The invention discloses a catalyst extracting and screening device which comprises an extracting and removing
pipe, an inlet of the extracting and removing
pipe is communicated with catalyst equipment to be extracted and removed, an outlet of the extracting and removing
pipe is communicated with an inlet of a
cyclone separator, and an outlet of the
cyclone separator is sequentially communicated with an alkali sealing tank, a water sealing tank, a
vacuum pump and an emptying pipeline; the bottom of the
cyclone separator is communicated with a drum screen, an inclined screen plate is arranged in the drum screen, the side part of the drum screen above the high position of the screen plate is communicated with a coarse grain outlet pipe, and the bottom of the drum screen is sequentially communicated with a catalyst storage hopper and a fine material outlet pipe. According to the device, the pumped catalyst is screened by the drum screen, the screening process is time-saving and labor-saving, and after light impurities such as dust carried by the catalyst are absorbed by the alkali-sealed tank and the water-sealed tank, the residual gas impurities are discharged through the emptying pipeline communicated with the outlet of the
vacuum pump, so that the dust carried by the catalyst cannot pollute the environment; and the
vacuum pump inlet regulating valve, the pressure
transmitter and the vacuum pump are interlocked, so that intelligent
automatic control is realized.