Column Dust Scrubber Based on an Orifice Plate to Intensify Gas‐Liquid Mixing

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Abstract
A column dust scrubber based on the orifice plate is developed for small and medium‐sized enterprises in China, which are in urgent need of small‐volume, large‐flow scrubbers. It uses an orifice plate to evenly distribute the gas flow, which forms a uniform and stable impact on the liquid phase. As a result, the purpose of dust removal via intensified gas‐liquid mixting can be achieved. A laboratory orifice plate scrubber model with an inner diameter of 300 mm is developed, prototyped, and preliminary studied on the working process of the scrubber (mixed gas‐liquid flow pattern), liquid level, gas flow rate, pressure drop characteristics, dust removal efficiency, etc. The results show that the scrubber can achieve a good gas‐liquid mixing state when it is in a stable liquid column flow pattern. The drag coefficient of the scrubber is affected by the discharge of the gas stream to the liquid phase. As a result, the drag coefficient decreases as the gas flow rate increases, and the liquid level decreases. An optimum liquid level of this scrubber is in the range of ‐6~‐9 cm, the flow rate is in the range of 12.32~31.04 m3/min; the dust removal efficiency and pressure drop can reach 99.8~98.5% and 641.46~2621.49 Pa, respectively, under the above conditions. The capacity of gas per unit volume of the orifice plate scrubber is in the range 46.49~117.13 m3/(m3/min). The maximum capacity of gas per unit volume (117.13 m3/(m3/min)) is 3.44 and 1.84 times larger than those of the two existing state of the wet scrubbers.
Funding Information
  • Fundamental Research Funds for the Central Universities (2017QNA10)

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