JP3756601B2 - Gas shielding valve device used for waste charging equipment of waste melting furnace - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to municipal waste such as mixed collection waste, separated collection waste, oversized waste and waste such as sewage sludge, rubber, tires, shells, etc., or waste melting treatment equipment used for treatment of waste oil, sludge, metal scrap, etc. It is related with the gas shielding valve apparatus which can be used for the refuse charging apparatus of the waste melting furnace which forms a part.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is a waste melting furnace waste charging apparatus C in the form shown in FIG. 8 as a waste charging furnace waste charging apparatus used in a waste melting treatment facility.
As shown in the figure, a waste charging chute 81 is connected to the upper portion of the waste melting furnace 80. An inner cylinder 82 provided at the lowermost part of the dust charging chute 81 is inserted into the waste melting furnace 80. An inclined guide surface 84 for dropping garbage toward the extension line 83a is provided at a position offset from the extension line 83a of the axis 83 of the waste melting furnace 80 below the garbage charging chute 81. In addition, an auxiliary material charging port 85 is provided on the upper surface of the dust charging chute 81 and in the vicinity of the extension line 83 a of the axis 83 of the waste melting furnace 80, while the dust charging port 84 is disposed above the inclined guide surface 84. 87 is provided. A lower opening of a cylindrical intermediate hopper 88 is connected to the garbage loading port 87, and a lower opening of a charging hopper 89 is connected to the upper opening of the intermediate hopper 88. In addition, a garbage bucket 90 for collecting garbage from a garbage pit and feeding it into the loading hopper 89 is disposed above the charging hopper 89.
[0003]
As shown in FIG. 8, an expanded sealed space 91 is formed in the upper part of the intermediate hopper 88, and a lower opening of the charging hopper 89 is located in the expanded sealed space 91. A gas shielding valve device 92 comprising a seal packing and a packing moving mechanism for horizontally moving the seal packing is attached. The gas shielding valve device 92 is also disposed in the expanded sealed space 91.
Further, the lower opening of the intermediate hopper 88 is communicated with the dust loading inlet 87 of the dust charging chute 81 by a sealed communication cylinder 93 provided on the upper surface of the dust charging chute 81. A dust receiving damper 95 comprising a pair of rotating gates 94 is attached to the lower opening of the intermediate hopper 88.
[0004]
Further, a dust charging inlet 87 of the garbage charging chute 81 communicated with the lower opening of the sealed communication cylinder 93 is located in a sealed space 96 of the garbage charging chute 81, and the dust charging inlet 87 includes a lower portion. A seal valve 97 is attached.
[0005]
With this configuration, when putting garbage into the waste melting furnace 80, first, with the dust receiving damper 95 and the lower seal valve 97 closed, the gas shielding valve device 92 is opened, and the garbage in the garbage bucket 90 is intermediated. Put into hopper 88. Thereafter, the gas shielding valve device 92 is closed, the dust receiving damper 95 and the lower seal valve 97 are opened, and the dust in the intermediate hopper 88 is put into the waste melting furnace 80 through the dust charging chute 81.
Thereafter, by repeating the above-described operation, a predetermined amount of garbage is introduced into the waste melting furnace 80 and melted, and the generated combustible in-furnace gas (generated gas) is not leaked to the charging hopper 89 side. Garbage can be charged into the furnace.
[0006]
[Problems to be solved by the invention]
However, the waste charging furnace C described above still has the following problems to be solved.
That is, since the seal packing and the packing moving mechanism constituting the gas shielding valve device 92 are both disposed in the expanded sealed space 91, inspection and repair are difficult, and the seal packing in the narrow expanded sealed space 91 is particularly difficult. The replacement work was extremely complicated. On the other hand, if the seal packing is not sufficiently maintained, the gas in the furnace containing CO leaks out of the system, causing the waste melting furnace 80 to malfunction and causing the operation to stop, or the gas in the furnace becomes a garbage pit. There was a problem with the safety of work in the garbage pit.
[0007]
The present invention has been made in view of such circumstances, and is a waste melting furnace that can be easily and reliably inspected and can reduce the release of gas in the furnace to the outside as much as possible. An object of the present invention is to provide a gas shielding valve device used for a garbage charging apparatus.
