Tubular Automatic Backwash Filter

‌Working principle

The working principle of the tubular automatic backwashing filter includes two modes of internal backwashing and external backwashing:

Internal backwash:


The filtered raw material is used as backwashing medium. When the control system receives the backwash signal, close the inlet valve of a filter unit and open the blowdown valve.

Under the action of its own pressure, the filtrate flows in reverse, washes the solid particles accumulated on the outer surface of the filter element, and drains into the dirty oil pipe.

After backwashing, close the drain valve, open the raw material inlet valve, resume the filtration of the filter unit, enter the next unit for backwashing, until all filter units have completed backwashing.

External backwash:

Using other gases as backwashing medium, pressurized backwashing of liquid in tank is carried out. When the backwash signal is received, close the raw material liquid inlet and outlet valves of the filter unit, and open the backwash medium inlet valve and blowdown valve.


Driven by gas pressure, the filtrate flows in reverse to flush the solid particles and discharge them into the dirty oil pipe.

After backwashing, close the backwashing medium inlet valve and blowdown valve, resume the filtration of the filter unit, and enter the next unit for backwashing.






Product characteristics

Intelligent control: PLC full intelligent control, to achieve long-term online filtration.


Efficient filtration: The filter consists of multiple filtration units that can be customized according to process characteristics such as flow rate, velocity, viscosity, etc.

Various filter options: metal sintered filter, wedge filter, wire mesh filter, polypropylene filter and ceramic filter.

Differential pressure control: The system adopts differential pressure priority control to ensure that the filter works in the best condition.


Flexible application: Suitable for different media and process requirements, to ensure efficient and stable filtration effect.




Application field

Tubular automatic backwash filters are widely used in the following industries:

Hydrofining

Hydrocracking

Field reinjection water filtration

Clean coal gasification steam condensate water filtration


Coalbed gas filtration

Naphtha and coal tar filtration

Liquid chlorosilane removal of silica powder filtration

Petrification


Medicine

New energy and other industries