JP7620341B2 - Solid fuel combustion equipment - Google Patents

Description

The present invention relates to a solid fuel combustion device, and in particular to a solid fuel combustion device for burning combustible solid waste as fuel to obtain heat.

Combustible solid waste such as resin (plastic) has been used as a raw material for RPF (Refuse derived paper and plastics densified fuel). Even though it is waste, it can be easily burned in a calciner and produce the same amount of heat as existing coke. In addition, because waste is treated as solid fuel, it is expected that the overall amount of carbon dioxide generated will be reduced compared to when new fuels such as heavy oil and natural gas are burned.

When solid fuel such as RPF is burned in a firing device, the solid fuel has poor fluidity within the device (firing furnace), and after the solid fuel is fired, firing ash is also produced. Therefore, simply putting the solid fuel into the firing device reduces the combustion efficiency of the solid fuel in the firing device (firing furnace). Furthermore, unless the firing ash is appropriately removed, the firing device cannot be operated safely.

Therefore, firing devices incorporating improvements in the supply of solid fuel and the removal of burned ash have been proposed (for example, Patent Documents 1 and 2, etc.). However, the firing devices described in each of the patent documents are not necessarily sufficient in terms of supplying solid fuel to the inside of the firing device and removing the burned ash after the solid fuel is burned, and further improvements are desired. In addition, if the mechanism of the firing device becomes complicated, the mechanism for supplying solid fuel, etc. is exposed to heat when the solid fuel is burned inside the firing device, and the durability of the device is likely to decrease. For this reason, improvements to the current firing devices have not progressed.

JP 2014-211255 A JP 2008-261527 A

After extensive research, the inventors have come up with an effective configuration for supplying solid fuel without exposure to heat during burning, ensuring the movement of solid fuel inside the burning device, and removing burned ash, leading to the completion of a new solid fuel combustion device.

The present invention has been made in consideration of the above points, and provides a solid fuel combustion device that uses flammable solid waste such as resin (plastic) as solid fuel, which prevents the parts related to the supply of solid fuel from being damaged by heat exposure during burning and improves the movement of solid fuel inside the burning device.

That is, the solid fuel combustion device of the embodiment is a solid fuel combustion device that supplies multiple solid fuels to a combustion section and obtains combustion heat through combustion, and the combustion section is characterized by having a first combustion chamber that burns the solid fuel, a supply section for supplying the multiple solid fuels to the first combustion chamber, a turntable section that forms the underside of the first combustion chamber and rotates the multiple solid fuels supplied from the supply section on the underside, and a stirring section that stirs the solid fuel accumulated in the turntable section on the turntable section.

Furthermore, the first combustion chamber may be cylindrical, and the supply unit may supply multiple solid fuels to the peripheral end of the turntable unit.

Furthermore, the turntable section may be formed with holes through which the combustion ash of multiple solid fuels falls, and a combustion ash discharge section may be provided below the turntable section.

Furthermore, a dust collection section may be provided below the turntable section, and the dust collection section may collect the combustion ash that falls from the turntable section.

Furthermore, a second combustion chamber may be provided above the first combustion chamber for the flames generated by the combustion of multiple solid fuels to rise.

Furthermore, the second combustion chamber may be provided with an air supply section for supplying air for the combustion of multiple solid fuels.

Furthermore, the stirring section may be equipped with a stirring blade or a long plate-like object, and may move the solid fuel accumulated in the turntable section to near the center of the turntable section.

Furthermore, a combustion smoke imaging unit that images the combustion smoke generated when the multiple solid fuels are burned and a fuel quantity control unit that controls the amount of solid fuel supplied from the supply unit to the first combustion chamber may be provided, and the fuel quantity control unit may determine the amount of combustion of the multiple solid fuels from the color of the combustion smoke imaged by the combustion smoke imaging unit and control the amount of the multiple solid fuels supplied from the supply unit to the first combustion chamber.

