JP2000055307A - Synthetic solid fuel combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a combustion device, capable of effecting complete combustion of synthetic solid fuel, produced from classified recovery refuse and containing much amount of ash constituent, efficiently without leaking any combustion gas or unburnt gas. SOLUTION: In a synthetic solid fuel combustion device, burning synthetic solid fuel on a hearth 1b, the hearth 1b is constituted of a first hearth 1b1, positioned at the upstream side of supplying direction of the fuel, and a second hearth 1b2, positioned so as to be neighbored to the downstream side of the first hearth 1b1. A fuel supplying means for sending out the synthetic solid fuel into a direction from the first hearth 1b1 to the second hearth 1b2 is arranged on the side peripheral wall of the first hearth 1b1 side and, further, a first plate member 94A, reciprocated to send out ash constituent or fuel on the first hearth 1b1 to the second hearth 1b2, is provided while a dam 17 is provided above the first hearth 1b1 near the second hearth 1b2 so as not to bother the sliding of the first plate member 94A. Further, a multitude of air passing ports 97 are formed on at least the first plate member 94A so that combustion air, supplied from the hearth 1b1, can be passed into a combustion chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic solid fuel combustion apparatus, and more particularly, to a synthetic resin which has been disposed of.
The present invention relates to a synthetic solid fuel combustion apparatus that is particularly suitable for burning synthetic solid fuel produced by compression molding of wood waste and paper waste.

[0002]

2. Description of the Related Art Conventionally, a combustion furnace having a fixed hearth completely burns a combustion product together with a supply of combustion air, and
It is an issue to effectively discharge combustion ash generated at that time, and several proposals have been made for that purpose. For example,
A combustion furnace of the type in which a solid fuel is charged on a grate to form a fixed bed and burn on the hearth, wherein a combustion stirrer capable of supplying combustion air simultaneously with stirring of the fixed bed is provided. It is known that high-load combustion is possible by providing a rotary stirring means capable of supplying air. However, the ash that accumulates on the hearth drops naturally to the furnace bottom through the air holes of the grate, and the air holes may be clogged with the ash, resulting in an insufficient supply of combustion air.

In order to effectively remove ash on the grate, the hearth is inclined with respect to the horizontal plane, and a plurality of projections are projected on the hearth to burn on the side walls of the projections. A fixed-bed combustion furnace (actually disclosed in Shokai 59) in which an air inlet is formed and a pusher for ash extruding having a convex portion loosely fitted to the convex portion is provided so as to reciprocate along the hearth. -5523
No. 2) or an intermittent reciprocating motion of a sliding plate which can slide closely along the upper surface of the hearth,
The clinker generated after the combustion of the pulverized coal was crushed and the thickness of the pulverized coal layer was equalized, and at the same time, the clinker and the combustion ash were discharged outside from the combustion ash outlet through the water in the sister tank. Fixed-bed combustion furnace
No. 47928) is also known.

As described above, in a combustion furnace of a type having a pusher or a sliding plate for pushing out ash, ash is reliably discharged from a combustion ash discharge port, and it is possible to avoid clogging of an air supply hole of a grate. In this type of combustion furnace, the combustion furnace has a positive pressure due to the balance between the blowing and blowing of the combustion air, but the combustion ash as described above is discharged to the outside via the water in the sister tank. In the ones that do, the combustion ash outlet is basically sealed with water,
The combustion gas does not leak to the outside.

[0005] However, the hearth surface of the combustion chamber in the conventional fixed bed type combustion furnace is basically one continuous flat floor, and is positively activated by the ash pushing means such as the pusher or the sliding plate. When the combustion ash is extruded, the unburned portion is likely to be discharged from the combustion ash outlet together with the ash.
Discharging unburned components to the outside together with ash wastes combustion energy, not only lowering combustion efficiency, but also burning outside the furnace may cause a fire. In order to prevent danger, it is required to provide a safety device such as a water spray device near the combustion ash discharge port, which causes an increase in cost. 5-4
In the case of the combustion furnace of the type described in JP-A-7928, the combustion ash is cooled by passing through the sister tank, and there is little danger of external combustion, but when using a fuel with a high ash content, the ash floats on the water. However, since it absorbs water and hardens, the combustion ash may not be easily discharged to the outside.

