KR100231495B1 - Grate for incineration of domestic waste - Google Patents

Abstract

An incinerator grille consists of a series of alternating and overlapping fixed (9) and moving bars with holes (10A) for an air flow from a blower chamber beneath the grille. The grille is bounded at the sides by at least one vertical edge plate (11) which has one or more recesses (11A) for the edge of a bar. The grille can have two edge plates, each with a series of recesses for the bar edges. Each recess extends from the lower edge (11B) of the plate and has an upper edge (11C) corresponding to the shape of a fixed bar.

Description

Household Waste Incineration Grid {GRATE FOR INCINERATION OF DOMESTIC WASTE}

The present invention relates to a grate for incineration of household waste.

Specifically, it comprises a row of fixed bars and a moving bar which translates on the fixed bar, wherein the fixed bar and the moving bar are interposed between each other, and the fixed bar and the moving bar are arranged under the grid. An orifice is provided for passing the blown air from the blower chamber, wherein the row of fixed bars relates to a grid for incineration of household waste, which is laterally bounded by at least one vertical side plate.

A grid of this kind is a grid in which waste is introduced into a well through a hopper, pressurized by a pressing member at the bottom of the space to the inclined grid where the waste is burned, and discharged to the cooling tank. As seen at the household waste incineration plant, which is transported to the end of the house.

Gratings of this kind are described in French Patent Publication No. 2 574 160.

At present, the bars in the grid of this kind are arranged in parallel with a minimum gap with respect to the side plates. This minimum clearance should allow for differential expansion of the bars and side plates and translational movement of the moving bars. Blowing air blowing into the blowing chamber below the grid and exiting vertically along the side plates exits through this gap.

This air flow constitutes a negligible amount of air leakage that is rarely used for the burning of waste, since about 50% of the blowing air is lost in this way in the case of a lattice bounded laterally by two side plates. .

The present invention solves this problem, and for this purpose, according to the invention, the side plate is provided with at least one hollow or recess into which the lateral edges of the fixing bar are fitted.

This configuration has three advantages.

A chicane-shaped air passage is obtained in the gap, which reduces the air flow rate through the passage. Therefore, it is possible to efficiently control the blowing air flow rate and reduce the emission of nitrogen oxides.

When exiting the zigzag air passage, the air flows substantially in the horizontal direction and enters the waste pile, thus contributing to the combustion of the waste efficiently.

A zigzag air passage prevents fine particles or small pieces of metal from the waste pile from passing through the passage. In contrast, the particles accumulate at the horizontal inlet of the zigzag passageway, making it easier to block the horizontal inlet, further limiting the leakage of air.

In a preferred embodiment of the present invention, in the case of a conventional grating bounded laterally by two vertical side plates, each side plate is provided with a series of recesses for receiving the side edges of each corresponding one fixed bar. do.

In order to facilitate manufacturing and to avoid the problem of canonical tolerances, this configuration is preferably used only for fixed bars corresponding to about 85% of the length of the lateral gap in the conventional design of this kind of grating.

Preferably, each recess is in the form of a rabbet with a vertical flat bottom extending to the bottom edge of the side plate and an upper edge having the same shape as the side profile of the corresponding fastening bar.

In this way, the fixing bar is fitted in the halfway recess with a minimum vertical gap for the bottom edge and a minimum horizontal gap for the top edge.

1 is a partial vertical cross-sectional view of a household waste incineration plant.

2 is a longitudinal partial cross-sectional view of the incineration grating;

3 is a front view of a side plate which forms part of an incineration grating of the kind according to the invention;

4 is a cross-sectional partial cross-sectional view of a grating of the kind according to the invention.

<Description of the code | symbol about the principal part of drawing>

4: incineration grating

5: blowing chamber

9: fixed bar

9A, 10A: Orifice

10: moving bar

11: side plate

11A: hollow or recessed

The invention will be described in detail below with reference to the drawings showing one preferred embodiment of the invention.

1 shows the arrangement of an incineration grating according to the invention in a plant for incineration of waste.

The waste is thrown into the hopper 1 and falls into the lower space 2, and the waste is received on the horizontal plane at the bottom of the lower space and is pushed onto the inclined incineration grating 4 by the pressing member 3.

Below the grid 4 formed by the transverse bar provided with the orifice is a blowing chamber 5 through which combustion air is blown, which burns the waste pile on the grid 4 as it passes through the orifice. On the grid 4, smoke is discharged from the pipe 8 to the smoke treatment device.

The bars of the grid 4 are alternating with fixed and moving bars as described in detail below, which bars gradually move the combusted waste pile toward the discharge down space 6 and discharge In the lower space, the garbage falls into the cooling tank 7 and is recovered.

2 shows the incineration grating 4 in more detail. The incineration grating 4 comprises a row of fixed bars 9 and a moving bar 10 translating on the fixed bar, wherein the fixed bar and the moving bar are interposed between each other, and the fixed bar and the moving bar have blown air. Passing orifices 9A and 10A are provided.

A structure 13 for supporting the stationary bar 9 and a structure 14 for translating the movable bar 10 are shown schematically in FIG. 2, which structures are fixed vertical support for the stationary bar and moveable. It consists of a moving beam for the bar.

The row of bars is laterally bounded by a vertical side plate 11 consisting of a plurality of panels arranged in parallel and fastened together. In general, the grating comprises side plates 11 of this kind on each side.

As can be seen in FIG. 3, the side plate 11 is formed with a series of hollows or recesses 11A into which the lateral edges of the respective fixing bars 9 are fitted. More specifically, each recess 11A has a vertical flat bottom extending to the bottom edge 11B of the side plate 11 and an upper edge 11C having the same shape as the side shape of the corresponding fixing bar 9. It is in the form of a half-chucking groove having.

Each fixing bar 9 is fitted in a recess 11A in the form of a half-ditch groove as can be seen in FIG. There is a minimum gap between the side plates 11 supported by the support structure 12 and the fixed bar 9 to allow differential expansion.

This gap constitutes a zigzag leakage passage for blowing air in the blowing chamber 5 below the bars 9 and 10. These zigzag passages reduce leakage flow rate and cause horizontal air flow at the outlet of the passage, i.e., air penetration into the waste pile, which contributes to the combustion of the waste and ultimately prevents fine solid particles from falling through the passage. Fine solid particles block the leakage passages instead.

Claims (3)

A fixed bar (9) row and a moving bar (10) translating on the fixed bar, the fixed bar and the moving bar being interposed between each other, the fixed bar and the moving bar having a blowing chamber (5) disposed under the grid; In the grid for household waste incineration, orifices (9A, 10A) through which blowing air is passed through are provided, and the row of fixed bars is bounded laterally by at least one side plate (11). The side plate 11 has at least one recess 11A into which the lateral edge of the fixed bar is fitted to form a zigzag air passage between the lateral edge of the fixed bar and the side plate. Incineration grid. The grid according to claim 1, which is laterally bounded by two vertical side plates (11), each side plate having a series of recesses (11A) each receiving a lateral edge of the fixing bar (9). A grid for household waste incineration. The top edge according to claim 1 or 2, wherein each recess 11A has a vertical flat bottom extending to the bottom edge 11B of the side plate and an upper edge having the same shape as the side shape of the corresponding fastening bar 9. A grid for household waste incineration, characterized in that it is in the form of a half-tight groove with 11C.

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