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The important role of reasonably installed and maintained bag filters
The important role of reasonably installed and maintained bag filters1. Before installing the equipment, clean the clean room in many aspects to ensure that there is no dust inside the system, if the filter is installed in the mezzanine or ceiling, then the mezzanine and ceiling should also be cleaned in many aspects; 2. Before installing the air filter, try not to tear the outer layer of the protective film, store it according to the instructions on the packing box, and pay attention to light handling and avoid violent vibration and collision; 3. In the installation of equipment in the correct direction, in strict accordance with the instructions for the installation of steps to avoid leakage, deformation, damage, etc., after the installation is complete, but also to ensure the cleanliness of the inner wall so that there is no floating dust, oil, rust, and debris; 4. Before installation, the packaging needs to be unpacked for inspection to see if there is damage to the filter paper, sealant, and frame; whether the edge length, thickness, size, etc. meet the production requirements; whether the frame burrs and rust spots, etc.; whether the product has a certificate of conformity, whether the performance is in line with the design requirements, etc., wait until after the inspection and installation; 5. Under normal circumstances, coarse or medium efficiency filters are usually replaced once every 1-3 months, and the replaced filter media can be cleaned and dried before installation; 6. The resistance value of the high-efficiency filter is greater than 460Pa, or when the airflow speed of the air outlet surface drops to a low limit or the surface of the leak can not be repaired, need to be replaced promptly, if there is no such case, the use cycle is generally 1 to 2 years; 7. In the case of bag-type coarse or medium efficiency filters, they are usually replaced once every 8 to 10 weeks under normal use; 8. Sub-efficient filter in the normal use of the cycle of 5 to 6 months, more than also need to replace; 9. To give full play to the role of air filters, in the selection and use of the process should pay attention to the head-on wind speed of the filter, coarse or medium efficiency filters should be less than 2.5m/s, sub-high efficiency filters and high-efficiency filtration should be less than 1.5m/s, so that not only to protect the filter filtration effect but also to properly extend the service life of the filter; 10. In some biological clean rooms and pharmaceutical clean rooms and another special environments must use a metal frame air filter to ensure that its surface is not easy to rust in the process of use, can not use the wooden frame plate filter, so as not to produce bacteria and other phenomena; 11. The air filter and the frame must be strictly sealed to ensure that there is no leakage; and for equipment that often works in high humidity and high-temperature environments, it is necessary to choose filter paper with high temperature and high humidity performance and divider, frame material to ensure the efficiency of filtration; 12. When the filtration equipment is running, the filter cannot be replaced, if it is encountered that the replacement period has come to an end but can not be stopped to replace the situation, only in the case of non-stop fan to replace the coarse, medium-effect filter, while the sub-high efficiency filter and high-efficiency filter must wait until after the shutdown can be replaced. |
