Tube furnace coking problem
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How to deal with coking in the crude benzene tube furnace oil pipe? It doesn't make sense at all now.
If there is no connection at all, disconnect certain points on the pipe, purge it with steam to see if it is blocked, and replace the pipe part if it is blocked. I don’t have any experience, I think it’s caused by leaving the cleaning oil in the stove for too long?
You should pay attention when operating. Coking is very troublesome. If it doesn't work, just change the tube. You can take out the tube and blow it with steam, or you can burn it, but it is very dangerous.
If it doesn't work at all, there is no other option but to replace the tube.
Check the coking situation. If only a part of it is coked, you can cut it and clean it.； If there are many coked pipes, the only option is to replace them. There are many cases of coking in the oil pipes in the tube furnace. Pay attention to the operation during production. The best way is to add an oil-rich pressure interlock device on the gas pipeline entering the tube furnace. This can effectively solve the problem of coking in the tube furnace.
What does the oil-rich pressure interlock device upstairs mean? Thanks! ! ! !
We install a flow regulating control valve (pneumatic) on the oil-rich inlet tube furnace pipeline. If the oil-rich flow rate is too small, the fire-extinguishing steam will be turned on and the gas supply will be cut off.
There is no good cleaning agent in China, right? Therefore, we must fully consider the situation of coking or biased flow when designing. We have encountered coking in thermal oil furnaces. The inside of the tube is basically blocked, and the inner coil can only be replaced. If your coil is also unblocked, it may have to be overhauled.
(1) Open the manhole of the tube furnace, let two people enter and use an ultrasonic thickness gauge to measure the thickness of the tube wall.； (2) Starting from the thinnest part, disconnect the coil and use a pipe dredging machine to dredge it. After the dredging is completed, use 0.5 MPa compressed air to dredge it. ； If the substance in the pipe is viscous, add a 6-cent iron pipe during the process of clearing the pipe, and then pass steam into the iron pipe to melt it and flow out on its own. ； (3) There is no need to change the pipe when the production time is short. Be sure to use compressed air, never nitrogen:) :victory: :victory: :victory:
In addition, the oil-rich chain also has its limitations.
What should I do if the pump is too old and prone to power outages and the gas supply is unstable?