[0006] In recent years, garbage has been separated and collected in each municipality, and the combustible waste (wood waste, paper waste, resin material, etc.) that has been collected is pulverized and then mixed at a fixed rate to obtain solid fuel. In many cases, a so-called synthetic solid fuel is compressed and reduced in volume by a compression molding machine to obtain a so-called synthetic solid fuel, and effective use of the synthetic solid fuel produced in this manner is required. However, since the synthetic solid fuel produced in this manner may generate more combustion ash than coal fuel or the like, it can be effectively used in the above-described conventional fixed-bed combustion device. Combustion is difficult, and the development of a combustion furnace suitable for this kind of synthetic solid fuel is required.

[0007] Japanese Patent Application Laid-Open No.
No. 73214 discloses a synthetic solid fuel combustion apparatus configured to burn a synthetic solid fuel in a hearth, wherein the hearth includes a first hearth located upstream in a fuel supply direction and the first hearth. A second hearth positioned lower than the first hearth on the downstream side of the hearth, and a second hearth from the first hearth on the side peripheral wall on the first hearth side. Fuel supply means for sending out the synthetic solid fuel in a direction toward the hearth of the fuel cell is disposed on the second hearth for ash removal which reciprocates in a direction intersecting the direction in which the fuel is supplied by the fuel supply means. A plate member is provided, and further, an ash discharge port is provided on one side peripheral wall corresponding to the moving direction of the ash extraction plate member. .

[0008] According to this synthetic solid fuel combustion apparatus, even when a synthetic solid fuel containing a large amount of ash is burned, complete combustion of fuel components and removal of ash outside the furnace can be reliably performed. Both high combustion efficiency and high safety can be satisfied at the same time. In addition, since the ash can be reliably discharged to the outside without leaking the combustion gas or the unburned gas outside the device, high combustion efficiency can be continuously achieved. Further, it becomes possible to continuously burn a synthetic solid fuel produced based on household waste separated and collected for resource reuse with high combustion efficiency for a long time.

[0009]

In the above-described synthetic solid fuel combustion apparatus, the fuel is continuously delivered to the first hearth by the fuel supply means and burns there. While burning, the previously supplied fuel is gradually pushed to the downstream side by the subsequently supplied fuel, and when reaching the downstream end position of the first hearth in the fuel supply direction, the second furnace It is designed to fall on the floor.

In the course of conducting many combustion experiments using the above-described synthetic solid fuel combustion apparatus, the present inventors have found that fuel burning on the first hearth or ash after combustion is continuously supplied by the fuel supply means. That it may not be sufficiently extruded by the subsequent fuel that is sent out, and that, depending on the type of synthetic solid fuel, it may happen that ash deposits on the first hearth; Since unburned fuel may remain in the fuel delivered to the second hearth by the subsequent fuel, and the unburned fuel is usually in a lump, complete combustion on the second hearth may occur. It has been experienced that the ash extraction plate member may be discharged from the ash discharge port without being burned.

An object of the present invention is to provide an improved synthetic solid fuel combustion apparatus which has solved the above-mentioned phenomena which can occur in the above-mentioned synthetic solid fuel combustion apparatus already proposed, and more specifically. In the first method, the unburned fuel and ash on the first hearth are surely sent to the second hearth, thereby preventing ash from being deposited on the first hearth. Even when unburned fuel is sent out from the first hearth to the second hearth, the synthetic solid fuel combustion ensures that the unburned fuel is completely burned on the second hearth. To get the equipment.

[0012]

According to the present invention, there is provided a synthetic solid fuel combustion apparatus for burning synthetic solid fuel in a hearth, comprising: The floor is composed of a first hearth located on the upstream side in the fuel supply direction and a second hearth located adjacent to the downstream side of the first hearth. Fuel supply means for sending out synthetic solid fuel from the first hearth to the second hearth is disposed on the side peripheral wall, and ash and the like on the second hearth are supplied to the outside of the combustion chamber on the second hearth. A reciprocating second plate member is provided for feeding the fuel to the apparatus, and further, an ash discharge port is provided on one peripheral wall corresponding to the moving direction of the second plate member. In the first hearth, the ash or the fuel on the first hearth is supplied to the second hearth. The back and forth movement for feeding to 1
And a first member near the second hearth.
A weir is provided above the hearth so as not to hinder the sliding of the first plate member, and at least the first plate member of the first plate member and the second plate member is provided with a weir. A large number of air passage holes are formed so that combustion air can be supplied into the combustion chamber.

