Multi-column automatic backwashing filter - Industrial high-flow water treatment and purification equipment

Product basic parameters and core structure

1. Water filtration equipment main structure: Vertical multi filter column parallel structure, with multiple sets of independent filter columns arranged inside the cylinder, matched with backwash rotating suction cup mechanism and top reducer drive unit; A maintenance port is reserved on the side of the cylinder, and a manual and electric drainage port are set at the bottom to facilitate internal maintenance and waste discharge of the equipment.

2. Filter element: Johnson wedge-shaped filter or metal woven mesh is used, with high structural strength, strong deformation resistance, and can withstand negative pressure suction backwash flushing; The filtration accuracy range is 10 μm to 3000 μm, and the accuracy can be customized according to the inlet water quality and downstream equipment requirements.

3. Control unit: Equipped with a microcomputer program controller, it supports pressure difference control and timed control dual mode triggering backwash, real-time collection of inlet and outlet pressure difference data, and automatically starts the backwash program when the pressure difference reaches the set threshold or the timer reaches the preset duration.

4. Backwash mechanism: The reducer drives the rotating suction cup to accurately position it on the outside of a single filter column, and uses the system pressure difference to form a negative pressure zone, which sucks and peels off impurities attached to the inner wall of the filter column and discharges them with the sewage; Only single column offline cleaning is performed, while the remaining filter columns remain online for filtration.

5. Material selection: The shell can be made of carbon steel anti-corrosion or 304 stainless steel; The internal filter column, suction cup, and rotating mechanism can be made of 304/316L stainless steel material, suitable for clean water and mildly corrosive industrial media.

6. Operating characteristics: Column by column rotation backwashing, uninterrupted water supply for the entire machine; Low backwashing frequency, low water consumption for sewage discharge, and low system operating pressure loss.

7. Maintenance design: The cylinder is equipped with a large-sized maintenance manhole, which facilitates later access to the interior of the cylinder for maintenance and replacement of filter column components, reducing the difficulty of operation and maintenance.

8. Factory inspection: Each device undergoes shell pressure sealing test, electronic control program debugging, backwash action simulation test, supporting product drawings, inspection reports, and product certificates to meet the requirements of engineering bidding and project acceptance.

Applicable industries and equipment operating conditions of the product

1. Metallurgical industry: heavy metal waste cleaning and recycling of washing water, cooling circulating water, condensate water filtration, applied in continuous casting water, blast furnace water system, hot rolling high-pressure water descaling system, intercepting iron oxide scale and solid particle impurities, protecting nozzles and water pumps, and ensuring production continuity.

2. Chemical and petrochemical industries: brine treatment, industrial process water, circulating cooling water purification, interception of solid particles and impurities inside the medium, purification of chemical process medium, stabilization of medium quality, protection of back-end heat exchangers and precision equipment.

3. Power and thermal power plants: wet electrostatic precipitator spray water, spray circulating ash water, condensate water, desulfurization wastewater filtration, removal of suspended solids in water, prevention of spray nozzle blockage, and stable operation of the spray system.

4. Oilfield field: Oilfield wastewater filtration, filtering out suspended particles in oily wastewater, stabilizing the quality of reinjection water, and meeting the water quality requirements for oilfield formation reinjection.

5. In the fields of light industry and municipal engineering: papermaking, medicine, food, mining, urban water supply engineering, used for the pretreatment of industrial condensate water and washing wastewater, as a pre security unit for water treatment, reducing the pollution load of back-end membrane components and precision equipment.

There are significant differences between multi column automatic backwash filters and single cylinder brush self-cleaning filters, as they adopt a parallel structure of multiple filter columns, resulting in a larger effective filtration area; The backwashing method is negative pressure suction instead of mechanical brushing of the filter screen, which has higher cleaning intensity and more thorough removal of dirt. The equipment will not cut off the main pipeline water flow during backwashing operations. The single filter column takes turns offline cleaning, while the other filter columns continue to filter. It is suitable for industrial circulating water systems with high flow rates and 24-hour uninterrupted operation, and is the preferred equipment for pre filtration in large-scale water treatment projects.

Core competitive advantages of the product

1. Multi column parallel design, continuous filtration without interruption: backwashing is rotated column by column, and while cleaning a single filter column, the remaining filter columns remain online for filtration. The system flows continuously throughout the entire process, meeting the requirements of continuous industrial production.

2. Microcomputer intelligent program control: automatic monitoring of pressure difference, timed start stop, fully automatic completion of the entire process of filtration, backwashing, and sewage discharge, low operating costs, and reduced manual inspection workload.

3. High efficiency and low energy consumption: sufficient effective filtration area, low backwash frequency, low sewage water consumption, low system pressure loss during operation, and reduced energy consumption of the system pump group.

4. Thorough and reliable backwashing: The unique filter structure combined with negative pressure suction cleaning method has high backwashing strength, and impurities attached to the inner wall of the filter column are completely peeled off, making it less likely for the filter to clog.

5. Wide range of applicable media: accuracy coverage of 10-3000 microns, material options include carbon steel, 304, 316L stainless steel, suitable for clean water, mildly corrosive media, and wastewater containing suspended particles.

6. Convenient maintenance: The cylinder body is reserved with a large maintenance manhole for easy inspection and maintenance of the internal filter column; Automated operation, simple operation and management.

Frequently Asked Questions FAQ

Q1: What is the working principle of the multi column automatic backwash filter?

A: The water to be filtered enters the filter housing, and suspended impurities in the water are trapped inside the Johnson wedge-shaped filter or metal woven mesh; Accumulation of impurities can cause an increase in pressure difference between the inlet and outlet. When the pressure difference reaches the set value or reaches the preset cleaning time, the electronic control system sends a signal to drive the backwash mechanism. Align the backwash suction cup with the inlet of the filter column, open the drain valve, and use the system pressure difference to form a negative pressure zone on the inside of the filter column. The external purified water passes through the filter screen in reverse, stripping off the impurities adsorbed on the inner wall and discharging them with the drain pipeline; After cleaning is completed, the rotating mechanism switches to the next filter column and cleans each column one by one. The remaining filter columns continue to filter, and the main pipeline runs continuously throughout the entire process.

Q2: What are the main differences between multi column and single cylinder brush self-cleaning filters?

A: The core difference lies in the structure and cleaning method. Multiple columns are connected in parallel, relying on negative pressure suction for backwashing. Single column offline cleaning results in a larger total filtration area and more thorough cleaning; The single cylinder brush relies on the built-in brush body to mechanically clean the filter screen, forming a single filter cylinder structure. Multi column filters are preferred for high flow conditions, while single cylinder brush filters can be used for limited space and small to medium flow scenarios.

Q3: What range of equipment filtering accuracy can be selected?

A: The standard accuracy covers 10 μ m to 3000 μ m, and the filter accuracy can be selected according to the suspended solids content of the raw water and downstream equipment protection requirements. Special precision customization is also supported.

Q4: Will the water flow in the main pipeline be interrupted during backwashing?

A: It won't interrupt. The equipment adopts column by column rotation cleaning, with only one filter column temporarily offline backwashing, while the rest of the filter columns continue to filter. The main pipeline maintains water supply, and downstream production water is not affected.

Q5: Do the filter components of the equipment need to be replaced frequently?

A: Johnson wedge-shaped filter and metal woven mesh have high strength, wear resistance, and erosion resistance. They have a long service life under normal working conditions and generally do not require frequent replacement; Daily inspections focus on vulnerable parts such as seals and reducers, and regular maintenance and repair.

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