KR102498065B1 - Droppingstep grate for incinerator - Google Patents

Abstract

Disclosed is a drop stage grate for an incinerator, which can effectively prevent waste from entering the gap between a drying stage, a combustion stage, and a post-combustion stage when an incinerator operates, and can solve a problem that waste fallen and stacked near the shear wall of a drop stage does not move. In the drop stage grate for an incinerator, the drying stage, the combustion stage, and the post-combustion stage of the incinerator each include one or more moving grate rows and one or more fixed grate rows. The moving grate rows and the fixed grate rows are alternately arranged to be adjacent to each other. In the incinerator in which a lower portion of the shear wall of a moving grate reciprocates and slides relative to the upper wall of a fixed grate adjacent thereto, the drop stage is formed at the boundary between the drying stage, the combustion stage, and the post-combustion stage. An upper portion of the shear wall protrudes from the shear wall of a front grate to form an inclined surface.

Description

Dropping step grate for incinerator {Droppingstep grate for incinerator}

The present invention relates to a grate for an incinerator, and more particularly, to a grate for breaking a fall of an incinerator.

The key to the waste treatment policy is to efficiently use resources, collect them from nature to a minimum, and return used resources to nature to preserve the natural environment and preserve human health. will be.

In general, after waste such as municipal waste is put into an incinerator, it is dried, burned, and incinerated in a stoker-type conveying device including heat-resistant/wear-resistant metal grates arranged on the lower side of the incinerator.

This Stoka-type incinerator is composed of a drying stage for drying waste, a combustion stage for primary incineration of waste, and a post-incineration stage for final combustion, and is composed of a downward slope, and several layers of grates are configured in a cascading fashion for each incineration stage. The grate that transfers and stirs the waste from the top to the bottom consists of a fixed grate and a moving grate alternately.

In the grate constituting such a Stoka-type conveying device, a plurality of heat-resistant/abrasion-resistant metal grate rows are supported by round bars to form one row, and these grate rows are divided into a fixed end and a moving end, and are stepped in a stepwise manner. are placed alternately.

The fixed end is mounted on the fixed frame of the conveying device by the round bar for the fixed end, and the moving end is attached to the movable frame of the conveying device by the round rod for the moving end. It operates in a way to sequentially move the waste to the exit side while reciprocating back and forth in the

In this process, in the incinerator, as shown in FIG. 1, the boundary between the incineration stage and the incineration stage (the combustion stage 20 and the post-incineration stage 30 in FIG. 21) and the upper wall of the grate 31 of the subsequent incineration stage (post-incineration stage), a gap (G) that is more than the thickness of the grate is generally formed, and when the incinerator is operated, the waste moved into this gap (G) flows in to incinerator It is not processed and piled up in the incinerator, so the entire incinerator does not perform its function, and the operator has to go in and remove the waste, and there is also a safety problem because a person works in the incinerator.

Conventionally, in order to solve this problem, a fireproof reinforcing material, castable, is filled in the gap between the lower end and the upper wall of the grate of the subsequent incineration stage, or a method of filling the gap with an extra grate has been applied.

However, the method of filling the castable has a problem in that the castable is damaged by heat (see dotted line circle in FIG. 1), and thus a gap is generated again, and waste and damaged castable are introduced together into this part. However, the method of filling with an extra grate is not only difficult to completely prevent the inflow of waste, but also has problems with the operation efficiency and safety of the incinerator due to its weight.

Accordingly, the present inventors have proposed a structure in which a barrier wall integrally extends below the shear wall so as to contact the upper wall of the grate of the subsequent incineration stage in Patent Application No. 10-2020-0062183 ( see FIG. 1, numeral 40), Since the drop end is vertically extended, the problem of not being able to move waste accumulated by falling near the front end wall of the drop end has not yet been solved despite the reciprocation of the moving end at the rear end.

[Prior patent literature]

- Japanese Unexamined Patent Publication No. 2016-211835 (2016.12.15)

- Registered Utility Model Publication No. 20-0471741 (2014.03.11)

The present invention has been made to solve the above-described problems of the prior art, and can effectively prevent waste from entering the boundary gap between the drying stage, the combustion stage, and the post combustion stage during operation of the incinerator, and near the shear wall of the drop stage. It is intended to provide a grate for blocking the fall of an incinerator that can solve the problem that wastes that have fallen and accumulated cannot be moved.

