Analysis Of Sludge Dewatering In The Process Of Sewage Treatment And Control

In recent years, along with the vigorous development of the sewage treatment in China, the rise of the penetration rate of the treatment of wastewater and advanced treatment, the sludge volume is also increasing. So the requirement of sludge dewatering is increasing day by day. After dehydration cake landfill, composting, incineration and other post-processing problem increasingly prominent in the position in urban sewage treatment, but high moisture content limit the application of these treatment methods. If through the sludge dewatering processing, make the sludge moisture content is reduced from 96% to 60% ~ 85%, and reduce the sludge volume to the original 1/5 ~ 1/10, can greatly reduce the difficulty of the subsequent sludge disposal. So is a key link in the early period of the sludge treatment of sludge dewatering, and improve sludge dewatering performance is a top priority.Horizontal screw centrifugal machine, is the state encourages the development of environmental protection industry equipment, mainly used in urban wastewater and domestic sewage of solid-liquid separation, harmless emissions, recycling and reuse of sewage, and the sludge is obtained by centrifugal dewatering machine can meet the requirements of environmental protection standard treatment. This paper around the sludge, the evaluation index of the water, the mud cake moisture content is low, the filtrate of high solid content to carry out the research, the factors that affecting the centrifuge for dehydration effect analysis.Centrifuge differential automatic adjustment, is an important factor in the centrifuge control system, this paper the automatic control device to do the main hardware selection, electrical connection, on the basis of control scheme, has carried on the analysis of the I/O points and the distribution, and the realization of the control logic.This article through to the centrifuge for dehydration of debugging, in combination with experimental data analysis of centrifugal machine parameter debugging, indicates that the factors affecting the centrifuge dewatering effect from strong to weak order of centrifuge control method is proposed. The experimental results prove that the centrifuge dehydration effect is improved, the moisture content of filter cake and filtrate solid content meet the requirements, and more stable.