JPH0299590A - Apparatus for mending coke oven by melt spraying - Google Patents

Abstract

PURPOSE:To increase the high-temperature strength and cooling efficiency of a boom even having a long length and to enable the mending in hot state over a long period by connecting water-cooled pipes with a pair of steel sheets lined with a heat-insulation material and using a boom in the cooled zone formed by the above components. CONSTITUTION:An upper and a lower water-cooled pipes 1 placed interposing a prescribed gap are connected through a pair of steel plates 10 lined with a heat-insulation material 13 to form a zone cooled with air. A boom provided with a main pipe containing a feeding pipe for oven-mending material and a camera cable, etc., is placed in the cooled zone to obtain the objective melt- spray mending apparatus for coke oven.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a repair device for a carbonization chamber in a coke oven.

(Prior art) As a furnace for producing metallurgical coke, a room-furnace type coke production furnace is suitable for mass production, easy quality control (and relatively effective use of a huge amount of heat). It has been widely adopted because it is used in

However, since coal carbonization is indirect heating through the side walls of brickwork, long-term use may cause coke to fuse with the bricks, collapse of the brickwork side walls, or damage the side walls when taken out of the kiln. Therefore, the life of a normal reactor is said to be about 20 years.

Since reloading bricks in a coke oven requires a huge amount of money and time, many proposals have been made for hot repair methods for coke ovens, and they are being put into practical use, albeit on a small scale.

For example, a thermal spray burner is provided at one end of a water-cooled long cylinder into which a supply pipe for combustible gas, oxygen, and refractory powder is inserted, and an operating handle is provided at the other end, so that the aforementioned water-cooled long cylinder can be freely moved to a support frame. Utility Model No. 52-36703, which was installed on a movable trolley so that it could tilt and rotate freely, the repair burner was removably attached to the coke guide car or pusher car, and the burner could be moved forward and backward, rotated, JP-A-53-82802 is a cassette-type thermal spray repair machine that can be tilted freely.A powder spray nozzle is installed on one side of the cart so that it can move up and down, and on the other side there is a heat source gas cylinder. Utility Model No. 5386455, which is characterized by being equipped with a thermal spray burner, is mounted on a trolley so that it can move up and down and back and forth, and
Utility Model No. 61-159 in which a cough spray burner was suspended and supported by a chino via a hoisting machine through the coal charging hole at the top of the furnace.
345 etc. are known.

(Problems to be Solved by the Invention) As mentioned above, the hot repair equipment for coke oven carbonization chambers that has been implemented in the past requires the operator to manually inspect an area within 1 to 2 meters from the kiln mouth with the naked eye. Most of the work is carried out by inserting the boom into the center of the furnace, confirming the location to be repaired, and then using a device that can accurately and efficiently repair a wide area, especially the functional structure of the boom body. has not yet been developed.

The present invention was created in view of the current situation, and
In particular, it concerns the structure of a long boom, and the structure is suitable for feeding thermal spray material, combustion gas, oxygen, monitoring camera cables, etc. to the tip of the boom while avoiding the heat inside the kiln. The purpose is to provide.

"Structure of the Invention" (Means for Solving the Problems) In order to achieve the above-mentioned object, the present inventors installed water cooling pipes vertically at a predetermined interval, and installed a heat insulating material between them. It is characterized by the use of a boom that is connected by two steel plates to form an air cooling area, and has a main pipe that houses the supply pipe for materials for repairing the inside of the furnace and the cable for the camera, etc. We proposed a coke oven thermal spray repair device to Gei. By using this device, despite the long boom, it has excellent heat resistance and cooling efficiency, and can perform hot repairs over a long period of time.

(Function) The feature of the thermal spray repair apparatus for a coke oven carbonization chamber of the present invention is that two water-cooled pipes are arranged vertically at a predetermined interval, and the space between them is connected by two steel plates coated with a heat insulating material. A cooling area is formed by air, and in this space, the furnace repair materials (refractory powder for thermal spraying, propane gas, oxygen, cooling water for the tip),
This is because a main pipe is provided to accommodate cables for surveillance cameras, etc., and the predetermined interval refers to the volume that accommodates this main pipe.

