

Fig. 1 C: be the side-looking structural representation of Figure 1A.

Fig. 2 A: be a kind of structural representation of the large stove embodiment bis-of the utility model.

Fig. 2 B: be A-A revolved section schematic diagram in Fig. 2 A.

Fig. 3 A: be the another kind of structural representation of the large stove embodiment bis-of the utility model.

Fig. 3 B: be the plan structure schematic diagram of Fig. 3 A.

Fig. 3 C: be the side-looking structural representation of Fig. 3 A.

The specific embodiment

Understand for technical characterictic of the present utility model, object and effect being had more clearly, now contrast accompanying drawing the specific embodiment of the present utility model is described.

Embodiment mono-

As shown in Figure 1A, Figure 1B and Fig. 1 C, the present embodiment proposes a kind of large stove 100, includes by sidewall of the furnace body and encloses the burner hearth 1 for fuel combustion forming, and described burner hearth 1 top is provided with table table top 6, and burner hearth 1 top is provided with the fire door 61 that can insert the large bavin the bottom of a pan.Generally, large bavin pot is arranged at after fire door 61, can be by the burner hearth of large stove 1 from closed upper part.Sidewall of the furnace body is provided with the flue outlet 4 (flue outlet 4 can be communicated with heated kang, also can directly connect chimney) of deriving combustion tail gas.Feeding port 2 in sidewall of the furnace body is provided with conducting burner hearth and cleaning door 3, feeding port 2 is higher than cleaning door 3.Is provided with fire grate 5 corresponding to feeding port 2 places in burner hearth, fire grate 5 is provided with for biomass granule fuel and concentrates the windrow region 51 of putting, convenient by feeding port 2 to windrow region 51 interior input granular fuel; The area in described windrow region 51 is less than fire door 61 areas, the granular fuel of throwing in can be concentrated in windrow region 51, and can in large burner hearth, not scatter; This large stove is provided with the air outlet of conducting burner hearth lower than the position of described fire grate 5, guarantee that combustion-supporting gas upwards forms the flow direction through fuel assembly from the below of fire grate 5.

The using method of the large stove 100 of the present embodiment, doses quantitative particulate biomass fuel by feeding port 2 to the windrow region 51 of fire grate 5.Because the area in the windrow region 51 of fire grate 5 described in the present embodiment is less than fire door 61 areas, particulate biomass fuel very high density can be concentrated and stacked and form certain thickness fuel bed on fire grate 5, utilize outside burning things which may cause a fire disaster from the top of fuel bed by the superiors' ignited fuel, feeding port 2 is arranged and is closed condition, in whole combustion processes, feeding port 2, without opening, makes burner hearth 100 substantially be closed state again, there will not be the situation of tempering and time cigarette.Air outlet by fire grate 5 belows is blown, and lights because particulate biomass fuel has easily, forms a burning zone very soon on fuel bed upper strata; It is through fire grate 5 that the wind of sending into from fire grate 5 belows has a part at least, combustion-supporting to the burning zone on top from the gap of granular fuel, becomes flame at freeze profile.Along with the continuation of burning, the rising of the burning zone temperature in the superiors, fuel to its below adjacent bed heats destructive distillation, first volatile matter is wherein precipitated, from below the effect of wind-force under the lower-layer fuel volatile matter of separating out be exported, wherein wind guiding burning zone in part, and in the time passing through burning zone, lighted and burn, at the interior formation flame of burner hearth 1.The flame that windrow region 51 fuels produce is distributed in the bottom of a pan under the effect of flue suction force, and tail gas is derived by flue outlet 4.Because the volatile matter of separating out obtains burning quite fully in burner hearth, effectively avoid volatile matter form with black smoke in unburned situation to be discharged from, can accomplish to be conducive to environmental protection by non-pollution discharge completely; After Volatile in the fuel of adjacent lower floor, the fixed carbon composition in biomass fuel is lighted under the burning zone high temperature action of upper strata; Said process goes round and begins again, and all fuel that make to dose on fire grate 5 are lighted layer by layer, until the whole after-flames of all fuel.Due in the utility model, the efficiency of combustion of biomass fuel is very high, and each by quantitative the feeding intake of culinary art demand, so the ash amount producing in the process of each burning is little, leak downwards in the most of gap by particle of combustion ash producing at the top burning zone, or fallen by the wind of below.Experiment showed, that the top-down combustion method of the utility model does not only affect the ash discharge of upper strata burning zone, and also need to after each use, all will not carry out ash discharge operation.

