JPH1163434A - Incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an incinerator which can lower the maintenance cost and can efficiently incinerate the material to be incinerated. SOLUTION: A fixed fire grate 11 and a movable fire grate 12 respectively comprise a fixed fire grate body 11a, a movable fire grate body 12a and chutes 11b, 12b which are mounted on the underside of the fixed fire grate body 11a and the movable fire grate body 12a in such a manner that they are slidable in a substantially hermetical manner relative to the upper surfaces of the movable fire grate body 12a and the fixed fire grate body 11a which are overlapped below the movable fire grate body 12a and the fixed fire grate body 11a. Between the fixed fire grate body 11a and the movable fire grate body 12a and chutes 11b and 12b which are respectively mounted on the fixed fire grate body 11a and the movable fire grate body 12a, air outlets 11c, 12c for combustion air are formed.

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

[0004]

SUMMARY OF THE INVENTION Including the above example,
In a conventional incinerator, the lower surface of the fixed grate and the movable grate slides on the upper surface of the movable grate and the fixed grate that underlie the grate. To go.

[0005] In particular, in the stoker of the conventional incinerator, since the combustion air outlet is formed by forming a concave portion on the lower surface of the tip of the grate, for example, the entire lower surface is a sliding surface. Compared to a certain grate, the sliding area is small, the sliding frequency per unit area is high, and the progress of wear is large. In addition, the fixed grate and the movable grate, which have been worn out so as not to interfere with the operation as a stoker, must be replaced as a whole, and there is a problem that maintenance costs are high.

Further, as the lower surface of the grate wears, the concave portion becomes shallower, the opening area of the combustion air outlet decreases, and the required amount of combustion air can be supplied to a required location. There is a problem in that the incinerator cannot be efficiently incinerated as an incinerator. Further, in such a case, it is necessary to replace the entire worn grate.

An object of the present invention is to provide an incinerator with a low maintenance cost.

Another object of the present invention is to provide an incinerator that can incinerate an incinerated object efficiently.

[0009]

According to the present invention, there is provided an incinerator having a fixed grate and a movable grate which are alternately and obliquely overlapped with each other, and which has a stoker for conveying an incinerated object in the furnace. The grate and the movable grate are respectively attached to a fixed grate body and a movable grate body, and the movable grate body attached below and below the fixed grate body and the movable grate body, respectively. And a shoe that relatively slides while being substantially in close contact with the upper surface of the fixed grate main body,
An incinerator is provided in which an air outlet for combustion air is formed between each of the fixed grate body and the movable grate body and the shoes attached to each.

According to the present invention, there is also provided the incinerator wherein the shoe is detachably attached to the fixed grate body or the movable grate body.

According to the present invention, there is further obtained the incinerator wherein the shoe is attached to a lower portion of a tip of the fixed grate body or the movable grate body.

According to the present invention, there is also provided the incinerator wherein the shoe is made of a material having lower wear resistance than the fixed grate body and the movable grate body.

[0013]

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, 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 overlapped while being inclined, and conveys the incineration material in the furnace by the movable grate stage moving linearly. 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 a supporting means for supporting the movable grate 12 (movable grate step and movable frame) so as to be able to move linearly.

FIG. 4 is a sectional view showing details of the fixed grate 11 and the movable grate 12. Referring to FIG. 4, fixed grate 11 and movable grate 12 are fixed grate main body 11.
a, movable grate body 12a, fixed grate body 11a,
Attached to the lower side of each movable grate body 12a,
It is composed of a movable grate body 12a that overlaps below itself, and shoes 11b and 12b that slide relatively while being substantially in close contact with the upper surface of the fixed grate body 11a.

Fixed grate body 11a, movable grate body 1
Combustion air outlets 11c, 12c are formed between 2a and shoes 11b, 12b attached to each. As a result, even if the lower surface of the shoe and the upper surface of the grate body slide and wear between the overlapping grate, the outlet of the combustion air does not change while keeping the initial opening area.

The shoes 11b and 12b are attached below the fixed grate main body 11a and the movable grate main body 12a, respectively. The shoes 11b and 12b are respectively
It is detachably attached to the fixed grate main body 11a and the movable grate main body 12a. More specifically, the shaft attached to the shoe is inserted into the grooves 11a-1 and 12a-1 which are formed at right angles in the fixed grate main body 11a and the movable grate main body 12a. When removing the grate, the grate is lifted so as to rotate around the frame locking portion at the rear end of the grate, and the shaft is removed from the groove.

The shoes 11b and 12b are made of a material having lower wear resistance than the fixed grate main body 11a and the movable grate main body 12a, respectively. For example, shoes 11b, 1
2b is a heat-resistant casting, and the fixed grate main body 11a and the movable grate main body 12a are heat- and wear-resistant cast steel. This allows
The wear on the grate body is reduced and the grate body does not need to be replaced over a long period of time.

[0024]

In the incinerator according to the present invention, the fixed grate and the movable grate are attached to the fixed grate body and the movable grate body, respectively, and below the fixed grate body and the movable grate body, A movable grate body and a shoe that slides relatively closely while being in close contact with the upper surface of the fixed grate body underneath itself. Since the air outlet for combustion air is formed between and the shoes attached to each, there is no need to replace the grate main body, and the maintenance cost is low. In addition, it is possible to efficiently incinerate the incinerated material without reducing the opening area of the air outlet for combustion air to supply a necessary amount of combustion air to a necessary place.

[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 in detail a structure of a grate of the incinerator according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Stalker 11 Fixed grate 11a Fixed grate main body 11b, 12b Shoe 11c, 12c Air outlet 11a-1, 12a-1 Groove part 12 Movable grate 12a Movable grate main body 13 Fixed frame 15 Hydraulic cylinder 20 Hopper 162 Bearing

Claims (4)

[Claims] 1. An incinerator having a fixed grate and a movable grate that are alternately overlapped in an inclined manner and having a stoker for conveying an incineration object in the furnace, wherein the fixed grate and the movable grate are each A fixed grate body and a movable grate body, attached to the lower side of the fixed grate body and the movable grate body, respectively, with respect to the upper surface of the movable grate body and the fixed grate body overlapping below the same; The fixed grate main body and the movable grate main body, and the shoe attached to each of the fixed grate main body and the movable grate main body. An incinerator characterized by having an air outlet. 2. The incinerator according to claim 1, wherein the shoe is detachably attached to the fixed grate body or the movable grate body. 3. The incinerator according to claim 1, wherein the shoe is mounted below a tip of the fixed grate body or the movable grate body. 4. The incinerator according to claim 1, wherein the shoe is made of a material having lower wear resistance than the fixed grate body and the movable grate body.