Spin Flash Drying Technology In Applied Research Of The Atrazine Drying Process

Spin Flash Drying is forced mixing dispersed and fluidization efficient drying technology. In this paper, we used drying technique in the drying process of the pesticide Atrazine and have done much number of drying experiments in the large Spin Flash Drying plant production practice and the herbicide Atrazine dry product quality requirements. Moreover, we have improved the existing rotary flash the steam drying equipment and evaluated drying performance test.The impact factors of the final moisture content of the product have been investigated, such as hot air inlet temperature, stirring speed, the hot air flow, the charging rate of the Atrazine, the initial moisture content and other conditions. The relationships of the hot air inlet and outlet temperatures and dryer internal temperature field versus time have been measured in the hot air drying Atrazine powder process. The results show that the spin flash drying device can achieve fast drying Atrazine. The heat transfer coefficient of the constant drying stage increases with the entrance of hot air flow rate. Stirring speed on the heat transfer coefficient of the dryer is not very significant.Based on experimental data, we induce the regression of Atrazine in the spin flash dryer inside the relational as follows: Nu=10.4791-0.000294Re2.784-2.7741Re-1.404Bs-3.87The above equation can be used to improve the design of the existing Atrazine rotating flash drying device and has been proved to dry the Atrazine of Shandong Vicome-greenland Chemical Co., Ltd. For example, the improved dryer can enhance the capacity from about590Kg/h to860Kg/h, increase the nearly46percent of product, and can reduce the energy consumption30percent per unit of product each year to generate over200million in economic benefits.