JPS6014010A - Stoker type incinerator - Google Patents

Abstract

PURPOSE:To improve a drying effect and combustion efficiency, by a method wherein a support body, which can swing a fixed fire grate array at a base part, and a support body, which can swing a moving fire grate at a base part, are provided. CONSTITUTION:In case a matter to be burnt is fed as it is being agitated, a rod 8a of a forward and backward moving mechanism 8 is moved forward. This causes a second support body 7 to slide in a manner that it is pushed up obliquely forward, and a moving fire grate 2 is moved over a fixed fire grate 3. When an incinerating device is inclined, a rod 9a of a lifting mechanism 9 is moved forward. In which case, a first support body 6 turns upward around an incinerating device supporting rod 11 serving as a fulcrum. This enables production of a high drying effect and combustion effect irrespective of the nature of the matter to be burnt and permits prevention of the occurrence of incomplete combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a stoker-type incinerator used as a combustion shelf in a municipal garbage incinerator, and in particular, the stoker has a sliding grate that is incinerated on a sliding grate, which is effective in stirring the combustible material. This relates to a stoker-type incinerator configured to increase the drying and combustion efficiency of burnable materials by controlling the residence time on the two sliding grate of the stoker while maintaining the It is.

A large incinerator that incinerates municipal waste is equipped with a grate (hereinafter referred to as a "rosdol") to support the input combustible materials and transport them sequentially to the drying zone, combustion zone, and post-combustion zone. Ru. Although various types of these loss dollars are known, the present invention relates to an incinerator equipped with a stoker-type sliding loss dollar that slides on the support surface of the burnable object of the loss dollar.

FIG. 1 is a conceptual diagram illustrating such a sliding loss dollar, in which the loss dollar 1 alternates between a movable o-stle row 2 and a fixed loss dollar row 3 in the direction of conveyance of the combustible material.

The movable loss dollar row 2 is slid in the direction of the white arrow (diagonally upward) by a driving source (sliding drive shaft (not shown) connected to the sliding drive shaft (only the top row is shown in the figure) 5). make it move.

In the movable Rosdol row 2 and the fixed Rosdol row 3, a vent hole or ventilation groove 4 is formed in a part of the support surface of the combustible material to direct combustion air from the bottom side of the sliding Rosdol l to the top side of the Rosdol. It is configured so that it can be implemented.

The combustible material supplied onto the sliding loss lever 1 is sequentially pushed down on the sliding loss dollar toward the lower stage while being agitated, and is moved along the direction of the arrow while being burnt. Therefore, even if the combustible material contains a wide variety of garbage or kitchen waste with a relatively high moisture content, the stirring effect will ensure a sufficient drying effect, and a carbonized film will be formed on the surface of the combustible material in the early stage of combustion. Even if the internal air permeability temporarily decreases due to the formation of a There is.

By the way, the above-mentioned stirring effect of the combustible material can generally be further enhanced by increasing the advancing and retracting speed (advancing and retreating drive gap) of the movable loss dollar train 2, but the feeding speed of the combustible material increases accordingly. , the residence time of the combustible material in each zone of drying, combustion, and post-combustion becomes shorter. As a result, the time of exposure to the high-temperature atmosphere in the furnace is short, and the materials to be burned are not sufficiently dried and pass through each zone sequentially, resulting in a reduction in combustion effectiveness. Conventionally, in order to compensate for this decrease in combustion efficiency, each zone was lengthened to extend the retention time of the combustibles, or other mechanical agitation devices were installed to increase the retention time of the combustibles. Measures are being taken to further increase drying efficiency. However, in the former case, the incinerator becomes large and the equipment cost increases, while in the latter case, the stirring device is complicated and there are problems with smooth operation under high temperatures.

The present invention was developed to eliminate these problems, and its purpose is to ensure sufficient residence time on the rosdle while maintaining the stirring effect of the burnt material being incinerated on the stoker-type sliding losdol. The aim is to provide an incinerator that can improve the drying effect and exhibit excellent combustion efficiency by controlling the drying process as much as possible.

That is, the present invention is such that the fixed loss dollar rows and the movable loss dollar rows are alternately arranged in the direction of feeding the combustible material.
A first support body that swingably supports each of the fixed Rosdle rows at a base portion thereof, and a second support body that swingably supports each movable p-stole row at a base portion thereof are provided, respectively;
A front end lifting mechanism of the first support body is provided below the front end of the support body in the direction of feeding the combustible material, and a second support body is provided below the second support body and covered with the first support body. The gist is that an advancing/retracting mechanism is provided for advancing and retreating diagonally forward in the fuel supply direction.

The configuration and effects of the present invention will be explained below based on the drawings of the embodiments.
Even if the mechanism for advancing and retracting the support body is changed to a cam mechanism, a rack and pinion mechanism, etc., these are all included within the technical scope of the present invention.

