JP5322125B2 - Granular combustion equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new combustion technique for granular fuel which allows local production for local consumption of various renewable energies which are easily available at low cost, such as wood chips and chaffs varied in shape and dimension, as well as woody pellets molded in fixed shapes and dimensions, and which allows high-temperature and high-efficiency combustion of such powder and granular fuels within a combustion chamber without generation of clinker. <P>SOLUTION: The granular fuel combustion device 1 includes: a fuel charging mechanism 8 capable of charging granular fuel V toward a combustion area 22 of the combustion chamber 2; an air supply fan 3 capable of force-feeding outside air toward the combustion area 22, which is provided at a proper position on the upper side of the combustion chamber 2; and a fuel stirring machine 4 including a rotating shaft 41 suspended from a stirring drive source 40 disposed at a proper position on the upper side of the combustion chamber 2 to a position slightly out of the combustion area 22 within the combustion chamber 2 and a stirring bar 42 reaching the combustion area 22, the stirring bar being integrated to the lower end of the rotating shaft 41. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

    The present invention relates to a combustion technique of granular fuel or powdered fuel, and in particular, enables granular fuel or powdered fuel to be burned efficiently and stably in a combustion chamber such as a boiler, a stove, or a combustion furnace. In addition to the field of manufacturing and providing combustion equipment for granular fuel, etc., from the field of providing and selling equipment and instruments necessary for its transportation, storage, assembly and installation, to those materials, machinery and parts Necessary materials such as wood, stone, various fibers, plastics, various metal materials, etc., electronic components incorporated in them, control-related equipment integrated with them, various measuring instruments, Fields generally referred to as industrial machinery, such as the field of power machines that move equipment and appliances, the electric power that is used as energy, the energy that is the source of energy, and the field of oil. Garbage waste generated from the operation and operation of equipment, equipment, etc. In addition to the fields related to the collection and transportation of materials, the recycling field that efficiently recycles these wastes, and the new fields that cannot be envisaged at the present time, there are no unrelated technical fields.

(Points of interest)
Growing facilities such as greenhouse horticulture and other greenhouses for greenhouse farming and glass greenhouses are indispensable for the whole day of the year for temperature, humidity, shading, ventilation, irrigation, fertilization, pest prevention, etc. It is not an exaggeration to say that proper room temperature control in winter is the most important issue, and it has been easier to transport and handle kerosene, light oil, heavy oil, etc. In recent years, fossil fuels suitable for automatic combustion control have been widely used, but in recent years, from the viewpoint of consideration for the natural environment and economic efficiency, it is possible to regenerate with the goal of using large power and moving away from fossil fuels. The use of energy has been encouraged, and full-scale use of wood pellets made from recycled thinned wood and wood construction waste has been sought and put to practical use, but wood pellets are granular. Have Therefore, it is difficult to stabilize and automatically control the fuel supply. In particular, the wood pellets burn at a high temperature reaching 1200 ° C. in the combustion chamber, so that the plant fibers of the wood pellets and mineral components such as silicon and calcium gradually increase. There was a big problem that it became lumped coal ash and caused clinker, which hindered the continuous fuel supply over a long period of time and hindered efficient continuous combustion.

(Conventional technology)
Reflecting this situation, proposals that can be used to overcome this situation are not unheard of.
For example, as typified by the one proposed in Patent Document 1 (1) below, the rooster arranged on the bottom surface of the combustion chamber can be rotated, and the wood pellets are stirred with the stirring piece arranged on the upper surface of the rooster. As shown in Patent Document 1 (2), a vent hole penetrating vertically is formed in the bottom surface of the combustion chamber, and air from the blower is pumped into the combustion chamber from below the bottom surface of the combustion chamber. Combustible ash is stirred with buoyancy, or wood pellets can be dropped and supplied under a pellet tank that can contain wood pellets as seen in Patent Document 1 (3). It has a vertical inner cylinder and an outer cylinder that is concentrically arranged with the inner cylinder so that the outside air can be supplied in a descending manner. A stir bar is provided. Etc. such suggested solutions that shaft and horizontal stirring rod is formed so as to rotated immediately above the combustion stage is also scattered.

However, in the combustion apparatus as shown in the former Patent Documents 1 (1) and 1 (2), a rooster is arranged on the bottom surface of the combustion chamber, and further, an air supply path, a rooster and an agitating piece thereof are provided thereunder. It is necessary to provide a drive mechanism or drive source for rotationally driving, and it is difficult to lower the floor of the combustion chamber. In addition, there is a drawback in that the size and weight and space saving are obstructed, such as increasing the number of pipes and louvers, and the combustion apparatus represented by the latter patent document 1 (3) is directly above the combustion bed. Since the rotary shaft and horizontal stirrer are placed on the top, the lower end of the horizontal stirrer and rotary shaft is always in flame during the combustion of the combustion device when burning with high efficiency for a long time. From the fact, exposed to high temperatures for a long time, it had a fatal disadvantage that fear that deformed and 熔損.
(1) JP 2006-317025 A (2) JP 2010-78269 (3) JP 2011-2183

