JP2024003660A - Incineration device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safer incineration device made less likely to leak combustible gas.

SOLUTION: An incineration device includes: a fire grate constituting a part of a bottom of a primary combustion part, having a plurality of holes, and discharging ash produced by combustion of an object from the plurality of holes; a guide arranged along a side of the primary combustion part and moving the object toward the fire grate; and an input port arranged above the guide and configured to input the object into the primary combustion part. A connection pipe for connecting the primary combustion part with a secondary combustion part is connected to a portion between an upper end of the fire grate and an upper end of the guide in the side of the primary combustion part.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present disclosure relates to an incinerator configured to incinerate an object.

Patent Document 1 below describes an incinerator that has a configuration in which combustible gas contained in exhaust gas in a primary combustion section is burned in a secondary combustion section to suppress the combustible gas from being released into the atmosphere. is proposed. In the above-mentioned incinerator, objects are input through an input port located at the upper part of the temporary incineration section, and the configuration of the input port is devised to prevent flammable gas from leaking during input.

Japanese Patent Application Publication No. 2021-060160

Incidentally, in the above-mentioned incinerator, it is required to further prevent flammable gas from leaking. One aspect of the present disclosure is to provide a safer incinerator in which flammable gas is less likely to leak.

One aspect of the present disclosure is an incinerator, which includes a primary combustion section for burning a target object, and an incinerator in which exhaust gas and air generated in the primary combustion section are introduced, and for burning combustible gas contained in the exhaust gas. It includes a secondary combustion section, and a connecting pipe that connects the primary combustion section and the secondary combustion section and is configured as a flow path through which exhaust gas flows.

The primary combustion section constitutes a part of the bottom of the primary combustion section, has a plurality of holes, and includes a grate section for discharging ash generated from the combustion of the object from the plurality of holes; A guide section is arranged along the side of the primary combustion section to move the object toward the grate section, and a guide section is arranged above the guide section to introduce the object into the primary combustion section. The connecting pipe is configured to be connected to a portion between the upper end of the grate section and the upper end of the guide section on the side of the primary combustion section.

It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device. It is an explanatory view of an incineration device.

For the configuration of the present disclosure, the entire contents of Japanese Patent Application No. 2019-185231 and Japanese Patent Application No. 2021-011770 can be incorporated into the present application by reference.
Embodiments of the present disclosure will be described below with reference to the drawings.

[1. Embodiment]
[1-1. overview]
An incinerator 1 according to one embodiment of the present disclosure shown in FIG. 1 and below is an incinerator that has a function of burning a target object in an incinerator to which air is supplied. The incinerator 1 (especially the primary combustion section 30) functions as a low thermal decomposition incinerator. Note that "combustion" in this embodiment does not necessarily mean combustion that produces a flame, but includes a phenomenon in which an object is thermally decomposed and gasified without producing a flame.

In the incinerator 1, when an object is inputted from the transport device 10 (input port), the object moves to the primary combustion section 30 through the inside of the transport device 10. In the primary combustion section 30, the target object becomes sparks through thermal decomposition, and eventually turns into incinerated ash. The primary combustion section 30 includes a furnace section 31 . Inside the furnace section 31, air is supplied from the grate section to ensure good combustion. Thereafter, this incinerated ash moves to the discharge section 80 and is discharged to the outside of the incinerator 1.

In the primary combustion section 30, flammable gas is generated from the object, and at this time, a flame-free state is maintained. In the furnace section 31, the thermal decomposition of the object is promoted by the sparks, and the object is decomposed into incinerated ash and combustible gas. The combustible gas that has been gasified from the object is burned in the secondary combustion section 50. The secondary exhaust gas, which is the gas after combustion in the secondary combustion section 50, is cooled in the cooling section 60, and its temperature is lowered to near the atmospheric temperature.

