JPS59158903A - Combustion apparatus for granular fuel - Google Patents

Abstract

PURPOSE:To execute preheating, drying, firing, complete combustion and discharge continuously on the back fire system by a flame generated by titled apparatus itself, by juxtaposing a plurality of transfer rollers for combustion so as to interlock each other along an inclined combustion chamber and mounting sluice valves in a lateral duct connected to the upper end of the combustion chamber and a vertical duct connected to the lower end of the combustion chamber. CONSTITUTION:The upper plate 2 of an inclined combustion chamber 1 is extended from a lower part to an upper part and bent, and connected in order of an upper lateral duct 3, a lateral sluice valve 4, a chimny base section 5 and a chimney 6. A hopper 8 for fuel is fixed to the upper end section of the inclined combustion chamber 1. A combustion bed 9 is installed obliquely downward, to the lower part of the hopper 8 and a plurality of transfer rollers 14, to outer circumferential surfaces thereof a plurality of blades 12 are mounted projectingly and to circumferential surface sections thereof a large number of air holes 13 are penetrated, are juxtaposed on the combustion bed in a stepped shape and so as to interlock each other as rollers for rolling and transferring granular fuel. An ash pan 22 is installed to the lowermost section of an opening section 21 at a lower end, and connected in order of a vertical duct 23, a vertical sluice valve 24 and a chimney base section 5 from the other end. When granular fuel having a large amount of moisture is burnt, the vertical duct 23 is interrupted by the vertical sluice valve 24, and the lateral sluice valve 4 is opened fully.

Description

DETAILED DESCRIPTION OF THE INVENTION A. [Object of the Invention] The present invention relates to a combustion apparatus for a substitute fuel.

Nowadays, in the era of energy conservation, various types of alternative fuels are being considered to replace liquid fuel (light oil, 1 heavy oil), and among them, there are several types of granular solid fuels, but there are only a few, as shown in each insert F. There were 1 and inconveniences (in parentheses).

1. Wood chips for wood fuel (high moisture content, expensive compared to the amount of heat, and rough granules) 2. Sawdust (contains a lot of moisture, expensive compared to the amount of heat, and in short supply) 3. Park (bark with a lot of moisture and fine powder) 4. Waste paper (expensive compared to heat value, uneven shape) 5. Waste materials from old houses (grainy with adhesion of metal, mud, etc.) 6. Fruit peel M (large amount of water) 7. Beef pot R (moisture content) 8. Sludge (exhaust smoke with a lot of moisture causes a bad odor) 9. Sludge at the bottom of the heavy oil tank (exhaust smoke causes pollution).

Incomplete combustion due to high viscosity) 10 Rice husk (inconvenient to handle due to large volume) 11.
Coal (difficult to burn various types of combustion with lots of soot and ash) 12. Coke (low heat value and expensive) 13. Pulverized coal (expensive due to pulverized processing) Equipment for burning the following fuels are: Although there is a conventional technology, it has the following drawbacks (in parentheses).

1 Chain-type stoker (Grate driven - ;) Easy to repair or inner sheath with links (In the case of fine powder, it can pull more l than the grate, and the grate is heavy 2 Operating horsepower is large, expensive,
Using a blower fan) 2. Moving floor type stoker (chain body 7j) Same as space 1 stoker) 3
Spreading type stoker (when the granules are uneven, fine powder is suspended,
Fly ash and sinter caused by dawn make it difficult to spread uniformly () 4. Lower-type stoker (during combustion, the fire covers the fuel, causing large damage; a blower fan is used) 7. Falling type combustion device (fine powder is suspended and burns 1y fly ash).

8. Powder combustion device (due to large amount of air excitement) - A sound is generated, uniform granules are required - fine powder - L culm is large - used only for 1 coal) As above. 1. Combustion equipment for substitute granular fuels.

Although there are drawbacks to the current FIL, it is an object of the present invention to provide a granular fuel fuel/filling device that eliminates the drawbacks of the conventional FIL.

■ Is it self-generated as a fuel combustion device? , = Using the backfire method with fire and eyebrows, perform preheating, drying, master (when water molecules are depleted), and complete combustion 1 discharge in succession.

