Study on the automatic dosing system of coal slurry based on photoelectric measurement
Deng Jianjun
Zhang Xiaozhu
Lin Zhe
Wang Chuanzhen
Gu Jiahuan
Wang Zhangguo
Abstract：In order to achieve automatic adding flocculant in the coal slurry processing,the equipment of coal slurry automatic dosing used in the laboratory was developed.The transfer function of the experimental equipment was obtained through a series of exploratory experiments,and the transfer function was simulated by the simulation software,and they were compared with the experimental results to determine the feasibility of the device.Results show that the settling velocity is 10-12 mm/s in different concentration of coal slurry under the best dosage condition.In the simulation,the settling velocity is stable at 10 mm/s when the agent reaches the optimal dosage.The experi mental results are basically consistent with the simulation results,and further,once the interference occurs,the system can automatically adjust and stabilize.The automatic dosing system has introduced the photoelectric measurement technology,which measures the settling velocity with the photoelectric sensor and has solved the lag problem of traditional automatic dosing system with the combination of feed forward and feedback control scheme.
Keywords：coal slurryautomatic dosing systemphoto electric technologysimulationcontrol strategy
Publication Date：2017-01-01