JPH0835639A - Structure of hearth for incinerator - Google Patents

Abstract

PURPOSE:To permit the absorption of the amount of widthwise expansion of a furnace, which is generated in the row of movable grates and the row of fixed grates of a stoker upon incinerating waste, at a plurality of widthwise places. CONSTITUTION:A thermal expansion amount absorbing means 21 is interposed in the row of grates at a proper place in the widthwise direction of a furnace while the thermal expansion amount absorbing means 21 is provided with a T-type fixed grate 22, having the sectional configuration of T-shape, side plates 23, 23, positioned at both sides of the T-type fixed grate 22 and movable into the direction of the row of grates in a position below an upper surface plate unit 22a, and an energizing means, energizing the side plates 23, 23 into the direction of row of grates. The side plates 23, 23 are fixed to a fixed grate 5 neighbored to the T-type fixed grate 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hearth structure of a refuse incinerator or an industrial waste incinerator.

[0002]

2. Description of the Related Art Conventionally, in an incinerator as shown in FIGS. 5 and 6, a drying zone B, a combustion zone C, and a post-combustion zone D are successively formed in a combustion chamber. The stoker 1 forming the hearth of each zone has a row of actuatable rostruts 2 and a row of fixed rostruls 3 that are inclined obliquely upward and forward, and are alternately arranged in the front-rear direction of the incinerator. The movable rostrut 4 and the fixed rostrut row 3 are formed by arranging a plurality of fixed rostruts 5 in parallel in the furnace width direction.

The movable rostrut 4 is fitted to a movable bar 7 provided on a movable frame 6 so as to hug it at a base end 4a, and is movable in the axial direction of the movable bar 7. Further, the fixed rostrut 5 is fitted to a fixed bar 9 provided on the fixed frame 8 so as to hug the fixed bar 9 at the base end portion 5a, and is movable in the axial direction of the fixed bar 9.

A drive cylinder device 11 is connected to the movable frame 6 via a crank mechanism 10, and a plurality of movable rostrut rows 2 supported by the movable frame 6 are integrally fixed by the withdrawal of the drive cylinder device 11. It slides on the row 3 of the ruster and conveys the dust on the stoker 1 to the next zone.

Further, between the air cooling wall 12 and the movable rostrut 4 and the fixed rostrut 5 facing the air cooling wall 12, the movable rostrut 4 and the fixed rostrut 5 are urged in the axial direction of the movable bar 7 and the fixed bar 9. A spring member (not shown) is installed to absorb the amount of thermal expansion generated in the movable rostrut 4 and the fixed rostrut 5 due to thermal expansion during refuse incineration by contraction of the spring member.

[0006]

However, in the above-mentioned hearth structure of the incinerator, the spring member can be arranged only on the furnace side, and the amount of thermal expansion that can be absorbed is limited. For this reason, when the scale of the incinerator becomes large and the number of movable rostruts 4 and fixed rostruts 5 increases as the width of the furnace widens and the amount of thermal expansion caused by thermal expansion increases, the amount of thermal expansion may be absorbed by some spring members. There was a problem I could not do.

The present invention solves the above-mentioned problems.
For the purpose of providing a hearth structure of an incinerator capable of absorbing the thermal expansion amount in the furnace width direction that occurs in the movable stalker row and the fixed stalker row of the stoker during waste incineration, at a plurality of locations in the furnace width direction. There is.

[0008]

In order to solve the above-mentioned problems, in the hearth structure of the incinerator according to the present invention, a plurality of rostrus are arranged in parallel to the width direction of the furnace to form a row of rostruls. Along with, a plurality of rostrul rows are arranged in the front-rear direction of the incinerator to form a stoker, and a thermal expansion amount absorbing means is interposed in the rostral row at an appropriate position in the furnace width direction, and this thermal expansion amount absorbing means is It has a T-shaped fixed rostrut with a T-shaped cross-section, side plates located on both sides of the T-shaped fixed rostrut, movable in the row direction of the rostrut, and a biasing means for biasing the side plate in the row direction of the rostrut. However, the side plate is fixed to the grate adjacent to the thermal expansion amount absorbing means.

