ZXS -L/W Series Automatic Backwashing Filter

Description

The ZXS-L/W automatic backwashing filter features an integrated brush and suction nozzle design, combining mechanical brushing and negative pressure suction into one. During cleaning, it ensures more thorough filter element cleaning and faster discharge, preventing residue and secondary contamination. The equipment operates with fully automatic control, eliminating the need for manual disassembly and cleaning, and enabling continuous online filtration.

Structure & Working Principle

The filter mainly consists of the filter vessel, filter element, cleaning mechanism, differential pressure control, electric control box, gear motor, and electric drain valve device, etc.

After the filtrate enters the filter through the inlet, it passes through the filter element within the filter column and enters the post-filter clean water chamber outside the filter element. Solid particles are isolated on the inner side of the filter element. As the filtration continues, the filter cake on the inner side of the filter element gradually thickens, increasing resistance and the pressure differential between the pre-filter and post-filter. When the pressure differential reaches the preset backwash differential, the differential pressure controller sends an electrical signal to open the automatic drain valve and start the main drive motor, which drives the drain pipe shaft to rotate. At this point, the drain pipe is open to the atmosphere, creating a low-pressure zone between the drain suction nozzle and the filter element. Clean water from the chamber enters the suction nozzle at high speed through the peripheral gap between the nozzle and the inner wall of the filter element, while simultaneously scouring away the impurity layer on the filter element wall and carrying it out through the drain pipe.

The backwash mechanism can also be manually or timer-activated to remove filter residue.

This structure also allows for periodic opening of the upper drain valve to remove floating matter from the top of the vessel. It is particularly suitable for seawater intake projects where algae and floating matter are present.

Competitive Advantage:

• Adapts to Fluctuating Water Quality: Ensures thorough cleaning even during sudden water quality fluctuations, preventing screen blockage and system shutdown.
• Maintains Online Discharge under Low Flow: Enables online discharge even in low-flow conditions, ensuring uninterrupted flow during backwash.
• Low Backwash Water Consumption: Instantaneous suction and discharge design significantly shortens the discharge cycle.
• Thorough Cleaning with Long Screen Life: No high-pressure water flush required, avoiding screen deformation or weld damage, ensuring consistent filtration precision.
• Compact & Flexible Installation: Directly mounts on horizontal or vertical pipelines; no external backwash pump or air compressor needed. Small footprint, ideal for retrofit projects.
• High Automation Level: Integrated dual activation (pressure difference /time), supports remote communication and manual forced discharge, reducing on-site inspection frequency.

Installation Methods

The ZXS-L/W automatic backwashing filter features two inlet installation methods: axial and lateral. The motor can be selected as vertical or horizontal. Production and customization are available according to specific requirements.

Inlet Installation Methods

Specifications

Technical Specifications

Model& Specification

Notes:

① The above are the parameters of the standard product. Customization is available.

② Model description:

③ The above filter size is designed for vertical installation; if horizontal installation is required, customized design dimensions are needed.

Applications:

• Industrial and Domestic Water Supply: Surface water source filtration (rivers, reservoirs, lakes, swimming pools) and groundwater source filtration. Typical applications include water supply for paper mills, water conservancy projects, and water intake systems.
• Circulating Water Treatment: Circulating water in cooling towers, air conditioning systems, refrigeration systems, makeup water systems, heat exchangers, and ash handling water.
• Industrial Circulating Water Filtration: Particularly suitable for industrial water treatment in sectors such as steel, chemical, power, automotive, electronics, food, paper, and sugar.
• Wastewater Treatment: Pre-treatment for tertiary wastewater treatment processes, reducing subsequent treatment costs.
• Filtration of Highly Corrosive Media:seawater, brackish water, acid solutions, alkaline solutions, etc.
• Power Stations: Circulating water filtration in power stations, turbine technical water supply, seal water filtration, secondary strainers, drum screen wash water automatic backwash filters, ECS terminal filters, condensate filters, auxiliary cooling water filters, etc.

Hot Tag:Self-cleaning filter, backwash filter, Backwashing filter, Brush Filter, Backflushing filter, wedge wire screen filter