FIG. 2 is a side view illustrating the stoker type incinerator of the present invention, in which the materials to be burned are sequentially fed from the left side to the right side of the drawing. Third
The figure is a plan view of FIG. 2 viewed from above, with a portion broken away. 1 is a cross-sectional view taken along the line IV--IV in FIG. 3, and FIG. 5 is a cross-sectional view taken along the line v--v in FIG. 3. In these figures, 2 is a movable Rosdol row (hereinafter sometimes simply referred to as a movable Rosdol), 3 is a fixed Rosdol row (hereinafter sometimes simply referred to as a fixed i-string), 6 is a first support, and 7 is a second support. body, 8 is an advancing/retracting mechanism, 9 is a front end lifting mechanism, 1
0 indicates a support guide, and 11 indicates an incinerator support iron. The first support body 7 is formed into a rectangular parallelepiped shape by combining 6 long and 12 short crosspieces, while the second support 7 is formed into a multi-planar shape by combining 4 long and short crosspieces. These two supports have the second support 7 on the inside,
The first support body 6 is placed on the outside with a predetermined gap. The fixed loss handle 3 is rotatably inserted into the shaft aaK via bearings 3b attached to both edges of the upper surface of the first support body 6.
lrK support, horizontally arranged fixed I:I support,
... are swingably supported at their respective bases. On the other hand, the movable rosdols 2 are pivotally supported by the shirt 2a, which is swingably inserted through bearings 2b attached to both edges of the upper surface of the second support 7, and arranged laterally. ... are swingably supported at their respective bases.

The second support body 7 is slidably supported by a support guide 10 (described later) attached to brackets 17a and 17c (FIGS. 4 and 5) fixed to the bottom crosspiece of the first support body 6. be done. These support guides 10 are provided one each on the back side in FIG. 2, and the second support body 7 is supported by a total of four support guides 10. Furthermore, the third
For illustration purposes, the figure shows a support guide 10 and a platen) 17.
c is omitted. That is, the support guide 10 includes a roller holding arm 10a that holds a roller 10d that is rotatably supported, and a guide support arm that holds a U-shaped guide 10c that is arranged to surround the roller 10d from the outside. 10a, and a guide support arm 10a.
is fixed to the lower surface side of the second support body 7, and the roller holding arm lOb is fixed to the upper surface of the platen 17a, 17c. Further, the guide 10c is installed at approximately the same slope as the diagonal forward slope of the movable loss dollar 2. Furthermore, a sliding mechanism 8 for sliding the second support 7 diagonally forward is arranged between the second support 7 and the first support 6.

That is, the sliding mechanism 8 in the illustrated example utilizes a cylinder advancing/retracting mechanism, in which one side of the cylinder 8d is connected to a bearing 18c fixed to the bracket 17a, and the tip of the rod 8a is connected to both sides of the second support 7. It is connected to an inserted retaining rod 8b via a platen 18b. As the rod 8a advances, the second support rest 7 is pushed diagonally forward as shown in FIG. In addition, a rod casing 12 is installed in the middle of the rod 8a.
The rod collar 12 is held on the bearing 18a via the link arm 13. The bearing 18a is supported by a support plate 17b attached to the first support body 6. That is, the rod collar 12 holds the rod 8a so that it does not bend due to the weight of the entire movable rod 2 applied to the second support 7 when the movable rod 8a slides, and the weight of the combustible material subjected to stirring.

On the other hand, the first support body 6 has its rear end (rearward with respect to the feeding direction of the combustible material) pivoted by an incinerator support rod 11 protruding from the side wall of the furnace body (not shown), and its tip (
The front end (in front with respect to the combustion material feeding direction) is tiltably supported by a front end lifting mechanism (hereinafter simply referred to as lifting mechanism) 9. Like the sliding mechanism 8, the lifting mechanism 9 employs a cylinder-based advance/retreat mechanism, and one side of the cylinder 9 is connected to a bearing 19 disposed at the bottom of the furnace body, and the tip of the rod 9a is connected to both sides of the first support 6. Projecting support rod 9 c
r 9 c (Figure 5). Therefore, when the rods 9a, 9a are advanced, the first support body 6 tilts about the incinerator support rod 11 as a fulcrum, as shown in FIG. 8, which will be described later. At this time, the second support 7 tilts together with the first support 6.

6 to 8 are cross-sectional explanatory diagrams showing the operating state of the incinerator, FIGS. 6 and 7 show the sliding state of the second support 7, and FIG. 8 shows the tilting state of the first and second supports, respectively. It shows. That is, when feeding the combustible material while stirring it, the rod 8a of the advancing/retracting mechanism 8 is advanced in the direction of arrow A. Then, the roller support arm 10a
The second support body 7 supported by the second support body 7 slides so as to be pushed diagonally forward, and the movable loss dollar 2 moves on the fixed loss dollar 3. At this time, the moving direction of the second support body 7 is regulated by the guide 10c engaged with the roller 10d, so that the moving direction is always constant. Further, the link arm 3 pivots so as to support the rod 8a. When the stirring by the movable loss dollar 2 is completed, the rod 8a is moved in the direction A' (
(Fig. 6) and retreat to the original position (Fig. 4) or the one-dot chain line (Fig. 6) position. Even in this case, the second support body 7 is engaged with the roller 10d and the guide 10c, so that smooth sliding is performed. Next, when tilting the incinerator, the rod 9a of the lifting mechanism 9 is advanced in the direction of arrow B (FIG. 8). At this time, the first support body 6 assumes a supine posture with the incinerator support rod 11 as a fulcrum. To return to the original state, it is sufficient to simply move the rod 9a back in the opposite direction.

