Seeking help: There is a bit of cold ash in the boiling furnace
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This post was last edited by txglyl on 2019-1-28 at 20:04. In the sulfur iron ore acid production system, there is a problem of cold ash in the boiling furnace; seeking a solution using the danda method
The occurrence of cold ash in a fluidized bed furnace is caused by an inappropriate combination of wind speed and particle size. Neither the air volume nor the air nozzles can be changed; therefore, the cause must be sought in the raw materials. If the thickness of the fixed layer is too small, it can be increased appropriately
The mismatch between wind speed and particle size leads to the deposition of coarse particles; increasing the pressure at the furnace bottom and boosting the bottom airflow can help address this issue.
First, rule out issues in the raw material processing stage such as damaged screens or excessive moisture. If a small amount of cold ash is produced, slag can be discharged intermittently and the pressure at the bottom of the furnace can be increased slightly. If a large amount of cold ash is generated continuously, it is necessary to operate the boiling furnace with reduced air flow and at a lower load.
I believe we shouldn’t increase the bottom wind any further