List of Articles Scrubber

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  1 - Comparative Study of Efficiency using of Cyclone, Spray Scrubber and integrated system of cyclone- spray scrubber to collect Silica Particles in stone Crushing Workshops
  Mohsen Aliabadi Abdorrahman Bahrami Farideh Golbabae Farshid Ghorbani
  The purpose of this research is efficiency determination of conventional cyclone with spray scrubber for removal of silica in stone crushing factories in Azaandarian area at Hamadan state. The iso-kinetic sampling of total dust was obtained down stream and upstream of c More

  The purpose of this research is efficiency determination of conventional cyclone with spray scrubber for removal of silica in stone crushing factories in Azaandarian area at Hamadan state. The iso-kinetic sampling of total dust was obtained down stream and upstream of cyclone and scrubber in exhaust ventilation system base on EPA method No 5. The mass of all samples collected was determined by gravimetrically method. Also sampling of dust base of size distribution was performed by using of cascade centripetal.  The results of this study showed that using traditional cyclone with scrubber has significant efficiency to remove particles from the Local exhaust ventilation (LEV) system. The mean of outlet concentration from stack in stone crushing type 1 (rate of free silica more than 95%), was 43-131 mgm-3 and in stone crushing type2 (rate of free silica more than 85%), was 64-12.7 mgm-3 that is less than standard permissible limit recommended by Iran Environmental protection Agency. The efficiency of cyclone to treat dust particles from LEV system was 80-97 percent and increases to 92-99 percent when cyclone with spray scrubber was used and therefore this integrated system is the most efficient for collecting silica dust emission in the air of factories. Manuscript profile
• Open Access Article
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  2 - Acid vapor control in aluminum anodizing industry and designing a proper ventilation system
  Seyed Mostafa Khezri Nabiollah Mansuri Farideh Atabi Azadeh Sedghinia
  Parallel with man’s achievements in different aspects of technology, aluminum anodizing industry has improved a lot, but like other progressive industries, it has caused destructive effects on the environment, as well. In fact, aluminum anodizing industry is hazar More

  Parallel with man’s achievements in different aspects of technology, aluminum anodizing industry has improved a lot, but like other progressive industries, it has caused destructive effects on the environment, as well. In fact, aluminum anodizing industry is hazardous because it requires contact with sulfuric acid. The aim of the present study was to control sulfuric acid mist during the process of aluminum anodizing in a factory located in Alborz Industrial Estate. Following sampling, it was found that the concentration of sulfuric acid mists was 8 times higher than the standard level (standard level: 1mg/m3). In order to control the diffusion of sulfuric acid mist in the workshops and the areas where the workers breathe, a local ventilation system, based on the velocity-pressure method and according to the balancing of branches, was put into operation. The implemented hood was chosen based on the standards stated in the American Conference of Governmental Industrial Hygienists (ACGIH) guidelines. And the rate of required standard volumetric flow (scfm) for open-surface tanks was calculated to be equal to 1050 ft3/min for each hood. Consequently, based on the psychometric status of the studied workshop and the actual volumetric flow rate, the rate of required volumetric flow for each hood was considered to be 1239cfm. The whole system was divided into four independent ventilation units, two of which were equipped with 12 hoods (9 with unidirectional suction and 3 with bidirectional suction) and the others with 9 hoods (all with unidirectional suction). In order to resist against corrosion, steel 316 was selected as the constructing material of the canals, and in order to purify the exhaust air, following the necessary evaluations, mist eliminator scrubber system was selected. Also, to provide the required driving force, Back Ward centrifugal fan was considered. Manuscript profile