CN201363884Y - Automatic feeding civil heating stove taking compressed straw stalks as fuel - Google Patents

Abstract

The utility model relates to an automatic feeding civil heating stove taking compressed straw stalks as fuel, which comprises a stove body and an automatic feeding device, wherein the stove body mainly comprises a combustion chamber, a wind chamber, a shaking grate, a flue, a water jacket and the like, and the automatic feeding device mainly comprises a motor, a screw, a pushing groove, a limit switch and a hopper; and the automatic feeding device can realize the timing of 8 to 12 hours, and quantitatively and automatically feed. The utility model is suitable for the clean burning process of biomass fuel, has the advantages of high combustion efficiency, high thermal efficiency, low pollutant discharge, low tar production, labor saving, simple structure, low cost, broad application prospect and the like, and avoids the indoor pollution caused by tar condensation.

Description

Self-feeding and be the civil heating stove of fuel with the stalk briquette

Technical field:

The utility model relates to the biomass fuel cleaning combustion devices, particularly a kind of self-feeding and be the civil heating stove of fuel with the stalk briquette.

Background technology

Along with rise day by day coal-fired, fuel price, and the requirement of national environmental protection policy raising, the utilization of biomass fuel more and more is subjected to the attention of country.Biomass fuels such as stalk have the characteristics of carbon dioxide zero discharge in combustion process, be a kind of cleaning, regenerative resource, still, because the energy density of biomass fuel is lower, its application is very limited.

Stalk just obtains stalk briquette after the mechanical means compacting, stalk briquette is the block material of the cuboid of 30 * 30 * 70mm, and its density is at 750kg/m ³About, its caloric value reaches 3500kcal/kg, is equivalent to 70% of anthracite caloric value, and stalk briquette can use stove to finish combustion process efficiently as coal.

But, the thermogravimetric analysis result shows that the flammable composition and the coal of biomass fuel have very big difference, and therefore, the combustion process of biomass fuel and burning of coal process have significant difference.The combustible component of biomass fuel (stalk briquette) account for 70～75%, and the content of fixed carbon only has about 15% based on volatile matter (hydrocarbon of gaseous state), contains a spot of moisture content and ash content in addition.Volatile matter in the stalk briquette just begins to overflow fast, catch fire, burn with gas form about 300 ℃, and the flame that volatile combustion forms is the Chinese red that studs with black surround, the basic after-flame of volatile matter in 20 minutes; Remaining fixed carbon can also be kept burning about 5～10 minutes; Residual a small amount of lime-ash of afterburnt.

Biomass fuel can produce a large amount of tar in combustion process, tar is the general name of condensable hydrocarbons, and quantity of tar formation and chamber temperature, volatile matter gas residence time in the combustion chamber etc. are relevant.Result of study shows that about 500 ℃, quantity of tar formation is maximum in the combustion chamber, is higher or lower than 500 ℃, and quantity of tar formation all can reduce to some extent; Volatile matter gas is long more the residence time in the combustion chamber, and quantity of tar formation is few more; And if burning indoor oxygen deficiency, the tar content in the flue gas will increase.When exhaust gas temperature was higher than 250 ℃, the tar that burning is produced made the heat loss due to incomplete combustion increase to some extent with fume emission.But if exhaust gas temperature is lower than 250 ℃, tar will condensation, and combines with water and unburnt carbon granule in the flue gas, forms the liquid of thickness, sticks to positions such as flue wall, air door, causes phenomenons such as corrosion, valve bite.In addition, tar has very big peculiar smell, and human body is had certain injury.Therefore, the combustion process tissue of biomass fuel must consider how to suppress and reduce the generation of tar, and need take certain measure to prevent that tar from condensing in low temperature flue.