2 Evaporated water is released outside the combustion furnace by preheating.

3. Preventing pulverized fuel from falling from the combustion bed (1- year).

4. Create an automatic suction structure that burns with the optimal combustion air mixture.

5. Freely adjust the direction of the flame that hits the fuel.

6. Prevent fuel caking.

7. Roll the fuel in a thin layer to uniformly supply combustion air to each particle of fuel to achieve smokeless, pollution-free and completely continuous combustion.

84 Freely direct the flame in three directions: upwards, downwards, and above and below.

9. Crush the remaining ash, extract the gas contained in it, reduce its volume, and further block the air entering from the exhaust port.

10. Free the combustion rate.

1] Make sure that the fuel comes into uniform contact with the entire heated part (transfer roll).

12 The ladle-like roughness of the moget ranges from the scales of Kizuki Sennobu to the finer powder.

13. The combustion ash of na is black original shape.

]4. Combustion ash from wood fuels should be read in black.

15. II Prevent smoke pollution and odor.

16 Fanless combustion prevents wind ash and cinder.

17. Low horsepower operation, no noise, no failures, compact, simple, and inexpensive.

The following 1- is the purpose of this invention.

[-Configuration of the invention] A hopper for fuel is installed at one end of the upper part of the inclined combustion chamber c)
, A fuel adjustment valve is attached to the bottom of it. A combustion bed is installed from the bottom of the combustion chamber in a downwardly inclined manner.

Transfer rollers for combustion are placed at the required step-like positions.

A plurality of interlocking 1ffi) are arranged in parallel from the top, and a section is created between the bottom ends at the top to prevent the ash from falling [-1, and an ash receiving box is installed.

Connect the upper end of the upper plate of the inclined combustion chamber to the horizontal flue.

Its tip connects to the base of the chimney in the middle of the chimney. Also, a vertical flue is connected between the lower ends of the inclined fuel chamber and connected to the chimney base. , at the base of this chimney ()1.
Each flue flow h1 can be controlled individually. It is equipped with two gate valves, one for structural and one for vertical. The configuration is such that all of the transfer rollers are driven by a motor to rotate counterclockwise (opposite to the rotation of the clock hands).

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained below based on the drawings which are detailed embodiments of the present invention.

FIG. 1 is a sectional view of the entire '51 embodiment of the present invention during combustion. Upper plate (2) of the jfjj oblique combustion chamber (1)! ! ,
Bend downwards and upwards - h, as shown in Figure 17, 71 part t, F flue (5), horizontal gate valve (4), chimney base (
! 5), and the chimney (6) is joined to the chimney (6) from one end thereof. Also, 11th tilt, ``1 combustion chamber (1) E''
I'l 7jK ・) (j fee adjustment) p (7) Ij
Fix the tube (8) of the fuel tank 1 to a flat heat-resistant metal plate.

As shown in Fig. 4'χ2, it is shaped like a pipe (11) with an air supply hole (10) in its axial center, and has a plurality of blades (12) protruding parallel to its outer peripheral surface. 12) A mobile crawler (4) with a large number of air holes (15) is supported on each side of the steel frame 7-small by metal (15) from the furnace walls on both sides, and the other (1d) The change gear (16) is fixed. Cough 1'! A plurality of feed rollers (14) are arranged in parallel in a step-like manner. \Identification speed J,”,, (19)
, then rotate the engine to the left in the F direction as shown by the arrow. Then, all the transfer rollers (+4) and the floor rotate in the F direction as shown by the arrow in Figure 1. Under the floor C), install a paneural part (21), and install an ash receiving box (22) at the lowest 41ξ.
1) From the other end, read in the order of 1 box 1 flue (no) vertical gate valve (24'), and the other end of the chimney base (5) as shown in Figure 17, and here the (10) ``After passing through the two gate valve (4) 5 times, (・
It merges with the 蔕 (;偕11U]ψ) and forms the 咞 (,X) which leads to the chimney (6).

granular combustion with a lot of moisture), evening (tangyoin which burns the state i9A, L
4. With the vertical gate valve (24). Shut off the filtration flue (23) and fully open the 1st side gate valve (4). Next, when the motor (17) is started, each transfer roller (14) moves as shown by the arrow.
F self-feed interlocking rotation. Next is Shi, Po Pa, (S)
Add granular fuel and particles to the tank. Then, by the fuel adjustment valve σ).

