Liquid purification or separation – Sectional chamber press type – With repair or assembling means
Patent
1984-08-22
1986-05-27
Miles, Tim
Liquid purification or separation
Sectional chamber press type
With repair or assembling means
B01D 2515
Patent
active
045914354
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to the chemical engineering industry, more specifically to filter presses featuring large filtration surface areas.
BACKGROUND OF THE INVENTION
In view of the ever increasing production volumes in most industrial branches much attention is being devoted lately to environmental protection, the more stringent requirements being imposed upon separating from sewage water industrial waste products which include solid matter and dissolved harmful substances.
One important waste water purification process stage involves recovery of solid phase from suspension by filtration.
Vacuum filters and centrifuges are generally employed for filter-separation of easily filterable suspensions having a rather low hydraulic resistance. For filtering suspensions that are more difficult to filter, that is suspensions processing a rather high hydraulic resistance where use in normally made of filter presses.
Modern developments in the art of filter construction have taken special care to provide a larger filtering surface within one unit used in industrial fields where large bodies of suspensions have to be treated. This has been caused by the fact that the use of a multitude of small filtering surface filter presses result in excessive specific manufacturing and operating expenditures per unit area of the filtering surface. The expenditures thus encountered are accounted for by the fact that each small capacity filter press is to be equipped with independent automatic process control units, sets of valving fixtures, and other auxiliaries requiring numerous attending personnel.
It is to be noted that an increase in the filtering surface entails, due to employing a greater number of filter plates in the filter press, a problem associated with assuring a reliable hermetization of the filter plate assemblies.
However, no satisfactory solution to these problems has been found in the prior art filter press constructions.
Major demands placed on filter press constructions include the provision of high filtering capacity, as well as obtaining filter cakes of minimized moisture content and in some instances of minimal content of substances extractable from the cake inside the filter press.
There is known a filter press which includes a frame mounted on posts and accommodating an assembly of filter plates with a means for clamping or compressing these filter plates (cf., West German Application No. 2,707,828; published 1978).
The means for clamping the filter plate assembly includes a drive secured on the posts at one end of the frame, a thrust plate also arranged on the posts at the opposite end of the frame, a pressure plate, and braces. The filter plate assembly is interposed between the pressure and thrust plates.
The filter plates are connected therebetween and with the thrust and pressure plates by linkages providing for spacing all the plates at substantially equal distances, which enables to remove filter cake. The braces connect the thrust plate and the drive of the means for clamping the filter plate assembly.
In the course of clamping the filter plate assembly the drive of the clamping means acts on the pressure plate to compress the filter plates between the pressure and thrust plates. Therewith, the braces connecting the thrust plate and the drive of the means for clamping the filter plate assembly take up the compressive force to thereby assure hermeticity of the filter plate assembly.
For taking off the filter cake the means for clamping the filter plate assembly is engaged which acts to withdraw the pressure plate and space all the filter plates at equal distances, whereafter the cake is removed.
In the above filter press the movable member of the drive for clamping the filter plate assembly has a limited length determined by necessary strength characteristics. Therefore, the work stroke of the movable member of this means is limited by its size, which in turn leads to restrictions in the number of filter plates in the assembly, since the total length of spaces between the
REFERENCES:
patent: 1498313 (1924-06-01), Ahlum
Malyshkin Alexandr A.
Onufriev Vladislav N.
Pertsev Leonid P.
Pichakhchi Alexandr F.
Pryadkin Pavel P.
LandOfFree
Filter press does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Filter press, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter press will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1570169