The invention relates to printing filtering equipment with an automatic
backwashing and recycling function, which is applied to the field of filtering, two corresponding
servo motors are started to enable a lead screw to rotate to drive a movable scraping plate to fall off to scrape off blockages, the blockages are concentrated at the lower part of a
filter element, the content of the blockages in a blow-off
pipe is high, and when the movable scraping plate falls off, the movable scraping plate does not fall off. Compared with the prior art, the method has the advantages that the consumption of
backwashing water is reduced, the
pollution discharge smoothness is improved, the electromagnetic
lantern ring is closed when it is detected that the
pressure difference value reaches the threshold value for the first time and the
filter element is located below the
filter element, and the electromagnetic
lantern ring is closed. Waste water is flushed upwards, so that the scrapers move upwards to scrape blockages and accumulate the blockages in a fence space, the filtering time of the filter element is prolonged, when the
pressure difference reaches a threshold value again, the
servo motor is started to continue back flushing, meanwhile, the
electromagnetic valve and the discharging
pipe are opened, the blockages on the scrapers are discharged, and the back flushing frequency and water resource waste are reduced.