In order to solve the above problems, the present invention, the drying stage, the combustion stage, and the post combustion stage of the incinerator each include one or more moving grate rows and one or more fixed grate rows, and the moving grate rows and the fixed grate rows are alternately arranged adjacent to each other. And, in an incinerator in which the lower part of the shear wall of the movable grate slides back and forth relative to the upper wall of the adjacent fixed grate, the grate for preventing the fall of the incinerator forming the drop-off stage at the boundary between the drying stage, the combustion stage, and the post-incineration stage, wherein the upper part of the shear wall Protrudes from the front wall of the front grate to provide a grate for blocking the fall of the incinerator forming an inclined surface.

In addition, the inclined surface has an inclination angle of 5 to 30 ° and provides a grate for blocking the fall of the incinerator, characterized in that it is formed up to a point of 1/4 to 3/4 based on the height.

In addition, the drop-breaking grate and the front end grate provide a drop-breaking grate of an incinerator, characterized in that a fixed grate.

According to the present invention, as a grate forming a drop-off stage at the boundary between a drying stage, a combustion stage, and a post combustion stage in an incinerator, the upper portion of the shear wall protrudes from the shear wall of the front stage grate to form an inclined surface, so that waste is removed from the dry stage when the incinerator is operated. , it is possible to minimize the phenomenon in which wastes are not moved by preventing wastes from falling near the shear wall of the falling stage while completely blocking the inflow into the boundary gap between the combustion stage and the post combustion stage.

In addition, the slope protruding from the front wall does not extend to the rear grate, thereby minimizing the weight increase by adopting a structure to fundamentally prevent waste inflow and accumulation of waste, while minimizing the reduction in incinerator operation efficiency due to the weight increase due to structural deformation of the grate. can do.

1 is a photograph showing the boundary of an incineration stage in a conventional incinerator.
2 and 3 are a front view and a perspective view respectively showing a grate for breaking a drop according to an embodiment of the present invention.
4 and 5 are front views showing a rearward movement grate and a forward movement, respectively, with the drop-blocking grate installed according to an embodiment of the present invention.
6 and 7 are perspective views showing a reverse state and a forward state of the rear-end moving grate, respectively, with the drop-blocking grate according to an embodiment of the present invention installed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted. In order to clearly explain the present invention in the drawings, parts irrelevant to the description have been omitted, similar reference numerals have been assigned to similar parts throughout the specification, and detailed configuration directions of the present invention will be described with reference to the drawings. Also, throughout the specification, when a part "includes" a certain component, it means that it may further include other components, not excluding other components, unless otherwise stated.

2 and 3 are a front view and a perspective view respectively showing a grate for breaking a drop according to an embodiment of the present invention.

1 to 3, in the grate 100 for breaking the drop according to the present invention, the shear wall 110 extends downward to contact the upper wall 210 of the grate 200 of the subsequent incineration stage, and the shear wall 110 The upper part of ) protrudes from the front end wall 310 of the front end grate 300 to form an inclined surface 120.

In general, the drying stage 10, the combustion stage 20, and the post-incineration stage 30 of the incinerator each include one or more movable grate rows and one or more fixed grate rows, and the movable grate rows and the fixed grate rows alternately adjoin each other. The lower part of the shear wall of the movable grate slides back and forth relative to the upper wall of the adjacent fixed grate, and the shear wall of the movable grate pushes the waste located on the upper wall of the fixed grate to move the waste. As shown in FIG. 1, the incineration stage and The boundary of the incineration stage (see the combustion stage 20 and the post combustion stage 30), that is, between the drop stage 21, which is the last row of the incineration stage, and the upper wall 32 of the grate 31 of the subsequent incineration stage is generally A gap (G) of the thickness of the grate is formed, and when the incinerator is operated, wastes moved into the gap (G) flow in and are not treated on the incinerator and accumulate at the bottom of the incinerator.

4 and 5 are front views showing a backward and forward state of the rear-end moving grate with a drop-blocking grate installed according to an embodiment of the present invention, respectively, and FIGS. 6 and 7 are respectively an embodiment of the present invention. It is a perspective view showing the backward and forward state of the rear-end movement grate with the drop-blocking grate installed according to.

4 to 7, in the present invention, the shear wall 110 extends downward in the grate 100 of the drop stage, and adheres to the upper wall 210 of the grate 200 of the subsequent incineration stage, thereby reducing waste Inflow can be prevented from the source. Furthermore, when the drop end is vertically extended without forming the inclined surface 120 as in the prior art, despite the reciprocation of the rear moving end grate 200, it falls near the front wall 110 of the drop end grate 100 There was a problem that the accumulated waste (see FIGS. 4 and 5, 'A' area) could not be moved.

In the present invention, in order to prevent the occurrence of a space between the drop-stage grate 100 and the subsequent incineration stage grate 200, the shear wall 110 has a lower surface of the subsequent incineration stage grate 200 It may be formed in a length that is in close contact with the upper wall 210 of the. If the lower surface of the shear wall 110 does not come into close contact with the upper wall 210 of the grate 200 of the subsequent incineration stage, the waste is transferred to the space generated between the grate 100 for falling and the grate 200 of the subsequent incineration stage. can be infiltrated.

