JP2021050831A - Combustion device and combustion method of incineration facility - Google Patents

Abstract

To realize efficient combustion and simplification of a device by providing a storage part in the latter stage of a stoker furnace to allow ash containing an unburnt component to burn in a flameless state.SOLUTION: There is provided a combustion device of an incineration facility, comprising a storage part 6 that stores high temperature ash containing an unburnt component delivered from an incineration furnace to allow the ash to burn in a flameless state, an air hole 9 for sending air into the ash stored in the storage part 6, and discharge means of successively discharging ash stored on the bottom of the storage part 6, with the storage part 6 being disposed adjacent to and immediately after the stoker furnace 1, and the air hole 9 and a discharge port 10 of the discharge means being disposed to communicate with an air box of the stoker furnace.SELECTED DRAWING: Figure 1

Description

The present invention relates to a combustion device and a combustion method of an incineration facility, and in particular, incineration that realizes efficiency of combustion and simplification of the device by providing a storage unit for burning ash containing unburned components in the rear stage of the stoker furnace. Regarding the combustion equipment and combustion method of the facility.

Traditionally, incinerators equipped with stoker furnaces have been used in municipal waste and industrial waste treatment facilities. This stoker furnace has a function of sequentially drying, burning, and post-combusting the waste input from the waste supply port while transporting it on the drying stoker, the combustion stoker, and the post-combustion stoker.
In addition, a space (wind box) partitioned for each stoker is provided below each stoker furnace, and outside air is introduced into this air box using a blower or the like from below the stoker. It has a structure that supplies the necessary air.
The techniques of Patent Documents 1 and 2 are known as techniques related to incinerators in such waste incineration facilities.

Japanese Unexamined Patent Publication No. 2019-52222 JP-A-2002-22124

However, the techniques of Patent Documents 1 and 2 are configured to include a three-stage stalker, a dry stalker, a combustion stalker, and a post-combustion stalker, and may be provided with an air box for supplying air to each of them. There is a problem that the device becomes large and complicated.
The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a storage unit for burning ash containing unburned components in the subsequent stage of a stoker furnace for combustion. It is an object of the present invention to provide a combustion device and a combustion method of an incineration facility that realizes efficiency and simplification of the device.

As a means for achieving the above object, in the combustion apparatus of the incineration facility according to claim 1, a storage unit that stores and burns hot ash containing unburned content sent from the incinerator and stores the ash in the storage unit. It is characterized by being provided with an air hole for sending air to the ash and a discharge means for sequentially discharging the bottom ash stored in the storage portion.

In the combustion device of the incineration facility according to claim 2, in the combustion device of the incineration facility according to claim 1, the storage portion is arranged immediately after the stoker furnace, and the air holes and the discharge port of the discharge means are stokers. It is characterized in that it is arranged in communication with the wind box of the furnace.

The combustion device of the incineration facility according to claim 3 is characterized in that, in the combustion device of the incineration facility according to claim 1 or 2, a storage unit is arranged immediately after the combustion stoker following the dry stoker.

In the combustion device of the incineration facility according to claim 4, in the combustion device of the incineration facility according to claim 1, 2, or 3, the discharge means includes a mechanism for sliding and discharging the ash at the bottom of the storage unit. It is characterized by.

In the combustion method of the incineration facility according to claim 5, high-temperature ash containing unburned components sent from the stoker furnace is stored in a storage unit and burned for ok, and in the ok combustion, the air box of the adjacent stoker furnace is used. After supplying air and burning the ash for a predetermined time, the ash stored in the storage section was sequentially discharged from the bottom.

The combustion apparatus of the incineration facility according to claim 1 is provided with a storage unit that stores high-temperature ash containing unburned components sent from the incinerator and burns the ash, so that the amount of unburned material can be reduced by burning. descend. Therefore, the equipment can be omitted and energy can be saved.
Since the air holes for sending air to the ash stored in the storage section are provided, the unburned material is surely burned.
Since it is equipped with a discharge means for sequentially discharging the bottom ash stored in the storage section, the ash that has been burned is sequentially discharged.
In the present invention, the heat of high-temperature ash is stored by storing the heat, and the post-combustion is made more efficient with a small area, volume and a small amount of air.

In the combustion apparatus of the incineration facility according to claim 2, the storage unit is arranged immediately immediately after the stoker furnace, and the air holes and the discharge ports of the discharge means are arranged so as to communicate with the air box of the stoker furnace. It is easy to secure the air, and since the air box is supplied with air having an air composition and a temperature suitable for combustion, the air is used for efficient combustion.

In the combustion apparatus of the incineration facility according to claim 3, since the storage unit is arranged immediately after the combustion stalker following the dry stalker, the post-combustion stalker can be omitted, and the apparatus is simplified.

In the combustion device of the incineration facility according to claim 4, since the discharge means has a mechanism for sliding and discharging the ash at the bottom of the storage unit, the ash is reliably discharged from the bottom ash that has been burned.

