Coke oven door frame channeling and leaking grouting sealing method

Abstract

The application discloses a method for sealing coke oven door frame channeling by grouting, which comprises the following steps: firstly, observing the channeling of the coke oven door frame to be repaired, judging the gap state between the coke oven door frame and the protection plate, and determining the channeling position; secondly, removing the T-shaped bolts of the fixed pressing plates adjacent to the upper part and the lower part of the channeling position, and completely covering the channeling position between the upper and lower pressing plates; thirdly, cleaning the installation hole after the T-shaped bolts are removed; fourthly, installing the grouting sealing plate with a grouting pipe and a drainage pipe in the T-shaped bolt installation hole of the upper part and the lower part of the channeling position; fifthly, using a grouting machine to press the sealing grouting material into the gap between the coke oven door frame to be repaired and the protection plate through the grouting pipe in batches until the grouting pipe discharges the grouting material; and finally, completing the sealing grouting of the coke oven door frame channeling. The method overcomes the defects of the traditional coke oven door frame channeling maintenance, reduces the influence on the normal production of the coke oven, avoids damaging the carbonization chamber masonry, improves the maintenance effect and efficiency, reduces environmental pollution, ensures the normal and reliable operation of the coke oven, and prolongs the operation cycle.

Description

Technical Field

[0001] This invention relates to the field of coke oven maintenance technology, and in particular to a grouting sealing method for coke oven door frame leakage. Background Technology

[0002] Coke ovens are large-scale equipment used in coke production, with a typical service life of 20-30 years. Due to the long-term exposure of the oven door frame and protective plate to high temperatures and the effects of opening and closing the oven door, the door frame gradually bends and deforms, and the sealing fiber ropes are eroded. This leads to a widening gap between the protective plate and the door frame, resulting in frequent smoke and fire at the joints during production, increasing environmental pressure and sometimes forcing a shutdown. Traditional maintenance methods involve replacing the entire deformed or severely broken door frame, or removing and replacing the sealing fiber ropes between the outer frame and the protective plate, and then sealing the shoulder seams with fiber ropes or ceramic welding after emptying the oven. Complete replacement not only disrupts normal coke oven production but also causes severe damage to the silica brick walls of the carbonization chamber corresponding to the door frame being repaired due to temperature fluctuations. Furthermore, repairs are time-consuming and inefficient. Replacing the outer frame fiber ropes, manually pressing the seams after emptying the oven, or ceramic welding only addresses surface gaps, resulting in inconsistent repair effectiveness. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a grouting sealing method for leakage in coke oven door frames. This method overcomes the defects of traditional door frame leakage repair, reduces the impact on normal coke oven production, avoids damage to the carbonization chamber masonry, improves repair effect and efficiency, reduces environmental pollution, ensures normal and reliable operation of coke ovens and extends operating cycle.

[0004] To solve the above-mentioned technical problems, the grouting sealing method for coke oven door frame leakage of the present invention includes the following steps:

[0005] Step 1: In the initial stage of coal charging in the coking chamber corresponding to the coke oven door frame, appropriately increase the single-hole pressure or gas collecting pipe pressure, observe the leakage situation of the coke oven door frame to be repaired, determine the gap between the door frame and the protective plate, and identify the leakage location.

[0006] Step 2: Remove the T-bolts of the adjacent fixing plates at the top and bottom of the leaking area, ensuring that the leaking area is completely covered between the upper and lower pressure plates.

[0007] Step 3: Use compressed air to blow clean the mounting holes after removing the T-bolts;

[0008] Step 4: Install a grouting sealing plate with a grouting pipe in the T-bolt mounting holes at the upper part of the leakage point, and install a grouting sealing plate with a drainage pipe in the T-bolt mounting holes at the lower part of the leakage point.

[0009] Step 5: Using a hydraulic grouting machine under certain pressure, the sealing grouting material is pressed into the gap between the coke oven door frame and the protective plate in stages through the grouting pipe until the grout comes out of the drain pipe.

[0010] Step 6: Remove the grouting pipe and the drainage pipe, and reinstall the removed T-bolts to complete the grouting seal for leakage in the coke oven door frame.

[0011] Furthermore, during the grouting and sealing operation between the coke oven door frame and the protective plate, all coke oven numbers operated normally.

[0012] Furthermore, the coke oven door frame and the grouting sealing plate are connected using the original T-bolts, and can be reused.

[0013] Furthermore, the net pressure of the hydraulic grouting machine is set to be less than 1 kg / cm². 2 The net pressure of the hydraulic grouting machine is the actual outlet pressure minus the resistance pressure.

[0014] Furthermore, the flow value of the sealing grout is greater than 180 mm and the particle size is not greater than 1 mm.

[0015] Furthermore, when the sealing grout is pressed in, it is pressed in two or more times, with each pressing time not exceeding 30 seconds. There should be a pause of more than 5 minutes between adjacent pressing operations. If there is any leakage or blockage, the hydraulic grouting machine should be shut down in time.