[0008]
[Means for Solving the Problems]
The gas shielding valve device used in the waste melting furnace waste charging apparatus according to claim 1, which meets the above-mentioned purpose, has a waste charging chute connected to the upper part of the waste melting furnace, and is connected to the upper part of the waste charging chute. A gas shielding valve device used for a waste charging apparatus of a waste melting furnace constituted by connecting a cylindrical intermediate hopper in communication and connecting an input hopper to the upper part of the intermediate hopper, The gas shielding valve device is interposed in the communication connecting portion of the intermediate hopper, and the gas shielding valve device is separated from the waste charging position vertically aligned with the intermediate hopper and the waste charging device of the waste melting furnace. A traveling carriage movable between the waiting position and the intermediate position when the carriage is placed on the traveling carriage via a compression spring and moved to the garbage input position integrally with the traveling carriage. Relieved A valve plate positioned immediately above the upper end opening of the heater, a lifting cylinder attached to the lower portion of the charging hopper so as to be movable up and down, and when the valve plate is moved to the garbage charging position, the lifting cylinder is lowered. The lower surface of the valve plate is brought into contact with the upper end opening of the intermediate hopper against the urging force of the compression spring, the upper end opening of the intermediate hopper is sealed, and the valve plate is moved to the standby position. In this case, there is provided an elevating mechanism for lowering the elevating cylinder and bringing it into contact with the upper end opening of the intermediate hopper so as to communicate and connect the charging hopper and the intermediate hopper in an airtight state.
[0009]
The gas shielding valve device used in the waste charging furnace waste charging apparatus according to claim 2 is the gas shielding valve apparatus used in the waste melting furnace waste charging apparatus according to claim 1, wherein When the first seal packing is attached and the valve plate is moved to the garbage input position integrally with the traveling carriage, the first cylinder is lowered to resist the biasing force of the compression spring. This seal packing is brought into contact with the upper end opening of the intermediate hopper to seal the upper end opening of the intermediate hopper.
[0010]
The gas shielding valve device used in the waste charging furnace waste charging device according to claim 3 is the gas shielding valve device used in the waste melting furnace waste charging device according to claim 1 or 2, wherein When the second seal packing is attached to the lower end and the valve plate is moved to the standby position, the elevating cylinder is lowered to bring the second seal packing into contact with the upper end opening of the intermediate hopper, The charging hopper and the intermediate hopper are connected in an airtight state.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
First, with reference to FIG. 1, about the whole structure of the refuse charging apparatus A of the waste melting furnace which comprises the gas shielding valve apparatus used for the waste charging apparatus of the waste melting furnace which concerns on one embodiment of this invention. Briefly described.
[0012]
As shown in the figure, a waste charging chute 11 is connected to the upper part of the waste melting furnace 10. An inner cylinder 12 provided at the lowermost part of the garbage charging chute 11 is inserted into the waste melting furnace 10. An inclined guide surface 14 for dropping garbage toward the extension line 13a is provided at a position offset from the extension line 13a of the axis 13 of the waste melting furnace 10 below the garbage charging chute 11. In addition, a secondary material inlet 15 is provided at a location on the ceiling wall 11a of the waste charging chute 11 on the extension line 13a of the axis 13 of the waste melting furnace 10, and on the other hand, above the inclined guide surface 14. A waste inlet 16 is provided at the eggplant. A lower end opening portion of a cylindrical intermediate hopper 17 is connected to the garbage loading port 16 via an expansion communication cylinder 20, and a charging hopper 18 is connected to an upper end opening portion 17 a (see FIG. 7) of the intermediate hopper 17. The lower end opening is continuously provided. Further, a garbage bucket 19 a for collecting garbage from a garbage pit and feeding it into the charging hopper 18 is disposed above the charging hopper 18.
[0013]
Further, as shown in FIG. 1, the waste melting furnace waste charging apparatus A includes three gas shielding valve devices 19, a lower gas shielding valve 22, and a lower heat A shielding valve 23 is incorporated.
That is, a gas shielding valve device 19 that can be taken out to the outside is attached between the lower end opening of the charging hopper 18 and the upper end opening 17 a of the intermediate hopper 17.
The lower part of the intermediate hopper 17 is connected in an airtight manner to the upper part of the dust charging chute 11 via the expansion communication cylinder 20, and an expansion sealed space 21 is formed in the expansion communication cylinder 20. Yes. A lower gas shielding valve 22 made of a single plate for opening and closing the lower end opening of the intermediate hopper 17 is disposed in the expanded sealed space 21 so as to be swingable in the vertical direction around the base. .
Further, in the garbage charging chute 11, a lower heat shielding valve 23 made of a single plate is also disposed around the base so as to be swingable in the left-right direction.
[0014]
Next, the gas shielding valve device 19 according to the present invention will be described in detail with reference to FIGS.
