JPH09142667A - Screw type refuse feed device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove clogging of a large sized refuse lump. SOLUTION: In a screw type refuse feed device providing a refuse charging hopper 13 on the upper part of the upper stream end of a horizontal trough 11 in which screws 12 for carrying and crushing refuse are rotatably arranged side by side, and connected to a refuse incineration furnace on the lower stream end side of the trough 11, a feed space 21 for large-sized refuse lumps is formed over the screws 12 in the trough 11 extending the whole length, and a gate device 22 in which a gate plate 23 is retreated by a cylinder device 25 for advancing and retreating at clogging of a large-sized refuse lump is provided at the inlet 21a of the feed space 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw type dust incinerator used for a refuse incinerator, for example, a fluidized bed incinerator requiring closed dust.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, for example, as shown in FIG. 5, a screw type dusting apparatus for supplying dust to a fluidized bed incinerator in a hermetically sealed state is to trash the bagged dust in a laterally placed trough 11 and Two screws 12 to be broken are rotatably arranged side by side, a dust input hopper 13 is provided above the upstream end of the trough 11, and a downstream end side of the waste incinerator main body via a casing 14a of the crusher 14 (Fig. Connected (not shown).

[0003] This screw-type dust supply device removes the bagged waste put into the waste input hopper 13 by two screws 1.
While being crushed by the bag 2, it is sent to the crusher 14 while being crushed, further crushed by the screw 14 b in the casing 11 of the crusher 14, and charged into the refuse incinerator main body from the charging duct 15.

[0004]

However, if a large metal lump or the like that cannot be broken by the screw 12 is mixed in the refuse, the refuse is clogged at the inlet 11a of the trough 11 and the supply amount is reduced, and the crushing capacity is reduced. Finally, there was a problem that driving became impossible.

As a means for solving this, conventionally, 2
Although there is a mechanism provided with a mechanism for widening the interval between the screws 12, there is a problem that the whole is complicated, heavy equipment and cost increase. It is also possible to provide a reversing mechanism for the screw shaft 12 to discharge the clogged debris, but at present, it is hardly used because the work to take out is troublesome.

The invention according to claim 1 of the present invention solves the above problems and provides a screw type dust-supplying device capable of easily eliminating clogging of a large lump of dust such as a metal lump with a simple mechanism. With the goal.

[0007]

In order to achieve the above object, the invention according to claim 1 of the present invention is the upper end of the upstream end of a laterally placed trough in which a plurality of conveying and crushing screws are rotatably arranged side by side. In the screw-type dust collector in which a dust input hopper is provided and the downstream end side of the trough is connected to the main body of the refuse incinerator, a feed space for large-sized waste lumps is formed over the entire length of the screw inside the trough. It is characterized in that a gate device that can be opened and closed is provided at the entrance of the feed space.

According to the above construction, when a large lump of dust is clogged at the trough inlet to prevent the dust from being cut out, the gate device is operated to open the inlet, and the lump of dust is fed from the inlet through the feed space. It can be sent out, and the closed state of the dust supply device can be improved.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Here, an embodiment of a screw type dust supply apparatus according to the present invention will be described with reference to FIGS. The same members as those in the related art are denoted by the same reference numerals, and description thereof will be omitted.

Inside the trough 11, above the screw 12, there is formed a feed space 21 for feeding a large-sized refuse, which is formed by raising the ceiling wall 11b by a predetermined height h as compared with the conventional case, over the entire length. A gate device 22 having a gate plate 23 that can freely move in and out is provided at an entrance 21a of the feed space 21 that faces the dust input hopper 13.

In this gate device 22, the gate plate 23 is inclined from the upper side of the rearward flow side to the lower side of the upstream side through a slide hole 24 formed between the ceiling wall 11b and the dust input hopper 13. The entrance / exit cylinder device 25, which is an exiting / retracting device connected to the base end portion, is arranged so as to be freely retractable / retractable along a predetermined inclination angle θ to open / close the inlet 21a. Here, the inclination angle θ is formed by
This is for guiding the refuse to be clogged upward. Even if the feed space 21 is formed, the dust that has passed through the gate plate 23 swells to the feed space 21 side along the back surface of the gate plate 23 immediately after passing, so that sufficient sealing performance is ensured.

