JPH04217707A - Distribution plate of fluidized-bed incinerator - Google Patents

Abstract

PURPOSE:To prevent incombustibles in a fluidized-bed from being retained on a distribution plate 1. CONSTITUTION:The surface of a distribution plate 1 is formed into a plane with a little unevenness, inclined from a feed port 3 of material to be burned toward a discharge port 5, provided with distribution air pipes 9 with nozzles 11 and supported by spring members to give the distribution plate 1 vibration by a vibrator 13.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dispersion plate device for a fluidized bed incinerator, which burns a bed to be burned (fluidized bed) while being fluidized by dispersion air.

0002

2. Description of the Related Art Conventionally, as shown in FIG. 3, a dispersion plate 21 of a fluidized bed type incinerator or combustion furnace has a plurality of air nozzles 22 protruding from the dispersion plate 21, and these air nozzles 22 are connected to a fluidized bed 24. A nozzle hole 23 was formed to eject dispersion air toward the target.

However, when burning objects that are heavy and contain many incombustible materials, the fluidized bed 2 of the air nozzle 22
In order to avoid protrusion into the air nozzles 22 as much as possible, the space between the air nozzles 22 is filled with a casting 25, or the dispersion plate 21 is sloped.

0004

[Problems to be Solved by the Invention] However, with the above-mentioned dispersion plate 21, when incinerating garbage, for example, long metal objects such as wires and nails can easily fall onto the dispersion plate 21 due to a slight force such as static electricity or being caught. In some cases, the core becomes entangled with wires, etc., forming a large lump in the layer, causing the furnace to shut down. Moreover, the casting 25 was worn out as shown by the phantom line due to use, and was not a permanent measure.

[0005] This is because there is a part directly above the air nozzle 22 where the air ejected from the nozzle hole 23 does not hit and is stationary. This is because the fluidized bed no longer flows smoothly.

SUMMARY OF THE INVENTION An object of the present invention is to provide a dispersion plate device for a fluidized bed incinerator that can solve the above problems and prevent stagnation of the fluidized bed.

[0007]

[Means for Solving the Problems] In order to solve the above problems, the present invention provides a dispersion air pipe having a nozzle hole for injecting dispersion air into a fluidized bed, and has a flat surface with few irregularities. A dispersion plate formed in a shape is provided to be inclined downward from the combustion material input port toward the discharge port, and the dispersion plate is integrally formed and supported by an elastic support, and the dispersion plate is vibrated. It is equipped with an excitation device.

[0008]

[Function] According to the above structure, the sliding effect is improved by the flat and inclined dispersion plate, and the vibration is generated by starting the vibration device to vibrate the dispersion plate intermittently or continuously during operation. The conveyance effect seen in feeders etc. is generated to promote the sending out of the fluidized bed, and the non-combustible materials that tend to stay can be effectively sent out.

[0009]

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. 1 is the distribution plate of the waste incinerator 2, and the input port 3
The garbage thrown in is ignited by a starting burner (not shown) at the time of startup, and a fluidized bed 4 is formed on the distribution plate 1 by the dispersion air injected from the distribution plate 1, and the garbage flows backward in the direction of arrow A. The ash is sent, dried and burned, and the combustion ash is discharged from the discharge port 5 by the discharge screw 6.

The dispersion plate 1 has a flat surface with few irregularities, particularly in the feeding direction of the fluidized bed 4, and is inclined downward from the input port 3 toward the discharge port 5. A plurality of distributed air pipes are provided between a first air header 7 provided in the width direction below the front furnace wall and a second air header 8 provided in the width direction in front of the discharge port 5. 9 are connected in the flow direction of the fluidized bed 4 at regular intervals in the width direction, and a floor plate 10 is connected between these dispersion air pipes 9 to close the dispersion plate 1. Further, a large number of nozzle holes 11 are formed in the dispersion air pipe 9 above the floor plate 10 to inject dispersion air toward the fluidized bed 4 . Furthermore, this dispersion plate 1
is integrally formed by the first air header 7, the dispersion air pipe 9, the second air header 8 and the floor plate 10, and the first and second air headers 7, 8 and the dispersion air pipe 9 in the vicinity It is elastically supported by a material (elastic support) 12.

[0011] In front of the first air header 7, a vibration device 13 for vibrating the dispersion plate 1 in the front-rear direction is provided. For example, this vibration device 13 includes a rotary plate 14 that is rotationally driven around a horizontal axis by a motor, a hammer arm 16 whose center portion is rotatably supported via a horizontal pin 15, and a rotary plate 14 that is rotatably driven by a motor around a horizontal axis. A crank rod 17 is rotatably connected between the eccentric position and the upper end of the hammer arm 16, and a hammer head 1 is attached to the lower end of the hammer arm 16 and hits the striking plate 18 of the first air header 7.
9, and the vibration to the dispersion plate 1 by the vibration device 13 is performed, for example, by hammering 10 times/10 seconds several times a day. In addition, if the stagnation is severe, continuous hammering can be performed to constantly vibrate.

According to the above structure, the fluidized bed 4 has a dispersion plate 1
The dispersing air from the nozzle hole 11 stirs and fluidizes the air, burns it, and sends it backward along the dispersing air pipe 9. Since the dispersion plate 1 has few irregularities in the feeding direction and there are no protrusions that can get caught, and the discharge side is tilted downward, the incombustibles in the fluidized bed 4 are smoothly fed without being accumulated, and furthermore, the vibrating device 13 provides intermittent Since the entire distribution plate 1 is vibrated either individually or continuously, the conveyance effect is further enhanced, and even if stagnation occurs, it can be effectively eliminated.

[0013]

Effects of the Invention As described above, according to the present invention, the sliding effect is improved by using the flat and inclined dispersion plate, and furthermore, by starting the vibration device during operation, the dispersion plate is activated intermittently or continuously. By applying vibration, it is possible to generate a conveying effect seen in a vibrating feeder, etc., to promote sending out of the fluidized bed, and to effectively send out noncombustible substances that tend to stay.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a distribution plate.

FIG. 2 is a partial front sectional view of the distribution plate.

FIG. 3 is a side sectional view showing a conventional dispersion plate.

[Explanation of symbols]

1 Dispersion plate 2 Garbage incinerator 3 Input port 4 Fluidized bed 5. Discharge port 7 1st air header 8 Second air header 9 Dispersion air pipe 10 Floorboard 11 Nozzle hole 12 Spring material 13 Vibration device

Claims (1)

[Claims] Claim 1: A dispersion plate having a dispersion air pipe in which a nozzle hole for injecting dispersion air into a fluidized bed and having a flat surface with few irregularities is discharged from a combustion material inlet. A fluidized bed incinerator, characterized in that the dispersion plate is provided to be inclined downward toward the outlet, the dispersion plate is integrally formed and supported by an elastic support, and a vibration device is provided for vibrating the dispersion plate. Dispersion plate device.