Problem with pellet block detachment in the granulation tower?
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A few days ago, large lumps fell from the granulation tower, blocking the feed inlet and causing belt No. 0 to stop operating. What methods can be used to prevent such large amounts of lumps from falling from the tower walls? Are there any better technical solutions available? . .
We carry out scar treatment regularly; our factory does this every two weeks, and the results are quite good
It is mainly to prevent urine from sticking to the tower. The specific measures are as follows: 1. It is strictly prohibited to allow the nozzle to rotate at too high a speed, as this can cause the molten urine to be splashed against the tower walls. 2. Regularly clean and replace the nozzles to prevent them from becoming clogged; this avoids pressure buildup in the nozzles, which could cause melted urine to be splashed against the tower walls. 3. Strict procedures require that the evaporation and recirculation dumping process must be carried out cleanly before steam can be used for blowing out ； Evaporation causes a temperature drop, so circulation must be resumed. 4. It is best to avoid granulation under pressure.
We followed the steps mentioned above, and we also took that into account; it’s inevitable that some sticking to the tower wall will occur. Using large amounts of chemicals can indeed solve this problem, but it’s not cost-effective, and carrying out cycles will lead to an increase in the content of biuret. I’m trying to take climate factors into account to find a way in which the clumps can fall without blocking the feed inlet
By switching to new nozzles, our factory used to clean the tower once a month; after the renovation, it now needs to be cleaned once every six months
Our factory regularly cleans the bottom of the granulation tower’s large vessel; every Thursday during the day shift, evaporation is stopped and the circulation is halted. The bottom of the vessel is then washed with steam condensate, the nozzles are replaced, and the filters are inspected. By doing this on a regular basis, it becomes less likely for clumps to form.
The only approach is to minimize caking; otherwise, regular cleaning is the only option.
Reply to 6# scmydeng: This person is really too hardworking! I’ve at least not seen this done before; not only does it affect quality, but it also greatly disrupts normal production. .
I’m not sure whether the original poster is asking about the issue of the granulation tower’s bottom sticking, or about urine sticking to the walls of the granulation tower
Problems with the tower wall in the urine viscous granulation tower?
We produce sodium nitrate, and we are also facing the problem of caking at the bottom of the reactor; it’s not clear whether this is due to excessive temperature or high moisture content. We hope you can help us solve this issue. Thank you!