JPH10253025A - Refuse feeding method and refuse feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refuse feeding device provided with a two-shaft screw capable of feeding refuse to an incinerator by biting municipal refuse between the screws definitely without producing a bridge in terms of a non-crush larger municipal refuse. SOLUTION: In terms of refuse feeding of refuse by a two-shaft screw feeder type refuse feeding device provided with a pair of turnable screw shafts 3a and 3b, which feeds combustible refuse to an incinerator, pushing rods 11a, 11b and 11c, which move forward and backward in the spacing direction of the screw shafts 3a and 3b, are arranged to move forward in the direction across screw shafts, thereby preventing the formation of a refuse bridge at the entrance of refuse and promoting the biting of the refuse in the direction across shafts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust supply device for a waste incinerator.

[0002]

2. Description of the Related Art As a facility for incineration of non-crushed large-scale municipal waste, there is a method in which refuse supplied to a refuse hopper is transported by a twin-screw feeder type feeding device, charged into an incinerator and incinerated. is there. In order to eliminate a bridge formed by dust in the twin-screw structure dusting apparatus, JP-A-59-173625 discloses that
There is described a dust feeding device that eliminates a bridge by moving a screw that can be moved by a signal from a bridge detection unit to a predetermined position so as to increase the distance between the two screws.

[0003]

In the above-described twin screw feeder type dust feeding apparatus, even if the distance between the two screws is increased, the refuse bridged at the inlet of the feeding apparatus easily falls into the dust feeding apparatus. Therefore, simply increasing the distance between the two screws does not result in reliable bridge elimination.

[0004] Further, in order to make large municipal solid waste and the like bite between the two screws, the larger the distance between the screws, the larger the size of the dusting device must be increased, which is not practical. Naturally, the distance between screws is limited.

[0005] The present invention provides a dust feeder provided with a twin-screw capable of feeding crushed large-sized municipal solid waste to an incinerator without causing bridges, and for ensuring that municipal solid waste is trapped between the screws. Is provided.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a method of supplying waste by a twin-screw feeder-type duster having a pair of rotatable screw shafts for feeding municipal waste to an incinerator. On both sides and the rear surface of the chute at the dust inlet of the dust feeding device, push rods that move forward and backward in the direction of the screw shaft are simultaneously advanced in the direction between the screw shafts to prevent the formation of a dust bridge at the dust inlet. It is characterized by promoting the intrusion of dust between the screw shafts.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view of a dust feeding apparatus having a pair of parallel screw shafts according to the present invention as viewed from above, and FIG. 2 is a dust feeding apparatus having a pair of parallel screw shafts of the present invention. It is the schematic which looked at the apparatus from the side.

[0008] A pair of screw shafts 3a, 3b are rotatably provided in the housing 2 of the dust feeding device 1 in a rotatable manner parallel to the dust transfer direction, and the respective screw shafts 3a, 3b are twisted in opposite directions. Screw blade 4
a and 4b. One of the two screw shafts 3a and 3b is fixed, and the other screw shaft 3b is movable so that the distance between the pair of screw shafts can be increased.

The drive sources of the screw shafts 3a and 3b are provided with a detector (not shown) for detecting a load current value.

A dust inlet 7 is formed at an upper portion of one end of the housing 2 of the dust feeding device 1 and communicates with a chute 6 of a dust injecting hopper 5, and the other end is connected to a dust incinerator through an incinerator. 8 are formed.

Pusher devices 12a, 12b, 12c having push rods 11a, 11b, 11c attached to both sides 9a, 9b and a rear surface 10 of the lower part of the chute 6 of the refuse input hopper 5 at the refuse inlet 7 are provided. The direction of movement of each push rod 11a, 11b, 11c is shown in FIG.
2, as shown in FIG. 2, the axes of the push rods 11a, 11b, 11c intersect with the intersection of the vertical line passing through substantially the center of the dust inlet 7 and the plane including the upper edges of the pair of screw shafts 3a, 3b. Orientation is preferred.

