Automatic Back flushing Filter

JX Filtration November 5, 2020 Automatic Backwash Filter

Automatic Back-flushing Filter is a new generation self-cleaning filtration system independently designed by TOP, it is integrated with a number of slotted filter elements. When the filter elements are clogged, a specially designed back-flushing arm will clean the elements one by one. As the high-end self-cleaning filter, it is especially designed for customers who take good quality and high eliability into consideration firstly .The TPF filter consists of world-class top quality crucial parts, such as filter element, gear motor, control system, etc..

Compared with ordinary mesh type self-cleaning filter, Automatic Back-flushing Filter has unparallel advantages. It has rigid and durable V-SLOT filter element, highly uniform slot width, large filter area in single filter, super high flowrate up to 3000m3/h in single filter, fine filtration at low surface flow velocity, high reliability. It applies to the filtration of dirty water containing oil sludge type impurities, soft and viscous impurities, high content impurities, small amount of hairs and fibers.

Automatic Back-flushing Filter, which filtration rating ranges from 50-2000 micron and its line size is available from 2’’ to 24’’. Filter has 3 sub-series: S series, as the large filter area filter, applies to high flowrate filtration or high precision filtration; M series, as the small filter area filter, applies to low flowrate filtration or rough grade filtration; T series are specially designed for super high flowrate at rough ratings.

Filter Structure and Main Parts

Main Parts: 1.Inlet 2.Outlet 3.Cleaning Arm 4.Gear Motor 5.Positioner 6.Filter Element 7.Cover Plate 8.Distribution Pipe 9.Cleaning Nozzle 10.Discharging Nozzle 11.Discharging Pipe 12.Cleaning Valve 13.Unfiltered Liquid 14.Filtrate 15.Actuator 16.Vent 17.Support Leg

Working Principle

【Filtering】 Liquid flows into the filter via the inlet, part of liquid flows directly through filter elements from the lower ends; another part of liquid flows through the distribution pipe and into the upper part of the filter and then flows into the filter elements from the upper and lower ends at the same time,and then flows through the internal surface of filter element and goes out from the outlet. Impurities are intercepted by the elements and the filter cake slowly accumulates, which leads to gradually pressure drop increasing between the inlet and outlet. It indicates that the filter cake reaches certain thickness,and the flux of filter element becomes lower.

【Back-flushing】 When the preset pressure drop or time exceeds, the self-cleaning program is triggered. The gear motor drives the cleaning arm to aim at one element to partly cap the upper end of the element and connect its lower end to the cleaning nozzle. And then the cleaning valve opens and connect the element and discharging pipe. the differential pressure between the element’s outside and discharging nozzle will make the filtrate back-flush the filter element, filter cake dislodged and be purged downward into the sewage pipe. After one element cleaned, the cleaning valve closes and the cleaning arm aims at the next one. When all filter elements cleaned, the entire back-flushing sequences are completed.

【Positioning】 Positioning disc and cleaning arm are installed on the shaft driven by the gear motor. Each positioning hole on the disc matches each element and cleaning arm are corresponding to one hole. When one hole reaches the channel of positioning sensor, the sensor output the signal to stop the gear motor. The cleaning arm has aimed at one element at the same time. The cleaning valve opens for several seconds till the element is cleaned. Then the gear motor continues rotating. When the next hole on disc reaches the sensor channel, the gear motor will stop and the next element is cleaned.

Technical Features and Advantages

Automatic continuous online filtration, uninterrupted flow during backwash, reducing the cost of halt and maintenance.large filtration area, low surface flow velocity, low pressure loss, fine filtration, low backwash frequency, saving backwash water adopted high-performance V-SLOT filter element, precise filtration slot, high-efficient backwash, high-intensity structure, over 10-year service life impulse backwash, opening the drain valve after aiming at the filter element, high-efficient backwash, well-working, time- and –water saving inflow from both ends of the filter element, increasing flux through; Free flux retarding surface block, avoiding sealing off one end of the element compact design, huge flux filtration with only one machine, significantly saving installation space and construction cost high integration, no need of large numbers of automatic valves, connectors, seals; high reliability, low operation and maintenance cost highly reliable automatic control system, easily operated interface to control the filters with high efficiency through actual working conditions.

Applicable Typical Industries and Liquids

■Applicable industries: Water treatment, steel, pulp and paper, mining, petro-chemical, machining, municipal, irrigation etc.

■Typical applicable liquids: Groundwater, seawater, lake, reservoir water, pond water, cooling water circulation, frozen water, high and low voltage gush to drench water, squirt water, heat water, seal water, bearing cooling water, oil wells note water, process of circulating water, machining coolant, cleaning agents, cleaning water, etc.

■Filtration function: Remove large particles, purify liquids, protect critical equipment

■Filtration type: Back-flushing filter, automatic continuously online filtration

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