Turbidity of coal water slurry gray water system?

It is enough to control the turbidity of gray water below 100mg/m³. It will basically not have any impact on the operating equipment. Our company generally keeps it between 50-60mg/m³. The main method is: 1. Add gray water flocculant appropriately, but do not add too much. If too much is added, the turbidity will be below 30mg/m³, which will easily cause scaling of the gray water system. 2. The second method is to strengthen the filtration of black water fine residue. Our company's original design used a plate and frame filter press for fine residue filtration, but the filtering effect was poor. The fine ash generated during production could not be removed in time. It is very common for gray water turbidity to be more than 1,000 mg/m³. As a result, the high-pressure gray water pump had to be replaced after running for 40 days at most. In July 2005, the belt vacuum filter was replaced. The filtration effect was significantly improved, and the gray water turbidity dropped to 50 mg/m³. The high-pressure gray water pump has been running for 200 days without any failures.

I would like to ask, if the turbidity is below 30, why does the system scale? ?

I think what the third floor means is that the turbidity is low, and perhaps too much flocculant was added, which overflowed into the gray water tank and entered the system, causing solid particles to scale in the system pipes. I don’t know if this is the right understanding?

Choose a flocculant suitable for the type of coal, but the amount added should be adjusted to an appropriate ratio (through experimental analysis). It is not that the more you add, the better.

What a lesson* That's a trick, thanks