Spraying dryer atomization process and internal structure spray dryer is a form of drying in the field of drying, and it is suitable for the production of liquid materials such as solutions, emulsions and pumpable suspensions. Powdered, granulated or lumpy solid product. The different drying characteristics of heat-sensitive materials, viscosity, fluidity, etc., and the different grain quality, particle size distribution, residual moisture content, bulk density, particle shape, etc., determine the use of different atomizers, airflow. The mode of movement and the structure of the drying chamber.

The ball-milled slurry is further stirred uniformly in the agitation tank and heated to above 35 ° C, and then a pressure is applied to the agitation tank. Under the action of the pressure, the slurry is sent to the atomizer, and the atomizer is fogged. After being injected, it is sprayed into the tower body from the lower part of the tower body. The N2 heated by the oil and gas heat exchanger is sent to the gas distributor at the top of the tower body by the blower. After passing through the gas distributor, N2 enters the tower body uniformly and in a whirlwind manner, and the atomized slurry is dried and granulated. After contact with the hot gas, the liquid on the surface of the pellet rapidly evaporates, and the internal gas migrates to the surface during the subsequent drying process and is carried away by the hot gas. The dried pellets fall to the bottom of the tower and are gap-collected through a pair of disc valves.

The spray dryer is a thermal process in which a liquid material is atomized into a fine mist droplet through a nozzle, brought into contact with a heat medium in a drying tower, and dried to become a powder. The feed can be a solution, a suspension or a paste. The atomization can be achieved by a rotary atomizer, a pressure atomizing nozzle and a gas flow atomizing nozzle. The operating conditions and drying equipment can be designed according to the desired drying of the product. Characteristics and specifications of the powder. The spray dryer spray, drying and collection system is made of transparent high-quality borosilicate heat-resistant glass material, allowing the drying process to be carried out in a non-polluting environment. Built-in imported oil-free air compressor, the diameter of the powder spray is normally distributed, the fluidity is very good, the noise is very low, less than 60db. The atomization structure of the two-fluid spray is made of high-quality stainless steel and has a compact design and no auxiliary equipment. A nozzle cleaner (through needle) is provided, which is automatically cleared when the nozzle is blocked, and the frequency of the needle can be automatically adjusted.

The gas after drying the slurry contains vaporized hexane and a small amount of fine dust, which is first sent to the cyclone by the pressure fan, and the dust is initially separated, and then sent to the condensation and elution tower. In the leaching tower, the gas is sufficiently washed, and the hexane gas contained in the gas is condensed and collected at the bottom of the rinsing tower, and the washed gas is sent to the oil-gas heat exchanger for heating. Get reused. The system maintains a micro-positive pressure during operation and is automatically controlled by a gas supply valve and an exhaust valve. The disadvantages of the hot air vortex and the axial flow are avoided, and a hot air rectifying chamber is arranged. The air outlet of the rectifying chamber is provided with a fixed vane like a rotary vane guiding impeller, and the hot air flows out from the radial direction of the fixed vane to further change the hot air direction. , blowing to the drying tower. In this way, the hot air of the vortex is converted into the axial supply of the drying tower by the fixed blade, and the purpose of rectification is achieved, and the effect of solving the problem of product adhesion in the drying tower is very obvious. Moreover, the rectification prevents the hot air from rotating, so that when the mist is lowered, the heat is evenly distributed, so that the thermal change of the finished product can be maintained within a small limit, thereby improving the quality of the finished product.

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