JPH06265126A - Fire grate for refuse incinerator - Google Patents

Abstract

PURPOSE:To prevent an unexpected operational fault due to clogging of non-combustible material and to enhance establishment of a stable operation by minimizing an area of opposed surfaces for forming a gap between a stationary fire grate and a swing fire grate for constituting a fire grate of a refuse incinerator, and rapidly discharging the material clogged in the gap by reciprocating swinging motion of the swing grate. CONSTITUTION:Stationary fire grates 2 and swing fire grates 3 alternately arranged perpendicularly to a moving direction of refuse in a refuse incinerator are formed in a stepped shape of a down gradient along the moving direction of the refuse, a section perpendicular to the moving direction of the refuse is formed in an inverted protruding shape, and height and length of opposed surfaces of upper wide parts 4, 5 of the stepped shape parts of the adjacent grates 2 and 3 are slightly larger than a combined reciprocating swinging distance of vertical and longitudinal directions of the grates 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grate which is installed and installed in a refuse incinerator and which comprises a fixed grate and a rocking grate for burning the refuse while transferring it.

[0002]

2. Description of the Related Art A grate in a refuse incinerator used in cities and the like generally has a step-like slope with a downward slope along the moving direction of the refuse, and it is exclusively a fixed grate in a direction orthogonal to the moving direction of the refuse. The rocking grate, which is reciprocally rocked by hydraulic drive, is installed and installed alternately.The dust thrown into the incinerator through the charging port is moved while burning toward the discharge port, and near the discharge port. Designed to be ash.

In the operation of this type of refuse incinerator, it is an important requirement that stable and trouble-free incineration can be performed, and one of the factors that hinders the achievement of this requirement is the fixed grate and the swing. In view of the fact that non-combustibles such as iron and aluminum are clogged in the gap with the grate and a large load is applied to the rocking motion of the rocking grate, the hydraulic system used for operating this rocking grate is usually There is room to handle large loads within the range that does not affect the equipment.

[0004]

However, there is a limit to the load that can be dealt with, and the incombustibles may gradually become clogged to increase the load, resulting in an inoperable operation. Taking this into consideration, we regularly clean and remove incombustibles,
Although we are striving for stable operation, if a large amount of iron, aluminum, etc. is mixed in the incineration object, it will suddenly become inoperable and it will be necessary to quickly remove the incombustible material clogged in the gap. Often there were problems such as the need for it.

The present invention minimizes the area of the opposing surface forming the gap between the fixed grate and the swing grate in this type of incinerator, and the incombustibles clogged in this gap are the same as those of the swing grate. Reciprocating rocking motion enables quick discharge,
Preventing unexpected driving failures due to clogging of incombustibles,
The purpose of the present invention is to provide a grate for a refuse incinerator that can enhance the establishment of stable operation.

[0006]

In order to solve the above problems, the grate of the incinerator of the present invention is a fixed grate which is installed and installed alternately in a direction perpendicular to the moving direction of the refuse in the refuse incinerator. An oscillating grate is a staircase with a downward slope along the moving direction of dust, and the cross section orthogonal to the moving direction of dust is an inverted convex shape. The height and length of the facing surface of the upper wide part of each stair-shaped part with the grate is characterized by being slightly larger than the distance in the up-down direction and the front-back direction of the reciprocating rocking motion of the rocking grate. is there.

[0007]

The grate consisting of the stair-shaped fixed grate and the rocking grate, which are alternately installed and installed in the refuse incinerator according to the present invention, has a wide upper portion in which both side walls face each other to form a gap. Since the area of the opposing surface of the section is minimized, even if the incombustibles are clogged in the gap between the fixed grate and the swing grate during operation, the incombustibles will be in the up-down direction and the front-back direction of the swing grate. The combined reciprocating rocking motion of the directions allows quick discharge, and it is possible to prevent driving failures due to clogging of incombustibles.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 designates a grate, which is a down-gradient installed along the moving direction of the dust thrown into the furnace and arranged in parallel at substantially equal intervals. Each of the fixed grate 2 has a staircase-shaped fixed grate 2, ... And a rocking grate 3, ... Installed between the fixed grate 2 ,. 2 and each rocking grate 3, the cross section orthogonal to the moving direction of dust is not a reverse convex shape,
It consists of wide parts 4, 5 at the top and narrow parts 6, 7 at the bottom.

