JPH1089656A - Garbage incinerator stoker device - Google Patents

Abstract

(57) [Problem] To provide a stoker device of a refuse incinerator having a dust stirring function that can arbitrarily set the transfer speed of dust at individual positions in the left-right direction of the stalker device. SOLUTION: This is a stoker device of a garbage incinerator provided with a plurality of grate 11 arranged side by side in the front-rear, left-right direction with respect to a garbage transport direction X, and a drive mechanism K for reciprocatingly driving the grate 11 back and forth. To configure the driving mechanism K, a plurality of grate 11
Shaft 13A capable of reciprocally driving in the dust transport direction X
Are arranged in such a manner that the axis thereof is along the left-right direction Y with respect to the dust transport direction X, and the engagement recesses 12 that engage with the drive shaft 13A are provided on each of the grate 11 so as to engage with the drive shaft 13A. The grate 11 having a different play amount from the joint recess 12 is arranged in the left-right direction Y.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stoker apparatus for a refuse incinerator having a plurality of fire grates arranged side by side in the front, rear, left and right directions with respect to the garbage transport direction, and a drive mechanism for reciprocating the grate back and forth. About.

[0002]

2. Description of the Related Art Conventionally, in a stoker device of this type of refuse incinerator, a plurality of grates are arranged in a direction perpendicular to the direction in which the trash is conveyed, that is, in a lateral direction of the stoker device. One end of the grate was supported without play by a drive shaft that reciprocates in the direction of transporting the dust. This drive shaft extends in the left-right direction of the stoker device, and all the grate supported by the drive shaft also perform the same reciprocating operation. The dust transfer speed was the same.

[0003]

However, according to the stoker device of the above-mentioned conventional refuse incinerator, there are the following problems. For example, the accumulation amount of dust may be different in the left-right direction of the stoker device, and if all the loaded dust is conveyed at a constant speed, the dust in the portion with a large accumulation amount may not be burned. In addition, at the left and right side edges of the stoker device, dust often comes into contact with the walls of the incinerator, and the transfer of dust loaded on the side edges tends to be delayed due to the sliding contact resistance. If such a variation in the transport speed occurs in addition to the non-uniform loading amount of the dust, it becomes difficult to reliably burn the dust. Further, in the conventional transport method, the grate performs the same operation in the left-right direction of the stoker device, so that the effect of stirring the loaded dust is small. Therefore, there is a high possibility that the inside of the loaded garbage will not be burned. As described above, in the conventional stoker device, there are various problems regarding the transfer of dust, and there is still room for improvement.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to set the conveying speed of dust at individual positions in the left and right direction of the stoker device and to have a function of stirring the dust. An object of the present invention is to provide a furnace stoker device.

[0005]

[Means for Solving the Problems]

(Structure 1) A stoker device for a garbage incinerator according to the present invention comprises:
As described in claim 1, a drive shaft capable of reciprocatingly driving a plurality of grates in the dust transfer direction is provided with its axis aligned along the left-right direction with respect to the dust transfer direction and the drive shaft. An engagement concave portion that engages with the grate is provided on each of the grate, and a drive mechanism is configured by arranging the grate having different play amounts between the drive shaft and the engagement concave portion in the left-right direction. Having. (Operation / Effect) The stalker device of the present invention is characterized in that the grate extending in the left-right direction and having different play amounts of the engaging concave portions engaging with the drive shaft, which performs a constant reciprocating operation, is used. Since they are arranged side by side in the left-right direction, the reciprocating drive amount of the grate can be arbitrarily set by appropriately setting the play amount of each engagement recess. As a result, it is possible to appropriately set the dust transport speed at each position in the left-right direction of the stoker device. For example, at the stoker side edge having a large sliding contact resistance with the furnace wall, the play amount is set to be small and the dust transfer speed is set to be large, so that the difference in the dust transfer speed in the left-right direction of the stoker device can be eliminated. Also,
When the reciprocating drive amounts of the respective grate are different, the pressing distance of the dust by the ends of the respective grate is different, so that the effect of stirring the dust and improving the combustion efficiency is obtained. Further, since the conventional configuration can be used as it is for the drive shaft and the means for reciprocating the drive shaft, the combustion efficiency can be improved by a very simple method of changing the shape of the engagement recess of the grate. A stoker device for a refuse incinerator can be configured.