When the inclination of the fourth support body 6 is changed by such operation of the lifting mechanism 9, the transfer pressure M of the combustible material (transferred forward when the movable loss dollar 2 advances once) is increased by the sliding of the movable loss dollar 2. (distance traveled by combustibles) changes.

That is, Figures 9 and 10 are explanatory diagrams showing the state of combustible material transfer when the movable p-stol 2 advances, and Figure 9 corresponds to the steady state in Figure 2, and Figure 10 corresponds to the solid line in Figure 8. This corresponds to the state in which the first support body 6 is tilted forward as shown in FIG. In both figures, T is the advancement length of the movable loss handle 2 in one stroke, and I
t and It are the moving distance of the burnable material transported by the movable loss dollar 2, h++112 is the push-up height of the burnable material, and θ゛ and θ+α are the inclination angles of the movable loss dollar 2 with respect to the incinerator installation surface, respectively. . That is, when the movable loss dollar 2 is advanced in a steady state, the burnt material is pushed diagonally forward at an angle θ and transferred forward by 11. The height of the object to be combusted at this time is expressed as tanθ. Then, by driving the lifting mechanism 9, the inclination angle of the movable loss dollar 2 is set to (θ+α), and the movable loss dollar 2 is set in the same manner as described above.
When the burnable material is slid diagonally forward, the material to be burnt is pushed diagonally forward at an angle of (θ+α) and transferred forward by l.

In this case, l is expressed in Table 6 as T-cos(0+α). Also, since the inclination angle of the movable loss dollar 2 is (θ+α)>0, 4='l'-cos(θ+α)<right=T-tan
A relational expression for θ is obtained. In addition, h2 at this time is right / cos (
O+α), so h2>hx.

That is, the larger the inclination angle of the first support body 9, the shorter the distance of the combustible material transported by one drive of the movable loss dollar 2 becomes shorter. As a result, the residence time of the combustible material placed on each loss dollar is increased, and the drying effect is improved. Furthermore, since the height of the object to be combusted is also ht>ht, the stirring efficiency is improved. The sliding timing of the movable rosdle 2 and the tilting timing of the incinerator are appropriately selected depending on the conditions for burning materials, but in order to maintain a high stirring effect on the combustible materials, it is necessary to Since it is more effective to increase the driving speed, it is preferable to operate the incinerator continuously, regardless of the timing and angle of tilting of the incinerator. By automatically controlling the residence time, optimal combustion conditions can be achieved.

The present invention is constructed as described above, but the key point is that the residence time of the combustible material in the furnace can be ensured with a simple mechanism while maintaining the drying efficiency of the combustible material, so it can be summarized as follows. You can get the same effect.

(1) High drying and combustion effects can be obtained regardless of the properties of the material to be burned, and incomplete combustion can be avoided.

(2) Since there is no need for an extra complicated stirring device unlike in the past, the stability of furnace operation is improved.

(3) Since the device is compact, it can contribute to downsizing of incinerators.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating a known stoker type incinerator;
FIG. 2 is a side view showing the stoker type incinerator of the present invention, and FIG. 3 is a partially cut away plan view of FIG. 2. Fig. 4 is a sectional view taken along the line IV-IV in Fig. 3, and Fig. 5 is a sectional view taken along the line IV-IV in Fig. 3.
6 is a drive state explanatory diagram corresponding to FIG. 4, FIG. 7 is a drive state explanatory diagram corresponding to FIG. 5, and FIG. 8 is a diagram corresponding to FIG. 2. Driving state explanatory diagram, No. 9,
FIG. 10 is an explanatory diagram showing the state of transfer of the combustible material.

Claims (1)

[Claims] (1) The fixed Rosdol rows and the movable Rosdol rows arranged in the width direction of the incinerator are arranged alternately in the direction of feeding the material to be burned, and the movable Rosdol rows are arranged in front of each other in the feeding direction. In a stoker type incinerator arranged so as to slide on a fixed rosdle surface of a row, a first support body swingably supports each of the fixed rosdol rows at a base portion thereof;
A second support body is provided which swingably supports each movable Rosdol row at its base, and a front end lift of the first support body is provided below the front end of the first support body in the direction of feeding the combustible material. The stoker type is characterized in that the first support is provided below the second support with an advance/retreat mechanism for advancing and retracting the second support diagonally forward in the direction of supplying the combustible material. Incinerator.