A predetermined amount of fuel is supplied to the transfer port (14) V) at the lowest point, and when it reaches the transfer port 14) at the bottom of the first station through 0 times and 1 wide as shown by the arrows in Figure 1, at that time the motor (
Stop the rotation of +7), use petroleum etc. as an ignition agent from outside the furnace, and ignite it at the bottom.

When the large sword moves upwards on the entire surface of the fuel, the motor (1
7) has been re-engineered and Umesuke is now in continuous combustion mode.

In the third embodiment, the fuel particles are rough.

(similar to wood chips) or water-rich fuels,
The device is set so that silent ignition occurs (t!, 1< in Fig. 3), and when ignition is completed in a short time, the injection is started in the middle. However, the combustion rate of coarse fuel is lower than that of fine powder, so the combustion rate is lower than that of fine powder.
・It is a sea lion that burns extremely vigorously. In case of conflict.

[In the combustion bed C of the third embodiment in Fig. Σ4, a plurality of air holes (26) are installed through the holes (no leakage because there is no fine powder). A plurality of transfer rollers (14) of the fourth embodiment are installed in parallel on the combustion bed (9).In this process, the number of rollers installed in parallel is reduced and a gap is created between each transfer roller (14). , a combustion reservoir (2)) was installed in it, and the implementation was suspended.
1,2≦1. Figures 4 and 5 show complete combustion of one granular coarse fuel (wood chips). In this case etc.

The 7-fold roller (14) of the fifth embodiment shown in FIG. 6 has a vibrator shape (lζ) without air holes (13) in the 9-sided part.

The pressure inside the inclined combustion/dawn chamber (1) has increased due to combustion!
I:ji, make it a 1-4 configuration to prevent smoke from blowing out of the furnace from the air hole (15).

The 2-6 embodiment shown in Fig. 7 has a lower stage of the 1-po bar (8) as a means for supplying the combustion gas 8.The stirring device (28) is fixed and the popper ( 8) Stir the burning books inside to prevent them from falling in the direction of the burner. The wing-shaped tip and the inner wall of the popper are made close to each other and disturb the brick ρ1 that is fixed to the inner wall.Also, there is a concave in the fuel supply device N (29) installed below. ) 11; If the fuel to be put into the package is granular or rough (wood chips), the inner wall and concave gl: (
30) In some cases, the fuel pieces get caught in the rod-shaped blades or protrude and become clogged, causing the inconvenience that the stirring device +:ff (Fl+) stops.
In addition to 1), the ring-shaped part of the spring acts as a buffer, and the first floor stirring device (sword) is completely transferred, keeping the smell at -91 degrees and preventing jamming. Yes +41; i configuration. In the case of a deep-shaped hopper (8), multiple sets may be placed in the F direction.
The fuel supply device a of the seventh embodiment (29) has four parts (30) on the outer peripheral surface of the drum.
Set multiple articles, and set the 8th actual MI of Figure 7 to this ↓ Example: 1.
Turn 2) with No. 1 (55) as the base point, turn t + L, and the previous statement 1. It is a structure in which the lead supply bank is adjusted in the gap between the double eave and the double drum.

The ninth embodiment shown in FIG.
At 1), a plurality of parallel blades (12) are protruded from the outer circumferential surface of the roller, and the mechanism engages with the blades (12) of the adjacent transfer roller (14) and rolls under pressure with a spring (35).
It is f. The square material (rolling down Zomi roller (14)-L during sintering F ore caking and becomes small aggregate-like lumps, and if it is discharged as it is, the volume of ash will be large, so dispose of it) Because of this, it is crushed and put into the ash receiving box (row) from the ash drop opening (36).

In addition, by this crushing, the unburnt residue contained in the viscous ash is squeezed out and burnt.
V-built 6 o, rice husk, wood solid y;・d・yaki 1-
(When obtaining 1-8 q of ash (fire) after burning in its original shape, the spring (35) of the gradient pressure means is set in motion to assist in rolling the roller (54). And.

The ash receiving box (22) is tightly fixed to the lower part (21) of the tilted twisting/burning chamber (1) in Figure 9. The combustion residue generated from the sky (exhausted) is prevented from escaping to the outside, and the incoming air from outside the outlet is restricted. , Adjust the amount of air that enters the page arbitrarily by adding the amount of air (37);
'・It is a spear structure that does.