Note that the dew condensation water generated in the cooling section 60 is collected in the purification section 70. In the purification section 70, the dew condensation water is neutralized and purified.
[1-2. overall structure]
As shown in FIG. 1 and below, the incinerator 1 includes a transport device 10, a blower 23 (air blowing section), a primary combustion section 30, a secondary combustion section 50, a cooling section 60, a purification section 70, and a discharge section. 80. Among these, the configurations other than the primary combustion section 30 and the secondary combustion section 50 are not essential configurations.

[1-3. Feature composition]
Hereinafter, the flow of gas, that is, air and exhaust gas, flowing inside the incinerator 1 will be explained, and the characteristic configuration of the present disclosure will be explained. The gas within the incinerator 1 is moved by a blower 23 located at the top of the incinerator 1 .

The blower 23 sucks out the gas in the furnace section 31 of the primary combustion section 30, thereby creating a negative pressure inside the furnace section 31. The blower 23 supplies a smaller amount of gas than the gas sucked out from the furnace section 31 to the transport device 10 and the inspection port. The inspection port is an opening that can be opened and closed when inspecting the inside of the furnace section 31. The inspection port is arranged on the side surface of the furnace section 31 at a position facing the transport device 10.

With such a configuration, the atmospheric pressure at the transport device 10 and the inspection port is slightly higher than the inside of the furnace section 31. Therefore, in the incineration device 1, when the transport device 10 and the inspection port are opened when an object is loaded or inspected after operation, exhaust gas in the furnace section 31 can be suppressed from being released to the outside. Further, it is possible to suppress the backfire phenomenon in which flames are ejected from the transport device 10 or the inspection port.

Further, as shown in FIGS. 7 to 10, the bottom of the furnace section 31 of the primary combustion section 30 is provided with a grate section. The grate section functions as a grate in the furnace section 31.
An air inlet communicating with the atmosphere is arranged below the grate, and when the inside of the furnace 31 is depressurized, air is introduced from the air inlet and through the plurality of holes provided in the grate. Air is supplied to the inside of the furnace section 31 .

The grate portion is configured such that the cross-sectional area on the virtual horizontal plane gradually decreases as it goes downward. In other words, the grate has a tapered shape that becomes narrower at the bottom, or a funnel shape. Note that the virtual horizontal plane is a virtual plane parallel to the horizontal plane.

The grate has a metal mesh structure, and gaps in the mesh form a large number of holes. The grate portion allows only ash that is smaller than the size of the mesh structure to pass through. The grate portion is configured to rotate around a vertical axis. The configuration in which the grate portion rotates will be described later.

In the grate section having such a configuration, the area of the mesh structure portion can be increased relative to the size of the bottom portion (cross-sectional area on the horizontal plane) of the furnace section 31. In other words, air can be favorably supplied from the mesh structure toward the object.

In this configuration, ash resulting from carbonization of the object accumulates within the grate. The temperature of this ash rises to about 800 degrees Celsius, and depending on the object, the ash turns white and becomes ceramic. In addition, in the grate section having this shape, the internal ash reaches a high temperature in the peripheral area of the mesh structure, and in this case, the internal ash forms a fireball with a red surrounding area. This fireball heats the object immediately after being thrown into it, promoting carbonization. In other words, the incinerator 1 realizes a configuration in which objects can be continuously input.

Here, as shown in FIGS. 10 and 11, the primary combustion section 30 includes a guide section in the furnace section 31. The guide part is a metal plate arranged in an annular shape along the inner circumferential surface of the side surface of the furnace part 31, and the outer circumferential part is located at the uppermost part, and the guide part is arranged downward as it goes to the inner circumferential side. A slope is provided. The guide part has a function of moving the object toward the grate part by gravity.

Further, below the guide part, there is provided an annular partition part arranged substantially parallel to the guide part. Like the guide part, the partition part is a metal plate arranged in an annular shape along the periphery of the furnace part 31, and the inner peripheral end of the partition part is connected to the bottom of the furnace part 31 without a gap. be done. Further, the outer peripheral end of the partition wall portion is connected to the inner peripheral surface of the side surface of the furnace portion 31 without any gap. Since the partition wall part is arranged to be inclined like the guide part, the partition wall part separates the space inside the primary combustion part 30 from the space on the furnace part 31 side and the space below it (hereinafter referred to as heating space). It functions as a partition wall that separates the

Here, on the path from the furnace section 31 of the primary combustion section 30 to the blower 23, a connecting pipe, the secondary combustion section 50, the cooling section 60, etc. are arranged. In other words, the blower 23 sucks out the gas in the furnace section 31 through these.