It is many that above burning feature has determined that the burning organizational process of biomass fuel will be than burning of coal organizational process complexity, and conventional coal stove is firing biomass fuel well at all.In the burning of coal process, leading position is occupied in the burning of coke, and the composition of biomass fuel is divided into the master with volatilization, therefore, the biomass fuel stove need be provided with the after-flame that bigger combustion space just can guarantee volatile matter, and the combustion process of living beings is paid attention to the mixed process between air and the fuel volatile matter more, is impracticable so directly apply mechanically the mentality of designing of coal stove.In addition, because the content of fixed carbon is less in the biomass fuel, therefore, the stove of burning-used biologic mass fuel can not be as coal stove long-time banking up a fire, biomass fuel is when banking up a fire, anoxic, low-temperature burning operating mode will produce a large amount of tar, significantly reduce because of exhaust gas temperature simultaneously, tar will condense in stove He in the chimney, and mixes with condensate water, what trickle is to cause peculiar smell dense in the room everywhere.So the stove of biomass fuels such as burning straw briquetting need carry out special structural design.

At present, in the vast rural area of China, stalk is mainly used in cooking, and the thermal efficiency is very low; Many times, the peasant can directly go back to the field after the burning in the fields with stalk, and this causes huge energy waste on the one hand, also causes serious environmental to pollute simultaneously.Therefore, how efficiently, biomass fuels such as stalk are fully utilized become very pressing issues cheaply.

The stalk compact technique is relative with equipment ripe, and present stalk briquette is many to be used as feed.Recent studies show that, stalk briquette has that density is higher, caloric value is than characteristics such as height, can be as the coal utilization of burning, therefore, under the overall situation that coal price generally goes up, use stalk briquette to replace coal in the rural area and carry out the direct combustion heating, have sizable market potential.Now, had the stove and accessory of some burning straw briquettings using on the market, but above-mentioned stove and accessory is still being continued to use the mentality of designing of coal furnace, and do not take into full account the combustion characteristics of biomass fuel, therefore, its efficiency of combustion is lower, and the tar growing amount is very big, and indoor pollution is serious.So,, just need the stove of design special construction if think large-scale promotion biomass straw briquette-fuel.

Summary of the invention

The utility model purpose provides a kind of self-feeding and is the civil heating stove of fuel with the stalk briquette, can overcome the defective of prior art, can realize self-feeding, be the civil heating stove of fuel with the stalk briquette.By appropriate design to stove chamber structure and heat-transfer surface, and to the structure and the parameter adjustment of automatic feeding, realized rationalization, reached the pollutant discharge amount in raising biomass fuel stove efficiency of combustion and heat exchange efficiency, the reduction combustion process and suppress the purpose that tar produces stalk briquette combustion process, flue gas and working medium (water) heat transfer process.

A kind of self-feeding that the utility model provides and be that the civil heating stove of fuel comprises: body of heater device and pay-off with the stalk briquette; Described pay-off is an automatic feeding, is positioned at a side of body of heater, is connected with body of heater material road.

Automatic feeding comprises: slowspeed machine, limit switch, control box, support, pusher groove, leading screw, plectrum, hopper and hopper cover plate.Utilize bolt slowspeed machine to be fixed on the base plate of hopper, motor the axle with leading screw between be connected by shaft joint, the pusher groove is flat in the hopper that holds stalk briquette, be responsible for transmission by a nut between pusher groove and the leading screw, when the driven by motor leading screw rotates, the pusher groove is free slippage in hopper, initial sum ultimate position at the pusher groove, the upper and lower limit bit switch is housed respectively, the limit switch utilization is bolted on the wall of hopper, and the actuating signal of limit switch is connected with relay in the control box by holding wire.The start and stop of motor are by the control of the time relay in the control box, and control box relies on screw-tightened on the hopper outside wall surface.At the leading screw end, with a pair of nut fastening "

" the type plectrum.

The body of heater device comprises: expect road, flue, damper, hot water outlet, smokestack, splasher, water jacket, secondary air chamber, porous refractory brick, fire grate handle, ash bucket, combustion chamber, shake fire grate, cold water inlet and air door; Parts such as the smoke-box on combustion chamber and top thereof, flue and material road are surrounded by water jacket, the shared wall in water jacket and combustion chamber, and promptly the outside wall surface of combustion chamber (furnace wall) is exactly the internal face of water jacket.The smoke-box on combustion chamber and top thereof is formed burner hearth, and the rocking furnace ranking utilizes bolted on the combustion chamber side wall in the bottom of combustion chamber; The combustion chamber is divided into two parts up and down, and the wall of combustion chamber the latter half lays porous refractory brick, and utilization is shaken fire grate porous refractory brick is held, and can not be offset to guarantee its locus.Combustor exit is provided with splasher; The back-end ductwork inlet is provided with the smokestack of being made up of one group of standpipe, and standpipe two ends up and down welds with water jacket respectively, and flue gas transversal flow smokestack can improve the convection transfer rate between flue gas and the water pipe.

