EP2881663A1 - Waste feed device - Google Patents

Abstract

The present invention relates to a refuse-dispensing device for discharging refuse into a combustion chamber of a waste incineration plant, comprising a waste refuse shaft wall (12) enclosing a refuse-disposal shaft (14). In this case, at least a part of the refuse collection shaft wall (12) from a plurality of separate, detachably connected panels (24a-p) is formed, which on its the refuse chute (14) side facing a panel inner wall (26) and on its side facing away from the refuse chute one side panel outer wall (28) spaced from the panel inner wall and enclosing a panel cavity with the panel inner wall (26).

Description

The invention relates to a refuse-dispensing device for discharging refuse into a combustion chamber of a waste incineration plant and to a panel for such a refuse-disposal device.

Generic garbage loaders are well known in the art and generally include a hopper into which garbage from a garbage bunker is filled by crane and a garbage chute downstream of which the garbage is fed to a hopper by which it is preferably fed is introduced in a controlled manner in the combustion chamber using task tappets.

The refuse collection shaft is enclosed by a refuse hull wall supported by a support frame. In the interest of the most space-saving design of the support frame is formed in known refuse collection shaft devices as an integral part of the refuse collection shaft wall. Specifically, the Müllaufgabeschachtwand, which in turn is formed from each other welded plates, placed on the support frame. In operation of the waste incineration plant, the support frame is in the thermal zone of influence of the combustion chamber.

In order to dampen the thermal load of the refuse collection well wall with the integrated support frame in the event of a burn-back, both the refuse collection well wall and the support frame is often cooled by means of a cooling medium. In view of the fact that the refuse collection shaft wall is also exposed during operation to very high mechanical loads, wear plates are generally also welded onto the side thereof facing the refuse collection shaft or the refuse. In these known embodiments, weld seams are often formed on the side of the refuse collection well wall facing the refuse collection shaft. In the case of a burn-back, these welds can fail, which can lead to leakage of the cooling medium in the refuse chute and ultimately to a total failure of the cooling.

In particular, for the arranged in the immediate vicinity of the combustion chamber support frame can - even in the event that it is cooled - the thermal load in the event of a burn-back be so high that there is a failure of the support structure.

Incidentally, the problem arises for the wear plates provided in the known designs that they may deflect or come off due to the thermal load. This in turn can lead to bridging and thus to the impairment of a continuous waste flow through the refuse chute.

In the case of damage in known embodiments repair is often limited or possible with great effort, which is inter alia related to the fact that the individual parts are very large and heavy and also often consist of a variety of welded individual components. For a repair of said parts are thus expensive construction work necessary, which usually also involve time-consuming welding work.

Starting from the prior art, the object of the present invention is to provide a waste disposal device available, which ensures high reliability and can be maintained with relatively little effort.

The invention is solved by a refuse dispenser according to claim 1. Preferred embodiments are defined in the dependent claims.

According to claim 1, the invention relates to a refuse-dispensing apparatus for discharging refuse into a combustion chamber of a refuse incineration plant comprising a waste refuse shaft wall enclosing a refuse-disposal shaft.

According to the invention, at least part of the refuse collection well wall is formed from a plurality of separate, detachably connected panels which on their side facing the refuse feed shaft comprise a panel inner wall and, on its side facing away from the refuse feed shaft, a panel outer wall spaced from the panel inner wall and having a panel cavity with the panel inner wall encloses. The panels are usually independently solvable.

Due to the division of at least part of the refuse collection shaft wall into separate, detachably connected panels allows the present invention, in case of damage, the affected by the damage panel from the To solve composite of the panels and lift out, for example by means of a crane. Due to the relatively low weight or the relatively small dimensions of the individual panels, repair work is therefore much easier overall than in known designs. Thus, cranes with a relatively low load capacity can already be used for lifting out the affected panel, which may already be present in the system and thus need not be installed separately (as is the case, for example, for the garbage crane). In addition, for the subsequent repair accounts for on-site welding, as they are necessary for the previously known, fully welded constructions. Rather, the welds can be carried out before installation under much cheaper workshop conditions.

By virtue of the fact that the refuse discharge shaft wall or a part of the refuse collection shaft wall is formed from panels which are detachably connected to one another, in particular from one another, a refuse chute wall inner surface can be obtained, which is essentially free of weld seams. The above-described problem of prior art devices that welds fail in the event of burnback and can lead to leakage of the cooling medium in the refuse chute and / or disruptions / Ablösungen the continuous refuse flow can thus be effectively prevented according to the present invention, which contributes to a high level of operational reliability of the refuse collection device.