Furthermore, a combustion smoke imaging unit that images the combustion smoke generated when the multiple solid fuels are burned and an air volume control unit that controls the amount of air supplied from the air supply unit to the second combustion chamber may be provided, and the air volume control unit may determine the amount of combustion of the multiple solid fuels from the color of the combustion smoke imaged by the combustion smoke imaging unit and control the amount of air supplied from the air supply unit to the second combustion chamber.

The solid fuel combustion device of the present invention is a solid fuel combustion device that supplies multiple solid fuels to a combustion section to obtain combustion heat through combustion. The combustion section includes a first combustion chamber that burns the solid fuel, a supply section for supplying multiple solid fuels to the first combustion chamber, a turntable section that forms the underside of the first combustion chamber and rotates the multiple solid fuels supplied from the supply section on the underside, and a stirring section that stirs the solid fuel accumulated in the turntable section on the turntable section, so that it is possible to prevent damage to the parts related to the supply of solid fuel made of combustible solid waste due to heat exposure during burning.

1 is a schematic side view of an entire solid fuel combustion device according to an embodiment of the present invention; FIG. FIG. 2 is a schematic diagram of a first side of the combustion section. FIG. 2 is a schematic view of a second side of the combustion section. FIG. FIG. 4 is a plan view of the second combustion chamber. FIG. 2 is a schematic side view of an entire solid fuel combustion device showing the swirling flow generated by combustion. FIG. 2 is a schematic block diagram showing a control unit of the solid fuel combustion device. 4 is a flowchart showing a control flow of the solid fuel combustion device.

The solid fuel combustion device of the embodiment uses a combustible material called RPF (Refuse derived paper and plastics densified fuel) obtained by compressing solid combustible waste such as resin (plastic) and paper as solid fuel. The solid fuel is put into the combustion device and burned therein to generate combustion heat. Rather than burning the solid fuel itself, the solid fuel is heated to generate combustible gas from the solid fuel. The combustible gas then ignites to generate a flame, which is then collected as combustion heat. The generated combustion heat is supplied to a heat exchanger for generating steam such as a boiler, and the combustion heat itself is used for heating, drying, heating, etc. In this way, the solid fuel combustion device of the embodiment is a device for obtaining combustion heat from the solid fuel of RPF.

In particular, the solid fuel of RPF has good combustion efficiency because it is made primarily from waste materials such as resin (plastic) and paper. Furthermore, the solid fuel combustion device of the embodiment can process combustible waste. Therefore, it is expected that the amount of carbon dioxide generated during the generation of heat will be reduced compared to when new fuels such as heavy oil and natural gas are burned. Obviously, multiple pieces of solid fuel are put into the combustion device. Therefore, even when it is simply written as solid fuel, it means multiple (multiple pieces, multiple amounts) solid fuels.

1 is a schematic side view of the solid fuel combustion device 1 of the embodiment. The solid fuel combustion device 1 is a main part of the combustion section 10 and includes a first combustion chamber 11 into which solid fuel is carried and burned. Directly above the first combustion chamber 11, a second combustion chamber 52, a third combustion chamber 53, and a connection chamber 51 are provided in that order. The second combustion chamber 52 and the third combustion chamber 53 are spaces for amplifying the flame generated by the combustion of solid fuel in the first combustion chamber 11 to increase the amount of combustion heat. In the solid fuel combustion device 1 of the embodiment, the first combustion chamber 11, the second combustion chamber 52, and the third combustion chamber 53 are all cylindrical in shape. As described later, this is because it is convenient for the heat flow to rise while swirling. The connection chamber 51 is a space for connecting the generated combustion heat to a boiler heat exchanger or heat transfer piping (both not shown). The third combustion chamber 53 may be omitted depending on the size of the solid fuel combustion device 1 itself.

The combustion section 10 of this embodiment mainly comprises a first combustion chamber 11 that burns the solid fuel that is brought in, a supply section 12 that supplies the solid fuel to the first combustion chamber 11, a turntable section 20 that forms the bottom surface section 17 of the first combustion chamber 11 and rotates the bottom surface section 17, and a stirring section 30 that stirs the solid fuel that is brought in.

The turntable 20 is formed with a hole 22 (see FIG. 5) through which the ash from the burned solid fuel falls. A dust collection chamber 18 is formed below the turntable 20, which is installed on the underside 17 of the first combustion chamber 11.