In the combustion method of the incineration facility according to claim 5, high-temperature ash containing unburned components sent from the stoker furnace is stored in a storage unit and burned, and in the burning, the air box of the adjacent stoker furnace is used. After the air is supplied and the ash is burned for a predetermined time, the ash stored in the storage section is sequentially discharged from the bottom, so that the burning of the unburned material is reduced by the ash combustion. Therefore, it is possible to omit the post-combustion stalker, and the device can be simplified and energy can be saved.

It is a side view of the combustion apparatus which concerns on this Example. It is a top view of the combustion apparatus which concerns on this Example. It is a side view of the storage part of the combustion apparatus which concerns on this Example. It is explanatory drawing of the slide means of the combustion apparatus which concerns on this Example. It is a front view of the storage part of the combustion apparatus which concerns on this Example.

As shown in FIGS. 1 to 5, the incineration facility to which the combustion device of the present invention is applied includes a pusher 2 that sends the waste input from the hopper to the stoker furnace 1, and a drying stoker 3 that dries the sent waste. The main components are a combustion stoker 4 that burns the waste flowing from the dry stoker 3 in flames, and a storage unit 6 that temporarily stores and burns the hot ash 5 containing the unburned material sent out from the combustion stoker 4. It is supposed to be.
Here, "Oki" is a state of burning without raising a flame, and in the accumulated high-temperature ash, a phenomenon of burning without raising a flame (Oki burning) occurs.

Air boxes 7 and 8 are provided below the drying stoker 3 and the combustion stoker 4, respectively, and air is sent into the air boxes 7 and 8 by a blower or the like, and necessary air is supplied from under each stoker. Will be done.
The drying stoker 3 and the combustion stoker 4 are provided with a movable stoker that transports the waste in the transport direction, and the movable stoker transports the waste downstream while stirring the waste.
In the drying stoker 3, the sent waste is dried by receiving the air supplied from the air box 7 under the stoker and the heat of the adjacent combustion stoker 4.

In the combustion stoker 4, the sent waste is supplied with air from the air box 8 under the stoker and incinerated by a flame.
The ash generated in the combustion stoker 4 and the unburned material that could not be completely burned are transported downstream by the movable stoker and fall into the subsequent storage unit 6.

The storage unit 6 is connected to the downstream side of the combustion stoker 4, and the hot ash 5 containing the unburned portion that could not be incinerated by the combustion stoker 4 falls and is stored.
The storage portion 6 is a pocket-shaped portion having a rectangular shape in a plan view, has a width substantially the same as that of a stoker furnace, is formed to have a width in the front-rear direction narrower than the width, and a depth in the vertical direction is a width in the front-rear direction. It has a deeper shape.
The back surface, side surface, and bottom surface of the storage unit 6 are closed by a wall surface, and an air hole 9 and a discharge port 10 are provided on the front surface.
Three air holes 9 communicating with the air box of the combustion stalker are formed at equal intervals in the middle part of the height of the front side wall surface of the storage portion 6. The number, shape, size, and position of the air holes 9 are appropriately set.
The lower part of the front side wall surface of the storage portion 6 is opened to serve as a discharge port 10 leading to the air box.
On the bottom surface of the storage unit, a pusher 11 that slides after a predetermined time and pushes the ash at the bottom to the discharge port is arranged.
The pusher 11 is moved back and forth via a piston driven by a hydraulic cylinder 12 or the like.

Next, the operation of the present invention will be described.
The waste put into the hopper is sent to the stoker furnace 1 by the pusher 2, and the waste sent to the stoker furnace 1 is conveyed on the dry stoker 3 while air is supplied from the lower air box 7 and is adjacent to the waste. The waste is dried by receiving the heat of the burning stoker 4.
The dried waste moves while being agitated and is sent to the combustion stoker 4 downstream.
In the combustion stoker 4, air is supplied from the lower air box 8, waste is incinerated by a flame, and some ash falls from the stoker and is collected and collected in the lower part of the air box 8.
The ash generated in the combustion stoker 4 and the unburned material that could not be completely burned are transported downstream by the movable stoker and fall into the storage unit 6.
High-temperature ash containing unburned components sent out from the stoker furnace 1 is deposited in the storage unit 6, and since these are high-heat, a phenomenon of burning without raising a flame (Oki combustion) occurs.

Due to this combustion, the amount of unburned heat is reduced.
The ash accumulated in the storage unit 6 for a predetermined time is pushed by the pusher 11 driven by the hydraulic cylinder 12 and pushed out from the discharge port 10 to the air box 8 of the combustion stoker 4.
Since the storage unit 6 is provided with the air holes 9 and the discharge port 10 communicating with the air box 8 of the combustion stoker 4, the air is supplied from these and the oki combustion is efficiently performed.
In this embodiment, the hot ash 5 containing the unburned portion sent out from the stoker furnace 1 is stored in the storage unit 6 and burned, and in the burnt, air is supplied from the air box 8 of the adjacent stoker furnace. Then, after the ash is burned for a predetermined time, the ash 5 stored in the storage section 6 is sequentially discharged from the bottom, so that the burning of the unburned material is reduced by the ash burning. In addition, equipment can be omitted and energy can be saved.

