WO2018149516A1 - Feed grate with grate track separation elements - Google Patents

Abstract

The invention relates to a feed grate of a grate furnace, comprising grate tracks which are made of individual grate rods (7, 8) that are arranged in multiple longitudinal and transverse rows in a stepped manner and which are inclined. A central beam (13) which is made of a plurality of individual grate track separation elements (4) arranged in a row in a stationary manner is formed between two grate tracks, and a respective first stationary grate rod (7) and a paired second grate rod (8) which can be moved in a feeding direction are arranged multiple times in each of the grate track (2) rod rows (5) adjacent to the grate track separation elements (4) in the longitudinal direction (L). Each of the grate track separation elements (4) is formed as a cast part with tubular lines through which water can flow and which are formed in cast part walls during the casting process of the cast part. A readily castable grate track separation element is to be provided with an improved adaptation to the grate rod geometry of the feed grate. This is achieved in that at least some of the plurality of grate track separation elements (4) have a flat support surface (15) on the upper face, an upright end surface (16) on the front face in the feed direction of the feed grate (1), and a front support surface (17) and, at a distance therefrom, a rear grate rod support receiving area (18), which is designed in the form of a recess, on the lower face.

Description

 Feed grate with grate separation elements

The invention is directed to a stationary arrangement between two grate webs of a stepped formed from individual, arranged in rows grate bars, inclined feed grate a grate firing, especially for grate firing, wherein in the installed state of the grate separation element in a grate of the feed grate in each adjacent to the grate web separation element in the longitudinal direction Grate bar row of the two grate webs adjacent to each grate track separating element respectively a first stationary mounted grate bar and on an upper side of the first grate bar superimposed an associated second grate bar, which is mounted on the wing side of the first grate bar slidably mounted along sliding are arranged, and wherein the grate separation element as a casting with at his casting formed in Gussteilwandungen tubular water-flowable lines is formed.

Furthermore, the invention is directed to a feed grate of a grate firing, in particular for grate firing, with stepwise formed of individual, arranged in several longitudinal and transverse rows of grate bars and inclined aligned grate tracks, wherein between two more longitudinal and transverse rows of grate bars comprehensive rust paths one of a variety formed on each, the stationary juxtaposed arranged web separation elements formed middle beam and in each of the Rostbahntrennungselementen in the longitudinal direction adjacent rows of grate rails of the two grate paths several times a first stationarily mounted grate bar and an associated second grate bar advancing movably mounted on a top side of the first grate bar resting on This wing side Vorschubbewegllch is slidably mounted along, are arranged, and wherein the grate web separation elements each as a casting with in his casting in G Be formed part walls formed tubular water-flow lines.

Feed grates are in particular part of the grate firing of grate firing systems. A feed grate is one Usually consisting of several grate tracks, inclined combustion grate of a grate firing system, on which abandoned at one end to be burned garbage and transported to the other end of the combustion grate. On the way from the end of the task to the end of the discharge, the garbage is burned. Each grate web consists of alternately each a transverse row (transverse row) forming stationary arranged first grate bars and relative to these advancing movable on these along sliding sliding second grate bars. In this case, the grate bars, which are movable in advance, are all arranged in such a way that they are moved uniformly on the row of first grate bars arranged below them. In this respect, moves each transverse row of advance movably mounted second grate bars uniformly. On the other hand, the grate bars are all formed with the same width, so that uniform longitudinal rows form in the longitudinal direction of a grate over its length, in each of which a fixedly mounted first grate bar and a second grate bar movably mounted one behind the other are arranged alternately. By means of a uniform forward and backward movement of the individual, formed from feed movably mounted second grate bars rows of garbage is transported from the task side to the opposite side of the feed grate. The design of the feed grate to a combustion grate is achieved, inter alia, that the individual grate bars in at least one of its outer surfaces have an outlet slot for the grate bars from the bottom flowing combustion air. After an initial ignition of the refuse, the combustion air flowing in from below ensures permanent combustion of waste located on the respective grate tracks.

Even if such feed grids are preferably used in waste incineration, it is also possible for biomass or so-called substitute fuel, such as plastic waste, for example, or mixtures thereof to be incinerated from said fuels.

Since the grate webs expand due to the heat generated during the combustion heat, but at a shutdown of the feed grate of the grate firing but also contract again, are the individual Rostbahnen arranged so that can expand at least on one longitudinal side. In the case of two-lane feed gratings or those which have multiple two-lane juxtaposed grate paths, a grate web separation constructed from individual, stationarily arranged grate separation elements is formed centrally between the two grate paths, which is also referred to as a center beam. In order to make these web separation elements sufficiently temperature resistant, it is known to form these as water-cooled castings. In this case, during the casting of the casting in the walls of the element rohrformige, can be traversed by water lines. Such web separation elements are often formed as an arc in the form of an upside down U. Due to the casting technique, which requires that the casting encased in the casting mold as a whole be provided with both a feeder for supplying the melt and a riser for the escape of air or gases and for receiving excess melt, can not be In particular, these U-shaped grate separation element can not be produced in any relative spatial position. This leads to segregations or voids forming in the walls of such grate separation elements. In operation, this leads to the fact that the existing Lunkerstellen obstruct the heat dissipation from the outside of such a grate web separation element towards the water-carrying cooling tubes in the interior of the grate separation element in the operation of such use. This leads to localized overheating of the wall material and to a bursting of the wall. Such grate separation elements therefore have a service life of about a maximum of one year during operation.

There is therefore a need for better pourable, alternatively configured grate web separation elements.