[Go to P in Figure 10] In the first embodiment, female threads are formed at both ends of the air supply hole (10) of the 9-tooth Z feed roller (14), and a deep groove is formed on the inside and a shallow groove is formed on the outside. Air supply adjustment plug (38)
Make a male screw γ1 on the outer periphery of the J and screw it together, and adjust the amount of air to the combustion state depending on the screwing rate.
j′l. All of these are installed on each transfer roller (14).

The twelfth embodiment shown in FIG. 11 is based on the top plate G in the inclined fuel chamber (1). ) is curved downward and one flame rolls up and down on the upper transfer roller (14) g,! 1. S1
Hit it directly! - downward curved structure and 13th embodiment i, 4 upper plate (2) ノ J ii fiii, i part d: Turn i',, j; · with the r sound (,59) as the base point Equipped with a pipe-shaped flame direction adjustment weir (40)? * is R+1 to adjust the direction of the flame.

QH in Fig. 12: 14 Example is (yellow gate valve (4)
Vertical gate valve (24) 27r4': operation, 1 step LZ
4, and freely change it to -1 in three directions: on the other hand, downward, and up and down.

Flame II that rotates around T# (41)! 71 straight plate (42).

Bottom of horizontal flue ψ) of inspection base 6), vertical flue (23)
It is a mechanism installed at the corner where the double cloth ☆11″1: touches.

In the 15th embodiment shown in FIG. 13, a horizontal flue (3) is arranged in the seventh part (43) of the inclined combustion chamber (1) (ii+, t,
, the human condition adjustment board (42) is installed at the chimney base (5).
l'y + watery and -1: p J, 5.・) It is a structure that burns only with a burning sensation.

The 16th embodiment shown in Fig. 14 is as follows: 1) I-layer twisting chamber (1)
Below @1) A vertical flue (23) is placed at the mouth (21) (,
5, i L, fire gage i adjustment plate (42
) is equipped with a fuel with low moisture content and a fast ignition speed, which burns with only downward humanity? It is.

The air supply hole (IO) in the lower axial center of the moving roller (14)
), oil is introduced into the fuel via a pipe, and the valve (45) is used to adjust the dripping to the circumferential surface γ, I; Descending (11
It is constructed.

This combination excludes the parts of the fuel injection system r, )j+ in the front arrangement of FIG. 3 in the second embodiment.

+゛;: Figure 16 shows 9 rotation transmission device v, 0) Cross section 7'71
It is.

Remove the bell l-(48) from the motor (17) with foil, change the car, and remove it.

A speed machine (19), a Cheno (λ), a stirring device (28), and seven reverse rollers (14) are equipped with i and p-ij. For each change gear (16), add a cheno (sword) to i'7.
As shown in Figure 16, the forces are linked in sequence. In addition, for fuel with a slow combustion speed, combustion is delayed by 9 rotations at the above-mentioned 2.

The fuel supply device (29) is connected to a chain (16) (ζ) that is firmly connected to the chain (on the side).The rotation speed of this fuel supply device (29) changes depending on the nature of the fuel. There are also ;, :, and 2, which are performed by the exchange means of Chenogya (16).

However, the peripheral speed of the feed roller (14) will be downward. Since the volume of fuel due to combustion will decrease, the structure is such that the diameter of the Cheno gear (16) is made large and the peripheral speed is reduced. .

17 (-11,:S: flue 6) and the vertical flue (δ
) or connect each horizontal gate valve (4) and vertical gate valve (24) to the point where it contacts the chimney base (!5) jll=k L
, each operation changes the flow of n14 ii-:, i, and the flame is changed to the side, the downward direction, or the downward direction of L depending on the properties of the fuel.

C. Next, the combustion state of the fuel according to the present invention will be explained.

■For fuels with a high moisture content (liquid fuels - sawdust, parsley, and fruit peels).

(green angle R, sludge, etc.) A Contact surface of fire gun 1 - Radius 1 of fuel supply adjustment valve or fuel supply adjustment plate, supply device A. Shift σ't] - Ra7's rolling wheel)! Fuel inlet on all sides of upper part Flame direction - upward (by flame adjustment plate) Tonneau 1. j
' (jζζA small amount to promote vigorous combustion depending on the properties of the material) C Flame proximity: fire, opening direction dIM depending on the control weir
Fire: Akatsuki no 11 Old Order l Fire/I Preheating surface by lPi One side of the hopper, the precipitate supplied from the supply device is 1 Some of the transfer rollers are multiple? , c7) ;l′:'knee F charge surface.