The panel cavity is preferably designed to receive a cooling medium during operation, and in particular of to flow through a cooling medium. As a result, a cooling surface is formed by the panel cavity, which effectively dampens the thermal load on the panel in the event of burn-back. Since each panel defines a panel cavity that can be shut off separately from the coolant supply, the present invention allows even the damaged panel, but not the entire refuse well wall, to be affected by the cooling failure even in the event of leakage, as discussed below.

As a coolant, water is usually used.

According to a particularly preferred embodiment, the refuse deposit chute wall inner surface, i. the surface which comes into direct contact with the refuse during operation of the refuse-dispensing apparatus is formed directly by the panel inner wall. In other words, in this embodiment, there are no additionally welded-on wear plates. Due to the fact that there are no further layers, such as wear plates, on the side facing the refuse feed shaft, a very good heat transfer to the cooling medium can be ensured by this embodiment.

According to a particularly preferred embodiment of the invention, the refuse-dispensing device comprises a support frame for supporting the panels of the refuse-input shaft wall, the support frame being disposed on the outside of the refuse-receiving shaft wall facing away from the refuse-receiving shaft and releasably connected to the panels of the refuse-receiving shaft wall. Since in operation between the support frame and the refuse chute always from the panel cavity with the contained therein Cooling medium formed cooling surface is present, the support frame is effectively protected in the event of burnback before a high thermal load, which contributes to a high resistance of the refuse collection device as a whole and thus also to a high level of operational safety. Due to the fact that the support frame is outside the thermal influence zone, can be dispensed with a cooling of the support frame, moreover, whereby the construction is greatly simplified.

In terms of the highest possible protection against thermal stress and a simple expandability of individual the Müllaufgabeschachtwand forming panels of the support frame is arranged according to a particularly preferred embodiment of the refuse collection shaft wall spaced. It is conceivable, for example, that the Müllaufgabeschachtwand on the carrier element spaced therefrom by means of vertical support elements, such. B. consoles, is supported.

In addition to the support frame may optionally be provided for static reasons, at least one also on the side facing away from the refuse chute outside of the refuse collection shaft wall and releasably connected to the refuse chute wall bandage. Also this is like the support frame outside the thermal influence zone, which can be dispensed with even for the bandage on a cooling.

As mentioned, the panels according to the invention are releasably connected to each other. In this regard, it is particularly preferred that in each case two adjacent panels are connected to one another via a screw connection.

In the sense of simple construction, the avoidance of horizontal shoulders, offsets and interference edges as well as better cooling and also to ensure the simplest possible lifting a panel from the panel composite, it is further preferred that the connecting line between two adjacent panels parallel to the axial direction of the refuse bins, ie usually vertical, runs. Before being lifted out, the affected panel is detached from the adjacent panels and from the support frame (and optionally from one or more horizontal bandages), usually in the form of a horizontal steel profile, and then lifted upwards in a vertical direction.

As is also explained in connection with the figures, in particular in this embodiment, the connection of two side by side panels can be effected by means of a screw connection, wherein the respectively arranged on the longitudinal sides U-profiles of both panels are screwed together. The U-profiles have corresponding screw holes for this purpose.

According to a further preferred embodiment, the panel inner wall is designed to be continuous at least in its extension in the axial direction of the refuse feed shaft, ie in the vertical direction. She is usually trained throughout the entire height of the garbage shaft. Particularly preferably, the panel inner wall is formed from a single continuous plate. It is conceivable, for example, that the plate is formed from a sheet known to those skilled in the art with weld plating or S235 sheet metal.

In said preferred embodiment, the panel inner wall is in other words free of welds, in particular horizontally extending welds. Since the weld seams in prior art devices are particularly susceptible to failure under thermal stress and just in case they run horizontally, may result in failure to the garbage disturbing paragraphs or bridges, this embodiment, the reliability of the refuse-dispensing apparatus over these prior art devices increase.

As also mentioned above, the panel cavity is preferably cooled by means of a cooling medium and particularly preferably flows through the cooling medium. In the sense of optimal cooling, deflecting ribs extending parallel to one another between the inner wall of the panel and the outer wall of the panel are preferably arranged for deflecting the cooling medium. In general, the Umlenkrippen thereby perpendicular to the axial direction of the refuse hopper, i. horizontal.

