JP2011099595A - Combustion device of solid fuel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion device capable of continuously burning solid fuel such as wood chips and wood waste for a long period while keeping high combustion efficiency. <P>SOLUTION: An air flow channel 12 of an annular space is disposed between concentrically-disposed outer jacket cylindrical body 3 and intermediate cylindrical body 4 of a small diameter, an air blower 13 is disposed to supply the air toward the tangential direction of the outer jacket cylindrical body 3 and the intermediate cylindrical body 4 to the air flow channel 12, a flow guide section 3a for guiding the air toward an inner peripheral wall of the intermediate cylindrical body 4 is disposed on an upper end section of the air flow channel 12, a combustion cylindrical body 11 having a diameter and a cylinder height smaller than those of the intermediate cylindrical body 4, is concentrically disposed inside of the intermediate cylindrical body 4 at a lower position of the intermediate cylindrical body 4, an ash discharge passage 17 of an annular space is formed between the intermediate cylindrical body 4 and the combustion cylindrical body 11, a fuel supply cylinder 10 for solid fuel F is communicated and connected with a lower end opening of the combustion cylindrical body 11, and an ash collection box 18 for recovering the ash, is detachably disposed at a lower part of the ash discharge passage 17. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a combustion apparatus that generates high-temperature combustion gas by burning solid fuel such as wood chips, wood chips, or RTF.

  Conventionally, as a combustion apparatus that burns solid fuel, combustible gas supplied into the combustion furnace is divided into a number of combustion regions by dividing the space in the combustion furnace into a large number of combustion regions by the air current generated by the centrifugal force of high-pressure air swirling at high speed in the combustion furnace. The thing which employ | adopted the centrifugal combustion method which burns an active substance with high efficiency is known (for example, refer patent document 1). In this combustion apparatus, an annular space is provided between a combustion chamber provided in an upper portion of a fuel tank and an outer casing disposed with a space from an outer peripheral surface thereof, and combustion is performed from the lower portion with respect to the annular space. By supplying air from the blower toward the tangential direction of the outer surface of the chamber, the air is raised while swirling in the annular space, and this swirling flow of air flows into the combustion chamber from the upper end opening of the combustion chamber. It is made to descend | fall along the inner wall surface of this, and is supplied to the combustion area | region in a combustion chamber as combustion air. This combustion device mixes incompletely combustible combustible material with the swirling flow of air flowing along the inner wall of the combustion chamber by the centrifugal force of the swirling airflow of its weight and high-speed swirling air, thereby improving the combustion efficiency. We are trying to improve.

Japanese Patent No. 3813927

  However, in the above combustion apparatus, the residue that has not been completely combusted in the combustion chamber is supplied to the auxiliary combustion chamber above the combustion chamber by the updraft so as to be completely combusted, and then the combustion gas is supplied to the auxiliary combustion chamber. Since it is discharged from the upper exhaust soot, and no consideration is given to the treatment of ash contained in the combustion gas, it is difficult to continue combustion continuously over a long period of time while maintaining high combustion efficiency. is there. In other words, when burning solid fuel, a relatively large amount of ash is generated, and the ash produced by incomplete combustion of particularly heavy or inorganic substances is blown up by a flame from the combustion region in the combustion chamber. However, it does not scatter, receives centrifugal force due to the swirling flow of air, hits the inner wall of the combustion chamber, decreases kinetic energy, falls downward, and is not discharged from the exhaust soot. Only smoke is released. The fallen ash accumulates on the surface of the unburned solid fuel in the fuel tank below the combustion chamber, so that the combustion efficiency in the combustion chamber decreases. Therefore, in this combustion apparatus, if high combustion efficiency is to be maintained, for example, with the combustion operation stopped, the fuel tank that is pressed against the flange at the lower end of the combustion chamber by the hydraulic jack is lowered by the operation of the hydraulic jack. After that, it is necessary to frequently perform a complicated operation of removing ash deposited on the surface of the solid fuel in the fuel tank.