2 Moisture evaporation history Ffj 7fG in the combustion chamber! From the flue, smoke comes out. 1. Air holes and air supply holes in the several shaft centers of the upper part of the transfer roller. ') - to exit the furnace.

3. Ignition, combustion - Fuel 1 is applied in a thin layer on the transfer roller! ,! i1 is received by the blades of the transfer roller, then sent to the lower transfer roller, and sequentially transferred downward. During that time, the heating material of the transfer roller is scorched, and the air is ignited by the fire from below, and the air comes out from the air hole in the shaft center of the feed roller and the many air holes between each wing. As the speed of combustion increases, the heat of the fire increases, and the amount of air automatically increases to achieve complete combustion. Even if the fuel caking occurs during combustion, the circular shape of the outer periphery of the transfer roller and the falling of the fuel will cause it to break into small pieces, facilitating combustion. Furthermore, the fine fuel that has leaked into the shaft center of the transfer roller turns into a N2 flame, which becomes a source of fire, and continues to ignite as it rotates.

Furthermore, as you move downward, the combustion weakens.

(Bi) (Bi1 is caked and forms small aggregates.

Press the air hole to prevent air from entering. Next The ash crushed by pressurized means becomes charcoal-like. The ash becomes granular and the ash is caught in the box. Since combustible gas is generated in the rises from the back side of the cylinder and ignites in the combustion chamber. There are means to burn both for a long time.

4. Combustion speed - speed changer deceleration (change the rotational speed with the manual speed change mechanism to set the combustion speed freely, and also adjust it with the fuel supply adjustment plate.

2 Fuel with low moisture content (fuel with fast ignition speed - waste paper 1 heavy oil sludge, rice husks, etc.) A. Fire/eye contact surface 1 Lower part of multiple transfer rollers, + Full fuel opening Direction of flame - Downward (by flame adjustment plate) C Flame proximity - small part 2 Combustion order 1. Preheating by flame - small ↑71S min 2, moisture evaporation route - exits to chimney with flame (small amount) 3. Ignition, combustion The fuel is ignited by the fuel on the lower transfer roller 10, and the center of the flame moves to the fuel on the upper transfer roller 10, which burns the entire surface and increases the combustion rate.

4. Burning speed...Transmission, fuel supply adjustment plate.

Second, as an example of the use of the granular fuel combustion device of this invention 1 Boiler combustion chamber 2.Hot air generator 3. Heating stove 4 For dry heat source (Used as follows.

"Effects of the Invention - 1. This invention has the above-mentioned structure and operation. 2. The 17 clauses that are the object of the invention are solved in 15 ways as described in the structure section of this invention, as in F Ne, and have achieved effects.

1. Continuous drying and operation of self-generated flame with backfire method.

Indicates ignition and combustion.

2. The source water was discharged out of the furnace through the horizontal flue and the axial center of the upper transfer roller.

3. Combustion bed with no air holes prevents the pulverized fuel from falling. 4. The transfer roller is shaped like a pipe with air holes, and is transferred around the outer circumference of the pipe with many air holes to create an automatic suction structure for optimally mixed combustion air. Start combustion.

5. Is fuel available at the Humanity Direction Adjustment Weir? , = I was able to freely obtain the direction of humanity.

6. The transfer row was used to prevent the caking of the fuel.

7. The fuel is rolled in a thin layer by the transfer roller, and combustion air can be uniformly distributed in each particle of the fuel at all times, making it smokeless.
Complete combustion without pollution.

8. The direction of humanity is freed by the fire/il'f adjustment board. (Three directions: upper, lower, and lower) 9. The ash receiving box was tightened, the ash was crushed, the remaining gas was extracted, and the volume of the ash was reduced to adjust the incoming air.

]0. By adjusting the rotation speed with a transmission, the combustion rate can be freely controlled.

11. The fuel came into uniform contact with the heated transfer roller.

12 Complete combustion of everything from wood chips to fine powder.

13. Make the springs of the ii-j cutting stages weaker and tighten.

Air is blocked from entering the ash receiving box, and the ash from the paddy bong is turned into a black original lamp and top ash, which is then used as fertilizer. It was also used as a deoxidizing agent for iron manufacturing.

