EP3499122A1 - Grate bar with contoured tread, grate bar assembly and grate - Google Patents

Abstract

The invention relates to a grate stone (1) for a grate of an incineration plant comprising grate stone layers (15, 16) arranged one above the other, comprising a front foot section (2) and an upper running surface (4) for the front foot section (2) of a grate stone (1 ) a higher-placed rust stone layer (15), the tread (4) being contoured (5) with a raised portion (7) and / or recess (9) for deflecting the rust stone (1) of the higher-placed rust stone layer (15 ) during the feed movement of the grate stone layers (15, 16) of the feed grate. The invention further relates to a layer (15, 16) made of rust stones (1) and a moving grate with rust stones (1).

Description

FIELD OF THE INVENTION

The invention relates to a grate brick for a stacking grate layers comprising a feed grate of a combustion plant, a grate stone layer and a feed grate according to the preamble of claims 1, 9 and 10, respectively.

BACKGROUND OF THE INVENTION

Grills are used, for example, to absorb combustibles such as waste in a waste incineration plant and to transport them through the furnace.

The grates are made up of individual elements, the so-called rust stones. For flat grates, as for example from the DE 20 2013 00974 U1 or DE 20 2011 005342 U1 Applicants are known, the grate stones on a flat focal surface and are adjacent to each other under formation grate layer arranged to provide a transport and / or combustion surface for incineration. Neighboring rust stones can be like from the DE 20 2014 009 257 U1 Applicant known for stability of the grate layer without locking elements such as rods, screws or the like are connected.

In so-called Vorschubrosten or Rückschubrosten (here consistently referred to as feed grate, which also includes a return grate) are several combustion surfaces thus formed stepwise vertically stacked with horizontal Offset are arranged and are moved by a feed mechanism of the feed grate horizontally relative to each other such that fuel supplied from above during the combustion process is pushed over the individual stages, until ideally only the non-combustible residues are discharged down from the feed grate.

During the combustion process, parts of the burning material or combustion residues can get into the spaces between the rusting stones and get stuck there. This can block and break the rust stones.

In addition, parts of the combustible material, combustion residues or other foreign bodies settle in the air gaps required for firing and cooling between the grate stones. This prevents u.a. a predictable combustion control and leads to additional wear or overheating of the grate stones.

Damaged rusting stones must be replaced quickly in order to avoid consequential damage to the feed grate. Therefore, in such a rust stone fractures stop the plant and the affected rust stone must be dismantled after cooling to replace the broken grate stone against a new one. Such downtime is expensive.

SUMMARY OF THE INVENTION

The invention is therefore based on the object, a grate for a superimposed rust stone layers comprehensive feed grate of a combustion system, a grate layer and a feed grate according to the preamble of claim 1, 9 and 10, which increased in simple and cost manufacturability Stability and life of the feed grate allow and contribute to a homogeneous firing.

This object is achieved according to the features of claim 1, 9 and 10, respectively.

Accordingly, a grate stone (used here interchangeably for grate stone, grate bar, grate shoe and the like) for a stacked grate layers comprehensive feed grate of an incinerator, comprising a front foot portion and an upper tread for the front foot portion of a grate stone of a higher arranged grate layer created in which the running surface has a contouring with a bulge and / or depression for deflecting the rust stone of the higher arranged rust stone layer during the advancing movement of the rust stone layers of the feed grate.

As a result, an up-and-down movement of the grating stones is made possible during the feed. The rusting stones are thus also deflected vertically. Combustion residue and combustible material that has entered the interstices between the grate stones is released by the movement and may be returned to the burning surface or fall down onto the grate layer located thereunder.

The contouring can have concavely curved areas and / or convexly curved areas.

Conveniently, only a depression or an embossment is provided. Optionally, multiple recesses and / or embossments may form the contour of a tread.

The embossment and / or depression is advantageously designed arcuate and may front and / or rear side have a flatter and / or steeper rising edge to allow the deflection with the least possible mechanical stress of the grating stones. For this purpose, it may also be provided that the foot section sliding over the contouring in the feed direction and against to provide the feed direction with a corresponding to the embossment, depression and / or rising edge sized Gleitabrundung.

The inventively designed grate stone can now be made thinner in the area of the burning surface with material savings than in the area of the tread, as thanks to deflection typical damage caused by Brenngut- and Brenngutrückstand entry into the grate interstices are avoided.

A side locking device for locking with an adjacent grate stone as shown in DE 20 2014 009 257 U1 be known, said locking device according to the invention allows a vertical and / or Drehauslenkbewegung.

Conveniently, the grating stones in a grate layer and / or in a feed grate with grate stones according to the invention laterally and / or superimposed adjacent to each other with alternating contouring for opposing deflection of adjacent grate stones in the advancing movement. This creates a wave-shaped deflection movement.

It can also be provided to provide only every second, third, n-th, n = 2, 3, 4,..., Rusting stone with a contouring.

