JPH074635A - Grate structure of stoker type incinerator - Google Patents

Abstract

PURPOSE:To provide a grate structure for a stoker type incinerator in which a cooling effect of a grate is not lost while avoiding lack of combustion air to refuse to be incinerated as much as possible. CONSTITUTION:A cast housing 1 is partitioned by a plurality of ribs 2 formed along a longitudinal direction to form a plurality of gas channels P, a discharge hole 3 of the gas flowing in the channels P is formed at an end of the housing 1, and a communication hole 5 communicating with the channel P adjacent to the front end side of the rib 2 is formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a plurality of gas flow passages, which are partitioned by a plurality of ribs arranged along the longitudinal direction, in a housing, and the gas flow passages are provided at the tip of the housing. The present invention relates to a stoker structure of a stoker type incinerator in which a discharge hole for a gas flowing through a tank is formed.

[0002]

2. Description of the Related Art The stoker type incinerator's rostrut constitutes each block of the incineration zone for incinerating while conveying the waste put in the incinerator, and is for combustion provided from below the incineration zone. The air is supplied to the refuse to be incinerated on the upper surface of the incineration zone, while the air is cooled to prevent burnout such as high temperature corrosion due to corrosive gas generated by combustion. I was collecting. That is, as shown in FIG. 6, the conventional stoker type incinerator incinerator structure has a single gas flow path P formed by partitioning the housing 1 with a plurality of ribs 2 formed in a comb shape along the longitudinal direction. Then, the gas inflow hole 4 into the flow path P is formed in the bottom portion on the rear end side in the longitudinal direction of the housing 1, and the discharge hole 3 for the gas flowing in the flow path P is formed in the front end side wall in the longitudinal direction of the housing 1. Was.

[0003]

SUMMARY OF THE INVENTION However, the above-described conventional stoker type incinerator's rostrut structure is more effective due to the combustion air that meanders along the gas flow path formed by a plurality of ribs arranged in a comb shape. However, since the gas (air) discharge hole is formed in one place, if the dust enters the discharge hole and clogging occurs, the cooling effect will no longer be obtained. Not only does it not occur, but also the air for combustion cannot be supplied to the dust, which has a drawback that it has a very serious influence on the incineration process. The object of the present invention is to eliminate the above-mentioned drawbacks, while avoiding the deficiency of the combustion air to the waste to be incinerated as much as possible, and, without impairing the cooling effect of the rostrul, the stoker type incinerator rostrut structure. To provide.

[0004]

To achieve this object, the stoker type incinerator according to the present invention has a characteristic structure of a stowage structure which is divided into a plurality of ribs arranged in a longitudinal direction in a housing. A stoker structure of a stoker incinerator in which a plurality of gas flow paths are formed, and a discharge hole for gas flowing through the gas flow paths is formed at a tip end portion of the housing, and the gas flow path is adjacent to a front end side of the rib. The point is that a communication hole communicating with the gas flow path is formed.

[0005]

In other words, the combustion air as a fluid flowing through a plurality of gas flow passages formed by partitioning a plurality of ribs that are continuously provided in the housing along the longitudinal direction of the air flow has its tip at each flow passage. Ejected from the discharge holes formed in the portion, dust is supplied with sufficient combustion air, even if clogging by dust occurs in one of the discharge holes, the gas does not stay in the gas flow path, Since the flow can be secured through the communication hole that communicates with the gas flow path adjacent to the front end side of the rib, the cooling effect is not impaired.

[0006]

Therefore, according to the present invention, it is possible to avoid the deficiency of combustion air in the dust to be incinerated as much as possible, and
It is now possible to provide a stoker structure for a stoker type incinerator that does not impair the cooling effect of the rostr.

[0007]

Embodiments Embodiments will be described below with reference to the drawings. As shown in FIG. 1 to FIG. 3, the stoker type incinerator has a rostrur structure in which a housing 1 cast using stainless steel (SUS430 equivalent) or the like is provided with three ribs 2 formed along the longitudinal direction thereof. To form four gas flow paths P, a gas discharge hole 3 for the gas flowing through the gas flow path P is formed in a circular shape in the front surface 1a of the tip portion, and a gas flow path adjacent to the front end side of the rib 2 is formed. A communication hole 5 that communicates with P is formed.
In the discharge hole 3, a corrosive gas (HCl, HCl, etc.) generated by high temperature combustion in the vicinity of the air discharged from the discharge hole 3 is generated.
In order to prevent burnout such as corrosion with SO ₂ etc., cobalt alloy (Stellite 6 etc.) or nickel alloy (50
Ni-50Cr or the like) is internally fitted with a corrosion-resistant metal piece.
At the rear end of the housing 1, an arc-shaped recess 6 for pivoting a support member 16 spanned by a frame, which will be described later, is formed, and at the bottom of the housing 1 from the vicinity of the recess 6 to the tip side. A lid 7 is attached to the.