In the present invention, a fuel (eg, a synthetic solid fuel as described above) is continuously delivered over the first hearth, preferably by a fuel supply means such as a screw conveyor, where the hearth is disposed. And it burns by the combustion air supplied from the side peripheral wall. While burning, the previously supplied ash or fuel on the first hearth is sent out to the second hearth by the reciprocating first plate member and is gradually pushed downstream. The length of the first hearth is desirably set to such a length that the combustion is almost finished while the fuel used moves downstream with the combustion, and of course, even if the length is longer, Good. With such a setting, the fuel in the first hearth has almost finished burning and almost ash when it moves to the second hearth. When the fuel is sent from the first hearth to the second hearth in that state, it is avoided that ash stays on the first hearth and is deposited.

Depending on the type of fuel or changes in the combustion environment, there may be cases where unburned fuel remains in the fuel delivered to the second hearth. However, since a weir is provided above the first hearth near the second hearth so as not to hinder the sliding of the first plate member, the weir is formed by the first hearth and the weir. Only the ash or the fragmented fuel that passes through the opening is discharged to the second hearth. That is, as a result of the unburned mass pushed by the first plate member being finely divided by the weir,
The only unburned portion that is sent to the second hearth is the fragmented fuel, which unburned portion is generated by the heat generated by the flame (due to the combustion on the first hearth) passing above the second hearth. The combustion is promoted by the combustion air supplied from the side peripheral wall, the hearth, and the ceiling, and the unburned portion is almost completely burned.

In the present invention, a large number of air passage holes are formed in the first plate member and preferably in the second plate member so that combustion air can be easily sent into the combustion chamber.
Normally, combustion air from the hearth largely affects combustion as primary air. However, since a large number of air passage holes are formed in the first plate member and preferably in the second plate member, the number of air passage holes is increased. Even when the first plate member (and the second plate member) reciprocates on the hearth, the supply of combustion air from the hearth to the combustion chamber is not hindered, and a desired combustion state is always maintained. can do.

In a preferred embodiment of the present invention, the first
At least the second plate member of the first plate member and the second plate member is composed of a plurality of plate members positioned in parallel with each other, and each plate member can reciprocate in different phases. Has been. Thereby, it is possible to avoid a situation in which all the air holes formed in the hearth are simultaneously covered by the first plate member and / or the second plate member, and the combustion air from the hearth to the combustion chamber can be prevented from being emitted. The supply is more stable and the combustion can be more reliably prevented from becoming unstable.

The ash deposited on the second hearth is pushed out toward the ash outlet by the reciprocating second plate member advancing along the upper surface of the second hearth, and is discharged from the ash outlet to the outside. Is discharged. Since substantially no unburned components are present in the discharged ash, a high combustion efficiency can be obtained as a combustion furnace, and the danger such as an external fire can be avoided.

[0018]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view partially illustrating a cross section of an embodiment of a synthetic solid fuel combustion apparatus according to the present invention, and FIG. 2 is a schematic cross section illustrating a primary combustion chamber portion on a first hearth of the apparatus of FIG. FIG. 3 is a schematic sectional view illustrating a secondary combustion chamber portion on a second hearth of the apparatus of FIG. 1, and FIG. 4 is a top view partially illustrating the apparatus of FIG.

The furnace body A includes a ceiling 1a made of a refractory material,
It has four circumferential side walls 1c to 1f and a hearth 1b cooled by cooling water, and has a combustion chamber S therein (primary combustion chambers Sa and 2).
The next combustion chamber Sb) is formed. The ceiling 1a includes a first ceiling 1a1 and a second ceiling 1a2 located lower than the first ceiling 1a1, and the length of the first ceiling 1a1 is: The length is set to be substantially the same as the length of a first hearth 1b1 described later. The hearth portion 1b is composed of a first hearth 1b1 and a second hearth 1b2 positioned lower than the first hearth 1b1, and includes a first hearth 1b and a second hearth 1b.
1, 1b2 are provided with a large number of air holes 2b for supplying combustion air.

