water automatic backwashing filter

AR series multi-core backwash filter (AR filter for short) is a new type of self-cleaning filter with independent intellectual property rights of Shanghai Jiucheng Company. The AR filter integrates multiple slit-type filters. When the filter is clogged, it will be reversed. The flushing arm will back flush the filter group by group. As a high-quality self-cleaning filter, AR filter is specially designed for customers who take quality and reliability as an important consideration. It uses key components (such as filter screen, geared motor, self-cleaning control system, etc.) to be carefully designed.

The AR filter has outstanding advantages different from ordinary mesh self-cleaning filters. The 50-2000um filter adopts very sturdy and durable wedge-shaped filter elements, surface gaps, single-machine super large filtration area, low surface flow rate and fine filtration, single machine super large flow Up to 8000m3/h, it has high reliability and can handle the poorer water quality, such as sludge-like impurities, soft viscous impurities, higher impurity content, and a small amount of hair and fiber impurities.

The AR filter can filter out solid particles in various water and low-viscosity liquids (such as sea water, machined cooling water) to meet the requirements of system operation and downstream processes for liquid cleanliness, and can also be used to protect downstream key equipment Avoid particle blockage, abrasion or fouling, and improve the operating efficiency and life of key equipment. AR filter can automatically and continuously filter on-line, reducing downtime costs, maintenance costs and labor costs. It is a solution for water and aqueous liquid filtration.

Shanghai Jiucheng has a full range of automatic backwash filters, which are subdivided into AR300，AR400，AR500，AR600，AR700，AR800，AR900 and AR1000, a total of 8 sub-series are suitable for use in different precision and different flow conditions to meet the various filtering needs of customers.

Outline drawing and dimensions

Filtering process

The liquid flows in from the inlet of the filter, part of the liquid enters the filter directly from the lower end of the filter element, and the other part enters the top of the filter from the middle branch pipe, and then flows in from the top of the filter screen. The liquid flows in at the same time from the lower opening of the filter screen and passes through the filter screen. The inner surface converges and flows out at the outlet. The particulate impurities are intercepted on the inner surface of the filter screen and accumulate into a filter cake, which gradually increases the pressure difference between the inlet and outlet, indicating that the filter cake reaches its thickness, and the flux of the filter screen gradually decreases.

Backwashing process

When the set pressure difference or time is reached, the self-cleaning action starts, the decelerating motor drives the backwash rotating arm to aim at one or a group of filter screens, the upper end of the filter screen is sealed, the lower end is connected to the cleaning nozzle, and the backwash valve is opened. The filter screen is connected with the sewage pipe, and the pressure difference between the outside of the filter screen and the sewage outlet drives the filtered clear liquid to flow in the reverse direction to flush the filter cake on the inner surface of the filter screen and discharge it into the sewage pipe. After the backwashing of one filter element/group is completed, close the backwash valve, and aim the cleaning rotating arm at the next filter/group for backwashing. All filters are backwashed one by one/group.

Automatic cleaning control system

The deceleration motor drive shaft is equipped with a positioning plate and a cleaning rotating arm. Each positioning hole on the positioning plate corresponds to each filter screen. The cleaning rotating arm corresponds to one of the positioning holes. When the positioning hole reaches the sensing channel of the positioning sensor, The positioning sensor output signal causes the motor to stop rotating, the cleaning rotor has been aligned with a filter element, the backwash valve is opened and closed after a few seconds, the cleaning is completed, the motor continues to run, the positioning sensor is turned on again by the next positioning hole, and the motor stops and cleans The next filter element.   

1. Automatic continuous online filtering, uninterrupted flow during backwashing, reducing downtime and maintenance costs.

2. The filter screen filters the gaps, high-energy backwashing, high-strength structure, and the service life is more than 10 years.

3. Pulse backflushing, after aligning the filter screen, open the drain valve backflushing, backflushing has high intensity, high efficiency, short time-consuming, and water saving.

4. Water at both ends of the filter screen at the same time to increase the flux of the filter element, and the free surge of water can delay the surface blockage and avoid blockage at one end of the filter element.

• Applicable fields: Raw water treatment, water treatment system, refrigeration system, steel, papermaking, mining, petrochemical industry, precision metal manufacturing, municipal facilities, etc.

• Applicable liquid types: Ground water, sea water, lake water, reservoir water, circulating cooling water, chilled water, spray water, heat exchange water, sealing water, bearing cooling water, oil well water injection, process circulating water, machining coolant, cleaning water Wait.

Cases