JPS61223087A - Method for preventing leak of gas from door frame of coke oven - Google Patents

Abstract

PURPOSE:To prevent the leak of gas from a coke oven economically and effectively, to shorten the time necessary for the complete repair and to enable partial mending of the oven door frame, by filling a refractory mortar in a space between a protective plate and a coke oven door frame fixed to the plate. CONSTITUTION:A refractory mortar M is filled in the space S between the protective plate 6 and the frame 7 attached to the end combustion chamber of a coke oven 1 using a blasting machine or a trowel. The gap is sealed by this procedure to prevent the leak of gas. If a slight gas leak occurs in the baking operation of an empty even after the filling of the refractory mortar, the leak can be stopped by applying the refractory mortar to the leaking part. When there occurs considerable leak, the filled refractory mortar is removed to a relatively large extent and a refractory mortar is filled again into the space.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention is intended to prevent gas leakage from the gap between a protective plate attached to the end of a coke oven wall and a kiln mouth frame to which a furnace lid fixed to the protective plate is attached. Regarding how to prevent this.

[Prior art] - As shown in Fig. 1 (a cross-sectional plan view showing the coke oven kiln inlet), the coke oven kiln inlet is provided with a protective plate ( 6) Attach the protective plate (6)
Provide a gap (S) between the frames (7) and (8).
), and the frame (7) is fitted with a K furnace lid (5) to seal the kiln opening (4) of the carbonization chamber (3).

Conventionally, a method to prevent gas leakage from the gap (S) between the coke oven kiln mouth frame and the protective plate was to fill the gap (S) with packing material such as asbestos yarn or aluminum foil yarn. /Shits &.

Problems to be Solved by the Invention The coke oven (1) has a carbonization chamber (1) after discharging the carbonized coke.
3) Perform a cavity at the ninth stage to burn off the carbon adhering to the inner wall.

At this time, the frame (7) becomes distorted due to temperature changes, gradually compressing the packing material of the asbestos yarn inserted into the gap (S), and gas leakage occurs at the core within 3 to 4 months. death,
Each time, the packing material must be replaced with a new one, and replacing the packing material takes approximately 40 minutes per kiln, which poses a problem of poor economic efficiency and workability.

Means for Solving the Problems The present invention provides a method for preventing gas leakage from the gap between a coke oven kiln mouth frame and a protective plate. %/p)V
The main subject of this paper is a method for preventing gas leakage from the coke oven kiln opening frame.

In other words, when sealing the gap between the protection plate and the frame, instead of using the conventional method of driving in a sealing material, heat-resistant -1:I
By using the v-metal filling method, the time required for full-scale repair can be shortened, and partial repair can be performed, thereby solving the above-mentioned problems.

Function This invention seals the gap (S) between the protection plate (6) provided on the end combustion chamber wall of the coke oven (1) and the frame (7) by filling the gap (S) with heat-resistant mortar tv (M). Since this method prevents gas leakage from the core, it is easy to work with, and the time required for complete repair is about 20 minutes compared to the conventional 172. Even if a gas leak occurs due to opening the cavity, if it is a small gas leak, all you need to do is spray a layer of heat-resistant mold over the core.
If there is a large gas leak, the heat resistance of the core should be increased/L'(M
)? All you have to do is remove a slightly larger piece and refill it with heat-resistant mortar, and gas leaks can be easily prevented by partial repair.

Note that filling and spraying of the heat-resistant mortar may be carried out using an existing spraying machine, trowel, or the like.

Example: K1203 was used instead of asbestos yarn in the gap between the protective plate attached to the end combustion chamber wall of a coke oven with an oven height of 6 m and the frame.
: 57%, 5i02: 37% heat-resistant mortar A/ with 10% moisture added, and was sprayed using a machine at a rate of 40 pieces per kiln.

The time required for filling was 20 minutes per kiln, which is half the time required for replacing asbestos yarn (940 minutes per irradiation).
So six nine. Further, even though 6 months have passed since filling with the heat-resistant filter, no gas leakage was observed and the seal resistance was extremely good. On the other hand, in the case of the conventional method in which asbestos yarn was inserted and sealed, gas leakage occurred in about half of the furnace block four months after the asbestos yarn was replaced, and the asbestos yarn had to be replaced again.

Effects of the Invention As mentioned above, the method of this invention prevents gas leakage from the gap between the protective plate and the frame of a coke oven by filling the heat-resistant mortar with asbestos yarn, aluminum foil yarn, etc. Compared to the conventional method of hammering, workability is much better, the time required for full-scale repair can be cut in half, the material cost is low, gas sealing properties are good, and partial repair is possible. It has excellent economic efficiency and workability, and is highly effective in preventing gas leakage from the coke oven kiln mouth frame.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional plan view showing the coke oven kiln opening. In the figure, 1... Coke oven, 4... Kiln mouth, 6... Protective plate, 7... Frame, M... Heat resistant mortar, S...
··gap.

Claims (1)

[Claims] A method for preventing gas leakage from a gap between a coke oven oven mouth frame and a protective plate, characterized in that a gap between the protective plate and a frame fixed to the protective plate is filled with heat-resistant mortar. How to prevent gas leaks.