The operation principle of large stove of the present utility model from the above mentioned, the structure of large stove of the present utility model is that a windrow region 51 that Area comparison is little is provided in burner hearth, the concentrated heap of the biological particles burning of having been compressed widely for volume contracting, thereby in burner hearth, provide one can be by the region of biomass granule fuel concentrated combustion, the feature that adapted biomass granular fuel density is high, volume is little, guarantee the smooth burning of particle burning in large stove, be suitable for the use of particulate biomass fuel.And the utility model method of stratified combustion from top to bottom, the volatile matter that can make biomass fuel separate out in top-down stratified combustion process very fully burns in burner hearth.Therefore, the large stove of the utility model does not in use have black smoke to discharge, and fundamentally avoids atmosphere pollution and improves efficiency of combustion.Large range of the present utility model has the feature that the burner hearth identical with existing large stove is large, the custom that can keep northern country to use brick kitchen range pot to cook.The large range of the utility model has enough large space to make even flame that the burning zone from concentrating in windrow region produces around large bavin pot bottom, thereby must arrive the bottom of a pan more uniform effect of being heated.

Further, in the present embodiment, described fire grate 5 is by feeding port 2 to the interior extension of burner hearth 1, and the area of fire grate 5 forms described windrow region 51, is convenient to feed intake to the windrow region 51 on fire grate 5.

In the utility model, as shown in Figure 1B, described cleaning door 3 is provided with movable closing door, is provided with conducting in the air outlet 31 of burner hearth on the closing door of cleaning door 3.But the setting position that it will be understood by those skilled in the art that this air outlet 31 is not limited to be arranged on closing door, for example, air outlet can directly be made up of cleaning door 3; Or air outlet also can be arranged at sidewall of the furnace body on the position lower than fire grate; Or form described air outlet by the aperture between closing door and cleaning door 3, describe in detail no longer one by one at this.In an optional example, this air outlet 31 is provided with volume adjusting apparatus (not shown), to regulate as required the wind supply quantity to burner hearth.

On described feeding port 2, can be provided with closing door to be opened/closed; This large stove, can be filled fuel according to user demand amount is disposable to windrow region 51 feedings on fire grate 5 by feeding port 2.After feeding, the closing door of feeding port 2 and cleaning door 3 is closed, combustion-supporting gas is provided by the air outlet 31 on the closing door of cleaning door 3.When cleaning door 3 is arranged at 51 below, windrow region, the wind major part entering from cleaning door 3 was passed through fuel bed, thereby by the volatile matter of separating out in the fuel bed burning zone of its top that leads, and lighted very soon and enter fired state.

In combustion process, brick kitchen range stove is full closeding state substantially, and it is indoor that the flame in burner hearth and flue gas do not return to kitchen, the cleaning in can holding chamber.Because the utility model is once to dose according to demand enough particulate biomass fuel, facilitate widely cooking operation.Realized disposable completing combustion, the fuel that avoids waste, is conducive to improve the unnecessary burning of large stove in summer and the impact on indoor temperature and comfort level of the waste heat that produces simultaneously.

Further, as shown in Figure 1A, in the present embodiment, described fire grate 5 is downward-sloping setting by burner hearth 1 edge to burner hearth middle part, and fire grate 5 and the bottom of a pan cambered surface are the state of almost parallel.Like this, between described fire grate 5 and the bottom of a pan, be formed with one comparatively uniformly along the downward-sloping flame combustion space of curved surfaces, the circle the bottom of a pan.This programme is applicable to use the large stove of the most frequently used round bottom brick kitchen range pot of northern country.When after ignited fuel, the flame that is positioned at the fuel bed the superiors tilt and be parallel to arc-shaped pot at the bottom of combustion space, start to spread along the surface in the whole large bavin the bottom of a pan from a side of large bavin pot, and equably around the bottom surface of large bavin pot.Therefore it is more even that, large stove of the present utility model makes being heated of the bottom of a pan.

Further, described fire grate 5 is provided with enclosing 7, the described windrow of the interior formation of enclosing 7 region 51, in the present embodiment, described enclosing 7 needn't be too high, become certain thickness as long as can make a certain amount of granular fuel divide open form, can avoid again the granular fuel that makes to be stacked on the fire grate 5 being obliquely installed to be scattered.

