A few small questions about MTO
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This post was last edited by jordan569 on 2013-1-6 21:45 1. Reactor accident fluidization steam: Under what circumstances is it used? 2. Is the auxiliary combustion chamber of the main reactor only used when starting to heat up? The working fluid that goes to the reactor after being heated is nitrogen, right? What about the auxiliary combustion chamber of the regenerator? Is it air or nitrogen that is being heated? Is the regenerator auxiliary combustion chamber deactivated after the regenerator is stable and only continues to provide air for oxidation of coked carbon on the regenerated catalyst? 3. About the three catalyst tanks: The fresh catalyst tank and the spent catalyst tank are easy to understand, but how do you understand the hot catalyst tank? Does the canned steam ejector maintain a vacuum to prevent oxygen from entering and deactivating the catalyst? So what is the function of each canned cyclone separator? 4. Reactor dense phase heat coil: How to understand secret phase? Is it related to the term dense phase circulating fluidization reaction? Is this the raw methanol heating coil? 5. Start heating furnace: Does the heating furnace only heat the raw material methanol? Heated to what temperature? When is nitrogen used? What raw material methanol is heated together and sent to the reactor? 6. And why is the water washing tower designed on top of the quench tower and connected together? Each tower is not high. The height of the quenching tower plus the skirt should be less than 30m. Just the skirt at the bottom of the tower is 13.5m, and the water washing tower is only more than 30 meters. 7. What is the critical flow rate nozzle at the outlet of the four-stage cyclone separator of the regenerator? What does it do? 8. I secretly asked this question from my friends in Shenhua Coal-to-Olefins.: How is your 40-piece air cooler running? Which company produced it? Just out of curiosity, Lanzhou Petrochemical's large ethylene air cooler was out of service due to serious leakage. The rusty one was terrible!!!! .Note # ) # # , .
Brother, this is going to be a tragedy again. Every time I post something, it always goes down, but I don’t get a single reply? Does this involve confidentiality?
There are too many to describe in just a few words.
Reply 3# Screaming Whale has 7 or 8 questions. You can choose one to answer. Each person can answer one and the problem will be solved quickly.
To be honest, you don’t think these questions involve confidentiality, but many of them are problems in actual operations. Even if they are simple, coal-to-olefins is very sensitive now, and many practitioners are strict with their mouths. It will be troublesome to talk about actual operational issues in public.
I have never seen MTO, but most of the answers to these questions can be found in the FCC. It seems that they are a group of MTOs that design catalytic cracking.
Reply 6# kooee I think the answer is correct! Most MTO operations now come from the FCC! In fact, it is easier to find the answers to these from the FCC!
I recently read my own MTO process flow and all the issues were understood in detail. As for the operation of Shenhua's air cooler, I will go to Baotou to check it in detail soon.