Proceedings of the Thirty-second (2022) International Ocean and Polar Engineering Conference
Shanghai, China, June 5–10, 2022
Copyright © 2022 by the International Society of Offshore and Polar Engineers (ISOPE)
ISBN 978-1-880653-81-4; ISSN 1098-6189

www.isope.org

Research on monitoring and optimization of lake sediment construction parameters
Jiachen Zeng1, Yuchi Hao1*, Xiaowei Yan1, Runli Tao1, Wenbo Sun1
1CCCC National Engineering Research Center of Dredging Technology and Equipment Co., Ltd, Shanghai, PR China*Corresponding authorsludge deep dehydration has a water content of less than 40% and acapacity reduction of more than 60%. Many domestic scholars havecarried out research on the process parameter optimization of plate andframe filter press. Zhao Yan et al. (Zhao 2013) explored the effects offilter cloth type, sludge feeding time, reagent dosage, feed pressure andpurging on high-efficiency dehydration based on the test and analysis ofsludge system of catalyst sewage unit, which provided reliable technicalparameters for the transformation of pretreatment system of the unit. Ren
Wentao et al. (Ren, 2012) solved the important problem of solid-liquidseparation of coal slurry water by adding plate and frame pressure
filtration link on the basis of GPJ-120 pressure filter. The filtrate after
secondary treatment can be directly used as circulating water. Jia Teng
(Jia, 2018) improved and optimized the PLC control program ofbamzbl120 plate and frame filter press commonly used in concentrator,
and realized a series of functions such as automatic plate pulling,pressing plate, filtration, pressure maintaining, etc. At the same time, thestructure and feeding mode of plate and frame filter press are optimized,
which greatly improves the operation stability and dehydration effect of
the equipment. Throughout all similar reports, the research on theoptimization of process parameters of plate and frame filter press ismainly applied to sewage and slime water. There is no relevant researchon the optimization of process parameters of supporting control systems
related to large-scale river and lake bottom mud plate and frame filter
press dehydration treatment.

ABSTRACT
Diaphragm plate and frame filter press has the characteristics of goodstability and strong water resistance in the construction project of deepdehydration of river and lake sediment. In order to improve theintegration of equipment control and automatically control theproduction process, an automatic control system for plate and frame
dehydration process parameters is proposed in this paper. The system is
an important part of the intelligent management and control system forriver and lake sediment dehydration and drying. By analyzing andoptimizing the construction parameters of plate and frame pressure
filtration of river and lake sediment, this paper defines the time of theexpected dry basis of mud feed. For the abnormal construction
parameters encountered in the actual production, through the real-time
analysis of feed pressure and water output, a targeted improvement
scheme is proposed, which significantly improves the production
efficiency.

KEY WORDS: Plate and frame filter press, Process parameters,
Automatic control, Dehydration and drying
INTRODUCTION
With the rapid development of industry and agriculture and the processof urbanization, the river and lake sediment composed of clay, silt andminerals produces flocculent or honeycomb structural substances formedby sedimentation with the slow flow of water in lakes or rivers (Zhu2018). Its engineering composition is complex, diverse and contains acertain amount of pollutants. The mechanical dewatering method isapplicable to the dewatering treatment of river and lake sediment, which
has the characteristics of reducing the quality and volume of sludge, highdewatering rate and low water content of mud cake (Xu, 2016).
According to different types of machinery, mechanical dewatering
methods mainly include centrifugal separation dewatering method, belt
filter press, plate and frame filter press dewatering method, etc. (Zhang,1981).

When the integrated plate and frame dehydration process equipment wasused for deep dehydration of river and lake sediment, the production
parameters of the process equipment are often controlled according toexperience, the water content of mud cake changes greatly, which can
not meet the design requirements, and the output of single plate mud cakecan not reach the optimal output value. The linkage between processequipment was generally controlled through manual communication,
which has the problems of low degree of automation, multiple on-site
process coordination and heavy management workload. The plate andframe filter press was suitable for deep dewatering of sludge. The
framework of the automatic control system of process parameters
includes the automatic control system of plate and frame dewatering
process parameters and the design model of process parameters. The
process parameter control system is the basis for the realization of theprocess parameter design model, which is realized on the basis of theprocess parameter automatic control system (Ping, 2020).

The plate and frame filter press dehydrator has been gradually applied tomany industries. The research shows that (Chen 2019). The applicationof diaphragm plate and frame filter press in sludge treatment system and950