In the another embodiment of the present embodiment, fire grate 5 can be horizontally disposed with.The present embodiment is applicable to the flat large bavin pot that Korean nationality is used, and is parallel to the horizontal the bottom of a pan of large stove and is provided with fire grate in burner hearth 1.On fire grate 5 by enclose shelves 7 by granular fuel corral one above fire grate 5 compared with in rickle material region 51.The present embodiment can form a space of horizontal firing comparatively uniformly between at the bottom of horizontally disposed fire grate and pan.In present embodiment, enclose shelves 7 effect and be and contribute to the concentrated stacking of fuel and avoid it to scatter, so also can adopt other routine techniques scheme to realize.And in the present embodiment, shape and size and the installation form etc. of fire grate 5 are not needed to other specific (special) requirements.

In the present embodiment, described fire grate 5 is connected in the closing door of feeding port 2 and forms drawing and pulling type fire grate, and in the time that feeding port 2 is closed, described fire grate 5 is with the movement of the closing door of feeding port, extend internally and insert in burner hearth 1, complete the operation that feeds intake and close feeding port simultaneously.

In another embodiment of the present embodiment, described fire grate 5 can also be arranged in burner hearth by a support; Also can be fixedly connected on the inboard wall of furnace body that is provided with feeding port 2 and cleaning door 3.Fire grate 5 in the utility model is as a support body that can carry biomass granule fuel, its effect is to provide one can concentrate the space of placing by biomass granule fuel in burner hearth, and therefore fire grate 5 can adopt other conventional structure except such scheme.

The large range of the utility model has the following advantages:

1) in burner hearth, provide a space that makes granular fuel concentrate and place, realized the application of particulate biomass fuel in large stove.

2) due in the utility model, adopt particulate biomass fuel stratified combustion method from top to bottom, be conducive to volatile matter in fuel and in burner hearth, lighting and fully burning very soon after separating out.Experiment showed, that brick kitchen range stove of the present utility model there is no black smoke discharge, and ash amount seldom, realized environment protection emission.

3) efficiency of combustion is high, and for the large stove of direct combustion mode, the large stove of the utility model adopts biomass granule fuel, the efficiency of combustion of biomass fuel can be improved more than four times.Great many of experiments shows, uses the straw burning amount of northern country each household whole year of large stove of the present utility model to reduce to 4-5 ton from 18-20 ton.

4) the utility model in use, can, according to the disposable fuel that fills of demand, can facilitate cooking operation, can realize again disposable completing combustion, and fuel avoids waste.Improve the impact on indoor comfort degree of waste heat that Summer in Northern Part rural area produces because of culinary art.

5) the utility model in use burner hearth substantially in full closeding state, so all combustion processes are very clean, fundamentally solved the problem of rural kitchen health.

Embodiment bis-

Structure and the principle of the present embodiment and embodiment mono-are basic identical, and its difference is to be provided with heat-exchanger rig in burner hearth, and in culinary art, the cold water in heat exchanging device heats.As shown in Figure 2 A and 2 B, in the present embodiment, be provided with a water jacket 8 in burner hearth 1, water jacket 8 is provided with cold water inlet road and hot water effluent's pipeline, and the conducting of hot water effluent's pipeline, in supplying hot water place, forms hot water cyclesystem.In fuel combustion process, can heat the water in water jacket 8 simultaneously, and provide necessary hot water for life to people thus.

In the present embodiment, utilize and in burner hearth, be provided with heat-exchanger rig, utilize the heat in burner hearth to heat the cold water in heat-exchange device in culinary art simultaneously, domestic hot-water is provided.

The another kind of heat-exchanger rig of the present embodiment is as shown in Fig. 3 A, Fig. 3 B and Fig. 3 C, described sidewall of the furnace body is made up of interlayer 9, forms a water jacket by described interlayer 9, and described interlayer 9 is provided with cold water inlet road and hot water effluent's pipeline, the conducting of hot water effluent's pipeline, in supplying hot water place, forms hot water cyclesystem.The interior uniform ring of described burner hearth 1 is provided with the heat exchanger tube 91 of multiple vertical settings, and the two ends of described each heat exchanger tube 91 are communicated in respectively described interlayer 9, and cold water is concentrated in interlayer 9 afterwards in the interior heating of each heat exchanger tube 91.