(Awareness of problems)
As described above, all of the various combustion devices that have been proposed in the past have provided a drive source for the aeration path and the stirring mechanism for wood pellets under the bottom chamber of the combustion chamber, thereby reducing the floor of the combustion chamber. In order to ensure safety, it is necessary to carry a dangerous work of transporting heavy wood pellets to high places. Installation is indispensable, and a material that has excellent heat resistance that can withstand high temperatures exceeding 1200 ° C for a long time should be selected for a shaft that can be driven by rotating a rotating shaft directly above the combustion bed. As a result, we have been involved in the development and provision of a highly efficient and fuel-efficient combustion device for granular fuel for a variety of users for many years. This time Based on various knowledge and information obtained from users, it is not limited to wood pellets, but until now it has been disposed of as industrial waste until now. Regarding the configuration to enable highly efficient combustion using various flammable wastes, including flammable materials, as well as being more economical and easy to operate from the manufacturing process, and having high durability. I realized the need for improvement.

(Object of invention)
Therefore, the present invention is not limited to wood pellets molded and processed into a fixed shape and size, and various renewable energy resources such as wood chips and rice husks that are not fixed in shape and size are locally produced. In addition to being able to extinguish, these granular fuels do not cause clinker piles in the combustion chamber, and it is not possible to develop new combustion technology for granular fuel that enables high temperature and high efficiency combustion Based on the judgment of heels, the development and research have been started quickly, and after many years of trial and error and numerous trials and experiments, this time, we finally realized a combustion device for granular fuel with a new structure. In the following, the configuration will be described in detail together with an embodiment representative of the present invention shown in the drawings.

(Structure of the invention)
As will be clearly understood from the embodiments representing the present invention shown in the drawings, the combustion apparatus for granular fuel according to the present invention basically comprises the following configuration.
That is, a fuel injection mechanism that can automatically input an appropriate amount of granular fuel toward the combustion zone on the bottom of the combustion chamber furnace is provided. The air supply pipe is extended to a location where continuous supply of forcedly pumped air toward the furnace bottom combustion zone is possible, and from the stirring drive source placed at the right side of the combustion chamber from the combustion zone above the furnace bottom. A fuel stirrer is provided in which the rotating shaft is suspended in a vertical posture at a position slightly off in the direction, and a stirring bar having a length reaching the vicinity of the combustion area on the bottom of the furnace is integrated in a substantially horizontal posture at the lower end of the rotating shaft. It is a combustion apparatus for granular fuel which makes a summary the composition made up.

    In this granular fuel combustion device, the fuel injection mechanism that can automatically supply an appropriate amount of granular fuel toward the combustion zone on the bottom of the combustion chamber is provided. Extending the supply pipe from the supply fan arranged at the right position on the combustion chamber to the point where the air forcedly pumped by the supply fan can be continuously supplied toward the combustion area on the bottom of the furnace, A rotary shaft is suspended in a vertical position at a position slightly deviated horizontally from the combustion area above the furnace bottom from the stirring drive source arranged at an appropriate position on the combustion chamber, and combustion at the bottom of the furnace is performed at the lower end of the rotary shaft. A fuel stirrer that is integrated in a substantially horizontal position with a stir bar that reaches the vicinity of the zone is provided, and in the process of burning granular fuel supplied to the combustion zone on the bottom of the furnace by the fuel input mechanism, the stir bar is Rotating around the axis with a predetermined radius including the combustion zone, The particulate fuel combustion system comprising a particulate fuel from a configuration in which the ones stirrable.

    As described above, according to the combustion apparatus for granular fuel of the present invention, unlike the conventional one, the air supply fan is directed toward the combustion area on the combustion chamber furnace bottom from the unique characteristic configuration as described above. The agitation bar at the lower end of the rotating shaft that suspends the granular fuel supplied to the combustion zone by the fuel injection mechanism from the agitation drive source on the combustion chamber is driven to rotate in a substantially horizontal position, and the agitation is performed. High efficiency combustion and high heat generation can be achieved by continuously supplying the outside air uniformly between the granular fuels in the same combustion zone to promote complete combustion, and supplying only a very small amount of granular fuel per unit time slowly and continuously. In addition to being able to maintain the quantity over a long period of time, in the conventional combustion apparatus, the granular fuel being burned burns the clinker, which is massive coal ash, and the fuel supply is smooth Hindering The technical problem of hindering continuous continuous combustion remains, but even if such a phenomenon that generates clinker is eliminated or generated, it is stopped to a very small amount. In this way, the clinker is agglomerated so that the problem that it becomes an obstructive factor for continuous combustion is surely solved, and smooth and continuous high-efficiency combustion can be surely achieved. Is obtained.

    In addition, since the supply fan and the agitation drive source for the fuel agitator are arranged on the upper side of the combustion chamber furnace bottom, the structure under the combustion chamber furnace bottom is simplified and the floor can be easily lowered. It is possible to achieve a drastic reduction in size and weight of the external body of the combustion device for granular fuel, and it is possible to install a fuel injection mechanism at a lower level, which significantly reduces the labor burden of supplying heavy granular fuel. The effect of being able to be produced.

