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The boiling dryer air distribution plate two roles and airflow distribution analysis
Boiling dryer in the air distribution plate has two roles, one support material layer, the second is that the gas distribution uniformity. Distribution plate aperture size, shape, distribution, trend, opening rate and so plays a vital impact on the distribution of fluid. Uneven distribution of gas, the bed will appear in the "circulation", it tends to extremely easy to make certain parts of "channeling" in the bed, while the remaining parts are dead bed, when most of the gas down the bed some channels in the form of "channeling" short circuit through the departure of the bed, the gas-solid contact much worse, it should strive to avoid. Good distribution plate design, the bed should be able to inhibit uneven, i.e., when some parts of the bed due to pressure drop reduces, the air velocity is increased, the resistance generated by the distributor plate should be able to inhibit the increase of the air flow, thereby suppressing fluidizing the deterioration.
  Currently most of boiling dryer air distribution plate form a single, multi-vertical perforated plate or seats shaped stencil material flow process is prone to uneven fluidization or produce dead ends, can not ensure that the particles The uniformity of the drugs, while the form of a single opening can not meet the production process requirements of the different drugs.
  On the other hand, in order to reduce drug leakage material loss, commonly used by the multi-layer network structure, air distribution plate and fluidized bed bolted the use of a large number of demolition inconvenient, is not easy to clean and produce residues cause cross-contamination. Recommendation: use of a computer model of fluid dynamics, heat and mass transfer model, Pitch, pore size, porosity, and other parameters in the design of air distribution plate aerodynamics, thermodynamics simulation and validate different materials to meet production process requirements.
  Removable installation, the connection is made to ensure the realization of the quick and thorough and complete cleaning.
  Boiling dryer type of equipment operating parameters generally set the operator's experience, but it can achieve the intelligent, the process parameters can also be achieved retrospectively, which of the boiling dryer class equipment electrical control system proposed the higher requirements. In the electrical control system, it is necessary to detect temperature, humidity, pressure, differential pressure, the wind speed, the operation time, dust concentration and a series of devices and to obtain basic data, and then transport and storage by the transmitter to the touch screen by the touch screen of the data storage analysis, and then to develop a suitable process route to achieve intelligent control.
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