An embodiment is advantageous as a turning stone, the both ends at both ends has a receptacle in front of the advancing device of the feed grate and a bulge or convexity and a depression or concavity. In this embodiment, only one type of grate stone is to be provided because it can be installed alternately with one side and the other side as an active tread in order to effect a movement directed against each other.

Further features and embodiments of the invention will become apparent from the following description, the figures and the claims.

DESCRIPTION OF THE FIGURES

• Fig. 1 shows a grate with a projection in perspective view.
• Fig. 2 shows a rust stone with a depression in perspective view.
• Fig. 3 shows two rust-stone layers in perspective view.
• 4 (a), (b), (c) show different tread designs.
• Fig. 5 illustrates a Wenderoststab in longitudinal section.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The in Fig. 1 shown grate stone 1 has a front foot section 2, a firing section 3 for kiln and an upper tread 4 with a contouring 5 for the front foot section 2 of a higher arranged grate stone 1. The firing section 3 here has a smaller material thickness than the tread 4.

The contouring is carried out here in the form of a convenient arcuate embossment 6 with respect to the tread 4 with optional front and rear rising edges 7 and 8. When in Fig. 2 shown grating stone 1, the contouring is carried out with a suitably congruent recess 9.

The foot section 3 has in the feed direction 10 and counter to the feed direction 11 a corresponding to the embossment 6 or recess 9 and rising edge 7, 8 Gleitabrundung 13 on.

A lateral locking device 14, for example in the form of an upwardly open hook, for locking with an adjacent grate stone 1 may be provided, as long as it allows a vertical and / or Dreeschlenkbewegung the grate stone 1.

An in Fig. 3 upper grate layer 15 of a feed grate of an incinerator adjacent preferably has alternately contoured grate stones 1, which are also moved on the foot section 2 on adjacent adjacent preferably alternately contoured grate stones 1 along the feed direction 10 and thereby deflected vertically in opposite directions.

The tread 4 may successively have a bulge / indentation / indentation, see Fig. 4 (a) , with a substantially sinusoidal course. Possibly. If several passages and / or depressions are provided, with or without distance from each other, see Fig. 4 (b) , The embossment 6 and / or recess 9 can also be configured trapezoidal, see Fig. 4 (c) ,

Particularly advantageous is an embodiment as a turning grate stone 1, see Fig. 5 , Here are both ends 17 receptacles provided for engaging in a feed device of the feed grate. Appropriately, the embayment / depression are congruent to each other, the grate designed as a mirror image.

LIST OF REFERENCE NUMBERS

1. 1 rust stone
2. 2 feet
3. 3 feet section
4. 4 tread
5. 5 contouring
6. 6 conquest
7. 7 flank
8. 8 flank
9. 9 deepening
10. 10 feed direction
11. 11 direction
12. 12 Slide rounding
13. 13 Slide rounding
14. 14 hooking element
15. 15 rust stone location
16. 16 rust stone location
17. 17 recording

Claims (11)

A grate (1) for a stacking grate of an incineration plant, comprising a front foot section (2) and an upper track (4) for the front foot section (2) of a grate stone (1) of a higher arranged grate layer (15, 16) Grate layer (15), characterized in that the running surface (4) has a contouring (5) with a raised portion (6) and / or recess (9) for deflecting the grate stone (1) of the higher grate layer (15). during the advancing movement of the grate layers (15, 16) of the feed grate has. Grate according to claim 1, characterized in that the embossment (6) and / or recess (9) is designed arcuate. Grate according to claim 1 or 2, characterized in that the embossment (6) and / or recess (9) front and / or rear side a flatter and / or steeper rising edge (7, 8). Grate stone according to one of claims 1 to 3, characterized in that the foot section (2) in the feed direction (10) and counter to the feed direction (10) corresponding to the embossment (6) or recess (9) or rising edge (7, 8 ) on its tread (4) dimensioned Gleitabrundung (12, 13). Grate according to one of claims 1 to 4, characterized in that the grate (1) in the region of the running surface (4) is made thicker than in the region of a front Brenngutfläche (3) for kiln. Grate according to one of claims 1 to 5, characterized in that it comprises a lateral locking device (14) for locking with an adjacent grate stone. Grate according to claim 6, characterized in that the locking device (14) allows a vertical and / or Dreeschlenkbewegung. Grate according to one of claims 1 to 7, characterized in that it is designed as a turning stone (1). Grate layer (15, 16) for a feed grate of an incinerator, characterized by adjacent alternately contoured grate stones (1) according to one of claims 1 to 8. Feed grate, characterized by grate stones (1) according to one of claims 1 to 9. Feed grate according to claim 10, characterized in that the grate stones (1) are mounted laterally and / or one above the other with alternating contouring (5) for opposing deflection of adjacent grate stones (1) during the advancing movement.

Images