Next, a description will be given of a method of operating a dust feeding apparatus having a pair of screw shafts in parallel according to the present invention.

The refuse introduced from the refuse hopper 5 is supplied through the chute 6 from the refuse entrance 7 of the dust feeding device 1 between the screw shafts 3a and 3b, and is transferred by the rotation of the screw blades 4a and 4b. , From the refuse supply port 8 into the incinerator.

In order to prevent a dust bridge from being formed at the dust inlet 7 during dusting, each pusher device 12 is provided.
The push rods 11a, 11b, 11c are operated periodically, for example, at intervals of 30 seconds.
At the same time in the direction between the screw shafts 3a and 3b,
While preventing the formation of refuse bridges at the refuse entrance 7,
It promotes intrusion of dust between the screw shafts 3a and 3b.

During dust feeding, the load current value of the drive source of the screw shafts 3a and 3b is detected, and when the load current value decreases and becomes a no-load current value, a dust bridge is formed. By operating the pusher devices 12a, 12b, and 12c to simultaneously advance the push rods 11a, 11b, and 11c, the dust bridge is eliminated.

When the load current value of the screw shafts 3a, 3b rises beyond the normal load current value and reaches the set load current value, each push rod 11a, 11b, 1
1c is retracted, the distance between the screw shafts 3a, 3b is increased, and the ingress of dust is promoted.

[0017]

【The invention's effect】

(1) Since the pusher devices 12a, 12b, and 12c are operated to simultaneously advance the push rods 11a, 11b, and 11c to prevent formation of a refuse bridge, stable refuse can be supplied, and as a result, stable refuse can be supplied. Can be incinerated.

(2) As a method for feeding non-crushed municipal waste, the above-mentioned pusher device and the movement of the screw shaft make it possible to supply a fixed amount of dust that is equal to or greater than that of a stalker furnace.

[Brief description of the drawings]

FIG. 1 is a schematic view of a dust feeding apparatus having a pair of screw shafts in parallel according to the present invention as viewed from above.

FIG. 2 is a schematic side view of a dust feeding apparatus having a pair of screw shafts in parallel according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dust supply apparatus 2 Housing 3a, 3b Screw shaft 4a, 4b Screw blade 5 Garbage input hopper 6 Chute 7 Garbage inlet part 8 Garbage supply port 9a, 9b Side surface 10 Rear surface 11a, 11b, 11c Push rod 12a, 12b, 12c Pusher device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Katsunori Wakamatsu, Inventor 46-59, Nakahara, Tobata-ku, Kitakyushu Nippon Steel Corporation Machinery & Plant Division (72) Inventor, Toru Izumiya 46-59, Nakahara, Tobata-ku, Kitakyushu Nippon Steel Corporation Machinery & Plant Division

Claims (5)

[Claims] 1. A waste feeding method using a twin screw feeder type dust feeding apparatus having a pair of rotatable screw shafts for feeding combustible waste to an incinerator, wherein a waste inlet of the dust feeding apparatus is provided. On both sides and the rear side of the chute of the part, push rods that move forward and backward in the direction of the spacing of the screw shafts are simultaneously advanced in the direction between the screw shafts, to prevent the formation of a dust bridge at the dust inlet, and A method of supplying waste, characterized by promoting refuse entrapment. 2. The method for feeding waste according to claim 1, wherein the push rod is moved forward and backward periodically. 3. The waste supply according to claim 1, wherein a load current value of a drive source of the screw shaft is detected, and forward and backward movement of each push rod is controlled based on the detected load current value. Dust method. 4. A two-screw feeder-type duster provided with a pair of rotatable screw shafts for feeding combustible waste to an incinerator, both sides of a chute at a dust inlet portion of the duster. A duster provided with a pair of screw shafts, on the rear surface of which a pusher device having a push rod that moves forward and backward in the interval direction of the screw shafts is disposed. 5. The pair of screw shafts according to claim 4, wherein one of the pair of screw shafts is provided so as to be movable so that the distance between the pair of screw shafts can be increased. Dust feeding device equipped with.