JP7089385B2 - Water-sealed ash-out conveyor device - Google Patents

Description

The present invention relates to a waste incinerator, and particularly relates to a water-sealed ash-out conveyor device that facilitates discharge of floating unburned matter.

A water-sealed ashing conveyor device capable of continuously discharging incinerated ash from a waste incinerator is known. The water-sealed ashing conveyor device is equipped with a pair of endless chains straddled over gears arranged at both ends in the water-sealed casing and a large number of scrapers connected at regular intervals between the pair of chains. It is common to have a so-called scraper chain.

The water-sealed casing is a water tank for storing cooling water, and the gears described above are installed at both ends of the water-sealed casing above the water surface of the cooling water. One of the gears is the drive gear and the other is the driven gear. The drive gear is driven by an appropriate electric motor (motor). The number of driven gears is not limited to one, and a plurality of driven gears may be installed depending on the size of the conveyor device, the shape of the tension, the type of chain, and the like.

The ash removal conveyor device is installed in the lower part of the ash discharge part of the incinerator to receive the incinerator discharged from the incinerator, and the incineration ash accumulated on the bottom wall of the water-sealed casing is provided in the vicinity of the gear with a scraper. The operation of scraping it up to the discharge chute and taking it out to the outside is continuously performed. Examples of disclosure of this type of prior art include Patent Document 1, Patent Document 2, Patent Document 3, and the like.

Patent Document 1 is a machine tool provided with a screen plate having a large number of pores in which a conveyor having a wiper blade on a side chain is tilted from the liquid level of the coolant onto the liquid level, and a scraper is slid to scoop up foreign matter. Disclosed is a processing device that separates chips such as metal from the coolant of a machine.

In Patent Document 2, a sorting portion having a slit that abuts on the scraper of a chain conveyor with a scraper is installed in the lower part of the return side of the conveyor in a cooling water tank, and a large-diameter granulated slag is discharged to the outside by the scraping operation of the scraper. Discloses the molten slag processing technology. There is also a description that the floating ash existing above the cooling water is conveyed by the scraper on the outer periphery of the return side conveyor.

Patent Document 3 includes a chain conveyor with a scraper, which is arranged under a furnace bottom hopper and is straddled at both upper ends of a water tank (casing) containing water for water sealing and scoops up ash in the water tank. Disclosed is a water-sealed bottom ash conveyor device that scrapes incinerator ash accumulated on the bottom wall of the furnace with a scraper and discharges it to the outside.

Japanese Patent No. 54892311 Japanese Patent No. 3370497 Japanese Unexamined Patent Publication No. 07-12325

Incinerators for industrial waste include a stoker type, a rotary kiln type, and a fluidized bed type. In all incinerators, the incinerator ash discharged from the incinerator has a high temperature and is accompanied by a large amount of dust, so many of them are equipped with a take-out device using a so-called water-sealed chain conveyor.

The water-sealed chain conveyor device is installed below the bottom hopper of the incinerator, and the lower end of the bottom hopper is immersed in cooling water to seal the incineration ash discharge port with water.
Then, a chain conveyor is arranged inside the water-sealed casing that immerses the lower part of the furnace bottom hopper. The chain conveyor is hung between gears (usually sprockets) provided on one end side upper side and the other end side upper side of the water seal casing so as to move across the bottom of the furnace bottom hopper in the water seal casing. It consists of a pair of parallel chains with a passed scraper. Considering the operation in a harsh environment, this chain is generally a short link chain.

By the way, in an incinerator that treats various kinds of waste such as medical waste, various mixed wastes are put into the furnace, but they are not completely incinerated under the specified incineration conditions and are discharged from the furnace as unburned matter. Something that is done is also mixed. When such unburned material floats near the upper surface of the cooling water (hereinafter, also referred to as water-sealed water) of the water-sealed casing and stays in the furnace bottom hopper region shown in FIG. 1 without being caught by the scraper of the chain conveyor. There is.
If the amount is large, it will be deposited on the upper layer of the water-sealed water in the bottom hopper to form a large lump, forming a so-called incombustible bridge that cannot be discharged, resulting in a difficult state of discharge.

