JPH02157511A - Incinerating device - Google Patents

Abstract

PURPOSE:To reduce the concentration of discharged powder dust by a method wherein the introducing port of air for burning substances to be incinerated in a furnace is formed downwardly or horizontally at the vicinity of the lower part of the wall of an incinerating furnace and a negative pressure generating mechanism as well as rotary vanes are arranged in the part of a duct above the incinerating furnace while a connecting tube to a cyclone is connected to the upper part of the duct. CONSTITUTION:Air, sent from a fan 40, is in injected energetically from the tapered tip end of a blow-up pipe 41 and passes energetically through a penetrating hole formed on a plate member 12 whereby the part of a furnace 1, which is lower than the plate member 12, becomes the condition of a negative pressure while remained ash, blown up by the ventilating air, is sucked up into a duct 13 at the upper part of the furnace 1. The remained ash ascends while being collided against the inner wall surface of the duct 13 by the rotation by a rotary vanes 5 and is introduced into a cyclone 3 by a connecting pipe 6 together with one part of the ventilating air. The the remained ashes, transported in such a manner, are collided against the outer peripheral surface of a cylinder 31 and is dropped into a recovering unit 30 to retrieve it. According to this method, the removing work or the like of the remained ashes is not necessitated and an inexpensive incinerating device can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an incinerator, and more particularly, to an incinerator that can suppress the concentration of dust emitted after combustion of waste to a low level and is useful for preventing pollution.

<Prior art> Conventionally, incinerators for burning waste such as miscellaneous light, wood, plastics, rubber, etc. have been equipped with a
An incinerator with a structure in which a mesh member is installed that allows the remaining ash to pass through but not the combustible materials, and a space is formed at the bottom of the incinerator, and the air necessary for combustion is sent through this space while the combustible materials are combusted. It has been known.

<Problems to be Solved by the Invention> However, in the above-mentioned incinerator, the residual ash accumulated in the space at the bottom of the incinerator through the mesh member obstructs the feeding of air, so that the residual ash is removed from the space. The residual ash must be removed periodically, and the work of removing the remaining ash from inside the incinerator is troublesome, and the incineration work has to be stopped during that time.

Therefore, high-temperature compressed air is sent into the incinerator from the space inside the incinerator, the remaining ash is blown up into the incinerator together with the combustion materials, and the blown up remaining ash is collected above the incinerator. An incinerator with a structure that prevented it from accumulating in the lower part of the incinerator was also invented, but since the remaining ash was blown up into the upper part of the incinerator along with the burning materials, the remaining ash was separated and recovered from the high-temperature combustion materials. It was necessary to install a cooling device etc. on the top of the incinerator for this purpose, which made the equipment extremely complicated and also expensive.

In addition, in any of the above incinerators, when fluid wastes such as plastics and rubber are burned by heating, the mesh of the mesh member installed at the bottom of the incinerator will prevent these fluids from being burned. This caused problems such as the inability to supply the air necessary for combustion into the furnace.

This invention was invented in view of the actual situation of these conventional incinerators, and it is an incineration device that does not require work to remove residual ash, does not require any equipment such as a cooling mechanism, and is inexpensive. is intended to provide.

Means for Solving the Problems> The incinerator of the present invention for solving the above problems is equipped with an incinerator, a circulation blower for feeding air into the incinerator, and a cyclone, and a cyclone near the bottom of the incinerator wall. The air inlet from the circulation blower that burns the combustion materials in the incinerator and blows the remaining ash upwards is formed toward the lower side of the incinerator or horizontally, and in the duct part above the incinerator, A negative pressure generating mechanism is installed to suck up the blown up residual ash upwards, and a swirling blade is also installed to swirl and raise the sucked up residual ash.Furthermore, at the top of the duct, a negative pressure generating mechanism is installed to suck up the blown up residual ash. A connecting pipe is connected to a cyclone that separates the remaining ash from the blast air and collects it, and a connecting pipe that sends the air after separating the residual ash to the circulation blower is connected to the cyclone. .

According to the incinerator of the present invention having the above configuration, the inlet for the air that burns the combustion material in the furnace and blows up the remaining ash upward is provided near the lower part of the incinerator wall and is directed toward the lower side of the furnace. Because it is formed vertically or horizontally, the remaining ash after combustion can be blown upward into the furnace.

