Service life and pressure difference of filter bag
In the actual use process, the equipment of the filter bag, to some extent, has good sealing performance and strong circulation ability, but if it is not cleaned for a long time, it will largely cause internal pollution of the machine. An indispensable device on the medium transmission pipeline of the filter, which is usually installed at the inlet of the pressure reducing valve, pressure relief valve, constant water level valve and other equipment of the square filter. The filter is composed of cylinder, stainless steel filter screen, blowdown part, transmission device and electrical control part. The filter bag mainly includes two types: liquid filter bag and air filter bag. As a filter element, the filter bag guide is a key link in the filtration process. The quality of the filter bag largely determines the filtering effect of the user and can meet the application in various fields. In order to purify the original ecological resources and reuse the resources, Xiexin needs purification equipment. The filter element has the characteristics of low differential pressure, strong contaminant capacity and long service life; It is applicable to vacuum coating, machinery, optical disk, metallurgy, petroleum, refrigeration equipment and other fields. Although the filter bag has good sealing and strong circulation ability, if it is not cleaned for a long time, it will also cause great pollution inside the machine. Therefore, pay attention to the cleaning and maintenance of the filter bag. For cleaning time, generally speaking, we can refer to the value of the pressure gauge installed on the inlet and outlet pipes of the filter bag, and determine the time to replace the filter bag by the pressure difference displayed on the front and rear pressure gauges. Generally, the filter bag can withstand a pressure difference of about 0.5-1 kg/cm2. When the pressure difference reaches this interval, the filter bag should be replaced in time to avoid the filter bag breaking and affecting the filtering effect.
For the filter bag cleaning process, first of all, our teachers can stop the raw water pump and close the inlet and outlet valves; Secondly, we can open the drain valve and exhaust valve, empty the filter and design the internal water storage; Finally, disassemble the filter and clean the filter bag. When cleaning, we think that as long as students put a little cleaning solution in it and soak it for more than ten minutes, the impurities in the filter bag can be removed without cleaning technology. At the same time, it should be noted that warm water system should be used to clean the data as much as possible, so as to make it cleaner.
If we want to extend the service life of the filter bag, we should pay attention to its maintenance in addition to regular cleaning during use. We should always check whether the connecting pipes are firm, whether there is leakage or damage; When replacing the filter bag, if the sewn filter bag is used, pay attention to fold the sewn edge of the filter bag and put it in, which can improve the filtering effect of the sewn filter bag. Place the filter bag, and pay attention to the match between the loop of the filter bag and the neckline of the metal inner mesh.
When pressure is found at the outlet of the filter bag, the output valve must be closed in time.