Replacement plan for the flap seat of the coke oven rising pipe
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Our factory will replace the flap seat. Below is the replacement plan I have prepared; please take a look and point out any shortcomings you may find. I appreciate any feedback you can provide! **#Replacement plan for the flap seat mechanism: On **/**/** in ****, five months after the commissioning of Coke Oven No. 2, it was found that after coke was extracted from Charring Chamber No. **, the water seal flap seat of the rising pipe was unable to seal off the waste gas in the gas collection pipe; as a result, this waste gas flowed back into the charring chamber. Moreover, before coke extraction, the water seal in Charring Chamber No. ** could not prevent the waste gas from entering the rising pipe, which made it difficult to clean the rising pipe. To ensure normal production, it has been decided to replace the **#water seal flap seat during the year-end maintenance period. The specific plan is as follows: 1. Process steps: (1) After the coke in the furnace has fully matured and the fans are shut down, if the pressure in the gas collection pipe cannot be maintained at 80 Pa, all flaps shall be closed and secured with wire. (2) After opening the vent pipe to release waste gas for a period of time, and after confirming that the gas levels meet the standards using a gas detector, or after a blasting test proves successful, steam is then used to purge the gas collection pipe. (3) After the waste gas in the gas collection pipe has been thoroughly purged, the flap seat is replaced immediately. (4) The furnace top worker opens the furnace top cover and rising pipe cover on the coke side of **#carbonization chamber, closes the flap at the same time, and secures the handle with wire. (5) The riser cleaner cleans the riser, after which the hot work personnel remove the socket at the bridge pipe, as well as the asbestos rope and insulation material at the base of the riser. (6) Stop the circulating ammonia water pump, close the circulating ammonia water valve; the riser operator shall close the **#riser ammonia water spraying valve, and disconnect the connection pipes of the ammonia water nozzles on the bridge pipe as well as the water seal drain pipe. (Needs to be removed from its stand if necessary.) (7) Use a crane to lift the rising pipe together with the bridge pipe. Adjust the collector pressure to 0–5 Pa and maintain it stable. (8) Seal the rise tube opening with asbestos board to reduce heat loss. (9) Next, the flip plate seat is replaced. After the old flap seat has been lifted away, cover the connection flange with a cover plate. The flange should be coated with machine oil to prevent sparks from being generated. (10) After the flap seat has been replaced, lift the rising pipe together with the bridge pipe and install them in place. (11) Thermal repair seals the socket of the bridge pipe and the base of the rising pipe. (12) After the entire rising pipe valve body has been installed, connect the pipeline for the ammonia water nozzle as well as the water seal drain pipe. Once it is confirmed that the ammonia water circulation is functioning properly, open the ammonia water spraying valve simultaneously, and observe the spraying situation through the cleaning hole in the bridge pipe. Once the spraying is working correctly, remove the air duct to prepare for coke removal. (13) The fire adjuster should maintain the furnace temperature throughout the soaking period to prevent incidents caused by excessive high or low temperatures. 2. Safety measures: (1) Assign a dedicated person to direct the crane in the relocation of equipment ； (2) Fire extinguishers, wet burlap bags, etc. are ready ； (3) Operators must wear appropriate personal protective equipment ；
Your plan has quite a few issues; I’d like to remind you of that. I’ll take some time at night to discuss it with you further. The cost of my solution is only 1% of yours; it’s highly mature.
Hehe, okay! Is the maintenance cost only 1%? ! Looking forward to it~~~
To be more specific, haha, if I could optimize it, I would have already done so :lol
1. Whose design is used for your furnace model – that of the Jiaonai Institute or the Huaer No. 2 Institute? It mainly concerns the parts and methods of connection between the gas collection pipe, the valves, and the rising pipe. 2. Furnace type, 4.3 meters? 5.5 meters? Still 6 meters? 3. What date? In the middle or on either side of the entire coke oven. 4. Is it really necessary to stop production? Anyway, my plan doesn’t need it.
The furnace numbers of the 4.3m ramming coke ovens at the Second Chemical Plant, whose flap seats need to be replaced, are located on both sides of the coke ovens. Since it is also necessary to carry out maintenance on the circulating ammonia water pipes, production must be halted!
The plan for the second floor isn’t visible,?? Can it be shared?
It’s obvious at a glance that it’s the 7.63m one from the Jiaonai Institute
Which one is it, the 7.63m Cokerelectric Plant, or the 4.3m ramming coke oven at the Second Chemical Plant?
It’s the 4.3m ramming coke oven from the Second Chemical Plant!!
Aspects that need to be addressed: 1. After shutting off the low-pressure ammonia solution, industrial water is used instead for cooling; what should be done with the returned water? Point 2 must be taken into consideration: generally, there is no need to halt production when replacing the flap seat ； 3. Is it a coke oven with a single gas collection pipe or a double gas collection pipe? Generally, 4.3-meter ramming coke ovens are single-collector coke ovens.
In a coke oven with a single gas collection pipe, there is no need to shut down the operation for replacement; during the replacement process, it is advisable to set up a temporary small chimney on the coke side, which facilitates the replacement.