The waste incinerator using the above-mentioned roster is
As shown in FIG. 5, a hopper 10 for accumulating dust, a pusher 11 provided in the lower portion thereof, an incineration zone 12 for incinerating the dust thrown into the furnace, and an ash pit for collecting incinerated ash. 13 and the like.

The incineration treatment zone 12 has a three-stage treatment zone in which a drying zone a for drying dust while stirring and transporting it, a combustion zone b for burning it, and a post-combustion zone c for ashing are arranged in a stepwise manner in the transport direction. Configured. As shown in FIG. 4, each of the processing zones a, b, and c is a support member that is horizontally mounted on a fixed frame 14 and a movable frame 15 that can reciprocate back and forth along the transport direction with respect to the fixed frame 14. 16, processing zone 12
A plurality of rostrus are arranged in parallel in the width direction, and the rostruls provided on the fixed frame 14 and the rostrus provided on the movable frame 15 are alternately arranged along the transport direction. By reciprocating the movable frame 15 by using the hydraulic cylinder 17, the rostrut arranged on the movable frame 15 slides on the rostrut arranged on the fixed frame 14 and reciprocates diagonally up and down with the support member 16 as an axis. As a result, dust is pressed against the front end surface of the grate to be conveyed, thereby forming a stoker type conveying mechanism.

Below the incineration zone 12, there is provided a wind box 19 for supplying the combustion air from the blower fan 18 to the dust on the upper surface of the incineration zone 12 via a heater 20 which heats the combustion air using exhaust gas. The combustion air supplied from the wind box 19 is guided to the gas flow path P through the gap between the recess 6 of the grate and the lid 7, and when flowing through the gas flow path P, the ribs 2 and the like are generated. After absorbing the heat through it, it is ejected from the ejection hole 3 formed at the tip. When dust is clogged in one of the discharge holes 3 when the dust is transported by the above-described transport mechanism, air is guided to the adjacent gas flow path P via the communication hole 5 on the front end side of the rib 2, The flow of air in the gas flow path P corresponding to the discharge hole 3 is ensured to maintain the cooling effect of the rustle.

Another embodiment will be described below. In the above embodiment, an example in which the air for combustion is supplied via the grate has been described, but the gas is not limited to air, and other gas may be supplied. For example, a combustion type superheater provided for a power generation facility used for an incinerator may be supplied with oxygen-rich exhaust gas. In the previous example,
Although the example in which the circular discharge hole 3 is formed on the front surface 1a of the tip portion of the housing 1 has been described, the shape of the discharge hole 3 is not limited to this, and the discharge hole 3 is formed at the front end. The position is not limited to the surface, and may be anywhere on the tip 1a.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

1 is a partially cutaway plan view of the Rostrul

[Fig.2] Longitudinal section of Rostrul

FIG. 3 is a cross-sectional view of the rostr

FIG. 4 is a perspective view of a stoker-type transfer mechanism.

FIG. 5: Block diagram of incinerator

FIG. 6 is a cross-sectional view of a conventional Rostru

[Explanation of symbols]

 1 case 2 rib 3 discharge hole 5 communication hole P gas flow path

Front page continuation (72) Inventor Noboru Matsui 1-1-1 Hama, Amagasaki City, Hyogo Prefecture Kubota Technology Development Laboratory Co., Ltd. (72) Inventor Tsutomu Shimizu 1-1-1 Hama, Amagasaki City, Hyogo Prefecture Kubota Technology Development Co., Ltd. In the laboratory

Claims (1)

[Claims] 1. A plurality of gas flow passages (P) partitioned by a plurality of ribs (2) arranged along the longitudinal direction of the housing (1) are formed in the housing (1), and the gas flow paths (P) of the housing (1) are formed. It is a stoker structure of a stoker type incinerator in which a gas discharge hole (3) flowing through the gas flow path (P) is formed at a tip portion, and the gas flow path (adjacent to the front end side of the rib (2) ( P), a stoker structure of a stoker incinerator having a communication hole (5) formed therein.