If an incombustible bridge is formed, it will be necessary to temporarily stop the incinerator and manually remove the accumulated incombustibles. Manual removal of incombustibles near the bottom hopper of a high-temperature incinerator is not only inefficient but also extremely dangerous. In addition, even if the incinerator is temporarily shut down, it is necessary to reduce the amount of processing due to the shutdown and to consume extra fuel for incinerator due to the restart.

Furthermore, since the incinerator in which this type of water-sealed chain conveyor device is installed operates in an environment with high temperature and a large amount of dust, it is difficult to install a camera for observing the inside, especially incinerator. It is almost impossible to install a surveillance camera because there is almost no visibility inside the bottom hopper where ash falls into the water. Therefore, it is necessary to mobilize personnel during operation and periodically check the presence or absence of unburned substances as described above by regular patrols.

An object of the present invention is to solve the above-mentioned problems, eliminate the retention of unburned matter floating in the bottom hopper near the bottom hopper, and reduce the occurrence of a situation where the incinerator is stopped as much as possible. It is an object of the present invention to provide a highly efficient and highly safe water-sealed ash-out conveyor device.

In order to achieve the above object, the present invention utilizes the return side traveling (movement of the conveyor chain) of the water-sealed conveyor to collect the unburned material floating in the water-sealed water and discharge it exclusively for the unburned material. It was configured to be discharged to the chute.

A typical configuration of the present invention is described below. In the following, in order to facilitate understanding, the constituent elements of the present invention are designated by the corresponding reference numerals in the examples, but the present invention is not limited to the configurations with these reference numerals, and the present invention is not limited to the present invention. Needless to say, various changes can be made without departing from the technical idea of the invention.

<1> The water-sealed ash-out conveyor device (1) according to the present invention includes a water-sealed casing (2) that seals cooling water and immerses the lower part of the bottom hopper (21) of the incinerator (20). A drive gear (5) provided on one end side of the water seal casing (2) and a drive gear (5) provided on the other end side so as to move across the lower part of the furnace bottom hopper (21) in the water seal casing (2). It has a chain conveyor (3) consisting of a pair of chains with scrapers (4) spanned between driven gears (6). In the present invention, this chain conveyor is also referred to as a scraper conveyor or simply a conveyor.

The forward (F) side chain (3a) of the chain conveyor (3) is scraped and conveyed to one end side of the water-sealed casing (2) by the scraper (4) as it travels in the forward direction (F). A bottom ash discharge chute (9) is provided for carrying out the incinerated ash that has settled on the bottom wall of the water-sealed casing (2).

The bottom hopper (21) is located below the chain conveyor (3) on the return side (R) on the downstream side of the chain conveyor (3) in the traveling direction when viewed from the bottom hopper (21) of the chain conveyor (3). A guide bottom plate (7) for scraping and transporting the unburned material (30) floating in the vicinity of) to the other end side of the water-sealed casing (2) with the scraper (4) is provided.

On the other end side of the water-sealed casing (2), an unburned material discharge chute (10) for carrying out the unburned material (30) that has been lifted and conveyed is provided.

<2> Direction of depositing in water-sealed water on the unburned material (30) floating near the furnace bottom hopper (21) located on the upstream side of the chain conveyor (3) on the return side (R) in the traveling direction. A fluid injection nozzle (14) for applying a force (preferably in the return direction (R) of the chain conveyor) is provided, and the scraper (4) is provided as the chain conveyor (3) travels in the return direction (R). The guide bottom plate (7) facilitates the capture and scraping and transportation of the unburned material (30).
It is desirable that the injection direction of the fluid injection nozzle (14) is directed toward the traveling direction of the chain conveyor on the return side (R) so that the floating unburned material is directed to the traveling direction of the chain conveyor on the return side (R). It is preferable to incline the chain conveyor in the traveling direction at an angle.

<3> The fluid injected by the fluid injection nozzle (14) is a high-speed air flow, and the unburned material (30) is sealed with water (16) by the pressing force of the high-speed air flow injected from the fluid injection nozzle. ), The unburned material (30) is allowed to flow in the traveling direction of the chain conveyor (3b) on the return side by passing through the water-sealed portion of the furnace bottom hopper (21), facilitating capture by the scraper. There is.