A cut-out amount detecting device 26 for detecting the amount of dust fed in the feed space 21 is provided in the middle of the ceiling wall 11b. The cutout amount detecting device 26 is provided on the ceiling wall 1
A cutout portion 27 having a predetermined width and a predetermined length is formed in the middle portion of 1b, and the cutout portion 27 has an upstream end 28a in the transport direction.
A flap 28, which is swingably supported around a horizontal axis, is attached to the feed space 21 via a notch 27 so as to be able to move back and forth. An arcuate seal plate 28b is attached to the downstream end of the flap 28, and a guide plate 27a with which the seal plate 28b is slidably contacted is provided at the downstream end of the cutout portion 27. A biasing member for biasing the flap 28 toward the feed space 21, for example, a coil spring 29 is disposed above the flap 28, and a position detector that detects the amount of withdrawal (oscillation amount) of the flap 28. 30 are provided. Therefore, when the amount of dust sent through the feed space 21 is small, the flap 28 is swung downward by the coil spring 29 and can be detected by the position detector 30.

Further, the screw drive motor 31 for rotationally driving the screw 12 through the speed reducer includes a trough 1
1 is provided with an overload detector 32 for detecting that the rotation of the screw 12 becomes heavy or difficult due to dust clogging.

The detection signals of the cutout amount detection device 27 and the overload detector 32 are input to the cutout control device 33, and the cutout control device 33 operates the switching valve 34 based on at least one of these signals to output the cutout signal. The retreat cylinder device 25 is driven to move the gate plate 23 out and back, and the feed space 2
The first entrance 21a is opened and closed.

In the above structure, when the bag-filled dust is thrown into the dust throwing hopper 13, the screw drive motor 31
Is sent in the transport direction S while being crushed and crushed by the screw 12 rotated in the directions of arrows A and B. As described above, the dust passing below the gate plate 23 expands toward the feed space immediately after passing, thereby ensuring the sealing property. This is also because, depending on the type of dust, dust is entangled with the tip of the gate plate 23 and does not move, and the cross-sectional area of passage of the actual dust is reduced, so that the amount of cutting is reduced. In such a case, by moving the gate plate 23 back and forth a few times, the entanglement of dust can be released and discharged, and the normal state can be restored.

Inlet 11a in which dust or metal is mixed in
When the amount of cut-out of dust is reduced due to clogging, the cut-out amount detector 26 detects a decrease in the amount of conveyed dust. Or
The overload detector 32 detects that the load on the screw drive motor 31 has increased due to the clogged dust. When the detection signal of the cutout amount detector 26 or the overload detector 32 is input to the cutout control device 33, the cutout control device 33.
As a result, the retracting cylinder device 25 is contracted via the switching valve 34, the gate plate 23 is retracted, and the inlet 21a of the feed space 21 is opened. As a result, the clogged waste is sent from the feed space 21 to the crusher 14. When an increase detection signal of the amount of waste conveyed by the cutout amount detector 26 or an overload release signal of the overload detector 32 is input to the cutout control device 33, the cutout control device 33 advances the moving-out cylinder device 25. As a result, the gate plate 23 is projected and the inlet 21a of the feed space 21 is closed. The output operation by the cutout control device 33 is performed by a detection signal of one or both of the cutout amount detector 26 and the overload detector 32. Further, when the clogging of dust is not cleared even if the inlet 21a of the feed space 21 is opened, the two screws 12 are reversely rotated to the outside and then forwardly rotated.
Discharge the clogged waste by repeating the operation repeatedly. If this does not solve the problem, stop the dust supply system and perform an inspection.

According to the first embodiment, the trough 1
Even if there is a case where a lump of dust is clogged in the inlet 11a of the first device 1 and hinders the cut-out, the cylinder device 2 for moving the gate device 22 in and out
By driving 5 to retract the gate plate 23 and open the entrance of the feed space 21, a lump of dust can be sent from the feed space 21, and the closed state of the dust supply device can be easily improved.

Further, since the gate plate 23 is arranged so as to be inclined at an angle of θ ° from the upper side of the downstream side in the direction of transporting the dust to the lower side of the upstream side, it is possible to guide the large lump of dust upward and prevent clogging, and to the gate plate 23. The load on the gate plate 2 can be reduced, and the dust and the gate plate 2 that swell immediately after passing through the gate plate 23.
The contact with 3 can be made close and the sealing property can be improved.

