Local cooling method for patching and taking bricks in coke oven carbonization chamber

Abstract

The invention discloses a local cooling method for patching and taking bricks of a coke oven carbonization chamber, and relates to the field of repairing and digging operation of coke oven carbonization chambers. The invention aims to solve the technical problems of long construction period and low production efficiency due to adoption of whole cooling of full-row vertical flues in the minor repair patching operation of the combustion chamber at present. The method comprises the following steps: 1, confirming a brick picking point location of a damaged flame path; secondly, the damaged flame path is cooled, and heat preservation is conducted on the furnace wall through heat preservation cotton; thirdly, the broken flame path is subjected to wall smashing, patching and brick taking, and then building and repairing are conducted; and fourthly, after repairing in the third step is completed, heating is conducted. According to the method, the damaged flame path is accurately maintained, so that the use of materials is reduced, and meanwhile, the workload of constructors is reduced. And after maintenance is completed, heat transfer is conducted on the maintained vertical flame path through the unmaintained vertical flame path, and the temperature rise time of the vertical flame path is shortened. The method is used for maintaining the coke oven carbonization chamber.

Description

Technical Field

[0001] The invention relates to the field of repair and excavation operations of a coke oven carbonization chamber. Background Art

[0002] During minor repairs and patching operations in combustion chambers, the industry typically adopts a strategy of overall cooling across the entire vertical fire channel. This requires lowering the temperature of the entire furnace to ensure safe operation. A significant issue is the slow heating rate during repairs, requiring the furnace temperature to be gradually raised to the level required for normal production. After the wall patching is completed, the entire heating process takes approximately six days, reaching a temperature of 650-700°C before ignition can begin. This impacts production efficiency, wastes materials, and prolongs the construction cycle. This new method of localized cooling for patching operations is particularly important. Summary of the Invention

[0003] The invention aims to solve the technical problem that in the current minor repair and patching operation of the combustion chamber, the whole row of vertical fire channels is cooled as a whole, the construction period is long, and the production efficiency is low.

[0004] The invention discloses a local cooling method for excavating and patching bricks when bricks fall off seriously in the vertical fire channel of a coke oven carbonization chamber and need to be removed. The method involves technologies such as furnace temperature control, furnace wall leveling, carbonization chamber excavation and patching brick removal technology, and material selection.

[0005] A method for local cooling of a coke oven carbonization chamber by digging and patching bricks is specifically performed in the following steps:

[0006] 1. Confirm the location for digging and repairing bricks in the damaged fire channel;

[0007] 2. Push all the coke out of the carbonization chamber, cool the damaged fire channel to 500-600℃, and use thermal insulation cotton to insulate the undamaged fire channel wall;

[0008] 3. Break down the wall of the damaged fire channel. After breaking down 2-3 layers to create a working surface, dig and repair the interior of the fire channel by taking bricks, and then build the repair work surface;

[0009] 4. After step 3 is repaired, heat up.

[0010] Furthermore, the brick taking points in step 1 include the furnace number, fire channel position and layer number range.

[0011] Furthermore, in step 2, the large cover on the furnace and the large cap of the riser are opened and the flap is closed to cool the damaged fire channel.

[0012] Furthermore, in step 2, when the damaged fire channel is cooled to 500-600° C., the undamaged fire channel is insulated to leave a working surface.

[0013] Furthermore, in step 2, the thermal insulation cotton adopts silicate board and is bonded with glass water.

[0014] Furthermore, in step three, the masonry repair is carried out using silica bricks, silica refractory mud and phosphoric acid;

[0015] The mass content of silicon dioxide in the silica brick is 98%; the mass concentration of phosphoric acid is 85%.

[0016] Furthermore, in step three, supporting channel steel and turnbuckle bolts are used as needed.

[0017] Beneficial effects of the present invention:

[0018] 1. This method pushes all the coke out of the carbonization chamber, insulates the undamaged fire channel with insulation cotton material, fixes the insulation material to the wall of the carbonization chamber with iron wire, and removes it after the maintenance is completed.

[0019] 2. This method reduces the use of materials and the workload of construction workers by accurately repairing the damaged fire channel.

