Suction filtration tank with outer layer jacket

The utility model discloses a suction filtration tank with an outer layer jacket, and relates to the technical field of suction filtration tanks. The suction filtration tank with the outer-layer jacket comprises a suction filtration tank body and an outer-layer jacket, the outer layer clamping shell is arranged on the outer side of the suction filtration tank in a sleeving manner; the heat preservation structure is arranged in the outer-layer clamping shell, a flange at the bottom of the suction filtration tank is communicated with a discharging pipeline, a valve is arranged on the discharging pipeline, a filter plate and filter cloth are arranged in the suction filtration tank, and a taking-out structure is arranged in the suction filtration tank. The device is easy to operate, the use temperature can be controlled through matched use of the annular heat preservation pipe, the liquid inlet pipe and the liquid outlet pipe, coated substances are prevented from being separated out, the coating passivation effec