Of the four side walls 1c-f, two opposing side walls 1c and 1d are also provided with a large number of air holes 2d for supplying combustion air, and the other side wall 1e is provided with combustion gas (combustion gas). A (flame) burner nozzle 3 is provided as an ejection port. A tertiary air jacket 3a is formed around the burner nozzle 3, and a tertiary air supply air hole 2c is provided in the burner nozzle 3 portion.

The combustion chamber S includes a primary combustion chamber Sa corresponding to an upper space of the first hearth 1b1, and a secondary combustion chamber Sb corresponding to an upper space of the second hearth 1b2. The combustion gas (combustion flame) in the secondary combustion chamber Sa passes through the secondary combustion chamber Sb, and is further mixed with the tertiary air in the burner nozzle 3 and ejects to the outside. Also, the first ceiling 1a
1 is provided with an air supply port 4 which opens directly into the primary combustion chamber Sa. The air supply port 4 is connected to a pipe 51 connected to a combustion air blower 50, and the air supply port 4 is ignited. A burner 5 and a frame sensor (not shown) are arranged.

The side wall 1e where the burner nozzle 3 is located
The fuel supply port 6 is provided on the side wall 1f facing the fuel supply at a position slightly higher than the floor surface of the first hearth 1b1, and the fuel supply port 6 is connected to the fuel hopper 10. The discharge end side of the screw conveyor 11 is connected, and the synthetic solid fuel 12 in the fuel hopper 10 passes through the fuel supply port 6 from the screw conveyor 11 and the combustion chamber S of the furnace body (the primary combustion chamber Sa). ). The ceiling 1a, the hearth 1b, and the four circumferential side walls 1c to 1f are covered by an air jacket 7, and a pipe 51 connected to a combustion air blower 50 communicates with the air jacket 7. In FIG. 1, M1 is a motor for driving the screw conveyor 11.

An opening 15 for a first plate member 94A, 94B, which will be described later, is provided below the fuel supply port 6 on the side wall 1f, and a pair of sprockets 91a is provided outside the opening 15. , 91b, a rotary transfer device 90 composed of two endless chains 92, the lower surface of the endless chain 92 is set at a position substantially equal to the height of the upper end surface of the opening 15, and two sets of parallel transfer devices are arranged in parallel. (See also FIG. 4). On the lower surface side of the endless chain 92, first plate members 94A and 94B reciprocating on the first hearth 1b1 have their outer ends fixed to the endless chain 92 by a fastener (not shown). It is attached in a posture fixed by. A guide plate 95 is disposed below the first plate members 94 and 94B, and a motor M4 for driving the endless chain 92 is attached to the back surface of the guide plate 95.

The first plate members 94A and 94B are rectangles of the same size, the width is substantially half the width of the opening 15, and the length is longer than the first hearth 1b1. It is said. Further, a large number of through holes 97, 97 as air passage holes are formed on the entire surface of the first plate members 94A, 94B, and at least both ends in the longitudinal direction thereof have bent pieces 98 downward. The lower end of the bent pieces 98, 98 slides on the first hearth 1b1.

The first hearth 1b1 near the second hearth 1b2
A dam 17 capable of forming an opening 16 through which the first plate members 94A and 94B can pass while sliding is supported and mounted on two opposing side walls 1c and 1d. The weir 17 can be made of a firebrick, heat-resistant steel, a water-cooled square pipe, or the like. The first plate member 94A,
94B is such that when the motor M4 is driven to rotate the endless chains 92, 92 in a forward direction and a reverse direction by a control mechanism (not shown), the end thereof is in the position of the opening 15 or a position slightly retreated from the opening 15. , Reciprocating between a position extending beyond the opening 16 formed by the weir 17.

