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AIR POLLUTION CONTROL EQUIPMENT SELECTION GUIDE - CHAPTER 4

Khô, tách xoáy buông tha bụi bị cuốn theo một dòng khí mang theo. Thường được gọi là cơn bão thu gom, multicyclones, lốc xoáy, tách xoáy, người thu gom bụi xoáy. Điển hình ứng dụng và sử dụng Thu Cyclone được sử dụng cho thu hồi sản phẩm của bụi khô và bột và như thu ban đầu về tải bụi cao (hơn 2 đến 5 GRS / dscf) các ứng dụng kiểm soát ô nhiễm không khí. Một ứng dụng phổ biến là các máy sấy quay. Được sử dụng để làm mất nước các sản phẩm khác nhau từ. | chapter 4 Dry cyclone collectors Device type Dry cyclonic separators disengage entrained dust from a carrying gas stream. Often called cyclone collectors multicyclones cyclones cyclonic separators cyclonic dust collectors. Typical applications and uses Cyclone collectors are used for product recovery of dry dusts and powders and as primary collectors on high dust loading more than 2 to 5 grs dscf air pollution control applications. A common application is the rotary dryer. Used to dehydrate various products from grain to manure direct or indirect fired rotary dryers often use cyclone collectors to capture the entrained dust prior to a secondary collector such as a Venturi scrubber . The rotating action of the dryer entrains a portion of the product as the product tumbles through the hot drying air. This product is often valuable in dry form so the cyclone is used to disengage the dust from the gas stream and be recovered. The residual dust is air-conveyed to the downstream device. Figure 4.1 shows a large diameter cyclone collector attached to a gas-fired rotary dryer for agricultural product recovery. The cyclone is the large white vessel in the center of the photograph. Another application is on woodwaste or bagasse sugar cane boilers where light entrained ash can be collected in suitably designed cyclones. On woodwaste applications smaller diameter cyclones are often used in banks where each cyclone handles less than 1000 acfm of flue gas. These are called multiple cyclone collectors. One of the most common uses of cyclones is to protect fans from abrasive dusts. Many dust-producing process applications operate under induced draft. Placing a well-designed cyclone collector ahead of the fan helps protect the latter from abrasive wear and improves the operating life of the fan. If the cyclone alone cannot meet emissions guidelines another type device may be used after the fan. 2002 by CRC Press LLC Figure 4.1 Rotary dryer and cyclone Duske Engineering Co. Inc. . .