[0020] 3. After the maintenance is completed, this method transfers heat to the repaired vertical fire channel through the unrepaired vertical fire channel, thereby reducing the heating time of the vertical fire channel.

[0021] The invention is used for the maintenance of the carbonization chamber of a coke oven. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of step 1 of the embodiment;

[0023] Figure 2 This is a schematic diagram of step 2 of the embodiment;

[0024] Figure 3 This is a schematic diagram of step three of the embodiment;

[0025] Figure 4 This is a schematic diagram of step four of the embodiment. DETAILED DESCRIPTION

[0026] Specific embodiment 1: This embodiment provides a method for local cooling of a coke oven carbonization chamber by digging and patching bricks, specifically by the following steps:

[0027] 1. Confirm the location for digging and repairing bricks in the damaged fire channel;

[0028] 2. Push all the coke out of the carbonization chamber, cool the damaged fire channel to 500-600℃, and use thermal insulation cotton to insulate the undamaged fire channel wall;

[0029] 3. Break down the wall of the damaged fire channel. After breaking down 2-3 layers to create a working surface, dig and repair the interior of the fire channel by taking bricks, and then build the repair work surface;

[0030] 4. After step 3 is repaired, heat up.

[0031] Specific embodiment 2: This embodiment differs from specific embodiment 1 in that the brick taking point in step 1 includes the furnace number, the fire channel position and the range of the number of layers. Other aspects are the same as specific embodiment 1.

[0032] Specific embodiment 3: This embodiment differs from specific embodiments 1 or 2 in that: in step 2, the furnace cover and the riser cap are opened and the flap is closed to cool the damaged fire channel. Other aspects are the same as specific embodiments 1 or 2.

[0033] Specific embodiment 4: This embodiment differs from specific embodiments 1 to 3 in that in step 2, when the damaged flue is cooled to 500-600°C, the undamaged flue is kept warm, leaving a working surface. Other aspects are the same as specific embodiments 1 to 9.

[0034] Specific embodiment 5: This embodiment differs from specific embodiments 1 to 4 in that: in step 2, the thermal insulation cotton is made of silicate board and is bonded with glass water. Other aspects are the same as specific embodiments 1 to 4.

[0035] Specific embodiment 6: This embodiment differs from specific embodiments 1 to 5 in that: Step 3 masonry repair uses silica bricks, silica refractory mud and phosphoric acid;

[0036] The silica brick has a silica mass content of 98% and a phosphoric acid mass concentration of 85%. Other aspects are the same as those of the first to fifth embodiments.

[0037] Specific embodiment 7: This embodiment differs from specific embodiments 1 to 6 in that: in step 3, supporting channel steel and turnbuckle bolts are installed as needed. Other aspects are the same as specific embodiments 1 to 6.

[0038] Specific embodiment 8: This embodiment differs from specific embodiments 1 to 7 in that: step 3 is to clean the ramp opening before masonry to ensure that there is no blockage. The rest is the same as specific embodiments 1 to 7.

[0039] Specific embodiment 9: This embodiment differs from specific embodiments 1 to 8 in that: in step 3, the brick surface after the masonry repair is flat and without misalignment and secondary grouting is performed. Other aspects are the same as specific embodiments 1 to 8.

[0040] Specific embodiment 10: This embodiment differs from specific embodiments 1 to 9 in that the heat insulation cotton is removed before heating in step 4. The rest is the same as specific embodiments 1 to 9.

[0041] The content of the present invention is not limited to the content of the above-mentioned embodiments. The combination of one or more specific embodiments can also achieve the purpose of the invention.