As shown in FIGS. 1 and 8, the connecting pipe connects the primary combustion section 30 and the secondary combustion section 50 and is configured as a flow path through which exhaust gas flows. The connecting pipe is connected between the guide section and the partition wall section in the furnace section 31 . In other words, the connecting pipe is connected to a portion between the upper end of the grate section and the upper end of the guide section.

With this configuration, the gas inside the furnace section 31 is sucked out at a relatively lower part of the furnace section 31 at a portion where carbonization of the object is promoted (near the grate section). In such a configuration, since the gap between the guide part and the partition wall part is formed over the entire circumference of the furnace part 31, the air flow in this gap is smooth, and the gap between the guide part and the partition wall part is formed over the entire circumference of the furnace part 31. Gas can be effectively sucked out from the area. That is, although there is only one location from which gas is sucked out from the furnace section 31, the gas can be made to flow more easily along the circumferential direction. As a result, the combustion state within the furnace section 31 can be made uniform.

An exhaust gas reserve tank is disposed at an intermediate portion of the connecting pipe. The exhaust gas reserve tank has a function of condensing moisture contained in the gas and supplying only dry gas to the secondary combustion section 50. Note that moisture generated by condensation is stored in a condensation water tank shown in FIG. 3.

The gas dried in the exhaust gas reserve tank is introduced into the secondary combustion section 50 through a diversion section that diverts the flow of the gas, as shown in FIG. 12. The turning section is a section for introducing gas from the primary combustion section 30 so as to be perpendicular to the straight pipe connected to the secondary combustion section 50 . The straight pipe is provided with an extension part configured to extend the straight pipe as it is, on the opposite side of the secondary combustion part 50 when viewed from the turning part. The extension part is a straight pipe similar to a straight pipe, and extends to the vicinity of the side surface of the incinerator 1 . The end of the extension section opposite to the secondary combustion section 50 is closed. The extension part functions as a balance tube that reduces gas pulsation due to combustion within the secondary combustion part 50.

The secondary combustion section 50 is arranged below the primary combustion section 30. Moreover, as shown in FIG. 9, the secondary combustion part 50 is arranged so as to surround the lower part (here, the grate part) of the primary combustion part 30. The secondary combustion section 50 includes a hollow cylindrical portion having a rectangular cross section in the longitudinal direction. The secondary combustion section 50 includes an ignition device and a heating wire inside a hollow cylindrical portion. The ignition device is a device for igniting gas containing flammable gas to combust it. Further, the heating wire is arranged near the gas inlet inside the secondary combustion section 50, as shown in FIGS. 9, 10, and 12, for example, and functions as a heat source that generates heat using electric power. Note that the heating wire may also serve as an ignition device.

The heating wire operates when the temperature of the furnace section 31 is low, such as immediately after the incinerator 1 is started. In a configuration that uses a heating wire, there is no need for air blowing by the blower 23, which is required in a configuration that uses a gas burner or the like, and it is possible to locally heat the area around the area where the heating wire is arranged. The blower 23 is configured to start operating when a predetermined temperature is reached after ignition, and the heating wire is configured to stop operating. For example, the heating wire is stopped when the temperature of the secondary combustion section 50 is about 830 degrees Celsius. Note that a configuration in which heating is performed using electric power other than a heating wire may be adopted. For example, a heating method using electromagnetic induction can be adopted.

