Department of Civil and Environmental Engineering, University of Ulsan, Ulsan, Korea.
J Air Waste Manag Assoc. 2013 May;63(5):499-506. doi: 10.1080/10962247.2012.738626.
A turbulent wet scrubber was designed and developed to scrub particulate matter (PM) at micrometer and submicrometer levels from the effluent gas stream of an industrial coal furnace. Experiments were conducted to estimate the particle removal efficiency of the turbulent scrubber with different gas flow rates and liquid heads above the nozzle. Particles larger than 1 microm were removed very efficiently, at nearly 100%, depending upon the flow rate, the concentration of the dust-laden air stream, and the water level in the reservoir Particles smaller than 1 microm were also removed to a greater extent at higher gas flow rates and for greater liquid heads. Pressure-drop studies were also carried out to estimate the energy consumed by the scrubber for the entire range of particle sizes distributed in the carrier gas. A maximum pressure drop of 217 mm H2O was observed for a liquid head of 36 cm and a gas flow rate of 7 m3/min. The number of transfer units (NTU) analysis for the efficiencies achieved by the turbulent scrubber over the range of particles also reveals that the contacting power achieved by the scrubber is better except for smaller particles. The turbulent scrubber is more competent for scrubbing particulate matter, in particular PM2.5, than other higher energy or conventional scrubbers, and is comparable to other wet scrubbers of its kind for the amount of energy spent.
The evaluation of the turbulent scrubber is done to add a novel scrubber in the list of wet scrubbers for industrial applications, yet simple in design, easy to operate, with better compactness, and with high efficiencies at lower energy consumption. Hence the turbulent scrubber can be used to combat particulate from industrial gaseous effluents and also has a scope to absorb gaseous pollutants if the gases are soluble in the medium used for particles capture.
设计并开发了一种紊流湿式洗涤器，以从工业燃煤炉的废气中去除微米和亚微米级的颗粒物（PM）。进行了实验以估计紊流洗涤器在不同气体流速和喷嘴上方的液体头条件下的颗粒去除效率。大于 1 微米的颗粒的去除效率非常高，接近 100％，这取决于流速、含尘气流的浓度和储液槽中的水位。较小的颗粒（小于 1 微米）在较高的气体流速和更大的液体头条件下也被去除了更大的程度。还进行了压降研究以估计洗涤器在载气中分布的整个粒径范围内消耗的能量。观察到最大压降为 217mmH2O，液体头为 36cm，气体流速为 7m3/min。紊流洗涤器在颗粒范围内实现的效率的传质单元数（NTU）分析也表明，洗涤器所实现的接触功率更好，除了较小的颗粒。与其他更高能量或传统的洗涤器相比，紊流洗涤器更适合用于去除颗粒物，特别是 PM2.5，而且在能量消耗方面与其他同类湿式洗涤器相当。
评估紊流洗涤器是为了在工业应用的湿洗涤器列表中添加一种新型洗涤器，该洗涤器设计简单，易于操作，具有更好的紧凑性，并且在较低的能量消耗下具有高效率。因此，紊流洗涤器可用于从工业气体排放物中去除颗粒物，如果气体可溶于用于捕获颗粒的介质中，它也具有吸收气态污染物的潜力。