[0016] Furthermore, the grouting pipe is positioned above the leakage point of the furnace door frame, and the grouting sealing plate is installed using the original T-bolt mounting holes of the furnace door frame. The drainage pipe is positioned below the leakage point of the furnace door frame, and is located 2 to 3 T-bolt mounting holes away from the grouting pipe.

[0017] The grouting sealing method for coke oven door frame leakage in this invention adopts the above-mentioned technical solution. This method first observes the leakage situation of the coke oven door frame to be repaired, determines the gap between the door frame and the protective plate, and identifies the leakage location. It then removes the T-bolts securing the upper and lower adjacent fixing plates at the leakage location, ensuring the upper and lower plates completely cover the leakage area. The mounting holes after removing the T-bolts are cleaned. Grouting sealing plates with grouting pipes and drainage pipes are installed in the T-bolt mounting holes at the upper and lower parts of the leakage location. A grouting machine is used to press sealing grout into the gap between the coke oven door frame and the protective plate in stages through the grouting pipe until grout exits from the drainage pipe. This completes the grouting sealing of the coke oven door frame leakage. This method overcomes the shortcomings of traditional door frame leakage repair methods, reduces the impact on normal coke oven production, avoids damage to the carbonization chamber masonry, improves repair effectiveness and efficiency, reduces environmental pollution, ensures the normal and reliable operation of the coke oven, and extends its operating cycle. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a flowchart of the grouting sealing method for coke oven door frame leakage according to the present invention;

[0020] Figure 2 This is a schematic diagram of the arrangement of grouting pipes and drainage pipes in this method. Detailed Implementation

[0021] Implementation, for example Figure 1 and Figure 2 As shown, the grouting sealing method for coke oven door frame leakage of the present invention includes the following steps:

[0022] Step 1: In the initial stage of coal loading in the coking chamber corresponding to the coke oven door frame 1, appropriately increase the single hole pressure or gas collecting pipe pressure, observe the leakage of the coke oven door frame 1 to be repaired, determine the gap between the door frame 1 and the protective plate, and identify the leakage point 11.

[0023] Step 2: Remove the T-bolts of the adjacent fixing plates at the upper and lower parts of the leakage point 11, and ensure that the upper and lower pressure plates completely cover the leakage point 11.

[0024] Step 3: Use compressed air to blow clean the mounting holes after removing the T-bolts;

[0025] Step 4: Install the grouting sealing plate with grouting pipe 2 in the T-bolt mounting hole at the upper part of the leakage part 11, and install the grouting sealing plate with drainage pipe 3 in the T-bolt mounting hole at the lower part of the leakage part 11.

[0026] Step 5: Using a hydraulic grouting machine under a certain pressure, the sealing grouting material is pressed into the gap between the coke oven door frame and the protective plate in several stages through the grouting pipe 2 until the grout comes out of the diversion pipe 3.

[0027] Step 6: Remove grouting pipe 2 and drainage pipe 3, reinstall the removed T-bolts, and complete the grouting seal for leakage in coke oven door frame 1.

[0028] Preferably, during the grouting and sealing operation between the coke oven door frame and the protective plate, all coke ovens operate normally.

[0029] Preferably, the coke oven door frame and the grouting sealing plate are connected using the original T-bolts, and can be reused.

[0030] Preferably, the net pressure of the hydraulic grouting machine is set to less than 1 kg / cm². 2 The net pressure of the hydraulic grouting machine is the actual outlet pressure minus the resistance pressure.

[0031] Preferably, the flow value of the sealing grout is greater than 180 mm and the particle size is not greater than 1 mm.

[0032] Preferably, when the sealing grout is pressed in, it is pressed in two or more times, with each pressing time not exceeding 30 seconds. There should be a pause of more than 5 minutes between adjacent pressing operations. If there is leakage or blockage, the hydraulic grouting machine should be shut down in time.

[0033] Preferably, the grouting pipe 2 is located above the leakage part 11 of the furnace door frame, and the grouting sealing plate is installed using the original T-bolt mounting holes of the furnace door frame. The drain pipe 3 is located below the leakage part 11 of the furnace door frame and is located at a distance of 2 to 3 T-bolt mounting holes from the grouting pipe 2.

[0034] This method was implemented in a 7.63-meter coke oven, which uses a single carbonization chamber pressure regulation system.

[0035] Step 1: Based on the smoke emission numbers recorded by the production team and the daily plan, carbonization chamber No. 06 was selected for the experiment. One hour after the coal was loaded (push No. 18, 12 numbers apart), the pressure of the carbonization chamber was set to 180pa. It was observed that the lower part of the large number of coke oven door frame was leaking and emitting serious smoke. At the same time, the location of the leak was determined.

[0036] Step 2: Remove the upper and lower T-bolt fixing plates at the nearest point of leakage, and ensure that the area between the upper and lower plates completely covers the leakage area.

