JP2019182631A - Moving device for fire grate in incinerator - Google Patents

Abstract

To provide a moving device for a fire grate in an incinerator capable of easily and safely performing grate maintenance work in the incinerator.SOLUTION: A moving device for a fire grate in an incinerator 30 comprises a prop 31 standing up in the incinerator, an arm 43 connected to the prop 31 and capable of turning in a horizontal plane, and an elevating device 47 attached to the arm 43 for hanging fire grates 11a and 12a. The prop 31 and the arm 43 can be divided so that the prop 31, the arm 43 and the elevating device 47 can be taken in and out of the incinerator through a manhole 8 of the incinerator.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an incinerator grate moving device for moving a grate in an incinerator.

  2. Description of the Related Art As an incinerator stalker that incinerates municipal waste or the like, a movable grate row and a fixed grate row are alternately arranged in the waste feed direction. When the movable grate rows arranged alternately are reciprocated, the waste on the movable grate row and the fixed grate row moves in the feeding direction. Air blow holes are formed in each grate of the movable grate row and the fixed grate row. Combustion air supplied to the wind box below the movable grate row and the fixed grate row is blown into the waste from the air blowing holes of each grate.

  By the way, the movable grate train and the fixed grate train are used at high temperatures and are slidable with each other, so that ash or the like is fused to the grate or the grate is worn. For this reason, it is necessary to maintain a grate regularly (refer patent document 1).

  Conventional grate maintenance work involves manually removing the grate one by one from a frame called girder, carrying the removed grate onto the workbench in the incinerator, polishing and cleaning the grate on the workbench, etc. This is done by replacing the grate as necessary.

JP 2017-116237 A

  However, since the weight per grate is as much as 20 kg, for example, an excessive physical burden is required to carry the grate in the incinerator, so that there is a problem that back pain or the like is likely to occur in the operator.

  In addition, since the grate is heavy, there is a risk of causing a disaster such as a finger being pinched under the grate when an operator releases his hand from the grate, and there is a problem in terms of safety.

  This invention is made | formed in view of such a situation, and it aims at providing the grate moving apparatus in an incinerator which can perform the grate maintenance work in an incinerator easily and safely.

  In order to solve the above-described problems, an aspect of the present invention includes a support column installed inside an incinerator, an arm connected to the support column and capable of turning in a horizontal plane, and attached to the arm, Elevating device for suspending, and at least the strut and the arm are separable so that the strut, the arm and the elevating device can be taken in and out of the incinerator through the manhole of the incinerator. This is an incinerator grate moving device characterized by that.

  According to the present invention, it is possible to assemble a grate moving device in an incinerator including a column, an arm, and a lifting device inside the incinerator. If the grate is moved using the incinerator grate moving device, the grate maintenance work can be easily and safely performed.

It is a longitudinal section of an incinerator to which a grate moving device of one embodiment of the present invention is applied. It is a side view (side view seen from the Y direction) of the grate moving device of this embodiment. It is a side view (side view seen from X direction) of the grate moving device of this embodiment. It is a longitudinal cross-sectional view of the incinerator during a grate maintenance operation. It is a horizontal plan view of the incinerator during the grate maintenance work.

Hereinafter, an incinerator grate moving device (hereinafter simply referred to as a grate moving device) according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. However, the grate moving apparatus of the present invention can be embodied in various forms and is not limited to the embodiments described in the specification. This embodiment is provided with the intention of enabling those skilled in the art to fully understand the invention by fully disclosing the specification.
(Incinerator)

  First, the structure of the incinerator in which the grate moving device of one embodiment of the present invention is used will be described. FIG. 1 shows a longitudinal sectional view of an incinerator. 1 is a hopper, 2 is a combustion chamber, and 3 is a gas mixing chamber.

  The waste thrown into the hopper 1 by the crane 4 is put into the combustion chamber 2 by a predetermined amount by the dust feeder 5.

  The combustion chamber 2 is provided with grate 6a, 6b, 6c for moving waste in the feed direction (X direction) while burning the waste. The grate 6a, 6b, 6c is provided with movable grate rows and fixed grate rows arranged alternately in the waste feed direction, and reciprocating every other movable grate row to dispose of Move the object in the feed direction. Details of the movable grate train and the fixed grate train will be described later.

  The grate 6a, 6b, 6c is from the upstream side of the grate 6a in the drying stage (grate 6a on the No. 1 wind box) and the grate 6b in the combustion stage (No. 2, on the wind box of No. 3). No. 4 grate 6b) and post-combustion stage grate 6c (No. 4 grate 6c on the wind box). The grate 6a in the drying stage dries waste and partially decomposes it. The combustion stage grate 6b thermally decomposes the waste and combusts the combustible gas and solid matter generated by the thermal decomposition. The post-combustion stage grate 6c burns unburned components such as fixed carbon. The ash after combustion is discharged from the ash drop opening 7.

