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The general principle and selection of mixing and batching tank equipment. The structural principle and selection of mixing tanks and vacuum mixing tanks include mixing tanks, vacuum mixing tanks, and stainless steel mixing tanks. Widely used for liquid-liquid and liquid-solid mixing in dairy, pharmaceutical, chemical and other industries, achieving stirring effect and meeting technical requirements as qualified products. The mixing tank includes the tank body and various accessories welded to the mixing tank. The commonly used box for stirring kettles is a vertical cylindrical container. It has a top cover, a cylinder block, and a tank bottom. The tank body is installed on the foundation or platform through a bracket. The space provided by the batching tank for the mixing process at the specified operating temperature and pressure. In order to meet different process requirements or due to the structural needs of the tank itself, various accessories for different purposes are installed inside the tank. For example, due to the material often accompanied by thermal effects during the reaction process to provide or remove reaction heat, a set of water tanks or coils are installed in the tank space. In order to connect the reducer and shaft seal, the top cover needs to be welded to the base. Manholes, handholes, and various nozzles are required to facilitate the repair and arrangement of internal components.
In order to monitor and control the temperature, pressure and height of materials during operation, thermometers, pressure gauges, Level sensor, reflectors and discharge devices should be installed. Sometimes, in order to change the flow mode of materials, increase stirring intensity, enhance mass and heat transfer, and weld baffles and guide pipes inside the tank. However, with the increase in the number of spare parts, it often brings a lot of trouble to the manufacturing and maintenance of equipment, increasing the cost of equipment manufacturing and maintenance. Therefore, when determining the structure of the mixing tank, comprehensive consideration should be taken to ensure that the equipment meets the production process requirements, achieves economic rationality, and achieves optimal design.
The key points of mixing tank design are as follows: tank length to diameter ratio and bearing capacity. In order to understand the volume of materials in the mixer, appropriate length to diameter ratio (H/D) and bearing capacity should be selected to determine the diameter and height of the cylinder. The length and diameter of the stirring tank are more important than the reaction requirements of the stirring tank, which involve the requirements of stirring efficiency, effectiveness, and process. The mixing tank mainly consists of three aspects: mixing tank 1, hybrid power, mixing tank 2, buffer pad, mixing tank 3, and the mixing reaction characteristics of the material itself. The design of the mixing container should reasonably select the loading amount, loading coefficient, and mixing method to maximize the utilization rate of the equipment. The commonly used loading coefficients are 0.6-0.85. If the material needs foam or boiling during reaction, it needs 0.6 to 0.7. If the material response is relatively stable, it is 0.8-0.85 (with high material viscosity).