JP2021116999A - Combustion furnace and combustion method - Google Patents

Abstract

To provide a combustion furnace which prevents generation of dioxin by completely burning a combustion object by making a burning temperature rise, on the other hand, is capable of suppressing de novo synthesis of dioxin by reducing an exhaust temperature from a chimney and further prevents a combustion object accommodation space from being filled with a gas generated from the accommodated combustion object.SOLUTION: The present invention relates to a combustion furnace 1 in which a cylindrical burning wall part 4 capable of holding a combustion object is provided in a central part of a combustion object accommodation space 2 enclosed by an outer wall 3 and the combustion object is burnt in the vicinity of the burning wall part. The combustion furnace comprises: a chimney communicating to an internal space of the burning wall part and extending upward; air supply means 7 capable of supplying air into the combustion object accommodation space; and an air flow passage 9 which communicates from an upper part of the combustion object accommodation space through the outside of the outer wall to a lower part of the internal space of the burning wall part and causes air to flow from an upper side of the combustion object accommodation space to the internal space of the burning wall part.SELECTED DRAWING: Figure 1

Description

The present invention relates to an incinerator. Specifically, the incinerator can be efficiently burned at a high temperature, the exhaust temperature from the chimney can be lowered, and the combustion gas leaks from the incinerator storage space. Regarding incinerators that can prevent.

Small incinerators that have been conventionally used by farmers and schools have low combustion temperatures and tend to emit incomplete combustion gas. In addition, since it is difficult to take measures against dioxins, their use is often restricted. Therefore, it is desired to develop a small incinerator capable of burning the incinerator at a high temperature and reducing the emission of dust and the like.

For the purpose of solving the above problems, for example, a small incinerator as described in Utility Model Registration No. 2550572 has been proposed. This incinerator is provided with a bottom rostrum and a vertical rostrum, and a combustion chamber is provided above the vertical rostrum to sufficiently burn incomplete combustion gas so that harmful gas and the like are not generated.

Combustion temperature, combustion time, stirring conditions, etc. are important factors in order not to generate dioxins in the incinerator. According to the "Guidelines for Prevention of Dioxins Generation Related to Waste Disposal" in January 1997, the combustion temperature is 850 ° C or higher (900 ° C or higher is desirable), the residence time is 2 seconds or longer, and the furnace shape and secondary combustion air are supplied. By considering the method, it is required to effectively agitate the combustion gas and achieve complete combustion.

However, in a conventional small incinerator as described in the above publication, even if the temperature inside the rostrum can be maintained at 850 ° C. or higher, it is difficult to keep the temperature of the entire combustion chamber at 850 ° C. or higher. be. That is, combustion at a low temperature occurs on the space side where the incinerator is housed, and the incompletely burned gas often fills the inside of the furnace and leaks out of the furnace from the vicinity of the incinerator inlet.

In addition, the gas etc. burned in the vertical rostrum is burned by the secondary combustion air supplied from below the rostrum, but the secondary combustion air is directly introduced from the outside air intake port provided below the rostrum and is directly introduced in the vertical rostrum. Or because it is supplied into the bottom rostrum, the temperature in the vicinity of the rostrum is significantly reduced. Therefore, it is presumed that some parts do not reach the above temperature.

Further, the secondary combustion air is introduced into the furnace by the updraft generated by the combustion in the vertical rostrum and guided to the vertical rostrum or the chimney, so that the secondary combustion air and the gas related to incomplete combustion are sufficiently mixed. It is unlikely that it has been done.

On the other hand, when high-temperature incinerator exhaust gas is released to the atmosphere, it is said that the metal in the soot and dust acts as a catalyst to cause de novo synthesis in which dioxins are synthesized from organic matter in the air. This de novo synthesis is said to be most likely to occur at around 300 ° C. Therefore, in a small incinerator, it is necessary to maintain a high combustion temperature in the vicinity of the rostrum and lower the temperature of the exhaust gas discharged from the chimney from the above temperature.

In the incinerator described in the above publication, since a combustion chamber is provided at the lower end of the chimney to promote combustion even in the chimney, the exhaust temperature is increased accordingly. Therefore, the above-mentioned de novo synthesis is also likely to occur.

In addition, the incinerator storage space is often filled with incomplete combustion gas and malodorous gas. In a small incinerator, an incinerator inlet is provided at the upper part or a side portion, and the incinerator is often charged from the incinerator storage space at a predetermined interval during the incinerator operation. At this time, incomplete combustion gas or malodorous gas may leak out of the furnace.

The present invention has been conceived under the above-mentioned circumstances, solves the above-mentioned conventional problems, and completely burns the incinerator by raising the combustion temperature in the furnace to prevent the generation of dioxins. On the other hand, by reducing the exhaust temperature from the chimney, it is possible to suppress the synthesis of dioxin de novo, and further, to provide an incinerator in which the gas generated from the contained incinerator does not fill the incinerator storage space. Make it an issue.