Exhaust gas burned in the combustion chamber 2 and unburned gas that could not be burned in the combustion chamber 2 are sent to the gas mixing chamber 3. In the gas mixing chamber 3, secondary combustion air is supplied to cause secondary combustion of unburned gas. The exhaust gas after the secondary combustion is discharged to the outside after heat recovery by the boiler.
(Grate moving device)

  As the waste is incinerated in the incinerator, ash and the like are fused and worn on the grate 6a, 6b, 6c. For this reason, it is necessary to periodically maintain the grate 6a, 6b, 6c. A grate moving device is used for the grate maintenance work.

  2 shows a side view of the grate moving device 30 of the present embodiment as seen from the Y direction, and FIG. 3 shows a side view of the grate moving device 30 as seen from the X direction. In the following, for convenience of explanation, each configuration of the grate moving device 30 will be described using the X, Y, and Z directions shown in FIGS. 2 and 3. The X direction is the feeding direction, the Y direction is the width direction of the incinerator, and the Z direction is the vertical direction.

  The grate moving device 30 includes a column 31, an arm 43, and a lifting device 47. The support column 31, the arm 43, and the lifting device 47 can be divided and are taken in and out from the manhole 8 (see FIG. 1) of the incinerator.

  The support column 31 extends in the Z direction. The column 31 includes a lower column 32, an upper column 33, and a turning unit 34. The column 31 has a role of supporting the arm 43 that rotates in a horizontal plane.

  The lower support column 32 is connected to the central partition plate 9 (see also FIG. 5) extending in the X direction of the incinerator. The central partition plate 9 cannot be machined with a screw hole or the like for fixing the lower support column 32. For this reason, the lower support | pillar 32 is connected with the center partition plate 9 as follows.

  As shown in FIG. 3, the lower end 32a of the lower support column 32 is formed in a U-shaped cross section and includes a pair of side walls 36b facing each other and an upper wall 36a connecting the pair of side walls 36b (note that FIG. 3 shows the side wall 36b and the upper wall 36a of the connecting portion 36 of the fall prevention members 35a and 35b, but the lower end 32a of the lower support column 32 has the same configuration, and therefore the same reference numerals are used. A lower end 32a of the lower support column 32 is placed on the central partition plate 9 so that the pair of side walls 36b sandwich the central partition plate 9, and the central partition plate 9 is sandwiched from both sides by bolts screwed to the pair of side walls 36b. The lower end 32 a of the lower support column 32 is connected to the central partition plate 9 by tightening.

  As shown in FIG. 2, the column 31 may fall in the X direction only by connecting the lower end 32 a of the lower column 32 to the central partition plate 9. The support column 31 is reinforced by the fall prevention members 35a and 35b provided on both sides in the X direction so that the support column 31 does not fall in the X direction.

  The fall prevention members 35 a and 35 b are separated from the lower end 32 a of the lower support column 32 in the X direction and connected to the central partition plate 9, and the reinforcing bar 37 spanned between the connection 36 and the support column 31. And comprising. The connecting portion 36 is formed in a U-shaped cross section as described above. The connecting portion 36 is connected to the central partition plate 9 by tightening the central partition plate 9 so as to be sandwiched from both sides with bolts screwed into the pair of side walls 36b.

  The upper column 33 is connected to the upper end of the lower column 32. A flange 32 b is integrally formed at the upper end portion of the lower support column 32. A flange 33 a is also integrally formed at the lower end of the upper column 33. The lower support column 32 and the upper support column 33 are connected by bolts that pass through the flanges 32b and 33a.

  The turning part 34 is connected to the upper end part of the upper column 33. The swivel unit 34 includes a vertical shaft 38 fixed to the upper support column 33 and a main body 39 rotatably connected to the vertical shaft 38 via a bearing. A flange 38 a is integrally formed at the lower end portion of the vertical shaft 38. A flange 33 b is integrally formed at the upper end portion of the upper column 33. The swivel unit 34 and the upper column 33 are connected by bolts that pass through the flanges 38a and 33b.

  Moreover, the lower support | pillar 32, the upper support | pillar 33, and the turning part 34 are the weight which an operator can take in and out of an incinerator, for example.

  The arm 43 is connected to the turning portion 34 of the support column 31. The arm 43 includes a first arm 44, a second arm 45, and a vertical shaft 46. The arm 43 can turn in a horizontal plane, and has a role of moving the grate 6a, 6b, 6c lifted by the lifting device 47 in the horizontal direction. The arm 43 may be moved manually or may be moved by a driving source such as a motor.

