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Development of hybrid type of removal equipment for VOC(Volatile Organic Compound)by diffusion scrubber method

开发混合型扩散洗涤塔法VOC（挥发性有机化合物）去除装置

基本信息

批准号：
18310060
负责人：
TANAKA Shigeru
金额：
$ 11.28万
依托单位：
Keio University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

项目摘要

Recently, Volatile Organic Compounds (VOCs) emitted from building materials, adhesives, gasoline, automobile exhaust gas has become a serious problem as the air pollution and indoor air pollution.Removal and treatment equipment for VOCs (Volatile Organic Compounds) in the air was developed by diffusion scrubber method. The equipment consisted of parallel plate type of diffusion scrubber with ACF (Activated Carbon Fiber) sheet. It could remove VOCs by flowing in the polluted air into the narrow space between two parallel ACF sheets. "Diffusion scrubber method" which flows the polluted air the narrow space between parallel plates has small aeration resistance, compared with the conventional air cleaning method used by "filtration". Therefore, diffusion scrubber method can treat a large volume of the polluted air due to its small aeration resistance. The removal equipment consists of a simple structure which has set the basic unit of the two ACF sheets to 410 layers. Between the two ACF s … More heets, in order to pass air, the spacer is inserted and the space between the two ACF sheets is 0.07mm.VOCs gases (Benzene, Toluene, Ethylbenzene, p-Xylene, Trichloroethylene, Tetrachloroethylene) of 400-500ppbv was introduced into the removal equipment at the air flow rate of 600m^3/h. As results of evaluation experiments, it was found that the removal equipment could remove VOCs at more than 90% of removal efficiency. At the air flow rate of 1200m^3/h, the high removal efficiency of 80% for VOCs were also acquired. And then, it was found that the removal efficiency the removal equipment was agreed with the theoretical value calculated from Gormley-Kennedy equation.In this study, the diffusion scrubber method was also combined with the photo catalyst action of titanium oxide (TiO_2), and the removal equipment for HCHO was developed to achieve high removal efficiency and small energy consumption. In order to irradiate efficiently ultraviolet rays to TiO_2 coated surface, the wheel type diffusion scrubber was developed. the wheel type diffusion scrubber consists of 36 boards coated with TiO_2 and they are set radically at 10 interval around a black light as a source of ultraviolet rays. By covering with the Pyrex glass outside 36 boards coated with TiO_2, the wheel type diffusion scrubber can use sunlight as a source of ultraviolet rays from any direction. The removal experiment of HCHO was carried out in the field by using the wheel type diffusion scrubber. 80% of high removal efficiency for HCHO was maintained to near the sunset by introducing 0.7 ppm of HCHO at 50 m^3/h to the wheel type diffusion scrubber. Less

近年来，建筑材料、胶粘剂、汽油、汽车尾气等排放的挥发性有机化合物（VOCs）已成为严重的大气污染和室内空气污染问题，采用扩散洗涤器法开发了空气中VOCs（Volatile Organic Compounds）的去除处理设备。该设备由平行板式扩散洗涤器和ACF（活性碳纤维）板组成。它可以通过污染空气流入两个平行的ACF片之间的狭窄空间来去除VOCs。“扩散洗涤器法”使污染空气在平行板之间的狭窄空间流动，与传统的“过滤”空气净化方法相比，具有较小的通气阻力。因此，扩散洗涤器法由于其通气阻力小，可以处理大量的污染空气。去除设备由简单的结构组成，其将两个ACF片的基本单元设置为410层。在两个ACF之间 ...更多信息两片ACF片之间的间距为0.07 mm，空气流量为600 m^3/h，通入400- 500 ppbv的VOCs气体（苯、甲苯、乙苯、对二甲苯、三氯乙烯、四氯乙烯）。作为评价实验的结果，发现去除设备可以去除VOCs在90%以上的去除效率。在空气流量为1200 m^3/h时，VOCs的去除率也达到80%以上。本研究还将扩散洗涤法与二氧化钛（TiO_2）的光催化作用相结合，开发了一种高效、低能耗的甲醛去除装置。为了有效地对TiO_2涂层表面进行紫外光辐照，研制了轮式扩散洗涤器。一种轮式扩散洗涤器，由36块涂有TiO_2的板组成，它们以10 °的间距径向地设置在作为紫外线源的黑光灯周围。通过在36块涂有TiO_2的板的外面覆盖Pyrex玻璃，轮式扩散洗涤器可以从任何方向利用太阳光作为紫外线源。采用轮式扩散洗涤器进行了甲醛的现场去除试验。通过以50 m^3/h的速度向轮式扩散洗涤器中引入0.7 ppm的甲醛，可以将甲醛的高去除效率保持在80%左右。少