JP2587222Y2 - Side wall structure of refuse incinerator - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a side wall structure of a refuse incinerator for incinerating general waste and industrial waste.

[0002]

2. Description of the Related Art As a side wall structure of a conventional refuse incinerator,
Japanese Patent Publication No. 60-9210 is well known,
The side wall structure of this refuse incinerator will be described with reference to FIGS.

FIG. 4 shows a schematic configuration of a conventional incinerator in which an air-cooled plate brick is applied to a side wall, FIG. 5 shows a side wall portion on which an air-cooled plate brick is mounted, and FIG. The attached state is shown.

[0004] First, as shown in FIG. 4, the input refuse a is composed of a dry grate b, a combustion grate c and a post-combustion grate d.
It burns while being transported above, and the incineration ash is discharged to the conveyer tank e. Then, the side wall portion which is most likely to rise in temperature during combustion has an air-cooled plate structure equipped with an air-cooled plate brick f, and the other side wall portion g has a general brick structure.

[0005] As shown in Figs. 5 and 6, the air-cooled plate structure part has an air-cooled plate brick f having a paragraph at the center in the thickness direction and notched at a corner inside the incinerator. The support bolts j are inserted into the lattice support plates k arranged in a lattice pattern via the support members j, and are juxtaposed vertically and horizontally. The mounting bolts n are formed in the through holes formed by the notches m at the four corners of the adjacent air-cooled plate brick f. And the nut r provided on the brick support plate k is screwed into the mounting bolt n to hold the air-cooled plate brick f and air-cool the back surface of the air-cooled plate brick f.

[0006]

Here, since the calorific value of the refuse greatly fluctuates, the temperature in the incinerator, especially in the combustion zone, fluctuates greatly, for example, 1050 to 750 ° C. Therefore, the brick surface constituting the side wall constantly expands and contracts in accordance with fluctuations in the furnace temperature, even though the back surface is cooled by air.

However, in the above-mentioned conventional structure, the inside half of the incinerator of the air-cooled plate brick f is in close contact with each other, and the outside half of the incinerator is in direct contact with the brick support plate k and is fastened by the mounting bolts n at the four corners. Even if the air-cooled plate brick f and the brick support plate k expand and contract due to fluctuations in the incinerator temperature, they can only respond within a limited range and cannot freely expand and contract, and have a complicated structure. Dimensional accuracy and finished surface are difficult to obtain. For this reason, mutual interference occurs between the air-cooled plate bricks f and the brick support plate k, which causes cracks or peeling at the center portion, and causes the bolts to gradually drop off from the bolt fastening surfaces at the four corners. Was.

Further, when the incinerator is started after the shutdown, cooling air leaks into the incinerator from the gap formed between the air-cooled plate brick f and the brick support plate k and the defective portion of the air-cooled plate brick f, and In addition to hindering temperature rise, during normal operation, air leaking from the gap causes abnormal secondary combustion near the gap, creating a local high-temperature region, causing clinkers to occur. At times, there is a problem such as excessive combustion caused by the leaked air and burning out of the fire, which has been an obstacle when applied to facilities that perform intermittent operation.

[0009]

Means for Solving the Problems The side wall structure of the refuse incinerator of the present invention employs a system in which the side wall in the high temperature range of the refuse incinerator for incinerating refuse such as general waste and industrial waste is cooled by air on the back surface. In a side wall structure formed by brickwork, one bolt hole having a counterbore portion in which a bolt head is buried in an inner surface is drilled in a substantially central portion of each of the bricks constituting the side wall, and the brick has the bolt The bolts inserted into the holes are fixed to the flexible supporting member disposed on the back of the brick, while the gaps on the peripheral side surfaces of the adjacent bricks that are disposed in advance with the expansion allowance are provided. A stretchable sealing member inserted from the back side of the brick is provided, and an air-cooled portion on the back side of the brick has a plurality of high-temperature sections provided on the back side of the brick for each row of each brick in the vertical direction, and a furnace. Provided on the body casing side 2 common partitioned into a low-temperature portion that is
It has a layered structure.

[0010]

[Function] A suitable expansion allowance is taken between the bricks, and these bricks are fixed to the flexible supporting material by bolts at the center portion. By disposing a sealing member having
Freedom of expansion and contraction movement of bricks and mounting bolts.

[0011]

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

FIGS. 1 to 3 show a schematic structure of a side wall structure of a refuse incinerator according to the present invention.

In the drawing, reference numeral 1 denotes an air-cooled plate brick main body, and a bolt hole 2 having a counterbore 2a in which a head portion of a mounting bolt 6a is buried is formed at an inner central portion from an inner surface to a back surface. The air-cooled brick body 1 is made of, for example, silicon carbide having a high thermal conductivity.

Reference numeral 3 denotes a furnace body outer plate provided on the back of the air-cooled plate brick main body 1. The furnace body outer plate 3 blocks the back of the air-cooled plate brick main body 1 from the outside air.

A plurality of partition plates 4 made of, for example, H-shaped steel are provided on the back of the air-cooled slab brick body 1 to separate and send the flow of cooling air for each row of the air-cooled slab brick body 1 in the vertical direction.
Are installed in parallel, and an air cooling plate casing 9 is attached to the outside of the partition plate 4 to divide the rear surface of the side wall into an outer common first air layer 10 and an inner plurality of second air layers 11. ing.

Therefore, when air for cooling is supplied from the upper part of the first air layer 10, the air is supplied to the partition plate 4 via a distribution valve (not shown) located below the first air layer 10. After the separated second air layer 11 rises to sequentially cool the entire back surface of the air-cooled slab brick 1, it is discharged from above. In addition,
The discharged air may be used for residual heat.