  The first arm 44 is connected to the turning unit 34. A flange 44 a is formed integrally with the base portion of the first arm 44. A flange 39a is also formed integrally with the main body 39 of the turning portion 34. The 1st arm 44 and the turning part 34 are connected by the volt | bolt which let the flanges 44a and 39a pass. Since the first arm 44 is cantilevered by the turning portion 34, it is reinforced by the truss structure.

  The second arm 45 is connected to the distal end portion of the first arm 44 via the vertical shaft 46. The first arm 44 and the second arm 45 can be bent like an elbow joint. Since the second arm 45 is cantilevered by the first arm 44 via the vertical shaft 46, it is reinforced by the truss structure.

  The lifting device 47 includes a chain block, an electric hoist and the like. The lifting device 47 has a role of lifting the grate 6a, 6b, 6c. The elevating device 47 is attached to the tip of the second arm 45 by a hook or the like. A clamp 48 that holds the grate 6a, 6b, 6c is provided at the lower end of the lifting device 47.

  As shown in FIG. 3, the steadying member 41 includes a central rod 41a, a pair of end rods 41b, and a pair of jacks 41c. The steadying member 41 is connected to the upper end portion of the column 31. The steady rest member 41 extends between the pair of facing furnace walls 40, 40 extending in the Y direction. The steadying member 41 has a role of reinforcing the support column 31 so as not to fall in the Y direction.

  The center part rod 41 a is connected to the vertical shaft 38 of the turning part 34. The pair of end rods 41b are connected to the central rod 41a so as to be positionally adjustable in the axial direction. The jack 41c is attached to the end rod 41b. After adjusting the length of the steady member 41, the jack 41c is operated to firmly fix the steady member 41 to the furnace wall 40.

  The 1st arm 44, the 2nd arm 45, the raising / lowering apparatus 47, and the steadying member 41 are the weight which an operator can take in and out to an incinerator by one person, for example.

  The configuration of the grate moving device 30 of the present embodiment has been described above. According to the grate moving device 30 of the present embodiment, the following effects can be obtained.

  Since the grate moving device 30 includes the support 31, the arm 43, and the lifting device 47, the grate 6 a, 6 b, 6 c is lifted by the grate moving device 30, and the hung grate 6 a, 6 b, 6 c is lifted in the incinerator. Can be moved. Moreover, since the support | pillar 31, the arm 43, and the raising / lowering apparatus 47 can be divided | segmented, these can be taken in / out from the manhole 8 of an incinerator, and the grate moving apparatus 30 can be assembled in an incinerator.

  Since the lower end 32a of the support column 31 is connected to the central partition plate 9 extending in the X direction of the incinerator, the grate moving device 30 can be arranged in the center of the incinerator.

  Since the steadying member 41 extending in the Y direction is connected to the upper end portion of the support column 31, the support column 31 can be prevented from falling in the Y direction.

  Since the support column 31 is reinforced by the fall-preventing members 35a and 35b arranged apart in the X direction, the support column 31 can be prevented from falling in the X direction.

  Since the lower column 32, the upper column 33, and the swivel unit 34 can be divided, the column 31 can be easily put in and out of the incinerator.

Since the arm 43 includes the first arm 44, the second arm 45, and the vertical shaft 46, the operating range of the arm 43 can be expanded, and centering when lifting the grate 6a, 6b, 6c is facilitated. Moreover, since the 1st arm 44 and the 2nd arm 45 can be divided | segmented, taking in / out of the arm 43 in an incinerator becomes easy.
(Grate maintenance work)

  4 shows a longitudinal sectional view of the incinerator during the grate maintenance work, and FIG. 5 shows a horizontal sectional view of the incinerator during the grate maintenance work. 4 and 5, the X direction, which is the waste feeding direction, is opposite to that in FIG. 1, and the right side is the upstream side and the left side is the downstream side.

  The movable grate row 11 and the fixed grate row 12 will be described with reference to FIGS. As shown in FIG. 4, the movable grate rows 11 and the fixed grate rows 12 are alternately arranged in the feed direction X. As shown in FIG. 5, the movable grate array 11 is composed of a plurality of movable grate 11a (hereinafter simply referred to as a grate 11a) arranged in the Y direction perpendicular to the X direction. The fixed grate array 12 is also composed of a plurality of fixed grate 12a (hereinafter simply referred to as a grate 12a) arranged in the Y direction.

  As shown in FIG. 4, in each grate 11a of the movable grate row 11, an engagement recess 13 is formed below the upstream end, and an air blowing hole 14 is formed at the downstream end. The engaging recess 13 of the grate 11a is detachably mounted on a shaft 15 extending in the Y direction. The downstream end of the grate 11a rests on the grate 12a of the fixed grate row 12 located on the downstream side. The shaft 15 is supported by the movable frame 16. The movable frame 16 is reciprocated by a hydraulic cylinder 17. When the movable frame 16 reciprocates, the movable grate train 11 reciprocates together with the movable frame 16, and waste is sent in the X direction.

