JPH1163435A - Incinerating furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the maintenance such as lubrication of a bearing structure by supporting the movable fire grate by the rotating shaft, supporting the rotating shaft rotatively by bearings and arranging the bearings to the outside of a hopper. SOLUTION: A rotating shaft 161 supports the movable fire grate part and a movable frame 14 so that it rotates corresponding to the linear movement of the movable fire grate and the movable frame 14. The rotating shaft 161 is supported rotatively by the bearings 162 having the bearing structure and the bearings 162 are arranged to the outside of a hopper 20. The rotating shaft 161 pierces through the hopper 20 to the outside sealed by a sealing structure 163 and the edge part of the pierced shaft 161 to the outside of the hopper 20 is supported by the bearing 162 rotatively. Therefore, the bearing structure part is not exposed to powder dust or high temperature and the maintenance as the lubrication of the bearing structure is made easier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incinerator for incinerating objects to be incinerated, such as municipal solid waste, and more particularly, to an incinerator having a fixed grate and a movable grate which are inclined and alternately overlapped, and which are incinerated in the furnace. TECHNICAL FIELD The present invention relates to an incinerator having a stoker such as an upwardly slidable sliding type for transporting ash.

[0002]

2. Description of the Related Art In an incinerator of this type, a stalker of an upwardly inclined sliding type is provided at the bottom of the incinerator. The fixed grate and the movable grate that are inclined and alternately overlap each other are arranged in the width direction and locked by the fixed frame and the movable frame, respectively, and take the form of a keyboard-shaped fixed grate and a movable grate. When the movable frame is driven by a drive source such as a hydraulic cylinder, the movable grate stage performs a linear motion on (between) the fixed grate stage,
The objects to be incinerated, such as municipal waste, supplied into the furnace are transferred inside the furnace while being stirred and inverted. At this time, the ignited incineration material sunk into the lower part of the incineration material layer comes into contact with combustion air blown at high speed from an outlet formed by a concave portion formed on the lower surface of the tip of the fixed grate and the movable grate. Then, this becomes the core of the combustion, the combustion spreads, and the combustion continues on the entire surface of the stoker.

[0003] Here, in general, a structure composed of a movable frame and a movable grate step locked to the movable frame has a certain size and a certain weight,
The movable frame is supported by the fixed frame via support means so as to be capable of linear movement. Specifically, the support means is provided with a rail portion on one of the fixed frame and the movable frame, and provided with a wheel portion having a bearing structure on the other, and the wheel portion runs on the rail portion, or the rail portion is a wheel. It is structured to run on a part. Such a support means is described in, for example, Japanese Patent Application Laid-Open No. 4-186008. Accordingly, the structure including the movable grate stage and the movable frame smoothly linearly moves.

Under the stoker (grate), air for combustion is supplied into the furnace, and dust and ash fall from the furnace through the small gap between the grate and fall under the stoker. A hopper is provided to receive the hopper.

[0005] Such a stoker is an indispensable and important component in order to efficiently incinerate the incinerated material in this kind of incinerator.

[0006]

SUMMARY OF THE INVENTION Including the above example,
In a conventional incinerator, support means for supporting a structure comprising a movable frame and a movable grate step is disposed in a hopper. However, the inside of the hopper is filled with or diffused with dust falling in or from the incinerator through the gap between the grate, and has a high temperature of about 200 ° C. because of the passage of preheated combustion air. In other words, the precise structural portion of the supporting means, such as the wheel portion having the bearing structure, is placed in an environment that is unfavorable for its operation. Furthermore, since it is arranged in the hopper, there is a problem that maintenance such as oil supply to the bearing structure is difficult.

An object of the present invention is to provide an incinerator with high reliability and high maintainability.

[0008]

According to the present invention, there is provided a fixed grate and a movable grate which are inclined and alternately overlapped with each other. A stoker, a supporting means for supporting the movable grate so as to be capable of linearly moving, and a hopper arranged under the stoker to supply combustion air into the furnace and receive dust and ash from the furnace. In the incinerator having, the supporting means comprises: a rotating shaft that rotates in accordance with the linear movement of the movable grate, and supports the movable grate; and a bearing that rotatably supports the rotating shaft. And the bearing is disposed outside the hopper, thereby obtaining an incinerator.

According to the present invention, there is also provided the incinerator wherein the movable frame for locking the movable grate and the rotating shaft constitute a rack / pinion structure or a chain / sprocket structure.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An incinerator according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a refuse incineration system including an incinerator according to an embodiment of the present invention. FIG.
FIG. 2 is a perspective view showing a main part of the present incinerator. FIG. 3 is a side view showing a main part of the present incinerator.

