基于变频电场的电解吸垢水处理系统研究

发布时间：2018-05-18 08:01

本文选题：电场 + 电解　；参考：《山东科技大学》2017年硕士论文

【摘要】：在工业生产中,企业普遍将硬水作为循环冷却水系统的降温物料。循环水在使用过程中不断的浓缩,钙镁离子容易在管道和换热设备上结垢。水垢不仅影响换热设备的工作效率,而且容易腐蚀管壁,给企业带来了巨大的经济损失。本课题利用电解吸垢法,设计了一种电解吸垢水处理系统,来降低水质硬度,阻止循环水系统结垢。电解吸垢是一种主动除垢技术,给电极施加低压变频信号,形成变频电场作用于循环水中。经电解处理的水,其溶解性和渗透能力得到加强,把钙镁离子稳定在水溶液中,在电场力的作用下,钙镁离子在阴极区聚集,与碳酸根离子结合生成碳酸盐沉淀附着于阴极网上。从本质上解决循环水结垢问题,具有广泛的研究和应用价值。本课题主要完成了以下研究工作:1、介绍了电解法除垢方式的国内外发展现状,分析了电解吸垢水处理系统的工作机理。提出了电解吸垢系统的总体设计方案,电解吸垢水处理系统由上位机、主控电路和电解吸垢篮构成。2、介绍了系统硬件电路的设计,硬件电路包括变频信号产生电路、功率驱动电路、电流和电压检测电路、显示电路、CAN总线通信电路和可控电源电路。选用STM32F103RBT6作为微控制器芯片,产生频率为20Hz至30kHz的变频脉冲信号,可控电源电路电压输出范围为0至48V,通过不断检测吸垢篮电极工作电流调整工作电压,使得吸垢篮电极工作电流保持在6A左右。3、介绍了系统软件的设计,包括系统主程序的设计、变频信号产生程序设计、数据采集单元软件设计和系统通信模块软件设计,还有上位机系统设计。利用VC编写了上位机系统,通过CAN总线通讯方式,对电解吸垢系统进行远程操控,设定系统的初始参数,同时能够实时监控电解吸垢系统的工作状态。4、对电解吸垢系统进行调试与实验,记录水质的硬度、电导率、PH和结垢量等实验数据。经实验数据表明,该系统能够有效降低循环水的水质硬度和电导率,稳定水质的PH值,能够有效阻止循环冷却系统结垢。
[Abstract]:In industrial production, hard water is generally used as cooling material in circulating cooling water system. Circulating water is continuously concentrated during use. Calcium and magnesium ions scale easily on pipes and heat exchangers. Scale not only affects the working efficiency of heat exchanger, but also corrodes the pipe wall easily, which brings huge economic loss to enterprises. In this paper, an electrolytic scale absorbing water treatment system is designed to reduce the hardness of water quality and prevent the scaling in circulating water system. Electrolytic scale absorption is a kind of active scale removal technology, which exerts low voltage frequency conversion signal to the electrode and forms a frequency conversion electric field acting on the circulating water. The solubility and permeability of electrolytic treated water are enhanced, and calcium and magnesium ions are stabilized in aqueous solution. Under the action of electric field, calcium and magnesium ions gather in the cathode region. Carbonate precipitates formed by combining with carbonate ions are attached to the cathodic network. It has extensive research and application value to solve the scaling problem of circulating water essentially. This paper mainly completed the following research work: 1, introduced the development of electrolytic scale removal methods at home and abroad, and analyzed the working mechanism of electrolytic scale absorption water treatment system. The overall design scheme of electrolytic scale absorption system is put forward. The electrolytic scale absorbing water treatment system is composed of upper computer, main control circuit and electrolytic scale absorption basket. The design of the hardware circuit of the system is introduced. The hardware circuit includes frequency conversion signal generation circuit. Power drive circuit, current and voltage detection circuit, display circuit, can bus communication circuit and controllable power supply circuit. STM32F103RBT6 is used as microcontroller chip to produce frequency conversion pulse signal from 20Hz to 30kHz. The output voltage of controllable power supply circuit is 0 to 48 V. The working voltage is adjusted by continuously detecting the working current of the electrode. This paper introduces the design of the system software, including the design of the main program of the system, the program design of frequency conversion signal generation, the software design of the data acquisition unit and the software design of the communication module of the system. There is also a host computer system design. The upper computer system is programmed by VC, and the electrolysis scale absorption system is controlled remotely by CAN bus communication, and the initial parameters of the system are set. At the same time, it can monitor the working state of the electrolytic scale absorption system in real time, debug and test the electrolytic scale absorption system, and record the experimental data such as the hardness of water quality, conductivity, PH and scaling amount, etc. The experimental data show that the system can effectively reduce the hardness and conductivity of the circulating water, stabilize the PH value of the water quality, and effectively prevent the scaling of the circulating cooling system.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TQ085.4

【参考文献】