Be a cavity below the water jacket, the bottom of cavity is the drawer-like ash bucket, and the stroke guide rail of ash bucket utilizes angle steel weldering system to form; The top of cavity is an air compartment, and air enters by air door, air door by two can move left and right steel disc form; The bottom welding water inlet pipe of a side of water jacket, water jacket welded top outlet pipe.

The burner hearth that described combustion chamber and smoke-box are formed is " protruding " font; The combustion chamber is a rectangular space, and cross section is a square, and depth-width ratio is 1.5; Smoke-box also is a rectangular space, and its cross-sectional area is 2/3 of a chamber cross section.

The wall of described combustion chamber the latter half is coated by porous refractory brick, and porous refractory brick is fastening by fire grate, and the refractory brick outside is a secondary air chamber, and auxiliary air is sent into the combustion chamber by the aperture layering on the refractory brick; The wall of combustion chamber the first half does not lay fire clay, combustor exit is the convergent outlet, the outlet of combustion chamber is provided with furnace arch, furnace nose, impel adherent the go out interruption-forming of auxiliary air that upwards flows to backflow in the combustion chamber, further mix with unburnt volatile matter, prolong the residence time of volatile matter in the combustion chamber simultaneously, make the abundant after-flame of volatile matter.

Downward-sloping 15 °～20 ° degree of furnace arch, furnace nose that described combustor exit is provided with cover combustor exit cross section about 1/2.

The hopper of described automatic feeding is tiltedly to place with 45 °～60 ° angle lappings, and the angle of inclination utilizes the revolved screw below the support to regulate, and hopper adopts inserted the connection with body of heater material road.The stalk briquette that automatic feeding utilizes the lead screw transmission principle to promote in the hopper moves on the whole, and "

" the effect drop of type plectrum drops into the material road into stove, adjust "

" relative position of type plectrum, can realize the fine setting of feeding amount.Self-feeding can be regularly, quantitatively send into fuel in the combustion chamber, can keep the smooth combustion operating mode in the combustion chamber, can effectively reduce quantity of tar formation.

The hopper of described automatic feeding adopts inserted the connection with body of heater material road, and the existing good sealing property of this connected mode can prevent that flue gas from leaking, easy disassembly again.

Described back-end ductwork is a square passageway, and damper is a square butterfly valve; Square flue adopts flange to be connected with chimney.

The hopper of described artificial feeding is a rectangular tank, and a square aperture is arranged at its bottom, can be connected with the material road of body of heater by mosaic mode, so that malfunctioning or change manual feeding when having a power failure in self-feeding.

Stalk briquette described in the utility model is the cuboid of a kind of 30 * 30 * 70mm.Because long storage time, stalk briquette may be cracked, so the utility model also comprises the biomass fuel less than above-mentioned size.

The hopper of automatic feeding is the rectangular tank of a welded steel plate, and before device started, the bottommost that the pusher groove is positioned at hopper was the lower position switch place, and hopper can hold the stalk briquette of 20～25kg; Gap between pusher groove and the hopper wall is very little, can prevent that powder in small, broken bits from blocking moving of pusher groove.The course of work of automatic feeding is as follows: slowspeed machine drives leading screw and turns clockwise, by the nut transmission, the pusher groove along bucket wall towards last translation, thereby the stalk briquette integral body on the pusher groove is moved up, when stalk briquette touch the leading screw end "