Referring to FIG. 1, a waste incineration system to which the present incinerator is applied includes an incinerator 1, a waste pit 2, a crane 3, a gas cooling chamber 4, an air preheater 5, and a residual heat utilization. It has an air heater 6, a bag filter 7, and a chimney 8. Then, drying and burning of incinerated materials such as municipal solid waste, treatment of exhaust gas, treatment of ash and dust, recovery of residual heat, treatment of wastewater, and the like are continuously performed.

Referring to FIGS. 2 and 3, an incinerator 1 according to the present invention has a stoker 10 and a hopper 20.

The stoker 10 has a fixed grate stage and a movable grate stage that are alternately inclined and move. The movable grate stage moves linearly, and conveys the incineration material in the furnace. Each of the fixed grate stage and the movable grate stage includes a plurality of fixed grate 11 and movable grate 12 arranged in the width direction, respectively. Movable frame (not shown)
It is locked to. When the movable frame is driven by the hydraulic cylinder 15 as a drive source, the movable grate stage performs a linear motion on (between) the fixed grate stage,
The incineration material supplied into the furnace is transferred inside the furnace while being stirred and inverted.

The hopper 20 is disposed below the stoker 10,
The combustion air is supplied into the furnace, and dust and ash falling from the furnace through the gap between the grate are received.

The incinerator also has support means for supporting the movable grate 12 (movable grate stage and movable frame) so as to be capable of linear movement.

FIGS. 4 and 5 are cross-sectional views showing the main parts of the present incinerator, and show the inside of the hopper 20.
In these drawings, some hatching is omitted for convenience of explanation. Referring to FIGS. 3 to 5, the support means rotates in accordance with the linear movement of movable grate 12 (movable grate step and movable frame 14), and rotates to support movable grate step and movable frame 14. A shaft 161 and a bearing 162 having a bearing structure for rotatably supporting the rotating shaft 161 are provided. The bearing 162 is connected to the hopper 20
It is arranged outside. Specifically, the rotating shaft 161 penetrates outside the hopper 20 via the seal structure 163, and an end of the rotating shaft 161 penetrating outside the hopper 20 is rotatably supported by a bearing 162. The seal structure 16
3 is a hopper 20 while allowing the rotation of the rotation shaft 161.
The inner and outer sealing functions may be performed, and a simple structure may be used, for example, as compared with the case where the sealing function must be performed while allowing linear movement. Thus, the bearing structure is not exposed to dust and high temperature, and the reliability is high. Further, maintenance such as oil supply to the bearing structure may be performed on the bearing 162 outside the hopper 20, and the work is easy and the maintainability is high.

The movable frame 14 is provided with a rack 14a. On the other hand, a pinion is provided on the rotating shaft 161. That is, the movable grate and movable frame 14 and the rotating shaft 161 constitute a rack / pinion structure. As a result, the movable frame 14 is
It does not slip on the peripheral surface of the tire and causes uneven wear. As a countermeasure against this slip problem, a chain / sprocket structure or the like may be applied. Incidentally, such a structure for preventing slippage may have a lower accuracy than a bearing having a bearing structure for a rotating shaft, and even if it is arranged in the hopper 20, its operation is hardly hindered by dust or high temperature, Frequent maintenance is not required.

[0019]

According to the incinerator according to the present invention, the support means for supporting the movable grate in a linearly movable manner is rotated in accordance with the linear movement of the movable grate, and the rotating shaft for supporting the movable grate, Bearing that rotatably supports the shaft,
Since the bearing is disposed outside the hopper, the bearing structure is not exposed to dust and high temperature, and the reliability is high. In addition, maintenance such as oil supply to the bearing structure is easy, and maintainability is high.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a refuse incineration system including an incinerator according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of the incinerator according to the embodiment of the present invention.

FIG. 3 is a side view showing a configuration of a main part of the incinerator according to the embodiment of the present invention.

FIG. 4 is a sectional view showing a configuration of a main part of the incinerator according to the embodiment of the present invention.

FIG. 5 is a sectional view showing a configuration of a main part of the incinerator according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Stalker 11 Fixed grate 12 Movable grate 13 Fixed frame 14 Movable frame 14a Rack 15 Hydraulic cylinder 20 Hopper 161 Rotation shaft 161a Pinion 162 Bearing 163 Seal structure

Claims (2)

[Claims] 1. A stoker which comprises a fixed grate and a movable grate which are inclined and alternately overlapped with each other, and a stoker which conveys an incineration object in a furnace by linearly moving the movable grate; An incinerator having movably supported support means, and a hopper disposed below the stoker for supplying combustion air into the furnace and receiving dust and ash from the furnace; Comprises a rotating shaft that rotates in accordance with the linear movement of the movable grate, and supports the movable grate, and a bearing that rotatably supports the rotating shaft, wherein the bearing is provided outside the hopper. An incinerator characterized in that it is arranged in the incinerator. 2. The incinerator according to claim 1, wherein the movable frame for locking the movable grate and the rotating shaft constitute a rack / pinion structure or a chain / sprocket structure.