As shown in FIGS. 4 and 7, a pair of traveling rails 27 are supported by struts 26 on a work floor 25 that forms both sides of the upper end opening 17 a of the intermediate hopper 17. As shown in FIGS. 1 to 3, one end of each extends to a standby position 28 outside the furnace that is separated from the intermediate hopper 17 by a predetermined distance.
As shown in FIGS. 4 and 7, a valve plate 29 made of a flat rectangular frame constituting the main part of the gas shielding valve device 19 is straddled on the upper end opening 17 a of the intermediate hopper 17. That is, as shown in FIGS. 4, 5, and 7, both side portions in the width direction of the valve plate 29 are elastically placed on the left and right beams 54, 55 of the traveling carriage 31 formed of a rectangular frame via the compression spring 30. Placed and supported.
[0015]
Further, as shown in FIGS. 5 and 6, brackets 31 a and 31 b having longitudinal grooves are respectively provided on the front and rear beams 52 and 53 of the traveling carriage 31, and longitudinal grooves are respectively provided at the front and rear end portions of the valve plate 29. Brackets 29a and 29b are projected, and pivot pins 48 and 49 are inserted through these vertically long grooves. Therefore, as will be described later, when the valve plate 29 is pressed by the bracket 38 attached to the lifting cylinder 36, the valve plate 29 can be smoothly lifted and lowered with respect to the traveling carriage 31. As shown in FIGS. 4, 5, and 7, the traveling wheel 32 that is rotatably attached to the traveling carriage 31 is mounted on the traveling rail 27 so as to be able to roll. 3 and 6, the traveling carriage 31 includes front and rear beams 52 and 53 and left and right beams 54 and 55, and prevents the collision with the upper end opening 17 a of the intermediate hopper 17. As shown, the front beam 52 is raised above the other beams 53, 54, and 55.
[0016]
As shown in FIG. 7, on the lower surface of the valve plate 29, an annular first seal packing 34 made of an elastic material pressed against an annular seal ring 33 made of steel bar attached to the upper end opening 17 a of the intermediate hopper 17. Is installed.
As shown in FIGS. 4 and 7, an elevating cylinder 36 is fitted on the outer peripheral surface of the lower straight cylinder portion 35 of the charging hopper 18 so as to be movable up and down. An annular second seal packing 37 made of an elastic material that is selectively pressed against the annular seal ring 33 is attached via a bracket 38.
[0017]
The upper part of the elevating cylinder 36 is connected to the lower end of a telescopic cylinder 39 such as a bellows via a bracket 38, while the upper end of the telescopic cylinder 39 is fixedly connected to the upper part of the lower straight cylinder part 35 of the charging hopper 18. .
In the upper inclined wall 40 of the charging hopper 18 and directly above the traveling rails 27, the upper ends of a pair of lifting cylinders 41, which are examples of lifting mechanisms, are suspended by brackets 41b. The lower end of the elevating cylinder 41 is connected to the bracket 38.
[0018]
As shown in FIGS. 2 to 6, in this embodiment, the moving mechanism of the valve plate 29 includes a driving sprocket 42 disposed on one end side of the traveling rail 27 and a cover on the other end side of the traveling rail 27. A drive-side sprocket 43 is disposed, and both ends of the drive chain 44 wound between the sprockets 42 and 43 are connected to both end portions 45 and 46 of the traveling carriage 31 on which the valve plate 29 is mounted. . As shown in FIGS. 2 and 3, the drive-side sprocket 42 is linked to the output shaft of the rotary motor 47 via the rotary shaft 50 and the speed reducer 51.
[0019]
Next, the operation of the gas shielding valve device 19 having the above-described configuration will be described.
When the garbage is thrown in, the valve plate 29 and the traveling carriage 31 are in the standby position 28 outside the furnace in FIGS. 2 and 3, so that the telescopic rod 41a of the elevating cylinder 41 is advanced as shown in FIG. By inserting the lower end of the lifting cylinder 36 into the upper end opening 17a of the intermediate hopper 17 and pressing the second seal packing 37 against the annular seal ring 33, the charging hopper 18 and the intermediate hopper 17 are connected to each other. can do. Thereafter, the waste can be thrown into the intermediate hopper 17 through the feeding hopper 18 without being scattered outside.
When the upper end opening 17a of the intermediate hopper 17 is sealed, the telescopic rod 41a of the elevating cylinder 41 is retracted as shown in FIG. The two seal packings 37 are raised, and a space large enough for the valve plate 29 to enter can be formed between the elevating cylinder 36 and the bracket 38 and the upper end opening 17a of the intermediate hopper 17. .