According to the present invention, a tubular combustion wall portion that rises from the bottom and communicates with the inside and outside is formed in the central portion of the incinerator storage space surrounded by the outer wall, and a tubular combustion wall portion that can hold the incinerator is provided. An incinerator in which the incinerator is burned in the vicinity of the above, a chimney that communicates with the internal space of the combustion wall and extends upward, and an air supply means for supplying air into the incinerator storage space. , Communicate from the upper part of the incinerator storage space to the lower part of the internal space of the combustion wall portion via the outside of the outer wall, and flow air from above the incinerator storage space to the internal space of the combustion wall portion. It is configured with an air flow passage.

In the present invention, a tubular combustion wall portion rising from the bottom is provided in the central portion of the incinerator accommodating space surrounded by the outer wall, and the incinerator accommodating space is provided between the outer surface of the combustion wall portion and the inner surface of the outer wall. Provided. The combustion wall portion is configured so that holes communicating with each other inside and outside are formed and incinerated products can be held. Then, the incinerator is burned in the vicinity of the combustion wall portion. Since the air required for combustion is supplied into the combustion wall portion, the incinerator is burned in the vicinity of the combustion wall portion, and the combustion residue is discharged from the hole of the combustion wall portion to the internal space of the combustion wall portion. Is discharged to the bottom of the. Therefore, the combustion residue is automatically removed from the incinerator storage space and the vicinity of the combustion wall portion, and the incinerator can be efficiently burned. The form of the hole is not particularly limited. For example, round bars are arranged in a tubular shape with a predetermined gap (hole), openings (holes) having a predetermined shape are provided in a plate-shaped tubular body at predetermined intervals, or a part or all of the combustion wall is reticulated. It can also be formed into.

Further, in the present invention, an air supply means for supplying air into the incinerator storage space is provided. Since the internal space of the combustion wall portion is connected to the chimney, the inside of the combustion wall portion has a negative pressure with respect to the incinerator accommodating space in a steady combustion state. By providing the air supply means for the incinerator storage space, the incinerator in the vicinity of the combustion wall portion can receive combustion air not only from the internal space side of the combustion wall portion but also from the incinerator storage space side. Be supplied. By supplying combustion air from the incinerator storage space side, combustion of the incinerator in the vicinity of the combustion wall portion can be promoted, and the incinerator can be burned efficiently. In particular, at the time of starting, the internal space of the combustion wall portion is heated by a burner or the like, but by supplying air to the vicinity of the combustion wall portion from the incinerator storage space side, combustion of the incinerator near the combustion wall portion is promoted. Therefore, the time until steady operation can be shortened.

The air supply means can be configured to include an introduction port for introducing outside air, an air supply fan, and an outlet for sending air into the incinerator storage space. Further, it is desirable that the outlet is provided with an upper outlet for supplying air to the upper part of the incinerated material storage space and a lower outlet for supplying air to the lower part of the incinerated material storage space. When the density of the incinerator housed in the incinerator storage space becomes high, the flow resistance of the air in the incinerator increases, and there is a possibility that sufficient air does not flow to the vicinity of the combustion wall portion. By providing the lower outlet, air can be sent to the inside below the incinerator, so that sufficient air can be supplied to the vicinity of the combustion wall. The configuration of the upper outlet and the lower outlet is not particularly limited. For example, while the upper air outlet is provided at the upper end of the incinerated material storage space, a pipe communicating with the upper air outlet is extended along the inside of the outer wall to the vicinity of the bottom of the incinerated material storage space to extend the lower part. The outlet can be configured.

Further, in the present invention, the upper part of the incinerator accommodating space communicates with the lower part of the internal space of the combustion wall portion via the outside of the outer wall, and the internal space of the combustion wall portion is communicated from above the incinerator accommodating space. An air flow passage for flowing air can be provided in the space.

The air flow passage guides the air in the incinerator storage space to the inside of the combustion wall portion. That is, air is sucked out from above the incinerator storage space, and this air is used as combustion air. As a result, incomplete combustion gas and foul odors do not fill the upper part of the incinerator storage space, and the incinerator does not leak to the outside. Further, when steady combustion occurs in the combustion wall portion, the combustion gas flows toward the chimney in the internal space of the combustion wall portion, so that the internal space of the combustion wall portion and the air flow passage are negative. It becomes a pressure, and the air in the incinerator accommodating space is automatically sucked by the negative pressure and guided to the combustion wall portion.

At the time of starting, smoke is likely to be generated because the combustion in the vicinity of the combustion wall portion is not sufficient, and the smoke fills the incinerator storage space to form a gap in the outer wall or an air flow passage leading to the combustion wall portion. The above smoke may leak from gaps and the like. In order to avoid the above inconvenience, the amount of air supplied from the air supply means can be limited, or a flow amount adjusting means for adjusting the amount of air flow can be provided at a predetermined position in the air flow passage. Further, it is possible to provide a flow path switching valve capable of sending air from the air supply means to the inside of the combustion wall portion through the air flow passage without passing through the incinerator accommodating space. As a result, it is possible to prevent the smoke filled in the incinerator storage space from leaking out and to promote combustion. In order to improve the combustion efficiency of the combustion wall portion, an electric fan or the like can be provided in the air flow passage. On the other hand, in the steady state, even if the air supply fan that sends air to the incinerator accommodating space is stopped, the internal space of the combustion wall portion becomes a negative pressure, so that air is sucked from the incinerator accommodating space into the air flow passage. Therefore, outside air can be introduced into the incinerator storage space. Therefore, in the steady combustion state, it is possible to burn the incinerator without using a device such as an electric fan.

