JPH07112139A - Refuse supplying device and refuse supplying method - Google Patents

Abstract

PURPOSE:To eliminate the central concn. of refuse, to avert an overloading state and to stably crush and discharge the refuse by using a part of screw vanes as cutting blades and providing the inside surface of a casing opposite to these cutting blades with stationary blades at a prescribed spacing from the cutting blades. CONSTITUTION:A part of the screw vanes 4a, 4b of screw shafts 2a, 2b of twin screws of this refuse supplying device are formed as the cutting blades 6 having twist angle larger than the twist angle of the screw vanes 4a, 4b. The inside wall of the casing 8 facing these cutting blades 6 is provided with the stationary blades 7 for crushing the refuse by the interaction with the cutting blades 6. The two screws are rotated respectively relatively outerward to crush the refuse by the cutting blades 6 and the stationary blades 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste supply device and a waste supply method, and particularly to a waste supply for crushing a predetermined amount of combustible material in an incinerator, an industrial waste treatment facility, etc. and supplying it to an incinerator. The present invention relates to an apparatus and a supply method.

[0002]

2. Description of the Related Art FIG. 9 is an explanatory view of a general refuse incineration facility. This garbage incineration facility is equipped with a garbage truck 11.
, A garbage pit 12 that stores the garbage collected by the garbage collection vehicle 11, a crane 13 that carries out the garbage stored in the garbage pit 12, a waste that is carried out by the crane 13, and a supply destination 10
And the waste discharged from the waste supply device 10 in an incinerator 1
It is mainly composed of a conveyor 14 that conveys the sheet to the conveyor 5. For example, the municipal waste A collected by the garbage truck 11 and stored in the garbage pit 12 is put into the garbage feeder 10 by the crane 13 and is discharged from the garbage feeder 10 by a predetermined amount, and the downstream conveyor 14 is provided. After that, it flows into the incinerator 15 and is incinerated.

In such a refuse incineration facility, it is preferable that the refuse is crushed as finely as possible in terms of transportation and combustion management. Therefore, in the past, a crusher was often installed side by side in the upstream or downstream of the waste feeder 10. In addition, recently, due to reasons such as space saving and operation management requirements, a waste supply device having both a constant supply function and a crushing function has been developed.

FIG. 4 is an explanatory view of a conventional refuse supply device having both a fixed amount supply function and a crushing function, FIG. 5 is an explanatory view showing the biaxial screw of FIG. 4, and FIG. 6 is a VI- of FIG. FIG. 6 is a sectional view taken along line VI. In FIG. 4, this dust feeding device is provided with a hopper 1 for receiving dust, a twin screw 2 arranged in a casing 8 below the hopper 1, and a constant twist angle provided on the twin screw 2. Of the continuous screw blade 4 and the casing 8 covering the biaxial screw 2
And a dust discharge port 5 provided in the casing 8 and a motor 3 for rotationally driving the biaxial screw 2. In FIG. 5, the biaxial screw has screw blades 4a and 4b having the same twist angle (same pitch).

In such a structure, for example, the municipal waste A supplied to the hopper 1 is relatively inward, that is, the screw shaft 2 rotating in the opposite direction (opposite direction) to each other.
Crushing due to the interaction between the screw blades 4a of the screw shaft 2a rotating at a low speed and the screw blades 4b of the screw shaft 2b rotating at a high speed,
After being crushed by being subjected to compression, tearing, etc., it is discharged through the waste discharge port 5 in a fixed amount to the destination.

Further, FIG. 7 is an explanatory view of a biaxial screw portion of a waste feeding device showing another conventional technique, and FIG. 8 is a V of FIG.
FIG. 7 is a sectional view taken along the line III-VIII in the direction of the arrow. In FIG. 7, the two screw shafts 2a and 2b have screw blades 4a and 4b having different twist angles (different pitches), respectively. The municipal solid waste A received by the hopper 1 falls between the screw shafts 2a and 2b as in the case of the above-described conventional technique, and for example, the screw shafts 2a rotate inward at the same rotation speed.
Screw blade 4a and screw blade 4 of screw shaft 2b
After being crushed by the interaction of b, it is quantitatively discharged from the waste discharge port 5 to the supply destination.

[0007] However, such a conventional dust-supplying device may be dangerous because a large compressive force is generated at the time of crushing the dust that the screw blades 4a and 4b pass each other, resulting in overload. In addition, the screw blades 4a and 4
Since both b are operating, a sufficient crushing effect cannot be obtained, and development of a device having a higher crushing effect has been desired.

