本文選題：電場 + 電解　； 參考：《山東科技大學(xué)》2017年碩士論文

【摘要】：在工業(yè)生產(chǎn)中,企業(yè)普遍將硬水作為循環(huán)冷卻水系統(tǒng)的降溫物料。循環(huán)水在使用過程中不斷的濃縮,鈣鎂離子容易在管道和換熱設(shè)備上結(jié)垢。水垢不僅影響換熱設(shè)備的工作效率,而且容易腐蝕管壁,給企業(yè)帶來了巨大的經(jīng)濟損失。本課題利用電解吸垢法,設(shè)計了一種電解吸垢水處理系統(tǒng),來降低水質(zhì)硬度,阻止循環(huán)水系統(tǒng)結(jié)垢。電解吸垢是一種主動除垢技術(shù),給電極施加低壓變頻信號,形成變頻電場作用于循環(huán)水中。經(jīng)電解處理的水,其溶解性和滲透能力得到加強,把鈣鎂離子穩(wěn)定在水溶液中,在電場力的作用下,鈣鎂離子在陰極區(qū)聚集,與碳酸根離子結(jié)合生成碳酸鹽沉淀附著于陰極網(wǎng)上。從本質(zhì)上解決循環(huán)水結(jié)垢問題,具有廣泛的研究和應(yīng)用價值。本課題主要完成了以下研究工作:1、介紹了電解法除垢方式的國內(nèi)外發(fā)展現(xiàn)狀,分析了電解吸垢水處理系統(tǒng)的工作機理。提出了電解吸垢系統(tǒng)的總體設(shè)計方案,電解吸垢水處理系統(tǒng)由上位機、主控電路和電解吸垢籃構(gòu)成。2、介紹了系統(tǒng)硬件電路的設(shè)計,硬件電路包括變頻信號產(chǎn)生電路、功率驅(qū)動電路、電流和電壓檢測電路、顯示電路、CAN總線通信電路和可控電源電路。選用STM32F103RBT6作為微控制器芯片,產(chǎn)生頻率為20Hz至30kHz的變頻脈沖信號,可控電源電路電壓輸出范圍為0至48V,通過不斷檢測吸垢籃電極工作電流調(diào)整工作電壓,使得吸垢籃電極工作電流保持在6A左右。3、介紹了系統(tǒng)軟件的設(shè)計,包括系統(tǒng)主程序的設(shè)計、變頻信號產(chǎn)生程序設(shè)計、數(shù)據(jù)采集單元軟件設(shè)計和系統(tǒng)通信模塊軟件設(shè)計,還有上位機系統(tǒng)設(shè)計。利用VC編寫了上位機系統(tǒng),通過CAN總線通訊方式,對電解吸垢系統(tǒng)進行遠(yuǎn)程操控,設(shè)定系統(tǒng)的初始參數(shù),同時能夠?qū)崟r監(jiān)控電解吸垢系統(tǒng)的工作狀態(tài)。4、對電解吸垢系統(tǒng)進行調(diào)試與實驗,記錄水質(zhì)的硬度、電導(dǎo)率、PH和結(jié)垢量等實驗數(shù)據(jù)。經(jīng)實驗數(shù)據(jù)表明,該系統(tǒng)能夠有效降低循環(huán)水的水質(zhì)硬度和電導(dǎo)率,穩(wěn)定水質(zhì)的PH值,能夠有效阻止循環(huán)冷卻系統(tǒng)結(jié)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.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ085.4

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