Waste feed device

Abstract

The present invention relates to a waste feed device for feeding waste into a combustion space of a waste incineration plant, including a waste feed shaft wall surrounding a waste feed shaft. In this case, at least part of the waste feed shaft wall is formed from a multiplicity of separate panels which are connected releasably to one another and which comprise, on their side facing the waste feed shaft, a panel inner wall and, on their side facing away from the waste feed shaft, a panel outer wall which is spaced apart from the panel inner wall and which with the panel inner wall surrounds a panel cavity.

Claims

1. A waste feed device for feeding waste into a combustion space of a waste incineration plant, comprising a waste feed shaft wall surrounding a waste feed shaft, at least part of the waste feed shaft wall is formed from a multiplicity of separate panels which are connected releasably to one another and which comprise, on their side facing the waste feed shaft, a panel inner wall and, on their side facing away from the waste feed shaft, a panel outer wall which is spaced apart from the panel inner wall and which with the panel inner wall surrounds a panel cavity.

2. The waste feed device as claimed in claim 1, further comprising a supporting frame for carrying the panels of the waste feed shaft wall, the supporting frame being arranged on the outside, facing away from the waste feed shaft, of the waste feed shaft wall and being connected releasably to the panels of the waste feed shaft wall.

3. The waste feed device as claimed in claim 2, the supporting frame being arranged so as to be spaced apart from the waste feed shaft wall.

4. The waste feed device as claimed in claim 1, in each case two adjacent panels being connected to one another via a screw connection.

5. The waste feed device as claimed in claim 1, the connecting line between two adjacent panels running parallel to the axial direction of the waste feed shaft.

6. The waste feed device as claimed in claim 1, the panel inner wall being formed continuously at least in its extent in the axial direction of the waste feed shaft.

7. The waste feed device as claimed in claim 1, the panel cavity being intended for receiving a cooling medium.

8. The waste feed device as claimed in claim 7, deflecting ribs which run parallel to one another being arranged between the panel inner wall and the panel outer wall in order to deflect the cooling medium.

9. The waste feed device as claimed in claim 8, in each case two deflecting ribs which succeed one another in the axial direction of the waste feed shaft being arranged so as to be offset to one another.

10. The waste feed device as claimed in claim 1, at least some of the panels being assigned in each case a cooling medium supply line issuing into the panel cavity, and the cooling medium supply line.

11. The waste feed device as claimed in claim 1, the overall number of panels which at least partially form the waste feed shaft wall lying in the range of 6 to 30.

12. The waste feed device as claimed in claim 1, at least some of the panels being designed in the form of a rectangle with a length and a width.

13. The waste feed device as claimed in claim 12, the length lying in the range of approximately 3 to 6 m.

14. The waste feed device as claimed in claim 12, the width lying in the range of at least approximately 1 m.

15. The waste feed device as claimed in claim 1, the weight of an individual panel lying in the range of approximately 1,000 to 2,000 kg.

Description

(1) The present invention is illustrated further by means of the accompanying figures in which:

(2) FIG. 1 shows the waste feed shaft of a previously known waste feed device;

(3) FIG. 2 shows the waste feed shaft of a waste feed device according to the invention;

(4) FIG. 3 shows a perspective view of a panel of the waste feed device according to the invention, shown in FIG. 2, in the section transverse to the longitudinal direction of the panel;

(5) FIG. 4 shows a perspective view of the lower region of the panel shown in FIG. 2, in the open state without a panel outer wall; and

(6) FIG. 5 shows a perspective view of the upper region of the panel shown in FIG. 2, in the open state without a panel outer wall.

(7) As shown in FIG. 1, the previously known waste feed shaft device has a waste feed shaft 14 surrounded by a waste feed shaft wall 12.

(8) The waste feed shaft 14 has an axis X running parallel to the waste flow direction and, in cross section, a rectangular shape with a length a and a width b and, in the embodiment shown in concrete terms in FIG. 1, increases continuously in cross section in the waste flow direction.

(9) Thus, in the embodiment shown, the waste feed shaft wall 12 is formed from four side walls 121, 122, 123, 124, in concrete terms two wide side walls 122, 124 formed at right angles or slightly trapezoidally and two trapezoidal longitudinal side walls 121, 123. The longitudinal side walls 121, 123 are formed in each case from plates 16 which are welded to one another and of which FIG. 1 shows five plates for the subwall 123. Weld seams 17 are therefore present between the plates 16 on the waste feed shaft wall inner surface 32 formed by the waste feed shaft wall 12. Moreover, as a rule, the previously known waste feed device shown has wearing plates welded on the waste feed shaft wall inner surface 32.

(10) The waste feed shaft wall 12 formed from the side walls 121, 122, 123, 124 is welded in the lower region to a steel profile 18 running around horizontally, which lies on the truss-like supporting frame 22 and, in the previously known device, forms with this an integral part of the waste feed device. The reinforcing ribs 20, likewise shown in FIG. 1, prevent the waste feed shaft wall 12 from bulging out.

