The invention discloses an ultrasonic
backwashing filter device for
sewage treatment. The device comprises a filter
barrel, a
filter element, an ultrasonic oscillator, a water outlet, a top cover, a water inlet
pipe, an outer cover and a water outlet
pipe, wherein the
filter element is installed in the filter
barrel in a coaxial way; a base is installed at the bottom of the
filter element, and thetop of the filter element is installed in the filter
barrel by means of the top cover; the filter barrel is divided into two parts by means of the filter element, and the two parts comprise a sewagecavity positioned between the filter element and the filter barrel, and a
clean water cavity positioned in the filter element; the filter barrel is connected with the water inlet
pipe used for inputting
sewage into the filter barrel; the water inlet pipe is provided with an
electromagnetic valve of the water inlet pipe; a residue
discharge pipe is connected with the bottom position of the filter barrel. The ultrasonic
backwashing filter device has the beneficial effects that the ultrasonic oscillator works so as to send ultrasonic
waves into the filter barrel, and the high-frequency vibrationcauses the impurities to fall off from the outer surface of the filter element; furthermore, when the flushing water is input, the rotation of a cleaning rod can be driven, so that the filter elementcan be cleaned by means of bristles; due to the cooperation of the cleaning rod and the bristles, the impurities on the surface of the filter element can be conveniently and efficiently cleaned.