Precision filter (also known as security filter), the cylinder shell is generally made of stainless steel, and the interior uses tubular filter elements such as PP melt-blown, wire-fired, folded, titanium filter, activated carbon filter, etc. Choose different filter elements according to the specific filter medium and design process to meet the requirements of effluent water quality. It is used for solid-liquid separation of various suspensions, high environmental requirements, and liquid medicine filtration with high filtration accuracy. It has a wide range of applications and is suitable for industrial fields such as medicine, food, chemical industry, environmental protection, and water treatment.

Precautions for frequent replacement of security filter elements:

(1) The raw water quality is unstable and fluctuates frequently, resulting in too much particulate matter entering the filter element, resulting in a shortened cycle;

(2) The pretreatment operation effect is poor. The flocculant and scale inhibitor added in the pretreatment are incompatible with each other or do not match the water source. The sticky substance formed adheres to the surface of the filter element, resulting in a decrease in the filter area of the filter element and frequent replacement of the filter element. ;

  (3) The quality of the filter element is not good. The internal and external pore diameters of poor-quality filter elements are basically the same. In fact, only the outer layer acts as an interceptor, while the filter pore size of a good filter element decreases step by step from the outside to the inside, and the filtration accuracy of the inner layer is 5±0.5 µm, the dirt-holding capacity is larger, and the water quality can be guaranteed to be qualified for a long time.

Measures to prolong the service life of security filter elements:

  (1) The water source is generally a fixed water source and cannot be easily changed;

  (2) Improve the operation effect of pretreatment, optimize the dosage of flocculant and coagulant aid, select the scale inhibitor suitable for the water source, adjust the pretreatment equipment to achieve the best operating state, and strictly follow the requirements of the operating procedures to ensure the quality of the pretreated effluent qualified;

  (3) Select the brand filter element with guaranteed quality, which can not only prolong the service life of the filter element, but also ensure the water quality of the security filter.