Working principle of security bag filter

Security bag filter is a pressure filter device, and its working principle is as follows:

Filtration process: The liquid to be filtered flows into the filter bag from the filter inlet. After the liquid medium enters the filter, it flows in from the top of the filter bag, so that the liquid can be evenly distributed on the entire filter surface of the filter bag. Under the action of working pressure, the liquid passes through the filter bag, and the impurity particles are intercepted by the filter bag. After the clean and qualified filtrate passes through the filter bag, it flows out from the outlet, thereby achieving solid-liquid separation.

Function of filter bag: The filter bag is the key filter element of the bag filter, and its material and precision determine the filtering effect. Different filtering requirements will choose filter bags of different materials and precisions. For example, for occasions with high precision requirements, filter bags with higher filtration precision will be selected, which can intercept tiny particles or suspended matter.

Advantages of security bag filter:

High filtration precision: You can choose filter bags with appropriate precision according to different filtration requirements. The filtration precision range is usually 0.5-200 microns, which can effectively remove impurities such as fine particles, suspended matter, colloids, etc. in the liquid to ensure the purity of the filtrate.

Strong dirt holding capacity: The filter bag has a large filtering area and dirt holding capacity, which can accommodate more impurities, reduce the frequency of filter bag replacement, and reduce operating costs. Moreover, it also has a good filtering effect on some non-rigid, easily deformed, and viscous difficult-to-filter materials.

Easy operation: The filter has a simple structure, easy operation, and quick replacement of filter bags. Generally, you only need to take out the old filter bag, put in the new filter bag and fix it. The whole process usually only takes a few minutes, which greatly shortens the downtime and improves production efficiency.

Good sealing: The sealing performance between the filter bag and the filter housing of the bag filter is good, which can effectively prevent the leakage of unfiltered liquid and ensure the filtering effect and safety2.

Strong adaptability: It is suitable for filtering a variety of liquids, such as aqueous solutions, oily liquids, corrosive liquids, etc. At the same time, it also has good adaptability to different working temperatures and pressure conditions, and the working temperature is generally 5℃ - 120℃.

Low cost: Compared with some other filtering equipment, the price of bag filters is relatively low, and daily maintenance only requires the replacement of filter bags. The filter bags are cheap and the overall operating cost of the equipment is low.

Small footprint: The equipment has a compact structure, small size, and small footprint, making it easy to install in various production sites, especially in places with limited space. 3.

Reusable: Some filter bags can be reused after cleaning, further reducing the cost of use.

Application areas of security bag filters:

Water treatment industry:

It is an important protective equipment before membrane separation systems such as reverse osmosis, ultrafiltration, and nanofiltration. It can remove impurities such as suspended matter, colloids, and microorganisms in water to prevent these impurities from clogging and damaging the subsequent membrane treatment system, and ensure the stable operation and service life of the membrane system.

In drinking water treatment, it is used to remove trace suspended particles, organic matter, bacteria, etc. in water to improve the quality and safety of drinking water.

In industrial wastewater treatment, it can be used to remove pollutants such as heavy metal ions, suspended matter, and organic matter in wastewater to meet environmental emission standards.

Food and beverage industry: It is used in the production process of various foods and beverages, such as filtering impurities, sediments, and microorganisms in raw materials such as edible oils, syrups, juices, and beverages to ensure the quality and taste of the products.

Pharmaceutical industry: In the pharmaceutical process, it can be used to filter liquid medicine, intermediates, raw materials, etc., remove impurities, particles, bacteria, etc., to ensure the purity and quality of the medicine. For example, filter medicinal syrups, plant essences, catalysts, etc.

Chemical industry: used for filtering and purifying chemical raw materials and products, such as filtering impurities and particles in lubricating oils, petroleum products, resins, coatings, inks, etc., to improve product quality and performance.

Electronic industry: It can be used to filter chemical slurries, chip grinding wastewater, cooling water, etc. in the production process of electronic components, remove impurities and particles, and ensure the production quality of electronic components.