[0006]

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

FIG. 1 shows a stoker device 1 of a general refuse incinerator. That is, the dust put into the hopper 2 is extruded and supplied to the inside of the furnace 4 by a pusher 3 provided at a lower portion thereof, and high-temperature primary combustion air 6 is supplied through a wind box 5 provided at a lower portion of the stoker device 1. The primary combustion air 6 is supplied to a primary air supply space K1 at a lower portion of the stoker device 1.
Is provided above the stoker device 1 in the garbage transport space K2.
The stoker device 1 is configured to dry, burn, and incinerate the garbage while stirring and transporting the garbage, so that the incinerated ash is accumulated in the ash pit 7.

The stoker device 1 includes a drying zone 8 for drying the supplied dust and heating it to a temperature near the ignition point, a combustion zone 9 for burning the dried dust, and an ashes for the dust burned in the combustion zone 9. And a combustion zone 10. Dry zone 8
A wind box 5 for supplying combustion air 6 is provided below each of the sections from to the post-combustion zone 10. The combustion air 6 supplied from the wind box 5 penetrates the portion where the grate 11 is provided, and reaches the dust loaded on the upper portion of the grate 11.

FIG. 2 shows the appearance of the grate 11 according to the present invention. Although not shown in detail, the grate 11 is driven back and forth by a drive mechanism K. The drive mechanism K has two types of shafts 13 extending in a direction perpendicular to the dust transport direction X, that is, in the left-right direction Y of the stoker device. One is a drive shaft 13A that is driven to reciprocate along the transport direction X of the dust, and the other is a fixed shaft 13B that is not driven to reciprocate in the transport direction X. In the present embodiment, it is assumed that both shafts 13A and 13B have the same diameter. The grate 11 is provided in a plurality in the left-right direction Y by engaging an engagement recess 12 provided in the grate 11 itself with each of the shafts 13A and 13B. In the present invention, two types of grate 11A, 11B are used. One is a non-moving grate 11A that engages with the shaft 13 in the transport direction X without play, and the other is a free-moving grate that is freely movable in the transport direction X with respect to the shaft 13. It is a floating grate 11B. Whether or not it is free to move along the transport direction X depends on the difference in the shape of the engagement portion 12 formed on each grate. The non-moving grate 11A is provided with a non-moving recess 12A having a notch width substantially equal to the diameter of the shaft 13.
B has a floating recess 12B having a notch width larger than the diameter of the shaft 13. The non-moving grate 11A and the floating grate 11B are engaged and arranged in an arbitrary arrangement order with respect to the drive shaft 13A, and the non-moving grate 11B is engaged with the fixed shaft 13B.
Only A is engaged.

FIG. 3 shows the non-moving grate 11A and the floating grate 1 engaged with the drive shaft 13A.
1B shows an operation outline. Here, the drive shaft 1
3A shows three states when 3A moves along the transport direction X. In FIG. 3, both grate 11A, 11B
In order to clarify the difference between the operations, the two are shown side by side. (A) is a state in which the drive shaft 13A has reached the uppermost side in the transport direction X. The floating grate 11B is shown pulled back by the drive shaft 13A, and the floating recess 12B
Is in contact with the drive shaft 13A. (B) shows a state in which the drive shaft 13A moves to the lower side in the transport direction X, and the drive shaft 13A and the other end of the floating recess 12B are in contact with each other. Until now, the non-moving grate 11A is driven by the drive shaft 13A, but the floating grate 11B remains stationary. However, thereafter, the floating grate 11B is also driven by the drive shaft 13A. (C) is a state in which the drive shaft 13A has reached the lowermost side in the transport direction X. That is,
At this time, both the grate 11A and 11B are also located at the lowermost side in the transport direction X.

