Bag Filter Introduction
The bag filter is an efficient filtration equipment adopting filter bags as the core filter element. It is composed of filter housing, filter bags, inlet and outlet pipelines, quick-opening device and drain valve. Filter bag materials are optional including nylon, PP, stainless steel, etc., with a wide filtration precision range of 1-100μm. It is mainly used to remove suspended particles, impurities, oil stains and other contaminants in water. Featuring simple structure and easy operation, it is suitable for various medium and high-precision filtration scenarios. With balanced filtration efficiency and convenient maintenance, it is a commonly used filtration device in industrial and civil water treatment.
Working Principle of Bag Filter
It operates on screening filtration technology, relying on the porous interception function of filter bags. Under pressure, raw water enters the filter housing. Through the filtering effect of the filter bag, suspended particles and impurities larger than the bag pore size are trapped on the surface of the filter bag, while clean water passes through and discharges via the outlet pipeline to realize solid-liquid separation. When the filter bag accumulates excessive impurities and the inlet-outlet pressure difference reaches the set value, shut down the equipment, open the quick-opening device to replace the filter bag, or clean the reusable filter bag to restore filtration capacity and ensure stable filtering performance.
Advantages of Bag Filter
Firstly, adjustable filtration precision: Filter bags with different pore sizes can be selected to meet diverse filtration requirements. Secondly, high filtration efficiency: Large surface area of filter bags provides strong contamination holding capacity for fast filtering of large amounts of impurities. Thirdly, convenient operation and maintenance: Quick-opening design enables fast filter bag replacement without complex tools, lowering maintenance costs. Fourthly, strong adaptability: It can treat water with different viscosity and impurity content; customized housing materials are available for industrial and civilian scenarios with no secondary pollution.
Application Fields of Bag Filter
It covers a wide range of filtration scenarios: Mainly used in industrial wastewater treatment to remove suspended impurities and oil stains, laying a foundation for subsequent advanced treatment. Applied in food processing and beverage brewing to filter impurities in raw water and guarantee product quality. Also used in electronics and pharmaceutical industries to filter fine impurities in production water to meet high-precision water standards. Additionally, it is suitable for domestic water pretreatment, swimming pool water purification, lubricating oil filtration and other scenarios to satisfy various filtration demands.
Process Flow of Bag Filter
Process Flow Chart of Bag Filter
The process flow of the bag filter is divided into five steps: 1. Water inlet pressurization: After pretreatment, raw water enters the filter housing under pressure; 2. Bag filtration: Raw water flows through the filter bag with impurities intercepted to produce clean water; 3. Water output delivery: Clean water is transported to subsequent treatment units or water terminals through outlet pipelines; 4. Filter bag maintenance: When the pressure difference exceeds the standard, shut down the equipment to replace or clean the filter bag and discharge trapped impurities; 5. Cyclic operation: Restart the equipment after maintenance to resume filtration and realize continuous and stable water supply.