The applicant finds in a large amount of experiments, and the large stove of the utility model is adopting after granular biomass fuel, and the outer wall of cooking stove still feels to have a large amount of heats to shed.Tracing it to its cause is that existing large stove is to be built by laying bricks or stones and formed by the construction material such as brick or base, and furnace wall is very thick, has absorbed a large amount of heat energy.And in the utility model, enclosed the large stove forming by metal material burner hearth sidewall, and thinner because of furnace wall, therefore have a large amount of heat energy and come out by furnace wall.The cold water utilizing in heat energy and the heat-exchanger rig that approaches furnace wall of can embodiment all can realizing of the above-mentioned heat-exchanger rig that the present embodiment passes through heats, thereby this partial heat energy is fully recycled, provide life or heating hot water to people more easily.Therefore, the heat-exchanger rig described in the present embodiment can adopt except above-mentioned concrete scheme and can reach other conventional heat-exchanger rig of the present embodiment similar technology effect.

In addition, the structure of the large stove of the utility model, the burner hearth sidewall structure being particularly made up of metal material is more suitable for suitability for industrialized production, is conducive to the popularization of dynamical particulate biomass fuel combustion techniques.

Other structures, operation principle and the beneficial effect of the present embodiment are identical with enforcement one, do not repeat them here.

The foregoing is only the schematic specific embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, is not departing from equivalent variations and the modification under the prerequisite of design of the present utility model and principle, done, all should belong to the scope of the utility model protection.

Claims

1. a large stove, includes by sidewall of the furnace body and encloses the burner hearth for fuel combustion forming, and burner hearth top is provided with the fire door that can insert large bavin pot bottom, and sidewall of the furnace body is provided with the flue outlet of deriving combustion tail gas; It is characterized in that: the feeding port in sidewall of the furnace body is provided with conducting burner hearth and cleaning door, feeding port is higher than cleaning door; In burner hearth, be provided with fire grate corresponding to feeding port place, fire grate is provided with for biomass granule fuel and concentrates the windrow region of putting; The area in described windrow region is less than fire door area; This large stove is provided with the air outlet of conducting burner hearth lower than the position of described fire grate.

2. large stove as claimed in claim 1, is characterized in that: described fire grate is extended in burner hearth by feeding port, the area of fire grate forms described windrow region.

3. large stove as claimed in claim 1 or 2, is characterized in that: described fire grate is provided with enclosing, forms windrow region in enclosing.

4. large stove as claimed in claim 2, is characterized in that: extend to the direction close in the middle part of burner hearth from feeding port in described windrow region.

5. large stove as claimed in claim 1, is characterized in that: the downward-sloping setting of described fire grate, is formed with combustion space between fire grate and the bottom of a pan.

6. large stove as claimed in claim 1, is characterized in that: described large bavin pot is the large bavin pot of round bottom, the downward-sloping setting of fire grate and be almost parallel setting with large bavin the bottom of a pan cambered surface; Or the large bavin pot of institute is flat, and fire grate be arranged in parallel and is almost parallel setting with large bavin the bottom of a pan plane.

7. large stove as claimed in claim 1, is characterized in that: described flue outlet conducting is in heated kang inner flue or chimney.

8. large stove as claimed in claim 1, is characterized in that: described air outlet is arranged on sidewall of the furnace body; Or described air outlet is made up of cleaning door; Or described cleaning door is provided with the door that can open and close, form described air outlet by this aperture; Or described air outlet is arranged on the door of described cleaning door.

9. large stove as claimed in claim 8, is characterized in that: described air outlet is provided with volume adjusting apparatus.

10. large stove as claimed in claim 1, is characterized in that: described feeding port is provided with the door that can open and close, and described granular fuel is thrown in described windrow region by feeding port.

11. large stoves as claimed in claim 10, is characterized in that: described fire grate is connected in the door of feeding port and forms drawing and pulling type fire grate, and when feeding port is closed, described fire grate extends internally and inserts in burner hearth.

12. large stoves as claimed in claim 1, is characterized in that: in described burner hearth, be provided with water jacket, water jacket is provided with cold water inlet road and hot water effluent's pipeline, and the conducting of hot water effluent's pipeline, in supplying hot water place, forms hot water cyclesystem.

13. large stoves as claimed in claim 1, it is characterized in that: described sidewall of the furnace body is made up of interlayer, described interlayer forms a water jacket, and described interlayer is provided with cold water inlet road and hot water effluent's pipeline, the conducting of hot water effluent's pipeline, in supplying hot water place, forms hot water cyclesystem.

14. large stoves as claimed in claim 13, is characterized in that: in described burner hearth, uniform ring is provided with the heat exchanger tube of multiple vertical settings; The two ends of described each heat exchanger tube are communicated in respectively described interlayer.

15. large stoves as claimed in claim 1, is characterized in that: described burner hearth sidewall is made up of metal material.