JP2008267796A - Movable adjusting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a flexible tube cannot be used in a high temperature area of a fire grate to supply a cooling liquid such as cooling water to a movable fire grate element although a stoker or a fuel supply part of an incinerator has particularly a fire grate element which is movable, or driven to reciprocate, and must be continuously cooled. <P>SOLUTION: A collecting-distributing cylinder 7 is supported around a linear part 5a of a cooling water conduit 5 and fixedly connected to the feed motion of the movable fire grate element 4b through at least one conduit 10. An outflow opening 8 is formed at the linear part 5a, and cooling water reaches the inside of a fire grate conveying conduit 10 through a collecting-distributing chamber 9 located between the collecting-distributing cylinder 7 and the linear part 5a. The supply of cooling water to the movable fire grate element is thus guaranteed without using a flexible tube. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to an apparatus for continuously supplying a coolant to a grate element that is supported in a linearly movable manner in a stoker or fuel input section of an incinerator, continuously receives a reciprocating motion, and is connected to a coolant supply / discharge section.

  A stoker built in a large-scale combustion facility is composed of a number of grate rows arranged in order as is well known, and these grate rows are mostly scattered in the form of roof tiles, and these grate rows Above, combustibles are sent forward and fired at the same time. This known dual function is achieved, inter alia, by periodically moving the second grate train supported movably on the fixed grate train located in front of it and moving it back and forth periodically. The In view of the high temperatures that occur in the combustion process, the grate rod is constantly cooled by a continuous liquid stream that flows through, for example, a cooling water stream, to limit the resulting wear.

  Since such grate elements are used in the majority of large incinerators where the composition of the combustibles is constantly changing, such as garbage incinerators, the demands on their operating behavior are very high. For example, considering that this incinerator is constantly supplied with things that are distinguished by specific gravity, calorific value, breathability, humidity, etc., such a grate should achieve the desired life in an optimal combustion process It is readily understood that sometimes they are often exposed to very high temperatures and require unusual technical costs. Due to the heat released in the combustion operation, the grate elements are constantly subject to corrosion and mechanical wear and must be constantly cooled to achieve an acceptable life. In order to prevent local overheating of the grate element, its cooling should ensure as much as possible an optimum temperature distribution on the grate surface.

  The problems associated with moving grate rod coolant supply have not been solved to a satisfactory level. Certainly, it has already been attempted to direct the cooling water to the grate rod with a flexible tube, and as a result, the cooling water flow of the grate rod motion has continued. Such flexible tubes are not able to withstand the wear that occurs even for a short time, even when bearing metal or other heat shields, resulting in costly interruptions in operation.

  Patent Document 1 describes a coolant supply device that takes into account the reciprocating motion of a grate rod. For this purpose, it has been proposed to incorporate a variable length coolant cylinder into the coolant supply conduit. This coolant cylinder consists of two nested tubes guided inside each other, the outer tube being fixed, while the inner tube is movably accommodated in the outer tube and the grate rod It is mechanically connected to the movement.

  This known device certainly allows the supply of coolant despite the continuous reciprocation of the grate rods, but still plays a role in the frictional force, and a positive forward force in one motion direction, It has the disadvantage that it acts against the negative reversing forces of other movement directions. This has negative consequences on energy demand due to high furnace operating pressure. Also, it must be considered that the longer the adjustment path, the greater the risk of buckling of the piston / cylinder connection. Another drawback is that, according to this known solution, the hydraulic cross section increases during forward travel and decreases during reverse travel, which leads to negative vibration of the accessory system.

  According to patent document 2, the structure which cools only a fixed grate block with a cooling liquid is proposed. The movable grate block is involved in cooling in that the foot of the cooled fixed grate block is placed on the movable grate block and a part of the cooling action of the fixed grate block is transferred to the movable grate block. Just do it. This proposal certainly avoids the problem of cooling the movable grate block, but cooling via the foot of the fixed grate block that is in sliding contact with the movable grate block is effective for cooling water that flows through the grate block. Almost no substitute, especially the bottom surface of the sliding foot should have a length of 4-8cm and half the total length of the fixed grate block, so half of the whole grate block, ie the movable grate block is actually I accept that it won't cool down. The non-uniform heat load of the grate block associated with this solution further leads to wear that deviates significantly from the maintenance problems of the movable or fixed grate block.

  In Patent Document 3, a tube for supplying a coolant is stored outside the lower ventilation area in the case and led out through a slot provided in the case for hydraulic correction of the grate motion. Has been proposed to protect the tube from the effects of temperature and dust. A tube placed inside the case is connected to the tube and compensates for the movement of the tube fixedly connected to the grate.

