| 摘要 |
FIELD: technological processes. ^ SUBSTANCE: invention is related to automation of technological processes and may be used in automation of process of production of loose form of powdery choline chloride from its aqueous solution. In method that provides for use of crushed and fractionated dry sugar beet pulp as active adsorbent, its mixing with previously heated aqueous solution of choline chloride, and then drying in vibration dryer by superheated steam of atmospheric pressure, separation of spent superheated steam flow into the main one, sent to vibration dryer with creation of recirculation circuit, and additional one sent for reheating of choline chloride prior to its supply for mixing, the novelty is the fact that superheating of atmospheric pressure steam is done with heating steam, at that heating steam is produced by means of steam generator with electric heating elements, feed pump and safety valve, heating steam condensate produced in this process after superheating and condensate produced during heating of aqueous solution of choline chloride is taken to condensate collector, and then in mode of closed circuit is supplied in steam generator, at that flow rate of crushed and fractionated dry pulp is measured, as well as aqueous solution of choline chloride coming for mixing, flow rate and temperature of superheated steam upstream vibration dryer, choline chloride temperature before and after its heating, pressure of choline chloride after heating, temperature and humidity of mixture of crushed and fractionated dry pulp and aqueous solution of choline chloride prior to supply for drying, amplitude and frequency of oscillations in gas-distributing grid of vibration dryer, flow rate and humidity of powdery choline chloride after drying, level of condensate in steam generator and pressure of heating steam, at that flow arte of dry sugar beet pulp after fractionation is used to set flow rate of heated choline chloride coming for mixing, and flow rate and humidity of prepared mixture of crushed and fractionated dry pulp and aqueous solution of choline chloride prior to supply for drying, flow rate and humidity of powdery choline chloride after drying are used to determine amount of evaporated moisture in vibration dryer, which is used to establish flow rate of superheated steam in the main circuit of recirculation, and its temperature is established by current value of temperature of mixture of crushed and fractionated dry pulp and aqueous solution of choline chloride by setting of specified capacity of steam generator affecting power of electric heating elements, at that in case condensate level in steam generator falls below specified value, condensate is supplied from condensate collector, and when pressure of steam in steam generator reaches upper limit value, steam pressure is released through safety valve, if flow rate of mixture of crushed and fractionated dry pulp and aqueous solution of choline chloride deviates prior to supply for drying to the side of increase from specified value, at first frequency is increased, and then amplitude of oscillations in gas-distributing grid of vibration dryer, if flow rate of mixture of crushed and fractionated dry pulp and aqueous solution of choline chloride deviates to the side of reduction from specified value, at first frequency is reduced, and then amplitude of oscillations in gas-distributing grid of vibration dryer, current values of temperature and flow rate of choline chloride prior to heating are used to set flow rate of spent superheated steam in additional recirculation circuit, at that temperature of choline chloride after heating is used to set specified pressure of choline chloride at the inlet to mixer. ^ EFFECT: provides for increased quality of finished product, accuracy and reliability of control, increased yield of finished product, reduced specific heat and power inputs and prime cost of finished product. ^ 1 dwg |