The invention has for its object to provide a solution that makes it possible to provide a well pourable grate separation element with improved adaptation to the grate bar geometry of the feed grate. This object is achieved by a grate web separation element having the features according to claim 1 and a feed grate having the features according to claim 17. Advantageous embodiments and expedient developments are the subject of the respective subclaims.

In a grate separation element of the type described in more detail, this object is achieved in that the grate separation element on the upper side a flat support surface and front side in the thrust direction of the feed grate an upright face and underside a front bearing surface and spaced apart has a formed in the form of a recess rear grate bar support receptacle.

Likewise, the above object is achieved in a feed grate of the type described in more detail that at least a portion, preferably the entirety, the plurality of grate separation elements on the top side a flat support surface and front side in the thrust direction of the feed grate an upright end face and underside a front support surface and spaced thereto underside has a trained in the form of a recess rear grate bar support ..

The fact that the grate web separation element according to the invention is adapted in its geometric design to the shape of the grate bars of step-shaped feed grates or combustion grates, results in an improved insertion of the grate separation element in the grate formed by the grate bars of two adjacent grate web grate geometry of the feed grate.

Due to the top planar support surface and provided in the inventive design strength or height of the grate separation element this is not the garbage movement or movement of the biomass or the substitute fuel or mixtures of these fuels between two grate tracks more separating obstacle. This can also its lifetime thereby still be positively influenced that in the operation of the feed grate on this flat wing garbage or In general, the above-mentioned fuel can be deposited, the combustion of which is not fanned by directly emerging from the grate separation element air, since the grate separation element is formed without air outlet slots. In this respect, the garbage / fuel in this case of operation forms a surface protecting the surface of the grate separation element from excessive heat. Furthermore, due to the inventive design of the

Rostbahntrennungselementes a good castability of this component, so that it can be produced well with a molten steel even with applied or formed tubular conduits in its wall region, in particular in which the lines having Rostbahnboden as a casting.

Finally, the grate web separation element according to the invention is thereby particularly well suited for use in conventional feed grates or combustion grates, in particular grate firing systems, that it has a front support surface and spaced from the underside a formed in the form of a recess rear grate bar support receptacle underside. With the front bearing surface, a grate separation element can be placed on the upper side planar support surface of a immediately before arranged further grate separation element, thereby resulting in the step-like design of the feed grate analogous to the arrangement of the grate bars. The formation of the Roststabträgeraufnahme makes it possible to set up and store the grate web separation element on conventional, existing in the grate tracks of the feed grate grid bar. In particular, round rods can advantageously be used here. The further geometric configuration that the grate web separating element has the same height as two superimposed grate bars and the length of the top-side planar support surface corresponds to the length of the travel path of a sliding grate bar, gives the grate web separation element an overall compact design which is of a size such that a grate web separation element as a single component can be handled and handled as a single interchangeable component. In an analogous manner, the feed grate according to the invention has the same advantages.

To achieve a compact design of the grate separation element, it is particularly advantageous if the height of the grate separation element is at least equal to the height, which in each superimposed stationary stored first and associated movably mounted second grate bar in its installed state in a grate of the feed grate from the bottom of the Support surface of the first grate bar extends to the top of the support surface of the second grate bar, which provides the invention in development.

In an embodiment of the vertical extent of the grate web separation element according to the invention, it is particularly advantageous if the height extending from the underside of the support surface of the grate web separation element to the upper side of the support surface of the grate separation element height is equal to the added individual heights of the first and second grate bar. It is particularly advantageous if the level of the upper-side planar support surface of the grate separation element is equal to or at least substantially equal to the level of the upper side of the wing side of a second grate bar adjacent to the grate separation element, when it is in its installed position in which it is on the upper side Wing side of an associated first grate bar rests. As a result, it is possible for fuel, in particular waste, to be moved or conveyed by the grate webs adjacent to the grate web separation element onto the top-side planar support surface of the grate web separation element. While it is possible that the first and second grate bars have different heights or thicknesses, it is of particular advantage if the first and second grate bars are formed with the same height or in the same thickness. It is thereby possible to equip a feed grate with only one grate bar type, which depending on whether it is arranged and supported on a grate bar carrier which can be moved forward or mounted on a stationary grate bar carrier can become the first grate bar mounted in a stationary manner or the second grate bar mounted in a movable manner. In an embodiment, the invention provides that the upper planar supporting surface of the grate web separating element is the same length as or shorter than the upper side of the wing side of the first and / or the second grate bar.

This refinement makes it possible to arrange a grate-web separation element according to the invention in a feed grate adjacent to a grate bar mounted without being moved forward without the storage of the second grate bar being moved on a grate bar carrier being adversely affected by the length of the grate-web separation element.

In a particularly advantageous manner, the grate web separation element according to the invention is then adapted to the geometry of the front of the surrounding grate bars when the upstanding end edge of the grate separation element has a height which, preferably at least substantially equal to the height of the front upright end edge of the first or second grate bar ,

A grate separation element is then particularly advantageous as a replaceable component particularly advantageous in the design and structural design of adjacent to him arranged in a feed grate rust paths and longitudinal and transverse rows of grate bars, when extending from the edge lower edge of the upright end face of the grate web separation element to the center a length extending from the lower edge of the upright end face of the first grate bar to the center of a lower rear grate bar support of the first grate bar extending and / or from an edge lower edge of the upstanding end face of the second grate bar to the center of a lower-side rear grate bar support of the second grate bar extending length, which is the invention in further out design. This makes it possible to use existing substructures such as grate bar support on which rest the grate bars or to extend in order to also store each a grate separation element can.