At a position corresponding to the second hearth 1b2 on the side wall 1c and at the height of the upper surface of the second hearth 1b2, an ash discharge port 20 is provided over the entire width of the second hearth 1b2. I have. The ash discharge port 20 extends through the air jacket 7, and a casing 53 is attached to the end of the ash discharge port 20. A screw 54 for discharging ash is provided at a lower end of the casing 53. The ash discharging screw 5
The discharge side of 4 is open to an ash receiver 60 via a conduit 55. The pipe 55 is provided with a rotary valve 55a, which has a function of sealing a combustion gas leaking from the ash discharge port due to a positive pressure in the furnace. M3 is a motor for driving the ash discharging screw 54.

An opening 25 having the same size as the ash outlet 20 is also provided on the side wall 1d facing the side wall 1c where the ash outlet 20 is provided.
The opening 25 also extends outward through the air jacket 7. As shown in FIG. 3 and FIG.
Outside, a rotary transfer device 40 composed of two endless chains 42 wound between a pair of sprockets 41a and 41b adjusts the lower surface height of the endless chains 42 to the height of the upper end surface of the opening 25. Two sets are provided in parallel at substantially the same position.

On the lower surface side of the endless chain 42, a posture in which the outer ends of the second plate members 44A and 44B are fixed to the endless chain 42 by a locking member (not shown) is attached. I have. The second plate members 44A, 4A
4B, a guide plate 45 is disposed below the guide plate 4B.
A motor M2 for driving the endless chain 42 is attached to the back surface of 5. The second plate member 44
A and 44B are rectangles of the same size, the width is substantially half the width of the opening 25, and the length is longer than the length including the air jacket 7 of the combustion furnace.
Also, a large number of through holes 47, 47 as air passage holes are formed on the entire surface of the second plate members 44A, 44B,
Furthermore, at least both ends in the longitudinal direction are bent downwards 48, 48, and the lower ends of the bents 48, 48 are slidably moved on the first hearth 1b2. I have.

In the above configuration, the synthetic solid fuel 12 charged into the primary combustion chamber Sa is burned while the first hearth 1b
The first plate members 94A and 94B which reciprocate on the upper side 1 sequentially send out toward the second hearth 1b2 and are gradually pushed to the downstream side.
4B, as described above, a large number of through holes 97, 97 as air passage holes are formed on the entire surface, and a space Sb serving as an air reservoir is secured on the back surface. The supply of combustion air from the air holes 2b formed in the hearth 1b1 to the combustion chamber S is not hindered. Furthermore, the first hearth 1b1 near the second hearth 1b1
Since the weir 17 is provided on the upper side so as not to hinder the sliding of the first plate members 94A and 94B, the hearth and the weir 17 are provided.
Only the ash or the fragmented fuel that passes through the opening 16 formed by the above is sent to the second hearth 1b1.

When the motor M2 is driven to rotate the endless chain 42 in the forward and reverse directions by a control mechanism (not shown), the second plate members 44A, 44B
Is a position where the tip retreats to the side wall 1d side in the secondary combustion chamber Sb (the position of the second plate member 44A in FIG. 4), and a position where the tip extends beyond the ash discharge port 20 ( (The position of the second plate member 44 </ b> B in FIGS. 3 and 4), and the ash is discharged from the ash discharge port 20.

At this time, the second plate members 44A and 44B have a large number of through holes 4 as air passage holes on the entire surface as described above.
7, 47 are formed, and a space Sb serving as an air pool is secured on the back surface, so that the combustion air from the air holes 2b formed in the second hearth 1b2 is reciprocated. The supply to the combustion chamber S is not hindered,
The complete combustion of the unburned portion remaining on the second hearth 1b2 is not hindered.

In a preferred embodiment, the first plate member 94
A and 94B, as shown in FIG. 4, when one of the first plate members 94A is in the forward position, the other first plate member 9
4B is operated by a control mechanism (not shown) so that both reciprocate out of phase so as to be in the retracted position. Thereby, it is possible to avoid a situation in which the air holes 2b formed in the first hearth 1b1 are simultaneously covered by the first plate members 94A and 94B, and it is possible to prevent the combustion from the first hearth 1b1 to the combustion chamber. The supply of air is more stable, and combustion can be more reliably prevented from becoming unstable.

