JP2006068655A - Quantitative feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a quantitative feeding device capable of preventing the residence of a material to be transported due to a bridge phenomenon and an attrition with a side-wall surface of a storage tank, and stably and effectively feeding the material to be transported such as a pulverized waste and powder quantitatively. <P>SOLUTION: This quantitative feeding device has the storage tank having a throwing opening at its upper part, a belt conveyer arranged at a lower part of the storage tank, and a discharging part arranged under an end part of the belt conveyer, wherein a distance between both side-wall surfaces is enlarged in a fan shape from a side of the throwing opening towards a side of the discharging part while vertically structuring a rear-wall surface and both the side-wall surfaces of the inner part of the storage tank. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for quantitatively supplying crushed waste, powder and the like. The quantitative supply device of the present invention can be suitably used as a quantitative supply device in a device that crushes waste such as paper, wood, plastic and the like into a solid fuel.

  Conventionally, waste such as paper, wood, and plastic is crushed by a crusher, stored in a raw material hopper (storage tank), and crushed waste is quantitatively supplied by a screw conveyor or belt conveyor, and then kneaded and compressed by a molding machine. Thereafter, a method of extruding to form a solid fuel is known. However, when the crushed waste is quantitatively supplied from the storage tank to the molding machine by the screw conveyor, the bridge (shelf hanging) phenomenon occurs because the specific gravity of the raw material waste is relatively small, and the waste is stored in the storage tank. In other words, the screw conveyor does not fall and the screw conveyor is idle, and the raw material waste is not supplied to the molding machine in a fixed amount. In addition, when the crushed waste is directly supplied from the crusher to the molding machine by a belt conveyor or the like, the supply amount of raw material waste becomes unstable and the target solid fuel cannot be produced efficiently. was there.

  A fixed amount supply device in which a belt conveyor is disposed in a storage tank is also known (see, for example, Patent Document 1). In such a fixed amount supply device, a slope in which the inner wall surface of the storage tank is narrowed downward. Therefore, there is a problem that friction is generated between the side wall surface of the storage tank and the object to be transported by the belt conveyor, and the belt conveyor is idle and the transported object cannot be stably supplied in a fixed quantity. It was.

JP-A-9-165589

  The present invention solves these problems of the prior art, prevents bridging of the transported material and stays due to friction with the side wall of the storage tank, and stabilizes the transported material such as crushed waste and powder. It is an object of the present invention to provide a quantitative supply device that can efficiently and quantitatively supply.

  As a result of intensive studies, the present inventors have configured the rear wall surface and both side wall surfaces inside the storage tank vertically, and by expanding the interval between the both side wall surfaces from the inlet side toward the discharge part side in a divergent form, The present invention has been completed by finding that the problems can be solved.

That is, the present invention employs the following configurations 1 to 4.
1. In a fixed amount supply device having a storage tank having an inlet at the top, a belt conveyor provided at the bottom of the storage tank, and a discharge part provided below the end of the belt conveyor, the rear wall and both side walls inside the storage tank are vertically The fixed-quantity supply apparatus characterized by having expanded the space | interval of a both-sides wall surface toward the discharge | emission part side from the inlet port side.
2. An opening was provided below the central part of the discharge part, and a screw shaft without rotating blades was arranged in the central part with rotating blades opposite to each other from both ends toward the central part over the entire width of the discharge part. 2. The quantitative supply device according to 1, which is characterized.
3. 3. The quantitative supply device according to 2, wherein a distribution plate that distributes the object to be conveyed in the direction of both ends of the screw shaft is provided above the central portion of the screw shaft.
4). 3. The quantitative supply device according to 3, wherein the distribution plate is configured by a plate-like body having inclined surfaces in the direction of both ends of the screw shaft so as to cover a portion of the screw shaft central portion that does not have the rotary blade.