(11) The overall waste shaft is cooled; the transfer of the coolant between the individual wall surface elements takes place via arcuate cooling medium ducts 19.

(12) In the waste feed device according to the invention, shown in FIG. 2, the waste feed shaft wall 12 is formed from sixteen separate panels 24a-p, the two longitudinal side walls 121, 123 being formed in each case from seven panels 24a-g and 24i-o and the two wide side walls 122, 124 are formed in each case from a single panel 24h and 24p.

(13) The panels 24a-p extend in their longitudinal direction over the entire height H of the waste feed shaft 14. The length of the panels corresponds, for example, to 5 m.

(14) 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 not arranged in each case at the margin is identical and is constant in the longitudinal direction, whereas, for the two panels 24a, 24g and 24i, 24o arranged at the margin, it increases continuously in the waste flow direction. In other words, the five panels 24b-f and 24j-n not arranged at the margin on the longitudinal side are rectangular, the width B of the rectangle amounting to approximately 1 m in the embodiment shown. For the panels arranged at the margin and preferably serving as length compensation elements, the width increases in the waste flow direction to a maximum of approximately 1 m.

(15) As will be gathered, for example, from FIG. 3, the panels 24a-p comprise a panel inner wall 26 and a panel outer wall 28 which is spaced apart from this and which with the panel inner wall 26 surrounds a panel cavity 30. Since, as shown in FIG. 2, each panel 24a-24p extends in its longitudinal direction over the entire height H of the waste shaft and is preferably formed from a single plate, the panel inner wall 26 forms a continuous surface. The panel inner walls 26 of all the panels 24a-p in this case form the waste feed shaft wall inner surface 32 which therefore has no horizontal steps.

(16) As is shown further in FIG. 2 in combination with FIG. 3, in each case two adjacent panels of a longitudinal side wall 121, 123 are screwed releasably to one another by means of U-profiles 34. Consequently, the waste feed shaft inner surface 32 has no weld seam between the panels, as is the case in the previously known embodiment with plates welded to one another.

(17) Each panel is assigned two U-profiles 34 bordering the panel on the longitudinal sides. The U-profile comprises two legs 36a, 36b and a web 38 arranged between them. 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 waste feed shaft 14, so that part of the web 38 of the U-profile 34 closes off the panel cavity 30 on its longitudinal side. In that part of the U-profile 34 which projects from the panel outer wall 28, screw holes 40 for the screw connection are provided.

(18) The supporting frame 22 for carrying the panels 24a-p of the waste feed shaft wall 12 is, as shown in FIG. 2, arranged, on the outside, facing away from the waste feed shaft 14, of the waste feed shaft wall 12 (or of the panel outer wall 28), so as to be spaced apart from the latter. In this case, the support of the waste feed shaft wall 12 on the supporting frame 22 takes place by means of supporting elements 42 screwed to the U-profile 34. In concrete terms, the supporting elements 42 are screwed to the second leg 36b of the U-profile 34 in its portion projecting from the panel 24.

(19) Further, the waste feed shaft wall 12 is supported by means of a binding band 44 screwed to the U-profile 34 in the upper third of the portion shown and running around the waste feed shaft 14 horizontally.

(20) According to the embodiments shown in FIG. 2, in combination with FIG. 4, each of the panels 24a-p is assigned a cooling medium supply line 48 branching off from a cooling medium ring line 46. Said cooling medium supply line 48 issues into a lower end region 52 of the panel cavity 30 and has means 50 for interrupting the supply of cooling medium to the respective panel cavity 30.

(21) As shown, for example, in FIGS. 4 and 5, during operation each panel is supplied with cooling water which flows in succession through the panel cavity 30 from the lower end region 52 as far as an upper end region 54. In the embodiments shown in FIGS. 4 and 5, in each case two deflecting ribs 58a, 58b succeeding one another in the axial direction of the waste feed shaft are arranged so as to be offset to one another, that is to say, as seen in the longitudinal direction of the panel, a flow passage 57a or 57b is located alternately on one panel longitudinal side and on the panel longitudinal side lying opposite this longitudinal side. In this case, a meandering flow path (indicated in FIGS. 4 and 5 by arrows) is followed, thus leading to highly efficient cooling. In the upper end region 54 of the panel cavity 30, the cooling water then passes via a cooling medium outlet 55 into an overflow gutter 56, shown in FIG. 2, where the cooling water is collected and is subsequently delivered, for example, for recooling.

(22) In the event of damage, the supply of cooling water to the panel affected by the damage can be interrupted, and the module can be released from the composite structure by the release of the screw connection to the in each case adjacent panels, to the supporting elements and to the binding band and can be lifted out by means of a crane.