Moreover, in the steady combustion state, air is continuously sucked out from the upper part of the incinerator storage space, so even if the inlet is opened to additionally charge the incinerator, incomplete combustion gas or incomplete combustion gas or It is possible to prevent the foul odor from leaking out. By providing a fan in the air flow passage, a large amount of air can be sent into the internal space of the combustion wall portion, and the time until steady incineration can be shortened. Further, the air flow passage may be provided with an air flow amount adjusting means for adjusting the amount of air sent to the combustion wall portion according to the type and amount of the incinerator. For example, an adjusting means capable of adjusting the degree of opening of the suction port can be provided.

Further, by providing the air flow passage along the outer wall, the temperature of the air flowing through the air flow passage is increased. Therefore, the temperature of the combustion air supplied to the internal space of the combustion wall portion rises, and the combustion efficiency can be improved.

A heat insulating wall provided with a predetermined gap is provided so as to surround the outer wall, and the gap is communicated with the incinerator storage space and the internal space of the combustion wall portion to form the air flow passage. Can be configured in. When the above configuration is adopted, the flowing air is further heated and guided to the internal space of the combustion wall portion, so that combustion in the vicinity of the combustion wall portion can be promoted and the combustion efficiency can be further improved. The heat insulating wall may be provided on a part of the outer wall, or may be configured to cover the entire outer wall. Further, the size of the gap constituting the air flow passage is not particularly limited.

Further, since a gap through which air flows is formed between the heat insulating wall and the outer wall, the temperature outside the heat insulating wall does not rise. Therefore, even if it comes into contact with the heat insulating wall, there is no risk of burns.

The combustion wall portion is configured to include a cylindrical lower combustion wall portion and a conical side surface-shaped upper combustion wall portion extending upward from the lower combustion wall portion, and from above the upper combustion wall portion, The chimney can be extended. With this configuration, the area of the combustion wall portion can be set large, and the incinerator efficiency can be improved. It is necessary to form a hole communicating with the internal space in the lower combustion wall portion, but the hole may or may not be formed in the upper wall portion.

Further, it is desirable that a predetermined gap is formed on the side of the upper combustion wall portion and a conical side surface-shaped skirt portion is formed in which the lower portion opens into the incinerator storage space. By providing the skirt portion, it is possible to prevent the incinerator from concentrating around the upper wall portion and closing the hole provided in the upper wall portion. Further, by providing the lower edge of the skirt portion so as to extend outward from the outer peripheral portion of the lower combustion wall portion, the pressure from the upper incinerator is applied to the incinerator around the lower combustion wall portion. It can be prevented from acting. Therefore, it is possible to prevent the density of the incinerator in the vicinity of the combustion wall portion from increasing. With the above configuration, the air from the air supply means can be reliably flowed to the vicinity of the combustion wall portion. As a result, combustion in the vicinity of the combustion wall portion can be promoted and incineration efficiency can be improved. The size of the gap provided between the skirt portion and the upper combustion wall portion is not particularly limited, but it is preferably set to be at least larger than the diameter of the hole provided in the lower combustion wall portion.

An inlet for incinerator is provided in the upper part of the outer wall. In the present invention, since the air in the incinerator accommodating space is sucked into the air flow passage, the incinerator accommodating space can be maintained at a negative pressure. As a result, it is possible to prevent smoke and foul odors from leaking from the incinerator storage space even when the inlet is open.

Further, when the heat insulating wall is provided, the charging port is provided so as to penetrate the outer wall and the heat insulating wall to form a tubular shape having an incinerator charging space inside, and below the incinerator charging space. The inner lid portion provided and the outer lid portion provided above the incinerator charging space can be provided. When the outer lid portion is in the closed state, the inner lid portion is held in the open state toward the internal space, and the outer lid portion is in the open state toward the outer space. At that time, the inner lid portion can be configured to be held in the closed state. By adopting this configuration, when the incinerator is charged, the incinerator storage space is not opened to the atmosphere, and it is possible to prevent smoke and foul odor from leaking from the input port.

The configuration of the outer lid portion and the inner lid portion is not particularly limited. For example, these lids can be connected by a link mechanism.

Further, the input port is provided so as to penetrate the outer wall and the heat insulating wall, and a lid portion for opening and closing the input port is provided on the outside of the outer wall, and the upper edge portion of the input port on the inner surface of the outer wall is provided. It is possible to provide an air blowing means that blows out a layered air flow so as to supply air from the air supply means and cover the inlet.

By adopting the above configuration, the air blown out from the air blowing means flows downward along the inner surface of the inner wall provided with the inlet, and a kind of air curtain is formed. The air flow constituting the air curtain is flowed above the incinerator and along the outer surface of the chimney, and is guided to the air flow passage from the suction port provided in the upper part of the incinerator storage space. As a result, it is possible to prevent foul odors and smoke generated from the incinerator from leaking from the inlet.

The configuration of the air blowing means is not particularly limited, and various means for generating a layered airflow covering the inside of the inlet can be adopted.