In particular, this results in the possibility that the rear grate bar support of the grate separation element rests on a stationary mounted grate bar, preferably a round bar, whereby the invention is characterized in a particularly advantageous and expedient further embodiment. It is particularly advantageous and expedient here, it continues to be according to further embodiment of the invention, when the rear grate bar support of the grate separation element and the rear Roststa bträg e ra na na e of the first grate bar on the same stationary mounted grate bar, preferably a round bar, rest.

The inventive geometric design and derived therefrom compact design of the grate separation element makes it possible to form this as a single exchangeable component, whereby the invention is also distinguished in development.

Since the grate separation element during operation of the feed grate is exposed as a combustion grate, in particular a waste incineration plant, a high temperature load and also the influence of highly corrosive components, in particular gases that form during waste incineration, it is also advantageous if the grate separation element as from a , in particular high chromium-containing high-grade steel melt cast casting, which the invention further provides.

In order for the grate web separating element to fit well into the geometry of grate webs formed from individual grate bars, it is furthermore advantageous if the width of a grate web separating element is equal to or twice the width of the first and / or second grate bar, which is a further embodiment the invention provides. To be able to cool well in the combustion operation, in particular waste incineration, the grate separation element with water, the invention provides in a further development that the tubular, water-flow lines are formed and arranged in meandering labyrinthine paths running below the top planar support surface in a supporting floor of the grate separation element ,

Furthermore, it is advantageous to bridge the existing between the height of the front end face of the grate separation element and the height of the upper-side planar support height difference by means of an obliquely inclined or curved Verbindungsfiäche. This makes it possible to match the height of the front end edge to the height of corresponding end edges of the grate bars to adjust the height of the grate bar to the added heights of two superimposed grate bars and still achieve a compact design of the grate separation element. In particular, it is thereby possible to form the connecting surface in such a length that, when the respectively movable second grate bar is in its front end position, which then between the upright end face of the stationary mounted first grate bar and the upper airfoil side of it lying level and height difference formed in the grate separating element as skewed or curved surface or plane bridged feed movable second grate bar. The invention therefore provides in an embodiment that the grate web separation elements on the front side has an inclined and / or curved connecting surface between the front of its upper-side planar support surface and its upright end face.

In an advantageous embodiment, the feed grate according to the invention is characterized in that its grate path separating elements are designed in the embodiment and development of the grate path separating element according to the invention. It is therefore further contemplated that the grate web separation elements are formed as a grate web separation element according to one of claims 2-16. Since a grate sheet separating element according to the invention is formed substantially overall in a length corresponding to the length of a grate bar plus the distance corresponding in the front feed position of a thrustable second grate bar between the front end face and the end face of the first grate bar mounted therebelow which rests the second grate bar, the number of in a feed grate according to the invention then, when the grate separation in the form of a central bar consists of only one row behind the other arranged web separation elements, half the size of the arranged in a longitudinal row number of first and second grate bars. The invention therefore also provides, in a further development of the feed grate, that the number of grate path separating elements forming the middle beams is half the size of the feed movable and stationary first and second grate bars arranged in each of the two longitudinal rows adjoining the longitudinal sides of the center beam.

At the same time, however, this means that the number of grate track separating elements is half the number of transverse rows. Therefore, the feed grate according to the invention is also characterized in an embodiment in that the number of grating path separating elements forming the middle beam is half the number of transverse rows of the grate path (s) adjacent to the middle beam. A respect to the arrangement of its Roststabträgerelemente and the surface of the grate webs in particular with respect to the interchangeability of individual grate bars and grate separation elements structurally advantageous designed or framed feed grate arises according to the invention then, when the first and the second grate bar the same from the bottom of the support surface Have the respective grate bar to the top of the support surface of the respective grate bar extending height and the grate web separation element in its from the underside of the support surface of the support surface of the grate separation element to the top side of the support Supporting surface of the grate separation element extending height twice as high as the first or the second grate bar is formed.

In order to form a center beam as a grate separation between two grate tracks with interchangeable grate separation elements, it is expedient if each grate separation element is formed as a single exchangeable component of the central bar and interchangeable between two grate paths of the feed grate is arranged. Finally, the invention is distinguished by the fact that the feed grate is formed in two lanes with two grate paths separated by a grate path separation designed as a middle beam. In particular, in two-lane or multiple two-lane feed grates, it is possible to provide a stationary or fixed grate separation in the middle between two grate tracks and to arrange the lateral longitudinal expansion permitting storage on each opposite outer sides of the grate paths.

The invention is explained in more detail below by way of example with reference to a drawing. This shows in

Fig. 1 is a schematic perspective view of a feed grate according to the prior art of a grate firing a grate furnace, Fig. 2 in a schematic perspective view as dissolved out

 Group representation of the arrangement of several inventive web separation elements in their relative position to adjacent first and second grate bars in their respective mounting positions in a grate web of a feed grate according to the invention,

Fig. 3 in a schematic perspective view as dissolved out

 Group representation the arrangement of several inventive web separation elements in their relative position to on a

Side adjacent first and second grate bars in their respective installation positions in a grate track of a feed grate according to the invention,

Fig. 4 in a schematic representation as a detached group representation, the arrangement of several inventive

Rostbahntrennungselemente in their relative position to on the opposite to the view of FIG. 3 opposite adjacent side arranged first and second grate bars in their respective mounting positions in a grate of a feed grate invention,

Fig. 5 in a schematic side view as dissolved out

 Group representation of the side view of several inventive web separation elements in their relative position to each other and to adjacent first and second grate bars in their respective

Installation positions in a grate track of a feed grate according to the invention,