Further, as described above, the combustion device is configured such that the fuel tank is pressed against and separated from the combustion chamber by the vertical movement of the hydraulic jack, and the fuel is burned every time the solid fuel in the fuel tank is completely combusted. It is considered that the process of lowering the tank and taking out the ash accumulated in the fuel tank and supplying new solid fuel to the fuel tank is repeated. Therefore, since this combustion apparatus needs to periodically remove ash and supply solid fuel, it cannot be operated continuously for a long time or for a long period of time, so the high-temperature combustion gas generated in the combustion of solid fuel It is not possible to effectively use the heat energy. In other words, it seems that this combustion apparatus can only be applied to uses such as waste vinyl, waste plastic, and waste tires that are efficiently incinerated by centrifugal combustion.

  In the present invention, instead of liquid fuel or gaseous fuel, solid fuel such as wood chips, wood chips or RTF is continuously burned over a long period of time while maintaining high combustion efficiency. It aims at providing the combustion apparatus which can be produced | generated stably.

  In order to achieve the above object, the solid fuel combustion apparatus according to the first aspect of the present invention includes a cylindrical outer cylinder and an intermediate cylinder having a diameter smaller than that of the outer cylinder, arranged concentrically, An air flow path in an annular space is provided between the outer cylinder and the intermediate cylinder, and the blower is within a range in an inscribed direction of the outer cylinder and an outer direction of the intermediate cylinder with respect to the air channel. A flow guide portion is provided at the upper end of the air flow path to guide the air toward the inner peripheral wall of the intermediate cylinder, and the intermediate cylinder A combustion cylinder having a small diameter and cylinder height with respect to the cylinder is concentrically arranged at a position below the intermediate cylinder, and an annular space is formed between the intermediate cylinder and the combustion cylinder. An ash discharge path is provided, and a solid fuel supply tube is connected to the lower end opening of the combustion cylinder. Is, below the ash discharge channel, ash collection box for collecting the ash is characterized in that detachably provided.

  A solid fuel combustion apparatus according to a second aspect of the present invention is the solid fuel combustion apparatus according to the first aspect, wherein the outer cylindrical body and the intermediate cylindrical body are supported on an upper end surface of a support base having a rectangular horizontal section, A fuel transfer cylinder, which is provided in the support base in a penetrating state and conveys solid fuel continuously or intermittently, is connected in communication with a lower end opening of the fuel supply cylinder, and the ash collection box is connected to the fuel supply cylinder And a notch-like portion into which the fuel transfer cylinder can be inserted and retracted, and is housed and supported in the support base so as to be freely accessible.

  A solid fuel combustion apparatus according to a third aspect of the present invention is the solid fuel combustion apparatus according to the first or second aspect, wherein the auxiliary outer cylinder having the same diameter as the outer cylinder and the upper end of the outer cylinder are released. An auxiliary intermediate cylinder having an inner diameter corresponding to the outlet is disposed concentrically, and an auxiliary air flow path in an annular space between the auxiliary outer cylinder and the auxiliary intermediate cylinder is provided. A blower is provided in such an arrangement that air is supplied to a path in a range of an inscribed direction of the auxiliary outer cylinder and an outer circumscribed direction of the auxiliary intermediate cylinder, and the auxiliary A centrifugal combustion mechanism provided with a flow guide portion that guides air from an air flow path toward an inner peripheral wall of the auxiliary intermediate cylinder, and one or more centrifugal combustions are provided at an upper end portion of the outer cylinder The mechanism is connected in communication.

  According to a fourth aspect of the present invention, there is provided the solid fuel combustion apparatus according to any one of the first to third aspects, wherein the combustion gas discharged from the discharge port of the outer cylinder or the auxiliary outer cylinder is the same. A heat exchanger to be guided; a dust collector that separates the exhaust gas after heat exchange in the heat exchanger into dust and clean gas; and an induction blower that sucks the clean gas in the dust collector and discharges it from the exhaust pipe It has more.