In order to lower the temperature of the chimney portion, a cylindrical cooling water flow path can be provided at least outside the chimney in the incinerator storage space. The cooling water flow path communicates with the first flow path in which the cooling water is flowed from above the incineration material storage space toward the lower end of the chimney, and the first flow path, and also in the chimney. A second flow path for flowing the cooling water upward from the lower end portion is provided, and a cooling water discharge port can be provided at the upper end portion of the second flow path. With this configuration, it is possible to reduce the temperature of the chimney and the temperature of the exhaust gas flowing through the chimney to prevent the production of dioxins and the like. Further, since the temperature of the chimney can be lowered, there is an effect that damage due to the heat of the chimney can be prevented.

Further, an annular opening opening in the chimney can be provided at the upper end of the second flow path, and an injection port for injecting cooling water into the chimney can be provided above the annular opening. By injecting cooling water into the chimney, the temperature of the exhaust gas can be further reduced. Further, a part of the incineration ash that flows from the combustion wall portion together with the combustion gas is attached to the inner surface of the chimney together with the cooling water, the inner surface of the chimney is made to flow, and is discharged to the discharge port through the opening. Can be done. This makes it possible to recover the fine particles in the exhaust gas using the cooling water and prevent them from being released into the atmosphere.

In the present invention, the air in the incinerator accommodating space is flowed through the air flow passage, and is guided from the upper part of the incinerator accommodating space to the internal space of the combustion wall portion. On the other hand, the amount of air required for combustion differs between the start of operation and the steady operation, and also differs depending on the type of incinerator. In addition, the amount of smoke generated in the incinerator storage space also differs depending on the type of incinerator and the combustion temperature. Therefore, it is preferable to provide a flow amount adjusting means for adjusting the flow amount of air at a predetermined position of the air flow passage. The flow amount adjusting means blocks or limits the flow of air from the air supply means to the incinerated material accommodating space, while the internal space of the combustion wall portion directly from the air supply means via the air flow passage. It is possible to make air flow.

The configuration of the flow amount adjusting means is not particularly limited. For example, a butterfly valve, a movable baffle plate, or the like can be provided at the suction port of the incinerator storage space to adjust the amount of flow. Further, an electric fan capable of adjusting the flow amount can be provided in the air flow passage.

Further, at the start of operation or the like, a flame from a burner or the like is injected toward the internal space of the incineration wall portion, but when the opening of the connection portion between the air flow passage and the incineration wall portion is large, the above The pressure near the opening does not become negative, and the air flowing through the air flow passage may leak from the opening where the burner is installed. In particular, at the start of operation, the air flowing through the air flow passage may contain smoke and foul odors accumulated above the incinerator storage space, which is inconvenient.

In order to avoid the above inconvenience, the flow amount adjusting means for regulating the flow of air flowing into the internal space of the combustion wall portion can be provided at the lower end portion of the air flow passage.

For example, as the flow amount adjusting means, an air flow regulation that regulates the flow of air into the internal space of the combustion wall portion by having an edge portion facing the lower edge portion of the combustion wall portion with a predetermined gap. A wall part can be provided.

By providing the air flow regulation wall portion, the flow area of the portion from the outlet of the air flow passage to the internal space of the combustion wall portion can be narrowed, the amount of air flow can be limited, and the inside of the combustion wall portion can be limited. The negative pressure in the space acts directly on the outlet of the air flow passage. Therefore, the air flowing out from the outlet of the air flow passage can be smoothly flowed into the internal space of the combustion wall portion. As a result, it is possible to prevent the air flowing from the air flow passage from leaking from the combustion air supply port or the like to the burner, and to avoid the inconvenience. The air flow regulation wall portion can be provided so as to surround the burner except for the air supply portion to the burner.

In the incinerator method according to the present invention, the incinerator is incinerated while flowing air from above the incinerator storage space into the internal space of the combustion wall portion. By adopting this method, the inside of the incinerator storage space is maintained at a negative pressure as compared with the atmosphere, and it is possible to prevent smoke and foul odors from leaking out. Moreover, since the combustion air supplied to the combustion wall portion is heated by the heat of the outer wall portion, the incineration efficiency in the vicinity of the combustion wall portion can be improved.

Further, according to the structure adopting the heat insulating wall, the temperature of the heat insulating wall does not become high and the safety is improved.

Further, the air supply means can be configured to include an air supply fan, but at least at the start of incineration, the air in the incinerator accommodating space is brought into the internal space of the combustion wall portion by using the air supply fan. On the other hand, it is possible to incinerate the incinerator without operating the air supply fan at the time of steady incineration.

By raising the combustion temperature in the furnace, the incinerator is completely burned to prevent the generation of dioxins, while by reducing the exhaust temperature from the chimney, the synthesis of dioxin de novo can be suppressed, and further, from the incinerator storage space. It is possible to prevent smoke and foul odors from leaking out.

It is a vertical sectional view which shows the outline of the incinerator which concerns on embodiment. It is an enlarged cross-sectional view which shows the structure and operation of a slot. It is an enlarged cross-sectional view which shows the structure and operation of a slot. It is an enlarged cross-sectional view which shows the superstructure of an incinerator. It is an enlarged cross-sectional view which shows the lower structure of an incinerator. It is sectional drawing which shows the structure of the water injection port provided in the upper part of a chimney. FIG. 6 is a cross-sectional view taken along the line VII-VII in FIG. It is a vertical sectional view which shows the outline of the incinerator which concerns on other embodiment. It is sectional drawing which shows the structure of the lower end part of the air flow passage. It is an enlarged cross-sectional view which shows the other embodiment of a slot. It is the figure which looked at the slot from the front.