14. Air was blocked from entering the ash receiving box, and the solid wood material was burned as black ash and used as a raw material for smoked charcoal and charcoal.

15. By completely burning in the shade and incorporating an absorbent, the pollution odor caused by sludge, sludge, and smoke from beef pots is prevented, and the burnt ash becomes a tough improver.

16. The wind, I, (, fan-less combustion suppressed the scattering of Xingu, and the stirring device a, fuel supply device J, + forward rotation rollers, etc. were able to be operated at a fixed horsepower.

No sound...Since there is no fan other than the wood knob and fuel, I made no sound.

No failures, compact, simple, inexpensive...low horsepower drive, simple structure, and therefore compact and inexpensive.

1 ton (1 ton of rice) on the edge of the land (sometimes paddy by-product of farmers (easily crushed to reduce the amount) 111 left in the forest to rot and thinned wood from plantations) made into chips) of old houses Seat fee (y
Pulverized dust (remove the fibers and use the remainder), sludge from multi-box tanks (adjust viscosity with an absorbent), raw chicken manure (adjust moisture with an absorbent) sludge (
Adjust moisture with absorbent) 9 grade pollution.

The occurrence of bad odors can be prevented by mixing zeolite, and
21 peels, seeds, etc. are used as a heat source, and the ash of rice husks, raw chicken manure, etc., which is completely unthinkable with conventional technology, is used as a soil conditioner and fertilizer, and wood fuel and fruit peel seeds are used as a heat source. The use of ash such as smoked charcoal and bean charcoal to prevent pollution and bad odors is a great way to kill two birds with one stone.

Fig. 2 is a sectional view of the transfer roller. Fig. 3 is a sectional view of the burner installed. Fig. 4 is a sectional view of the combustion bed with air holes. Fig. 5 is a sectional view of the combustion chamber with a combustion reservoir between the transfer rollers. Figure 6 is a sectional view of the transfer roller without air holes. Figure 7 is a sectional view of the agitation device (spring hamura), fuel supply device, and fuel supply amount adjusting plate. Figure 8 is the position of the lj pressure means of the pressure 1 transmission roller. Figure 9 is a sectional view of the tight installation of the ash receiving box, Figure 10 is a sectional view of the air supply adjustment plug, and Figure 11 is a sectional view of the downward curvature of the -1 plate and the fire/lateral adjustment weir. Figure 13 is a cross-sectional view of the horizontal flue only Figure 14 is a cross-sectional view of the vertical flue only Figure 15 is a cross-sectional view of the oil storage tank for young people Figure 17 is a cross-sectional view of the horizontal gate valve and the vertical gate valve. Valve 8 - Hopper 9 - Fuel bed 1o - Air supply hole 11
・Pipe shape 12・・Feather 1'5・Air hole 14・・
Transfer roller 15-・Metal 16 Changer 1
7. Motor 18. Bell I. 19. Reducer with gearbox 20. Chain 21. End opening part 22
・Ash receiving box 23 Vertical flue 24...Gate valve on 4i
25 Burner 26...Air hole 27 Combustion/burning reservoir 2B...-Voice...No. 1 64...Normal rotation roller
35...Spring 36 ・Ash falling f-'i 37
・Air adjustment port 38 Air supply adjustment plug 39 Tif
40 Fire fa Direction l#IIN N 41. ,.

T-knee 42 Flame adjustment plate 43... 1" section
44.Oil storage link 45..from the valve ]2 A10 Figure 2 Figure 3 Figure 4 Figure 5 Figure 5

Claims (1)

[Claims] 1. Combustion bed (9) in inclined combustion chamber (1) Along J2, 1 granular fuel transfer roller ( 1
4) are interlockably arranged in parallel to the combustion bed (9) 7 in a stepwise manner, and the transfer roller (14) is provided with an air supply hole (
A plurality of parallel blades (12) are provided protruding from the outer circumferential surface of each pipe-shaped pipe (11) having a diameter of 10).
) A large number of air holes (13) are provided through each side of the slanted fuel chamber (1), and horizontal flues (
3) A vertical flue (23) is installed at the base of the chimney (5) where the two flues merge, with a horizontal partition that allows the flow rates of the horizontal flue (b) and vertical flue (23) to be controlled individually. A granular fuel combustion device characterized by comprising a valve (4) and a vertical gate valve (24).