[0008]

DISCLOSURE OF THE INVENTION The object of the present invention is to solve the above-mentioned problems of the prior art, to improve the crushing efficiency without overloading, and to have a fixed quantity feeding function. An object is to provide a supply device and a waste supply method using the same.

[0009]

In order to achieve the above object, the present invention provides a part of a screw blade provided on a biaxial screw of a dust supply device with a twist angle larger than that of the screw blade. As a cutting blade having, using a dust supply device provided with a fixed blade for crushing dust by interaction with the cutting blade on the casing inner wall facing the cutting blade,
The biaxial screw is relatively rotated outwardly to crush dust with the cutting blade and the fixed blade.

That is, the invention claimed in the present application is as follows. (1) A casing having a hopper for receiving dust and a discharge port for discharging the dust to a destination, a biaxial screw provided below the hopper in the casing, and a screw having a constant twist angle provided on the biaxial screw. In a refuse supply device having a blade and a rotating means of a biaxial screw for rotating the screw blade together with the screw, a part of the screw blade having the constant twist angle has a twist angle larger than the twist angle of the screw blade. A refuse supply device comprising a cutting blade, and a fixed blade fixed to the cutting blade at a predetermined distance from the inner wall of the casing facing the cutting blade. (2) The waste received in the hopper is located below the hopper.
In a waste supply method using a waste supply device, in which a twin-screw provided in a casing is rotated and crushed between screw blades having a constant twist angle and discharged to a destination, the two-screw screws are opposed to each other. Rotated in the lateral direction, provided on a part of the screw blade of the constant screw angle of the biaxial screw, a cutting blade having a larger helix angle than the screw blade, and on the inner wall of the casing facing the cutting blade, A dust feeding method using a dust feeding device, characterized in that the dust is crushed by the cutting blade and a fixed blade fixed at a predetermined interval.

[0011]

A casing of a biaxial screw, in which a part of a screw blade having a constant helix angle provided on the biaxial screw is used as a cutting blade having a helix angle larger than the helix angle of the screw blade, and which faces the cutting blade. Since the inner blade is provided with a fixed blade fixed to the cutting blade at a predetermined interval, when the biaxial screws are respectively rotated relatively outward (opposite side), dust introduced from the hopper Is moved between the screw blade and the casing in accordance with the rotation of the screw shaft, where the cutting blade provided on the screw blade and the fixed blade fixed to the casing interact with each other to efficiently compress, Sheared and crushed. The amount of dust discharged is controlled by adjusting the rotation speed of the twin screw.

According to the present invention, by rotating the biaxial screws in the opposite direction (outside) to the screws which are respectively adjacent to each other, the central concentration of dust can be avoided and the dust loosening effect can be obtained. It can be lost. Further, the crushing efficiency is improved by crushing the dust with the rotating cutting blade and the fixed blade fixed. In the present invention, a plurality of cutting blades provided on the screw blades and having a larger twist angle than the screw blades are provided at predetermined intervals in the continuous screw blades having the constant twist angle, and the screw blades and the cutting blades are provided. Are preferably integrated. The interval between the cutting blades is determined in consideration of the kind and size of the crushed dust.

In the present invention, the gap between the fixed blade fixed to the inner wall of the casing and the cutting blade provided integrally with the screw blade is determined by the type and size of the object to be treated. Generally, when applied to an incineration treatment facility for municipal solid waste, it is preferably about 20 to 30 mm. INDUSTRIAL APPLICABILITY The waste supply device of the present invention is preferably used in a municipal waste incineration facility, an industrial waste treatment facility, a resource recovery facility, a sewerage residue supply facility, and the like.

[0014]

EXAMPLES Next, the present invention will be described in more detail by way of examples. FIG. 1 is an explanatory view showing a biaxial screw portion of a refuse feeding device according to an embodiment of the present invention, and FIG. 2 is a II- of FIG.
FIG. 3 is a partial detailed view of FIG. 1, taken along the line II. In the figure, a part of the screw blades 4a and 4b provided on the screw shafts 2a and 2b of the biaxial screw serves as a cutting blade 6 having a helix angle larger than that of the screw blade. The cutting blade 6 is, for example, 2 per circle with respect to the screw shaft 2 of the screw blade 4.
It is provided individually. A fixed blade 7 is fixed to the inner wall of the casing 8 facing the cutting blade 6, and the gap between the cutting blade 6 and the fixed blade 7 is, for example, 20 to 30 mm. A hopper, a dust discharge port, a motor, etc., which are not shown, operate in the same manner as in the above-described conventional technique.