  This structurally expensive solution cannot prevent premature wear of the flexible tube. This is because it is very difficult to seal the case considering the high and fluctuating temperature, and the case is subject to the high temperature itself and the resulting great wear.

European Patent Application Publication No. 1744101 European Patent No. 0899364 European Patent Application No. 0915294

  Accordingly, it is an object of the present invention to provide an apparatus that compensates for the periodic feed movement of a movable grate element. The present invention eliminates the drawbacks of the above solution and presents a solution that avoids the use of flexible tubes so that the device can be placed in a region located away from the hot zone of the grate.

  According to the present invention, “the supply of the coolant to the movable grate element is performed via a straight line portion fixedly supported outside the movable grate element, while the movable grate element that moves reciprocally moves. A collection and distribution cylinder, fixedly connected to each other, is arranged around the straight line section and is movably supported at both ends of the collection and distribution cylinder, preferably on the straight section of the line by sliding seals And the inner wall of the collection / distribution cylinder forms an outer wall of the straight portion and an annular collection / distribution chamber surrounding the outer wall, and the collection / distribution chamber further comprises at least one outflow opening of the straight portion. Connected to the cooling liquid system via the at least one conduit and connected to the cooling pipe system of the movable grate element and movably supported on a fixed linear part of the conduit Collection / distribution cylinder An outlet opening at the end of the reciprocating motion of the movable grate element is provided to allow the coolant flowing out of the pipeline to be delivered to the grate element regardless of the position of the grate element, avoiding the use of flexible tubes. The length of the collection / distribution cylinder is set and adjusted to the length of the outflow opening so that it is still located inside the collection / distribution cylinder ”. Have. Preferred embodiments arise from the dependent claims.

  Thanks to the device according to the invention, a continuous coolant supply to the movable grate train subjected to extreme thermal action is permanently ensured.

  In this regard, with reference to the drawings, an apparatus for supplying coolant to the movable grate element is described. For the discharge of the cooling liquid from the grate element, practically identical devices are arranged opposite the grate. In this specification, when the supply of coolant is described, this also applies to the discharge side in terms of structure.

  Hereinafter, an embodiment of the present invention will be described on the coolant supply side with reference to the accompanying drawings.

  FIG. 1 shows a drive device 1 that reciprocates. The drive device 1 has a piston movably accommodated in a cylinder, and acts on a support 3 of a grate carriage 11 (not shown) through a connector 2. A movable grate row 4 b is placed on the grate carriage 11 via a grate rod holder 12. On the other hand, the fixed grate row 4a is placed on the grate beam. The drive device 1 is configured so that the grate carriage 11 and the movable grate row 4b that moves together with the grate carriage 11 are periodically reciprocated on the fixed grate row 4a disposed in front of the grate carriage 11. The control of the driving device 1 is selected.

  For the continuous cooling of the movable grate element 4b with cooling pipes, the device described below with reference to the attached drawings is provided.

  The cooling water pipe 5 is connected to a cooling water supply system (not shown), and the linear portion 5a of the cooling water pipe 5 is fixed so as not to move, and can be closed in a sealed state at the end 6, for example. By providing a cardan-style fixation in the pipeline in the supply section in order to achieve a reliable fit, the device has a strong resistance to non-parallelism of expansion and relative motion. A collection / distribution cylinder 7 (see FIG. 2) is disposed around the straight portion 5 a of the cooling water pipe 5. The collection / distribution cylinder 7 is attached to the linear portion 5a through replaceable sealing packings 13a and 13b and a high-performance sealing material. The straight portion 5a has two opposing openings 8 at predetermined limited locations, and cooling water can flow from the openings 8 into the gap 9 between the inner wall of the collection / distribution cylinder 7 and the cooling water conduit 5. . The cooling water reaches the grate element through the one or more ducts 10 from the gap 9 designated as the collection / distribution chamber 9 from the function thereof.

  In this description and in the claims, a conduit that supplies or discharges a cooling liquid, for example, cooling water, depending on its location, to the grate train is designated as conduit 5 for brevity, regardless of its function. .

  Furthermore, as shown in FIG. 3, the pipe line 10 is fixed to the movable grate element 4b and reciprocates together with the movable grate element 4b. The movement of the conduit 10 is transmitted to the collecting / dispensing cylinder 7, so that the collecting / dispensing cylinder 7 slides in both directions around the linear part 5a within the stroke of the grate feeding movement. In the actual implementation of the device, a plurality of conduits 10 may be provided.

  Regardless of the movement of the collection / distribution cylinder 7, the opening 8 is always located in the collection / distribution cylinder 7, so that cooling water is continuously piped from the collection / distribution chamber 9 into the collection / distribution chamber 9. The position of the opening 8 on the conduit 5 is selected to reach or flow out into the grate element via the passage 10. The length L (FIG. 2) of the collection / distribution cylinder 7 is similar to the position of the opening 8 so that the opening 8 is also reliably located in the collection / distribution chamber 9 at the end position of the reciprocation of the grate element. It is set and adjusted together.