" during the type plectrum, will under toggle action, fall, enter the inclination material road of stove, rely on deadweight to slip into the combustion chamber then.The duration of self-feeding process and the time interval of twice feeding are controlled by the time relay in the control box.When the pusher groove moved to upper limit position switch, hopper emptied, and motor will no longer rotate.By the manual switching circuit, can allow motor reverse, the pusher groove returns to the lower position switch place, fills stalk briquette again in hopper; After the commutation circuit, just can realize next feeding process again.Size by the appropriate design hopper, a pipeful of stalk briquette can be kept burning 8～12 hours, so just can guarantee to keep in the combustion chamber metastable combustion conditions, chamber temperature is maintained about 800 ℃～900 ℃ all the time, and exhaust gas temperature maintains about 280 ℃～300 ℃ all the time.Compare with artificial feeding at intermittence, when using self-feeding, efficiency of combustion increases, and quantity of tar formation reduces significantly, can eliminate the harm that tar condenses and produced substantially; Simultaneously, the program that self-feeding can be cancelled night and banks up a fire has reduced hand labor.

Heating stove body of heater external form is a cuboid, and cross section is a square; Burner hearth is made up of combustion chamber and smoke-box, is positioned at the body of heater center, is surrounded by water jacket around it.The combustion process of stalk briquette is based on volatile combustion, need to guarantee fully mixing of combustion air and volatile matter, and volatile matter is stayed in the combustion chamber as far as possible for a long time, so Combustion chamber design becomes a rectangular space, and depth-width ratio is 1.5.The needed air that burns is entered by air door, carries out the air capacity adjusting by adjusting throttle opening.Stalk briquette is slipped to shaking on the fire grate of bottom, combustion chamber by the material road that tilts by deadweight, shaking fire grate is made up of one group of fire grate segment, has certain clearance between the adjacent fire grate segment, the ash of after-flame can fall into the ash bucket of fire grate bottom by this gap, and primary air enters the combustion chamber by this gap.The fire grate handle is used to adjust the angle of inclination of fire grate segment, reaches the purpose of adjusting primary air circulation sectional area; Simultaneously, also can carry out ash discharge by shaking the angle adjustment of fire grate.The combustion chamber is divided into two parts up and down, the bottom wall is coated by porous refractory brick, the refractory brick outside is a secondary air chamber, air in the air compartment is that auxiliary air can be sent into the combustion chamber by the aperture layering on the porous refractory brick, purpose is the mixed process between indoor fuel volatile matter of overheavy firing and the air, helps the after-flame of fuel volatile matter.Top, combustion chamber wall does not lay fire clay, like this can overheavy firing indoor flame and radiation and the Convective Heat Transfer between the water jacket wall.Combustor exit is the convergent outlet, and is provided with furnace arch, furnace nose in outlet, and downward-sloping 15 °～20 ° of furnace arch, furnace nose is advisable to cover outlet about 1/2.Adherent that part of air upwards that flow, that still have neither part nor lot in burning can form at the exit region of combustion chamber and backflow under the effect of furnace arch, furnace nose, further mixes with the flame that upwards flows, and can effectively prolong the residence time of volatile matter in the combustion chamber.The use of furnace arch, furnace nose has guaranteed the after-flame of volatile matter effectively, has improved efficiency of combustion, has eliminated black smoke.

Combustor exit top is smoke-box, both are " protruding " font and arrange, stalk briquette is the afterburnt in the combustion chamber, high-temperature flue gas enters the smoke-box on top, combustion chamber, the cross-sectional area of smoke-box is about 2/3 of chamber cross section, higher flue gas flow rate can be guaranteed like this, convection transfer rate can be significantly improved.Flue gas enters back-end ductwork after turning back in the smoke-box top, the flue entrance place is provided with smokestack, and smokestack is made up of one group of water standpipe, and flue gas transversal flow smokestack can effectively improve the convection transfer rate between flue gas and the pipe, the enhanced heat exchange effect.Through behind the smokestack, the flue gas damper of flowing through enters chimney; The effect of damper is to adjust flue gas flow rate.

When normal heating, stove smoke-box top utilizes end cap seal; Take off end cap, promptly can carry out cooking.Therefore the utlity model has the double duty of heating and cooking.

