Studies On The Anti-icing Transformation Of The Circulating Water Cooling Tower And The Water System Optimization Operation In Jihua Petrochemical Co. Fine Chemicals Plant

Circulating water of chemical production device is one of the key factors ofsecurity, stability, long, full load operation and quality. Jilin Petrochemical Co. finechemicals plant utilizes open circulating water system. With the influence of operationtime and the northeast cold weather, the present system exist a series of problems, forinstance, at the inlet of circulating cooling water system appear the serious freezingphenomenon in winter, which have caused blocking the column pipe of heatexchanger; total iron content and turbidity index fluctuate; The concentration ratio ofcirculating water reduce，the column pipes of the heat exchanger become seriousscaling and pitting perforation; the circulating water replenish too much as well as thissystem consume the higher energy. With the continuous development of the JilinPetrochemical Co., the higher standard is required for all basic units of circulatingwater operation and management assessment, and the previous management andoperation schemes have been unable to meet the demands of the development of theenterprise.We have collected and analyzed the circulating water operation data for manyyears, and investigated the basic units of Jilin chemical Co.. Based on the analysis ofthe above data, the present system condition and the detailed communication with theequipment manufacturers, it was considered that three main factors can restrict thesystem operation:The first is that the serious winter freezing at air inlet of circulating water coolingtower have caused damage to concrete structure and packing, which affect the safeand stable operation of production equipment. The second is that the pharmaceuticalformulations of the current circulating water show no significant effects on extendingthe maintenance cycle, and reducing the corrosion. The third is that the operation ofcirculating water system can not match the current device production load, existingbig car Mara phenomenon and consuming too much energy.In this paper, the present condition of the fine chemicals plant of Jilin Petrochemical Co. circulating water system and the existing problems were analyzedcarefuly, and comprehensively optimized bottleneck problem of circulating watersystem. With considering the relation of circulating water cooling tower runningsmoothly in winter and stable production, improving pharmaceutical formulations andequipment using cycle, put forward a set of effective management scheme, which canextend equipment life cycle and reduce power consumption, increase savings forenterprises.The main work in this paper is as follows:1. The reason for circulating water cooling tower freezing in winter are analyzed.By adding a water guiding plate, reforming cooling tower water distribution systemand the use of polyurethane foam material to prevent the water guide plate near thedead corner from freezing, the icing problem of cooling tower was solved.2. We investigated pharmaceutical use of the other basic units in JilinPetrochemical Co., and compared the cost, operating effect and service, of thedifferent agents. Furthermore, the backwashing operation was discussed. On the basisof the above study, put forward some feasible suggestions for changing the circulatingwater.3. Considering consumption energy too high for the circulating water, thecirculating water operation data from other units in Jilin petrochemical Co. and eachdevice in fine chemicals plant were compared. During the short-term and long-termstop running, the valve opening degree of heat exchanger circulating water wasstudied. We proposed the optimal operation scheme and achieved significant benefitsthrough the implementation of application.