Plan for replacing the coke oven door frame

Are you planning to fix it yourself or...?

Which unit do you belong to? Please specify the age of the furnace, the condition of the furnace door, and what happened when the damage to the furnace door was first noticed!

I am from Fulong Coking Plant in Liulin, Lüliang. The furnace is 10 years old; all four lifting lugs on its door are cracked. It is a 4.3-meter-high top-mounted coking furnace.

This post was last edited by lfzhbl on 2016-4-14 at 11:52. I am from Linfen Xusheng Technology; we specialize in the maintenance of coke ovens and have some knowledge regarding them. In addition to being an important furnace protection device for coke ovens, the furnace door frame is also a key factor in achieving environmental standards. Therefore, replacing the work is a task that requires great precision, and it also demands a high level of professionalism from those involved. In the past, some companies attempted to carry out this replacement themselves, and various problems arose during that process. Moreover, many problems arose that caused difficulties in the subsequent coke oven operations, leading to unnecessary increases in the costs associated with maintaining those coke ovens for the company. Since I wasn’t at the site, it’s not possible to conduct a detailed analysis of certain aspects. For now, based on what you’ve described, I can offer a relatively simple replacement solution for reference: Preliminary preparation steps: 1. Create a simple furnace door by removing the frame, lining bricks, and other fixtures of the furnace door that needs to be replaced, keeping only the door itself as the simple furnace door. 2. Lay asbestos rope in the areas where the new furnace door frame meets the protective panels, and secure it in place. 3. Leave a gap between the furnace door frame and the steel columns on both sides. Details: (1) Adjust the verticality and elevation angle of the quench car trolley. (2) Pre-loosen the hook bolts of the furnace door frame to be replaced in advance, then tighten them after applying oil. (3) After determining the replacement time, control the temperature of the corresponding vertical flue. Prepare asbestos felt as an insulating material. (4) Determine the position of the positioning pins on the protective plate based on the dimensions of the furnace door frame, and mark them. (5) Create a fixing plate for the simple furnace door. Replacement steps: 1. Determine the replacement time based on the coking schedule. 2. Remove the furnace door and place it on the furnace door maintenance rack; then, use the simple furnace door that was prepared in advance to align it with the carbonization chamber and secure it in place. 3. After securing it, remove the remaining hook-type bolts. 4. Reverse the focusing trolley, and use the simple furnace door to remove the furnace frame together. 5. The focus-blocking vehicle carries the old furnace door frame to the coke oven end platform. Use a crane to remove the old furnace door frame. 6. After removing the old furnace door frame, the maintenance personnel scrape off some of the burnt carbon from the furnace tip, cover the red-hot carbon with asbestos felt to provide insulation, and wait for the new furnace door frame to be installed. 7. Install the new furnace door frame. 8. After the new furnace door frame is installed and positioned, secure the new furnace door frame to the simple furnace door. During installation, fix it by referring to the markings on the steel columns and furnace frame. 9. Replace the simple furnace door with the newly repaired one. 10. The hot repair worker has completed building the furnace nozzle and the replacement work. It is important to note that before carrying out the replacement work, all personnel involved must be gathered to explain the replacement plan, ensuring that every employee is familiar with it. For all lifting operations prior to the replacement, electric and welding workers must carry out thorough preparatory work in advance to shorten the replacement time. Since the carbonization chamber remains open during the replacement of the furnace door frame, staying in this state for too long can damage the graphite in the wall joints, resulting in smoke emission from the chimney and environmental pollution. Designate personnel from the replacement team to act as a coordinator for the replacement work, in order to prevent accidents. Additionally, be sure to conduct a comprehensive inspection and analysis of the faulty furnace door frame as well as the interior of the furnace before formulating a specific solution, in order to prevent any accidents during the replacement process and any other issues after it is completed.

Could I come visit you? Just to get to know a friend, if that’s okay! :）

Please help me – I’m having trouble getting the pusher car doors to move; they get stuck in track S. The bearings of the guide wheels keep breaking, and I don’t know why.