<4> The fluid injected by the fluid injection nozzle (14) is a fine bubble mass, and the unburned material (30) is water-sealed by reducing the buoyancy caused by the reduction in the density of the water-sealed water due to the bubble mass. It is submerged in water (16), passed through the water-sealed portion of the furnace bottom hopper (21), the unburned material (30) is allowed to flow in the traveling direction of the chain conveyor (3b) on the return side, and is captured by the scraper. Is facilitating.

<5> The fluid injected by the fluid injection nozzle (14) can be a high-pressure water stream, and the unburned material (30) is pushed into the water-sealed water (16) by the pressing force of the high-pressure water stream. The unburned material 30 is allowed to pass through the water-sealed portion of the furnace bottom hopper (21) in the traveling direction of the chain conveyor (3b) on the return side, facilitating capture by the scraper.

<6> The front end region of the guide bottom plate (7) on the furnace bottom hopper (21) side is submerged in the water sealing water (16), and the rear end region on the driven gear (6) side is the driven. It is installed so as to gradually escape from the water-sealed water (16) toward the vicinity of the gear (6) in substantially parallel to the chain conveyor (3b) on the return side.

<7> The guide bottom plate (7) is visually recognized at a position corresponding to the front end region of the guide bottom plate (7) on the furnace bottom hopper (21) side on the other end side of the water-sealed casing (2). An inspection window (13) is provided for this purpose.

<8> An endless chain of a pair of parallel short links was used for the chain conveyor. The fluid injection nozzle (14) is not limited to the one in which the injection portion is submerged in the water-sealed water, and the fluid is injected from a position away from the water surface of the water-sealed water in consideration of the injection pressure. May be good. Further, the installation position is not limited to the upstream in the chain conveyor traveling direction on the return side in the furnace bottom hopper (21) in consideration of the type of unburned material and the like, and the water sealing ash discharge conveyor device (1). It is also possible to install the fluid injection nozzle (14) directly above or on the side surface in a state where the fluid injection nozzle (14) is horizontally translated with an inclination angle. The number may be plural, or it may have a flat slit-shaped injection port.

With the above configuration of the present invention, the floating unburned material is conveyed by the scraper of the conveyor without forming the unburned material bridge at the lower end of the furnace bottom hopper, and is transported from the water-sealed water to the unburned material discharge chute. By the cooperation of the guide bottom plate and the scraper, the incombustibles are surely conveyed by the scraper chain that runs close to or slides on the guide bottom plate, and the incombustibles can be smoothly discharged to the incombustibles discharge chute. It will be possible.

Further, by adopting the configuration of the present invention, it is not necessary to temporarily stop the incinerator to perform dangerous manual removal work, and the incinerator can be continuously operated with high work efficiency. Moreover, it is possible to avoid the consumption of extra fuel costs.

It is a schematic diagram explaining the Example of the water-sealing ash-out conveyor device which concerns on this invention. It is a top view of the main part which looked down from the incinerator side of the water-sealed ash-out conveyor device shown in FIG. It is a schematic diagram of a main part which looked at the main part from the line AA of FIG. It is explanatory drawing of the transport mode by the trapping of unburned matter by the scraper conveyor of the water-sealing ash discharge conveyor apparatus shown in FIG. 1 and the cooperation with a guide bottom plate. It is explanatory drawing of the effect of the fluid injection nozzle of the water seal ash discharge conveyor apparatus shown in FIG. 1, the capture of unburned matter by a scraper conveyor, and the transport mode by cooperation with a guide bottom plate. It is a schematic diagram explaining the whole structure example of the water-sealing ash-out conveyor device which concerns on this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings of Examples.