Fig. 6 in a schematic side view as dissolved out

 Group representation the side view of several inventive

Grate web separation elements in their relative position to one another and to adjacent first and second grate bars in their respective installation positions in a grate path of a feed grate according to the invention,

Fig. 7 in a schematic side view as. leached

 Group representation of the arrangement of several inventive web separation elements in their relative position to each other and to adjacent first and second grate bars in their respective mounting positions in a grate web of an inventive

Feed grate in a side view of the first and second grate bars in a first relative position to each other, Fig. 8 in a schematic side view as dissolved out

Group representation the arrangement of a plurality of first and second grate bars in their relative position to each other and to adjacent Rostbahntrennungseiementen in their respective mounting positions in a grate of a feed grate invention in a

Side view in a second relative position of the first and second grate bars to each other,

9 is a schematic side and sectional view of the arrangement of several inventive grate separation elements in dissolved group representation in its installed position as grate separation in the form of a central bar in a grate of a feed grate invention, Fig. 10 in perspective view of the underside an inventive

Railroad separation element, ^'

Fig. 1 1 in a schematic side view of the invention

 Rust path separating element according to Fig. 10 and in

12 is a perspective plan view of the meander-like labyrinth-shaped, tubular lines of the inventive web separation element according to FIGS. 10 and 11. With reference to FIGS. 2-8, it should be noted that FIGS. 3-8 depict special views detached from the illustration according to FIG. 2, but in each case the relative positions of grate separation elements and first and second grate bars shown in FIG to each other, as will be explained in more detail below.

Fig. 1 shows a generally designated 1 feed grate a grate firing a grate furnace. The feed grate 1 is formed in two lanes and comprises two grate webs 2, of which only one is shown and the other, identically constructed second grate web in the shown free Rostbahnfeld 2 'is arranged. The two grate webs 2 are in the middle of the feed grate 1 by a stationary trained web separation 3 ', which is composed of individual grate web separation elements 4', centrally and in half separated with respect to the width of the feed grate 1 from each other. The individual grate webs 2 have a multiplicity of longitudinal rows 5 and transverse rows 6. The longitudinal and transverse rows 5, 6 are formed of individually adjacently juxtaposed first grate bars 7 and second grate bars 8. The first grate bars 7 are fixedly mounted grate bars and the second grate bars 8 are grate bars which are mounted so as to be movable in advance and which can slide along on an upper side of the wing 9 of a first grate bar 7 on this upper side of the wing 9 between a front and a rear one End position of their respective front upright end face 10 a travel V are exaggerated. A respective longitudinal row 5 thus consists of a plurality of longitudinally L at least substantially aligned first and second grate bars 7, 8, wherein in each case alternately a stationary mounted first grate bar 7 and resting thereon a slidably mounted along sliding second grate bar 8 again followed by a is now arranged on the upper side Tragfiächenseite 1 1 of the lower side adjacent second grate bar 8, which also first grate bar 7 then again a second grate bar 8 is arranged. This design results from the discharge side A to the task side B of the feed grate 1 through a stepped and inclined rising grate formed surface of each grate 2. The step shape results from each alternating superposed arrangement of a first grate bar 7 and a second grate bar eighth

A respective transverse row 6 is formed from adjacent in the transverse direction Q of the feed grate adjacent grate bars. In this case, each transverse row consists of a respective type of grate bar, ie either exclusively fixedly mounted or mounted first grate bars 7 or second movable movable grate bars 8, so that alternately a fixed transverse row and a movable movable transverse row over the length of the feed grate 1 are formed. By the feed movement, ie the Moving forward to a front end position, then moving back to a rear end position and then advancing again to a front end position of the second movable grate bars 8, the transport of the refuse to be incinerated on the advancing grate 1 from the feed side B to the discharge side A is effected. The combustion air required for the combustion of the refuse flows to the plurality of first and second grate bars 7, 8 on the underside and exits through the upper side in the upper-side wing sides 9, 10 formed air outlet slots 12 as combustion air.

The feed grate 1 described above and shown in FIG. 1 differs from the feed grate according to the invention only in that the grate web separation 3 'designed as center beam 13 is formed from grate web separation elements 4' according to the prior art. These stationary arranged and stored grate separation elements 4 'are formed in a known manner in the form of an upside-down U as a casting with formed in his casting in Gussteilwandungen tubular water-flowable lines and protrude, as shown in FIG. 1 can be seen on the through the first and second grate bars 7, 8 formed Rostbahnfläche addition. Only this grate web separation 3 'is replaced in a feed grate 1 according to the invention by a grate web separation 3 formed from grate web separation elements 4 according to the invention. All other elements correspond to the elements and components described above and shown in FIG. 1. The expansion possibility of the individual transverse rows 6 in the transverse direction Q is not ensured by the central grate web separation 3, 3 ', but by not shown bearings on the opposite longitudinal sides of the feed grate 1.

A grate web separation 3 of a feed grate 1 according to the invention formed from grate web separation elements 4 according to the invention is explained in more detail below with reference to FIGS. 2-9.

FIG. 2 shows, in the form of a group of grate web separation elements 4 detached from a grate web 2 and first and adjacent thereto second grate bars 7, 8 their relative position and mounting position to each other in their respective installation positions in a grate web 2 of a feed grate. 1 In this respect, it is a representation of a group of first and second grate bars 7, 8 and grate path separating elements 4 cut out of the grate path 2 in its installed state in the grate track 2 of a feed grate 1.