A negative pressure generation mechanism is installed in the duct above the incinerator, as well as swirling blades that swirl and lift the remaining ash, and a connecting pipe to the cyclone is connected to the top of the duct.
The blown-up residual ash further rises to the duct part above the incinerator by the negative pressure generating mechanism, and collides with the inner wall surface of the duct as it is swirled by the swirling blades. The remaining ash is then led to a cyclone through a connecting pipe installed at the top of the duct, where the remaining ash is separated from the blown air and can be recovered.

After the residual ash has been separated, the blown air is conveyed through a connecting pipe to a circulation blower, which burns the combustion materials in the incinerator.
It can be reused to blow the remaining ash upwards into the furnace.

<Examples> Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows a schematic sectional view of the incinerator of the present invention.

The incinerator consists of an incinerator (1) that burns waste made of miscellaneous materials, wood, plastics, rubber, etc., a circulation blower (2) that blows air into the incinerator (1), and a blower that blows the remaining ash after combustion. It consists of a cyclone (3) that separates and collects air.

Near the bottom of the wall of the incinerator (1), a plurality of inlets (11) for introducing air from the circulation blower (2) are formed at appropriate locations around the periphery (three in the case of the figure). Figure 2,
(See Figure 3). This air inlet (11) is for burning the combustion material in the furnace (1) and blowing up the remaining ash upward, and as shown in Figure 1, it is slanted downward in the furnace (1). Although it is preferable to form the hole through the incinerator horizontally, it is also possible to form the hole through the incinerator horizontally.Note that (12) is a small window for cleaning inside the incinerator.

A negative pressure generating mechanism (4) is provided in the duct (13) above the incinerator (1) to suck up the blown up residual ash. This negative pressure generation mechanism (4) is the incinerator (1)
A blower (40) that blows air upwards inside the furnace, an elongated cylindrical blow-up pipe (41) disposed in the central part of the furnace,
40) and the elongated cylindrical blow-up pipe (41>), and a plate material (12) disposed above the tip of the blow-off pipe (41>) in the furnace (1). .

The elongated cylindrical blow-up pipe (41) is connected to the blower (40).
) The tip thereof is formed into a tapered shape so that the air sent from the furnace (1) is blown out with force into the furnace (1). Moreover, a through hole is formed in the center of the absorbent material (12).

The air sent from the blower (40) is passed through the blow-up pipe (4
1) It ejects forcefully from the tapered part of the tip. Then, this vigorously blown air passes through the central through-hole formed in the plate material (12), creating a negative pressure in the area below the plate material (12>) in the furnace (1), causing the air to blow out. The remaining ash blown up by the air is further sucked up into the duct (13) above the furnace (1).

Further, in the upper part of the duct (13) inside the furnace (1), a large number of swirling vanes (5) having a fan-shaped cross section are arranged at an angle to swirl and raise the sucked up residual ash. One end of the swirl vane (5) is attached to the outer wall of the blow-up pipe (41), and the other end is attached to the inner wall of the furnace (1).

And an inclination adjustment member (5o) provided outside the furnace (1)
This allows the inclination of the blade (5) to be adjusted.

A connecting pipe (6) to the cyclone (3) is connected to the upper part of the duct (13), which separates the residual ash sucked up by the negative pressure generating mechanism (4) from the blown air and collects it.

The remaining ash is sent to the duct (13) by swirling by the swirling vane (5).
This connecting pipe (6) collides with the inner wall of the
It is guided to the cyclone (3) along with some of the blown air.

The cyclone (3) has a funnel shape, and a residual ash collection section (30) is provided at the bottom. The remaining ash carried by the blown air from the incinerator (1) through the connecting pipe (6) collides with the outer circumferential surface of the cylinder (31) in the cyclone (3) and falls into the collection section (30). It will be collected.

In addition, the remaining ash conveying means such as a truck is arranged below the collection part (30) or directly below the cyclone (3) by omitting the collection part (30), and the remaining ash separated and collected by the cyclone is disposed. transport.

Then, the blast air from which the residual ash has been separated is conveyed to the circulation blower (2) through the connecting pipe (7), and the combustion materials in the incinerator (1) are combusted again, and the residual ash after combustion is transferred to the incinerator (1). ) Used to blow air up to the upper duct (13).