FIG. 1 is a schematic view illustrating one embodiment of the water-sealed ash-delivering conveyor device 1 according to the present invention, and FIG. 2 is a top view of a main part of the water-sealed ash-delivering conveyor device 1 viewed downward from the incinerator 20 side. 3 is a schematic diagram of a main part of the main part seen from the line AA of FIG.
In the figure, 1 is a water-sealed ash-out conveyor device, 2 is a water-sealed casing, 3 is a chain conveyor with a scraper (chain conveyor), 4 is a scraper, 5 is a drive gear, 6 is a driven gear, 7 is a guide bottom plate, and 8 is. The drive motor, 9 is a bottom ash discharge chute.
In addition, 10 is an unburned material discharge chute, 11, 12, 13 are inspection windows, 14 is a fluid injection nozzle, 15 is a support stand, 16 is water sealing water (cooling water), 17 is air bubbles, 20 is an incinerator, 21. Is the bottom hopper, 22 is incinerator ash (including unburned material), and 30 is buoyant unburned material.
In this embodiment, the water-sealed casing 2 is a substantially U-shaped container that surrounds the transport path of the chain conveyor 3 with a scraper, and water-sealed water (cooling water) 16 is provided so that the chain conveyor 3 with a scraper is submerged in the central region. Stored and sealed.

The water-sealed ash-out conveyor device 1 according to the present invention moves across the water-sealed casing 2 for immersing the lower part of the bottom hopper 21 of the incinerator 20 and the bottom of the bottom hopper 21 in the water-sealed casing 2. As described above, the chain conveyor 3 with a scraper is provided with a pair of chains running in parallel with a scraper 4 spanned between a drive gear 5 provided on one end side of the water-sealed casing 2 and a driven gear 6 provided on the other end side. The incinerator ash 22 containing unburned matter falls from the bottom hopper 21 into the water-sealed water 16.

One end side of the water-sealed casing 2 is the bottom wall of the water-sealed casing 2 that is scraped and conveyed by the scraper 4 as the chain 3a with the scraper travels on the forward side (arrow F) in the forward direction (F). It is provided with a bottom ash discharge chute 9 for carrying out the incineration ash that settles on the outside.

Then, the unburned material 30 floating in the vicinity of the bottom hopper 21 at the lower part of the chain conveyor 3 on the return side on the downstream side in the traveling direction of the chain conveyor 3 when viewed from the bottom hopper 21 of the chain conveyor 3 with a scraper. A guide bottom plate 7 is provided on the other end side of the water-sealed casing 2 with a scraper 4 for scraping and transporting.
It is preferable that the water-sealed casing 2 is provided with an inspection window 13 at a position where the tip region of the guide bottom plate 7 (the portion engaged with the scraper 4 close to the furnace bottom hopper 21) can be observed. The inspection window 13 also has a function of removing the floating unburned material 30 when it is caught in the tip region of the guide bottom plate 7 and is clogged.

Further, on the other end side of the water-sealed casing 2, an incombustible material discharge chute 10 for carrying out the incombustible material 30 that has been scraped up and conveyed by the chain conveyor 3 with a scraper is provided. The water-sealed ash-delivering conveyor device 1 is supported by a support stand 15. The drive gear 5 is driven by the drive motor 8.
Inspection windows 11 and 12 are provided at positions facing the drive gear 5 and the driven gear 6 of the water-sealed casing 2, respectively, so that the states of the drive gear 5 and the driven gear 6 can be inspected. Another function of the inspection window 12 is to confirm clogging when the unburned matter 30 floating from the rear end region of the guide bottom plate 7 is discharged to the unburned matter discharge chute 10.

The water-sealed ash-delivering conveyor device 1 according to the present invention has the unburned material 30 floating in the vicinity of the furnace bottom hopper 21 on the upstream side of the return side (R) of the chain conveyor 3 in the traveling direction. A fluid injection nozzle 14 for pushing into the water-sealed water 16 to pass through the water-sealed portion of the furnace bottom hopper 21 and giving a force to flow the unburned material 30 in the traveling direction of the chain conveyor 3b on the return side. It is a structure provided.
The fluid injection nozzle 14 injects an air flow, a gas flow, a bubble mass, a water flow, or the like into the water-sealed water 16 or toward the water surface. By this injection, the unburned material 30 is pushed into the water-sealed water 16 to pass through the water-sealed portion of the furnace bottom hopper 21, and the unburned material 30 is allowed to flow in the traveling direction of the chain conveyor 3b on the return side. The scraper 4 and the guide bottom plate 7 facilitate the capture and scraping transfer of the unburned material 30 as the chain conveyor 3 with the scraper travels in the return direction (R).