Overall, two grate separation elements 4 can be seen in FIG. 2, which are each assigned a pair of stationary first grate bars 7 and second grate bars 8 movably mounted on each side. Here, on the left in Fig. 2 side, the feed movable second grate bars 8 are all shown in their rear end position of their front upstanding end face 10, whereas in Fig. 2 on the opposite, right side arranged second grate bars 8 on this page in its front end position of its front upright end face 10 are shown, wherein the respective rear and front end position Define the V travel, the each advancing movable second grate bar 8 in the course of its advancing movement from its rear end position to its front end position and back to its rear Exhausted final position.

As can be seen, for example, from FIG. 4, the rows of first and second grate bars 7, 8 shown in FIG. 2 to the right of the grate web separation elements 4 together with the grate web separation elements 4 mil view of the left in Fig. 2 side of the grate separation elements 4 at on each of these left side remote first and second grate bars 7, 8, each grate web separation element 4 on the upper side a flat support surface 15 and front side in the thrust direction of the feed grate 1 an upstanding end face 16. On the underside, each grate separation element 4 has a front support surface 17 adjoining the front side upright end surface 16 and, spaced therefrom, has a rear grate bar support receptacle 18 formed in the form of a recess. With its underside front support surface 17, each grate web separation element 4 rests on the flat support surface 15 of the next grate web separation element 4 adjacent to it in the longitudinal direction L to the front. The upper-side planar support surface 15 has a Length L1 up. This length L1 is at least equal to the length L2, the second grate bar 8 on the upper side of the wing surface 9 of the front longitudinally L adjacent to him first grate bar 7 in its advancing movement between the front and rear end position of its front upright end face 10 as a path V Butters. These lengths and length ratios are shown in particular in FIG. 2. The total length L4 of a grate separation element 4 is at least as long as that of the front end edge of a stationary first grate bar 7 extends to the rear end position of the front upright end face 10 of the second grate bar 8 movably mounted on the wing side 9 of this first grate bar 7. Preferably, the total length L4 is formed 10 to 20% longer than the length L3, in the rear end position of a respective upright end face 10 of a second grate bar 8 movably mounted, still a sufficient lateral contact surface with the adjacent grate separation element 4 and a sufficient overlap remaining in this position from the upper-side wing side 1 of a second grate bar 8 with the upper-side planar support surface 15 of the adjoining grate web separating element 4 form. These length ratios from L4 to L3 can be seen in particular from FIG. 3, which in an analogous manner to the illustration according to FIG. 4 shows the grate web separating elements 4 shown in FIGS. 2 and 4 from the left side in FIG. 2 in a perspective view with the arranged in Fig. 2 on the left side before rows of first and second grate bars 7, 8 shows. Here, the length L1 of the upper-side planar support surface 15 of each grate separation element 4 may be the same length or depending on the length L2 of the respective trained travel V shorter than the upper side of the wing side 1 of a second movable grate bar 8 mounted movably. Since advantageously the first and second grate bars 7, 8 are of geometrically identical design, so that any of these grate bar elements can be used both as a stationary mounted first grate bar 7 and as an advanceably mounted second grate bar 8, both have the Grate bars 8 and the grate bars 7 a length L5 of their respective upper side wing sides 9, 1 1.

Between the front side of its upper-side planar support surface 15 and its upright front end surface 16, each grate separation element 4 has a front surface 20 which connects these two surfaces and is inclined and / or curved.

Fig. 5 shows a side view of the group of grate separation elements 4 in the arrangement with first and second grate bar elements 7, 8 as shown in Fig. 4 in a perspective view, ie with their respective front end position of their advancing second grate bars 8. Fig. 6 shows the opposite view of the respective opposite side surface of the grate separation elements 4 in the arrangement, as shown in Fig. 3, ie with each located in its rear feed position of its advancing second grate bars 8. In an analogous manner FIGS. 7 and 8 show side views of the opposite sides of the arrangements shown in FIGS. 5 and 6, respectively. Thus, Fig. 7 shows a side view of the Fig. 5 opposite side of the grate separation elements 4, so that a top view of this (in Fig. 2 right side) arranged first and second grate bars 7, 8 results. In an analogous representation, FIG. 8 shows the side of the grate web separation elements 4 opposite the illustration according to FIG. 6, so that a top view results on the first and second grate bars 7, 8 located on the left side of the grate web separation elements in FIG. 2 , As already mentioned and can be determined by comparing FIGS. 5-8 with FIGS. 2-4, FIGS. 5 and 7 show the second grate bar 8 movably mounted in each case in its front end position of its advancing movement and show FIGS. 6 and 8 the second grate bar 8, which is movably mounted in advance, in each case in its rear end position of the advancing movement. In addition, the position of two second grate bars 8 in their rear end position of the advancing movement is shown in two places in FIG. 7, which is indicated by the reference numeral 8 '. This merely serves to clarify the travel path V, which a second grate bar 8 also performs identically on its rear side.

9 shows a side view of two superimposed web separation elements 4 of an inventively constructed grate separation 3, which is arranged as a central beam 13 fixed on a support structure 21 of a grate 2. To illustrate the outer contours, the right in Fig. 9, in the feed grate 1 front grate separation element 4 is drawn in a dotted line representation, so that the adjoining adjoining first grate bars 7 and second grate bars 8 clearly stand out. The representation of FIG. 9 corresponds to the illustrations of FIGS. 4, 5 and 7, in which the respectively movable second grate bar 8 is in its front end position of its advancing movement. Of Fig. 9 it can be seen that the height H4 of each grate separation element 4 is equal to the total height, which in each superimposed stationary stored first grate bar 7 and associated feed movable resting thereon mounted second grate bar 8 in its installed state in a grate 2 of the feed grate 1 extends from the underside 22 of the support surface 23 of a first grate bar 7 (see also FIGS. 7 and 8) to the upper-side airfoil side 1 of the second grate bar 8. The height H4 shown in the figures represents the height that the grate web separation element 4 has at least. It may be a little larger, but is always at least substantially the same height, such as the added individual heights H7 of the first grate bar 7 and H8 of the second grate bar 8. The term "substantially equal" includes deviations upwards in a size of maximum The individual heights H7 and H8 each extend from a lower-side support surface of a grate bar to its upper-side airfoil side, ie the first grate bar 7 from its underside 22 of the support 23 to the upper side Tragfiächenseite 9, which height is designated as height H7, and the second grate bar from the bottom 24 of the support 25th to the upper side wing side 1 1, which is referred to in the figures as height.