According to an example of the present invention, the drop grate 100 may be a fixed grate together with the front grate 300. When the drop-blocking grate 100 is configured as a fixed grate, it is possible to minimize the risk of reduction in operation efficiency of the incinerator and damage to the grate due to movement due to the relatively increased weight of the grate.

Here, in the present invention, the upper part of the shear wall 110 protrudes from the shear wall 310 of the front stage grate to form an inclined surface 120, so that the shear wall of the drop grate 100 ( 110) solves the problem that the waste (W) that has fallen and accumulated in the vicinity (see FIGS. 4 and 5, 'A' area) cannot be moved.

That is, since the waste W falling from the front grate 300 falls along the inclined surface 110, it falls to the grate 200 of the next incineration stage at a more advanced position in the moving direction, and is the moving stage of the next incineration stage. When the grate 200 is retracted, it is possible to prevent waste from being accumulated near the shear wall 110 of the drop grate.

At this time, the inclination angle O of the inclined surface 120 is set in consideration of the extent to which the upper wall 210 on the shear wall side of the next moving stage grate 200 is partially exposed due to the structure of the incinerator even when the next moving stage grate 200 retreats. In the present invention, the inclination angle O may be 5 to 30 °, preferably 10 to 25 °, and more preferably 15 to 20 °.

In addition, the formation length (L1) of the inclined surface 120 may be formed from the point where the inclined surface starts to 1/4 to 3/4 of the drop height (L2) based on the height, preferably 1/3 to 7/10 points, more preferably 2/5 to 3/5 points.

That is, it may be considered to structure the inclined surface 120 up to the upper wall 210 of the next moving end grate 200, but the phenomenon in which falling waste is piled up near the front end wall 110 of the drop grate 100 and cannot be moved When the length of the inclined surface 120 is minimized to the extent that can be prevented, it is possible to minimize the decrease in incinerator operation efficiency due to the increase in weight due to structural deformation of the grate 100. However, when the length L1 of the inclined surface 120 is excessively short, the falling waste may not be sufficiently advanced in the moving direction and not fall.

As described above, in the present invention, the lower part of the shear wall 110 of the grate 100 for falling off of the incineration stage (the drying stage 10 in FIGS. 6 and 7) follows the incineration stage (the combustion stage 20 in FIGS. 6 and 7). )) is closely attached to the upper wall 210 of the grate 200, and the upper part of the shear wall 110 protrudes from the shear wall 310 of the front grate 300 to form an inclined surface 120, so that waste is removed from the drying stage when the incinerator is operated. (10) A phenomenon in which waste is not piled up and moved by preventing waste from falling near the shear wall 110 of the drop while completely blocking the inflow into the boundary gap between the combustion stage 20 and the post combustion stage 30 can be minimized. Accordingly, not only the incineration efficiency and the lifespan of the incinerator are improved, but also the operation of the incinerator is safe by minimizing the worker's waste removal work.

Above, the preferred embodiment of the present invention has been described in detail with reference to the drawings. The description of the present invention is for illustrative purposes, and those skilled in the art will understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the scope of the present invention is indicated by the following claims rather than the description of the invention, and all changes or modifications derived from the meaning, scope and equivalent concepts of the claims are interpreted to be included in the scope of the present invention. It should be.

10: drying stage 20: combustion stage
30: Post-incineration stage G: Incineration stage boundary gap
100: Grate for blocking 110: Shear wall
120: slope 200: grate of the subsequent incineration stage
210: upper wall of the grate of the subsequent incineration stage 300: front stage grate
310: shear wall of front grate W: waste
O: Inclination angle L1: Formation length of the inclination surface
L2: drop height

Claims (3)

The drying stage, the combustion stage, and the post combustion stage of the incinerator each include one or more movable grate rows and one or more fixed grate rows, the movable grate rows and the fixed grate rows are alternately disposed adjacent to each other, and the lower part of the front end wall of the movable grate is adjacent. In an incinerator sliding reciprocally relative to the upper wall of a fixed grate, a drop-blocking grate of an incinerator forming a drop-block at the boundary between the drying stage, the combustion stage, and the post-incineration stage,
The upper part of the shear wall protrudes from the shear wall of the front grate to form an inclined surface,
The inclined surface has an inclination angle of 5 to 30 ° and is formed from 1/4 to 3/4 point based on the height. delete According to claim 1,
The drop-breaking grate and the front-end grate are fixed grates.

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