Mirror Polished Commercial Spray Dryer , Industrial Pilot Scale Spray Dryer

Overview

In general, according to the high speed centrifugal spray dryer exhaust tower exhaust form, it can be an exhaust air drying tower on the tower body, an exhaust drying tower in the lower part of the tower body, and a large curved pipe exhaust drying tower in the bottom of the tower cone. According to the powder collection form of the tower, it is divided into eccentric bag type dust removal, circumferential bag type dust removal, single (two) level cyclone dust removal, single stage bag type dust removal, cyclone bag type two-stage dust removal, cyclone bag wet type two-stage dust removal spray drying tower. . The eccentric bag type dust removing and the circumferential bag type dust removing drying tower are in the form of being connected with the tower body. At the same time, the drying tower can also be equipped with systems or equipment such as fine powder agglomeration, multi-jet agglomeration granulation, finished wind transmission and vibrating fluidized bed. In order to improve the safety of equipment operation, the explosion-proof door and the tower and the exhaust air temperature ultra-high temperature alarm device are installed in the tower body. Automatic control systems are available for demanding users. According to the drying characteristics, evaporation amount, heat source, etc. of different materials, the design conforms to the dry process of the product.

First, according to the direction of hot air and material movement, the lower exhaust tower is a downstream drying method, and the upper exhaust tower is a mixed flow drying change, which is the biggest difference between the two. Therefore, the superiority of the pressure type upper exhaust spray drying tower than the lower exhaust tower is:
1) Energy conservation: Since the return air chamber of the upper exhaust tower is the high negative pressure zone of the tower in the upper part, during the evaporation process, the high negative pressure evaporation reduces the evaporation temperature, and the temperature reduction saves the steam, saving the steam. energy. The upper exhaust tower evaporates 1kg of water, which only consumes 2.8-3.0kg of steam, saving 8-10% of steam;
2) Saving construction investment: The same type of equipment, the upper exhaust tower is 5~7m lower than the lower wind tower.
3) Good product quality: the particles of the upper exhaust tower powder are uniform, and the larger particles and smaller particles are less. Since the dry zone of the powder is a high negative pressure zone, the drying of the powder is low-temperature drying, so that the various vitamins in the powder are less damaged and the protein is not denatured. In addition, since the heating time of the powder in the drying process is relatively short in the high temperature zone relative to the lower exhaust tower, the color, the granularity and the brewing property are better.
4) Convenient cleaning: the tower body has a simple structure and is easy to manufacture. Since the column and the cone of the tower are directly connected, the connection of each angle is smooth and excessive, and there is no dead angle when cleaning. After opening the tower door, each part in contact with the dust can be conveniently cleaned.
5) Reduce the amount of sewage and save energy and reduce labor intensity: the annular wind curtain cannot be formed in the lower exhaust tower, the tower wall is heavily suspended, and the tower is brushed every day. The brush tower increases the loss of material and wastes a lot of hot water. Not only does it consume energy, it also increases the amount of sewage. The drying of the upper exhaust tower is mixed flow drying. The flow of the droplets is a downstream flow during the constant-speed drying period, and the deceleration period is a mixed-flow exhaust, and the wind reaches the bottom to form a 180-degree large revolution, so that the material and air in the drying are separated, and the wind is separated. In the rapid upward movement, a large annular air curtain is formed on the tower wall. When it is dry, an annular air curtain is formed in the tower to control the phenomenon of powder hanging on the tower wall. The tower can be cleaned for more than ten days, thus reducing the amount of sewage and saving. Energy, while reducing the labor intensity of workers.

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