    In addition, the fuel agitator has a length that reaches the vicinity of the combustion zone at the lower end of the rotating shaft while hanging from the lower end of the rotating shaft in a vertical posture to a position slightly deviated horizontally from the combustion area above the furnace bottom in the combustion chamber. Since the stirring bar is integrated in a substantially horizontal posture, the lower end of the rotating shaft is not directly exposed to the granular fuel combusting in the combustion zone, and the rotating stirring bar is cooled every time after passing through the combustion zone. Therefore, the lower end of the rotating shaft and the stirring bar can be prevented from being exposed to high temperature for a long time, and it is possible to achieve a much longer life by avoiding deterioration, deformation, breakage, etc. due to overheating. It can be tempered and economically advantageous.

    Furthermore, in the case of incorporating an expansion / contraction adjustment mechanism that can be expanded and contracted and temporarily fixed to an arbitrary length on the agitation bar of the fuel agitator, various granular fuels composed of powders / grains of various shapes and sizes, or mixtures thereof The rotating radius of the agitation bar can be freely adjusted according to the area of the combustion chamber combustion zone, which can be changed in various ways depending on the type, and the granular fuel can be agitated more reliably to realize more efficient combustion. The effect that it becomes possible will also be produced.

    In addition, the combustion zone supply device provided in the combustion chamber can more reliably guide and transport the granular fuel introduced from the fuel injection mechanism into the combustion chamber to the combustion zone, thereby making the granular fuel smoother and wasteful. In addition, the cylindrical spacer blades of the combustion zone supply machine can ensure a very stable operation without clogging or clogging of granular fuel, There are no defects such as uncertain supply, and the blades can reliably transfer and supply minute amounts of granular fuel, and those equipped with a combustion ash discharge unit and combustion ash discharger are combustible. The combustion ash generated in the area is automatically and quickly removed, new granular fuel can always be supplied to the combustion area, and the combustion ash can be easily and safely taken out and disposed of. Intercostal wings The combustion ash can be discharged slowly and reliably, providing a combustion device for granular fuel with significantly improved combustion efficiency and safety. In addition, both the combustion zone supply device and the combustion ash discharge device are provided. The granular fuel combustion apparatus has the respective characteristics, and ensures more efficient combustion.

In implementing the present invention having the above-described configuration, the best or desirable mode will be described.
The combustion chamber is supplied with granular and / or powdery fuel, efficiently burns the fuel, and air, water or oil in which the heat generated by the combustion flows into the combustion apparatus for the granular fuel, It has a function to enable high-efficiency transmission to other heat media, and more specifically, it forms the main part of boilers, stoves, combustion furnaces, etc. Without providing it, it must be as low as possible, and as shown in the examples described later, it penetrates only the work opening and closing door, the fuel input mechanism connection part, the air supply pipe connection part, the fuel agitator incorporation part, etc. It must be open, otherwise it can be hermetically enclosed by a heat-resistant peripheral wall, and a combustion zone must be secured in place on the combustion chamber furnace bottom. Around the combustion zone It can be made in which a combustion zone feeder and ash discharger at.

    The fuel injection mechanism has the function of automatically supplying granular and / or pulverized fuel per unit time to the vicinity of the combustion zone on the bottom of the combustion chamber furnace, and allows the granular and / or pulverized fuel to be supplied. It must be able to be supplied smoothly without clogging, etc., and as shown in the examples to be described later, it is possible to rotationally drive the cylindrical spacer blade and to have a fire extinguishing device for preventing the spread of fire In addition, although not shown in the figure, it is possible to incorporate a coreless spiral conveyor or a shafted screw conveyor, etc. In order to reduce the burden, it should be installed as low as possible.

    The supply air fan has a function to enable a sufficient amount of air outside the combustion chamber to be forced and fed toward the combustion area above the combustion chamber furnace bottom, at least above the combustion chamber furnace bottom. An air supply pipe that is grounded on the chamber and extends to the vicinity of the combustion area in the combustion chamber is provided, and the air supply pipe has a fire resistance at least from the penetration part of the wall of the combustion chamber to the tip part that reaches the vicinity immediately above the combustion area. It must be made of excellent metal materials or ceramics.

    The fuel stirrer is supplied to the combustion zone on the bottom of the combustion chamber, and the burning granular and / or powdery fuel is stirred so that the clinker is not fired. It is responsible for the ability to combust in general, at least above the bottom of the combustion chamber furnace, preferably from a stirring drive source arranged at a suitable location on the combustion chamber, slightly in the horizontal direction from the combustion area on the bottom of the furnace. The rotating shaft is suspended in a vertical posture at a position deviating from the above, and a stirring bar having a length reaching the vicinity of the combustion area on the bottom of the furnace is integrated into a substantially horizontal posture at the lower end of the rotating shaft. As shown in the examples to be described later, an expansion / contraction adjustment mechanism that can be expanded and contracted and temporarily fixed to an arbitrary length can be incorporated into the stirring bar so that the rotation radius is variable.