In addition, (9) and (10) in Fig. 1 both indicate dampers, and the damper (9) is installed in the middle of the connecting pipe (7), and is carried to the circulation blower (2) in the furnace (1). This adjusts the amount of air sucked into the blown air used for re-combustion, etc. On the other hand, the damper (10) is attached to the intake port for air taken in from the outside, and serves to keep the oxygen concentration of the air used for combustion at an appropriate level and to adjust the temperature of the blown air.

An incinerator with the above configuration is used to dispose of plastic.

When wastes consisting of wood, rubber, etc. were burned and the emitted dust concentration near the upper opening of the duct (13) of the incinerator (1) was measured, all of them were found to be less than 0.2 g/Nm'. and favorable results were obtained.

The shape of the incinerator (1) may be circular in horizontal cross section as shown in FIG. 2, or rectangular in horizontal cross section as shown in FIG. 3. Further, in the above embodiment, a plurality of air inlets (11) are provided in upper and lower stages, but they may be formed in multiple upper and lower stages (not shown). ) in the blow-up pipe (4
The blower (2) is also used to blow air to 1), and the blower (40
) is also possible. Various other design changes can be made without changing the gist of the invention.

<Effects of the Invention> According to the incinerator of the present invention having the above-mentioned configuration, an air inlet for combusting the combustion materials in the furnace and blowing up the remaining ash is provided near the lower part of the incinerator wall on the lower side of the furnace. Since it is formed facing or horizontally, the residual ash after combustion can be blown upward into the furnace, and it is possible to prevent the residual ash after combustion from accumulating in the lower part of the furnace.

A negative pressure generation mechanism is installed in the duct above the incinerator, as well as swirling blades that swirl and lift the remaining ash, and a connecting pipe to the cyclone is connected to the top of the duct.
The blown up residual ash rises to the upper part of the duct by the negative pressure generating mechanism, and rises while colliding with the inner wall surface of the duct by swirling by the swirling blades. Then, it is guided to the cyclone through a connecting pipe installed at the top of the duct. Therefore, the concentration of emitted dust at the upper opening of the duct can be kept low, which is preferable.

In the cyclone, the remaining ash is separated from the blast air, e.g.
The ash can be collected in a collection box installed at the bottom of the cyclone, and unlike conventional incinerators, there is no need to stop the incineration operation to collect the ash, making it easy to collect and process the ash.

Further, there is no need to provide a complicated mechanism such as a cooling device for separating and recovering residual ash from the combustion material, and the waste can be incinerated at low cost.

The blown air after the residual ash has been separated is conveyed to a circulation blower through a connecting pipe, and can be reused by the circulation blower to burn the combustion materials in the incinerator.

Furthermore, according to the present invention, in conventional incinerators, the network of the mesh member that is generated when burning waste that has materials that flow when heated, such as plastics and rubber, can be used to prevent these fluid combustion materials. Eliminates harmful effects such as the inability to supply the air necessary for combustion into the furnace due to blockage, etc.
It is possible to provide an unprecedented and suitable incineration device for all types of waste including wood, plastics, rubber, etc.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing one embodiment of the incinerator of the present invention, FIG. 2 is a horizontal sectional view of the incinerator, and FIG. 3 is a horizontal sectional view showing a modified example. (1)...Incinerator, (11>...Air inlet, (13)...Duct (2)...Circulating blower, (3) Cyclone, (4) Negative pressure generation mechanism, (5) Swivel vane, (6) (7) Connecting pipe.

Claims (1)

[Claims] 1. Incinerator, circulation that sends air into the incinerator Equipped with a ring blower and cyclone, Near the bottom of the incinerator wall, there is a Circulating feed that blows the remaining ash upwards Connect the air inlet from the fan to the lower side of the furnace. It is formed horizontally or towards the There is no blow-up in the duct above the furnace. A negative pressure generator that sucks up the remaining ash As well as creating a system, it is being sucked up. A swirling blade is installed to swirl and lift the remaining ash. In addition, there is a negative pressure at the top of the duct. The remaining ash sucked up by the generation mechanism is blown out. into a cyclone that separates it from the air and collects it. A connecting pipe is connected to the cyclone, After the residual ash has been separated, the air is sent to the above circulation blower. The special feature is that the connecting pipe that enters the Incinerator with special features.