The dust collection chamber 18 below the turntable 20 is provided with a burnt ash discharge section 42. The burnt ash that falls into the dust collection chamber 18 is transported by the burnt ash discharge section 42 to the burnt ash collection box 45.

In the solid fuel combustion device 1 shown in FIG. 1, the dust collection chamber 18 and the first combustion chamber 11, as well as their upper structure, are supported by legs 19. The turntable section 20 is connected to the turntable shaft section 26 and is driven by a rotation motor M4. The burnt ash discharge section 42 is driven by a discharge motor M3.

The configuration of each part will be explained by adding a plan view of the combustion section 10 in FIG. 2 to the overall side schematic diagram of the solid fuel combustion device 1 in FIG. 1. The supply section 12 has a supply rotation shaft 13 and a supply blade 14 attached in a spiral shape to the supply rotation shaft 13. The supply blade 14 is a spiral propeller called an Archimedes screw or Archimedes spiral. The supply rotation shaft 13 and the supply blade 14 are rotated by a supply motor M1. The solid fuel of the RPF is fed into the supply section 12 from a supply port 15 (hopper). Then, as the supply motor M1 is driven to rotate the supply rotation shaft 13 and the supply blade 14, the solid fuel moves from the position of the supply port 15 through the supply blade 14 to the tip of the supply section 12, and falls from the tip of the supply section 12 into the inside of the first combustion chamber 11.

As can be seen from FIG. 2, the tip of the supply section 12 does not penetrate deeply into the first combustion chamber 11, but remains at a position almost at the inner wall surface. Therefore, the tip of the supply section 12 is located directly above the peripheral end 21 of the turntable section 20. Because the tip of the supply section 12 does not penetrate deeply into the first combustion chamber 11, the supply section 12 (the supply rotating shaft 13 and the supply blades 14) is less likely to be thermally damaged, and the frequency of part replacement in the combustion device 1 is reduced. The turntable section 20 shown in FIG. 2 can be disassembled for replacement. Therefore, the linear portions shown on the turntable section 20 indicate the cut-off portions.

As can be seen from the schematic side view of FIG. 3, when solid fuel R continues to be dropped from the tip of the supply unit 12, it accumulates on the peripheral end 21 of the turntable unit 20 in the first combustion chamber 11. Therefore, it is necessary to move the unevenly accumulated solid fuel R on the upper surface of the turntable unit 20. Therefore, the solid fuel combustion device 1 is equipped with an agitator unit 30.

The agitator 30 includes an agitator shaft 31 and an agitator blade 32 attached in a spiral shape to the agitator shaft 31. The agitator blade 32 is a spiral propeller known as an Archimedes screw or Archimedes spiral. The agitator shaft 31 and the agitator blade 32 are rotated by an agitator motor M2. When solid fuel R is fed from the supply unit 12, the solid fuel R is unevenly accumulated on a part of the lower surface 17 of the first combustion chamber 11. Even if the turntable unit 20 rotates, the solid fuel R still accumulates on the peripheral end 21 of the turntable unit 20. Therefore, the solid fuel R accumulated on the peripheral end 21 of the turntable unit 20 is moved to the center of the turntable unit 20 through the agitator blade 32 of the agitator 30.

As shown in FIG. 1, the stirring blades 32 of the stirring unit 30 are installed at a small distance upward from the turntable unit 20 arranged on the underside 17 of the first combustion chamber 11. Also, as shown in FIG. 2, the stirring blades 32 of the stirring unit 30 extend from the peripheral end 21 of the turntable unit 20 toward the center of the turntable unit 20. As can be seen from the schematic side view of FIG. 4, the solid fuel R scraped off by the stirring blades 32 of the stirring unit 30 is moved from the peripheral end 21 of the turntable unit 20 to the center. At the same time, the turntable unit 20 itself rotates on the underside 17 of the first combustion chamber 11.