Similarly, preferably, when the second plate member 44B is at the advanced position, the other second plate member 44A, 44B, as shown in FIG. It is a preferable mode that the member 44A is operated by a control mechanism (not shown) so that both members are reciprocated out of phase so as to be in the retreat position, whereby the air holes formed in the second hearth 1b2 are formed. 2b is a second plate member 44A,
It is possible to avoid a situation in which the combustion air is simultaneously covered by 44B, and the supply of combustion air from the second hearth 1b2 to the combustion chamber is further stabilized, and combustion can be more reliably prevented from becoming unstable. .

Next, the operation of the above-described synthetic solid fuel combustion device will be described. (1) Manufactured using an appropriate manufacturing apparatus not shown,
A synthetic solid fuel 12 composed mainly of combustible waste such as wood chips, paper waste, and resin material is put into a fuel hopper 10, and a motor M1 is operated to rotate a screw conveyor 11, and the fuel 12 is transferred to a combustion chamber S. (Primary combustion chamber Sa). At this time, preferably, both the first plate members 94A and 94B and the second plate members 44A and 44B are set at the retracted positions (retracted positions).

(2) The combustion air blower 50 is operated to ignite the ignition burner 5. The fuel of the ignition burner 5 uses heavy oil, kerosene, or the like as an auxiliary fuel. (3) It is confirmed by the flame sensor that the synthetic solid fuel 12 in the primary combustion chamber Sa has been ignited, and the supply of the auxiliary fuel to the ignition burner 5 is stopped. (4) During combustion, the combustion chamber S has a positive pressure, and the combustion flame in the primary combustion chamber Sa passes through the secondary combustion chamber Sb and blows out from the burner nozzle 3. At this time, tertiary air is supplied from the inside of the burner nozzle 3, and further complete combustion is achieved. The heat of this flame is used as a heat source for a boiler or the like (not shown).

(5) During combustion, the primary combustion chamber Sa is always in
The synthetic solid fuel 12 in the fuel hopper 10 is supplied from the screw conveyor 11 through the fuel supply port 6. After being ignited by the synthetic solid fuel 12, the first plate members 94A, 94A
B is preferably moved back and forth with the phase shifted alternately.
Also during reciprocation, the first plate members 94A, 94B have a large number of through holes 97, 97 formed therein, so that the primary combustion chamber Sa
Inside, sufficient primary combustion air is supplied from the hearth 1b1, so that combustion is not hindered. (6) By reciprocating the first plate members 94A and 94B,
As for the synthetic solid fuel 12 supplied to the first hearth 1b1, only the solid fuel 12 passing through the weir 17 and the opening 16 is the second hearth 1b.
2 fall on.

(7) When designing the furnace, the first hearth 1b
The length is set to such an extent that the combustion of the synthetic solid fuel 12 for supplying one length is almost completed. As a result, when the fuel falls on the second hearth 1b2, the fuel becomes almost ash. However, depending on the combustion conditions, there is a possibility that the fuel that is burning (that is, the state where the unburned portion remains) may fall, but in this case, the unburned portion is only the fragmented fuel, so The burned portion is burned again by the heat of the flame passing through the secondary combustion chamber Sb, and is completely turned into ash.

(8) The control mechanism sets a reciprocating movement interval according to the amount of generated ash (depending on the component ratio of the synthetic solid fuel to be used), and drives the rotary transfer device 40 to perform the second transfer. The plate members 44A, 44B are preferably reciprocated with their phases preferably shifted alternately. Even during the reciprocating movement, a large number of through holes 47, 47 are formed in the second plate members 44A, 44B.
Are formed, and sufficient combustion air is supplied from the hearth into the secondary combustion chamber Sb, so that combustion of unburned fuel is not hindered. (9) By the advance of the one second plate member 44A, most of the ash accumulated on the second hearth 1b2 in front of the second plate member 44A is scraped out and gradually pushed into the ash discharge port 20 side, and part of the ash is partially pushed. Eliminated on the side. In the meantime, the burning fuel 12 (if any) is impacted by the second plate member 44A, and the ash is shaken off.

(10) By being pushed further,
Ash begins to be discharged from the ash outlet 20 outside the machine. The second plate member 44A further advances, and after reaching the most advanced position as shown in FIG. 3, starts retreating. At the same time, the advance of the other second plate member 44B starts. The discharged ash is sent from the ash screw 54 to the ash receiver 60 via the valve 55a. (11) Hereinafter, during the continuation of the combustion, the reciprocating movement of the first plate members 94A and 94B with the phase shifted as necessary is repeated, and the reciprocation of the second plate members 44A and 44B with the phase shifted. The movement is repeated.