Hereinafter, embodiments of the present invention will be described in detail. The form of each part is not limited to this embodiment, and various forms having the same function can be adopted.

As shown in FIG. 1, the incinerator 1 is formed to have a hollow outer wall 3 having an incinerated material accommodating space 2 inside and a central portion of the incinerated material accommodating space 2 so as to rise from the bottom of the outer wall 3. It is configured to include a perforated tubular combustion wall portion 4 and a chimney 5 that communicates with the internal space 4c of the combustion wall portion 4 and extends upward.

The outer wall 3 is formed in a hollow shape in which a tubular wall 3a having a square cross section in the vertical direction and a substantially quadrangular pyramid-shaped upper wall 3b and a lower wall 3c are connected above and below the tubular wall 3a. The upper wall 3b is provided with an input port 6 for inputting incinerated material. The lower wall 3c of the outer wall 3 is formed in a tapered shape that inclines toward the combustion wall portion 4, and as the incinerator in the vicinity of the combustion wall portion 4 burns out, the surrounding incinerator burns. It is configured so that it can be moved to the vicinity of the wall in sequence.

The outer wall 3 is provided with an air supply means 7 for sending air into the incinerator storage space 2. In the present embodiment, the air supply means 7 is connected to the air supply fan 7a provided on the outside of the outer wall and the air supply fan 7a, and supplies the air to the upper part of the incinerated material accommodating space 2. The air is supplied from the upper outlet 7b and the tip of a pipe that is arranged along the inner surface of the outer wall 3 from the vicinity of the upper outlet and reaches the inner surface of the lower wall 3c to the lower part of the incinerated material storage space 2. It is configured to include a lower outlet 7c.

By sending air into the incinerator storage space 2, combustion air is supplied to the vicinity of the combustion wall portion 4 through the gaps between the incinerators, so that combustion in the vicinity of the combustion wall portion can be promoted. When the density of the incinerator thrown into the incinerator storage space 2 is high, even if air is supplied from the upper outlet 7b, sufficient air may not be supplied to the vicinity of the combustion wall portion 4. By providing the lower outlet 7c, air can be supplied toward the combustion wall portion 4 from the inside or below of the incinerators to be laminated, and the combustion efficiency in the vicinity of the combustion wall portion can be improved. In particular, it can be expected to have the effect of promoting combustion at the time of starting and shortening the time to reach a steady state.

On the other hand, if only air is sent into the incinerator storage space 2, the air pressure in the incinerator storage space 2 increases, and the air with a foul odor may leak from the inlet 6 or the like. In order to avoid the inconvenience, an air flow passage 9 for flowing air from above the incinerator storage space 2 is provided in the internal space 4c of the combustion wall portion 4. In the present embodiment, an air flow passage communicating from the periphery of the chimney 5 at the uppermost part of the incinerator storage space 2 to the lower opening 8 of the internal space 4c of the combustion wall portion 4 via the outside of the outer wall 3. 9 is provided.

The air flow passage 9 according to the present embodiment is provided with a heat insulating wall 10 provided with a predetermined gap so as to surround the outer wall 3, and the gap is the incinerator storage space 2 and the combustion wall portion 4. The air flow passage 9 is formed by communicating with the internal space 4c of the above.

Since the air flow passage 9 for sucking air from the upper part of the incinerated material accommodating space 2 is provided, even if air is sent from the air supply means 7, it is sucked into the air flow passage 9 together with smoke and gas. There is no risk of leaking from the mouth 6 or the like. Moreover, since the air flow passage 9 communicates with the internal space 4c of the combustion wall portion 4, the malodor and gas generated in the incinerator storage space 2 are decomposed by heat in the internal space 4c of the combustion wall portion 4. It is discharged as harmless exhaust gas.

Further, as shown in FIG. 1, the heat insulating wall 10 does not expose the outer surface of the outer wall 3 connected to the combustion wall portion 4 to the outside. Therefore, the heat insulating wall 10 does not become hot, and there is no risk of burns even if the heat insulating wall 10 is erroneously touched. Further, since the air in the incinerator accommodating space 2 is made to flow along the outer surface of the outer wall 3, the temperature of the air is raised and this air is used for combustion, so that the combustion in the combustion wall portion 4 is performed. It can also be promoted.

After the incinerator state is stable (steady state), the temperature of the internal space 4c of the combustion wall portion 4 rises and the flow rate of the exhaust gas also rises. Therefore, the internal space 4c of the combustion wall portion 4 becomes a negative pressure, and the air in the incinerator accommodating space 2 can be sucked without using a fan or the like. Therefore, the air supply fan can be stopped after the steady state is reached. Further, various means for adjusting the amount of air supplied to the internal space of the combustion wall portion 4 according to the incinerated material and the combustion state, for example, an electric fan output adjusting device and an outlet capable of adjusting the output of the electric fan. A flow rate adjusting means can be provided. Further, a flow rate adjusting valve 77 capable of adjusting the amount of air flowing in the air flow passage can be provided. Further, at the start of operation, a large amount of smoke may be generated from the vicinity of the combustion wall portion. In such a case, if air is supplied into the incinerator storage space, smoke may leak from the gap of the outer wall 3 or the gap of the heat insulating wall 10. In order to avoid the inconvenience, the flow path can be switched so that air can be sent from the air supply fan 7a to the inside of the combustion wall portion 4 through the air flow passage 9 without passing through the incinerator accommodating space 2. A valve 88 can be provided.