In this regard, it is particularly preferred that in each case two deflecting ribs succeeding each other in the axial direction of the refuse feed duct are arranged offset to one another. Thus, a meandering flow path is described by the cooling medium and the panel is securely cooled at each point. Due to the achieved extension of the path of the cooling medium through the panel cavity, a total of increased heat transfer to the cooling medium and thus ultimately optimal cooling is obtained. Furthermore, it may be preferred in this regard that, for example, in a first region of the panel, the distance between two successive panels is less than in a second area. Thus, for example, for the lower part, which is exposed in the case of a burn-back of a particularly high thermal load, a greater cooling effect can be achieved by a further extension of the flow path of the cooling medium, as it is necessary for an upper, thermally less heavily loaded part.

The feature that the deflecting ribs are offset relative to one another is to be interpreted broadly in the context of the present invention and includes any embodiment which results in a staggered arrangement of two longitudinally successive flow passages.

According to a further preferred embodiment, at least one part of the panels is assigned in each case one cooling medium supply line which opens into the panel cavity. This ensures that in the event of leakage, this is limited only locally to the affected panel, while the other panels or the cooling of these panels are not affected.

In the case of leakage, it is preferred that the cooling medium supply is interrupted only to the affected by the leakage panel. In order to ensure this, according to a further preferred embodiment, the cooling medium supply line is assigned means for interrupting the cooling medium supply to the respective panel cavity. Thus, in the event of damage to the panel affected by the damage, the cooling medium supply to the corresponding panel cavity may be interrupted separately, while for the panel cavity of the remaining panels is maintained. The means may be present, for example, in the form of shut-off valves known to the person skilled in the art.

In general, the cooling medium supply line supplying the cooling medium opens into a lower region of the panel cavity, which is flowed through from a lower end region to an upper end region. From the upper end region, the cooling medium passes, for example, into an overflow channel, where it is collected and available for further use, for example for a further section of the refuse-dispensing device to be cooled, or is supplied to the re-cooling.

As also explained in connection with the figures, the refuse-disposal shaft has a rectangular shape in cross-section.

Due to the rectangular cross-sectional shape of the refuse bins the refuse collection well wall is formed of four partial walls, two longitudinal side walls and two wide side walls.

According to a preferred embodiment, the total number of panels forming the refuse hull wall is in the range from 6 to 30. A number from 2 to 14 for the longitudinal side wall and a number at least 1 for the wide side wall is conceivable.

It is further preferred that at least a part of the panels is formed in the form of a rectangle with a length A and a width B. Particularly preferably, the length A corresponds substantially to the height of the respective section of the refuse-input shaft wall. typically, The length A is thus in the range of about 3 to 6 m, in particular at about 5 m.

The width B is preferably in a range of about 1 m.

Due to the selected dimensions, it is possible to ensure that the panels, both in terms of volume and weight, have dimensions which enable a relatively simple handling during the assembly or disassembly of the refuse collection shaft wall. In particular, it is conceivable that the assembly or disassembly by means of the garbage crane or by means of an auxiliary crane takes place, which have a sufficient capacity for the corresponding panels. As a rule, simple assembly aids such as tie rods or brackets are also used.

The present invention will be further illustrated with reference to the accompanying drawings.

Fig. 1

den Müllaufgabeschacht einer vorbekannten Müllaufgabevorrichtung;

Fig. 2

den Müllaufgabeschacht einer erfindungsgemässen Müllaufgabevorrichtung;

Fig. 3

eine perspektivische Ansicht eines Paneels der in Fig. 2 gezeigten erfindungsgemässen Müllaufgabevorrichtung im Schnitt quer zur Längsrichtung des Paneels;

Fig. 4

eine perspektivische Ansicht des unteren Bereiches des in Fig. 2 gezeigten Paneels in offenem Zustand ohne Paneelaussenwand; und

Fig. 5

eine perspektivische Ansicht des oberen Bereiches des in Fig. 2 gezeigten Paneels in offenem Zustand ohne Paneelaussenwand.

It shows:

Fig. 1

the refuse collection shaft of a prior art refuse dispenser;

Fig. 2

the refuse-collecting shaft of a refuse-dispensing device according to the invention;

Fig. 3

a perspective view of a panel of in Fig. 2 shown waste disposal device according to the invention in section transversely to the longitudinal direction of the panel;

Fig. 4

a perspective view of the lower portion of the in Fig. 2 panels shown in the open state without panel outer wall; and

Fig. 5

a perspective view of the upper portion of in Fig. 2 panels shown in the open state without panel outer wall.