According to the solid fuel combustion apparatus of the first aspect of the invention, the air flowing into the air flow path from the blower rises while swirling at high speed along the air flow path of the annular space, and the swirl flow After changing the flow direction toward the inside by the flow guide part while maintaining the above, it descends while turning along the inner peripheral wall of the intermediate cylinder, and is sucked by the negative pressure generated inside the combustion cylinder, Combustion of the solid fuel is promoted by being supplied as combustion air to the combustion region in the combustion cylinder while maintaining the turning. When the solid fuel in the combustion cylinder burns in a centrifugal combustion system by supplying a swirling flow of air, the combustion gas swirls in a spiral shape and rolls up in a reverse tornado shape. The ash blown away to the outside hits the inner peripheral wall of the intermediate cylinder, so that the kinetic energy is reduced and recovered from the ash discharge path to the ash collection box. For this reason, the combustion cylinder is always maintained in a state in which ash is excluded, and the solid fuel is continuously burned with high efficiency over a long period of time, so that a high-temperature combustion gas is always stably generated over a long period of time.

  According to the solid fuel combustion apparatus of the second aspect of the present invention, the ash contained in the combustion gas is collected in the ash collection box through the ash discharge path, so that the operation of stopping the combustion operation and removing the ash is performed. Since it becomes unnecessary, solid fuel can be supplied to the combustion cylinder via the fuel supply cylinder by the fuel transfer cylinder and the combustion operation can be continued for a long period of time. Further, the ash collected and collected in the ash collection box can be easily discarded by periodically removing the ash collection box from the support base. The ash collection box has a notch that allows the fuel supply cylinder and the fuel transfer cylinder to be inserted and removed, so that the ash falling from the ash discharge path can be reliably collected inside the support stand. be able to.

  According to the solid fuel combustion apparatus of the third aspect of the present invention, the non-combustible gas contained in the combustion gas rising from the discharge port of the outer cylinder and flowing in by the centrifugal combustion mechanism connected to the upper end of the outer cylinder. The portion is completely burned and becomes a higher-temperature combustion gas, which is discharged from the discharge port of the auxiliary exterior cylinder. In addition, since the ash from the combustion of heavy and inorganic substances is collected in the ash collection box and is not blown up from the discharge port of the outer cylinder, the centrifugal combustion mechanism is equipped with an ash collection mechanism. A simple structure that is not provided can be obtained.

  According to the solid fuel combustion apparatus of the fourth aspect of the present invention, the required high-temperature combustion gas generated stably and continuously is supplied to the heat exchanger, and the fluid flowing in the heat exchanger itself By exchanging heat so as to give the heat energy, high-temperature water, steam or hot air is efficiently generated and can be suitably used for various industrial applications such as an air conditioning system. In addition, the air pressure is always positive toward the exhaust pipe due to the pushing direction of the air supplied from the blower into the device and the suction direction of the exhaust gas by the induction blower, so the reverse from the combustion cylinder to the fuel supply means Smoke is effectively prevented.

1 is a longitudinal sectional view showing a solid fuel combustion apparatus according to a first embodiment of the present invention. It is sectional drawing along the II-II line of FIG. It is sectional drawing along the III-III line of FIG. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 in a state where an ash collection box is taken out. It is a longitudinal cross-sectional view which shows the combustion apparatus of the solid fuel which concerns on 2nd Embodiment of this invention. It is a figure for demonstrating the structure of the combustion apparatus of the solid fuel which concerns on 3rd Embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a solid fuel combustion apparatus according to a first embodiment of the present invention. In this figure, this combustion apparatus has a base plate 2 mounted and fixed on the upper end surface of a support base 1, and on the base plate 2 both a cylindrical outer cylinder 3 and an inner side of the outer cylinder 3. The intermediate cylinders 4 arranged at intervals are fixed by a plurality of bolts 7. The outer cylinder 3 and the intermediate cylinder 4 are both cylindrical as will be described later, and the intermediate cylinder 4 has a smaller diameter than the outer cylinder 3. Inside the support base 1, for example, a cylindrical fuel transfer cylinder 9 in which a screw 8 for transferring solid fuel F made of, for example, wooden chips or wood chips is mounted is placed on the support base 1 in an arrangement placed on the floor surface. On the other hand, a cylindrical fuel supply cylinder 10 is directed toward the center of the intermediate cylinder 4 from the vicinity of the supply downstream end (left end in the figure) of the fuel transfer cylinder 9 through one side. It extends upward.

