tailieunhanh - AIR POLLUTION CONTROL EQUIPMENT SELECTION GUIDE - CHAPTER 9

Dây tóc hoặc các loại lưới pad hấp thụ đã chứng minh mình rất hiệu quả trong việc hấp thụ các khí hoà tan trong nước. Khi xây dựng trong một bảng điều khiển phương tiện truyền thông đầy đủ dày đặc, họ có thể được sử dụng cho bộ sưu tập của các vi khuẩn và bào tử trong không khí. Các thiết bị này thường sử dụng các lớp lưới dệt hoặc lớp filamentaceous vào đó phun chất lỏng quản lý. Các chất khí gây ô nhiễm, hạt, hoặc vượt qua cả hai thông qua các lớp lưới. | chapter 9 Filament mesh pad scrubbers Device type Filament or mesh pad type absorbers have proven themselves very effective in the absorption of water-soluble gases. When constructed in a sufficiently dense media panel they can be used for the collection of airborne bacteria and spores. These devices typically use woven or layered filamentaceous mesh layers onto which a spray of liquid is administered. The contaminant gases particulate or both pass through these layers of mesh wherein the contaminant and liquid are brought into intimate contact thereby promoting gas absorption. Various vendors have developed proprietary designs of this generic type with hundreds of successful installations. Typical applications Filament and mesh pad type scrubbers are often used to collect inorganic acid vapor emissions from process reactors or storage tank vents. They are also used after particulate removal devices to enhance the absorption of gases. Laboratory hoods and point of use scrubbers often use wetted filament or mesh pad scrubbers. They are often used on large gas cleaning systems for example for acid concentration and capture. Figure shows a multistage wet scrubber on a superphosphate fertilizer plant for the recovery of fluosilicic acid. This system consists of a Venturi scrubber for particulate control a multistage wetted Kimre pad unit for stepwise acid gas concentration and a preformed spray scrubber for polishing the emission using pond water. The water flows upstream from the preformed spray scrubber to the filament type absorber. The fluosilicic acid is concentrated in three sprayed stages in the filament type scrubber which is housed in the rectangular box on the left ahead of the fan . The mesh pad type scrubber is shown in the foreground of Figure . 2002 by CRC Press LLC Figure Multiple stage superphosphate plant system Bionomic Industries Inc. . Figure Crossflow meshpad type scrubber Bionomic Industries Inc. . 2002 by CRC Press LLC Filament or