In the illustrated embodiment, thus, the total height H4 of a grate separation element 4 results from the addition of the individual heights of the grate bars 7, 8, ie the height H7 of the first grate bar 7 and the height H8 of the second grate bar 8. The from the underside of the support side 26 of the front support surface 17 height of the grate separation element 4 up to the top side 26 of the support surface 15 of the grate separation element 4 extending height H4 is equal to the added individual heights H7, H8 of the first and second grate bar 7, 8 in the embodiment.

Similarly, the heights of the front-side upright end face 16 of the grate separation element 4 and the front-side upright end face 14 of the first grate bar 7 and the front-side upright end face 10 of the second grate bar 8 are formed with an identical height extent or height. At least these heights are in turn essentially the same, which means that the heights differ by a maximum of 10%, preferably by 5%, in their longitudinal extent.

In order to be able to arrange both the grate web separation element 4 and the first grate bars 7 and second grate bars 8 flexibly on uniformly shaped and arranged grate bar carriers 28, 29, wherein the grate bar carriers 28 are movable in advance and the grate bar supports 29 are mounted stationary, both the first grate bar 7 are characterized as Also, the second grate bar 8 and the grate separation element 4 characterized by the fact that they all have a same length L6, extending from a respective edge lower edge 30.1, 30.2 or 30.3 of the respective upright end face 10, 14, 16 to a from the vertical precipitation results in the plane of the respective underside of the front support surfaces 17, 22 and 25, which is precipitated from the center of an incircuit 33 which can be formed in the respective rear grate bar support 18, 31 or 32. For the grate web separation element 4 according to the invention, this length L6 is shown in FIG. 11. The length L6 extends from the edge-side lower edge 30.3 of the upright end face 16 of the Rostbahntrennungselementes 4 to one from the center of the lower-side rear grate bar support 18 of the

Grate web separation element 4 filling incircuit 33 precipitated solder 34 extends. In an analogous manner, identical lengths L6 each extend from an edge-side lower edge 30.1, 30.2 of the upright end faces 14 and 10 of the first grate bar 7 and second grate bar 8 to the solder dropped from the center of an inscribed circle arranged in a respective grate bar holder 31, 32. As can be seen from FIGS. 2-9, the grate web separation element 4 is dimensioned such that a first and a second grate bar 7, 8 do not project beyond the top-side planar support surface 15 of the grate web separation element 4 in their respective superimposition. Likewise, it can be seen from these figures that the front ends of the first and second grate bars 7, 8 which comprise the respective upright end faces 10, 14 are not in front of the connecting surface 20 of the gripper bar when the second grate bar 8 is in its front end position during its advancing movement Rostbahntrennungselementes 4 protrude. The length L4 of the grate separation element 4 is at least as long as the plane extending from the front upright end face 14 of a first grate bar 7 level to the rear end 35 of the upper side wing side 1 1 of a resting on the first grate bar 7 second grate bar 8, if this is in its front end position of its advancing movement, extending length L7. At most, the length L4 of the grate separation element 4 is as long as the plane defined by the front upright end face 14 of a first grate bar 7 to the rear end of the second grate bar 8 resting on the first grate bar 7 when in its forward end position its advancing movement, extending length L10. Preferably, the length L4 is the same length as the length L7, as is also the case in the embodiment. In particular, the grate web separation element 4 is formed in such an overall length L4, which is at least, preferably approximately, in particular exactly equal to that resulting from the addition of a rear end 35 of the upper side of the wing side 1 1 of a second grate bar 8 mounted to be moved forward to the plane defined by its front upright face 10 plus a plane defined by the front upright end face 10 of the second grate bar 8 to that of FIG the front upright end face 14 of an adjacent below the second grate bar 8 lying first grate bar 7 spanned plane extending length 9 resulting total length. These relationships can be seen in particular from FIGS. 4 and 7, from which it is once again clear that these size relationships relate to the installed state and the installation positions of grate web separation element 4, and respective first and second grate bars 7, 8 in the feed grate 1 with respect to the heights and lengths ,

The width B4 of the grate separation element 4 is equal in the embodiment both the width B7 of the first grate bars 7 and the width B8 of the second grate bars 8. However, dimensions can also be selected in which the width B4 of the grate separation element 4 is a multiple of the width B7 of a first grate bar 7 or the width B8 of a second grate bar 8 corresponds, in which case the width B4 is preferably twice as large as the width B7 or the width B8.