Therefore, regardless of where the solid fuel is accumulated on the peripheral end 21 of the turntable section 20, through the operation of the agitator section 30 and the rotation of the turntable section 20, the solid fuel is constantly moved from the peripheral end 21 of the turntable section 20 toward the center, and the accumulation (piling) of solid fuel changes into a mountain shape (see the change in the position of the solid fuel from Figure 3 to Figure 4).

The position of the agitator 30 is in the direction toward the center of the turntable 20 from the viewpoint of achieving agitation performance. In this case, the agitator shaft 31 and agitator blades 32 of the agitator 30 are exposed to the heat (fire) of combustion of the solid fuel. However, the heat of combustion of the solid fuel does not become hot enough to damage the agitator 30 near the peripheral end 21 of the turntable 20. Rather, the temperature becomes higher at the top of the first combustion chamber 11 and further above that. Therefore, the agitator 30 located near the turntable 20 is less affected by thermal damage caused by the combustion of the solid fuel.

In addition, the agitation unit 30 allows the solid fuel to move even when it is being burned. Therefore, the unburned solid fuel is moved on the turntable unit 20 by the agitation unit 30. The unburned solid fuel can then be completely burned at the location where it has been moved. For this reason, the agitation unit 30 contributes to improving the combustion efficiency of the solid fuel brought into the first combustion chamber 11.

When the stirring blade 32 attached to the stirring shaft 31 of the stirring unit 30 rotates in the forward direction, the solid fuel is moved to the center of the turntable unit 20 as described above. Here, the stirring unit 30 can reverse the rotation direction of the stirring blade 32 (reverse rotation). When the stirring blade 32 is rotated in the reverse direction, the burnt ash (clinker, etc.) of the solid fuel remaining on the turntable unit 20 is scraped out and discharged from the combustion unit 10 (first combustion chamber 11).

As another form of the agitator 30, a long plate-like object (not shown) can be used instead of the agitator shaft 31 and the agitator blades 32. A long rod-like object may also be used. The long plate-like object is inserted into the first combustion chamber 11 from the same position as the agitator 30 of the first combustion chamber 11. The position, angle, and length of the long plate-like object when inserting it into the first combustion chamber 11 are adjusted appropriately. By using a long plate-like object as the agitator 30, the solid fuel is constantly drawn from the peripheral end 21 of the turntable 20 toward the center as the turntable 20 rotates.

As can be seen from the overall schematic side view of FIG. 1 (schematic side views of FIG. 3 and FIG. 4), a dust collection chamber 18 is formed below the lower surface portion 17 (turntable portion 20) of the first combustion chamber 11. Here, the partially exploded view of FIG. 5 shows the turntable portion 20 cut roughly in half, with the lower half of the illustrated page showing only the turntable portion 20 and the upper half showing the inside of the dust collection chamber 18 directly below the turntable portion 20.

A number of holes 22 are formed in the plate surface of the turntable section 20. The solid fuel R (see Figures 3 and 4) used is an irregular lump of approximately 3 to 7 cm. The remaining residue from the burning of the solid fuel in the first combustion chamber 11 becomes burnt ash As. The burnt ash As passes through the holes 22 and falls into the dust collection chamber 18 directly below the turntable section 20. The holes 22 may be appropriately shaped, such as round, square, or long slit-shaped. The holes 22 may be appropriately arranged, such as radially from the center of the turntable section 20 or in an arc shape.

The dust collection unit 40 is connected to the turntable shaft 26 at the bottom of the turntable unit 20 (see Figure 5). The dust collection unit 40 is a plate-shaped member that contacts the bottom surface of the dust collection chamber 18, and has a length equivalent to the radius of the inner bottom surface of the dust collection chamber 18 (see Figures 1, 3, and 4). The burnt ash As that falls into the dust collection chamber 18 is raked up over the entire bottom surface of the dust collection chamber 18 by the dust collection unit 40, which rotates in conjunction with the rotation of the turntable unit 20 (turntable shaft 26) by the rotation motor M4. The collected burnt ash As is then guided from the dust collection port 41 to the burnt ash discharge unit 42.

