Multi-column automatic backwash filter is mainly composed of shell, motor, reducer, differential pressure controller, PLC programmable controller, electric control box, valve, filter element, supporting parts, backwash arm, etc.Multiple filter cartridges are installed in one filter cartridge, which has a compact structure.The filtration process is the process of liquid flowing from the inside of the filter screen to the outside, and solid particles are trapped inside the filter screen. As the amount of contamination increases, the pressure differential between the dirty and clean sides of the filter gradually increases. When the pressure difference reaches the set value, the pressure difference gauge will send out a signal, and the self-cleaning filter will start the automatic backwashing process.
Operation and use of multi-column self-cleaning filter：
When the power of the filter electric control cabinet is turned on, the system enters into different working states according to the position of the manual/automatic selection switch. According to the actual needs of production, the filter system has the following two operating conditions：
1，Timing automatic self-cleaning
When the manual/automatic selection switch is turned to the automatic position, the filter starts according to the set time control
The automatic cleaning interval is 1 minute to one hour (set according to the actual debugging situation), open the drain valve, the time interval can be adjusted, and the opening time can be adjusted each time. The filter is automatically cleaned and a status signal is output. When the flushing set time is in place, close the sewage valve, and the cleaning work is over.
2，manual cleaning
When the manual/automatic selection switch is turned to the manual position, the manual cleaning state starts. Press the start button, the filter enters the manual cleaning state. Press the button to open the sewage valve to start sewage, and the system will enter the manual filtration state after completion. The manual cleaning time is determined according to the condition of the filtrate, and the pressure difference returns to normal after cleaning. Press the stop button of the sewage valve to end the manual cleaning.