Under power failure or other fortuitous event, automatic feeding lost efficacy, and the utility model has been considered self-feeding and the manually switching of feeding simultaneously.Adopt inserted connected mode between automatic feeding and the stove, under the situation that self-feeding was lost efficacy, automatic feeding can be separated with body of heater, simple and easy hopper is installed, just can realize artificial feeding.The hopper of artificial feeding is a rectangular tank, and a square aperture is arranged at its bottom, can be connected with the material road of stove by mosaic mode.

Provided by the utility modelly realize that civil heating stove self-feeding, that with the stalk briquette be fuel has following distinguishing feature:

1, chamber structure has carried out particular design according to the burning feature of biomass fuel (stalk briquette), the needed primary air that burns enters the combustion chamber by the slit of shaking fire grate, auxiliary air is sent into by the aperture layering on the porous refractory brick, what guaranteed volatile matter and air fully mixes conflagration with volatile matter, also is beneficial to the after-flame of fixed carbon simultaneously.By rational furnace height design and blaze-folding corner structure design, strengthened the flow perturbation in the combustion chamber, can the efficient hardening combustion air and the uncombusted volatile matter between mixed process, effectively prolonged the residence time of volatile matter in the combustion chamber, be beneficial to the after-flame of volatile matter.Therefore efficiency of combustion of the present utility model is higher, and the experiment test result shows that its efficiency of combustion can reach more than 90%.

2, the flue gas flow rate in the favourable raising smoke-box of " protruding " font chamber design, thus the heat convection effect between high-temperature flue gas and the water jacket is strengthened; Simultaneously, the back-end ductwork inlet has been arranged smokestack, can realize flue gas transversal flow water pipe, has effectively improved convection transfer rate, and the heat exchange of flue gas and intraductal working medium is strengthened greatly.The experiment test result shows that the thermal efficiency of stove is about 75%, and its main heat loss is a heat loss due to exhaust gas.

3, automatic feeding can regularly, quantitatively be sent into stalk briquette in the combustion chamber, thereby guaranteed to keep all the time in the combustion chamber stable combustion conditions, combustion chamber temperature is basicly stable at 800 ℃～900 ℃, this has improved burning velocity on the one hand, also can effectively reduce the generation of tar on the other hand.Simultaneously, stable combustion conditions can make exhaust gas temperature maintain 280 ℃～300 ℃ all the time, has avoided containing in the flue gas tar basically and has condensed in flue, has reduced indoor environmental pollution.

4, the program that adopts automatic feeding can cancel night to bank up a fire, the stove of burning-used biologic mass fuel is if bank up a fire at night, can be because of chamber temperature is low excessively, the oxygen undersupply produces a large amount of tar, bank up a fire simultaneously and also can cause exhaust gas temperature low excessively, tar and steam will condense in a large number in flue, mix, and cause indoor pollution.Therefore, adopt automatic feeding not only can reduce the manpower work, can solve biomass fuel combustion simultaneously and produce the pollution problem that tar caused.When have a power failure or situation that automatic feeding is malfunctioning under, can change manual feeding into, keep the short time operation, and can not cause indoor temperature low excessively because of fire extinguishing.

Description of drawings

Fig. 1 is the utility model civil heating stove design sketch.

Fig. 2 is the utility model civil heating stove structural representation.

Fig. 3 is the horizontal interface schematic diagram of the utility model civil heating stove stove.

Fig. 4 is the schematic diagram of the utility model automatic feeding.

Fig. 5 is the manual feeding furnace structure of a utility model schematic diagram.

The specific embodiment

The utility model is described in detail as follows with reference to accompanying drawing:

Shown in Fig. 1 to 4, wherein: 1, slowspeed machine; 2, limit switch; 3, control box; 4, support; 5, pusher groove; 6, leading screw; 7, plectrum; 8 hoppers; 9, hopper cover plate; 10, material road; 11, damper; 12, hot water outlet; 13, smokestack; 14, splasher; 15, water jacket; 16, secondary air chamber; 17, porous refractory brick; 18, fire grate handle; 19, ash bucket; 20, combustion chamber; 21, shake fire grate; 22, cold water inlet; 23, air door; 24, smoke-box.

