A negative pressure vacuum
system for filtering
solid particles and a liquid comprises a first dust coarse
filtration tank, a second dust coarse
filtration tank, a first tee, a second tee, a vacuum tank, a first
vacuum pump and a second
vacuum pump, a gas inlet pipeline and a gas outlet pipeline are led out from the tank chamber of the vacuum tank, the first port of the first tee is communicated with the first gas outlet of the first dust coarse
filtration tank, the second port of the first tee is communicated with the second gas outlet of the second dust coarse filtration tank, the third portof the first tee is communicated with the gas inlet pipeline of the vacuum tank, the first port of the second tee is communicated with the first gas inlet of the first dust coarse filtration tank, the second port of the second dust coarse filtration tank is communicated with the second gas inlet of the second dust coarse filtration tank, the third port of the second tee is externally connected with a user's vacuum use port, the pump ports of the first
vacuum pump and the second vacuum pump are communicated with the gas outlet pipeline of the vacuum tank, the first vacuum pump is connected with the first vacuum filter and a first vacuum pump valve, and the second vacuum pump is connected with the second vacuum filter and a second vacuum pump valve. The
system has the advantages of convenience in pipeline control, effectiveness in filtering
dust particles,
prolongation of the life of filter elements, improved
system stability, high production efficiency and low cost.