| The belt filter press is perfect equipment used in dewatering the sludge. With the advantage of simple structure,convenient operation,low cost of energy,low noise,big treatment and continuous operation,it has been developing very quickly. It is applied to the field of food,chemistry,papermaking and sludge dewatering. Its advantages in the environmental protection have been realized,and so it has a bright future. Its main principle is dewatering by use of chemical treatment and mechanical extrusion.There are many factors to influence the dewatering effect,including property of the sludge,effect of chemical treatment,selection and cleanness of the belt and the structural design of the extrusion section. Among them,the vital factor is the structural design. In conventional design,we depend on experience,and short of the analysis to the extrusion section. So we need a modern way to structural design to get a better effect of dewatering. The essay is based on analyzing the principles,building a new math model,giving some advice to current equipment.This essay is divided into 6 chapters. The first one is exordium. The second chapter is to introduce squeeze and filter theory. The third chapter introduces the water in sludge and the way to get rid. The fourth chapter is about the working principle of the belt filter press. The fifthchapter is the design of new two-dimensions model of squeezing. The sixth chapter talks about the applying of the new model. At the end of the essay are my conclusions. |
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