A method for repairing the wall of coke oven carbonization chamber

Abstract

The present invention relates to a method for repairing the wall of a coke oven carbonization chamber, which belongs to the technical field of coke oven carbonization chamber maintenance, comprising: S1, removing coke from the carbonization chamber of the damaged wall in the middle and late stages of coking; S2, placing a triangular heat-insulating frame wrapped with asbestos felt according to the position of the vertical fire channel where the damaged part of the repaired wall is located; pasting asbestos felt on the wall surface of the undamaged part of the wall; S3, inserting a ceiling tool from the upper part of the vertical fire channel to hang the upper part of the disassembled damaged wall; S4, digging a live masonry opening at the bottom of the carbonization chamber opposite the vertical fire channel; S5, dividing the damaged wall surface from bottom to top into three sections in the vertical direction, first selecting the wall surface of 1 / 3 of the height from the lower part for disassembly and masonry; and then masonry the remaining two sections in sequence. The present invention adopts a high-direction segmentation method to repair large-scale damage to the wall of the coke oven carbonization chamber, which is time-saving, easy to operate, and has a high safety factor. It reduces the labor intensity of thermal engineering management personnel, accumulates rich experience in furnace body maintenance, and improves furnace body environmental protection control.

Description

Technical Field

[0001] The invention belongs to the technical field of coke oven carbonization chamber maintenance, and in particular relates to a method for repairing a coke oven carbonization chamber wall. Background Art

[0002] During the continuous coke production process of the coke oven, the carbonization chamber is subjected to the impact of rapid temperature changes during coal loading and coke discharge, the friction of the coke pushing rod during coke pushing, and the extrusion of coke. The masonry of the carbonization chamber is affected by factors such as the mechanical force of pushing coke and the stress generated by the periodic and drastic changes in furnace temperature. Defects such as erosion, cracking, and dents appear in some masonry, especially in the furnace head. These inevitable changes can also slow down the rate of furnace damage if properly maintained.

[0003] Typically, when a furnace reaches 10 years or more, a deteriorated layer forms on the surface of the furnace wall bricks. As the deterioration and erosion deepen, the furnace wall becomes severely damaged. The damage typically begins at the furnace head and then spreads toward the center. Initially, the furnace wall exhibits pitting, unevenness, small vertical cracks, and a "honeycomb" pattern on both sides of the furnace head, developing into a more severe condition further down. In many cases, this directly blocks the brick gas ducts and ramps, severely affecting the temperature of the vertical fire channel. This leads to uneven maturation of the coke cake and the frequent occurrence of undercooked coke, creating challenges across all stages of the coking process. In particular, severe leakage from the furnace wall causes black smoke to billow from the chimney, resulting in excessive online data and potentially causing environmental risks.

[0004] The original repair method, which involved completely demolishing the old wall at once and then rebuilding it, was extensive and time-consuming. This resulted in the furnace roof and walls being too cold, causing bricks to fall off and the masonry to sink, further exacerbating the wall deformation. Furthermore, the repairs were ineffective, and the period of sustained normal production was short, leaving the original problem unresolved. To minimize damage to the walls, it was crucial to develop a new method for repairing the carbonization chamber walls of the coke ovens. Summary of the Invention

[0005] In order to solve the technical problems existing in the known technology, the present invention provides a method for repairing the furnace wall of the carbonization chamber of the coke oven, which adopts a high-direction segmentation method to repair large-area damage of the furnace wall of the carbonization chamber of the coke oven, thereby improving work efficiency and safety.

[0006] The object of the present invention is to provide a method for repairing a coke oven carbonization chamber wall, which at least comprises:

[0007] S1. In the middle and late stages of coking, remove the coke from the carbonization chamber of the sick furnace wall;

[0008] S2. Place a triangular heat-insulating frame covered with asbestos felt in the vertical fire channel of the damaged part of the furnace wall to be repaired; and affix the asbestos felt to the undamaged part of the furnace wall.

[0009] S3. Insert the ceiling tool from the upper part of the vertical fire channel and hang the upper part of the damaged wall;

[0010] S4. Dig a hole for bricklaying at the bottom of the carbonization chamber, opposite to the fire channel;

[0011] S5. Divide the damaged wall into three sections from bottom to top. First, select 1 / 3 of the wall at the bottom and dismantle it for masonry; then, build the remaining two sections in sequence.

[0012] Preferably, the asbestos felt is aluminum silicate asbestos felt.

[0013] Preferably, the method further comprises S6, spraying the built wall surface with a spraying machine.

[0014] Preferably: After the carbonization chamber furnace wall is repaired, a carbonization chamber wall heating plan needs to be formulated and the temperature needs to be raised gradually.

[0015] The advantages and positive effects of the present invention are:

[0016] By adopting the above technical solution: the present invention adopts a high-directional segmented dismantling method, which is most suitable for moderate or above damage to the furnace wall. It is time-saving, easy to operate, and has a guaranteed safety factor. It reduces the labor intensity of thermal management personnel, accumulates rich experience in furnace maintenance, and improves the environmental protection control of the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the segmented repair of the coke oven wall using the high-direction segmented method in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0019] See also Figure 1 A method for repairing the walls of the carbonization chamber of a coke oven involves removing the coke from the damaged wall in the middle or late stages of coking. A triangular insulation frame wrapped with asbestos felt is then placed according to the location of the vertical flue where the damaged portion of the wall is located. Aluminum silicate asbestos felt is applied to the intact wall surrounding the damaged portion of the wall. A ceiling tool is inserted from the upper part of the vertical flue to lift the upper part of the disassembled damaged wall. A "live masonry opening" is dug at the bottom of the carbonization chamber opposite the vertical flue to facilitate the removal of debris such as refractory bricks that have fallen in during the repair process. The damaged wall is divided into three sections from bottom to top in height, with the lower 1 / 3 of the wall selected for disassembly and masonry work first.