  Therefore, the fuel transfer cylinder 9 is provided with a bulging cylinder portion 9a that protrudes to the left in the drawing from the connecting portion of the fuel supply cylinder. The fuel supply cylinder 10 supports a combustion cylinder pair 11 from below by connecting a combustion cylinder 11 having a cylindrical opening at the upper end opening thereof. One end portion (left end portion in the figure) of the screw 8 is rotatably supported by the bulging cylinder portion 9 a of the fuel supply cylinder 10 via a bearing 15. Further, the screw 8 is formed with a forward conveying portion 8 that functions to convey the solid fuel F to the left in the drawing to a lower position near the center of the fuel supply cylinder 10 on the downstream side of the supply. A reverse conveying portion 8b that functions to convey the solid fuel F to the right in the drawing is formed at a location on the supply downstream side with a gap. A part of the reverse conveying portion 8b is accommodated in the bulging cylinder portion 9a.

  In this combustion apparatus, the solid fuel F supplied into the combustion cylinder 11 from the fuel transfer cylinder 9 through the fuel supply cylinder 10 by the screw 8 is ignited by an ignition device (not shown) such as a burner, and the screw 8 The solid fuel F supplied to the combustion cylinder 9 through the fuel transfer cylinder 9 is continuously burned in the combustion cylinder 11 by the rotational drive. The solid fuel F in the fuel conveyance cylinder 9 is conveyed toward the lower position of the fuel supply cylinder 10 by the normal conveyance part 8a of the screw 8, and a part of the solid fuel F moves below the fuel supply cylinder 10 by this conveyance force. It passes through the bulging cylinder part 9 a and the solid fuel F in the bulging cylinder part 9 a is returned to the lower position of the fuel supply cylinder 10 by the reverse conveying part 8 b of the screw 8. In this way, the solid fuel F is transported in the opposite direction at the lower portion of the fuel supply cylinder 10 in the fuel conveyance cylinder 9 and pushed upward by hitting each other, and is smoothly supplied to the fuel supply cylinder 10. The The outer cylinder 3 is preferably made of iron, and the intermediate cylinder 4 and the combustion cylinder 11 are preferably made of stainless steel or casting.

  The outer cylindrical body 3 and the intermediate cylindrical body 4 that are both cylindrical are arranged concentrically, and an air channel 12 in an annular space is formed between the outer cylindrical body 3 and the intermediate cylindrical body 4 in plan view. Has been. A blower 13 that supplies air A to the air flow path 12 at a high pressure is attached to the lower portion of the outer cylinder 3 with a blower pipe 22 interposed. A flow guide portion 3 a that introduces air A <b> 1 that has risen in the air flow path 12 into the inside from the upper end opening of the intermediate cylinder 4 is integrally formed at the upper end of the exterior cylinder 3. The flow guide portion 3 a is formed in an annular inner casing shape that extends inwardly from a position higher than the upper end of the intermediate cylinder 4 in the outer cylinder 3, and is sent out while turning from the air flow path 12. A1 is prevented from moving upward by the annular flow guide portion 3a, and keeps swirling along the lower surface of the flow guide portion 3a, and from a pressure region close to a vacuum generated near the upper end opening of the intermediate cylinder 4 Is introduced toward the direction along the inner peripheral wall of the intermediate cylinder 4. The combustion cylinder 11 has a small diameter and approximately half the cylinder length with respect to the intermediate cylinder 4, is disposed concentrically with the intermediate cylinder 4, and has a plurality of stays 14 interposed therebetween. 4 is supported from the side. Between the intermediate cylinder 4 and the combustion cylinder 11, an ash discharge path 17 in an annular space is formed in plan view.