The idle recess 12B has an idle area in which the drive shaft 13A can idle by a distance d. As a result, the drive shaft 13
The movement of the floating grate 11B to the reciprocating drive of A is exempted by a certain distance. That is, in FIG. 3, the floating grate 11B is not driven at all in the range from (a) to (b), and the floating grate 11B is driven only in the range from (b) to (c). . Therefore, the driving stroke Sb of the floating grate 11B is obtained by subtracting the distance d of the floating region from the driving stroke S of the drive shaft 13A. That is, the larger the distance d is set, the more the drive stroke Sb of the floating grate 11B
Becomes smaller. On the other hand, the drive stroke Sa of the non-moving grate 11A is equal to the drive stroke S of the drive shaft 13A.

As described above, by arranging the non-moving grate 11A and the floating grate 11B having different driving strokes along the left-right direction Y of the stoker device 1 as appropriate, the respective grate 11A, 11B There is a difference between the leading and trailing ends, and the conveying speed of the dust can be made different. In addition, the difference between the going and leaving has an effect of stirring the dust. For example, if the floating grate 11B is provided only at the center position along the left-right direction Y of the stoker device 1 and the non-movable grate 11A is provided on both sides of the stoker device 1, the garbage transport speed at both sides can be improved. Can be set larger than the speed at the center position. In this case, the influence of the sliding contact resistance due to the sliding contact of the dust with the furnace wall is eliminated, and the dust transport speed becomes equal at any position in the left-right direction Y. In addition, if the garbage transport speed at the central position along the left-right direction Y of the stoker device 1 is actively reduced, the garbage burning time at the central position where the amount of garbage tends to be increased is prolonged. It will also be possible to secure incineration completely.

The cross-sectional shape of the non-moving grate 11A and the floating grate 11B in a direction perpendicular to the longitudinal direction is at least the non-moving grate 11A.
Is preferably configured as a side rib type as shown in FIG. In the present invention, the amount of withdrawal differs between adjacent grate. Assuming that the protruding non-moving grate 11
When A is a so-called center rib type having a substantially T-shaped cross section, the primary air supply space K1 at the lower part of the stoker device 1 is provided on the side surface of the protruding non-moving grate 11A. A gap leading to the gap appears, and unburned refuse falls into the primary air supply space K1 from this gap. If the non-idling grate 11A is a side rib type, such a disadvantage does not occur. Of course,
Not only the non-moving grate 11A but also the floating grate 11
There is no problem in configuring B as a side rib type.

[Another Embodiment] In the above embodiment,
Although the shape of the engagement concave portion 12 of the grate 11 was made variously different, the present invention is not limited to this configuration. As shown in FIG. 4, the drive shaft 13A is different at each position in the axial direction. You may comprise in the shape which has an outer diameter. Further, the distance d of the floating region is not limited to one type, and a plurality of types of floating grate 11B may be formed so as to have different floating regions. In that case, the dust transport speed at each position in the left-right direction Y of the stoker device 1 can be set freely, so that dust incineration can be performed more reliably.

In the description of the appended claims, reference is made to the drawings and, in order to facilitate comparison with the drawings, reference numerals are used. However, the description is not intended to limit the present invention to the configuration of the accompanying drawings. Absent.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an outline of a garbage incinerator.

FIG. 2 is a schematic view showing a grate driving mechanism according to the present invention.

FIG. 3 is an explanatory view showing an outline of the operation of the grate according to the present invention.

FIG. 4 is a schematic view showing a grate driving mechanism according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Grate 12 Engagement recess 13A Drive shaft K Drive mechanism X Dust transfer direction Y Left-right direction

Claims (1)

[Claims] 1. A plurality of fire grate (11) are arranged side by side in the front-rear and left-right directions with respect to the dust transfer direction (X), and a drive mechanism (K) for reciprocatingly driving the fire grate (11) is provided. A stoker device for a refuse incinerator, wherein the drive mechanism (K) comprises: a drive shaft (13A) capable of reciprocally driving the plurality of grate (11) in the trash transfer direction (X); The shaft recess is disposed along the left-right direction (Y) with respect to the dust transport direction (X), and the engaging recess (1) is engaged with the drive shaft (13A).
2) is provided for each of the grate (11), and the grate (11) in which the play amount between the drive shaft (13A) and the engagement recess (12) is different from each other is set in the left-right direction (Y). Of garbage incinerators arranged in a row.