Typically, the fluid injected by the fluid injection nozzle 14 is a high-speed air flow, and the unburned material 30 is pushed into the water-sealed water 16 by the pressing force of the high-speed air flow injected from the fluid injection nozzle 14. The unburned material 30 is allowed to pass through the water-sealed portion of the furnace bottom hopper 21 in the traveling direction of the chain conveyor 3b on the return side, facilitating capture by the scraper 4.
In this embodiment, four fluid injection nozzles 14 are installed, but the present invention is not limited to this. The fluid injection direction of the fluid injection nozzle 14 may be arbitrarily changed or swung.

Further, a fine bubble mass can be used as the fluid to be injected by the fluid injection nozzle 14. The fine bubble mass can be realized by charging, for example, a porous filter made of ceramics into the tip of a fluid injection nozzle 14 installed by inserting it into the water-sealed water 16 and using an air flow as the fluid. The bubble mass reduces the density of the water-sealed water 16, and by wrapping the unburned material 30 in the bubble mass, the buoyancy caused by the decrease in the density of the surrounding water-sealed water 16 is reduced, so that the unburned material 30 is contained in the water-sealed water 16. The unburned material 30 is allowed to flow in the traveling direction of the chain conveyor 3b on the return side to facilitate capture by the scraper 4. It is also possible to introduce gas in the furnace instead of air.

Further, a high-pressure water flow can be used as the fluid to be injected by the fluid injection nozzle 14. By pushing the unburned material 30 into the water-sealed water 16 with the pressing pressure of the high-pressure water flow, the unburned material 30 is made to pass through the water-sealed portion of the furnace bottom hopper 21 and the unburned material 30 is moved in the traveling direction of the chain conveyor 3b on the return side. Flush to facilitate capture by scraper 4.

FIG. 4 is a diagram illustrating a mode of capturing unburned matter by a chain conveyor with a scraper of the water-sealed ash-delivering conveyor device 1 shown in FIG. 1 and transporting the unburned material in cooperation with a guide plate.
The region of the guide bottom plate 7 on the furnace bottom hopper 21 side is submerged in the water-sealed water 16. The rear end region of the guide bottom plate 7 on the driven gear 6 side is installed so as to gradually escape from the water-sealed water 16 toward the vicinity of the driven gear 6 substantially in parallel with the movement of the chain 3b on the return side.

FIG. 4 shows a case where the unburned material 30 has a relatively small levitation property and is easily captured by the scraper 4 due to the disturbance of the water-sealed water 16 or the like, and it is not necessary to use the above-mentioned fluid injection nozzle. This is an explanation of the situation in which the chain conveyor 3 with a scraper can be operated.

FIG. 5 is an explanatory diagram of the effect of the fluid injection nozzle of the water-sealed ash-out conveyor device shown in FIG. 1, the capture of unburned matter by the chain conveyor with a scraper, and the transport mode in cooperation with the guide bottom plate. The unburned material 30 floating by blowing is submerged, passed through the water-sealed portion of the furnace bottom hopper 21 and flowed in the traveling direction of the chain conveyor 3b on the return side, and the scraper 4 of the chain conveyor 3 with a scraper is used. Shows the state of being captured when the conveyor belt rises from the surface of the water. In this example, the unburned matter 30 is prevented from accumulating on the lower part of the furnace bottom hopper 21 and forming a bridge.

In the configuration example shown in FIG. 5, the tip of the fluid injection nozzle 14 is installed in a state of being inserted into the water-sealed water 16, but it is not always necessary to insert the fluid injection nozzle 14 into the water, and the fluid injection nozzle 14 is brought close to the surface of the water-sealed water 16. It may be arranged.
That is, of the incineration ash 22 discharged from the incinerator 20, the floating unburned material 30 stays on the surface layer of the water-sealed water 16, so that the unburned material 30 is exposed to air from the fluid injection nozzle 14. It is configured to inject a stream or the like into the water-sealed water 16.

