Study On The Flocculent Prepared Automatically System By PLC

With the increasing enhance of closed water circuit for coal preparation plant and environmental protection requirement, making use of flocculants are absolutely necessarily a sort of auxiliary measure in slime water treatment. And then it's necessary to select the apparatus used for melting and adding flocculent. Since domestic dispensing and adding facility is just in the stage of development now, as against import equipment is dearly; at present internal majority coal separating plants depend on manual melting and adding agent. Accordingly, it's essential to study and develop the prepared and added flocculants automatically device based on our country actual conditions of coal slime water treatment.Based on the analysis and study of the prepared flocculent system at home and abroad, this paper analyzes the property of flocculation agent earnestly. It breaking through immanent model of thinking and brings forward confecting the flocculent solutions capitalized on high-speed swirling flow caused by cyclone. In this article, the structural composition and the design of hard and soft wares of the system is presented. Making use of heat preservation, decentralization and pre-dissolution used by the cyclone mixer, etc a series of means, which make powders reach the optimum dissolved state. The design carry out automation of working process capitalized on PLC controlling system.The method of compounding flocculent solutions is a novel design approach applied by the cyclone mixer. According to datum collected, there are absences of research report about this area, and there are lacks of bought experience to absorb in. Firstly, the paper demonstrates the feasibility of confecting the flocculent solutions used by the cyclone mixer in the abstract. Secondly, through experimental verification such a measure is advisable. Compared to conventional method of preparation, it abbreviates complete dissolving time needed of flocculent. Based on above works, by making use of the orthogonal experiments it optimizes the configuration parameters and operational parameters of the cyclone mixer, and then contrives and makes out the optimum cyclone mixer. For two flocculent solutions acquired by two methods applied in the same concentration slime water carry through sedimentation experiments respectively. These experimental results state that the effect of the liquor prepared by the cyclone mixers is superior to the effect of the liquor prepared by conventional method.Moreover, optimization designs of dissolving and agitating installation are done in the paper. Avoiding deposition and agglomeration of flocculent particles in the corner of dissolving case, it is contrived of cylindrical configuration. And then four blocks of vertical baffles are collocated uniformly in box in order to improve fluid circulation and enhance the effect of water mixed with dry -flocculent.For vibration and deflection caused easily by stirring shafts and agitating blades during mixing this paper determines the critical speed calculation of agitating shaft and verifies intensity of agitating palm by means of computation model and mathematics deduction based on being analyzed seriously. In the paper double structure silo of heating, thermal insulation function is designed so as to solve the matter of dry -flocculent easily affected with damp. And by analyzing and accounting design and model selection of other main equipments are given. In the software and hardware designation of automatic control system part are given selected type of PLC, electricity elementary diagram, the peripheral interconnection diagram of PLC and its extensive module, program ladder diagram, and so on.