The quantitative supply device of the present invention prevents the retention of the transported object such as crushed waste and powder and the retention due to the friction with the side wall of the storage tank, and stably and efficiently supplies the transported object. be able to.
In particular, a screw shaft that has a rotating blade in the opposite direction in the discharge portion and that does not have a rotating blade in the central portion is arranged, and a distribution plate that distributes the object to be conveyed in the direction of both ends of the screw shaft at the upper central portion of the screw shaft. By providing it, the object to be transported is uniformly stabilized by the screw shaft, and it becomes possible to supply a quantity more stably.

Next, the quantitative supply device of the present invention will be described with reference to the drawings, but the following specific examples do not limit the present invention.
1 to 3 are diagrams showing an example in which the present invention is applied to a waste quantitative supply device, in which FIG. 1 is a schematic sectional view of the device, FIG. 2 is a schematic sectional view taken along line XX in FIG. 3 is a schematic cross-sectional view taken along line YY in FIG.

  The fixed amount supply device 1 includes a crushing waste input port 2, a storage tank 3, a belt conveyor 6 that circulates between the belt wheels 4 and 5 at a lower portion of the storage tank 3, and a lower end of the belt conveyor 6. It has the discharge part 7 provided.

  An opening 8 serving as a discharge port is provided below the center of the discharge unit 7, and rotary blades 11, 11 that are opposite to each other from the both ends toward the center over the entire length in the width direction of the discharge unit 7. A screw shaft 12 that does not have a rotary blade is disposed, and this screw shaft 12 is connected to a motor 13. The opening 8 can be connected to a molding apparatus that compresses the crushed waste, solidifies the volume, and forms the solid fuel.

A distribution plate 15 is provided above the central portion of the screw shaft 12 so as to cover a portion of the central portion of the screw shaft 12 that does not have a rotary blade. The distribution plate 15 is installed so that an inclined surface is formed in the direction of both ends of the screw shaft 12 by bending a rectangular plate-like body made of a rigid material such as metal or plastic at the center.
By providing such a distribution plate 15, the crushed waste 9 sent to the discharge unit 8 by the belt conveyor 6 is distributed to both ends of the screw shaft 12, and rotated by rotating blades 11, 11 opposite to each other. It is transferred to the central part of the discharge part 7 while being uniformed and discharged from the opening 8. Therefore, since the properties of the waste 9 crushed by the screw shaft 12 are made uniform, it becomes possible to supply the waste 9 more stably and quantitatively.

In the storage tank 3 of the quantitative supply device 1, the rear wall surface 21 and the side wall surfaces 22 and 23 are configured vertically. Moreover, it is comprised so that the space | interval W of the both-side wall surfaces 22 and 23 may be expanded so that it may spread toward the discharge part 7 side from the insertion port 2 side (refer FIG. 2). The angle of the end spread can be selected as appropriate.
By configuring the inner wall surface of the storage tank 3 in this way, the bridging phenomenon of crushed waste, which is a problem in the quantitative supply device in which the inner wall surface of the conventional storage tank is squeezed downward, or waste It is possible to prevent stagnation due to friction between the container and the side wall surface of the storage tank, and to stably supply a fixed amount of waste.

There is no restriction | limiting in particular as the belt conveyor 6 provided in the lower part of the storage tank 3, All the belt conveyors normally used for a fixed_quantity | feed_rate supply apparatus can be used, and properties, such as the crushed waste thrown into a fixed_quantity | quantitative supply apparatus. Can be selected.
For example, a sheet-like endless belt can be used when the thrown-in waste is light, such as paper, and a large number of plates made of a rigid material can be used when the waste is relatively heavy. It is possible to use a belt in which the members are arranged and connected in the width direction of the belt.

  In this constant supply device 1, the belt wheel 5 on the discharge portion 7 side is connected to the motor 14, and the belt wheel 4 on the inlet side is rotatably supported on the side wall of the device main body. In addition, it goes without saying that the design can be changed as appropriate, for example, by connecting the belt pulley 4 on the inlet side to a motor. Further, the belt conveyor 6 can be held by a holding roller (not shown).