The floating unburned material 30 is caught in the air flow blown from the fluid injection nozzle 14, passes through the water-sealed portion of the furnace bottom hopper 21, and flows in the traveling direction of the chain conveyor 3b on the return side. The scraper 4 of the chain conveyor 3 with a scraper rises from the water surface and is captured by the scraper 4 of the chain conveyor 3 with a scraper. The unburned material 30 captured by the scraper 4 is conveyed to the position where the guide bottom plate 7 is arranged by the movement of the scraper 4 by traveling in the arrow R direction of the chain 3b on the return side. Since the guide bottom plate 7 serves as a saucer for the unburned material 30 transported to the top of the guide bottom plate 7, the unburned material 30 does not fall from between the scrapers 4 of the chain conveyor 3 with a scraper, and is downstream as the chain 3b on the return side moves. It is conveyed to the side and discharged from the 7a portion of the guide bottom plate to the unburned material discharge chute 10. There is a clearance for the scraper 4 to pass and move between the 7a portion of the guide bottom plate and the incombustibles discharge chute 10, but the incombustibles 30 can be discharged to the incombustibles discharge chute 10 with the force of falling. By continuing this operation, it is possible to prevent the unburned material 30 from accumulating at the lower part of the bottom hopper 21 and forming a bridge.

In the embodiment shown in FIG. 5, the air flow blown from the fluid injection nozzle 14 is supplied from the high-pressure air source of the compressor 23, the reservoir tank 24, and the valve 25.
A water-containing porous filter is charged at the tip of the fluid injection nozzle 14 to generate fine air, and the fine bubbles are jetted below the incombustible material 30 to enclose the combustible material in the water-sealed water 16. The buoyancy is lowered by lowering the density of the incombustible material, the incombustible material is submerged to pass through the water-sealed portion of the furnace bottom hopper 21, and the incombustible material 30 is allowed to flow in the traveling direction of the chain conveyor 3b on the return side. , It can also be easily captured by the scraper 4.

Further, instead of the air flow, the gas in the furnace bottom hopper 21 or the gas in the furnace atmosphere can be used.
The injection of fluid from the fluid nozzle 14, including the above-mentioned injection of air flow, does not have to be constantly driven, and the valve 25 needs to be driven periodically or at any time according to the type of incinerator symmetry and the experience of the worker. Can be released. Further, it is also possible to install a sensor for detecting the floating state of the unburned material 30 in the furnace bottom hopper 21 and control the opening and closing of the valve 25 based on the sensor output.

FIG. 6 is a diagram illustrating an overall configuration example of the water-sealed ash-delivering conveyor device according to the present invention. The water-sealed casing 2 is installed in the lower part of the incinerator 20. The drive gear 5 side of the water-sealed casing 2 has a bottom ash discharge chute 9 that discharges the incinerated ash scraped up from the bottom wall of the water-sealed casing 2 to the outside, and the lower part of the bottom ash discharge chute 9 is a conventional one. Similarly, the incinerator ash recovery cart 26 goes in and out.

Further, the driven gear 6 side of the water-sealed casing 2 has an incombustible material discharge chute 10 for discharging the buoyant incombustible material 30 to the outside, and an incombustible material recovery cart is provided below the incombustible material discharge chute 10. 27 is coming in and out. The unburned matter 30 collected in the unburned matter recovery cart 27 is returned to the incinerator again and incinerated. At this time, it is possible to avoid or reduce the generation of unburned matter again by performing dehydration or drying treatment before returning to the incinerator again.

The incinerator 20 of the present embodiment is a rotary kiln furnace, but the water-sealed ash discharge conveyor device 1 according to the present invention is not limited to carrying out the incinerator ash of the rotary kiln furnace, and is similarly applied to a combination with a stalker furnace or the like. can.

The chain conveyor used for the chain conveyor 3 with a scraper in this embodiment is a short link chain, but other types of chains such as a roller chain can also be used. For use in a harsh environment such as an ashing conveyor in an incinerator, a short link chain having a simple structure and good durability is suitable.

In the above embodiment, the transport process of incinerated ash in the incinerator facility has been described, but the present invention is not limited to this, and the present invention is similarly applied to various facilities for transporting suspended matter using a water-sealed conveyor. It can be done.