In such a structure, for example, municipal waste A received by the hopper is screw shafts 2a, 2b which rotate relatively outward, that is, in directions opposite to each other.
A fixed blade 7 fixed to the casing 8 and a cutting blade 6 provided as a part of the screw blades 4a and 4b. Crushed by the interaction of
After being crushed and made finer, it is discharged through the waste discharge port 5 in a fixed amount to the destination. The supply amount is controlled by the rotation speed of the motor 3.

According to this embodiment, a part of the screw blade 4 of the biaxial screw 2 is a cutting blade 6 having a helix angle larger than the helix angle of the screw blade 4, and a casing 8 facing the cutting blade 6 is provided. By providing the fixed blade 7 which is separated from the cutting blade 6 by a predetermined distance on the inner wall of the machine, dust can be crushed by the rotary blade and the fixed blade, so that the crushing efficiency is improved and the quantitative transportation of the dust is also performed. There is no loss of functionality. Further, by rotating the biaxial screw relatively outward, the concentration of dust in the center can be eliminated and the dust can be appropriately loosened, so that an overload state can be avoided, and stable crushing and constant discharge can be performed.

In the present embodiment, for example, two cutting blades 6 are provided for each circumference of the screw blade 4 with respect to the screw shaft 2, but the present invention is not limited to this. next,
Specific examples of the present invention will be described. Example 1 Using the apparatus shown in FIG. 1 to FIG. 3, a two-screw screw is rotated at a relative rotation speed of 2 rpm, a motor power is 11 kw, and a waste discharge amount is 2 t / hr. When a fixed amount of municipal solid waste was supplied to the incinerator, the crushability of the solid waste was extremely good, and only 10% or less of the whole waste was discharged as a bag. Further, the current value of the motor was almost the same as that when the conventional device was used, and it was possible to stably supply the current without overloading.

Comparative Example 1 The same treatment as in Example 1 was performed, except that a conventional refuse feeding device having neither a cutting blade nor a fixed blade was used and the biaxial screw was rotated relatively inward. The crushing efficiency of the waste was low, and 30% to 50% of the whole waste was discharged without being crushed as a bag.

[0019]

According to the first aspect of the present invention, a part of the screw blade is used as a cutting blade, and a fixed blade fixed to the inner wall of the casing facing the cutting blade with the cutting blade at a predetermined interval. With the provision, dust can be efficiently crushed by the interaction between the cutting blade and the fixed blade and stably discharged in a fixed amount.

According to the invention of claim 2 of the present application, by rotating the biaxial screw relatively outward, the central concentration of dust is eliminated, an overload state is avoided, and dust is crushed stably. It can be discharged in a fixed amount.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a biaxial screw portion of a refuse supply device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a partial detailed view of FIG.

FIG. 4 is an explanatory view of a conventional refuse supply device.

FIG. 5 is an explanatory view showing a biaxial screw according to a conventional technique.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is an explanatory diagram showing another conventional technique.

8 is a sectional view taken along line VIII-VIII in FIG.

FIG. 9 is an explanatory diagram of a general waste processing facility.

[Explanation of sign]

1 ... Hopper, 2 ... Screw, 2a, 2b ... Screw shaft,
3 ... Motor, 4 (4a, 4b) ... Screw blade, 5 ... Discharge port, 6 ... Cutting blade, 7 ... Fixed blade, 8 ... Casing, 10
… Garbage feeder, 11… Garbage truck, 12… Pit, 13
… Crane, 14… Conveyor, 15… Incinerator.

Claims (2)

[Claims] 1. A casing having a hopper for receiving dust and a discharge port for discharging it to a destination, a biaxial screw provided below the hopper in the casing, and a constant twist angle provided on the biaxial screw. In the waste feeding device having a screw blade and a rotating means of a biaxial screw for rotating the screw blade together with the screw, a part of the screw blade having a constant twist angle is provided with a twist angle larger than the twist angle of the screw blade. A cutting blade having
A refuse supply device characterized in that a fixed blade fixed to the cutting blade at a predetermined interval is provided on the inner wall of the casing facing the cutting blade. 2. The dust received in the hopper is crushed between screw blades having a constant twist angle by rotating a biaxial screw provided in the casing below the hopper, and discharged to a destination. In a dust feeding method using a feeding device, each of the biaxial screws is rotated in the opposite direction, and a twist angle larger than that of the screw blades provided in a part of the screw blades with a constant twist angle of the biaxial screw. And a cutting blade having a cutting blade and an inner wall of the casing facing the cutting blade, and a fixed blade fixed at a predetermined interval from the cutting blade to crush the dust, and a waste supply device using the waste supply device. Method.