The first air layer 10 is a passage for cooling air as described above, and also plays a role of insulating the second air layer 11 whose temperature rises.

On the legs of the partition plate 4, flexible support members 5 such as spring steel are arranged on the air-cooled plate brick main body 1 at intervals in consideration of the expansion allowance. And
After the mounting bolts 6a inserted into the bolt holes 2 of the air-cooled slab brick body 1 are inserted through the support members 5, the two are fixed together with the nuts 6b, so that the air-cooled slab brick main body 1 is connected to another adjacent air-cooled plate. It is separated from the brick body 1 by the amount of the expansion allowance and is supported so as to be stretchable. Thus, the air-cooled brick body 1 and the mounting bolts 6a can freely cope with expansion and contraction movements, and the air-cooled brick body 1 is not damaged by thermal stress.

Further, a T-shaped or flat sealing plate 7 and an air-cooling plate brick sandwiching the sealing plate 7 are provided on the outer portion of the incinerator at the expansion allowance formed between the peripheral side surfaces of the adjacent air-cooling plate brick main bodies 1. A sealing member composed of a sealing member 8 having an L-shaped cross section and having elasticity and disposed from the shoulder to the peripheral side surface of the main body 1 is interposed. From leaking into the incinerator.

The space inside the incinerator formed by the sealing plate 7 and the sealing material 8 is filled with a heat insulating material 12. The heat insulating material 12 is filled from the inside of the incinerator when the construction work is completed.

Further, the counterbore 2a of the bolt hole 2 in which the head of the mounting bolt 6a is disposed is filled with a refractory material 13 to protect the mounting bolt 6a from the high temperature in the incinerator and to attach the mounting bolt 6a. To prevent slipping.

As described above, the air-cooled plate brick main body 1 has a simple structure, so that the finished surface can be smooth and the finished surface is smooth. In addition, since the back surface has a relatively small amount of expansion and contraction, the air-cooled plate brick can be entirely sealed. The sealing performance is dramatically improved.

The air-cooled plate brick main body 1 is not limited to silicon carbide, but may be applied to general clay or alumina brick.

[0024]

[0025]

Further, by forming the portion filled with the heat insulating material 12 with the sealing material 8, the heat insulating material 12 can be made unnecessary.

The support member 5 is not limited to spring steel, but may be a general steel material.

[0028]

As described above, according to the present invention, the bricks are fixed to the supporting material supporting the back surface of each brick at the central portion by taking an appropriate expansion allowance between the bricks. Since the material is flexible, the expansion and contraction movements of the brick and the fixing bolt due to the heat fluctuation are free, and the brick is not damaged by cracks, peeling or missing due to thermal stress. Therefore, the sealing performance of the entire brick is greatly improved in combination with the back sealing method using a sealing member made of a sealing material and a sealing material inserted from the back of the brick to the peripheral side surface of the brick. Therefore, leakage of cooling air into the furnace hinders rise in furnace temperature during startup, local rise in furnace temperature during normal operation, resulting in clinker adherence to the furnace wall or insufficient cooling air flow, and during fire It is possible to prevent troubles such as excessive combustion, and it is effective not only for all continuous operation but also for incineration facilities with intermittent operation that repeats burning, shutdown, and start-up operation.

Further, since the structure of the air-cooled plate brick is simple, it is easy to manufacture, the dimensional accuracy is improved, and the finished surface is smooth. As a result, not only can production costs be reduced,
Brick installation or replacement work is facilitated, and site construction costs and work days can be reduced. Further, since the air-cooled portion has a two-layer structure, the outer air layer serves as a heat insulating layer for the inner air layer, so that the cost of the heat insulating material can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view showing a schematic configuration of a side wall structure of a refuse incinerator according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a vertical sectional side view showing an overall schematic configuration of a conventional refuse incinerator in which an air-cooled plate type brick is applied to a side wall.

FIG. 5 is an enlarged view showing a side wall portion on which a conventional air-cooled plate brick is mounted.

FIG. 6 is a cross-sectional view showing a fastening state of a conventional air-cooled plate brick.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air-cooled plate brick 2 Bolt hole 2a Counterbore part 5 Support material 6a Mounting bolt 7 Seal plate 8 Seal material 13 Fireproof material

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-233908 (JP, A) JP-A-4-309709 (JP, A) JP-A 1-1117449 (JP, U) JP-A 57- 178947 (JP, U) JP-B 60-9210 (JP, B2) JP-B 46-31901 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F23G 5/00-5 / 08 F23G 5/44

Claims (1)

(57) [Scope of request for utility model registration] 1. A side wall structure in which a side wall in a high temperature range of a refuse incinerator for incinerating refuse such as municipal waste or industrial waste is formed by brick-laying a system in which a back surface is air-cooled. At a substantially central portion of the brick, one bolt hole having a counterbore portion in which a bolt head is buried is bored on an inner surface, and the brick is inserted into the bolt hole.
The fixing device is fixed to a flexible supporting member disposed on the back surface of the brick by a bolt , while the peripheral side space of each adjacent brick disposed with a pre-expansion allowance is provided from the rear side of the brick. seal member Ru is disposed with the inserted elastic
At the same time, the air cooling part on the back of the brick is
Multiple high-temperature sections provided on the back of the brick for each row, and a furnace
It is divided into a common low-temperature part provided on the body casing side.
The side wall structure of a refuse incinerator characterized by having a two-layer structure.