    The rotating shaft of the fuel agitator is responsible for transmitting the power of the agitation drive source placed at the right position on the combustion chamber to the agitation bar near the combustion area on the bottom of the furnace, with a gear mechanism, link mechanism, wire shaft, In addition to a universal joint mechanism using a coil spring shaft, a bearing mechanism such as a bearing, a heat-resistant seal, etc., as well as corresponding to the combustion chamber directly above, as shown in the embodiments described later. A combustion drive unit for granular fuel may be provided with an agitation drive source on the top wall of the exterior body, penetrate the exterior body top surface wall and the combustion chamber top wall from the agitation drive source, and be suspended downward. Good.

    The agitation bar of the fuel agitator is capable of receiving the rotational force transmitted from the agitation drive source via the rotation shaft and agitating the granular and / or powdery fuel supplied to the vicinity of the combustion chamber on the combustion chamber bottom. It must be attached to the lower end of the agitation drive source rotating shaft in the form of a horizontal rod, outside the rod shape, horizontal plate shape, inclined airfoil shape, airfoil shape, curved plate shape, comb shape, pipe It can be of various shapes such as a shape, a coil shape, etc., and it can be detachably attached to the stirring drive source rotation shaft by providing an attachment / detachment mechanism, more specifically, A slide bar incorporating a temporary fixing mechanism in the horizontal guide rail portion is attached to be freely slidable / retractable / temporarily fixed to form an expansion / contraction adjustment mechanism, or, as shown in the examples described later, stirring Drill a female screw hole that runs vertically through the bar, and in the female screw hole, And the like are possible to be assumed that form a telescopic adjusting mechanism with screwed retractable bolt screwed-fit nut.

    The combustion zone supply machine has a function of forcibly transferring an appropriate amount of granular and / or pulverized fuel introduced into the combustion chamber from the fuel injection mechanism to the combustion region on the bottom of the combustion chamber. The granular and / or pulverized fuel must be able to be transported smoothly between the bottom of the combustion chamber and the combustion chamber without clogging, and as shown in the examples described later, Between the granular and / or pulverized fuel charging position in the combustion chamber and the combustion zone on the bottom of the combustion chamber, a cylindrical spacer blade with a blade projecting is disposed, and the cylindrical spacer blade is placed outside the combustion chamber. It is preferable that an output shaft extended from a distributed rotational drive source is connected.

    The combustion ash ejector smoothly and quickly removes particulate and / or powdery fuel combustion ash generated in the combustion zone on the bottom of the combustion chamber furnace, and new granular fuel is supplied to the combustion zone. It is different from the position where granular and / or powdery fuel is charged from the fuel charging mechanism in the combustion chamber and the position where the combustion zone feeder is arranged. The combustion chamber furnace must be arranged at a suitable location around the combustion zone on the bottom of the combustion chamber, and is different from the granular and / or pulverized fuel input position in the combustion chamber, as shown in the embodiments described later. A combustion ash discharge section is provided at a suitable location around the combustion zone on the bottom, and a cylindrical spacer blade with a blade projecting between the combustion zone and the combustion ash discharge section is disposed outside of the combustion chamber. Connected to the output shaft extended from the rotational drive source To that it is desirable.

The combustion ash discharge unit can safely discharge the granular and / or pulverized fuel combustion ash that has been burned in the combustion zone in the combustion chamber to the outside of the exterior body even during the combustion of the granular fuel combustion device. It is desirable that an appropriate amount of combustion ash can be temporarily accumulated and stored, and that the combustion ash can be taken out of the exterior body by opening a discharge door or the like.
In the following, the structure of the present invention will be described in detail together with an embodiment representative of the present invention shown in the drawings.

The drawings show a typical embodiment that embodies the technical idea of the granular fuel combustion apparatus of the present invention.
It is a front view which shows the combustion apparatus for granular fuel in section. It is a top view which shows the combustion apparatus for granular fuel. It is a side view which cuts and shows the combustion apparatus for granular fuel.

    In the example shown in FIG. 1 to FIG. 3, the fuel injection mechanism 8 that can input granular fuel V toward the combustion chamber 2 combustion zone 22 is provided, and the air supply fan 3 that can pump external air toward the combustion zone 22 is provided in the combustion chamber 2. The rotary shaft 41 is suspended at a position slightly above the combustion zone 22 in the combustion chamber 2 from the stirring drive source 40 disposed at the proper location on the combustion chamber 2 and at the lower end of the rotary shaft 41. A typical embodiment of the combustion apparatus for granular fuel according to the present invention, in which the fuel agitator 4 in which the agitation bar 42 reaching the combustion zone 22 is integrated, is provided.