As in Fig. 1 is shown, the previously known refuse chute device on a enclosed by a refuse chute wall 12 refuse chute 14.

The refuse collection shaft 14 has a parallel to the refuse flow direction extending axis X and in cross section a rectangular shape with a length a and a width b and takes in the in Fig. 1 concretely shown embodiment in cross section in Müllrelrichtung continuously.

Thus, in the embodiment shown, the refuse collection well wall 12 is formed of four side walls 121, 122, 123, 124, specifically two rectangular or slightly trapezoidal wide side walls 122, 124 and two trapezoidal longitudinal side walls 121, 123. The longitudinal side walls 121, 123 are each other welded plates 16 are formed, of which in Fig. 1 for the partial wall 123, five plates are shown. Welded seams 17 are thus present between the plates 16 on the waste input shaft wall inner surface 32 formed by the refuse collection shaft wall 12. In general, the previously shown known refuse-dispensing device also has welded wear plates welded onto the refuse-input shaft wall inner surface 32.

The garbage collecting shaft wall 12 formed from the side walls 121, 122, 123, 124 is welded in the lower region with a horizontally encircling steel profile 18, which rests on the truss-like support frame 22 and forms an integral part of the garbage collecting device with this in the known device. The likewise in Fig. 1 shown reinforcing ribs 20 prevent buckling of the refuse-receiving shaft wall 12th

The entire garbage shaft is cooled; the forwarding of the coolant between the individual wall surface elements via curved cooling medium channels 19th

In the in Fig. 2 shown waste disposal chute wall 12 of sixteen separate panels 24a-p is formed, wherein the two longitudinal side walls 121, 123 of seven panels 24a-g and 24i-o and the two wide side walls 122, 124 from a single panel 24h or 24p is formed.

The panels 24a-p extend in their longitudinal direction over the entire height H of the refuse feed duct 14. The length of the panels corresponds to z. B. 5 m.

Of the panels 24a-g and 24i-o of the longitudinal side walls 121, 123, in the embodiment shown, the width B of the five panels 24b-f and 24j-n, respectively not arranged at the edge, is identical and constant in the longitudinal direction, while for the two arranged on the edge panels 24a, 24g and 24i, 24o continuously increases in the direction of refuse flow. In other words, the five panels 24b-f and 24j-n arranged on the longitudinal side are not rectangular, the width B of the rectangle in the embodiment shown being approximately 1 m. For the edge arranged, preferably serving as length compensation elements panels increases the width in Müllflussrichtung to max. about 1 m too.

How about out Fig. 3 As can be seen, the panels 24a-p include a panel inner wall 26 and a panel outer wall 28 spaced therefrom which encloses a panel cavity 30 with the panel inner wall 26. The panel inner wall 26 forms due to the in Fig. 2 the fact that each panel 24a-24p extends in its longitudinal direction over the entire height H of the garbage chute and is preferably formed from a single plate, a continuous surface. The panel inner walls 26 of all panels 24a-p thereby forms the Müllaufgabeschachtwandinnenfläche 32, which thus has no horizontal paragraphs.

As in further Fig. 2 in combination with Fig. 3 is shown, two adjacent panels of a longitudinal side wall 121, 123 by means of U-profiles 34 are releasably screwed together. Thus, the refuse collection chute inner surface 32 has no weld seam between the panels, as is the case in the prior art embodiment with plates welded together.

Each panel has two, the panel on the long sides enclosing U-profiles 34 assigned. The U-profile comprises two legs 36a, 36b and a web 38 arranged therebetween. In this case, a first leg 36a of the U-profile 34 is welded to the panel inner wall 26 on its inside facing away from the refuse chute 14, so that part of the web 38 of the U-profile 34 Profile 34 terminates the panel cavity 30 on its longitudinal side. In the protruding from the panel outer wall 28 part of the U-profile 34 screw holes 40 are provided for the screw.

The support frame 22 for supporting the panels 24a-p of the refuse collection well wall 12 is as in FIG Fig. 2 shown on the outside of the refuse chute 14 facing away from the outside of the Müllaufgabeschachtwand 12 (or the panel outer wall 28) and spaced therefrom arranged. In this case, the support of the refuse collection shaft wall 12 on the support frame 22 by means of the U-profile screwed 34 supporting elements 42 takes place. Specifically, the support members 42 are bolted to the second leg 36b of the U-profile 34 in its protruding from the panel 24 section.