  An ash passage 2a of ash B falling through the ash discharge passage 17 is opened in a circular shape in the base plate 2, and a mesh-like or lattice-like large ash is provided at the entrance of the ash passage 2a. A blocking plate 16 is provided. Below the ash passage 2a, an ash collection box 18 is disposed so as to be slidable in the horizontal direction by the slide guide rail 1a of the support base 1. Further, the mounting plate 20 fixed so as to span the opposing side wall of the support base 1 is provided with a plurality of guide rollers 21 that roll in contact with the lower surface of the ash collection box 18. An outlet 1b of the ash collection box 18 is opened on one side wall of the support stand 1, and a lid 19 for opening and closing the outlet 1b is attached to be openable and closable. The ash collection box 18 is provided with a handle 18a for easily performing the take-out operation.

In FIG. 2, which is a cross-sectional view taken along the line II-II in FIG. 1, the blower pipe 22 that supplies the high-pressure air A from the blower 13 to the air flow path 12 is in the inscribed direction of the exterior cylinder 3 and the intermediate cylinder. The air cylinder A is fixed to the outer cylindrical body 3 so as to supply the air A within the circumscribing range of the body 4. Accordingly, the air A flowing into the air flow path 12 from the blower pipe 22 becomes a primary swirl air flow A1 swirling at a high speed along the air flow path 12 in the annular space, and is indicated by an arrow in FIG. 1 while swirling. So as to rise. The primary swirling air flow A1 that has reached the upper end of the air flow path 12 is prevented from being moved upward by the flow guide portion 3a at the upper end of the outer cylindrical body 3 and maintained swirling, as shown by arrows in FIG. As will be described later, the inner peripheral wall of the intermediate cylinder 4 receives a suction force from a pressure region close to a vacuum generated in the vicinity of the opening of the intermediate cylinder 4 by the combustion gas G that rises in a spiral and reverse tornado shape. It is introduced toward the direction along. In this way, the primary swirling air flow A1 flowing into the intermediate cylindrical body 4 as indicated by the two-dot chain line while maintaining the swirling is the secondary swirling air flow A2 swirling along the inner peripheral wall of the intermediate cylindrical body 4. Thus, this secondary swirling air flow A2 descends along the inner peripheral wall of the intermediate cylinder 4 as shown by the arrow in FIG.

  When the secondary swirling air flow A2 descends to the vicinity of the upper end opening of the combustion cylinder 11, a negative pressure generated inside the combustion cylinder 4 due to the combustion gas G rising in a spiral shape and reverse tornado shape. The air is sucked and flows into the combustion cylinder 11 while maintaining the swirl, and becomes a tertiary swirl air flow A3 swirling along the inner peripheral wall of the combustion cylinder 11, and combustion air enters the combustion region in the combustion cylinder 11 To promote combustion of the solid fuel F. Therefore, the high-temperature combustion gas G (FIG. 1) generated by burning the solid fuel F in the combustion cylinder 11 is spirally formed by the air flow by the tertiary swirl air flow A3 and the secondary swirl air flow A2, and It rises like a reverse tornado. That is, the solid fuel F is burned with high efficiency by the centrifugal combustion method, and efficiently generates the high-temperature combustion gas G.

  The ash B, which is blown up by the flame of the solid fuel F in the combustion cylinder 11 and blown up above the combustion cylinder 11 and burned with a heavy substance or an inorganic substance, has a spiral shape and a reverse tornado shape. The centrifugal force of the airflow that rises the combustion gas G is blown away radially outward from above the opening of the combustion cylinder 11 and hits the inner peripheral wall surface of the intermediate cylinder 4 to reduce the kinetic energy, A part of the secondary swirling air flow A2 falls into the ash collection box 18 through the ash discharge passage 17 and the ash passage 2a. At this time, the large ash B that is not completely burned is prevented from dropping by the large ash blocking plate 16 and once accumulated on the large ash blocking plate 16, and then the combustion gas G in the combustion cylinder 11. It burns completely in the ash discharge passage 17 which is in a high temperature atmosphere due to heat transfer from the ash. Therefore, unburned large ash B can be reliably prevented from falling into the ash collection box 18 and burning in the ash collection box 18.