The structure has water-cooled pipes on the top and bottom, and the cross section is long in the vertical direction. This allows for sufficient cooling to the tip of the long boom, which can accommodate narrow spaces in the middle, and also ensures the necessary rigidity to support the weight of the main pipe. In addition, when forming a double tube with a cross section close to a right circle like a normal water cooling jacket,
This is to avoid the shortening of the distance to the side wall and the increased exposure to radiant heat from the side wall of the kiln.

In addition, in the present invention, the main pipe is rotatably set at the rear end of the boom section with a sprocket and chain using a hydraulic motor so that the spraying area can be repaired at any location from the entrance to the center of the kiln. It is.

(Example) Total length of boom 12,800m, 1 upper and lower water cooling pipe each
25A, main pipe (storage of camera cable pipe, oxygen supply pipe, thermal spray material supply pipe, etc.) 90A, water supply boom
: 4.6T/H 〃 Tip box: 1.4T/H Temperature inside the furnace Near 30~760"C Temperature inside the main pipe: Maximum 170'L: Temperature inside the tip box: Maximum 40"C Inlet temperature inside the furnace: 4
50-520'C Temperature of cooling waste water: Maximum 60'
The C wire cable used was one that could withstand up to 250''C.

FIG. 1 shows a boom of a thermal spray repair apparatus according to the present invention, which has a long main pipe 2 between which upper and lower water-cooled pipes 1 house supply pipes for repair materials, camera cables, etc. A long boom 3 is shown. The boom is moved forward and backward by a binion (not visible in the figure) driven by a hydraulic motor 4 and a rack 5 (partially omitted) fixed to the top of the boom. Guide roller 6
are provided, one pair each at the front and rear. The lower end of a hydraulic cylinder 8 is fixed to a shaft on the platform 7 of the truck, and the - end is fixed to a lower end of a support frame 9 that supports the entire weight of the boom.
Around 1, the bevel angle can be changed. Figure 2 shows the first
This is a cross-sectional view of Figure A-A, and shows the upper and lower guide rollers 6.
The boom 3 of the present invention is shown supported by a rack 5, a water cooling pipe 1 and a main pipe 2, and two steel plates 10 with a heat insulating material 13 on the inside. ing. Further, a compressed air pipe 11, which will be described later, is provided inside the upper water cooling pipe 1.

FIG. 3 shows a cross-sectional view of the tip of the inner boom 3 of the thermal spray repair apparatus of the present invention, in which the main pipe 2 is located between the upper and lower water-cooled pipes 1, and the water-cooled box 12 is fixed at the leading edge. This water-cooled box houses an in-furnace monitoring camera, thermal spray burner, etc., and is rotated together with the main pipe by a hydraulic motor, sporokerato, and chain at the rear end of the boom so that the thermal spraying direction can be changed.

Moreover, in the upper water cooling pipe 1, there is provided an external compressed air pipe 11 for cooling the space between the upper and lower water cooling pipes and the main pipe. After being introduced as cooled compressed air and cooling the space, it is released into the atmosphere from the rearmost end of the booth 1.

In addition, in FIG. 3, the piping inside the water cooling box and the main pipe is omitted in the drawing.

"Effects of the Invention" As explained in detail above, the device of the present invention uses a huge boom that can repair up to the center of the coke oven, but the two upper and lower water cooling pipes improve its cooling effect and rigidity. In addition, since we use effective cooling means such as introducing compressed air to cool the main pipe through air piping that passes through the water-cooled pipe, hot repairs can be carried out with peace of mind. can be done.

[Brief explanation of the drawing]

FIG. 1 is a side view of the boom of the present invention mounted on a pedestal;
FIG. 2 shows a sectional view taken along the line AA in FIG. 1, and FIG. 3 shows a schematic sectional view of the boom tip. 1: Water cooling pipe 2: Main pipe 3; Boom 4: Hydraulic motor 5 Nirakku
6: Guide roller 7: Cart frame, 8
: Hydraulic cylinder 9: Lower end of support frame 10: Steel plate 11: Compressed air piping 12: Water cooling box 13: Insulation material

Claims (1)

[Claims] Water-cooled pipes are installed at a predetermined distance above and below, and are connected with two steel plates coated with heat insulating material to form an air-cooled area, where the supply pipe for the materials for repairing the furnace and the camera are installed. A coke oven thermal spray repair device characterized by using a boom equipped with a main pipe that houses cables, etc.