Next, the garbage collection shaft wall 12 is supported by means of a screwed in the upper third of the section shown with the U-profile 34, the refuse chute 14 horizontally encircling bandage 44.

According to the in Fig. 2 in combination with Fig. 4 In the embodiment shown, each of the panels 24a-p is assigned a cooling medium supply line 48 branching off from a cooling medium ring line 46. This opens into a lower end region 52 of the panel cavity 30 and has means 50 for interrupting the cooling medium supply to the respective panel cavity 30.

Like in the Fig. 4 and 5 In operation, cooling water is supplied in operation to each panel, which subsequently flows through the panel cavity 30 from the lower end portion 52 to an upper end portion 54. In the in Fig. 4 In the embodiment shown in FIG. 5, two deflecting ribs 58a, 58b successive in the axial direction of the refuse feed duct are arranged offset to one another, ie it is viewed in the longitudinal direction of the panel alternately considered a flow passage 57a and 57b on the one longitudinal side or on the longitudinal side opposite this longitudinal side of the panel. Thereby a (in Fig. 4 and 5 Described with arrows) meandering flow path described, resulting in a very efficient cooling. In the upper end region 54 of the panel cavity 30, the cooling water then passes through a Kühlmediumauslass 55 in an in Fig. 2 shown overflow trough 56, where the cooling water is collected and in the sequence z. B. the recooling is supplied.

In the event of damage, the cooling water supply to the panel affected by the damage can be interrupted and the module can be loosened by loosening the screw connection to the respectively adjacent panels, to the supporting elements and to the bandage from the composite and lifted out by means of a crane.

Claims (15)

Waste delivery device for discharging refuse into a combustion chamber of a waste incineration plant comprising a waste refuse shaft wall (12) enclosing a waste refuse shaft (14), at least part of the waste refuse shaft wall (12) being formed of a plurality of separate, detachably connected panels (24a-p), which, on its side facing the refuse feed duct (14), comprises a panel inner wall (26) and on its side facing away from the refuse feed duct a panel outer wall (28) spaced from the panel inner wall and enclosing a panel cavity (30) with the panel inner wall (26). A refuse dispensing apparatus according to claim 1, further comprising a support frame (22) for supporting the panels (24a-p) of the refuse collection well wall (12), the support frame (22) being disposed on the outside of the refuse collection well wall (12) facing away from the refuse collection well (14) the panels (24a-p) of the Müllaufgabeschachtwand (12) is detachably connected. A refuse dispenser according to claim 2, wherein the support frame (22) is spaced from the refuse collection well wall (12). Refuse dispensing device according to one of the preceding claims, wherein each two adjacent panels are connected to one another via a screw connection. Refuse dispensing device according to one of the preceding claims, wherein the connecting line between two adjacent panels runs parallel to the axial direction of the refuse feed shaft (14). Refuse dispensing device according to one of the preceding claims, wherein the panel inner wall (26) is formed continuously at least in its extension in the axial direction of the refuse feed duct (14), and in particular is formed from a single continuous plate. A refuse dispenser according to any one of the preceding claims, wherein the panel cavity (30) is adapted to receive a cooling medium. Refuse dispensing device according to claim 7, wherein between the inner panel wall (26) and the panel outer wall (28) parallel to each other leading deflecting ribs (58a, b) are arranged for deflecting the cooling medium, and preferably two in the axial direction of the refuse collection shaft (14) successive Umlenkrippen (58a, b) are offset from one another. A refuse dispensing apparatus according to any one of the preceding claims, wherein at least a part of the panels (24a-p) is associated with a cooling medium supply line (48) opening into the panel cavity (30) and the cooling medium supply line (48) is preferably with means (50) for interrupting the cooling medium supply to the respective one Panel cavity (30) are assigned. A refuse-dispensing apparatus according to any one of the preceding claims, wherein the total number of panels (24a-p) at least partially constituting the refuse collection well wall (12) is in the range of 6 to 30. A refuse dispenser according to any one of the preceding claims, wherein at least a part of the panels (24a-p) is in the form of a rectangle having a length A and a width B. Refuse dispensing apparatus according to claim 11, wherein the length A is in the range of about 3 to 6 m. Refuse dispensing apparatus according to claim 11 or 12, wherein the width B is in the range of at least about 1 m. A refuse dispenser according to any one of the preceding claims, wherein the weight of a single panel is in the range of about 1'000 to 2'000 kg. Panel for a refuse-dispensing device according to one of claims 1 to 14.

Images