As shown in FIG. 9, the gas that has finished burning in the secondary combustion section 50 travels around the grate section once and then moves upward through the connection hole provided at the top of the secondary combustion section 50. do.
The connection hole is a hole for communicating the space inside the secondary combustion section 50 and the heating space in the primary combustion section 30. In the heating space, an exhaust pipe that connects the heating space and the cooling section 60 is connected right next to the connection hole. However, in the heating space, a partition plate is arranged between the connection hole and the exhaust pipe, and the gas introduced from the connection hole flows almost below the furnace part 31 along the partition wall in the heating space. It is set so that it cannot reach the exhaust pipe unless it completes one rotation. With this configuration, the furnace section 31 is well heated by the gas introduced from the connection hole.

By the way, as shown in FIGS. 6 and 7, the lower part of the grate part is provided with an ash receiving part configured to receive the ash falling from the grate part on its upper surface, and a discharge part 80. The discharge section 80 is configured to discharge the ash accumulated on the upper surface of the ash receiving section from the side of the ash receiving section.

Specifically, the ash receiving portion has a circular upper surface, and the center thereof is configured to coincide with the central axis of the grate portion. An arm is rotatably fixed to the center of the ash receiving section. The arm has the function of pushing out the ash accumulated on the upper surface to the outside of the side as it rotates.

The discharge section 80 further includes a drive device such as a motor (ash removal motor) disposed further below the ash receiving section, and a drive shaft rotationally driven by the drive device. The arm is attached to a drive shaft and rotationally driven by a drive device. A grate section is also attached to the drive shaft. That is, the drive shaft for rotationally driving the arm and the drive shaft for the grate portion are integrally configured, and the drive device rotationally drives the grate portion together with the arm.

Note that in the furnace section 31, most of the weight of the object is received by the guide section. For this reason, the grate is designed so that only part of the weight of the object is applied to it. Therefore, the grate can be rotated well regardless of the amount of objects.

The ash receiving section includes an outer circumferential wall that stands upright along the outer circumferential portion, and an opening is formed in a part of the outer circumferential wall. The ash pushed out laterally by the arm is discharged from this opening to the outside of the ash receiving section.

Outside the opening, an ash ejector is provided as part of the ejector 80. The ash ejector has a spiral propeller or a large number of propellers inside, and the ash introduced from the opening is sent to the ash outlet by the operation of the propeller driven by a motor.
[1-4. effect]
According to the embodiment described in detail above, the following effects are achieved.

One aspect of the present disclosure is an incinerator, which includes a primary combustion section for burning a target object, and an incinerator in which exhaust gas and air generated in the primary combustion section are introduced, and for burning combustible gas contained in the exhaust gas. It includes a secondary combustion section, and a connecting pipe that connects the primary combustion section and the secondary combustion section and is configured as a flow path through which exhaust gas flows.

The primary combustion section constitutes a part of the bottom of the primary combustion section, has a plurality of holes, and includes a grate section for discharging ash generated from the combustion of the object from the plurality of holes; A guide section is arranged along the side of the primary combustion section to move the object toward the grate section, and a guide section is arranged above the guide section to introduce the object into the primary combustion section. The connecting pipe is configured to be connected to a portion between the upper end of the grate section and the upper end of the guide section on the side of the primary combustion section.

According to such a configuration, the connecting pipe is connected to a part (connection part) between the upper end of the grate part and the upper end of the guide part, and exhaust gas is discharged from this connection part, so that combustible substances contained in the exhaust gas are discharged. It is possible to make it difficult for gas to rise to the upper input port in the primary combustion section. Further, since a large amount of flammable gas is generated near the connection site, the structure can be configured to facilitate exhausting this flammable gas from the connection site before it diffuses. Therefore, it is possible to make it difficult for flammable gas to leak from the inlet, so that a safer incinerator can be provided.

In one aspect of the present disclosure, the secondary combustion section is arranged below the primary combustion section. According to such a configuration, the primary combustion section can be heated using the heat generated from the secondary combustion section.
In one aspect of the present disclosure, the secondary combustion section is arranged to surround a lower portion of the primary combustion section. According to such a configuration, the secondary combustion section can heat the entire lower part of the primary combustion section.

