Abstract:There are varying degrees of water, acid or oil mist pollution in the chemical, metallurgy, electroplating, textile, machinery manufacturing and building materials industries, thus demisting is an essential process. To overcome the low efficiency of cyclone demisters in remove particles smaller than 5 μm in diameter, this work establishes an electrostatic-cyclone demister with a diameter of 100 mm by combining an electrostatic demister with a cyclone demister. The effects of inlet velocity, voltage and droplet size on the mist removal performance are studied based on numerical simulations performed on the Fluent software platform and verified by a pressure drop test. Results show that the optimal inlet speed of the electrostatic-cyclone demister is 8~12 m·s?1, the optimal operating voltage is 60 kV, and the defogging efficiency is significantly higher than that of the ordinary cyclone demister, especially for mists smaller than 3 μm in diameter. Key words:swirl separation/ electrostatic defogging/ numerical simulation/ pressure drop.
图1静电-旋流除雾器结构 Figure1.Sketch of an electrostatic-cyclone demister
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1.School of mechanical engineering, Changzhou University, Changzhou 213000, China 2.Key Laboratory of Green Process Equipment in Jiangsu Province, Changzhou 213164, China Received Date: 2020-04-16 Accepted Date: 2020-10-02 Available Online: 2021-02-22 Keywords:swirl separation/ electrostatic defogging/ numerical simulation/ pressure drop Abstract:There are varying degrees of water, acid or oil mist pollution in the chemical, metallurgy, electroplating, textile, machinery manufacturing and building materials industries, thus demisting is an essential process. To overcome the low efficiency of cyclone demisters in remove particles smaller than 5 μm in diameter, this work establishes an electrostatic-cyclone demister with a diameter of 100 mm by combining an electrostatic demister with a cyclone demister. The effects of inlet velocity, voltage and droplet size on the mist removal performance are studied based on numerical simulations performed on the Fluent software platform and verified by a pressure drop test. Results show that the optimal inlet speed of the electrostatic-cyclone demister is 8~12 m·s?1, the optimal operating voltage is 60 kV, and the defogging efficiency is significantly higher than that of the ordinary cyclone demister, especially for mists smaller than 3 μm in diameter.