Heating stove body of heater external form is a cuboid, and cross section is a square; Burner hearth is made up of combustion chamber 20 and smoke-box 24; Combustion chamber 20, smoke-box 24 and back-end ductwork, material road 10 etc. are surrounded by water jacket 15.Shake the bottom that fire grate 21 is positioned at combustion chamber 20, utilize bolted on the combustion chamber side wall.Combustion chamber 20 is divided into upper and lower two parts, and wherein, the bottom side surface side lays porous refractory brick 17, and porous refractory brick 17 is shaken that fire grate 21 is held and is fastening, can not be offset to guarantee its locus; Top, combustion chamber wall does not lay fire clay, and material road 10 is communicated with the combustion chamber by one of them side wall surface.Splasher 14 is positioned at the exit position of combustion chamber 20, and 15～20 degree angles directly are welded on the internal face of combustion chamber to have a down dip.The steel pipe that the smokestack 13 of back-end ductwork inlet is 32mm by one group of external diameter is formed, and two ends and water jacket weld together about the steel pipe.Back-end ductwork is a square passageway, and damper 11 is square butterfly valves; Adopt flange to be connected between square flue and the chimney.

The outer wall of water jacket 15 utilizes welded steel plate to form; The cavity in water jacket bottom, the latter half of cavity is a drawer-like ash bucket 19, the stroke guide rail of ash bucket 19 is formed by angle steel weldering system; The first half of cavity (be ash bucket 19 and shake between the fire grate 21) is an air compartment, combustion air enters by air door 23, air door 23 by two can move left and right steel disc form, by adjusting the position of steel disc, aperture that can damper, thus realize the adjusting of intake.

At the bottom of a side of water jacket 15 welding cold water inlet tube 22; Welded top at water jacket has hot water outlet pipe 12.

Pay-off is positioned at a side at 10 places, stove material road, tiltedly places (its angle of inclination is determined according to the feeding amount) with 45 °～60 ° angle lappings, and the angle of inclination can utilize the revolved screw below the support 4 to regulate.Adopt inserted the connection between pay-off and the stove material road.

The hopper 8 of automatic feeding is a cuboid container, utilizes welded steel plate to form.Slowspeed machine 1 is by on four base plates that are bolted to hopper 8, is connected by shaft joint between the axle of motor and the leading screw 6.Pusher groove 5 is flat in the hopper 8 that holds stalk briquette, be responsible for transmission by a nut between pusher groove 5 and the leading screw 6, when clockwise rotating (or inhour rotation) when slowspeed machine 1 drives leading screw 6, pusher groove 5 (or downwards) the free slippage that can make progress in hopper 8 moves on the whole thereby promote the bed of material.In the initial sum ultimate position of pusher groove 5, upper and lower limit bit switch 2 is housed respectively, limit switch 2 utilizes and is bolted on the side wall surface of hopper 8.

The start and stop of motor are by the control of the time relay in the control box 3, and control box 3 utilizes screw fixed on the outside wall surface of hopper 8.The actuating signal of limit switch 2 is connected by the relay in holding wire and the control box 3.

The hopper of artificial feeding is a rectangular tank, and a square aperture is arranged at its bottom; Can be connected with the material road of stove by mosaic mode.Malfunctioning or when having a power failure in self-feeding, can change manual feeding into.Manual feeding furnace structure as shown in Figure 5.

Stalk briquette described in the utility model is the cuboid of a kind of 30 * 30 * 70mm.Because long storage time, stalk briquette may be cracked, so the burning that the utility model was suitable for also comprises the biomass fuel less than above-mentioned size.

Because feeding process and combustion process tissue are reasonable, and have adopted rational flue gas flow, the combustion efficiency and the heat transfer efficiency of present technique significantly improve.The utility model can be realized burning stable, cleaning under the condition of gravity-flow ventilation, and need not air-introduced machine or air blast.Utilize automatic feeding can realize self-feeding in 8～12 hours, thereby make burning more stable, efficiency of combustion is higher, and pollutant and quantity of tar formation are less, can eliminate the indoor environmental pollution that biomass fuel combustion causes, and have very strong practicality.