Although the examples of the present invention have been described above, the specific configuration of the present invention is not limited to these examples, and even if there is a setting change or the like within a range not deviating from the gist of the invention, it is included in the present invention. Is done.
For example, although the configuration in which the post-combustion stoker is not provided in the combustion apparatus of the above embodiment has been described, the configuration including the post-combustion stoker is included in the present invention, and the function of the post-combustion stoker is added to the combustion stoker as needed. It is also possible to set the storage unit 6 in a combustion furnace other than the stoker furnace.
Further, the shape, depth, size, etc. of the storage unit 6 described in the above embodiment are appropriately set according to the combustion facility to be applied, the stoker furnace, the object to be treated, and the like.

1 Stalker Furnace 2 Pusher 3 Dry Stalker 4 Combustion Stalker 5 Ash 6 Reservoir 7 Wind Box 8 Wind Box 9 Air Hole 10 Outlet 11 Pusher 12 Hydraulic Cylinder

As a means for achieving the above object, in the combustion apparatus of the incineration facility according to claim 1, a storage unit that stores and burns high-temperature ash containing unburned components sent from the incinerator and stores the ash in the storage unit. It is provided with an air hole for sending air to the ash and a discharge means for sequentially discharging the bottom ash stored in the storage part, and the storage part is arranged immediately after the stoker furnace, and the air hole and the discharge means are provided. The discharge port is characterized in that it is arranged so as to communicate with the air box of the stoker furnace.

The combustion device of the incineration facility according to claim 2 is characterized in that, in the combustion device of the incineration facility according to claim 1 , a storage unit is arranged immediately after the combustion stoker following the dry stoker.

The combustion device of the incineration facility according to claim 3 is characterized in that, in the combustion device of the incineration facility according to claim 1 or 2 , the discharge means includes a mechanism for sliding and discharging the ash at the bottom of the storage portion. And.

The combustion method of the incineration facility according to claim 4 is a combustion method using the combustion device of the incineration facility according to claim 1, 2 or 3, and stores high-temperature ash containing unburned components sent from the stoker furnace. A method in which air is supplied from the air box of an adjacent stoker furnace, and after burning for a predetermined period of time, the ash stored in the storage section is sequentially discharged from the bottom. And said.

In the combustion apparatus of the incineration facility according to claim 1 , the storage unit is arranged immediately immediately after the stoker furnace, and the air holes and the discharge ports of the discharge means are arranged so as to communicate with the air box of the stoker furnace. It is easy to secure the air, and since the air box is supplied with air having an air composition and a temperature suitable for combustion, the air is used for efficient combustion.

In the combustion apparatus of the incineration facility according to claim 2 , since the storage unit is arranged immediately after the combustion stalker following the dry stalker, the post-combustion stalker can be omitted, and the apparatus is simplified.

In the combustion device of the incineration facility according to claim 3 , since the discharge means has a mechanism for sliding and discharging the ash at the bottom of the storage unit, the ash is reliably discharged from the bottom ash that has been burned.

In the combustion method of the incineration facility according to claim 4, high-temperature ash containing unburned components sent out from the stoker furnace is stored in a storage unit and burned for ok, and in the ok combustion, the air box of the adjacent stoker furnace is used. After the air is supplied and the ash is burned for a predetermined time, the ash stored in the storage portion is sequentially discharged from the bottom, so that the burning of the unburned material is reduced by the ash combustion. Therefore, it is possible to omit the post-combustion stalker, and the device can be simplified and energy can be saved.

Claims (5)

A storage unit that stores high-temperature ash containing unburned components sent from the incinerator and burns it.
An air hole for sending air to the ash stored in the storage section,
A combustion device for an incineration facility, which is provided with a discharge means for sequentially discharging the bottom ash stored in the storage section. The reservoir is located immediately next to the stoker furnace and is located adjacent to it.
The combustion apparatus of an incineration facility according to claim 1, wherein the air holes and the discharge port of the discharge means are arranged so as to communicate with the air box of the stoker furnace. The combustion apparatus of an incineration facility according to claim 1 or 2, wherein a storage unit is arranged immediately after the combustion stoker following the dry stoker. The combustion device for an incineration facility according to claim 1, 2, or 3, wherein the discharge means includes a mechanism for sliding and discharging the ash at the bottom of the storage unit. High-temperature ash containing unburned content sent from the stoker furnace is stored in the storage section and burned.
In the combustion, air is supplied from the air box of the adjacent stoker furnace.
A combustion method for incineration facilities, in which the ash stored in the storage section is sequentially discharged from the bottom after burning for a predetermined time.

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