JPH0926116A - Stoker type refuse incinerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make even the thickness of refuse on a stoker and promote the drying and combustion of refuse, and thereby enhance combustion efficiency by dividing a fire grate of a fan-shaped stoker in the width direction of a furnace and making the fire grate swingable independently. SOLUTION: A fan-shaped stoker 16 is divided into two sections at the central part in the width direction of a furnace and provides a pivotal shaft 20 which penetrates through a furnace wall 2a of an incinerator main body 2 and pivots with a bearing 19 and a turning shaft 22 which penetrates the other furnace wall 2b and pivots with a bearing 21. There are provided a plurality of fan- shaped fire grates 18 fixedly provided on the bearings 19 and 21 respectively and a cylinder 23 which is provided outside one furnace wall 2a and turns the pivotal shaft 20 and a cylinder 24 which is provided outside the other furnace wall 2b and turns the turning shaft 22. The cylinders 22 and 24 are operated separately from each other, thereby making the fan-shaped fire grate 18 of the pivotal shaft 20 and the fan-shaped fire grate 18 of the turning shaft 22 swingable independently. It is, therefore, possible to make even the thickness of refuse on the fan-shaped stoker 16 by shearing the agitation of refuse in lump shape and break up the refuse and enhance contact of combustion air.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a stoker-type refuse incinerator using a fan-type grate.

[0002]

2. Description of the Related Art In a stoker-type refuse incinerator, a dry stoker, a combustion stoker, and a post-combustion stoker are arranged in a staircase order from the upper stage to the lower stage in the stoker, and in the dry stoker, waste heat is exchanged with combustion gas. Are dried with combustion air and combustion radiant heat that have been preheated by the above method, the dried dust is burned with a combustion stoker, and the incomplete combustion products are completely burned with a post combustion stoker, and the combustion ash is discharged from the lower part of the incinerator by a conveyor etc. Many are used.

A stoker-type refuse incinerator using a fan-shaped grate is a stoker-type garbage incinerator in which a plurality of fan-shaped grate is fixed to the entire width of the furnace on a rotary shaft that is horizontally extended in the furnace width direction. By arranging a plurality of rows in a stepwise manner from the upstream to the downstream in the moving direction of each, and rotating each rotating shaft by a driving device, the fan-shaped grate in each row is sequentially arranged from the horizontal to the vertical direction at an elevation angle of about 60 to 70 degrees. Shake to stir and move the trash.

[0004]

However, in the above structure, the thickness of the dust on the fan-shaped grate on the same row is thicker in the vicinity of the furnace walls on both sides and thinner in the central part, or thicker in the central part. The vicinity of the wall may become thin, and if the thickness of the dust becomes uneven in this way, the degree of drying and combustion differs between the surface layer and the inside of the dust, and it may take a long time to completely burn and reduce the incineration efficiency. is there.

Therefore, an object of the present invention is to provide a stoker-type refuse incinerator in which the thickness of the refuse on the fan-type stoker is averaged to promote the drying and burning of the refuse and the incineration efficiency is improved. .

[0006]

In order to achieve the above object, the present invention provides a fan-type stoker having a plurality of fan-type grate fixedly mounted on a rotary shaft laid in the furnace width direction to move dust. In the stoker-type refuse incinerator, in which a plurality of rows are arranged in a stepwise manner from upstream to downstream in the direction, and each rotating shaft is rotated by a drive device to oscillate the fan-shaped grate to incinerate the waste, The fan-shaped grate of the fan-shaped stoker is divided in the width direction of the furnace, and each fan-shaped grate can be independently rocked, and the dust thickness is averaged by the independent rocking of each fan-shaped grate on the same row. And let
It also improves the loosening of waste and promotes the drying and burning of waste.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in more detail based on the embodiments shown in the drawings.

1 to 3 show a first embodiment of the present invention, in which a stoker type refuse incinerator 1 comprises an incinerator body 2
The hopper 4 is provided above the charging port 3 of the
A dry stoker 5 is disposed upstream in the direction of movement of dust, and a combustion stoker 6 that performs a combustion process and a post-combustion process is disposed downstream in a stepwise manner, and a dust supply device 7 that supplies dust to the dry stoker 5 below the charging port 3 And the ash receiver flap 8 is arranged downstream of the combustion stoker 6, and the ash chute 9 with a damper is provided below the drying stoker 5, the combustion stoker 6 and the ash receiver flap 8, respectively.
10 and 11 are arranged, and an ash discharging conveyor 12 is provided below each ash chute 9, 10, 11.

In addition, a machine room 13 in which a blower for supplying combustion air preheated by heat exchange with combustion gas to the drying stoker 5 and the combustion stoker 6 is installed in the lower part of the dust supply device 7 is arranged, and an incinerator is provided. A recombustion chamber 14 and a gas cooling chamber 15 are arranged above the main body 2.

The dry stoker 5 is provided with three rows of fan-shaped stokers 16 having the same structure, and the combustion stoker 6 is provided with
Eight rows of fan-shaped stokers 17 having the same structure are arranged. Since the fan-shaped stoker 17 of the combustion stoker 6 uses the fan-shaped grate 18 having a smaller diameter than the fan-shaped stoker 16 of the dry stoker 5, the fan-shaped stoker 16 will be described below.