[0020]
Thereafter, by moving the drive chain 44 driven by the rotary motor 47, the valve plate 29, together with the traveling carriage 31, moves from the standby position 28 directly above the intermediate hopper 17 to the waste input position (position shown in FIG. 7B). ) And the first seal packing 34 is aligned with the annular seal ring 33.
Next, as shown in FIG. 7C, the valve rod 29 is moved downward via the pressing beam 38a attached to the lower surface of the bracket 38 by advancing the telescopic rod 41a of the elevating cylinder 41, and a compression spring. The first seal packing 34 can be pressed against the annular seal ring 33 against the elastic force of 30, and the upper end opening 17a of the intermediate hopper 17 can be completely sealed.
Thereafter, the lower gas shielding valve 22 and the lower heat shielding valve 23 are opened, so that the waste gas in the intermediate hopper 17 does not leak out the generated gas (furnace gas) generated in the waste melting furnace 10 to the outside. It can be put into the waste melting furnace 10.
[0021]
By the way, in the above-described dust charging operation, in the present embodiment, the gas shielding valve device 19 can be retreated to the standby position 28 outside the furnace when not used for the sealing operation. Can be replaced easily and in a short time. Furthermore, since the traveling carriage 31, which is the moving mechanism of the valve plate 29, the rotary motor 47 and the like are also arranged on the outside of the furnace, there is no influence of dust or dust, Maintenance and inspection of the gas shielding valve device 19 is facilitated.
Even when the valve plate 29 is retracted to the standby position 28 together with the traveling carriage 31, the elevating cylinder 36 is lowered and brought into contact with the upper end opening 17 a of the intermediate hopper 17, so that the charging hopper 18 and the intermediate hopper 17 are brought into contact with each other. Since it is connected in an airtight state, it is possible to reliably prevent dust thrown into the charging hopper 18 from being scattered outside.
[0022]
【The invention's effect】
The gas shielding valve device used in the waste melting furnace waste charging apparatus according to any one of claims 1 to 3 is separated from the waste charging position of the waste melting furnace and the waste charging position vertically aligned with the intermediate hopper. A traveling carriage that is movable between the standby position and the carriage is mounted on the traveling carriage via a compression spring. A valve plate positioned directly above, a lifting cylinder attached to the lower portion of the charging hopper so as to be movable up and down, and when the valve plate is moved to the garbage charging position, the lifting cylinder is lowered to resist the biasing force of the compression spring. The lower surface of the valve plate is brought into contact with the upper end opening of the intermediate hopper to seal the upper end opening of the intermediate hopper, and when the valve plate is moved to the standby position, the lifting cylinder is lowered to open the upper end opening of the intermediate hopper. Abutment hopper Comprising an elevating mechanism configured to communicably connected to an intermediate hopper airtight.
[0023]
In this way, in the dust charging operation, the gas shielding valve device can be retreated to the standby position outside the furnace when not used for the sealing operation, so that the seal packing and the like can be replaced easily and in a short time, and Since the traveling carriage, which is the moving mechanism of the valve plate, is also arranged on the outside of the furnace, it is not affected by dust and dust, and the maintenance and inspection of the gas shielding valve device is facilitated.
Also, when the valve plate is retracted to the standby position together with the traveling carriage, the lifting cylinder is lowered and brought into contact with the upper end opening of the intermediate hopper, so that the closing hopper and the intermediate hopper are connected in an airtight state. It is possible to reliably prevent the dust thrown into the charging hopper from being scattered outside.
[0024]
In the gas shielding valve device used for the waste melting furnace waste charging apparatus according to claim 2, the first seal packing is attached to the lower surface of the valve plate, and the valve plate is integrated with the traveling carriage at the garbage input position. When moved, the lifting cylinder is lowered and the first seal packing is brought into contact with the upper end opening of the intermediate hopper against the urging force of the compression spring to seal the upper end opening of the intermediate hopper. .
Thus, since the valve plate can be brought into contact with the upper end opening of the intermediate hopper via the first seal packing, the sealing performance of the intermediate hopper by the gas shielding valve device can be further improved.
[0025]
4. The gas shielding valve device used in the waste melting furnace waste charging apparatus according to claim 3, wherein when the second seal packing is attached to the lower end of the lifting cylinder and the valve plate is moved to the standby position, the lifting cylinder The second seal packing is brought into contact with the upper end opening of the intermediate hopper so that the charging hopper and the intermediate hopper are connected in an airtight state.
