JP3134129B2 - Ash treatment method and equipment for underground incinerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to incinerated materials such as garbage and waste plastics such as wood and paper from business establishments and the like, water-containing wastes having relatively low water content, and wastes such as cut grass for golf courses. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incinerator for incineration and treatment, and particularly to a method and an apparatus for treating ash in an underground apparatus.

[0002]

2. Description of the Related Art Underground incinerators have been provided in order to improve labor-saving and workability, mainly for charging incineration materials. In other words, a large amount of waste is batch-injected from the ground into a combustion furnace formed by excavating the ground, facilitating the injection work, and after ignition, it can be performed overnight without any special operation operation. Has the advantage that it can be completely burned.

However, in this underground incinerator,
Because the incinerator is located underground, there is a problem that it is difficult to perform residual ash treatment after incineration of the incinerated material.

[0004] That is, in this ash removal operation, an operator enters the furnace into the furnace where preheating remains, scrapes off the residual ash in the furnace to the ash outlet using a shovel or the like, and removes the residual ash with a baking machine and a chain block. The ash is discharged outside the furnace, and these operations require a lot of labor, and the dust ash soars when scraping the residual ash, and the workers working inside the furnace suck the dust. In some cases, there are problems such as adversely affecting the human body.

On the other hand, in an apparatus having a combustion furnace on the ground, compressed air is blown out from the bottom corner of the hearth to fly the ash, and the fly ash is collected by a dust collector. (JP-A-57-733)
No. 19).

[0006]

In the above method, in the case of blowing compressed air from the bottom of the hearth, the compressed air is directly applied to the combustion material. Or the incineration time is prolonged. Therefore, although it is necessary to carry out the post-combustion process, a post-combustion ash treatment step is required, and after the elapse of the post-combustion time, the ash solidifies, resulting in a very low efficiency. Further, when the air is blown out from the corner in this manner, the air does not reach the center and the ash remains near the center.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks, and to provide an ash treatment apparatus for an underground incinerator capable of blowing off ash without lowering the combustion temperature during burning fire. It is intended for.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the ash treatment method of the present invention is characterized in that the side wall at the bottom of the incinerator near the hearth has an inclination angle of 5 to 2 with respect to the horizontal direction.
Air is blown out at 0 degrees downward and at a diffusion angle of 60 to 150 degrees to blow off ash remaining on the hearth.

In the ash treatment apparatus of the present invention, a plurality of openings are provided on the side wall near the hearth at the bottom of the incinerator at horizontal intervals, and a plurality of openings are provided on the hearth through nozzles installed in the openings. To the ash, the inclination angle 5 with respect to the horizontal direction
It is characterized in that the air is ejected in a range of 20 to 20 degrees downward and a diffusion angle of 60 to 150 degrees .

[0010]

According to the present invention, since the air is jetted from the nozzle provided on the side wall toward the ash on the hearth, the air does not directly act on the combustion material and does not lower the combustion temperature.

Further , since there is no obstacle in the direction in which the air is ejected, it is possible to reach the center.

[0012]

FIG. 2 is a structural view showing the concept of an underground incinerator in which the present invention is embodied. In the figure, reference numeral 1 denotes a combustion chamber formed by excavating the ground. A vent pipe 4 for supplying air from an external air supply blower 3 toward the upper part of the hearth 2 is provided below the hearth 2 provided at the bottom. Reference numeral 5 denotes an opening / closing door for closing an upper opening of the combustion chamber 1.
The door 5 is opened by sliding, and is closed during combustion. The door 5 has a vent 6 for introducing primary air. Further, cooling water is stored inside the door 5.

A flue 7 is provided in communication with one side wall of the combustion chamber 1, and the flue gas entering the flue 7 is discharged outside through a cyclone 8. . A smoke suppressor 9 is provided below the flue 7 so as to incinerate unburned substances in the flue gas discharged through the flue 7. Reference numeral 10 denotes an ejector fan for blowing air into the cyclone 8 portion.

FIG . 1 shows a cross section cut in a direction perpendicular to the structural view of FIG. 2, and a pair of side walls 12 facing each other as shown in FIG. And at an upper position slightly higher than the hearth 4,
Opening holes 13, 13 penetrating inside and outside are formed, and the air ejection nozzles 14, 1
4 is inserted into the combustion chamber 1. The tip of the nozzle 14 is disposed slightly behind the end of the combustion chamber 1 in the opening 13 so that ash and unburned substances do not enter the nozzle 14 to cause clogging.

