JP3616000B2 - Conveyor for ash melting furnace output - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an ash melting furnace feed conveyor, and in particular, an ash melting furnace feed that forcibly peels the feed at a discharge position of a conveyor that transports the output such as molten slag or molten metal of incinerated ash. The present invention relates to an object conveyor.
[0002]
[Prior art]
Conventionally, incineration ash such as sewage sludge, municipal waste and industrial waste, and incineration ash (powder inorganic substance) discharged from combustion furnaces such as commercial thermal power plants have been reduced to resources, volume reduction, and detoxification. For illustration, for example, it is melted by a plasma arc melting furnace 51 as shown in FIG. 3 and taken out as slag and metal.
[0003]
That is, in order to melt the incinerated ash in the melting furnace main body 52 using such a melting furnace 51, the incinerated ash discharged from the waste incinerator 53 is screened from the ashing device 54, the ash conveyor 56, the ash It is put into the furnace main body 52 through the supply conveyor 57 and the fixed amount feeding device 58, and the incinerated ash is melted by the high temperature plasma 59. As a result, molten slag 60 and molten metal 80 are generated in the furnace body 52. Therefore, one main electrode 67 and one bottom electrode (anode) 68 of plasma electrodes connected to the DC power supply device 66 are disposed on the upper and lower portions of the furnace body 52, respectively. Nitrogen gas is supplied from the nitrogen gas generator 69.
[0004]
The molten slag 60 is discharged from the outlet 61 through the outlet 62 to the dry extraction device 63. In this dry-type tapping device 63, a plurality of conveyor pans (receiving tray molds) are aligned on an endless track, and the conveyor pan distributes and receives the molten slag 60 from the tapping port 61 of the furnace body 52, The slag is transported while being air-cooled, and then the slag is peeled off from the conveyor pan at the inverted position of the conveyor pan and dropped onto the slag conveyor 64.
[0005]
The molten metal 80 under the molten slag 60 is discharged from the hot water hole formed in the lower portion of the furnace body 52 by the mud gun 81 through the tap 82 to the granulating tank 83 and dropped onto the metal conveyor 84. Go. After all the molten metal 80 has been discharged, the hot water outlet hole is closed. In addition to the tap method described above, there is a tilting method in which the molten metal is discharged by tilting the furnace body 52 as a method for discharging molten metal.
[0006]
As shown in FIG. 4, the slag conveyor 64 and the metal conveyor 84 are inclined so as to rise during transportation, and are entirely surrounded by a casing 91. Then, in order to promote the peeling between the conveyor pan and the air-cooled slag or metal at the time of discharge, a release agent such as a slurry such as slaked lime or graphite is sprayed on the surface of the conveyor pan before receiving the molten slag 60 or the molten metal 80. Spraying is performed by the nozzle 92, thereby forming a release agent layer having a thickness of about 100 μm (micrometer), for example. That is, before the molten slag 60 or the molten metal 80 falls, a release agent is applied to the mold surface so that the slag and the metal can be easily separated from the conveyor pan during discharge.
[0007]
[Problems to be solved by the invention]
However, since it is necessary to form a release agent layer having a predetermined thickness in order to ensure the release capability, the running cost of the release agent is increased. Further, since the release agent that could not be applied to the mold surface accumulates in the lower part of the casing 91, the treatment had to be carried out every day, and a heavy burden was placed on maintenance.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an ash melting furnace feed conveyor that can reduce running costs and is easy to maintain.
[0008]
The conveyor for ash melting furnace output according to the present invention includes a mold that receives the output from the melting furnace, and abuts on the mold as means for peeling the output in the mold from the mold by an external force. An ash melting furnace feed conveyor provided with a device that operates in accordance with the above, and the mold comprises a front pan and a rear pan that are divided in the traveling direction, and the peeling means comprises: It is composed of a gear that is rotatably held, and the gear rotates in one direction by coming into contact with the mold, and scrapes the output in the front pan at the tip of the gear teeth. characterized in that way the.