As shown in FIG. 5, the combustion wall portion 4 is a cylindrical lower combustion wall portion 4a provided with a lower opening 8 communicating with the air flow passage 9 below, and upward from the lower combustion wall portion 4a. The upper combustion wall portion 4b having a conical side surface shape is provided, and the chimney 5 extends from the upper portion of the upper combustion wall portion 4b. A large number of holes 11a and 11b are formed in the lower combustion wall portion 4a and the upper combustion wall portion 4b. The holes 11a and 11b are set to a size that prevents the incinerated material from entering the internal space 4c of the combustion wall portion 4.

A conical side surface-shaped skirt portion 12 is formed around the side of the upper combustion wall portion 4b so as to have a predetermined gap 12a and the lower portion opens into the incinerator storage space 2. No holes are formed in the skirt portion 12. Since the skirt portion 12 covers the entire side surface of the upper combustion wall portion 4b, the incinerator charged from the charging port 6 does not come into contact with the periphery of the upper combustion wall portion 4b. Further, since the skirt portion 12 projects and covers the upper side surface of the lower combustion wall portion 4a like an umbrella, the incinerator around the lower combustion wall portion 4a is covered with the incinerator laminated upward. No pressure is applied. Therefore, it is possible to alleviate the concentration of incinerators around the combustion wall portion 4.

By providing the skirt portion 12, it is possible to secure the air permeability around the combustion wall portion 4, and the air from the air supply means 7 can be easily flowed to the vicinity of the combustion wall portion 4. Is possible. Further, even when a large amount of incinerator is charged at one time, the density of the incinerator in the vicinity of the combustion wall portion 4 is adjusted, and the incinerator can be smoothly moved to the vicinity of the combustion wall portion and incinerated.

As shown in FIGS. 2 and 3, the input port 6 is above the tubular incinerator input space 6a provided through the outer wall 3 and the heat insulating wall 10 and the incinerator input space 6a. An outer lid portion 6b provided to cover the outside of the incinerator charging space 6a, and an inner lid portion 6c provided below the incinerator charging space 6a to close the inside of the incinerator charging space 6a. It is configured to include a handle 6d for opening and closing provided on the outer surface (upper surface) of the outer lid portion 6b.

As shown in FIG. 2, when the outer lid portion 6b is in the open state toward the outer space, the inner lid portion 6c holds the incinerator storage space side of the incinerator charging space 6a in the closed state. On the other hand, as shown in FIG. 3, when the outer lid portion 6b is in the closed state, the inner lid portion 6c is held in the open state toward the incinerator charging space 6a. The outer lid portion 6b and the inner lid portion 6c are connected by a link mechanism 13. The link mechanism 13 is configured to connect the outer lid portion 6b and the inner lid portion 6c via a link rod 14 so as to be interlocked as described above.

By adopting the above configuration, when the incinerator is charged into the incinerator charging space 6a with the outer lid 6b open, the inner lid 6c is on the incinerator storage space side of the incinerator charging space 6a. Since the closure is closed, no foul odor or smoke leaks from the inlet 6. On the other hand, by closing the outer lid portion 6b, the inner lid portion 6c is opened and the incinerator is put into the incinerator storage space 2. Therefore, when the incinerator is additionally charged, foul odors and smoke do not leak from the input port 6. It is preferable that the link rod 14 is detachably provided for internal maintenance and the like.

As shown in FIGS. 1 and 4, cylindrical cooling water flow passages 16b and 16c are provided so as to surround the outer periphery of the chimney 5 in the incinerator storage space 2. The cooling water flow path is connected to a pipe extending from the pump 16a, and the first flow path 16b and the chimney 5 are connected so that the cooling water flows from above the incinerator storage space 2 toward the lower end of the chimney 5. A second flow path 16c that communicates with the first flow path and allows cooling water to flow upward is provided at the lower end portion of the above. A cooling water discharge port 16d is provided at the upper end of the second flow path 16c, and is connected to the wastewater treatment means 17 via a drainage pipe 16e.

By flowing the cooling water around the chimney 5 penetrating the incinerator storage space 2, the temperature of the exhaust gas flowing in the chimney can be lowered. Further, since it is possible to alleviate the heat from the exhaust gas flowing in the chimney 5 acting on the incinerator housed in the incinerator storage space 2, it is possible to prevent the generation of a foul odor. Moreover, in the present embodiment, since the outer surface of the entire circumference of the chimney 5 leading to the combustion wall portion 4 can be cooled, damage to the chimney due to the heat of the exhaust gas rising from the combustion wall portion 4 can be prevented.

