I. Security Filter

The security filter is equipped with wound honeycomb filter elements or melt-blown filter elements and is used for the filtration of production water in industries such as drinking water, domestic water, electronics, printing and dyeing, textile, and environmental protection, alcohol filtration, pharmaceutical filtration, acid and alkali filtration, and reverse osmosisROPre-membrane security filtration features high flux, low consumable cost, polished or matte surface, and inner surface pickling and passivation treatment. The inlet and outlet, sewage pipes are equipped with automatic control valves and controllers, which can be automatically backwashed.

Ii. Main Technical Parameters of Security Filters

Work pressure0.05MPa－1MPa

Operating temperature5℃－40℃(Special temperatures can be customized

Filter element interface: flat pressure type, insertion type

Filtration accuracy1μm－5μm

Number of filter elements7core

Filter element length30'

Cylinder material304

Iii. Working Principle of Security Filters

Security filtration uses formed filter materials. The raw liquid passes through the filter material, the filter residue remains on the wall of the filter material, and the filtrate passes through the filter material and flows out, thus achieving the purpose of filtration.

The formed filter materials include: filter cloth, filter screen, filter sheet, sintered filter tube, wound filter element, melt-blown filter element, microporous filter element and multi-functional filter element. The pore size of the filter varies due to the difference in filter materials. Precision filtration is a type of filtration that lies between sand filtration (coarse filtration) and ultrafiltration, with a filtration pore size generally ranging from0.1-120μmScope. Filter materials of the same form are further classified into different specifications based on their external dimensions. There are two types of wound filter elements (also known as honeycomb filter elements) : one is made of polypropylene fiber-Polypropylene skeleton filter element, high operating temperature60℃; Another type is absorbent cotton fiber-Stainless steel frame filter element, high operating temperature120℃.

Iv. Characteristics of Security Filters

1. Material and structure

Cylindrical shell304Stainless steel, with single or multiple filter elements.

2"Specification"

Number of filter elements: Single or multiple filter elements.

Filter element length: single section, two sections, three sections, four sections (per.10″(As one section);

Filter element installation forms: universal flat pressure type, snap-in type and insertion type;

Connection methods between the cylinder and the base: quick-opening type, flange type.

Connection methods for medium inlet and outlet: quick-opening type, threaded type, and flange type.

Filtering media: liquid, gas.

3. Performance characteristics

(1High filtration accuracy and uniform pore size of the filter element;

(2It features low filtration resistance, large flow rate, strong dirt interception capacity and long service life.

(3The filter element material has a high degree of cleanliness and does not pollute the filter medium.

(4Resistant to acids, alkalis and other chemical solvents;

(5It has high strength, can withstand high temperatures, and the filter element is not prone to deformation.

(6Low price, low operating cost, easy to clean, and the filter element is replaceable.

V. The Function of Security Filters

Security filters are often installed after pressure filters to remove fine particles from the liquid to meet the requirements for the incoming water in subsequent processes. Sometimes they are also set at the end of the entire water treatment system to prevent fine particles from entering the finished water. The commonly used filter elements have the following specifications:0.1, 0.2, 0.5, 0.8 ,1, 2 ,3, 5 ,10 ,20, 30 ,50 ,75 ,100,120μmSecurity filters are often used as security filters for devices such as electrodialysis, ion exchange, reverse osmosis, and ultrafiltration.