In one aspect of the present disclosure, the secondary combustion section includes an internal heat source that generates heat using electric power. According to such a configuration, the primary combustion section can be heated without using combustion heat.
In one aspect of the present disclosure, the grate portion is configured such that the cross-sectional area on the virtual horizontal plane gradually decreases as it goes downward. The incinerator further includes a blowing section configured to blow air from outside to inside the primary combustion section using a plurality of holes.

According to such a configuration, since the grate portion is configured in a tapered shape, the surface area of the grate portion is larger than when the grate portion is arranged along a horizontal plane, and a plurality of holes are formed on the object. It is possible to provide a good supply of air blown from the Therefore, the object can be burnt well.

In one aspect of the present disclosure, an ash receiving part configured to receive ash falling from the grate part on an upper surface is provided at a lower part of the grate part, and ash accumulated on the upper surface is collected from the side of the ash receiving part. and a discharge portion configured to discharge ash.

According to such a configuration, since ash is discharged from the side of the ash receiving section, the height of the incinerator can be lowered compared to a configuration in which ash is discharged from below the ash receiving section.
In one aspect of the present disclosure, the discharge section includes an arm that has the function of pushing out ash accumulated on the upper surface to the side, and the grate section is configured to rotate together with the arm. According to such a configuration, the grate portion can be configured to rotate together with the arm.

[3. Other embodiments]
Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments and can be implemented with various modifications.

(3a) A plurality of functions of one component in the above embodiment may be realized by a plurality of components, and a function of one component may be realized by a plurality of components. . Further, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Further, a part of the configuration of the above embodiment may be omitted. Further, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of other embodiments.

(3b) In addition to the above-mentioned incinerator 1, a system that includes the incinerator 1 as a component, a program for making a computer function as the incinerator 1, and non-transitional physical records such as semiconductor memory in which this program is recorded The present disclosure can also be implemented in various forms such as media and incineration methods.

DESCRIPTION OF SYMBOLS 10... Conveyance device, 23... Blower, 30... Primary combustion part, 50... Secondary combustion part, 60... Cooling part, 70... Purification part, 80... Discharge part.

Claims (7)

An incinerator,
a primary combustion part for burning the object;
a secondary combustion section into which exhaust gas and air generated in the primary combustion section are introduced and for burning combustible gas contained in the exhaust gas;
a connecting pipe connecting the primary combustion section and the secondary combustion section and configured as a flow path through which the exhaust gas flows;
Equipped with
The primary combustion section is
A grate part forming a part of the bottom of the primary combustion part, having a plurality of holes, and discharging ash generated as a result of combustion of the object from the plurality of holes;
a guide section disposed along a side of the primary combustion section for moving the object toward the grate section;
and an input port disposed above the guide section for inputting the object into the primary combustion section,
The incinerator is configured such that the connecting pipe is connected to a portion between an upper end of the grate portion and an upper end of the guide portion on a side portion of the primary combustion portion. The incinerator according to claim 1,
The said secondary combustion part is arrange|positioned at the lower part of the said primary combustion part. Incinerator. The incinerator according to claim 2,
The said secondary combustion part is arrange|positioned so that the periphery of the lower part of the said primary combustion part may be surrounded. Incinerator. The incinerator according to claim 2 or 3,
The said secondary combustion part is equipped with the heat source which generates heat by electric power inside. The incinerator. The incinerator according to any one of claims 1 to 3,
The grate portion is configured such that the cross-sectional area on the virtual horizontal plane gradually decreases as it goes downward;
The incinerator is
an air blowing section configured to blow air from the outside to the inside of the primary combustion section using the plurality of holes;
An incinerator further comprising: The incinerator according to any one of claims 1 to 3,
an ash receiving part configured to receive ash falling from the fire grate on an upper surface at a lower part of the fire grate;
a discharge section configured to discharge the ash accumulated on the upper surface from the side of the ash receiving section;
An incinerator further comprising: The incinerator according to claim 6,
The discharge part includes an arm having a function of pushing out ash accumulated on the upper surface to the side,
The incinerator is configured such that the grate portion rotates together with the arm.