The fan-shaped stoker 16 is divided into two parts in the central part in the width direction of the furnace. The fan-shaped stoker 16 penetrates one of the furnace walls 2a of the incinerator main body 2 and is provided with a bearing 19 provided in the central part of the incinerator main body 2. The rotary shaft 20 that is pivotally supported on the other side, and the other furnace wall 2 of the incinerator body 2
Bearing 2 which penetrates b and is provided in the central part of incinerator body 2
1, a rotary shaft 22 pivotally supported on the rotary shaft 20, a plurality of fan-shaped grate 18 fixedly mounted on the rotary shafts 20 and 22, respectively, and a rotary shaft 20 provided outside the one furnace wall 2a to rotate the rotary shaft 20. It is composed of a moving cylinder 23 and a cylinder 24 which is provided outside the other furnace wall 2b and rotates the rotating shaft 22.

With this structure, the cylinder 23 and the cylinder 24 are operated separately, and the fan-shaped grate 18 of the rotating shaft 20 and the fan-shaped grate 18 of the rotating shaft 22 are independently operated. Since the rocking can be performed, the thickness of the dust on the fan-shaped stoker 16 can be averaged by stirring and shearing the nodule-like dust, and the loosening of the dust and the contact with the combustion air become good. Therefore, the drying of the dust is promoted in the dry stoker 5, and also in the combustion stoker 6 in which the fan-shaped stoker 17 having the same structure as the fan-shaped stoker 16 is arranged,
Since the contact between the loosening of the refuse and the combustion air is improved and combustion is promoted, the combustion efficiency of the entire stoker-type refuse incinerator 1 is improved.

FIG. 4 shows a second embodiment of the present invention. The fan-type stoker 30 is divided into three parts in the furnace width direction and penetrates both furnace walls 2a and 2b of the incinerator body 2. A rotary shaft 31, a rotary shaft 32 that is mounted on one side of the rotary shaft 31 on the side of the furnace wall 2a, and a rotary shaft 33 that is mounted on the other side of the rotary shaft 31 on the side of the furnace wall 2b. Cylinder 34 for rotating the drive shaft 31
A cylinder 35 for rotating the rotating shaft 32, and a rotating shaft 33.
A rotary cylinder 36, a plurality of fan-shaped grate 18 fixed to the center of the rotating shaft 31, and a plurality of right-side fan-shaped grate 18 fixed to the rotating shaft 32. , A plurality of left-sided fan-shaped grate 18 fixed to the rotating shaft 33,
By swinging the central fan-shaped grate 18, the right-sided fan-shaped grate 18 and the left-sided plurality of fan-shaped grate 18 independently of each other, the thickness of dust on the fan-shaped stoker 30 can be reduced. Average out.

FIG. 5 shows a third embodiment of the present invention. The fan-type stoker 40 is divided into four in the furnace width direction and penetrates one furnace wall 2a of the incinerator body 2. A rotary shaft 42 supported by a bearing 41 provided in the central portion of the incinerator body 2 and the other furnace wall 2b of the incinerator body 2,
A rotary shaft 44 supported by a bearing 43 provided in the central portion of the incinerator main body 2, a rotary shaft 45 mounted on the one furnace wall 2a side of the rotary shaft 42, and a rotary shaft 44. A rotating shaft 46 that is mounted on the other furnace wall 2b side, a cylinder 47 that rotates the rotating shaft 42, a cylinder 48 that rotates the rotating shaft 44, and a cylinder 49 that rotates the rotating shaft 45. And a plurality of fan-shaped grate 18 fixed to the rotating shafts 42, 44, 45, and 46, respectively, and the rotating shafts 42, 44, and The thickness of dust on the fan-shaped stoker 40 is averaged by swinging each of the fan-shaped grate 18 of 45 and 46 independently.

[0015]

As described above, in the stoker-type refuse incinerator of the present invention, the fan-shaped grate of each fan-shaped stoker is divided in the furnace width direction, and each fan-shaped grate can be independently rocked. The thickness of the dust is averaged by the independent swinging of each fan-shaped grate on the same row, and the loosening of the dust and the contact with the combustion air become good, promoting the drying and burning of the dust and increasing the incineration efficiency. Improve.

[Brief description of drawings]

FIG. 1 is a perspective view showing a fan-type stoker according to a first embodiment of the present invention.

FIG. 2 is a side sectional view of the same stoker type incinerator.

FIG. 3 is likewise a front view of a fan-type stoker.

FIG. 4 is a front view showing a fan-type stoker according to a second embodiment of the present invention.

FIG. 5 is a front view showing a fan-type stoker according to a third embodiment of the present invention.

[Explanation of symbols]

1 ... Stoker type refuse incinerator, 2 ... Incinerator body, 16, 1
7, 30, 40 ... Fan type stoker, 18 ... Fan type grate, 2
0, 22, 31, 32, 33, 42, 44, 45, 46
... Rotation axis, 23, 24, 34, 35, 36, 47, 4
8, 49, 50 ... Cylinder

Claims (1)

[Claims] 1. A plurality of fan-shaped stokers, each having a plurality of fan-shaped grate fixedly mounted on a rotating shaft extending in the furnace width direction, are arranged in a plurality of rows in a stepwise manner from upstream to downstream in the direction of movement of dust, and each rotation is performed. In a stoker-type refuse incinerator that oscillates a fan-shaped grate by rotating a shaft with a drive device to incinerate waste, the fan-shaped grate of each fan-shaped stoker is divided in the furnace width direction, A stoker-type refuse incinerator characterized by allowing each fan-shaped grate to swing independently.