Further, since the gate device 22 is operated and controlled by the cut-out control device 33 based on the detection signals of the cut-out amount detector 26 and / or the overload detector 32, the dust clogging is automatically released. Can be done.

Next, a second embodiment will be described with reference to FIGS. 3 and 4. The same members as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. The second embodiment is intended to prevent the bag breakage and the destruction effect of the dust from being reduced due to the increase in cross section of the feed space 21 after passing through the gate plate 23 of the first embodiment.

That is, on the upper part of the feed space 41, there is provided a movable ceiling wall 42 whose upstream end is rotatably connected to the tip of the gate plate 23. An upper casing 14a of the trough 11 connecting portion of the crusher 14 is provided with a swing wall 43 having an upper end swingably attached, and a lower end portion of the swing wall 43 is connected to a downstream end of the movable ceiling wall 42. It is movably connected. Then, as shown by the solid line in FIG.
Is projected, the movable top wall 42 inclines downward toward the upstream side to narrow the feed space 41 on the inlet side, and when the gate plate 23 is retracted and the inlet 41a is open, the movable top wall 42 becomes horizontal. The feed space 41 is swung to form the feed space 41 having the same cross-sectional area, and the cross section of the feed space 41 is changed.

According to the above construction, in addition to the effect of the first embodiment, in the closed state of the feed space 41 in which the gate plate 23 is projected, the movable ceiling wall 42 is inclined downward toward the upstream side and the inlet side is inclined. Since the feed space 41 can be narrowed, the cross-sectional area of the trough 11 through which the dust passes can be sufficiently narrowed within a predetermined range from the inlet 41a, so that the dust breaking bag and the destruction effect are not reduced.

[0023]

As described above, according to the first aspect of the present invention, when the trough inlet is clogged with a large lump of dust to prevent the dust from being cut out, the gate device is operated to open the inlet. However, it is possible to send out a lump of dust from the inlet through the feed space, and it is possible to improve the closed state of the dust supply device.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of a screw type dust feeder according to the present invention.

FIG. 2 is a sectional view taken along the line II shown in FIG.

FIG. 3 is a vertical cross-sectional view showing a second embodiment of the screw type dust feeder according to the present invention.

4 is a sectional view taken along line II-II shown in FIG.

FIG. 5 is a vertical cross-sectional view showing a conventional screw type dust feeder.

[Explanation of symbols]

 11 Trough 12 Screw 13 Garbage input hopper 14 Crusher 21, 41 Feed space 21a, 41a Inlet 22 Gate device 23 Gate plate 24 Slide hole 25 Exit cylinder device 26 Cutting amount detection device 31 Screw drive motor 32 Overload detector 33 Cutting control device 42 Movable ceiling wall 43 Swing wall

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location F23G 5/50 ZAB F23G 5/50 ZABG

Claims (4)

[Claims] 1. A dust input hopper is provided above an upstream end of a horizontal trough in which a plurality of conveying and crushing screws are rotatably arranged side by side, and a downstream end side of the trough is connected to a refuse incinerator main body. In the screw type dust collector, a feed space for large sized lumps of dust is formed over the entire length of the screw in the trough, and a gate device that can be opened and closed is provided at the entrance of this feed space. apparatus. 2. The gate device is constituted by a gate plate which is arranged so as to be able to move forward and backward from above the downstream side in the direction of waste transport and upstream below the upstream side, and a retracting device which moves this gate plate in and out. The screw type dust feeder according to claim 1. 3. A movable ceiling wall, which is supported at an outlet of the feeding space so as to be vertically swingable and movable in a conveying direction, at a downstream end portion of a ceiling wall of a trough forming the feeding space. 3. The screw type dust collector according to claim 2, wherein the upstream end of the wall is swingably connected to the front end of the gate plate. 4. A gate device is operated to open the entrance of the feed space by at least one of a detection signal of an overload detection device of a screw drive motor and a detection signal of a cutout amount detection device for detecting the amount of dust conveyed in the feed space. The screw type dust feeder according to any one of claims 1 to 3, further comprising a cutting control device that opens and closes.