[0015] These nozzles 14, 14, is adapted to be supplied with compressed air via the compressor 15 pipe 16, the midway, the electromagnetic valve 17 is provided, the air jetting time I have control.
For example, when the exhaust gas injected into the combustion chamber 1 is ignited and the decomposition gasification combustion ends and the combustion proceeds to pre-ignition combustion, the electromagnetic valve 17 is opened to cause air to be ejected from the nozzle 14 to cause the pre-ignition combustion. Blow off the ash inside and remove the flue 7
From the outside. During this discharge, the unburned matter mixed in the ash is completely burned by the burner 9.

In the above, the nozzle (14), as shown in FIG. 3, inclined downward by an angle α with respect to the horizontal direction
By which, the air is ejected in a circular cross section in the range of the angular spread angle in the direction of the alpha beta. If the inclination angle α at this time is too large, the air does not reach the center of the furnace, and if it is too small, a considerable amount of ash remains near the furnace bottom. As a result, α = 5 to 20 degrees Preferably, it is set to about 15 degrees. On the other hand, if the diffusion angle β is too large, the air pressure enough to blow off the ash cannot be obtained. If the diffusion angle β is too small, the ash remains high in a mountain shape between the nozzles (14) (14) arranged horizontally. After all, 60 to 150 degrees, preferably 110
Set around degrees. In our experiments, α = 15
Degrees, β = 110 degrees gave the most desirable results. At this time, the installation height of the nozzle (14) should be 3 mm from the furnace bottom.
The distance between the nozzles (14) and (14) was 1 meter.

The opening and closing operation of the solenoid valve 16, for example by providing a timer or the like, opens the electromagnetic valve 16 after a predetermined time has elapsed from the ignition time, by means such as to close more after a certain period of time, completely The operation can be automatically performed. Further, as shown in FIG. 2, a plurality of the opening holes 13 are provided at intervals in the horizontal direction, and are arranged so that air acts on the ash on the hearth 4 as evenly as possible.

[0018]

As described above, according to the present invention, a nozzle is arranged on the side wall near the hearth, and air is ejected from the nozzle toward the ash on the hearth.
Unlike the conventional one, the air is blown into the upper part of the combustion material, so that the ash can be treated even during the combustion without lowering the combustion temperature, and therefore, as in the case of performing after the combustion, There is no inconvenience that the ash solidifies . In addition, the air is slightly above the hearth
Since jetting more inclination angle 5 to 20 degrees downward with respect to the horizontal direction, Ru can be blown off near the center of the ash sufficiently
At the same time, ash near the hearth can be blown off , and ash processing can be performed efficiently. In addition, the air
In order to squirt at a divergence angle of 60 to 150 degrees, the corner of the hearth
The ash can be blown off evenly.

[Brief description of the drawings]

FIG. 1 is a schematic vertical sectional view of a combustion chamber showing an embodiment of the present invention.

FIG. 2 is a structural view showing the concept of an underground combustion device.

FIG. 3 is an enlarged vertical cross-sectional view showing a portion that ejects air .

[Explanation of symbols]

 (1) Combustion chamber (2) Hearth (13) Opening hole (14) Nozzle (18) Ash

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Toyoharu Kumanasu 6-2-27 Nakanoshima, Kita-ku, Osaka Sekisui House Co., Ltd. (72) Inventor Takuji Okaya 3-1-1, Nakamachi, Minatojima, Chuo-ku, Kobe-shi, Hyogo Prefecture. 2 Kobe Port Village 2-519 (72) Inventor Noseiki Eda 3-7-31 Honjo-cho, Nada-ku, Kobe-shi, Hyogo Maison Yamato 401 (72) Inventor Tomo Tamada 3-, Chokojikita, Toyonaka-shi, Osaka 3-7 Heights No. 201 (56) References JP-A-4-60308 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F23J 1/00 F23G 5/00 119 F23G 5/00 ZAB

Claims (2)

(57) [Claims] 1. An inclination angle of 5 to 20 degrees downward and wide with respect to a horizontal direction from a side wall at a position near a hearth at the bottom of an incinerator.
An ash treatment method for an underground incinerator, characterized by blowing air at a divergence angle of 60 to 150 degrees to blow off ash remaining on the hearth. 2. A plurality of openings are provided on a side wall of the bottom of the incinerator near the hearth at intervals in the horizontal direction, and a nozzle installed in the opening horizontally feeds ash on the hearth.
Angle of inclination 5 to 20 degrees downward with respect to direction and diffusion angle of 60 to
An ash treatment device for an underground incinerator , wherein air is blown out in a range of 150 degrees .