Further, an upper shaft and a lower shaft are provided between the side plates on both sides, a link mechanism is pivotally supported on one end and the other end of the upper shaft and the lower shaft, and both ends of the link of the link mechanism are on both side plates. And a spring interposed between the upper shaft and the lower shaft to urge both shafts toward the center.

[0010]

According to the above configuration, when the rostral row expands in the furnace width direction due to thermal expansion during refuse incineration, the side plates move in the rostral row direction along with the thermal expansion of the rostrul row, and Absorb the amount of thermal expansion. When the thermal expansion disappears, the side plates are pushed outward by the urging means for moving the side plates in the direction of the loss trout to fill the gap between the loss factors.

Therefore, in the case where the number of rostruls in the rostrul row increases with the expansion of the furnace width and the total thermal expansion amount in the rostrul row increases, the number of thermal expansion amount absorbing means interposed in the rostrul row is appropriately increased. Can be dealt with.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. 1 is a partial side view of a hearth structure of an incinerator according to the present invention, FIG. 2 is a partially enlarged view of FIG. 1, FIG. 3 is a sectional view taken along the line AA of FIG. 1, and FIG. 4 is a view when a rostr is thermally expanded. A-A of 1
It is a line sectional view. In the above-mentioned conventional technique, the role of each zone in the combustion chamber and the arrangement of the movable rostrut row 2 and the fixed rostrut row 3 have been described above. The description is omitted.

The stalker 1 is provided with a thermal expansion amount absorbing means 21 at an appropriate position in the furnace width direction between the movable rostrut row 2 and the fixed rostrut row 3. As shown in FIG. 1, the thermal expansion amount absorbing means 21 includes a plurality of movable rostrut rows 2
Or it is arranged over the fixed Rostrul row 3,
A T-shaped fixed rostrur 22 having a T-shaped cross section, and side plates 2 arranged on both sides of the T-shaped fixed rostrut 22.
3 and 2 and link mechanisms 27 to 30.

The T-shaped fixed rostrut 22 has an upper surface plate portion 22a forming a hearth surface projecting upward from the movable rostrut 4 or the fixed rostrut 5 adjacent to the left and right, and a vertical support plate portion 22b on the fixed frame 8. It is fixed. The side plates 23, 23 are the top plate portion 22.
It is movable in the row direction of the rostrul (furnace width direction) at a position below a and is fixed to the fixed rostrut 5 adjacent to the T-shaped fixed rostrut 22. Side plates 23, 23
In the meantime, the link mechanisms 27 to 30 connect the side plates 23, 2
3 is attached via an attachment plate 24 provided on the inner wall of the unit 3. In this link mechanism, two cranks are orthogonally crossed in a dogleg shape, and the upper crank mechanism 27, 29
The intersecting portions of the cranks are rotatably supported at one end and the other end of the rod-shaped upper shaft 31. Similarly, the intersecting portions of the cranks 28 and 29 of the lower crank mechanism are pivotally supported at one end and the other end of a rod-shaped lower shaft 32. Further, both ends of these cranks are pivotally supported by a seat portion 25 formed on the mounting plate 24 via a crank shaft 26. A spring 25 is provided between the upper shaft 31 and the lower shaft 32.
Are interposed to bias both the upper shaft 31 and the lower shaft 32 toward the center.

Below the stoker 1, a plurality of chutes 34 forming a supply path of combustion air are provided along the direction of the rostr row (furnace width direction), and each chute 34 borders the thermal expansion amount absorbing means 21. It exists in each of the areas classified as. The thermal expansion amount absorbing means 2 is provided between the adjacent chutes 34.
They are separated by a T-shaped fixed loss 22 which is 1.