As described above, since the lifting cylinder can be brought into contact with the upper end opening of the intermediate hopper via the second seal packing, it is possible to improve the airtightness of the communication connection between the charging hopper and the intermediate hopper when the garbage is charged. it can.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a waste melting furnace waste charging device including a gas shielding valve device used in a waste melting furnace waste charging device according to an embodiment of the present invention.
FIG. 2 is a front view of the gas shielding valve device.
FIG. 3 is a plan view of the gas shielding valve device.
FIG. 4 is a side sectional view of the gas shielding valve device.
FIG. 5 is an enlarged front view of the gas shielding valve device.
FIG. 6 is an enlarged plan view of a main part of the gas shielding valve device.
FIG. 7 is an operation explanatory diagram of the gas shielding valve device.
FIG. 8 is an explanatory diagram of a conceptual configuration of a conventional waste charging apparatus for a waste melting furnace.
[Explanation of symbols]
A Waste Refuse Furnace Refuse Charger 10 Waste Refuse Furnace 11 Refuse Charge Chute 11a Ceiling Wall 12 Inner Tube 13 Axis 13a Extension Line 14 Inclined Guide Surface 15 Secondary Material Charger 16 Garbage Charger 17 Intermediate Hopper 17a Top Opening Section 18 Input hopper 19 Gas shielding valve device 19a Garbage bucket 20 Expansion communication tube 21 Expansion sealed space 22 Lower gas shielding valve 23 Lower heat shielding valve 25 Work floor 26 Support column 27 Travel rail 28 Standby position 29 Valve plate 29a Bracket 29b Bracket 30 Compression spring 31 Traveling carriage 31a Bracket 31b Bracket 32 Traveling wheel 33 Annular seal ring 34 First seal packing 35 Lower straight cylinder part 36 Elevating cylinder 37 Second seal packing 38 Bracket 38a Pressing beam 39 Telescopic cylinder 40 Upper inclined wall 41 Elevating cylinder 41a After condensation rod 41b bracket 42 driving sprocket 43 driven sprocket 44 drive chain 45 end 46 end portion 47 rotates the motor 48 pivot pin 49 pivot pin 50 rotation shaft 51 speed reducer 52 prior beam 53 beam 54 left beam 55 right beam

Claims (3)

A waste charging chute is connected to the upper part of the waste melting furnace, a cylindrical intermediate hopper is connected to the upper part of the waste charging chute, and a charging hopper is connected to the upper part of the intermediate hopper. A gas shielding valve device used for a waste charging device of a waste melting furnace,
The gas shielding valve device is interposed in the communication connecting portion of the charging hopper and the intermediate hopper, and the gas shielding valve device is
A traveling carriage movable between a waste charging position vertically aligned with the intermediate hopper and a standby position separated from a waste charging device of the waste melting furnace;
A valve plate that is placed on the traveling carriage via a compression spring and is positioned directly above the upper end opening of the intermediate hopper when moved to the garbage input position integrally with the traveling carriage;
A lifting cylinder attached to the lower part of the charging hopper so as to be movable up and down;
When the valve plate is moved to the dust loading position, the lift cylinder is lowered to bring the lower surface of the valve plate into contact with the upper end opening of the intermediate hopper against the urging force of the compression spring. The upper end opening of the hopper is sealed, and when the valve plate is moved to the standby position, the elevating cylinder is lowered and brought into contact with the upper end opening of the intermediate hopper so that the charging hopper and the intermediate hopper are A gas shielding valve device for use in a waste melting furnace waste charging device, comprising an elevating mechanism that communicates and connects in an airtight state. A first seal packing is attached to the lower surface of the valve plate, and when the valve plate is moved to the garbage input position integrally with the traveling carriage, the elevating cylinder is lowered to the urging force of the compression spring. 2. The waste charging apparatus for waste melting furnace according to claim 1, wherein the upper end opening of the intermediate hopper is sealed by bringing the first seal packing into contact with the upper end opening of the intermediate hopper. Gas shielding valve device used for A second seal packing is attached to the lower end of the lifting cylinder, and when the valve plate is moved to the standby position, the lifting cylinder is lowered to place the second seal packing into the upper end opening of the intermediate hopper. 3. A gas shielding valve device for a waste charging apparatus for a waste melting furnace according to claim 1, wherein the charging hopper and the intermediate hopper are brought into contact with each other in an airtight state.

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