Further, the conveyor for the ash melting furnace feed according to the present invention is provided with a mold for receiving the feed from the melting furnace, and as a means for peeling the feed in the mold from the mold by external force, An ash melting furnace feed conveyor provided with a device that operates by contact at a feed discharge position, wherein the mold includes a front pan and a rear pan that are divided in a traveling direction, and the peeling means The tooth of the gear rotates in one direction by contacting the mold, and the tip of the tooth contacts the protruding object receiving surface of the mold to perform scraping operation. The gear is formed by alternately forming long teeth and short teeth, and the output in the front pan is peeled off with long teeth, and the output in the rear pan is peeled off with short teeth. It is characterized in.
[0009]
The peeling means performs a scraping operation on the output in the mold.
[0010]
The said peeling means is comprised with the gear rotatably hold | maintained, This gear rotates to one direction by contact | abutting to the said mold.
[0011]
The gear is arranged so that the tip end portion of the teeth abuts against the protruding object receiving surface of the mold and performs a scraping operation.
[0012]
The mold includes a front pan and a rear pan that are divided in a traveling direction, and the gear is formed by alternately forming long teeth and short teeth, and the output in the front pan is long teeth. Each item inside is peeled off with short teeth.
[0013]
A plurality of the gears are arranged along the traveling direction of the mold.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of an ash melting furnace feed conveyor according to the present invention will be described with reference to the drawings. In addition, since this invention can be used for a molten slag and a molten metal, a slag conveyor or a metal conveyor is abbreviated as simply the conveyor 1 hereinafter. In addition, the molten slag and the molten metal are hereinafter referred to as an output 2.
[0015]
As shown in FIG. 1, the spray nozzle for releasing agent spraying is not provided in the conveyor for the ash melting furnace output according to the present embodiment, but instead, the output discharge position in the casing 3 as a peeling means. A gear 4 is provided on the conveyor 1 and the output 2 is peeled off from the conveyor 1 by this gear.
[0016]
As shown in FIG. 2, the preceding tray mold 5 attached to the conveyor 1 is partitioned in the front-rear direction A by a central portion 5 c to form a front pan 5 a and a rear pan 5 b. The saucer mold 5 includes a front part 5d and a rear part 5e. The trailing tray mold 6 is similarly partitioned in the front-rear direction in the traveling direction A by the central portion 6c, and a front pan 6a and a rear pan 6b are formed. The saucer mold 6 includes a front part 6d and a rear part 6e. Although the conveyor 1 itself is inclined (see FIG. 1), the tray molds 11 and 12 are attached to the conveyor 1 so as to be in a substantially horizontal posture during linear movement, so that the heights are different and remain stepped. Move in the direction of travel A.
[0017]
In the gear 4, long teeth 41 and short teeth 42 are alternately formed, and are held rotatably. That is, no drive system is connected to the gear 4. The gear 4 is disposed so as to always contact the tray molds 5 and 6, and rotates in the rotation direction B as the tray molds 5 and 6 move in the traveling direction A. In this way, the gear 4 is rotated by the receiving tray molds 5 and 6 that move in one direction. In the present embodiment, a drive system is not connected to the gear 4 as described above, but a drive system for rotating the gear 4 may be connected.
[0018]
Next, the peeling action by the gear 4 will be described with reference to FIGS. The long teeth 41 of the gear 4 scrape off the food in the front pans 5a and 6a, and the short teeth 42 scrape off the food in the front pans 5b and 6b.
[0019]
As shown to (a) of the figure, the front-end | tip part of the short tooth | gear 42 contacts the rear pan 5b of the saucer mold 5 from the rear part 5e, and the gear 4 rotates with the movement of the saucer mold 5. As shown in FIG. Thereafter, as shown in FIG. 5B, the rear portion 5e of the saucer mold 5 enters between the short teeth 42 and the long teeth 41 and comes into contact with the tip portions 41 of the long teeth. At this time, the short teeth 42 perform an operation of scraping the tread (not shown) in the rear pan 5b, whereby the tread is peeled off from the rear pan 5b and dropped. Next, as shown in FIG. 5C, the long teeth 41 come into contact with the front pan 5a of the tray mold 6 from the central portion 5c, and the rear portion 5e of the tray mold 5 comes into contact with the short teeth 42. As the gear 4 rotates, the long teeth 41 perform an operation of scraping the spilled material (not shown) in the front pan 6a, whereby the squeezed material is peeled off from the front pan 6a and dropped. Then, as shown in (d) of the figure, the short teeth 42 come into contact with the rear pan 6b of the tray mold 6 from the rear portion 6e, and an operation of scraping the food (not shown) in the rear pan 6b is performed. As a result, the food is peeled off from the rear pan 6b and dropped. Thereafter, the same operation is repeated, and the food in the saucer mold conveyed by the conveyor 1 can be continuously peeled off.