As shown in Figures 1, 3, and 4, the burnt ash discharge section 42 is equipped with discharge blades 43 attached in a spiral shape to the discharge rotating shaft 44. The discharge blades 43 are spiral propellers also known as Archimedes' screw or Archimedes' spiral. The discharge rotating shaft 44 and the discharge blades 43 are rotated by the discharge motor M3. Thus, the burnt ash As that falls from the dust collection port 41 and enters the burnt ash discharge section 42 is efficiently dropped through the discharge blades 43 from the burnt ash discharge port 46 into the burnt ash collection box 45.

According to the embodiment of the solid fuel combustion device 1, the turntable unit 20 is rotated at a rotational speed of one rotation per minute. Of course, the rotational speed is appropriate depending on the size of the device itself. The turntable unit 20 is rotated when the solid fuel is brought in and formed into a mountain shape on the turntable unit 20, and when the burnt ash is removed after combustion. Of course, if the solid fuel is continuously brought into the first combustion chamber 11, the turntable unit 20 is rotated at all times.

As shown in FIG. 1, the solid fuel combustion device 1 of the embodiment is provided with a second combustion chamber 52 and a third combustion chamber 53 above the first combustion chamber 11. When combustible gas generated from heated solid fuel is burned, air is supplied from outside the combustion device 1 to increase the combustion efficiency. Specifically, as shown in the plan view of FIG. 6, an air supply unit is provided in the second combustion chamber 52. In the embodiment, a first air supply unit 55 and a second air supply unit 56 are provided. Air enters the second combustion chamber 52 from both the first air supply unit 55 and the second air supply unit 56. The wind pressure of the entering air triggers a swirling flow of flame (flame vortex, heat flow) inside the second combustion chamber 52, including the first combustion chamber 11, as shown by the arc-shaped arrow in FIG. 6.

The swirling flow of flame generated by the combustion of solid fuel (combustible gas) spreads to the first combustion chamber 11 and the second combustion chamber 52. As shown in the overall side schematic diagram of FIG. 7, the swirling flow of flame indicated by the arc-shaped arrow rises vertically to the first combustion chamber 11, the second combustion chamber 52, and the third combustion chamber 53. In this way, the flame grows from the solid fuel accumulated in the first combustion chamber 11 to the height reaching the second combustion chamber 52 and the third combustion chamber 53, and a swirling flow of flame is generated. The temperature of the upper side of the flame becomes high compared to the size of the rising flame. Therefore, in order to increase the combustion heat that can be obtained from the solid fuel per weight, it is desirable to provide the second combustion chamber 52 and further the third combustion chamber 53 above the first combustion chamber 11.

A series of explanations and illustrations have been provided to describe the efficient combustion of solid fuel in the solid fuel combustion device 1 of the embodiment. The mechanism for controlling the combustion conditions in the solid fuel combustion device 1 of the embodiment will now be described. In the example of the solid fuel combustion device 1 of the embodiment, the color (black, white, colorless, etc.) of the combustion smoke generated when the solid fuel is burned is identified, the quality of the combustion state of the solid fuel (complete combustion or incomplete combustion) is determined, and the amount of solid fuel supplied and the amount of air supplied are controlled.

Figure 8 is a block diagram showing the schematic configuration of the control unit 100 implemented in the solid fuel combustion device 1 of the embodiment. The control unit 100 is configured with hardware such as a microcomputer required for receiving various signals, performing calculations, storing, and controlling operations, and is equipped with a CPU 101, ROM 102, RAM 103, a storage unit 104, an I/O 105 (input/output interface), etc.

When each functional unit of the control unit 100 (computer) in FIG. 8 is realized by software, the control unit 100 is realized by executing the instructions of a program, which is software that realizes each function. The recording medium that stores this program can be a "non-transient tangible medium," such as a CD, DVD, semiconductor memory, or programmable logic circuit. In addition, this program may be supplied to the control unit 100 of the solid fuel combustion device 1 via any transmission medium (communication network, broadcast waves, etc.) that can transmit the program.