    As can be clearly understood from what has been taken up in FIGS. 1 to 3, the combustion apparatus 1 for granular fuel according to the present invention incorporates a roll drum type combustion chamber 2 in a rectangular box type exterior body 10 in a range near the front end. An opening / closing door 20 for the combustion chamber 2 is provided in the center of the front, an air circulation path space 11 is formed between the inner wall of the exterior body 10 and the outer wall of the combustion chamber 2, and the center of the top surface of the exterior body 10. An intake duct 13 having a built-in blower fan 12 is erected near the rear end of the combustion chamber 2 and the air supply duct 14 is horizontally extended from the side wall near the rear end of the exterior body 10. As indicated by a chain line arrow, it is assumed that heated air can be sucked into the air circulation path space 11 from the intake duct 13 and sent out from the air supply duct 14, and the outside air supply air supply fan 3 is further provided on the top surface of the exterior body 10. From the air supply fan 3 to the exterior body 10 And the front end of the supply pipe 30 vertically penetrating through the top surface of the combustion chamber 2 is suspended and opened to the combustion chamber 2 directly above the combustion zone 22 above the combustion chamber 2 and from the rear end of the combustion chamber 2 to the exterior body 10. The exhaust line 15 extending through and extending through the rear end wall is guided and extended to the outside through the soot remover 16.

    As shown in FIGS. 1 to 3, an agitation drive source 40 is fixed on the top surface of the exterior body 10 corresponding to a position directly above the center of the combustion chamber 2, and the exterior body 10 and the combustion chamber 2 ceiling are fixed from the agitation drive source 40. The lower end of the rotating shaft 41 penetrating vertically through the surface and extending vertically is placed at a position slightly deviated in the horizontal direction from the combustion region 22 on the furnace bottom 21, and the lower end of the rotating shaft 41 is A fuel stirrer 4 is formed by integrating a stirring bar 42 having a length reaching the combustion zone 22 on the furnace bottom 21 in a substantially horizontal posture, and a female screw hole is vertically passed through the center of the stirring bar 42 and a set nut is screwed. An expansion / contraction adjustment mechanism 43 is incorporated, in which an advance / retreat bolt 44 longer than the attached stirring bar 42 can be moved forward and backward, and can be temporarily fixed by the retaining nut.

    As shown in FIG. 1, the lower end of the dropping pipe 82 of the fuel hopper 80 including the relay container part 81 and the dropping pipe 82 suspended from the relay container part 81 from the outer side of the exterior body 10 is located above the horizontal surface. With respect to the fuel hopper 80 relay container portion 81, the fuel hopper 80 relay container portion 81 is fixed to the fuel hopper 80 by connecting it through and connecting it so that it is directed slightly in front of the combustion zone 22 near the center in the combustion chamber 2. At an appropriate upper position, there is a built-in fuel input mechanism 8 so that a fuel accommodating portion 90 replenishment hole 91 of a particulate fuel intermittent transfer machine 9 to be described later faces the upper end opening of the drop pipe 82. Further, the fuel input mechanism 8 fuel hopper 80 When the relay container 81 reaches the granular fuel V ignition temperature, the fire extinguishing sensor 84 that automatically detects and opens the normally closed electromagnetic valve when the relay container 81 reaches the granular fuel V ignition temperature, and the fire extinguishing sensor. An automatic fire extinguishing mechanism 83 including a fire extinguishing hose 85 capable of pumping fire extinguishing water into the relay container 81 through 84 is incorporated.

    As shown in FIGS. 1 and 2, the granular fuel intermittent transfer machine 9 is formed of a rectangular box body with a top surface open, and a fuel storage section 90 that vertically penetrates a supplementary hole 91 having a predetermined diameter at the bottom of the rectangular box body. Of a horizontal cylindrical idler cylindrical face having a predetermined diameter, which is secured on a horizontal bottom surface in the fuel accommodating portion 90 facing the vicinity of the replenishment hole 91 and is supported rotatably around a horizontal axis. A cylindrical blade 50 is formed by providing one blade 51 parallel to the axial center and projecting in the centrifugal direction from the outer peripheral wall, and at least one shaft end of the cylindrical spacer 50 is provided with a replenishing rotational drive. The output shaft 60 of the power source 6 is connected, and the left and right sides of the bottom surface of the fuel accommodating portion 90 between the cylindrical interposing blade 50 blade 51 and the replenishing hole 91 are crossed, and left and right guide protrusions 92 and 92 are projected. At the same time, a fuel dam is provided in the fuel accommodating portion 90 of each of the left and right guide ridges 92, 92 or more. When a partition wall 93 is formed, a fuel weir port 94 is formed by surrounding the bottom surface of the fuel accommodating portion 90, the left and right guide ridges 92, 92, and the lower end edge of the partition wall 93, and power is supplied to the replenishment rotary drive source 6, The mold blade 50 is driven to rotate at a predetermined rotational speed.

