Study On The Flocculant Prepared And Added Automatically System

The flocculant has already been widely used in the slime water treatment of coal preparation plant. Compound the dry powderful flocculant into the solution of certain density, and add to the thickener rationally , on one hand can reduce turbid degree of the overflow water (as the circulating water), on the other hand can accelerate the sedimental speed of the slime , improve production efficiency. However, in the practical application, preparation and adding course of the flocculant is unsatisfactory. Solution compound evenly, adding too many or too few , will influence quality of precise coal and other coal product This subject had a deepen study to how flocculant solution added rational to the thickener.The preparation of the flocculant is prerequisite to realize its correct add. This article designed preparation systematic structure and selected hardware type on the basis of analysing conscientiously that flocculates drug nature. It will reach powder best dissolve state by a series of means as transport, heat, blow scattered, pre-dissolve, and make use of PLC programmable controller to realize the automation of working course.Adding science and rationally is goal to study flocculant adding automatically system. This article analysed and researched systematic measuring link, the adding model, the controlling mode and control strategy of addingautomatically system based on automatic control theory knowledge, carried on conceptual design to the adding system, and discussed the possibility of automatic adding.The adding system regards the slime water of the free district of the thickener as detecting target, sedimental speed as the feedback, form the close-circuit control system. It is proposed that use photosensitive sensor to realize sedimental speed measure. For prove photosensitive feasibility of component, recommend one for is it subside experimental provision and circuit of speed make up to measure, and has carried on certain experiment.The subject has gone on sedimental test of the slime water of a coal preparation plant. Introduce best choice scheme of flocculant, discuss sedimentation and characteristic capability of certain and different concentration, has studied and establishment adding regulation.According to the result of the test, put forward to a new idea that fuzzy control used in the slime water treatment, have studied the fuzzy control system (FC) based on PLC. The subject emulated to adding system of the flocculant using emulation software SIMULINK module of MATLAB, and indicate fuzzy control improve obviously the dynamic performance of the control system with traditional PID control compare .On the base of flocculant nature and rational application in coal slime water treatment, this text have studied further the preparation and adding automatically system of the flocculant, and has proved the advance and science of this system. There is very important reference value to the slime water treatment work of coal preparation plant in our country.