  In FIG. 3 which shows a cross-sectional view along the line III-III in FIG. 1, the support base 1 has an outer cylindrical body 3, an intermediate cylindrical body 4 and a combustion cylindrical body 11 which are all cylindrical. It is a square cylinder with a square horizontal cross section that can contain the bodies 2, 4, 11. The ash collection box 18 has a square cylindrical shape having a square horizontal cross section having an outer peripheral wall corresponding to the inner peripheral wall in the support base 1 and has an upper end opened. Further, the ash collecting box 18 is formed with a U-shaped notch 18b having an elongated horizontal cross section corresponding to the horizontal cross section of the fuel transfer cylinder 9 and the fuel supply cylinder 11 including the bulging cylinder portion 9a. As a result, the ash collection box 18 is accommodated inside the support base 1 without any trouble in a state in which the fuel transfer cylinder 9 and the fuel supply cylinder 11 are removably inserted into the notch 18b, and the upper ash discharge path 17 All of the ash B falling through the ash discharge path 17 can be reliably recovered. Further, the lid body 19 is attached to the support base 1 in a state where the outlet 1b can be opened and closed by a trillion number 23.

In FIG. 4 showing a cross-sectional view taken along the line IV-IV in FIG. 3, the ash collection box 18 is formed by a pair of slide guide rails 1a integrally projecting from the opposing side surface of the support base 1 so as to face opposite edges. As shown in FIG. 3, four guide rollers 21 are slidably brought into contact with the lower surface so that the support base 1 can be easily taken out and stored. ing. When the ash B is almost full in the ash collection box 18, as shown in FIG.
After opening 9, the ash collection box 18 can be taken out of the support 1 by pulling the handle 18a, and the ash B in the ash collection box 18 can be removed. The removal operation of the ash B in the ash collection box 18 can be easily performed in a very short time in a state where the combustion operation of the solid fuel F is continued, so that the combustion operation is continuously performed while maintaining a high combustion efficiency for a long period of time. As a result, the thermal energy of the combustion gas G generated by the combustion of the solid fuel F can be used for various applications.

  FIG. 6 is a longitudinal sectional view showing a solid fuel combustion apparatus according to a second embodiment of the present invention, in which the same or corresponding parts as those in FIG. Is omitted. This combustion apparatus has a structure in which a centrifugal combustion mechanism is connected to the upper end surface of the outer cylinder 3 of the first embodiment. In the centrifugal combustion mechanism, a cylindrical auxiliary outer cylinder 24 having the same cylindrical shape as that of the outer cylinder 3 and a cylindrical auxiliary intermediate cylinder 28 having an inner diameter substantially the same as the inner diameter of the discharge port 3b of the outer cylinder 3 are concentric. Between the auxiliary exterior cylinder 24 and the auxiliary intermediate cylinder, an auxiliary air flow path 28 having an annular space wider than the air flow path 12 of the first embodiment is provided. The blower 13 for supplying high-pressure air A to the auxiliary air flow path 28 is attached to the auxiliary exterior cylinder 24.

  In the centrifugal combustion mechanism, the air A supplied at a high pressure from the blower 13 rises as a high-speed primary swirling air flow A1 in the auxiliary air flow path 28, and then the flow guide portion 24a at the upper end of the auxiliary exterior cylinder 24. Is introduced into the auxiliary intermediate cylinder 27, descends as a secondary swirling air flow A2 along the inner peripheral wall of the auxiliary intermediate cylinder 27, and burns up from the discharge port 3b of the outer cylinder 3 G is supplied as combustion air. As a result, the incombustible gas portion contained in the combustion gas G rising in the auxiliary intermediate cylinder 27 is further completely burned to become a higher temperature combustion gas G, and the discharge port 24b at the upper end of the auxiliary outer cylinder 24. Released from. In addition, since the ash B by combustion of a heavy substance or an inorganic substance is not blown up to the auxiliary intermediate cylinder 27, it is not necessary to provide the ash B collecting function in the centrifugal combustion mechanism.

