Patent ID: 11857897
Assignee: EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 5:
6. A gas cooling-scrubbing method, comprising the following steps:
(a) feeding a dusty gas into a cyclone jet scrubbing unit from a gaseous phase inlet, wherein the gas enters a jetting region of a cyclone jet scrubbing monopipe from a cyclone jet inlet, and is fully mixed with and cooled by scrubbing water sprayed from a nozzle in a contraction section, a mixing section and an diffuser section; wherein after solid particles are captured by atomized droplets to form a liquid-solid combinant, the combinant enters a cyclone region of the cyclone jet scrubbing monopipe through a tangential inlet; wherein the liquid-solid combinant sinks under an action of centrifugal force in a cyclone pipe and is discharged from a sedimentation outlet; and wherein the gas treated by cyclone jetting rises, is discharged from a cyclone jet pipe and enters a spray scrubbing unit;
(b) allowing the gas treated by cyclone jetting to enter a spray filtering pipe, wherein the spray filtering pipe is provided with a spray inlet, a spray port, and an internal filtering module located inside the spray filtering pipe between the spray inlet and spray port, wherein the gas enters the spray filtering pipe via the spray inlet in the spray scrubbing unit, wherein after the gas is further filtered by the internal filtering module, the gas is discharged upward from the spray port at a reduced rate; wherein high-pressure scrubbing water is sprayed downward from a scrubbing nozzle, and collides with the rising gas to further cool and scrub the gas; and wherein at the same time, tiny solid particles in the internal filtering module are detached from the internal filtering module by backwash of the high-pressure scrubbing water to increase a service life of the internal filtering module;
(c) allowing the gas treated by spray scrubbing in step (b) to enter a filtering spray unit, wherein a spray head disposed above a filtering bed sprays cooling-scrubbing water downward to further reinforce a cooling-scrubbing effect;
(d) allowing the gas treated by filtering spray in step (c) to enter a coalescing dehydration unit, wherein a coalescing bed captures tiny droplets in the gas to prevent the gas phase from entraining droplets into a downstream device, and the treated gas is discharged from a gas phase outlet.