JPS5956484A - Dismounting refractory lining material in dry coke quenching equipment - Google Patents

Abstract

PURPOSE:To dismount refractory lining material in dry coke quenching equipment without the need of setting up a scaffolding, by charging filling material in lumps into a coke oven from above down to the neighborhood of an oven opening and removing refractory material, while the level of the filling material is being lowered gradually. CONSTITUTION:Cold lump coke 13 is charged continuously into a coke oven from a charger 1 until the coke is filled with the filling material to an operating level 14 below an oven opening 2. Powdered coke is sprayed over the lump coke to flatten the surface and a sheet, etc. is laid to provide a foothold for operation. Dismounting of damaged refractory lining material is started from around the oven opening and the filled coke 13 is taken out by means of a cut-gate 5 so that the operation level 14 may be lowered. The dismounting operation is carried out for every descending level. As several batches of coke are taken out, the operation level is brought down to the oven bed level of a dust remover 15 (operation level 14a). Then dismounted waste bricks are carried out of the oven through a chute provided on the side wall of the dust remover. As the dismounting operation is repeated, the foothold level comes down to the level of a manhole 10 and dismounted wastes are carried out through the manhole 10. The operation is continued until it is completed at the bottom of the oven.

Description

DETAILED DESCRIPTION OF THE INVENTION In recent years, in order to save energy in coke ovens, dry coke extinguishing equipment for the purpose of recovering coke waste heat has come to be used instead of conventional water extinguishing.

In other words, this equipment puts red-hot coke that has finished carbonization into a fire extinguishing chamber, circulates inert gas, recovers sensible heat from the coke, and converts it into steam energy in a boiler.

The fire extinguishing chamber, which forms the main body of this fire extinguishing equipment, has a cylindrical shape with a concave upper and lower part, as shown in the vertical cross-sectional view of Fig. lined with refractory to withstand repeated reception of red-hot coke and gas cooling.

That is, in Fig. 1, 1 is a charging device installed at the top of the furnace body, which charges red hot coke from a coke truck transported by a hoist, 2 is a furnace mouth, and 3 is a charging device that is wound all around the inside of the furnace body. It is lined with refractory material and needs to be replaced every 7 to 8 years. 4 is an annular channel, 5 is a cut gate for cutting (discharging) cooled coke, 6 is a cutting feeder, 7 is a transport conveyor, and 8 is a cooling gas inlet.

Conventionally, in order to replace the lining refractories, as shown in Fig. 1, steel scaffolding 9 is sequentially assembled on the cut gate 5 at the bottom of the furnace body, and a working space is placed at the level of the Roman Hall 10 for entering and exiting the furnace body. A floor 11 was temporarily constructed, and a pipe scaffold 12 was assembled on the floor all the way to the top (namely, the furnace mouth), and the lining structure was dismantled.

This method requires a large amount of time and expense to install, dismantle, and remove strong scaffolding and floors. That is, a steel scaffolding 9 and a work floor 11 are temporarily constructed, then a pipe scaffolding 12 is erected to the top, and each scaffolding and floor is sequentially dismantled downward and the damaged refractory lining 3 is broken to reach the bottom. Because it required a complicated procedure,
Not only does it take a long time to dismantle the refractory lining, but it also takes a lot of man-hours just to prepare materials for each scaffold and floor, carry them in, set them up, and remove them, and the demolition costs including material costs are high. was huge. In addition, it is difficult to ensure safety because heavy objects are handled in a narrow room with a complex shape, and construction work on scaffolding is also dangerous.

The purpose of this invention is to shorten construction days, reduce construction costs and materials, and ensure safety by performing construction without temporary construction of scaffolding during dismantling work of lining refractories. The gist of this method is to fill a lumpy charge such as cold lump coke, coal lumps, ore lumps from the upper part of the furnace body in a trench near the furnace mouth, and then operate the cut-out device at the lower part of the furnace body to level the above-mentioned burdens. The present invention provides a method for dismantling a refractory lining inside a furnace of coke extinguishing equipment, in which the refractory lining is dismantled using the upper surface of the charge as a scaffold while lowering the refractory lining successively.

The dismantling method of this invention will be explained based on the drawings. In the vertical cross-sectional view of FIG. Light up and
Spread coke powder on top of this to make it flat, and then spread sheets, etc. to use it as a work scaffold.

(2) Start dismantling the damaged lining refractories from around the furnace mouth,
The filling coke 13 is cut out by the cut gate 5 so that the work level 14 is lowered in approximately 1.5 m increments, and the refractory dismantling work is performed every - level.

(3) After adjusting the working level, that is, cutting out the coke several times, the working level will drop to the hearth level (working level 14a) i of the dust remover 15 shown in Fig. Temporarily install a drop chute on the side wall of the reactor and transport it out of the reactor.

(4) After repeating the work level adjustment and refractory dismantling three times, the scaffolding level reaches the manhole 100 level (work level 14b) as shown in FIG.

(5) If the work level is lowered further, the dismantling work of the damaged lining refractory will be completed to the bottom of the furnace body.

The lump charge 13 to be filled into the furnace is not limited to cold lump coke, but may be any lump such as coal lumps or ore lumps that are easily available at steel plants (and even after use in the demolition work of this invention, May be used for any purpose.

Since this invention is a method as explained above, (1)
Temporary construction work for scaffolding and work floors is not required at all, and the dismantling period for refractory linings can be shortened to 2/6 of the conventional time.

(2) Temporary construction costs such as labor costs and material costs can be completely reduced.

(3) Safety can be ensured by completely eliminating dangerous work in temporary scaffolding, its dismantling/removal, and refractory dismantling work.

It has the following effects.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of the furnace body of coke extinguishing equipment, showing a conventional method for dismantling lining refractories. 2 and 3 are longitudinal sectional views illustrating the present invention in detail, with FIG. 2 showing the state immediately before the start of disassembly work, and FIG. 3 showing the state at the end of the dismantling work. In each figure, 1...charging device, 2...furnace mouth, 6...-lining refractory, 5...cutting device, 9...roman hole in and out of the furnace body, 13... Cold lump coke, 14... working level. Agent Patent Attorney Sanro Kimura Figure 1 Figure 2 Figure 3 [! 1 Continued on page 11 0 Inventor: Isamu Ishiyama 300 Kamiodanaka, Nakahara-ku, Kawasaki City NKK Company Housing □ ■Applicant: Shinagawa White Brick Co., Ltd. 631-1, 2-2 Otemachi, Chiyoda-ku, Tokyo

Claims (1)

[Claims] After filling a lumpy charge such as cold lump coke, coal lump, ore lump from the upper part of the furnace body up to the vicinity of the furnace mouth, the charging material level is gradually lowered by a cutting device at the lower part of the furnace body. A method for dismantling a refractory lining in a furnace of coke dry extinguishing equipment, the method comprising dismantling the refractory lining in a coke dry extinguishing equipment using the upper surface as a scaffold.