  FIG. 7 is a front view showing a solid fuel combustion apparatus according to a third embodiment of the present invention. This combustion apparatus has the same structure as that of the combustion apparatus according to the second embodiment of the present invention shown in FIG. 6, and the upper end portion of the auxiliary outer cylinder 24 of the centrifugal combustion mechanism in this combustion apparatus is the same as that of the second embodiment. A centrifugal combustion mechanism similar to that shown in the drawing, that is, a centrifugal combustion mechanism comprising a second auxiliary outer cylinder 29 and a second auxiliary intermediate cylinder (not shown) having substantially the same structure as the auxiliary outer cylinder 24 and auxiliary intermediate cylinder 27 is connected. Has been. The high-temperature combustion gas G discharged from the discharge port (not shown) of the second auxiliary exterior cylinder 29 is sent to the heat exchanger 31 through the connection duct 30 and is converted into a fluid flowing in the heat exchanger 31. Exhaust gas is generated through heat exchange to give its own heat energy. This exhaust gas is fed to the cyclone dust collector 32 and separated into clean gas and dust (dust) by centrifugal force. The dust falls from the take-out portion 33 and is discharged, and the clean gas is sucked into the induction blower 34. After that, it is discharged from the exhaust pipe 37 to the atmosphere.

  Further, the supply side end portion (the right end in the figure) of the fuel transfer cylinder 9 is connected to and connected to the fuel supply portion 38 a at the lower end portion of the fuel hopper 38, and the other end portion of the screw 8 housed in the fuel transfer cylinder 9. (The right end in the figure) is connected to the drive motor 39. The drive motor 39 is rotationally driven according to the required supply amount of the solid fuel F experimentally obtained in advance. That is, the necessary supply amount per unit time for each type of solid fuel F is experimentally determined in advance based on the capacity of the combustion cylinder 11 and the combustion efficiency for each type of solid fuel F to be supplied. The drive motor 39 is rotationally controlled so that only the supply amount of solid fuel F can be supplied by rotating the screw 8. At this time, the rotation of the drive motor 39 is controlled based on operating conditions set to rotate either continuously at a required rotational speed or intermittently at predetermined time intervals.

The combustion apparatus according to the third embodiment can continuously generate a high-temperature combustion gas G as described below, and various industrial products can be obtained by heat exchange of the thermal energy of the combustion gas G. It is intended to be used for applications. That is, as described in the first embodiment, the solid fuel F in the combustion cylinder 11 is burned by the centrifugal combustion method by supplying the tertiary swirling air flow A3, so that the combustion gas G swirls in a spiral shape and the reverse tornado. The ash B that is rolled up in a shape and blown radially outward by the centrifugal force of the combustion gas G at this time hits the inner peripheral wall of the intermediate cylinder 4 to reduce the kinetic energy, and the ash collection box 17 from the ash discharge passage 17 18, the combustion cylinder 11 is always maintained in a state in which the ash B is excluded, and the solid fuel F is continuously burned with high efficiency over a long period of time, so that the high-temperature combustion gas G is stabilized. Continue to be generated. Moreover, the combustion gas G released upward from the upper end opening of the outer cylinder 3 is second-staged by the auxiliary outer cylinder 24 and the auxiliary intermediate cylinder 27 connected to the upper side of the first-stage outer cylinder 4. When passing through the third stage centrifugal combustion structure by the centrifugal combustion structure and the second auxiliary exterior cylinder 29 and the second auxiliary intermediate cylinder (not shown), the incombustible or noncombustible gas contained in the combustion gas G It is possible to stably and continuously generate the combustion gas G that has been completely burned and has a required high temperature.

  The above-described high-temperature combustion gas G is supplied to the heat exchanger 31 and performs heat exchange so as to give its own heat energy to the fluid passed through the heat exchanger 31. In the heat exchanger 31, for example, high-temperature water or steam is generated by heating the supplied water with heat transfer of the thermal energy of the combustion gas G, or the supplied air is converted into thermal energy of the combustion gas G. It is possible to generate warm air by heating with heat transfer. The high-temperature water, steam, or hot air generated by the heat exchanger 31 can be suitably used for various industrial applications such as air conditioning. Further, in this combustion apparatus, the air pressure is discharged from the exhaust pipe 37 by the direction in which the air A supplied from the blower 13 provided in each of the three-stage centrifugal combustion mechanisms is pushed into the apparatus and the exhaust gas suction direction by the induction blower 34. Therefore, the reverse smoke from the combustion cylinder 11 to the fuel transfer cylinder 9 is effectively prevented.