The rear grate bar support receptacle 18 is in the installed state of the grate separation element 4 in the feed grate 1 on a stationary mounted grate bar 36 which, as is apparent from Fig. 1 1, the diameter of the inscribed circle 33. Preferably, the grate bar carrier 36 is the stationary mounted grate bar carrier 29, on which the first grate bar 7 is mounted stationary. In this respect, the rear grate bar support receptacle 18 of the grate separation element 7 and the rear grate bar support receptacle 31 of the first grate bar 7 are on the same stationary mounted grate bar support 29, 36. All grate bars 28, 29 and 36 are formed as a round bar. The grate sheet separating element 4 shown in a perspective view as viewed from below in FIG. 10 is formed as a single exchangeable component. It is cast as a casting 37 in a practical casting process from a molten steel. The molten steel is preferably a chromium-containing molten steel with the material number 1.4823 or 1.4740. In particular, the grate web separation element 4 is made of a stainless steel melt having between 25 and 28 wt .-% chromium at 0.3 to 0.5 wt .-% carbon and a weight fraction of 3 to 6% nickel. During the casting process, for example by means of inserted tubes, the pipes 38 shown in FIG. 12 are cast in meandering labyrinth-like paths into a wall region of the grate separation element 4 forming the support bottom 39 of the grate separation element 4. Here, the tubular water-permeable lines extend below the top-side planar support surface 15, below the top of the connection surface 20 and below the front upright end face 16, as can be seen by the dashed lines in Fig. 1 1. From the support bottom 39 protrude the two connection pipes 40, 41 out, which can be connected to water-bearing lines. Thus, the grate web separation element 4 is formed as a so-called water-cooled grate web separation element.

Although the invention is explained in more detail above by way of example with reference to a feed grate of a grate firing of a waste incineration plant, it is nevertheless to be applied to any type of grate firing, combustion grate or advancing grate which has stepwise stacked grate bars lying in rows or in layers relative to each other, in particular slidably superimposed, on which a fuel or a substrate to be burned is moved from an input or feed side of the feed grate to an output or discharge side of the feed grate. In addition to refuse, fuel can also be any type of substitute fuel or secondary fuel obtained in particular from waste, but also biomass and any combustible mixture of the stated fuels. The invention can also be used in feed grates for calcination or roasting or burning treatment of substances such as iron or processed minerals such as cement, ore, coal or chemical substances are used.

