How to extend the service life of filter press filter cloth

　 1 Preparation before filter cloth replacement Under normal circumstances , all parts above the filter press filter plate must be cleaned and washed before removing the old filter cloth . It is best to finish the maintenance work on the filter press. After removing the old filter cloth, washed with high pressure water filter plate, filter plate fouling ensure, without clogging the filter holes, the bottom of the filter plate flow diversion hole, to install a new filter cloth. Thus, on the one hand, can prevent fouling of the filter falls above the filter plate holes clogged filter, the flatness of new cloth, or fouling fall new cloth, cloth pollution, reduce the filtration effect; the other On the one hand , it is possible to prevent the person working on the filter press from stepping on the dirt falling on the filter plate or the new filter cloth , so that it adheres tightly to the filter plate or the new filter cloth , or stepped on the filter cloth. Hard objects on the board , scratching the filter cloth. It should be forbidden to throw the tools on the filter cloth at random to damage the filter cloth. The facts tell us that the preparation work is not in place , the use of new filter cloth will be greatly reduced , and the service life will be greatly shortened. Sometimes, put on new cloth, a use found holes, or twelve days appeared damaged, although patched, filter cloth usage has changed, certainly speed up the frequency of breakage, otherwise use Third, Five months of filter cloth , and finally barely maintained a month. The filter cloth is frequently damaged . If it is not repaired in time , the solid content of the finished dilute acid or each washing liquid will inevitably increase. The consequences are : on the one hand , the quality of the dilute acid is degraded , which is unfavorable for the subsequent concentrated production and operation of other acid plants ; on the other hand , the filter press chamber and related equipment and pipeline fouling are intensified , the device is frequently stopped , and the production capacity is inevitable. Affected.

　　 2 embedded filter cloth installation

On a clean filter plate, filter cloth adhesion new paved, and then install the special rubber bead, a cloth filter plate fixed on the flat, to ensure that the filter plate is completely embedded in the rubber bead slot. Such a cloth mounting medium through resistance, good filtering effect, the entire filter cloth will not block off the skin, prolong the service life of the filter cloth. Of course, in the process of mounting and fixing the filter cloth, avoid hard objects, sharp strikes the cloth.

　　 3 filter cloth use and maintenance

The quality cloth filter effects, using the length of time, and usually use the case of maintenance have a great relationship. In general , a higher wash water temperature favors the washing and regeneration of the filter cloth , but not as high as possible. We know that the filter cloth filter cloth is mostly made of non-metallic materials, and the excessive washing water temperature will accelerate the aging of the filter cloth. For potassium, sodium higher ore, the filter cake will contain more or N a2SiF6 K2SiF6, lotion high temperature will cause hydrolysis fluorosilicate and colloidal silica in CaF2, clogging, so wash The water temperature is not too high. Generally , the wash water temperature should be controlled at 60 to 70 °C . The filter cloth of the filter press is fixed on the filter plate by the rubber bead . After running for a period of time , some of the bead will be turned out of the slot , causing the filter cloth to protrude , increasing the friction with the filter plate, and the damage rate is improved. Therefore , once this situation is discovered, it should be stopped immediately. If the filter cloth is damaged , it should be repaired in time. Note: Be sure to check the filter press for large foreign objects ; before shutting down the filter press , the filter plate is cleaned with water for more than 15 m in . To carry out maintenance work on the press, in particular for welding or cutting operation when, sure covered wood or cardboard or the like covering on the filter plate, filter cloth, filter cloth to prevent damage, reducing the breakage rate and extended filter Cloth cycle , reducing production costs

Related accessories: Precautions for use of filter press filter cloth.doc