Reasons and solutions for sludge leakage in sludge filter press

 

Sometimes, we will find that there is sludge leaking out of the ring of the sludge filter press, which greatly affects the working efficiency of the equipment.

So, what are the possible reasons for the muddy filter press to run?

1. The flocculation effect of the sludge is not good before entering the dewatering main body. The sludge can reach the ideal flocculation state only after the appropriate ratio of polyacrylamide (PAM). It will be filtered out from the gap between the dynamic and static rings. Of course, some sludges are not simply added with PAM, and some sludges have special properties and need to be added with PAC, flake alkali and other agents;

2. Another reason is that the design of the ring gap is too large. This is mainly because some manufacturers have not done the leveling of the dynamic and static rings well enough, and the flatness error is more than 10 wires. However, in order to reduce the wear of the dynamic and static rings and the blades of the spiral shaft, Only the thickness of the gasket can be increased, as a result, the gap between the dynamic and static rings becomes too large, and the sludge is filtered out. The flatness of the dynamic and static rings of standard manufacturers is around 5-7 wires. Don't underestimate the difference between these wires, which affects not only the dehydration effect, but also the service life of the sludge dewatering machine.

3. Of course, the equipment itself will also have an impact. For example, the gap between the dynamic and static ring pieces of the equipment is too large, the gap of the back pressure plate of the mud outlet is too small, and some manufacturers in order to save costs, the ring piece process is not up to standard, resulting in insufficient flatness, and the material is not 304 stainless steel will have the phenomenon of running mud.

4. The wear of the sludge filter press ring has exceeded the service life or the use of substandard products, which needs to be paid attention to when leaving the factory.

Solution for sludge leakage site in sludge filter press:

1. Before leaving the factory, the product quality must be strictly checked. Especially the cutting process of the ring piece and the machining process of the screw shaft. The flatness of the ring piece determines the thickness of the gasket. If the flatness of the ring piece is very high after cutting and leveling, the gasket with the lower thickness and the bottom can be used directly on the dynamic and static ring piece, so that it is not easy to run mud and leak mud. If the cutting of the ring piece is unqualified, and the leveling treatment is not carried out, the flatness of the ring piece is not enough, and the thickness of the gasket can only be increased to avoid direct friction between the dynamic and static ring pieces. The screw shaft is the main sludge dewatering component, and the screw blade should be treated with a full welding process.

2. After leaving the factory, if there is a phenomenon of mud running during debugging, you should contact the manufacturer immediately and assign after-sales personnel to deal with it. The parts that should be replaced should be replaced, and the substandard products should be returned to the factory for repair.

3. If there is a phenomenon of running mud during self-commissioning, first check the proportion of flocculant added, check whether the gap of the ring is too large, and whether the gap of the back pressure plate is reasonable.

4. At any time, if the cause cannot be determined, try to contact the manufacturer to obtain an accurate solution.

 

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