JPH01263411A - Waste material combustion device - Google Patents

Abstract

PURPOSE:To enable ashes and non-combsutibles to be processed without terminating combustion by a method wherein waste materials are dispersed from a ceiling part of a furnace and a pusher device is arranged at two-stage grid and a lower stage. CONSTITUTION:Waste tire chips 11 are dispersed into a boiler furnace 1 in volumetric manner from a chip hopper 3 installed at a ceiling part with a rotary feeder 2. The dispersed tire chips 11 are accumulated on a first stage grid 4 and their combustion is started. Non-ignited ashes dropped through inner-grid slits of the first-stage grid 4 are completely ignited on a second stage grid 5. Air enters from a combustion air inlet port 6 to a downward part of the second stage grid 5, passes through an air passing hole 5a and then the air is supplied as combustion air for the waste tire tips. Ashes and steel wires dropped from the first stage grid 4 are pushed out regularly to an ash taking-out port 8 by a pusher device 7. The waste tire chips 1 may continue a combustion on the first stage grid 4 even during a timing in which the ashes are being processed at the second stage grid 5.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is applicable to a boiler or an incinerator capable of incinerating waste materials such as sponge rubber, lumber, and plastics, particularly waste materials including incombustible materials such as waste tires. The present invention relates to a combustion device.

[Conventional technology]

■ Conventionally, waste tires were incinerated on a grate on a fixed bed, but because the waste tire chips were not evenly distributed in the furnace and mixed poorly with the combustion air, the amount of unburned particles was 30%.
% or more.

■ Most of the tires used these days are steel radial tires, but since it is difficult to remove the steel wire from these tires after combustion, it is possible to burn only normal tires that do not contain steel wire, or to remove the steel wire from the tires. For this reason, the furnace had to be shut down.

[Problem to be solved by the invention]

The conventional waste combustion apparatus has the following problems to be solved.

■ Burning waste tires on a fixed bed grate.

Due to poor air mixing in the waste tires, black smoke and odors are generated, as well as a large amount of unburned substances.

Combustion efficiency is reduced and ash disposal is expensive.

■ Steel wires contained in rubber tires.

After combustion, the fixed bed remains on the grate and blocks the air holes in the grate, so it is necessary to stop the furnace periodically (2-3 times per day) to remove the ash and steel wire.

[Means to solve the problem]

The present invention is a means to solve the above problems.

For those that burn waste containing non-combustibles on a fixed grate, there is a waste supply and dispersion device located on the ceiling of the furnace, and a heat-resistant device located in the furnace below the waste supply and dispersion device. a first grate, a second grate located below the first grate and shouldering air passage holes smaller than the gap in the first grate; It is characterized by comprising a combustion air supply port that communicates downward, and a pusher that is provided on the upper surface of the second grate and pushes out the combustion residue on the second grate to the ash removal port. This project proposes a waste combustion device.

[Function] Since the present invention is configured as described above, it has the fifth-order function.

- By dispersing waste tire chips from the ceiling of the boiler furnace, it is possible to uniformly scatter them onto the grate located below.

■ Since the grate is installed in two stages, the waste tire chips are burned in the first stage grate, the fine unburned ash is completely combusted in the second stage grate, and the first stage While combustion continues on the grate, the ash and steel wire that have fallen onto the second-stage grate can be taken out using a pusher.

〔Example〕

Fig. 1 is a longitudinal sectional side view of an embodiment of the present invention, Fig. 2 is a front view (viewed along arrow II-II in Fig. 1), and Fig. 3 is a cross-sectional view taken along the line ■-■ in Fig. 1. .

In these figures, (1) is the furnace, and (2) is the furnace (1
) is a rotary feeder as a waste supply and dispersion device arranged on the ceiling of the rotary feeder (3), and a chip hopper (3) is provided above the rotary feeder (2).

A first stage grate (4) is located in the furnace below the rotary feeder (2), and is composed of a large number of parallel hollow pipes. Air or water is allowed to flow through the hollow portion. (5) is a second stage grate provided below the first stage grate (4);
It has air passage holes (5a) smaller than the gap between the stage grate. The lower part of the second stage grate (5) communicates with the combustion air intake (6). (The power is the second stage grate (5) above.
This is a pusher installed on the top surface of the second stage grate (5) to push out the combustion residue on the second stage grate (5) to the ash outlet (8).

(9) is the overfire air supply port, and Q (I is the combustion gas outlet.

In such a device, waste tire chips aυ.

To ensure uniform distribution, the chips are stored in a chip hopper (3) installed on the ceiling, and quantitatively distributed into the boiler furnace (1) by a rotary feeder (2). The scattered tire chips (11) accumulate on the first stage grate (4) and begin to burn. The first stage grate (4) is cooled by flowing air or water into its hollow part in order to avoid burnout. In particular, when air is used, the air after cooling the grate is overfired. The air is supplied to the supply port (9) and used as secondary combustion air (overfire air) in the furnace to prevent smoke generation due to insufficient air in the furnace.

The unburned ash that has fallen through the inter-grid slits of the first stage grate (4) is further completely combusted on the second stage grate (5). Air enters the lower part of the second stage grate (5) through the combustion air intake (6), and the air enters the lower part of the second stage grate (5) through small air passage holes (
5a) is supplied as air for combustion of waste tire chips. The ash and steel wire that have fallen from the first stage grate (4) are periodically pushed out by force to the ash outlet (8). Ash treatment is carried out in the second stage grate (5). Even during the process, waste tire chips (
1) can continue to burn.

〔Effect of the invention〕

According to the present invention, first-order effects can be achieved.

■ By dispersing waste from the furnace ceiling.

It can be evenly distributed on the hearth grate and mixes well with the air.

- By using a two-stage grate and installing a pusher on the lower stage, ash and incombustibles can be disposed of without stopping combustion.

- Since the upper grate is cooled by air or water, burnout of the grate can be prevented, and the cooling effect can also prevent non-flammable materials from melting. Easily dispose of ash and incombustibles.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view of an embodiment of the present invention, FIG. 2 is a front view (view from ■-■ arrow in FIG. 1), and FIG. 3 is a fil-ITI cross-sectional view of FIG. 1. . (1)... Furnace; (2)... Rotary feeder; (3)... Chip hopper; (4)... First stage grate; (5)... Second stage fruit burning; (6)... Combustion air intake; (7)... Bush; (8)... Ash outlet; (9)... Overfire air supply port; 001 Combustion gas outlet;・Waste tire chips

Claims (1)

[Claims] In a device that burns waste containing non-combustible materials on a fixed grate, there is a waste supply dispersion device placed on the ceiling of the furnace, and a highly heat-resistant a second grate located below the first grate and having air passage holes smaller than the gap in the first grate; A waste product comprising a communicating combustion air supply port and a pusher provided on the upper surface of the second grate for pushing combustion residue on the second grate to the ash removal port. Combustion device.