The shell of the security filter cylinder is generally made of stainless steel, and the interior uses tubular filter elements such as PP meltblown, wire burning, folding, titanium filter elements, and activated carbon filter elements as filter elements. Different filter elements are selected according to different filter media and design processes. Meet the water quality requirements. It is used for the solid-liquid separation of various suspensions, the filtration of medicinal liquids with high environmental requirements and high filtration accuracy, and a wide range of applications, suitable for pharmaceutical, food, chemical, water treatment and other industrial fields.
1. There are three functions of adding a security filter in front of reverse osmosis
1. During the operation of reverse osmosis, in order to prevent the entry of residual chlorine and the scaling of the reverse osmosis membrane, two agents, reducing agent and scale inhibitor, may be added. These two agents may contain some particulate impurities, and the reverse osmosis device is running. The pressure is very high. Under the high pressure, the particulate impurities entering the reverse osmosis membrane will break the membrane layer, causing physical damage to the reverse osmosis membrane, and the quality of the reverse osmosis water will be seriously affected; these particles will also foul and block the reverse osmosis membrane, causing reverse osmosis. The pressure difference between the osmosis membrane sections rises, the reverse osmosis water production decreases, and the yield is low, which shortens the chemical cleaning time of the reverse osmosis membrane, so a security filter should be added.
2. The rupture of the ultrafiltration membrane wire is not solved in time, causing the raw water to enter the reverse osmosis membrane, and the particulate impurities in the raw water will also scratch the membrane layer. In order to prevent the particulate impurities in the ultrafiltration water tank from entering the reverse osmosis membrane, a security filter should also be added.
3. The aluminum salt (polyaluminum chloride) added in the pretreatment water from the water purification plant will cause scaling of the reverse osmosis membrane, and the security filter can remove part of the aluminum salt.
In short, the function of adding a security filter is to ensure that the water quality entering the reverse osmosis membrane is qualified, to protect the reverse osmosis membrane, and to improve the water yield and water quality of the reverse osmosis membrane.
Second, the maintenance of security filters
1. The core component of the security filter is the filter element, which is a fragile component and requires special protection.
2. When the security filter works for a long time, it will intercept some impurities, which will reduce the working speed, so it should be cleaned frequently, and the filter element should be cleaned at the same time.
3. During the cleaning process, special attention should be paid to the cleaning of the filter element, and do not deform or damage it, otherwise the filtration accuracy will be reduced and the production requirements will not be met.
4. If the filter element is found to be deformed or damaged, replace it immediately.
5. Some filter elements cannot be used repeatedly, such as bag filter elements, polypropylene filter elements, etc.
The above is the function of adding a security filter in front of the reverse osmosis introduced by the editor. I hope you can have a further understanding of the security filter after reading it.