    As shown in FIGS. 1 to 3, the combustion chamber 2 has a combustion zone supply unit 5 and a combustion ash discharger 7, and the combustion zone supply unit 5 has a combustion chamber 2 granular fuel combustion zone. 2 and the fuel injection mechanism 8 between the fuel hopper 80 and the dropping position 82 of the granular fuel V from the dropping pipe 82 (the right side of the combustion chamber 2 in FIG. The outer end of the outer body 10 is penetrated through the front wall of the outer body 10 from the rotational drive source 6 disposed in front of the outer wall 10 and the front end of the extended output shaft 60 is connected to the cylindrical gap. The intermittent discharger 7 is vertically connected to a position opposite to the combustion zone supply unit 5 with the combustion chamber 2 combustion zone 22 interposed therebetween. Combustion ash provided with a discharge door 71 recessed downward and exposed at the bottom of the exterior body 10 In addition to providing the outlet 70, between the combustion chamber 2 combustion zone 22 and the combustion ash discharge portion 70 (the left inner side of the combustion chamber 2 in FIG. 1), the blade 50 is connected to the blade 51 by the granular fuel. While being disposed in a horizontal posture so as to be immersed in the combustion ash VA, the front end wall of the exterior main body 10 passes through the front wall of the exterior main body 10 from the rotary drive source 6 disposed in front of the outer main body 10, and the tip of the extended output shaft 60 is the cylindrical shape. Connected to the base end of the interspacer blade 50, and by supplying electric power to the rotational drive sources 4, 4 of the combustion zone supply unit 5 and the combustion ash discharger 7, the respective cylindrical interposition blades 50, 50 can be rotationally driven.

(Operation / Effect of Example 1)
The granular fuel combustion apparatus 1 of the present invention configured as described above distributes the outside air evenly between the granular fuels in the combustion region to ensure complete combustion, and supplies a very small amount of granular fuel slowly and without interruption. Just eliminate the phenomenon of generating high-efficiency combustion and high calorific value to generate clinker, or even if it occurs, it will be stopped to a very small amount, and it will be agglomerated like those of this kind of conventional equipment Heating over a long period of time, day or night, to ensure that the situation that would be an obstructive factor for continuous combustion is reliably eliminated and smooth continuous high-efficiency combustion can be achieved. It becomes the most suitable as a heating device for a greenhouse in a cold district that needs to be used.

    As shown in FIGS. 1 to 3, in order to store a sufficient amount of the granular fuel V in the fuel storage unit 90, the user needs to store the fuel. The granular fuel V is lifted and supplied to the portion 90, but the combustion chamber 2 has a lower floor with the bottom surface of the furnace bottom 21 grounded to the bottom of the exterior body 10, so that the supply height of the granular fuel V is remarkably high. Therefore, there is an advantage that the labor load can be greatly reduced and the work can be easily performed.

    After supplying the granular fuel V to the granular fuel intermittent charging device 9 in this way, for example, when a constant power is supplied to the granular fuel intermittent charging device 9, the rotational drive source 6 has a slow and constant rotational speed, for example, 1 minute. The cylindrical intercostal blade 50 rotates slowly at the same speed, and the blade 51 is slowly rotated at the same speed. The outer peripheral wall of the cylindrical intercostal blade 50 not provided with the blade 51 is in contact with the granular fuel V. In this state, the granular fuel V is not transferred, and when the blade 51 comes around and scrapes the granular fuel V, the granular fuel V is scraped out little by little toward the replenishment hole 91, The fuel is quantified through the fuel dam 94 formed by the wall 92 and the partition wall 93, and is intermittently supplied at a rate of once per minute toward the target location for the granular fuel V through the replenishment hole 91. Can be supplied in a drop-off manner, and can be smoothly and intermittently transferred without clogging various powders and granular fuels V such as wood chips and rice husks, not only in wood pellets, and the rotational drive source The granular fuel V supply amount per unit time can be freely adjusted by changing the rotational speed of 6 or changing the shape, dimensions, number of blades 51 and the like.

    As shown in FIG. 1, the granular fuel intermittent dropper 9 of the fuel injection mechanism 8 and the granular fuel V that falls from the fuel storage part 90 replenishment hole 91 by a certain amount per unit time are separated into the fuel hopper 80 relay container part 81 and the drop Since it can be dropped and supplied into the combustion chamber 2 through the pipe 82 and the inclination angle α of the dropping pipe 82 is set to 60 °, a certain amount of the granular fuel V dropped and supplied is Since the fuel hopper 80 relay container 81 and the dropping pipe 82 are all emptied except when the granular fuel V is being dropped and thrown in, the fuel hopper 80 is discharged from inside the combustion chamber 2. The relay container portion 81 can more reliably prevent the spread of fire in the unlikely event of a wrinkle.

    The granular fuel V dropped and supplied from the fuel input mechanism 8 to the combustion chamber 2 is supplied by the cylindrical intercostal blade 50, which receives the rotational driving force of the combustion region supply machine 5 rotational drive source 6, at a constant amount per unit time. The combustion area 22 is transferred to the trap, and the granular fuel V moved to the combustion area 22 can be combusted by receiving fresh outside air from the supply fan 3 supply pipe 30, and the user can burn the combustion area 22 When the 22 granular fuels V are ignited, continuous combustion of the outside air is received and stable combustion is efficiently performed at a high temperature.