Claims

claims 1. grate separation element (4) for stationary arrangement between two grate webs (2) of a stepped from individual, arranged in rows grate bars (7, 8), inclined feed grate (1) a grate firing, in particular for grate firing, wherein in the installed state of the grate web separation element (4 ) in a grate track (2) of the feed grate (1) in each of the grate web separation element (4) in the longitudinal direction (L) adjacent grate bar row (5) of the two grate webs (2) adjacent to each grate web separation element (4) in each case a first stationarily mounted grate bar ( 7) and on an upper side of the wing side (9) of the first grate bar (7) an associated second grate bar (8), which is mounted on the upper side of the wing (9) of the first grate bar (7) movable along sliding, are arranged, and wherein the grate web separation element (4) as a casting (37) formed with its casting in Gußteilwandungen tubular water by formed Roman lines (38) is characterized  that the grate web separation element (4) has an upright end face (16) on the upper side and an upright end face (16) on the front side in the thrust direction of the feed grate (1) and a front support surface (17) on the underside and spaced from the underside a rear grate bar mount (18) formed in the form of a recess ) having. 2, grate separation element (4) according to claim 1, characterized in that it front side has an inclined and / or curved and the front of its upper-side planar support surface (15) with its upstanding end face (16) connecting the connecting surface (20). 3 «grate separation element (4) according to claim 1 or 2, characterized in that the length (L1) of the upper planar support surface (15) of the grate separation element (4) is at least equal to the length (L2), the second grate bar (8) the upper side of the wing (9) of SHEET INCLUDED BY REFERENCE (RULE 20.6) first grate bar (7) resting on its advancing movement between a front and a rear end position of its front upright end face (10) as a travel path (V) sweeps. Grate separation element (4) according to one of the preceding claims, characterized in that the grate web separation element (4) is dimensioned such that a first and a second grate bar (7, 8) in their respective superposition of the top side planar support surface (15) of the grate web separation element (4 ) do not exceed. Grate separation element (4) according to one of claims 2-4, characterized in that the respective upstanding end faces (10, 14) comprising front sides of the first and second grate bar (7, 8) when the second grate bar (8) at its Feed movement is in its front end position, do not protrude beyond the front side connecting surface (20) of the grate web separation element (4). Grate separation element (4) according to one of the preceding claims, characterized in that the length (L4) of the grate separation element (4) at least as long as the plane defined by the front of a standing upright end face (14) of the first grate bar (7) plane to the rear end (35) of the upper-side wing side (1 1) of the second grate bar (8) resting on the first grate bar (7), when this is in its front end position of its advancing movement, is the extending length (L7). Grate separation element (4) according to one of claims 1-5, characterized in that the length (L4 ^" ) of the grate separation element (4) is maximally as long as that of the front upstanding end face (14) of the first grate bar (7). spanned level to the rear end of the first grate bar (7) resting SHEET INCLUDED BY REFERENCE (RULE 20.6) second grate bar (8) when it is in its front end position of its advancing movement, extending length (L10). Grate separation element (4) according to one of the preceding claims, characterized in that the height (H4) of the grate separation element (4) is at least equal to the total height, which in each superimposed stationary stored first and associated thrustably mounted second grate bar (7, 8) in their installation state in a grate track (2) of the feed grate (1) from the bottom (22) of the support surface (23) of the first grate bar (7) to the top side of the wing (1 1) of the second grate bar (8). Grate separation element (4) according to one of the preceding claims, characterized in that the from the underside support side (26) of the support surface (17) of the Rostbahntrennungseiements (4) to the upper side support (27) of the support surface (15) of the Rostbahntrennungseiements (4) extending height (H4) is equal to the added individual heights (H7, H8) of the first and second grate bars (7, 8). Grate separation element (4) according to one of the preceding claims, characterized in that the upper-side planar support surface (15) of the Rostbahntrennungseiements (4) is equal to or shorter than the upper-side wing side (9, 1 1) of the first and / or the second grate bar (4) ( 7, 8) is formed. A grate separation element (4) according to any one of the preceding claims, characterized in that the upright end face (16) of the grate separation element (4) has a height (H16) which is at least substantially equal to the height (H10, H14) of the front upright End face (10, 14) of the first and / or second grate bar (7, 8). SHEET INCLUDED BY REFERENCE (RULE 20.6) Grate separation element (4) according to one of the preceding claims, characterized in that extending from the edge lower edge (30.3) of the upright end face (16) of the grate separation element (4) to from the center of a lower side rear grate bar support (18) of the grate separation element ( 4) filling in incircle (33) felled Lots (34) extending length (L6) equal to the edge of a lower edge (30.1) of the upright end face (14) of the first grate bar (7) to from the center of a lower-side rear grate bar support ( 31) of the first grate bar (7) filling Inkreis precipitated Lots extending length (L1 1) and / or equal to the edge of a lower edge (30.2) of the upright end face (10) of the second grate bar (8) to from the center of a Lower back grate bar support (32) of the second grate bar (8) filling the incircle soldered lot extending length (L12) is. Grate web separation element (4) according to one of the preceding claims, characterized in that the grate web separation element (4) is designed as a single exchangeable component. Grate web separating element (4) according to one of the preceding claims, characterized in that it is produced as a cast part (37) cast from a, in particular high-chromium, stainless steel melt. Rail separation element (4) according to any one of the preceding claims, characterized in that its width (B4) is equal to or twice as large as the width (B7, B8) of the first and / or the second grate bar (7, 8). Grate separation element (4) according to one of the preceding claims, characterized in that the tubular water-flowable lines (38) in a meandering labyrinth-shaped SHEET INCLUDED BY REFERENCE (RULE 20.6) nested tracks below the upper-side planar support surface (15) in a support bottom (39) of the grate web separation element (4) are formed and arranged. Feed grate (1) of a grate firing, in particular for grate firing, with stepped from individual, in several longitudinal and transverse rows (5, 6) arranged grate bars (7, 8) formed and inclined aligned grate tracks (2), wherein between two more longitudinal and Transverse rows (5, 6) of grate bars (7, 8) comprising grate webs (2) formed from a plurality of individual, stationary juxtaposed web separation elements (4) formed middle beam (13) and in each of the grate web separation elements (4) in Longitudinally (L) adjacent rows of grate bars (5) of the two grate tracks (2) several times a first stationarily mounted grate bar (7) and an associated second grate bar (8) movably mounted on a top side (9) of the first grate bar (7) lying on this wing side (9) is slidably mounted along sliding, are arranged, and wherein the grate web separation elements (4) each a ls a casting (37) formed with its casting in Gießteilwandungen tubular water-flowable lines (38) are formed, characterized in that at least a part, preferably the entirety of the plurality of grate separation elements (4) on the upper side a flat support surface (15) and the front side In the thrust direction of the feed grate (1) has an upstanding end face (16) and underside a front support surface (17) and spaced therefrom on the underside a formed in the form of a recess rear Roststa bträg e ra uf na hme (18). Feed grate () according to claim 17, characterized in that the grate web separation elements (4) as a grate web separation element (4) according to one of claims 2-16 are formed. SHEET INCLUDED BY REFERENCE (RULE 20.6) Feed grate (1) according to claim 17 or 18, characterized in that the number of the central beams (13) forming the web separation elements (4) is half as large as the sum of in each of the two on the opposite longitudinal sides (42, 43) of the central bar (13) adjacent longitudinal rows (5) arranged feed movable and stationary first and second grate bars (7, 8). Feed grate (1) according to any one of claims 17 to 19, characterized in that the number of the central beam (13) forming the web separation elements (4) half the size of the number of stationary first and advancing movable second grate bars (7, 8) formed transverse rows (6) is the grate track (s) (2) adjacent to the middle beam (13). Feed grate (1) according to one of claims 17 to 20, characterized in that the first and the second grate bar (7, 8) the same from the underside (22, 24) of the support surface (23, 25) of the respective grate bar (7 , 8) to the top side of the wing (9, 1 1) of the respective grate bar (7, 8) extending height (H7, H8) and the grate separation element (4) in its from the underside of the support side (26) of the support surface (17) of the grate web separation element (4) to the top side (27) of the support surface (15) of the grate separation element (4) extending height (H4) is twice as high as the first or the second grate bar (7, 8) is formed. Feed grate (1) according to one of claims 17 to 21, characterized in that each grate web separation element (4) is formed as a single exchangeable component of the central bar (13) and interchangeable between two grate tracks (2) of the feed grate (1) is arranged. SHEET INCLUDED BY REFERENCE (RULE 20.6) Feed grate (1) according to one of claims 17 to 22, characterized in that it is two-lane with two by a center bar (13) formed as a grate web separation (3) separate grate webs (2) is formed. Feed grate (1) according to one of claims 17 to 23, characterized in that the rear grate bar carrier receptacle (18) of the grate web separation element (4) rests on a stationarily mounted grate bar carrier (36), preferably a round bar. Feed grate (1) according to one of claims 17 to 24, characterized in that the rear grate bar support (18) of the grate separation element (4) and the rear grate bar support (31) of the first grate bar (7) on the same stationary mounted grate bar carrier (29, 36) , preferably a round rod, rest. SHEET INCLUDED BY REFERENCE (RULE 20.6)