超声波增湿撞击流泡沫捕捉塔处理含铍废气研究

发布时间：2019-04-25 17:48

【摘要】：采用超声波雾化除尘技术,研制了最大处理风量为300 m3·h-1的超声波增湿撞击流泡沫捕捉塔含铍废气处理样机,按照国家标准方法对超声波增湿撞击流泡沫塔的进、出气口进行采样,使用电感耦合等离子谱仪对其除铍性能的影响因素进行了研究。结果表明,雾化加湿量的增加有利于除铍效率的提高,但同时也使净化后气体的绝对湿度增加;超声波加湿器安装在距离塔体3 m以上方能最大限度地提高除铍效率;当颗粒物粒径在0.4μm以上时,除铍效率较高,而在0.4μm以上时,除铍效率显著降低;除铍效率随进气口初始铍浓度而增加;气体流速的增加有利于提高除铍效率,但气体流速过高将导致净化后气体绝对湿度显著增加,最佳气体流速为12 m·s~(-1)。当气体流速为12 m·s~(-1)时,最佳塔内水位为40 cm。研究结果为超声波增湿撞击流泡沫捕捉塔在钍基熔盐堆(Thorium Molten Salt Reactor,TMSR)核能系统项目含铍废气上的应用提供了实验依据。
[Abstract]:By using ultrasonic atomization and dust removal technology, a prototype of ultrasonic humidifying impinging stream foam capture tower with maximum air volume of 300 m3 路h-1 was developed to treat the waste gas containing beryllium. According to the national standard method, the ultrasonic humidifying impinging stream foam tower was carried out. The influence factors of beryllium removal performance were studied by inductively coupled plasma spectrometer. The results show that the increase of atomization humidification is beneficial to the efficiency of beryllium removal, but it also increases the absolute humidity of gas after purification, and the maximum efficiency of beryllium removal can be achieved by the installation of ultrasonic humidifier over 3 m from the tower body. When the particle size is more than 0.4 渭 m, the efficiency of beryllium removal is higher than 0.4 渭 m, while when the particle size is above 0.4 渭 m, the efficiency of beryllium removal decreases significantly, and the efficiency of beryllium removal increases with the initial concentration of beryllium in inlet. The increase of gas flow rate is beneficial to improve the efficiency of beryllium removal, but too high gas velocity will lead to a significant increase in absolute humidity of gas after purification, and the optimum gas flow rate is 12 m 路s ~ (- 1). When the gas velocity is 12 m 路s ~ (- 1), the optimum water level in the tower is 40 cm.. The results provide an experimental basis for the application of ultrasonic hygroscopic impinging stream foam capture tower in (Thorium Molten Salt Reactor,TMSR (thorium-based molten salt reactor) nuclear energy system project with beryllium-containing waste gas.
【作者单位】：中国科学院上海应用物理研究所;
【基金】：中国科学院战略先导专项(No.XDA02020400)资助~~
【分类号】：TL426;TB559

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