    The granular fuel V combusted in the combustion chamber 2 combustion zone 22 is uniformly stirred by the stirring bar 42 at the lower end of the rotating shaft 41 that is rotationally driven at a constant rotational speed of the fuel agitator 4 stirring drive source 40, and the granular fuel V particles Oxygen can be delivered without any gaps, enabling continuous high-efficiency combustion. Further, the expansion / contraction adjusting mechanism 43 built-in nut (not shown) is loosened to advancing / retracting bolt 44. When the locking nut is tightened and temporarily fixed again after adjusting the advance / retreat of the fuel, the amount of the combustion bar 22 that changes depending on the type, shape, input amount, etc. of the granular fuel V is determined according to the size (area) of the combustion zone 22. There is an advantage that the protruding amount of the advance / retreat bolt 44 can be freely adjusted.

    Moreover, as can be clearly understood from FIG. 1, the lower end of the rotating shaft 41 of the fuel agitator 4 is suspended at a position slightly deviated from the combustion zone 22, and the stirring bar 42 rotates once around the vertical axis. Each time the fuel is passed and stirred so as to cross the combustion zone 22, even if the granular fuel V in the combustion zone 22 is continuously burned at a high temperature, it will deviate from that zone after each passage. Since the stirring bar 42 is cooled each time, the lower end of the rotary shaft 41 and the stirring bar 42 are released from the disadvantages such as deterioration, deformation, breakage and the like due to high temperature, and are surely The service life can be extended and the economy is high.

    The granular fuel combustion ash VA completely burned in the combustion chamber 2 combustion zone 22 in this way is operated by the combustion ash discharger 7 rotating at a predetermined rotational speed per unit time by the same operation as the combustion zone feeder 5. The fuel is automatically scraped and discharged toward the combustion ash discharge unit 70, so that new granular fuel V is constantly supplied stably to the combustion zone 22 and combustion at a constant temperature is realized. The combustion ash VA automatically discharged from the combustion zone 22 by the combustion ash discharger 7 is temporarily accumulated and stored in the combustion ash discharge unit 70, and when a certain amount is accumulated, the combustion chamber 2 The user can open the discharge door 71 and take out the combustion ash VA at any time regardless of whether it is during combustion or after extinguishing, and can appropriately dispose of it.

    In the event that the particulate fuel combustion device 1 has spread into the fuel hopper 80 during the combustion operation, the automatic fire extinguishing mechanism 83 detects the high temperature and the fire hose 84 detects the high temperature. 85 is automatically opened and fire extinguishing water is automatically discharged, and the particulate fuel intermittent thrower 9 disposed on the upper part 9 is surely prevented from spreading to the granular fuel V in the fuel accommodating portion 90, and high safety is ensured. It can be secured.

(Conclusion)
As described above, the granular fuel combustion apparatus according to the present invention can achieve the intended purpose evenly by its novel configuration, and is easy to manufacture, simple and inexpensive, and much more economical. In addition, compared to conventional solid fuel combustion technology dedicated to wood pellets, wood chips and rice husks that have so far been unusable as automatic fuel supply for boilers, stoves, etc. As a result, it can be used smoothly, safely and efficiently, and it can be used for local consumption and local consumption as a useful fuel such as thinned wood and agricultural waste generated in local agriculture and forestry. Renewable energy resources such as thinned timber and rice husks, as well as farmhouses that have had to rely on heavy imported fossil fuels and have had to bear a large economic burden For the agriculture and forestry industry, which had to dispose of waste as industrial waste, a path to effective utilization would be opened, and as long as further downsizing and weight reduction were realized, a life friendly to the natural environment would be possible. As the possibility of application to heating of ordinary households and each company facility will be expanded, it will be highly appreciated in the hot water supply equipment industry and the heater industry, and will be widely used and spread. is expected.

1 Combustion device for granular fuel
10 Same exterior body
11 Air circulation path space
12 The same fan
13 Air intake duct
14 Air supply duct
15 Exhaust pipe
16 Smoke remover 2 Combustion chamber
20 Same door
21 The bottom of the furnace
22 Combustion zone 3 Air supply fan
30 Air supply pipe 4 Fuel agitator
40 Same stirring drive source
41 Same rotation axis
42 Stirring bar
43 Same expansion / contraction adjustment mechanism (with female screw hole)
44 Reciprocating bolt (with locking nut)
5 Combustion zone feeder
50 Same cylindrical type intercostal wing (idle cylinder)
51 Same blade 6 Rotation drive source
60 Same output shaft 7 Combustion ash discharge machine
70 Combustion ash discharge section
71 Same discharge door 8 Fuel input mechanism
80 Fuel hopper
81 Same relay container
82 Drop tube α Inclination angle
83 The same automatic fire extinguishing mechanism
84 The fire extinguishing sensor
85 Fire extinguishing hose 9 Spare thrower for granular fuel
90 Fuel storage part
91 Same replenishment hole
92 Guide ridges
93 Same partition
94 Same fuel weir V Granular fuel VA Granular fuel combustion ash

Claims (6)