[0037] Step 3: Use compressed air to blow clean the mounting holes of the upper and lower T-bolts;

[0038] Step 4: Install the grouting sealing plate with grouting pipe and drainage pipe on the upper and lower T-bolt mounting holes;

[0039] Step 5: Using a hydraulic grouting machine through the grouting pipe, apply grout at a pressure of 1 kg / cm². 2 Under pressure, the sealing grout is pressed into the gap between the furnace door frame and the protective plate in three stages. Each pressing time is controlled to be 25 seconds, and there is a 6-minute pause between each operation until the grout comes out of the drain pipe.

[0040] Step 6: Remove the grouting pipe and the drainage pipe, and reinstall the removed T-bolts to complete the grouting seal for leakage in the coke oven door frame.

[0041] One hour after grouting was completed, the pressure in carbonization chamber No. 06 was set to 180 Pa. It was observed that there was no smoke coming out of the coke oven door frame. At the same time, three rounds of continuous monitoring showed that the smoke problem of the door frame was significantly improved, and the effect was remarkable.

[0042] This method first involves inspecting and accurately locating the leakage point in the furnace door frame under normal production conditions. Using a grouting machine and other specialized tools, at least six carbonization chambers away from the coke pusher (maintaining sufficient safety distance), the upper and lower T-bolt pressure plates near the leakage point are removed, and the T-bolt mounting holes are cleaned. Then, a grouting pipe and guide pipe are installed to form a grouting sealing channel. Using a hydraulic grouting machine, appropriate net pressure and sealing grout are selected, and the gap between the furnace door frame and the protective plate is grouted and sealed through the grouting pipe. The grouting operation needs to be performed in stages. The grouting operation ends when grout exits from the guide pipe. This method overcomes the shortcomings of traditional repair methods such as replacing the asbestos rope or even the entire furnace door frame, and semi-dry spraying or ceramic welding repair of the furnace shoulder seam after emptying the furnace, which involve large workloads, high safety risks, and disruption to production (due to incorrect labeling). It also significantly reduces damage to the furnace body refractory materials, effectively controls furnace door frame leakage, and reduces the environmental risks of fugitive emissions from the coke oven.

Claims

1. A grouting sealing method for leakage in a coke oven door frame, characterized in that... This method includes the following steps: Step 1: In the initial stage of coal charging in the coking chamber corresponding to the coke oven door frame, appropriately increase the single-hole pressure or gas collecting pipe pressure, observe the leakage situation of the coke oven door frame to be repaired, determine the gap between the door frame and the protective plate, and identify the leakage location. Step 2: Remove the T-bolts of the adjacent fixing plates at the top and bottom of the leaking area, ensuring that the leaking area is completely covered between the upper and lower pressure plates. Step 3: Use compressed air to blow clean the mounting holes after removing the T-bolts; Step 4: Install a grouting sealing plate with a grouting pipe in the T-bolt mounting holes at the upper part of the leakage point, and install a grouting sealing plate with a drainage pipe in the T-bolt mounting holes at the lower part of the leakage point. Step 5: Using a hydraulic grouting machine under certain pressure, the sealing grouting material is pressed into the gap between the coke oven door frame and the protective plate in stages through the grouting pipe until the grout comes out of the drain pipe. Step 6: Remove the grouting pipe and the drainage pipe, and reinstall the removed T-bolts to complete the grouting seal for leakage in the coke oven door frame.

2. The grouting sealing method for coke oven door frame leakage according to claim 1, characterized in that: During the grouting and sealing operation between the coke oven door frame and the protective plate, all coke ovens were operating normally.

3. The grouting sealing method for coke oven door frame leakage according to claim 1 or 2, characterized in that: The coke oven door frame and the grouting sealing plate are connected using the original T-bolts and can be reused.

4. The grouting sealing method for coke oven door frame leakage according to claim 3, characterized in that: The net pressure of the hydraulic grouting machine is set to less than 1 kg / cm². 2 The net pressure of the hydraulic grouting machine is the actual outlet pressure minus the resistance pressure.

5. The grouting sealing method for leakage in the coke oven door frame according to claim 4, characterized in that: The flow value of the sealing grout is greater than 180 mm and the particle size is not greater than 1 mm.

6. The grouting sealing method for leakage in the coke oven door frame according to claim 4, characterized in that: When the sealing grout is pressed in, it shall be pressed in two or more times, with each pressing time not exceeding 30 seconds. There shall be a pause of more than 5 minutes between adjacent pressing operations. If there is leakage or blockage, the hydraulic grouting machine shall be shut down in time.

7. The grouting sealing method for leakage in the coke oven door frame according to claim 1, characterized in that: The grouting pipe is located above the leakage point of the furnace door frame, and the grouting sealing plate is installed using the original T-bolt mounting holes of the furnace door frame. The drainage pipe is located below the leakage point of the furnace door frame, and is 2 to 3 T-bolt mounting holes away from the grouting pipe.

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