The invention belongs to the technical field of filtering equipment, and particularly relates to a
candle filter which comprises a filtering tank,
filter element pipes are arranged in the filtering tank and connected with a liquid collecting
pipe, a scraping plate is arranged on the inner wall of the filtering tank in a sliding mode, a plurality of cake scraping mechanisms are arranged on the scraping plate, each cake scraping mechanism is provided with a plurality of scraping plate holes, and the scraping plate holes correspond to the
filter element pipes in a one-to-one mode. The
diameter of the scraper hole is larger than the outer
diameter of the
filter element pipe, the filter element
pipe penetrates through the scraper hole, a scraper
assembly is arranged in the scraper hole, a first liquid inlet is formed in the bottom of the filtering tank, a second liquid inlet is formed in the upper end cover, and the first liquid inlet is connected with a
stock solution tank and a waste
liquid tank through a pipeline provided with a first
electric control valve; and the second liquid inlet is connected with the
stock solution tank and the waste
liquid tank through a pipeline provided with a second control valve. According to the
candle filter provided by the invention, the scraper
assembly can scrape off the outer wall of the
filter cake layer in the filtering process, so that the
filter cake layer is always in the optimal filtering effect range, the filtering effect is ensured, and meanwhile, the filtering efficiency is also improved.