Plate and frame filter press is now more common use of industrial equipment, used in the early stage, feeding and dehydration speed is very fast, but the long time use is becoming more and more slowly. How is this going? Today the press management personnel to give everyone say. We first use the process of elimination of early, late is normal, not normal,that is not much of a problem. As is known to all, the plate and frame filter press is to rely on the positive pressure pressure dehydration, the water through the filter medium – tointercept the filter material. Material: if the latter does not change the process, this is notthe main reason. If the process is changed, it would have to consider whether the problemis the use of technology. The feed pump, used for a long time, feed pump will wearphenomenon, check the flow is reduced, the pump pressure is reached. Feeding before 70% time has no effect on the pressure, pressure is the pressure during dehydration is the key. In addition, whether the pump into the air, once in the air, pump into the material is very slow. Filter press cloth: the cloth after a period of use, the cloth will plug the pores, itwill greatly reduce the performance of dehydration. If it is because of the problem of filter cloth, filter cloth is recommended to the thorough cleaning by high pressure gun, washing,can also be used for cleaning industrial washing machine. The main is to filter the cracks in the material clean. To sum up, as you experience summed up the reason of press filteris poor, I hope for your solution to the problem of reference help.
1 plate and frame filter press filter cloth as the material, the filter holes size and interfacetechnique and other factors will affect the filtering effect of the filter cloth, filter cloth will also lead to blockage;
Using 2 polyester material, this material is generally applicable to the acid filtering material, but also of high temperature resistant, strong tensile, longitudinal and transversestability, wear resistance after nylon
Currently on the market, and this is the most widely used material for filter;
3 filter uses polypropylene, the material of the acid and alkaline resistance is better, the general use at temperatures below 90 degrees, the disadvantage is the low tensile strength. In general, most of the enterprises will not choose it, but there are some special industry will choose, this product is high alkali tolerance.
Filter clogging will seriously affect the filtering effect of plate and frame filter press and itswork efficiency, through the above analysis, I believe that everyone has more or less understanding of some of the heart. So, filter press equipment in daily work, choose suitable filter is the key.
Filter cloth washing the traditional way is to remove the filter cloth, soaked in water with a brush, cloth washing mode which is the most simple and effective;
High pressure water gun flushing method: in the premise of strong water pressure can bered to a part of the oil and wax, but not quite. Cloth capillary and oil in the wax clean.
Washing method of automatic cleaning filter cloth filter press is also very difficult to cleanthe oil and wax; recommend or by washing the most traditional fashion.
Filter cloth use matters needing attention:
The 1 filter cloth is hung too loose or too tight, too easy to dust, too easy to pull bad.
2 new and old bag should not be mixed, to avoid damaging the time different influence the normal operation of the equipment.
3 change from the bag, first with compressed air blowing, and then check whether the holes, holes for replacement after repair. As dust covered bag, water washing, drying for replacement.
The 4 filter cake to stop the suitable thickness, then work the cake unloading, which can prolong the service life of the filter bag.
5 change the filter bag filter bag can not be directly buckle down with a hard object, the application of force in the filter bag sewn on the auxiliary belt tension.
6 removing filter cake, the cake unloading tools and cloth should be kept parallel, in order to prevent damage to the filter bag.
7 installation of filter cloth, filter cloth shall ensure the frame part of the flat and fixed, so as to avoid cloth discounts in the frame compression damage cloth.
The 8 filter cake adhesion in the cloth on the time should not be too long, too long can cause deformation and drooping cloth.
9 removing filter cake, should follow the direction of the filter cake of filter cloth shovel.
Belt type filter press filter with the use of attention to matters:
Should correct measurements required cloth length (including joint length).
The stitching to ensure both ends of weft coincidence or parallel operation, to prevent thefilter cloth deviation.
The interface should pay attention to avoid the operation direction, blade barrier filter clothand filter cloth filter cloth or the interface damage blocked. Filter with the direction of the arrow to the running direction.
A, first select the filter pH environment:
Filtering environment is acidic or basic, and then can choose cloth material, nylon alkali resistant not resistant to acid; polyester resistant to acid not alkali resistant; polypropyleneand polyethylene acid and alkali resistant maximum span;
Two, the selection of filtering precision:
The filtering precision is higher, the higher the demand of cloth.
Three, filtration temperature selection:
Filtering environment over 100 degrees should choose or nylon and polyester, aramid,Xuan Wuyan and other materials, but the general environment, can be competent forpolypropylene;
Four, material selection:
Recovery of scarce resources should choose high filtration precision, no wear filter cloth,filter speed slower but generally this kind of cloth; selection filter fast common resources are appropriate, cloth and not easy to jam;
Five, the selection of filtering machine
Belt type filter press are generally filtered out of the ordinary material, so should beaccording to the cloth material particle selection filter speed fast;
The removable filter general filtration of scarce resources, therefore, require a higherfiltering precision of filter cloth;
Plate and frame filter press filter with the general viscosity of the material, and the pressure is bigger, so the strength and precision of the filter cloth have the very high request.