  Similarly to the grate 11a, the engagement recess 19 and the air blowing hole 20 are formed in the grate 12a of the fixed grate row 12 as well. The engaging recess 19 is detachably mounted on a shaft 21 extending in the Y direction. The downstream end of the grate 12a is placed on the grate 11a of the movable grate row 11 located on the downstream side. The shaft 21 is supported by the fixed frame 22.

  With reference to FIGS. 4 and 5, the maintenance work after the assembly of the grate moving device 30 will be described. The grate 11a adjacent to the movable grate row 11 in the Y direction is connected by a bolt. The same applies to the grate 12a adjacent to the fixed grate row 12 in the Y direction. In maintenance work of the grate 11a, 12a, the worker A first removes the bolts connecting the grate 11a, 12a. The removal work is performed in a wind box below the grate 11a, 12a.

  As shown in FIG. 5, the removed grate 11 a and 12 a are moved onto the work table 51 using the grate moving device 30. On the work table 51, the worker B inspects the grate 11a, 12a. The grates 11 a and 12 a that have been inspected are moved onto the work table 52 using the grate moving device 30. On the work table 52, workers C and D grind and clean the grate 11a and 12a with a grinder or an air chipper. The grates 11 a and 12 a that have been polished and cleaned are returned to predetermined positions of the movable grate row 11 and the fixed grate row 12 using the grate moving device 30. In FIG. 5, 9 is a central partition plate, 10a and 10b are side seal hardware, and 10c is a scaffold plate placed on the frame.

  Use of the grate moving device 30 facilitates maintenance work for the following reason. The grate 11a and 12a can be attached and detached in a state where, for example, five are connected together, and the remaining bolts can be attached and detached in an easy posture on the work table, so that maintenance work is facilitated. In addition, since the number of bolts in the wind box below the grate 11a, 12a is reduced, maintenance work is facilitated.

  By using the grate moving device 30, safety is also improved for the following reasons. The handling of heavy objects by hand is drastically reduced to the minimum at the time of polishing, cleaning, and bolt removal, thus improving safety. Further, conventionally, the bolts of the fixed grate train 12 have to be removed / attached at the forward end of the movable grate train 11, and the bolts of the movable grate train 11 have to be removed at the backward end of the movable grate train 11. . That is, it is necessary to detach the bolt in two steps, that is, the forward end and the reverse end of the movable grate row 11. However, if the grate moving device 30 is used, the grate 11a and 12a can be pulled out, so that the bolts of both the fixed grate row 12 and the movable grate row 11 are attached and detached at an intermediate position of the movable grate row 11. be able to. Furthermore, since the movable grate train 11 is not moved during the grate maintenance work, safety is improved.

  Note that the present invention is not limited to the embodiment described above, and can be changed to other embodiments without departing from the gist of the present invention.

  In the above embodiment, the fixed grate train and the movable grate train are arranged horizontally, but the fixed grate train and the movable grate train can be arranged stepwise or obliquely.

8 ... Manhole 9 ... Central partition plates 11a, 12a ... Grate 30 ... Grate moving device 31 in the incinerator 31 ... Column 32 ... Lower column 32a ... Lower column 33 of column ... Upper column 34 ... Swivel unit 35a, 35b ... Prevention of collapse Member 38 ... Vertical shaft 40 ... Furnace wall 41 ... Stabilization member 43 ... Arm 44 ... First arm 45 ... Second arm 46 ... Vertical shaft 47 ... Lifting device

Claims (6)

A support column installed inside the incinerator;
An arm connected to the support column and capable of turning in a horizontal plane;
A lifting device attached to the arm and for hanging a grate,
At least the support column and the arm can be divided so that the support column, the arm, and the lifting device can be taken in and out of the incinerator through a manhole of the incinerator. apparatus.   2. The incinerator grate moving device according to claim 1, wherein a lower end portion of the support column is connected to a central partition plate extending in an X direction which is a combustion material feeding direction.   3. The incinerator according to claim 2, wherein an upper end portion of the support column extends in a Y direction perpendicular to the X direction, and both end portions are connected to a steady member that contacts a furnace wall of the incinerator. Inner grate moving device.   4. The incinerator grate according to claim 2, wherein the support column is reinforced by a fall prevention member that is separated from the lower end portion of the support column in the X direction and is connected to the central partition plate. Mobile device. The support column includes a lower support column, an upper support column connected to the lower support column, and a swivel unit connected to the upper support column so as to be rotatable about a vertical axis.
5. The incinerator grate moving device according to claim 1, wherein the lower support column, the upper support column, and the swivel unit are separable. The arm includes a first arm coupled to the support column, and a second arm coupled to the first arm so as to be rotatable about a vertical axis.
6. The incinerator grate moving device according to claim 1, wherein the first arm and the second arm can be divided.

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