The above description is that of a preferred embodiment of a synthetic solid fuel combustion system according to the present invention, and there are many other variations. For example, the one having one screw conveyor 11 as the fuel delivery means is shown,
Two or more screw conveyors 11 may be arranged in parallel. Thereby, the amount of movement of the supplied fuel to the downstream side can be averaged in the width direction, and more complete combustion can be achieved.

Although a large number of air passage holes are formed in all of the first and second plate members, it is not always necessary to form air passage holes in the second plate member 44A or 44B depending on combustion conditions. It is not essential to provide two first and second plate members in parallel, and one plate member may be provided, and three or more first or second plate members may be provided with different phases. You may make it slide reciprocally. Furthermore, the hearth may be inclined toward the downstream side in the fuel feeding direction to move the fuel by its own weight. It is not essential to form the ceiling portion in two steps, and the ceiling portion may have the same height as a whole, or may be inclined as a whole toward the burner nozzle 3.

[0042]

According to the synthetic solid fuel combustion apparatus of the present invention, complete combustion of fuel components and removal of ash from the furnace are ensured even in the case of burning ash-rich synthetic solid fuel. Therefore, both high combustion efficiency and high safety can be achieved at the same time. Further, since the ash can be reliably discharged to the outside of the machine without causing the combustion gas or the unburned gas to leak out of the machine, high combustion efficiency can be continuously achieved.

[Brief description of the drawings]

FIG. 1 is a side view illustrating an embodiment of a synthetic solid fuel combustion device according to the present invention by a partial cross section.

FIG. 2 is a schematic sectional view illustrating a primary combustion chamber on a first hearth of the apparatus of FIG. 1;

FIG. 3 is a schematic sectional view illustrating a secondary combustion chamber portion on a second hearth of the apparatus of FIG. 1;

FIG. 4 is a top view illustrating the device of FIG. 1 with a partial cross section.

[Explanation of symbols]

A: Furnace main body, 1a: Furnace ceiling (1a1: First ceiling, 1a2: Second ceiling), 1b: Furnace floor (1b1 ...
First hearth, 1b2 Second hearth), 1c to 1f: Side wall of furnace, 2b, 2c, 2d: Air supply hole for combustion, 3: Burner nozzle, 3a: Tertiary air jacket, 6: Fuel Supply port, 7: air jacket, 10: fuel hopper,
11: screw conveyor, 12: synthetic solid fuel, 1
7 weir, 20 ash outlet, 94A, 94B first plate member, 97 through hole, 44A, 44B second plate member, 4
7: Through-hole, S: combustion chamber (Sa: primary combustion chamber, Sb: 2)
Next combustion chamber)

Claims (2)

[Claims] 1. A synthetic solid fuel combustion apparatus for burning synthetic solid fuel in a hearth, wherein the hearth comprises a first hearth and a first hearth located upstream in a fuel supply direction. And a second hearth positioned adjacent to the downstream side of the first hearth, and a synthetic solid fuel is provided on a side peripheral wall on the first hearth side in a direction from the first hearth to the second hearth. And a second plate member that reciprocates for sending ash and the like on the second hearth to the outside of the combustion chamber is provided on the second hearth. In a synthetic solid fuel combustion device provided with an ash discharge port on one side peripheral wall corresponding to the moving direction of the second plate member, the ash or fuel on the first hearth is supplied to the first hearth in a second manner. Reciprocating first plate member for sending out to the hearth of A weir is provided above the first hearth so as not to hinder the sliding of the first plate member, and at least the first plate member and the second plate member are provided with a weir. A synthetic solid fuel combustion device, wherein a large number of air passage holes are formed in a plate member so that combustion air supplied from a hearth can pass into a combustion chamber. 2. At least the second plate member of the first plate member and the second plate member is constituted by a plurality of plate members positioned parallel to each other, and each plate member has a different phase. 2. The synthetic solid fuel combustion apparatus according to claim 1, wherein the apparatus is capable of reciprocating.