  The present invention is not limited to the contents shown in the above embodiment, and various additions, modifications, or deletions are possible within the scope not departing from the gist of the present invention. Included within the scope of the book.

  The solid fuel combustion apparatus of the present invention can always produce a high-temperature combustion gas by burning a solid fuel such as an inexpensive wooden chip or wood chip with a high efficiency over a long period of time. Therefore, a liquid fuel such as petroleum or heavy oil is used. Alternatively, high-temperature combustion gas required for various industrial uses such as air conditioning can be supplied without using a gaseous fuel such as natural gas.

DESCRIPTION OF SYMBOLS 1 Support stand 3 Exterior cylinder 3a Flow guide part 4 Intermediate cylinder 9 Fuel conveyance cylinder 10 Fuel supply cylinder 11 Combustion cylinder 12 Air flow path 13 Blower 17 Ash discharge path 18 Ash collection box 18a Notch-shaped part 24 Auxiliary exterior cylinder 24a Flow guide portion 24b Discharge port 27 Auxiliary intermediate cylinder 28 Auxiliary air flow path 31 Heat exchanger 32 Dust collector 37 Exhaust pipe 34 Induction blower F Solid fuel

Claims (4)

A cylindrical outer cylinder and an intermediate cylinder smaller in diameter than the outer cylinder are arranged concentrically, and an air flow path in an annular space is provided between the outer cylinder and the intermediate cylinder,
A blower is provided in an arrangement for supplying air toward a range in an inscribed direction of the exterior cylinder and an circumscribed direction of the intermediate cylinder with respect to the air flow path,
A flow guide portion that guides air toward the inner peripheral wall of the intermediate cylinder is provided at the upper end of the air flow path,
Inside the intermediate cylinder, a combustion cylinder having a small diameter and cylinder height with respect to the intermediate cylinder is concentrically arranged at a position below the intermediate cylinder, and the intermediate cylinder and the intermediate cylinder An ash discharge path in the annular space is provided between the combustion cylinder,
A solid fuel supply cylinder is connected to and communicated with the lower end opening of the combustion cylinder,
A solid fuel combustion apparatus, wherein an ash collection box for collecting ash is detachably provided below the ash discharge path. The outer cylindrical body and the intermediate cylindrical body are supported on the upper end surface of a support base having a rectangular horizontal section,
A fuel transfer cylinder that is provided in a penetrating state on the support base and transfers solid fuel continuously or intermittently is connected in communication with the lower end opening of the fuel supply cylinder,
2. The ash collection box according to claim 1, wherein the ash collection box has a notch-like portion into which the fuel supply cylinder and the fuel conveyance cylinder can be inserted and retracted, and is housed and supported in the support base so as to be able to enter and exit. Solid fuel combustion equipment. An auxiliary outer cylinder having the same diameter as the outer cylinder and an auxiliary intermediate cylinder having an inner diameter corresponding to the discharge port at the upper end of the outer cylinder are arranged concentrically, and the auxiliary outer cylinder and the auxiliary An auxiliary air flow path in an annular space between the intermediate cylinder is provided, and air is directed to the auxiliary air flow path in a range in an inscribed direction of the auxiliary outer cylinder and an outer circumscribed direction of the auxiliary intermediate cylinder. Centrifugal combustion in which a blower is provided in an arrangement for feeding, and a flow guide portion is provided at the upper end portion of the auxiliary exterior cylinder to guide the air from the auxiliary air flow path toward the inner peripheral wall of the auxiliary intermediate cylinder. Has a mechanism,
3. The solid fuel combustion apparatus according to claim 1, wherein one or a plurality of the centrifugal combustion mechanisms are connected to an upper end portion of the outer cylinder in a communicating state. A heat exchanger to which the combustion gas discharged from the discharge port of the outer tube or the auxiliary tube is guided,
A dust collector for separating the exhaust gas after heat exchange in the heat exchanger into dust and clean gas;
The solid fuel combustion apparatus according to any one of claims 1 to 3, further comprising an induction blower that sucks clean gas in the dust collector and discharges it from an exhaust pipe.

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