JPS6138320A - Device to separate noncombustible substance for refuse incinerator of fluidized bed type - Google Patents

Abstract

PURPOSE:To build a low cost refuse incinerator which produces little vibration and powdery dust during driving, and is not necessary to provide another space for a separator independently, by providing a drain outlet for fluidizeing medium under a sifter and by providing a discharge outlet for noncombustible substance under the opening of a sifter. CONSTITUTION:A sifter 11 is housed in a casing 13, and a drain outlet 14 for fluidizing medium is provided under the sifter 11, while a discharge port 15 for uncombustible substance is provided under the opening of a sifter 11, respectively. A fluidizing medium containing noncombustible substance, transferred by a screw conveyer 4, is fed into the sifter 11. It is dripped and drained from the drain outlet 14 by the rotating movement of a sifter 11, while uncombustible substance is transferred up to the opening 11a of a sifter 11 by a feed vane 12, and is discharged from the discharge port 15 for noncombustible substance. Because an noncombustible substance separating function is provided to a drain section for luidizing medium containing uncombustible substance, it is not necessary to provide another space for a separator independently, so that the space for it can be utilized effectively, and an incinerator itself can be manufactured at lower cost. Usually, a separator has a factor to make the working circumstances worse by noise, vibration and dust, but in this case, a separator to cope with those infl uences can be omitted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a non-combustible material separation device for a fluidized bed waste incinerator that separates non-combustible materials and a fluidized medium in a fluidized bed waste incinerator.

[Prior Art] Fluidized bed incinerators, in which a fluidized medium, such as sand, is fluidized by an air stream, and incinerated materials, such as municipal waste, are thrown into the fluidized sand and incinerated, have good thermal efficiency and are widely used. .

By the way, municipal waste contains miscellaneous non-combustible materials such as bottles and cans, and it is necessary to separate the fluid medium containing such non-combustible materials into the non-combustible materials and the fluid medium.

For this separation, according to the conventional technology, a fluidized medium containing incombustibles is extracted from the bottom of the furnace using a screw conveyor, etc., and then separated into noncombustibles and a fluidized medium by a sorting device such as a vibrating sieve. I try to reuse it. For this reason, a space is required to place the sorting device, and the sorting device must be provided separately, which increases the cost of the device.Furthermore, the sorting device generally produces a lot of noise and dust, which often has a negative impact on the environment in the factory.

[Object of the Invention] The present invention was made in order to eliminate the above-mentioned drawbacks of the incombustible material separation device of the conventional fluidized bed type waste incinerator, and its purpose is to eliminate the need to provide a separate space for the sorting device. It is an object of the present invention to provide a non-combustible material separation device for a fluidized bed type waste incinerator that has no problems with driving, vibration, and dust generation, and can be manufactured at a relatively low cost.

``Structure of the Invention'' Therefore, according to the present invention, in an apparatus for taking out a fluidized medium containing incombustibles from the bottom of a fluidized bed waste incinerator and separating the incombustibles and the fluidized medium, A fluidized bed type garbage that is connected to a screw conveyor for taking out the medium and equipped with a cylindrical sieve, with a discharge port for the fluidized medium under the sieve and a discharge port for incombustibles under the opening of the sieve. An incombustible material separation device for an incinerator is provided.

Further, when carrying out the present invention, it is preferable to provide a feeding blade inside the sieve to send the non-combustibles to the opening of the sieve.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

The fluidized medium containing incombustibles that has been incinerated in the incinerator 1 passes through the under-furnace chute 2 from the bottom of the furnace and falls into the discharge passage 3. A screw conveyor 4 is provided within the discharge passage 3. The screw conveyor 4 consists of a hollow rotating shaft 6 supported by bearings 5.5 and screw blades 7 mounted around the rotating shaft 6, and is rotated by a motor 8 via a chain 9. The under-furnace chute 2 and the discharge passage 3 are water-cooled by a water jacket 10.
Cooling water also flows through the hollow rotating shaft 6. The fluidized medium containing incombustibles that has fallen into the drain passage 3 through the under-furnace chute 2 is conveyed by the screw conveyor 4 to the discharge port 3a. The screw blades 7 stop near the discharge port 3a, and a cylindrical sieve 11 made of a perforated plate or a woven mesh is attached to the rotating shaft 6 concentrically with the rotating shaft 6 so as to rotate integrally therewith. There are feeding blades 12 inside the sieve 11.
is installed. The sieve 11 is covered with a casing 13, and a fluid medium outlet 14 is provided below the sieve 11, and a noncombustible material outlet 15 is provided below the opening of the sieve 11. The fluid medium containing incombustibles conveyed by the screw conveyor 4 enters the sieve 11, and as the sieve 11 rotates, the fluid medium falls and is discharged to the fluid medium discharge port 14. Opening 1 of sieve 11
1a and is discharged from the incombustible material discharge port 15.

[Effects of the Invention] As explained above, in the present invention, since the discharging device for a fluid medium containing incombustibles has a function of sorting out incombustibles, there is no need to separately provide a sorting device, and space can be used extremely effectively. Moreover, the device is also inexpensive. Generally, sorting equipment has many factors that degrade the working environment, such as noise, vibration, and dust, but since such sorting equipment can be omitted, the environment in the workplace can be significantly improved.

[Brief explanation of drawings]

The drawing is a front view showing a part of the incombustible material separation device of the fluidized bed type garbage incinerator according to the embodiment of the present invention in cross section. 1... Incinerator 2... Furnace shoes 1 to 3... Discharge passage 4... Screw conveyor 5... Bearing 6... Rotating shaft 7... Screw blade
8...Motor 9...Chain 10...Water cooling jacket 11...Sieve 12...Feeding blade
13...Casing 14...Fluid medium discharge port 1
5...Incombustible material discharge port

Claims (2)

[Claims] (1) In a device that extracts a fluidized medium containing non-combustibles from the bottom of a fluidized bed waste incinerator and separates the non-combustibles from the fluidized medium, a cylindrical cylinder is connected to a screw conveyor that takes out the fluidized medium containing non-combustibles. A fluidized bed waste incinerator for incombustibles, characterized in that a shaped sieve is attached, a fluidized medium discharge port is provided below the sieve, and a noncombustibles discharge port is provided below the opening of the sieve. Separation device. (2) The non-combustible material separation device for a fluidized bed waste incinerator as set forth in claim 1, further comprising a feed blade provided inside the sieve to send the non-combustible material to the opening of the sieve.