Further, as shown in FIG. 2, the rocking grate 3, ... Is fitted in a hydraulic cylinder 11 which is rotatably supported at the rear end thereof, and is reciprocated back and forth by the thrust of the hydraulic device 10. The sliding body 1 provided at the tip of the piston rod 12 of the piston to be connected and connected to the swing grate 3, ...
A sliding surface 15 of a rocking regulation body 14 on which 3 is slid,
A sliding body 13 'which is hung vertically from the rocking grate 3, ... Is rocked by a sliding surface 15' of a rocking regulating body 14 'which is slid, and this rocking is a forward movement in which the vertical direction and the front-back direction are combined. A reciprocating rocking motion of ascending A and descending B is repeated.

FIG. 3 shows a position where the rocking grate 3, ... Is most advanced and raised with respect to the fixed grate 2 ,.
Shows the positions where the rocking grate 3, ... Is most retracted and descended with respect to the fixed grate 2, .. At this time, the fixed grate 2, ... and the swinging grate 3 ,. On the facing surfaces 8, ... and 9, ... of the wide portions 4, ..., 5, ... facing each other, the dimension in the height direction of the facing facing surface portion actually facing and facing is the minimum.

FIG. 5 shows a state in which the rocking grate 3, ... Is in the middle position of the rocking range. At this time, the fixed grate 2, ... And the rocking grate 3 ,. Part 4, ...
The facing surfaces 8, ..., 9, and ... of 5, 5, ... Are opposed to each other over the entire surface, and the upper surfaces of the wide portions 4 ,.

Although not shown in the drawing, the wide portions 4, ... And 5, ... Of the fixed grate 2, ... And the swing grate 3 ,.
The actual length of the facing facing surface portion in the length direction along the moving direction of the dust of the facing surfaces 8, ... And 9, ... of No. 6 is the maximum at the intermediate position shown in FIG. It is minimized at the most advanced position and the most retracted position shown in (1).

In this way, by making the cross sections of the fixed grate 2, ... And the rocking grate 3, ... Inverted convex shapes, the fixed grate 2, ... And the rocking grate 3, .. And the facing surfaces 8, ... and 9, of the upper wide parts 4 ,.
It has become possible to make the height and length of ... a facing surface having a minimum facing area, which is slightly larger than the distance in the up-down direction and the front-back direction of the reciprocating swing motion of the swing grate 3 ,.

[0015]

As is apparent from the above description, according to the present invention, the area of the opposing surface of the fixed grate and the rocking grate, which are alternately installed and installed, in this type of refuse incinerator can be set. Since it was made as small as possible, during the operation, the gap between the fixed grate and the swing grate, that is, the incombustibles clogged between the facing surfaces will be quickly discharged by the reciprocating swing motion of the rocking grate. As a result, it was possible to prevent accidental driving failures due to clogging of incombustibles and enhance the establishment of stable operations.

Furthermore, the ability to discharge incombustibles promptly reduces the load on the reciprocating rocking motion of the rocking grate, and has been used for operating the rocking grate in conventional refuse incinerators. It is no longer necessary to give an excessive margin like a hydraulic system.

[Brief description of drawings]

FIG. 1 is a schematic perspective view for explaining a grate of an incinerator according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a rocking mechanism of a rocking grate of a refuse incinerator according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining a relative positional relationship with a fixed grate when the swing grate forming the grate according to the embodiment of the present invention is most advanced.

FIG. 4 is a diagram for explaining a relative positional relationship with a fixed grate when the swing grate forming the grate according to the embodiment of the present invention is most retracted and lowered.

FIG. 5 is a diagram for explaining a relative positional relationship with a fixed grate when the swing grate forming the grate according to the embodiment of the present invention is at an intermediate position.

[Explanation of symbols]

 1 Grate 2 Fixed Grate 3 Swing Grate 4,5 Upper Wide Part 6,7 Lower Narrow Part 8,9 Opposite Faces of Fixed Grate and Swing Grate 10 Hydraulic System 11 Hydraulic Cylinder 12 Piston Rod 13 Sliding body 14 Swinging regulation body 15 Sliding surface

Claims (1)

[Claims] 1. A fixed grate and an oscillating grate, which are alternately installed and installed in the refuse incinerator in a direction perpendicular to the direction of movement of the refuse, form a downward slope along the direction of movement of the refuse. , The cross section orthogonal to the direction of movement of the dust is an inverted convex shape, and the height and length of the facing surface of the upper wide part of each stair-shaped part of the adjacent fixed grate and rocking grate are oscillating. A grate for a refuse incinerator characterized in that the vertical reciprocating motion of the dynamic grate is slightly larger than the vertical distance.