The second flow path 16c extends upward from the cooling water discharge port 16d, and an annular opening 20 that opens into the chimney 5 is provided at the upper end thereof. Further, above the annular opening 20, an injection port 15b for injecting cooling water into the chimney 5 is provided. The injection port 15b is configured to be able to inject water supplied from the pump 15a into the chimney, and the exhaust gas flowing upward in the chimney 5 is cooled by the water. As a result, the temperature of the exhaust gas discharged from the chimney can be significantly reduced. Further, the dust contained in the exhaust gas is adsorbed by the jet water, adhered to the inner surface of the chimney 5, guided to the annular opening 20 through the inner surface of the chimney, and discharged from the cooling water discharge port 16d. Will be done. The discharged cooling water is purified by the wastewater treatment means 17. With this configuration, dust in the exhaust gas can also be removed.

In a conventional incinerator, the air required for incineration is directly introduced from the outside into the central portion of the incinerator. Therefore, the temperature of the part where the incinerator is burned tends to decrease. In the incinerator 1 according to the present embodiment, in the steady state, air is supplied into the incinerator accommodating space 2 and the internal space of the combustion wall 4 is supplied from above the incinerator accommodating space 2. The incinerator is incinerated while flowing air. That is, the air required for incinerator is once introduced into the incinerator storage space 2, then flowed along the outer wall 3, and then guided to the inner space of the combustion wall portion 4. Therefore, the temperature of the air required for incineration is increased, and the incineration temperature in the internal space of the combustion wall portion 4 is also increased. Therefore, the incinerator efficiency is increased, and the generation of incomplete combustion gas, dust, dioxins and the like can be reduced.

Moreover, in the present embodiment, the heat insulating wall 10 is provided with a predetermined gap so as to surround the outer wall 3, and the gap constitutes the air flow passage 9. Therefore, the heat insulating wall 9 is formed. The wall 10 is arranged with respect to the outer wall 3 via an air layer. Therefore, the temperature of the outer surface of the heat insulating wall does not rise, and there is no risk of burns or the like even if the operator comes into contact with the heat insulating wall, so that the safety is greatly improved.

8 to 11 show other embodiments of the present invention.

This embodiment is characterized by the structure of the air flow passage 9 below the incinerator wall portion 4 and the structure of the incinerator inlet 201. The common members are designated by the same reference numerals.

The lower edge portion of the lower incinerator wall portion 4a is joined to the lower edge portion of the lower wall 3c constituting the incinerator storage space 2.

In the present embodiment, a cross section is cross-sectioned from the bottom portion 223 so that the upper edge portion faces the joint portion 222 between the lower incinerator wall portion 4a and the lower wall portion 3c with a predetermined gap 221 at the lower portion of the air flow passage 9. An air flow regulation wall 220 that rises in a trapezoidal shape is provided.

By providing the air flow regulation wall portion 220, the amount of air flowing from the air flow passage 9 through the gap 221 into the internal space 4c of the combustion wall portion 4 is reduced. As a result, the air from the air flow passage 9 does not enter the space where the burner 18 is installed, and foul odors and smoke leak from the opening that supplies the combustion air to the burner 18 at the start of operation or the like. Can be prevented.

As shown in FIGS. 8 and 10, the input port 201 is provided so as to penetrate the outer wall 3 and the heat insulating wall 10. In the present embodiment, a lid 206 is provided on the outside of the heat insulating wall 10 so as to openably cover the input port 201. The upper portion of the lid portion 206 is rotatably connected to the upper edge portion of the input port 201, and the lid portion 206 is opened by pulling the handle 208.

On the other hand, an air blowing means 212 for blowing out a layered air flow 209 covering the inside of the inlet 201 is provided on the upper part inside the outer wall 3 of the inlet 201. The air blowing means 212 is configured by providing air blowing holes at predetermined intervals in a pipe longer than the width direction dimension of the inlet 201. Air is supplied to the air blowing means 212 from the air supply means 7 via the connecting pipe 210, and a layered air flow is blown so as to cover the inlet.

As shown in FIG. 8, the air flow 209 flows upward along the outer surface of the chimney 5 while flowing upward toward the center of the incinerator housed in the incinerator storage space 2, and accommodates the incinerator. It is made to flow into the air flow passage 9 from the air suction port 7d provided above the space 2.

By adopting the above configuration, when the lid 206 is opened to throw in the incinerator, even if the incinerator storage space 2 is communicated with the outside, bad odors and smoke are emitted from the incinerator storage space 2. It is possible to prevent leakage.

INDUSTRIAL APPLICABILITY According to the present invention, there is provided an incinerator capable of efficiently burning an incinerated product at a high temperature, lowering the exhaust temperature from a chimney, and further preventing combustion gas from leaking from an incinerated product accommodating space. can do.