  FIG. 4 shows the collecting and dispensing cylinder 7 in another terminal position on the linear part 5a. In order to allow the reciprocating movement of the collecting / dispensing cylinder 7, the linear part 5a must have a length at least twice that of the collecting / dispensing cylinder 7, ie 2L.

  The grate carriage 11, and thus the movable grate element 4b, is supported on the guide rail 15 via the rollers 14 and only receives rolling friction that can be easily overcome. The movable grate element 4b, the conduit 10 fixedly connected to the movable grate element 4b, and the collection / distribution cylinder 7 constituting the single body shown in FIG. 3 are easily moved in both directions by sliding friction limited to the above components. It is free to move.

  Unlike known devices in this field, the supply of coolant is not carried out from telescopic pipes guided into one another via variable-length coolant cylinders, but instead of the movable grate element 4b. The location of the coolant supply is merely arranged to vary on the supply conduit 5. The above-mentioned device, which serves as a linear movable adjustment device, is always in the same position with respect to the movable grate train, and the supply conduit 5 or its linear part 5a is at the same time of the collecting and dispensing cylinder 7 for linear movement adjustment. It is support.

  In the above device in motion, buckling is practically eliminated by no change in assembly length.

It is a schematic perspective view which shows the assembly state of the apparatus concerning embodiment of this invention. 2 is a detailed cross-sectional view of the apparatus of FIG. It is another schematic perspective view which shows the fixed connection of the apparatus of this invention and a movable grate row | line | column. 2 shows the overall configuration of FIG. 1 with the apparatus of the present invention in another operating position.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drive device 2 Connector 3 Support 4a Fixed grate row 4b Movable grate row 5 Cooling water pipe line 5a Straight line part 7 Collection / distribution cylinder 8 Opening 9 Gap 10 Pipe line 11 Grate carriage 14 Roller 15 Guide rail

Claims (8)

In an apparatus for continuously supplying a coolant to a grate element (4) that is supported in a linearly movable manner in a stoker or fuel input section of an incinerator, continuously receives a reciprocating motion and is connected to a coolant supply / discharge section,
The supply of the coolant to the movable grate element is performed through a straight pipe line portion (5a) fixedly supported outside the movable grate element, while the movable grate element (4b) reciprocating is movable. A collection / distribution cylinder (7) fixedly connected to the support (3) is arranged around the straight line section (5a) and is preferably a sliding seal at both ends of the collection / distribution cylinder (7). (13a, 13b) is movably supported on the straight portion (5a) of the pipe line (5), and the inner wall of the collection / distribution cylinder (7) is connected to the outer wall of the straight portion (5a) and the outer wall. An annular collection / distribution chamber (9) is formed, and the collection / distribution chamber (9) is connected to the coolant system via at least one outflow opening (8) of the linear portion (5a). And via at least one conduit (10) A collecting and distributing cylinder (7) connected to the cooling pipe system of the grate element (4b) and supported movably on the fixed linear part (5a) of the pipe (5) The end position of the reciprocating motion of the movable grate element (4b) to deliver the coolant flowing out of (5) to the grate element, avoiding the use of a flexible tube, regardless of the position of the grate element The length (L) of the collection / distribution cylinder (7) is set so that the outflow opening (8) at the same position is still inside the collection / distribution cylinder (7). A device that adjusts to the length.   2. The device according to claim 1, wherein the length of the linear part (5a) corresponds to at least twice the length (L) of the collecting and dispensing cylinder (7).   A collection and distribution cylinder (7) having a connected conduit (10) and a movable grate element (4b) connected to the collection and distribution cylinder (7) via the conduit (10) are rollers (14). 3. The device according to claim 1, wherein the device is supported by rolling on the rail (15).   4. A device as claimed in claim 1, wherein the collecting and dispensing cylinder (7) is provided on its end face with a sliding seal (13a, 13b) which is exchangeable with respect to the line (5).   5. A device as claimed in claim 1, wherein the straight part (5a) passes concentrically through the collecting and dispensing cylinder (7).   6. The device according to claim 5, wherein the line (5) has two diametrically opposed coolant outlet openings (8) inside the collecting and distributing cylinder (7).   7. The device according to claim 1, wherein the conduit (5) is fixed in a cardan manner outside the linear part (5a) in view of accidental expansion and non-parallelism. .   The outflow opening (8) is straight in the line (5) so that the outflow opening (8) at both end positions of the collection / distribution cylinder (7) is located at the end of the collection / distribution cylinder (7). 8. Device according to any one of the preceding claims, arranged in the part (5a).

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