[0020] Then the remaining two sections are laid in sequence, which can shorten the settling time of the upper refractory bricks and ensure the repair quality. This invention is suitable for repairing damaged parts when the furnace wall of the carbonization chamber of the coke oven is moderately damaged or above.

[0021] In this application, “high direction” refers to the vertical direction;

[0022] ① is to extend the ceiling tool into the fire hole from the top of the furnace and lift the upper part of the damaged surface.

[0023] ② When laying bricks, a "live brick opening" is reserved at the bottom of the carbonization chamber wall to facilitate the removal of debris after completion, and the "live brick opening" is blocked after cleaning.

[0024] The specific implementation process of this preferred embodiment is as follows:

[0025] ⑴ Prepare tools and materials such as refractory bricks, aluminum silicate asbestos felt, glass water, iron chisels, sledgehammer, trowel, refractory clay, etc.

[0026] ⑵ In the middle and late stages of coking, the carbonization chamber of the furnace wall to be repaired is subjected to coke removal operations, exposing the wall to be repaired.

[0027] (3) Place a triangular heat-insulating frame wrapped with aluminum silicate asbestos felt according to the location of the vertical fire channel where the damaged part of the furnace wall is located. Stick aluminum silicate asbestos felt on the good wall around the damaged part of the furnace wall.

[0028] ⑷Insert the ceiling tool from the upper part of the vertical fire channel and hang the upper part of the damaged wall.

[0029] ⑸ Build a "live masonry opening" at the bottom of the carbonization chamber opposite the fire channel to facilitate cleaning out refractory bricks and other debris that fell in during the repair process after the wall is repaired.

[0030] (6) Divide the damaged wall into three sections from bottom to top. First, select 1 / 3 of the wall from the bottom and start the masonry. Then, build the remaining two sections in sequence. This will shorten the settlement time of the upper refractory bricks and ensure the quality of the repair.

[0031] ⑺After removing the damaged brick parts, it is necessary to clean and clear the combustion chamber ramp and brick gas duct.

[0032] ⑻ After rebuilding the furnace wall at the damaged brick part, remove the insulation frame and spray the built wall tightly with a sprayer.

[0033] ⑼ Develop a plan for heating the carbonization chamber walls. When supplying gas, gradually increase the amount of gas supplied. The furnace walls need to be heated up gradually. Do not increase the gas supply all at once to quickly heat them up.

[0034] In the preferred embodiment described above, the damaged wall is divided into three sections from bottom to top (depending on the actual situation). First, 1 / 3 of the wall height is selected from the bottom to be dismantled and rebuilt. The remaining two sections are then rebuilt in sequence. This can shorten the settling time of the upper refractory bricks and ensure the quality of the repair.

[0035] This application divides the damaged wall into three sections from bottom to top. First, select 1 / 3 of the wall height from the bottom to dismantle and rebuild it, and then build the remaining two sections in sequence.

[0036] This application reserves a "live brick opening" at the bottom of the carbonization chamber opposite the fire channel, so that after the wall is repaired, it is convenient to take out the refractory bricks and other debris dropped in during the repair process.

[0037] The present application requires that the refractory bricks and other debris that have fallen into the "live brick opening" be cleaned up at the bottom of the carbonization chamber, which is opposite to the fire channel, before the "live brick opening" can be blocked.

[0038] This application requires a shotcrete machine to be used for strict spraying operations on the built wall surface.

[0039] After the carbonization chamber furnace wall is repaired, this application needs to formulate a carbonization chamber wall heating plan, which needs to be heated gradually, and cannot be heated quickly by increasing the gas supply at one time.

[0040] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A method for repairing the wall of a coke oven carbonization chamber, characterized in that: include: S1. In the middle and late stages of coking, remove the coke from the carbonization chamber of the sick furnace wall; S2. Place a triangular heat-insulating frame covered with asbestos felt in the vertical fire channel of the damaged part of the furnace wall to be repaired; and affix the asbestos felt to the undamaged part of the furnace wall. S3. Insert the ceiling tool from the upper part of the vertical fire channel and hang the upper part of the damaged wall; S4. Dig a hole for bricklaying at the bottom of the carbonization chamber, facing the fire channel; S5. Divide the damaged wall into three sections from bottom to top. First, select 1 / 3 of the wall at the bottom and dismantle it for masonry; then, build the remaining two sections in sequence.

2. The method for repairing a coke oven carbonization chamber wall according to claim 1, characterized in that: The asbestos felt is aluminum silicate asbestos felt.

3. The method for repairing a coke oven carbonization chamber wall according to claim 1 or 2, characterized in that: It also includes S6, using a shotcrete machine to spray the built wall surface.

4. The method for repairing a coke oven carbonization chamber wall according to claim 3, characterized in that: After the carbonization chamber furnace wall is repaired, a carbonization chamber wall heating plan needs to be formulated and the temperature needs to be raised gradually.

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