1 Incinerator 3 Outer wall 2 Incinerated material storage space 4 Combustion wall 5 Chimney 7 Air supply means 9 Air flow passage

Claims (18)

In the central part of the incinerator storage space surrounded by the outer wall, a tubular combustion wall part that rises from the bottom and communicates with the inside and outside is formed and a tubular combustion wall part that can hold the incinerator is provided. An incinerator that burns incinerators
A chimney that communicates with the internal space of the combustion wall and extends upward,
An air supply means that can supply air to the incinerator storage space,
Air that communicates from the upper part of the incinerator storage space to the lower part of the internal space of the combustion wall portion via the outside of the outer wall, and flows air from above the incinerator storage space to the internal space of the combustion wall portion. An incinerator equipped with a flow passage. A heat insulating wall provided with a predetermined gap so as to surround the outer wall is provided, and the gap is communicated with the incinerator accommodating space and the internal space of the combustion wall portion to form the air flow passage. The incinerator according to claim 1. The air supply means is configured to include an air supply fan, and the air supply means is provided with an air supply fan.
The upper outlet that supplies the air to the upper part of the incinerator storage space,
The incinerator according to claim 1 or 2, further comprising a lower outlet for supplying the air to the lower part of the incinerator storage space. The combustion wall portion includes a cylindrical lower combustion wall portion and a conical side surface-shaped upper combustion wall portion extending upward from the lower combustion wall portion, and the chimney is formed from above the upper combustion wall portion. It has been postponed and
Claims 1 to 3 are formed by opening a predetermined gap around the side of the upper combustion wall portion and provided with a conical side surface-shaped skirt portion whose lower portion opens into the incinerator storage space. The incinerator according to any one of the above. The incinerator according to any one of claims 1 to 4, wherein an inlet for incinerator is provided in the upper part of the outer wall. The input port is provided so as to penetrate the outer wall and the heat insulating wall, and is formed in a tubular shape having an incinerator input space inside.
An inner lid that is provided below the incinerator input space and can close the inside of the incinerator input space, and an outer lid that is provided above the incinerator input space and covers the outside of the incinerator input space. With a part,
When the outer lid portion is in the closed state, the inner lid portion is held in an open state toward the incinerator storage space, and the outer lid portion is in an open state toward the outer space. The incinerator according to claim 5, wherein the inner lid portion is configured to be held in a closed state. The incinerator according to claim 6, wherein the outer lid portion and the inner lid portion are connected by a link mechanism. The input port is provided so as to penetrate the outer wall and the heat insulating wall.
On the outside of the outer wall, a lid portion is provided to cover the inlet so as to be openable and closable.
Claimed from claim 3, wherein air is supplied from the air supply means to the upper edge of the inlet on the inside of the inner wall, and an air blowing means for blowing out a layered air flow so as to cover the inlet is provided. Item 5. The incinerator according to any one of Item 5. The incinerator according to any one of claims 1 to 8, wherein a flow amount adjusting means for adjusting the flow amount of air is provided at a predetermined position of the air flow passage. Claims 1 to 9 include a flow path switching valve capable of sending air from the air supply means to the inside of the combustion wall portion through the air flow passage without passing through the incinerator accommodating space. The incinerator according to any one of the above. The incinerator according to claim 9, further comprising the flow amount adjusting means for regulating the flow of air flowing into the internal space of the combustion wall portion at the lower end of the air flow path. The flow amount adjusting means has an edge portion facing the lower edge portion of the combustion wall portion with a predetermined gap, and an air flow regulation wall portion that regulates the flow of air into the internal space of the combustion wall portion. The incinerator according to claim 11. A cylindrical cooling water flow path is provided so as to surround at least the outer circumference of the chimney in the incinerator storage space.
The cooling water flow path communicates with a first flow path in which cooling water flows from above the incinerator storage space toward the lower end of the chimney, and the first flow path, and is connected to the lower end of the chimney. It is configured with a second flow path through which the cooling water flows upward from the section.
The incinerator according to any one of claims 1 to 12, wherein a cooling water discharge port is provided at the upper end of the second flow path. In the central part of the incinerator storage space surrounded by the outer wall, a tubular combustion wall part that rises from the bottom and communicates with the inside and outside is formed and a tubular combustion wall part that can hold the incinerator is provided. It is an incinerator method in which incinerators are burned.
The above incinerator
A chimney that communicates with the internal space of the combustion wall and extends upward,
An air supply means that can supply air to the incinerator storage space,
It is configured to include an air flow passage that communicates from the upper part of the incinerator storage space to the lower part of the internal space of the combustion wall portion via the outside of the outer wall.
A method of incinerator in an incinerator, in which air is supplied into the incinerator storage space and the incinerator is incinerated while flowing air from above the incinerator storage space into the internal space of the combustion wall portion. The incinerator method according to claim 14, wherein the incinerator is incinerated while supplying air to the upper part and the lower part of the incinerator storage space. A heat insulating wall provided with a predetermined gap so as to surround the outer wall is provided, and the gap constitutes the air flow passage, and the air in the incinerator accommodating space is burned along the outer surface of the outer wall. The incinerator method according to claim 14 or 15, wherein the incinerated product is incinerated while flowing into the internal space of the wall portion. At least, at the start of operation of the incinerator, the amount of air supplied from the air supply means to the incinerated material accommodating space and / or the amount of air flowing from the incinerator accommodating space to the internal space of the combustion wall portion is limited. The method for incinerating in an incinerator according to any one of claims 14 to 16. At least at the start of operation of the incinerator, the flow of air from the air supply means to the incinerator storage space is blocked or restricted, and at the same time.
The incinerator method according to any one of claims 14 to 17, wherein air is flowed from the air supply means to the internal space of the combustion wall portion through the air flow passage.

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