    A fuel injection mechanism is provided that can automatically inject an appropriate amount of granular fuel toward the combustion zone on the bottom of the combustion chamber. The supply air fan is forced from the supply air fan located at the right side of the combustion chamber. The air supply pipe is extended to a location where continuous supply of air to be pumped to the furnace bottom combustion zone is possible, and from the agitation drive source disposed at a suitable location on the combustion chamber, it is horizontal from the combustion zone on the furnace bottom. The rotary shaft is suspended in a vertical posture at a position slightly deviated in the direction, and a stirring bar having a length reaching the vicinity of the combustion area on the furnace bottom is integrated in a substantially horizontal posture at the lower end of the rotary shaft. A combustion apparatus for granular fuel, comprising a stirrer.     A fuel injection mechanism is provided that can automatically inject an appropriate amount of granular fuel toward the combustion zone on the bottom of the combustion chamber. The supply air fan is forced from the supply air fan located at the right side of the combustion chamber. The air supply pipe is extended to a location where continuous supply of air to be pumped to the furnace bottom combustion zone is possible, and from the agitation drive source disposed at a suitable location on the combustion chamber, it is horizontal from the combustion zone on the furnace bottom. The rotary shaft is suspended in a vertical posture at a position slightly deviated in the direction, and a stirring bar having a length reaching the vicinity of the combustion area on the furnace bottom is integrated in a substantially horizontal posture at the lower end of the rotary shaft. A stirrer is provided, and in the process of burning the granular fuel supplied to the combustion area on the bottom of the furnace by the fuel input mechanism, the stirring bar is rotated around the vertical axis of the rotating shaft at a predetermined radius including the combustion area. Granular fuel characterized in that granular fuel in the combustion zone can be stirred Use the combustion device.     The combustion apparatus for granular fuel according to any one of claims 1 and 2, wherein the fuel agitator incorporates an expansion / contraction adjustment mechanism that is extendable and temporarily fixed to an arbitrary length in the agitation bar so that the rotation radius is variable. .     A combustion chamber furnace having a predetermined diameter and a horizontal cylindrical shape between the position of granular fuel charging from the combustion chamber from the fuel charging mechanism and the combustion zone on the bottom of the combustion chamber toward the centrifugal direction from the outer peripheral wall of the idle cylinder face A cylindrical interposition blade formed by projecting one or a plurality of blades having a shape and a size that is not buffered at the bottom and does not bite granular fuel between the combustion chamber and the bottom of the combustion chamber is disposed. 4. The combustion zone supply device comprising an output shaft extending from a rotational drive source disposed outside the combustion chamber, at least one end of the idle cylinder surface, is provided. 5. The combustion apparatus for granular fuel as described.     A combustion ash discharge section for the granular fuel combustion ash is provided at an appropriate location around the combustion zone on the bottom of the combustion chamber different from the granular fuel injection position from the fuel injection mechanism, and the granular fuel combustion zone and the combustion ash are provided. Granular fuel combustion ash between the combustion chamber and the bottom of the combustion chamber without being buffered at the bottom of the combustion chamber toward the centrifugal direction from the outer peripheral wall of the idle cylinder surface to the predetermined diameter and horizontal cylinder A cylindrical interposition blade formed by projecting one or a plurality of blades having a shape and size that do not bite the cylinder, and a rotational drive disposed outside the combustion chamber at least one end of the cylindrical interposition blade surface cylinder The combustion apparatus for granular fuel according to any one of claims 1 to 3, wherein a combustion ash discharger is connected to which an output shaft extending from a source is connected.     A combustion chamber furnace having a predetermined diameter and a horizontal cylindrical shape between the position of granular fuel charging from the combustion chamber from the fuel charging mechanism and the combustion zone on the bottom of the combustion chamber toward the centrifugal direction from the outer peripheral wall of the idle cylinder face A cylindrical interposition blade formed by projecting one or a plurality of blades having a shape and a size that is not buffered at the bottom and does not bite granular fuel between the combustion chamber and the bottom of the combustion chamber is disposed. A combustion zone supply machine is connected to one end of the idle cylinder face by connecting an output shaft extending from a rotational drive source arranged outside the combustion chamber. On the other hand, it is different from the granular fuel injection position in the combustion chamber from the fuel injection mechanism. A combustion ash discharge unit for granular fuel combustion ash is provided at a suitable location around the combustion zone on the combustion chamber furnace bottom, and a predetermined diameter, horizontal cylindrical shape is provided between the granular fuel combustion zone and the combustion ash discharge unit. From the outer peripheral wall of the idle cylinder face in the centrifugal direction, without buffering at the combustion chamber furnace bottom, A cylindrical intercostal blade formed by projecting one or a plurality of blades having a shape and size that does not entrain the granular fuel combustion ash between them is disposed, and at one end of the cylindrical intercostal blade idler cylindrical face, The combustion apparatus for granular fuel according to any one of claims 1 to 3, wherein a combustion ash discharger is provided which is connected to an output shaft extended from a rotary drive source disposed in the combustion chamber.

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