The power wave overflow weir is clogged – how to clean it?

It happens very rarely, Duse. The main reason is that the dust collection system used before purification doesn’t work effectively, resulting in a large amount of dust being carried in. Check the dust collection system. An appropriate amount of flocculant can be added to the purified dilute acid settler to reduce the dust content in the circulating acid. It is a solution. Clean the circulation tank of the silt deposited at the bottom of the tank.

We haven’t encountered any issues with it, but we’ll check it thoroughly during the next maintenance session.

What was said on the first floor is very accurate. Our overflow weirs also experience blockages. The main reasons are as follows: 1) There is a high amount of dust in the system, which leads to a large amount of acidic dust generated by the pressure waves; 2) The pressure is insufficient, resulting in a low flow rate of liquid over the overflow weir and thus dust accumulation; 3) No waste discharge treatment is carried out. This leads to severe accumulation and blockage, and can easily damage the overflow weir. Enhance dynamic wave displacement and waste discharge, and check the dust removal efficiency of the pre-system electric field, cyclone, boiler, etc.

It’s a hassle when the dilute acid channel of the overflow weir gets blocked; it’s still okay if no hard scale has formed yet – just rinse it with water； If the scale is very hard, either replace the pipe or remove it section by section, using a hard object to tap on its outer wall gradually, while flushing it with water from inside. In the past, during maintenance at our factory, we encountered situations where the circulating acid was quite dirty; as a result, the pipes carrying the dilute acid to the overflow weir became severely scaled, which easily led to interruptions in the flow at the overflow weir. It is necessary to keep an eye on the temperature changes in the transition tube near the overflow weir at all times. The key issue is that the circulating acid is too dirty; either the dust collection system needs to be adjusted properly, or the flow rate of the contaminated acid needs to be increased.

The dust collection system ahead must be effective; otherwise, too much mineral dust will reach here

Is there no manhole in the flue above the overflow weir? People need to enter to carry out the cleaning; we do this kind of cleaning during our annual maintenance, and it’s quite inconvenient. Be sure to pay attention to safety measures!

There are four access holes around our Yiliu weir, which can be removed for cleaning

Main reason 1； Entering the purification section for excessive dust in sulfuric acid flue gas results in poor efficiency, 2 ； The circulating acid sludge is too large, 3 ； The dynamic wave spraying effect is poor.

Overflow weir dilute acid channel? Do you mean that acid channel? We have a sump here; the dilute acid flows in through the sump emergency valve and the sump overflow pipe, thereby flowing into the annular tube of the overflow weir to prevent it from being damaged. I’m not sure which channel you mean by the overflow weir dilute acid channel There’s also the reverse nozzle, but reverse nozzles tend to get clogged