A kind of liquid removal method and liquid remover of multi-stage cyclone gas

Abstract

A multi-stage cyclone liquid removal method and liquid remover, belonging to the field of gas-liquid separation technology, especially used for dehydration and liquid removal of flue gas discharged from wet flue gas desulfurization devices, including multi-stage cyclone, connecting cylinder, and exhaust cylinder . The multi-stage cyclone is composed of multi-stage cyclones connected in series up and down, and each stage of cyclone is composed of a cylinder body, a swirl part, and a liquid collection area. , In the centrifugal effective area, the liquid coalesced by the cyclones of each stage is led out in time, the gas enters the cyclone of the next stage, and finally enters the exhaust cylinder to be discharged.

Description

Technical field [0001] The invention belongs to the technical field of gas-liquid separation, and in particular relates to a multi-stage cyclone liquid removing method and a liquid removing device. Background technique [0002] The flue gas desulfurization mostly adopts the wet process. The so-called wet process uses an absorbent prepared into a slurry to wash the flue gas and remove the SO in the flue gas. 2 It is absorbed into the slurry and reacts with the absorbent. The core device is the absorption tower. Since most of the reaction of the absorption tower uses spray washing, the treated flue gas contains a large number of droplets. When the droplets are taken out of the absorption tower, the mist will be discharged from the chimney along with the flue gas and fall down around the chimney, forming "light rain", thereby polluting the environment. From the perspective of energy saving, a large amount of slurry is taken out, which is also a loss to the operation of the system, s...

AI Technical Summary

Problems solved by technology

The purpose of separation can only be achieved when the separation time of the droplets is less than the residence time of the gas in the swirl field. Increasing the length of the cylinder can increase the residence time of the fluid in the swirl field and improve the efficiency of liquid removal, but as the axial distance increases As the velocity increases, the hoop velocity gradually decreases, the separation power of the droplet becomes smaller and smaller, and the swirl effect is weakened; secondly, because the liquid is still in contact with the gas, the flowing gas will break up the liquid gathered in the wall area at any time, making the liquid In addition, due to the fluidity of the liquid, after the liquid coalesces into a larger volume along the wall, the gravity will naturally break the surface tension, forming small particles and returning to the gas. Therefore, even if the swirling flow scheme is used in the existing technology, since the liquid cannot be drawn out at any time, the separated liquid will be broken again under the action of the air flow, and become small droplets, which are re-involved in the smoke

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