the filtering process describe in detail
the filter are divided into three types
The general principles of the filter is: after the pulp porous filter medium (usually filter cloth) make solid materials and liquid separation process. At this time the liquid (filtrate) after the baffle plate of the pore outflow, and solid particles stop in the surface of the filter cloth,triboelectric separator and formed the compaction filter cake. Filter is generally dehydration of the second stage.
Concentrator is now commonly used in continuous type vacuum filter machine, its type many, according to filter the shape of the face different divided into the cylinder and the disc. The cylinder is divided again within the filtration style and filtration style. In recent years has been widely used magnetic separation plant outside filtration style magnetic filter.
the commonly used type vacuum tube filter work principle
Tube type vacuum filter is to use the filter cloth (nylon cloth, canvas) to the filter. The filter cloth fiber formation between many wool stoma, pulp in the cloth by vacuum pump into negative pressure, the pressure on the effect of the liquid flow through filtering pulp BiZi become the filtrate, pulp of solid particles were blocked filter cloth in filter cake form, as time increases, the thickness of the filter cake will increase, most of the water is eliminated, complete dehydration work.
Our country to apply the cylinder vacuum filter basically can be classified into four categories: 1) the cylinder of vacuum filter filter; 2) cylinder internal filtration type vacuum filter machine, 3) the cylinder of vacuum filter magnetic filter (hereinafter referred to as magnetic filter machine), 4) fold belt type vacuum filter.
the filtering process describe in detail
In the filter, the greater the vacuum, the greater the material particle size and viscosity of pulp, the smaller the filter cake, the more is thin, the filtering effect more, filtration speed faster. However, in the actual production of filtering process is a very complex physical process, sometimes vacuum degree, grain size, cake thickness and is not very ideal. Vacuum degree, material particle size, cake thickness is between that restricts each other, and there is not alone. Influence of filter machine speed factors must be combined with concrete situation of concrete analysis. For example of the filter cake thickness is thin, the faster the filtering, but is too thin will make the whole filter face permeability is too big, still can make cake thickness not even, even a partial leak phenomenon, these can cause leakage vacuum, namely the filter cake of vacuum sealing not make less, so that it will slow down the filter waste.