The memory unit 104 of the control unit 100 is a known storage device such as an HDD or SSD. The memory unit 104 may be an external server (not shown). The memory unit 104 stores various data, information, programs, various data necessary for executing the programs, etc. Furthermore, the functional unit that executes various calculations, arithmetic operations, etc. is a computing element such as a CPU 101. In addition, input devices such as a keyboard and mouse (not shown), a display unit (a display device such as a display not shown), an output device that outputs data, etc. may also be appropriately connected to the I/O 105 of the control unit 100.

The combustion smoke image capturing unit 110 is a known CCD camera, CMOS image sensor, etc. It captures the color (black, white, colorless, etc.) of the combustion smoke K that is generated when the solid fuel is burning in the first combustion chamber 11. The color of the combustion smoke is then transmitted to the control unit 100.

The fuel quantity control unit is the supply motor M1 of the agitator 30 in FIG. 8. The rotation speed of the supply rotating shaft 13 and the supply blade 14 of the supply motor M1 is controlled to increase or decrease, thereby increasing or decreasing the amount of solid fuel supplied from the agitator 30 to the first combustion chamber 11.

The air volume control unit is the air supplier F in FIG. 8. The air supplier F is a known blower or the like, and in this embodiment, supplies air (oxygen) to the first air supplier 55 and the second air supplier 56. By controlling the increase/decrease in the amount of air supplied from the air supplier F to the second combustion chamber 52, the amount of oxygen in the first combustion chamber 11 increases/decreases.

As shown in the figure, the combustion smoke image capture unit 110, the supply motor M1 (fuel quantity control unit), and the air supply F (air quantity control unit) are connected to the I/O 105 and are controlled by the CPU 101 of the control unit 100.

The flow chart of FIG. 9 will be used to explain the control of the solid fuel combustion state. First, the combustion smoke generated during the combustion of the solid fuel is photographed by the combustion smoke photographing unit 110 (S101). The photographed combustion smoke information is sent to the control unit 100, and the amount of solid fuel burned is determined. That is, a smoke color judgment is performed to determine whether the color corresponds to any of the colors of the combustion smoke (e.g., black, white, colorless, etc.) (S102). For example, a comparison with a predetermined smoke color reference color is made to determine whether the color of the photographed combustion smoke is blacker or not. If the result of the smoke color judgment is that the color of the combustion smoke is relatively white or colorless, the solid fuel combustion state can be judged to be approximately complete combustion. In this case, the current supply amount of solid fuel and the amount of air supplied are maintained as they are. Therefore, the supply motor M1 (fuel amount control unit) and the air supply machine F (air amount control unit) are instructed to maintain the current state, and the process ends without any changes.

On the other hand, if the result of the smoke color judgment is that the color of the combustion smoke is relatively black or dark gray, it is highly likely that the solid fuel is incompletely burned. In this case, it is necessary to change the current amount of solid fuel supplied and the amount of air supplied to move to complete combustion. Therefore, a command to make the change is issued to the supply motor M1 (fuel amount control unit) and the air supply machine F (air amount control unit) (S104). Thus, the process ends. After that, the combustion smoke is photographed again and a smoke color judgment is performed to confirm the state of solid fuel combustion.

Specifically, the supply motor M1 (fuel quantity control unit) is controlled to reduce the amount of solid fuel supplied from the supply unit 12 to the first combustion chamber 11. In addition, the air supplier F (air quantity control unit) is controlled to increase the amount of air supplied from the air supplier (first air supplier 55 and second air supplier 56) to the second combustion chamber 52. Of course, it is also possible to control to increase the amount of solid fuel or to decrease the amount of air. Note that both the supply motor M1 (fuel quantity control unit) and the air supplier F (air quantity control unit) may be controlled simultaneously.

Furthermore, even when the amount of combustion heat required when the solid fuel combustion device 1 is in operation is increased or decreased, control is performed via the control unit 100 on either or both of the supply motor M1 (fuel quantity control unit) and the air supply F (air quantity control unit).

