Rotary drum vacuum filter for alkali-making filtration

The invention relates to the field of filtering devices, and discloses a rotary drum vacuum filter for alkali-making filtration. The rotary drum vacuum filter for alkali-making filtration comprises anouter box, a base is fixedly mounted at the bottom of the outer box, a control panel is fixedly mounted at the right side of the front surface of the outer box, a supporting plate is fixedly mountedat the top of the front surface of the outer box, a first motor is fixedly mounted at the top of the supporting plate, and two vertical plates are fixedly mounted at the front side and the back side of the top of the outer box respectively. The rotary drum vacuum filter for alkali-making filtration is provided with a sliding block, a fixed sleeve plate and a sleeve plate, a scraping plate scrapesa filter cake formed on the surface of a rotary drum, a distance between the scraping plate and the rotary drum can be changed by stretching the sliding block when the filter cake is not scraped off completely in order to chang