Chemical detoxification and neutralization or biological cleaning processes of industrial effluent generates fine sludge solids by way of heavy metal hydroxide fines. These sludge particles must be efficiently precipitated in a clarification stage prior to discharging the effluent via a polishing filter into a public sewer system.
In the case of continuous waste water fit and high sludge part, the settling cyclone proved effective.
Settling Cyclone
Application
Process Characteristics
The principle of the settling cyclone for detachment of solid particles of waste water and process effluent is the tangential current of effluent and the effect of centrifugal force on the solid particles.
Sludge and fine solids accumulate in the funnel ground. If required, a special wiper (Kraehlwerk) can be planned besides for avoidance of deposits in the cone. The clarified effluent leave the settling cyclone over an overflow pipe gutter.
If required, the stopping cyclone can be furnished besides with a flotat skimmer to remove swimming substances.
Description of plant
The effluent to be clarified flows into the upper zone of the round part. In the middle of the clarifying aggregate, a current spiral set downwards which continues itself to the lower field originates. In this case, the agglomerating solid particles receive a direction leading away down and/or radially outwards.
A rotating "particle cloud" which favours the agglomeration of the freshly precipitated voluminous solid flakes is in the lower field of the cyclone. The funnel-shaped enlargement in the upper field performs as clarifying zone. The cleaned effluent pours over an overflow pipe rim into the collecting gutter and enters to the polishing filter.
The precipitated sludge particles accumulate in the conical base of the funnel and can drain off continuously or periodically into a sludge storage tank.
The further drain of the thin sludge mainly occurs with a filter press. The plant is delivered connection completely. The combining pipelines only must be fit.