REFERENCE SIGNS LIST 1 Solid fuel combustion device 10 Combustion section 11 First combustion chamber 12 Supply section 13 Supply rotating shaft 14 Supply blade 17 Underside section 18 Dust collection chamber 20 Turntable section 30 Stirring section 31 Stirring rotating shaft 32 Stirring blade 40 Dust collection section 41 Dust collection port 42 Burnt ash discharge section 43 Discharge blade 44 Discharge rotating shaft 45 Burnt ash recovery box 51 Connection chamber 52 Second combustion chamber 53 Third combustion chamber M1 Supply motor (fuel amount control section)
M2 Stirring motor M3 Discharge motor M4 Swivel motor R Solid fuel As Burned ash 100 Control unit (computer)
101 CPU
102 ROM
103 RAM
104 Memory unit 105 Input/output interface 110 Combustion smoke photographing unit F Air supply K Combustion smoke

Claims (7)

A solid fuel combustion device that supplies a plurality of solid fuels to a combustion section and obtains combustion heat by combustion,
The combustion section includes:
a cylindrical first combustion chamber for burning the plurality of solid fuels;
a cylindrical second combustion chamber located above the first combustion chamber and through which a flame generated by combustion of the plurality of solid fuels rises;
a cylindrical third combustion chamber located above the second combustion chamber and through which a flame generated by the combustion of the plurality of solid fuels rises;
a connection chamber provided at an upper portion of the third combustion chamber for connecting combustion heat generated by the combustion of the plurality of solid fuels to a heat exchanger or a heat transfer pipe;
A supply unit for supplying the plurality of solid fuels to the first combustion chamber;
a turntable portion that forms a bottom surface of the first combustion chamber and rotates the plurality of solid fuels supplied from the supply portion on the bottom surface;
a stirring unit that is installed in the first combustion chamber on the turntable unit, and that has a stirring blade of a spiral propeller that is connected to a stirring rotation shaft that extends from the peripheral end of the turntable unit toward the center of the turntable unit and rotates, and that stirs the plurality of solid fuels accumulated on the turntable unit by moving the solid fuels from the peripheral end of the turntable unit toward the center, forming the solid fuels into a mountain shape and accumulating the solid fuels ,
A first air supply unit and a second air supply unit are provided in the second combustion chamber in an opposing arrangement as air supply units for supplying air for the combustion of the plurality of solid fuels to the second combustion chamber, and a swirling flow of flame is generated inside the first combustion chamber, the second combustion chamber, and the third combustion chamber in response to wind pressure of air entering the second combustion chamber from the first air supply unit and the second air supply unit.
A solid fuel combustion device characterized by the above. The solid fuel combustion device according to claim 1 , wherein the supply unit supplies the plurality of solid fuels to the peripheral end of the turntable unit. A hole through which the combustion ashes of the plurality of solid fuels fall is formed in the turntable portion,
2. The solid fuel combustion device according to claim 1, further comprising a combustion ash discharge section provided below said turntable section. A dust collecting section is provided under the turntable section,
4. The solid fuel combustion device according to claim 3, wherein the dust collecting section collects the combustion ash that has fallen from the turntable section. The solid fuel combustion device according to claim 4, wherein the dust collecting section is provided with a burnt ash discharge section having discharge blades of a spiral propeller that is connected to a discharge rotating shaft and rotates. a combustion smoke photographing unit that photographs combustion smoke generated during combustion of the plurality of solid fuels;
a fuel amount control unit for controlling the amount of the plurality of solid fuels supplied from the supply unit to the first combustion chamber;
The solid fuel combustion device described in claim 1, wherein the fuel quantity control unit determines the amount of combustion of the multiple solid fuels from the color of the combustion smoke photographed by the combustion smoke photographing unit, and controls the amount of the multiple solid fuels supplied from the supply unit to the first combustion chamber. a combustion smoke photographing unit that photographs combustion smoke generated during combustion of the plurality of solid fuels;
An air amount control unit is provided to control the amount of air supplied from the first air supply unit and the second air supply unit to the second combustion chamber,
The solid fuel combustion device described in claim 1, wherein the air amount control unit determines the amount of combustion of the multiple solid fuels from the color of the combustion smoke photographed by the combustion smoke photographing unit, and controls the amount of air supplied from the first air supply unit and the second air supply unit to the second combustion chamber.

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