Claims (10)

1, a kind of self-feeding formula civil heating stove of burning straw briquetting is characterized in that it comprises body of heater and pay-off, and described pay-off is an automatic feeding, is positioned at a side of body of heater, is connected with body of heater material road;

The body of heater device comprises: expect road, flue, damper, hot water outlet, smokestack, splasher, water jacket, secondary air chamber, porous refractory brick, fire grate handle, ash bucket, combustion chamber, shake fire grate, cold water inlet and air door; Combustion chamber, smoke-box, flue and material road parts are surrounded by water jacket; The smoke-box on combustion chamber and top thereof is formed burner hearth, and the rocking furnace ranking utilizes bolted on the combustion chamber side wall in the bottom of combustion chamber; The combustion chamber is divided into two parts up and down, and the wall of combustion chamber the latter half lays porous refractory brick; Combustor exit is provided with splasher; The back-end ductwork inlet is provided with the smokestack of being made up of one group of standpipe, and standpipe welds with water jacket respectively at two ends up and down;

Be a cavity below the water jacket, the bottom of cavity is the drawer-like ash bucket, and the stroke guide rail of ash bucket utilizes angle steel weldering system to form; The top of cavity is an air compartment, and air enters by air door, air door by two can move left and right steel disc form; The bottom welding water inlet pipe of a side of water jacket, water jacket welded top outlet pipe;

The self-feeding structure comprises: slowspeed machine, limit switch, control box, support, pusher groove, leading screw, plectrum, hopper and hopper cover plate, slowspeed machine is by being bolted on the hopper base plate, motor is connected by shaft joint with leading screw, the pusher groove is flat in the hopper that holds stalk briquette, be responsible for transmission by a nut between pusher groove and the leading screw, the pusher groove is free slippage in hopper, initial sum ultimate position at the pusher groove, the upper and lower limit bit switch is housed respectively, and limit switch leans on screw fixed on the wall of hopper; The actuating signal of limit switch is connected with relay in the control box by holding wire; The start and stop of motor are by the control of the time relay in the control box, and control box relies on screw-tightened on the hopper outside wall surface, at the leading screw end, with a pair of nut fastening "

" the type plectrum.

2, civil heating stove according to claim 1 is characterized in that the described burner hearth of being made up of combustion chamber and smoke-box is " protruding " font; The combustion chamber is a rectangular space, and cross section is a square, and depth-width ratio is 1.5; Smoke-box also is a rectangular space, and its cross-sectional area is 2/3 of a chamber cross section.

3, civil heating stove according to claim 1, the wall that it is characterized in that described combustion chamber the latter half is coated by porous refractory brick, porous refractory brick is fastening by fire grate, and the refractory brick outside is a secondary air chamber, and auxiliary air is sent into the combustion chamber by the aperture layering on the refractory brick; The wall of combustion chamber the first half does not lay fire clay, and combustor exit is the convergent outlet, and the outlet of combustion chamber is provided with furnace arch, furnace nose.

4, civil heating stove according to claim 3 is characterized in that described combustor exit is provided with downward-sloping 15 °～20 ° of furnace arch, furnace nose, covers combustor exit cross section 1/2.

5, civil heating stove according to claim 1, the hopper that it is characterized in that described automatic feeding is tiltedly to place with 45 °～60 ° angle lappings, the angle of inclination utilizes the revolved screw below the support to regulate, and hopper adopts inserted the connection with body of heater material road.

6, civil heating stove according to claim 1 is characterized in that the hopper of described automatic feeding adopts inserted the connection with body of heater material road.

7, civil heating stove according to claim 1, the hopper that it is characterized in that described automatic feeding are rectangular tanks, utilize welded steel plate to form.

8, civil heating stove according to claim 1 is characterized in that described flue afterbody is a square passageway, and damper is a square butterfly valve; Square flue adopts flange to be connected with chimney.

9, civil heating stove according to claim 1 is characterized in that described pay-off is artificial feeding structure, and the hopper of artificial feeding is a rectangular tank, and a square aperture is arranged at its bottom, is connected with the material road of body of heater by mosaic mode.

10, civil heating stove according to claim 1 is characterized in that described stalk briquette is the cuboid of 30 * 30 * 70mm.

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