  The size and shape of the quantitative supply device of the present invention can be arbitrarily selected according to the size of the site where the device is installed, the processing amount, and the like. When used as a standard waste quantitative supply device, for example, the storage tank 3 has a width (maximum width on the discharge unit 7 side) of 150 to 300 cm, a length of 300 to 500 cm, and a height of 150 to 300 cm. It can be a rectangular parallelepiped of about 300 cm. As a material constituting the apparatus, usual materials such as iron and stainless steel are used. The dimensions of the belt conveyor 6 and the belt wheels 4 and 5 can be selected according to the dimensions of the apparatus.

The quantitative supply device of the present invention is suitably used for an apparatus (plant) for crushing waste such as paper, wood, plastic, etc., and producing solid fuel. FIG. 4 is a schematic diagram showing an example of a production process in such a solid fuel production apparatus.
Wastes such as paper, wood, and plastics are crushed to a size of about 10 to 50 mm by a crushing apparatus after sorting out substances that may generate harmful substances such as chlorine-containing plastics if necessary. The crushed waste is sent to the fixed amount supply device of the present invention, and a fixed amount is stably supplied from the fixed amount supply device to the molding device, and after being kneaded and compressed by the molding device, the solid fuel is obtained by extrusion molding. It becomes.

As the molding device, a known device such as a twin-screw type volume reduction molding machine equipped with a heating means can be used, but by using the above-described quantitative supply device, the molding device has a certain amount. Waste is supplied stably. Therefore, it becomes very easy to control the operating conditions in the molding apparatus, and solid fuel can be produced at a lower temperature (heater temperature 120 to 150 ° C.) than the conventional molding temperature (heater temperature 180 to 200 ° C.). It is possible to significantly reduce power and reduce costs. Further, by molding at a low temperature, it is possible to prevent melting or gasification of plastics or the like and obtain a solid fuel having stable properties.
Needless to say, the quantified supply device of the present invention can be appropriately modified such as supplying crushed waste to a plurality of molding devices.

  In the above example, the example in which the present invention is applied to the waste quantitative supply apparatus has been described. However, the present invention is not limited to the waste quantitative supply apparatus, and other powders, granules, and the like are quantitatively determined. It goes without saying that it can be used as a feeding device.

It is a cross-sectional schematic diagram which shows one example which applied this invention to the fixed quantity supply apparatus of the waste. It is a cross-sectional schematic diagram in the XX line of FIG. It is a cross-sectional schematic diagram in the YY line | wire of FIG. It is a schematic diagram which shows the process which manufactures solid fuel from a waste material using the fixed supply apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed supply apparatus 2 Input port 3 Storage tank 4, 5 Belt wheel 6 Belt conveyor 7 Discharge part 8 Opening 9 Waste 11 Rotating blade 12 Screw shaft 13, 14 Motor 15 Distribution board 21 Rear wall surface 22, 23 Side wall surface

Claims (4)

  In a fixed amount supply device having a storage tank having an inlet at the top, a belt conveyor provided at the bottom of the storage tank, and a discharge part provided below the end of the belt conveyor, the rear wall and both side walls inside the storage tank are vertically The fixed-quantity supply apparatus characterized by having expanded the space | interval of a both-sides wall surface toward the discharge | emission part side from the inlet port side.   An opening was provided below the central part of the discharge part, and a screw shaft without rotating blades was arranged in the central part with rotating blades opposite to each other from both ends toward the central part over the entire width of the discharge part. The fixed-quantity supply apparatus of Claim 1 characterized by the above-mentioned.   3. The quantitative supply device according to claim 2, wherein a distribution plate that distributes the object to be conveyed in the direction of both ends of the screw shaft is provided above the central portion of the screw shaft. 4. The quantitative supply device according to claim 3, wherein the distribution plate is configured by a plate-like body having inclined surfaces in the direction of both ends of the screw shaft so as to cover a portion of the screw shaft central portion that does not have the rotary blade. .