The operation of the above structure will be described below. At the time of incineration of the refuse, each movable rostrut 4 and each fixed rostrut 5 constituting the stalker 1 are thermally expanded, and the movable rostrut row 2 and the fixed rostrut row 3 are stretched in the rostral row direction (furnace width direction). In this way, the side plates 23, 23 move inward as shown in FIG. 4 with the thermal expansion of the movable rostrut row 2 and the fixed rostrut row 3,
The side plates 23, 23 absorb the thermal expansion of the rustles 4, 5. At this time, the upper shaft 3 is resisted by the urging force of the spring 33.
1 and the lower shaft 32 move upward and downward. Lostor 4,
When the thermal expansion of No. 5 subsides and returns to its original value, a large gap is generated between the rostruls. However, the upper shaft 31 and the lower shaft 32 are pulled in the center direction between the two shafts by the spring 33, and the cranks of the crank mechanisms 27 to 30 expand. Along with this, the side plates 23, 23 are pushed outward (in the direction of the row of the rostruls), so that the gap between the rostruls is filled. Therefore, during the thermal expansion of Rostr,
Alternatively, the structure is such that no gap is generated between the rostruls even when the thermal expansion subsides.

From the above, the size of the incinerator becomes large, and the number of the rostruls in the movable rostrul row 2 and the fixed rostrut row 3 increases with the expansion of the furnace width, and the total in the movable rostrul row 2 and the fixed rostrul row 3 increases. When the amount of thermal expansion increases, it can be dealt with flexibly by appropriately increasing the number of thermal expansion amount absorbing means 21 interposed in the rostr row.

In the above embodiment, the thermal expansion amount absorbing means 21
Although the configuration using the crank mechanisms 27 to 30 and the spring 33 has been described in the above, the thermal expansion amount absorbing means 21 is not limited to such a configuration, and for example, a coiled spring is used between the side plates 23, 23. Alternatively, a leaf spring may be used to absorb the thermal expansion.

[0019]

As described above, according to the present invention, the expansion in the width direction of the furnace caused by thermal expansion during refuse incineration in the width direction of the furnace is moved by the side plate attached with the link mechanism and the spring in the direction of the roaster row. When absorbed by doing so and the thermal expansion disappears, it is returned to the original state by the force of the spring, and no gap is formed between the rostruls. The expansion of the furnace width can be dealt with flexibly by appropriately increasing the number of thermal expansion absorbing means interposed in the rostr row.

[Brief description of drawings]

FIG. 1 is a partial side view of a hearth structure of an incinerator according to the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a sectional view taken along line AA of FIG. 1;

FIG. 4 is a cross-sectional view taken along the line AA of FIG. 1 when the roster is thermally expanded.

FIG. 5 is an explanatory view of a stoker in a conventional incinerator.

FIG. 6 is a cross-sectional view of a conventional stoker.

[Explanation of symbols]

 1 Stalker 2 Movable Rostrul Row 3 Fixed Rostrul Row 4 Movable Rostrur 5 Fixed Rostrut 21 Thermal Expansion Absorber 22 T-Type Fixed Rostrut 23 Side Plate 27-30 Link Mechanism 31 Upper Shaft 32 Lower Shaft 33 Spring

Claims (2)

[Claims] Claim: What is claimed is: 1. A plurality of rostrus are arranged in parallel with the width direction of the furnace to form a row of the rostles, and a plurality of rows of rostles are arranged in the front-rear direction of the incinerator to form a stoker. At a suitable position, the thermal expansion amount absorbing means is provided in the row of the rostrut, and the thermal expansion amount absorbing means is located on both sides of the T-shaped fixed rostrut having a T-shaped cross section and the T-shaped fixed rostrut A movable side plate, and a biasing means for biasing the side plate in the row direction of the rostrul, wherein the side plate is fixed to the rostrut adjacent to the thermal expansion amount absorbing means of the incinerator. Hearth structure. 2. An upper shaft and a lower shaft are provided between the side plates on both sides, a link mechanism is pivotally supported on one end and the other end of the upper shaft and the lower shaft, and both ends of the link of the link mechanism are on both side plates. Is pivoted between the upper shaft and the lower shaft,
2. The hearth structure of the incinerator according to claim 1, further comprising an urging means in which a spring for urging both shafts toward the center is interposed.