1 ... Water-sealed ash-out conveyor device 2 ... Water-sealed casing 3 ... Chain conveyor with scraper 4 ... Scraper 5 ... Drive gear 6 ... Driven gear 7 ... Guide bottom plate 8 ...・ ・ Drive motor 9 ・ ・ ・ Bottom ash discharge chute 10 ・ ・ ・ Unburnable material discharge chute 11, 12, 13 ・ ・ ・ Inspection window 14 ・ ・ ・ Fluid injection nozzle 15 ・ ・ ・ Support stand 16 ・ ・ ・ Water seal Water (cooling water)
17 ... Bubbles 20 ... Incinerator 21 ... Furnace bottom hopper 22 ... Incinerator ash (including unburned material)
23 ... Compressor 24 ... Reservoir tank 25 ... Valve 26 ... Incinerator ash recovery cart 27 ... Unburned material recovery cart 30 ... Floating unburned material

Claims (6)

A water-sealed casing (2) in which the lower portion of the bottom hopper (21) of the incinerator (20) is sealed and immersed in cooling water, and the bottom hopper (21) in the water-sealed casing (2). With a scraper (4) spanned between the drive gear (5) provided on one end side of the water-sealed casing (2) and the driven gear (6) provided on the other end side so as to move across the lower part. A water-sealed ash-out conveyor device (1) having a chain conveyor (3) composed of a pair of chains.
The forward side (F) chain (3a) of the chain conveyor (3) is scraped and conveyed to one end side of the water-sealed casing (2) by the scraper (4) as it travels in the forward (F) direction. A bottom ash discharge chute (9) for carrying out the incinerated ash that has settled on the bottom wall of the water-sealed casing (2) to the outside is provided.
The bottom hopper (21) is located below the chain conveyor (3) on the downstream side of the chain conveyor (3) in the traveling direction when viewed from the bottom hopper (21) on the return side (R) of the chain conveyor (3). A guide bottom plate (7) for scraping and transporting the unburned material (30) floating inside the water-sealed casing (2) to the other end side of the water-sealed casing (2) with the scraper (4) is provided.
An unburnable material discharge chute (10) for carrying out the unburned material (30) that has been lifted and transported to the outside is provided on the other end side of the water-sealed casing (2) .
On the return side (R) of the chain conveyor (3), on the upstream side in the traveling direction of the chain conveyor (3), the unburned material (30) floating in the vicinity of the furnace bottom hopper (21) is placed in water-sealed water. It has a fluid injection nozzle (14) for applying a force in the direction of sedimentation and allowing the water seal portion of the furnace bottom hopper (21) to pass through.
It is characterized in that the scraper (4) and the guide bottom plate (7) facilitate the capture and scraping transfer of the unburned material (30) as the chain conveyor (3) travels in the return direction (R). Water seal ash removal conveyor device. The fluid injected by the fluid injection nozzle (14) is a high-speed air flow, and the unburned material (30) is sealed with water (16) by the pressing force of the high-speed air flow injected from the fluid injection nozzle (14). ) The water-sealed ash removal conveyor device according to claim 1 , wherein the water-sealed ash is pushed into the container. The fluid injected by the fluid injection nozzle (14) is a fine bubble mass, and the unburned material (30) is water-sealed by reducing the buoyancy caused by the decrease in the density of the water-sealed water (16) due to the bubble mass. The water-sealed ash-delivering conveyor device according to claim 1 , wherein the fluid is submerged in water (16). The fluid injected by the fluid injection nozzle (14) is a high-pressure water stream, and the unburned material (30) is pushed into the water-sealed water (16) by the pressing force of the high - pressure water stream. The water-sealed ash removal conveyor device described in 1. The front end region of the guide bottom plate (7) on the furnace bottom hopper (21) side is submerged in the water-sealed water (16), and the rear end region on the driven gear (6) side is the driven gear (6). ), Which is characterized in that it is installed so as to gradually escape from the water-sealed water (16) substantially in parallel with the chain conveyor ( 3b) on the return side (R) toward the vicinity of). The water-sealed ash-out conveyor device described in the gear. On the other end side of the water-sealed casing (2), in the front end region of the guide bottom plate (7) on the furnace bottom hopper (1) side and the rear end region of the water-sealed casing (2) on the other end side. The water-sealed ash-out conveyor device according to any one of claims 1 to 5 , wherein an inspection window for inspecting the corresponding position and the guide bottom plate (7) is provided.

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