[0042] Example:

[0043] This embodiment provides a method for local cooling of a coke oven carbonization chamber by removing bricks through digging, and the method is specifically performed in the following steps:

[0044] Step 1: Confirm the location of the damaged fire channel for repairing bricks, including the furnace number, fire channel location and number of floors; Figure 1 As shown;

[0045] Step 2: Push all the coke out of the carbonization chamber, open the large cover on the furnace and the large cap of the riser and close the flap, cool down the damaged fire channel, and when the damaged fire channel is cooled to 500-600℃, use insulation cotton to insulate the undamaged fire channel, leaving the working surface. The insulation cotton is made of silicate board, and glass water is used to bond the insulation cotton and the furnace wall; Figure 2 As shown;

[0046] Step 3: Break down the damaged fire channel. After breaking down 2-3 layers and a working surface is formed, dig and patch up the interior of the fire channel to remove bricks. The force of breaking down the wall should be moderate, and try not to use too much force to avoid damaging the intact wall. Then use silica bricks, silica refractory mud and phosphoric acid to repair the working surface. Clean the ramp before laying to ensure that there is no blockage. The brick surface after laying and repairing should be flat and without misalignment, and secondary grouting should be performed. The silica mass content of silica bricks is 98%; the mass concentration of phosphoric acid is 85%; support channel steel and turnbuckle bolts should be used as needed. Figure 3 As shown;

[0047] Step 4. After the repair of step 3 is completed, remove the insulation cotton to increase the temperature; Figure 4 shown.

[0048] In this embodiment, all the coke inside the carbonization chamber is first pushed out, and the damaged furnace wall can be repaired in time by digging and taking bricks, thereby eliminating leakage in a short time and having an immediate effect on environmental protection and smoke control.

[0049] After the excavation and patching operation, this embodiment only requires three days to heat up, compared to the six days required for the traditional method. This significantly improves production efficiency and greatly shortens the construction period. Furthermore, this method does not require the entire carbonization chamber to be cooled, effectively eliminating deformation of the carbonization chamber wall during the heating process and maintaining the flatness of the carbonization chamber wall.

Claims

1. A method for local cooling of the coke oven carbonization chamber by digging and patching bricks, characterized in that The method is specifically carried out in the following steps:

1. Confirm the location for digging and repairing bricks in the damaged fire channel; 2. Push all the coke out of the carbonization chamber, cool the damaged fire channel to 500-600℃, and use thermal insulation cotton to insulate the undamaged fire channel wall; 3. Break down the wall of the damaged fire channel. After breaking down 2-3 layers to create a working surface, dig and repair the interior of the fire channel by taking bricks, and then build the repair work surface; 4. After step 3 is repaired, heat up.

2. A method for local cooling of a coke oven carbonization chamber by digging and patching bricks according to claim 1, characterized in that The brick taking points described in step 1 include the furnace number, fire channel position and layer number range.

3. The method for local cooling of a coke oven carbonization chamber by digging and patching bricks according to claim 1 is characterized in that Step 2: Open the large cover on the furnace and the large cap of the riser and close the flap to cool down the damaged fire channel.

4. A method for local cooling of a coke oven carbonization chamber by digging and patching bricks according to claim 1, characterized in that Step 2: When the damaged fire channel is cooled to 500-600°C, the undamaged fire channel is insulated to leave a working surface.

5. The method for local cooling of a coke oven carbonization chamber by digging and patching bricks according to claim 1 is characterized in that Step 2: The thermal insulation cotton adopts silicate board and is bonded with glass water.

6. A method for local cooling of a coke oven carbonization chamber by patching and removing bricks according to claim 1, characterized in that Step 3: Masonry repair using silica bricks, silica refractory mud and phosphoric acid; The mass content of silicon dioxide in the silica brick is 98%; the mass concentration of phosphoric acid is 85%.

7. The method for local cooling of a coke oven carbonization chamber by digging and patching bricks according to claim 1 is characterized in that Step 3: Install support channel steel and use turnbuckle bolts as needed.

8. The method for local cooling of a coke oven carbonization chamber by removing bricks during repairing according to claim 1, characterized in that Step 3: Clean the ramp opening before laying to ensure there is no blockage.

9. A method for local cooling of a coke oven carbonization chamber by digging and patching bricks according to claim 1, characterized in that Step three: After the repair, the brick surface is smooth and without misalignment and the joints are grouted a second time.

10. A method for local cooling of a coke oven carbonization chamber by digging and patching bricks according to claim 1, characterized in that Step 4: Remove the insulation cotton before heating.

Images