Slag blockage at the outlet of the space furnace synthesizer
Thread Content
The outlet of the syngas produced by the space furnace is always clogged with slag, and there is severe ash accumulation at the outlet of the synthesizer after it is started up. Please advise, experts!
Is it the rough gas outlet pipeline of the quench chamber in the gasifier? See what type of blockage it is: scale, crystalline salts, ash, or something else
Furnace size, coal quality, ash content and ash fusion point, gasification temperature during startup, system pressure, quench chamber liquid level: lol
Looking forward to the original poster’s follow-up to see how the issue is analyzed and what the actual situation is!
How long has it been running, and how much is left blocked at the outlet? Also, have you modified the internal components of your furnace?
First of all, thank you to this colleague. We haven’t made any modifications internally; the unit has been in operation for less than 60 days. During recent operations, the syngas outlet starts to get clogged after a short period of time. The pressure difference calculated between the pressure point in the quench chamber and that at the syngas outlet is increasing gradually. Every time the unit is started up, ash builds up at the syngas outlet; in the worst cases, there is only a hole about the size of an arm there
Issues such as fluctuating liquid levels and blockages caused by ash in the process gas require equipment modifications. Please send me your process flow diagram and dimensions so I can check whether it’s similar to ours. After making the modifications, blockages basically no longer occur. Email: 471941009@qq.com
What kind of coal are you burning? Also, what are the controls for the level and discharge volume of the gasifier?
Your setup requires high-temperature dust removal equipment
1. If the internal components have not been modified, then an analysis from an operational perspective should be carried out first; if there is ash present, it comes from the gasification furnace. So, has there been a significant change in the ash content of the raw coal? How much quenching water is used? What is the liquid level control status of the gasifier? 2. It could also be caused by poor water quality. 3. Does this furnace exhibit the same phenomenon during operation in other cycles? If so, it is necessary to consider whether an improper outlet piping configuration is causing a reduction in flow velocity