Device and method for coagulating fine particles under tangentially circular cyclone atomization and sound wave action

Abstract

The invention discloses a device and a method for coagulating fine particles under tangentially circular cyclone atomization and sound wave action. The device comprises a double-layer cylinder; coagulation turbolators are distributed on the inner wall surface of the double-layer cylinder in an array manner; the coagulation turbolators distributed on the inner wall surface of the double-layer cylinder in an array manner form a cyclone coagulation area; a plurality of cyclone atomized sound wave turbulators are distributed on the inner wall surface of a flue gas inlet end of the double-layer cylinder in an array manner and tangentially circular manner; a section area formed by enclosing of the cyclone atomized sound wave turbulators form a high-pressure cyclone area; when entering the high-pressure cyclone area through a flue gas inlet, the dust-containing residual heat flue gas and wet saturated steam, generated by the cyclone atomized sound wave turbulators move and collide with each other along the tangentially circular direction under the sound wave action, and spirally move forward in a tangentially circular manner to enter a cyclone coagulation area, thus forming vortex flow after colliding with the coagulation turbolators; and the coagulation separation of the dust-containing residual heat flue gas fine particles can be realized under the mutual coupling action of sound wave, phase change and turbulence.

Description

technical field [0001] The invention relates to the technical field of removing gas-solid fine particles, in particular to a device and method for condensing fine particles through tangential swirl atomization and acoustic wave action. Background technique [0002] The fine particles contained in the exhaust gas emitted by industries and vehicles have seriously affected human health and polluted the atmospheric environment. Fine particles directly or indirectly carry toxic and harmful substances. Once they enter the internal tissues of the human body, they will cause serious harm to human physical and mental health. At the same time, fine particles can stay in the atmosphere for a long time and be transported over long distances. The visibility in scenic areas and scenic areas is reduced, and smog will also occur. Therefore, it is extremely important to remove fine particles in flue gas. [0003] The particle size distribution of the particles emitted after the combustion ...

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Problems solved by technology

[0005] Experiments and simulations at home and abroad have proved that sonic coagulation technology can effectively promote the coagulation of fine particles, and the effect of combining seed particles with larger particle sizes is better, but to obtain a better coagulation effect requires high acoustic intensity , some studies have shown that when the sound pressure level reaches 158dB or more, the fine particles can undergo obvious coagulation phenomenon, and the high sound wave intensity requires high energy consumption, and the noise hazards generated at the same time need to be eliminated

Phase change condensation is the use of supersaturated steam to undergo phase change condensation on the surface of fine particles to increase the size of fine particles. It is difficult to remove the particle size range of 3 μm to 5 μm or more, and the steam consumption required to achieve high supersaturation has become the difficulty of this technology; the turbulent condensation technology is simple and efficient, and has been widely used to control the emission of fine particles. Relying on turbulent coagulation technology to promote the growth of fine particles will cause a large pressure drop in the system and high energy consumption; the above methods of only strengthening the collision of fine particles and increasing the humidity of flue gas have obvious defects

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