[0020]
As shown in FIG. 1, in this embodiment, two gears 4 are arranged along the moving direction of the conveyor pan, and even if the upstream gear 4 is not sufficiently scraped, the downstream gear 4 is Furthermore, since the scraping operation is performed, it is possible to more reliably peel the food from the dish mold. The number of gears 4 is not limited to this embodiment, and may be one as long as necessary peeling is possible, and it is also possible to arrange three or more gears.
[0021]
【The invention's effect】
The ash melting furnace feed conveyor according to the present invention includes a mold that receives the feed from the melting furnace, and abuts the mold as a means for peeling the feed in the mold from the mold by an external force. Since the apparatus which operates by this is provided in the output discharge position, since the conventional release agent is not required, the running cost can be reduced and the removal work of the release agent can be omitted. Further, since the output is peeled off by applying an impact by an external force, the peeling can be reliably performed, and it is not necessary to provide a separate power source for the peeling means, and the configuration can be simplified .
[0022]
If the peeling means is configured to perform a scraping operation with respect to the output in the mold, the impact applied to the mold can be reduced and peeling can be performed more reliably.
[0023]
If the peeling means is constituted by a gear held rotatably, and the gear is configured to rotate in one direction by contacting the mold, the configuration of the peeling means can be simplified.
[0024]
If the gear is arranged so that the tip end portion of the tooth abuts against the protruding object receiving surface of the mold and performs a scraping operation, the configuration of the peeling means can be further simplified.
[0025]
The mold includes a front pan and a rear pan that are divided in a traveling direction, and the gear is formed by alternately forming long teeth and short teeth, and the output in the front pan is long teeth. If it is constituted so that the inside of the brewed material is peeled off with short teeth, the lump of the brewed material is divided into small pieces, so that peeling becomes easy, and continuous peeling can be performed efficiently.
[0026]
If a plurality of the gears are arranged along the traveling direction of the mold, peeling can be performed more reliably.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of an ash melting furnace feed conveyor according to an embodiment of the present invention.
FIGS. 2A to 2D are side views showing the relationship between a mold and a gear in FIG. 1 in an enlarged time series.
FIG. 3 is a conceptual diagram of a melting furnace to which the ash melting furnace feed conveyor according to the present invention is applied.
[Fig. 4] Conventional conveyor for ash melting furnace output [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveyor 2 Output 3 Casing 4 Gear 41 Long tooth 42 Short tooth 5, 6 Receptacle mold 5a, 6a Front pan 5b, 6b Rear pan 5c, 6c Center part 5d, 6d Front part 5e, 6e Rear part A Traveling direction B Rotation direction

Claims (3)

Provided with a mold for receiving the output from the melting furnace, and as a means for peeling the output in the mold from the mold by an external force, a device that operates by contacting the mold is provided at the output discharge position A conveyor for ash melting furnace output,
The mold includes a front pan and a rear pan formed by being divided in the traveling direction,
The peeling means is composed of a gear held rotatably,
The gear rotates in one direction by contacting the mold,
A conveyor for ash melting furnace output , wherein the output in the front pan is scraped off at the tip of the gear teeth . Provided with a mold for receiving the output from the melting furnace, and as a means for peeling the output in the mold from the mold by an external force, a device that operates by contacting the mold is provided at the output discharge position A conveyor for ash melting furnace output,
The mold includes a front pan and a rear pan formed by being divided in the traveling direction,
The peeling means is composed of a gear that is rotatably held, and the gear teeth rotate in one direction by contacting the mold,
It is arranged so that the tip of the teeth abuts against the receiving surface of the mold and performs a scraping operation.
The gear is formed by alternately forming long teeth and short teeth, and the output in the front pan is separated by long teeth and the output in the rear pan is separated by short teeth. Conveyor for furnace waste. The conveyor for ash melting furnace output according to claim 2 , wherein a plurality of said gears are arranged along the direction of travel of said mold.

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