【摘要】：隨著國家振興東北老工業(yè)基地戰(zhàn)略的提出,沈陽的經(jīng)濟再一次實現(xiàn)快速發(fā)展,城市規(guī)模、人口數(shù)量都將不斷增加,城市污水量也隨之增加,對污水處理能力以及水質(zhì)提出了更高要求,而現(xiàn)有的污水處理廠智能化程度相對落后,因此,針對陳舊的污水處理技術節(jié)能智能改造迫在眉睫。本文針對沈陽某污水處理廠的控制系統(tǒng)進行智能化改造。該污水處理廠采用活性污泥法處理工藝,污水來源主要以城市生活污水為主,該廠對沈陽市民的正常生活起著重要作用。智能化改造的思路是以PLC為控制中心,將采集到的相關信號傳輸?shù)絇LC中,然后根據(jù)具體設計要求,對相關的設備進行智能化控制,達到節(jié)省人力資源,滿足出水水質(zhì)的要求。該系統(tǒng)智能化改造實施方案是在污水處理廠現(xiàn)有活性污泥法工藝的基礎上,對污水處理的三個不同階段進行檢測傳感器及儀器儀表的選型,并對控制系統(tǒng)控制器進行了選型;確定每個子系統(tǒng)的工作模式;選用西門子公司S7—200系列PLC作為主控制器對處理過程進行自動控制,并采用STEP7—Micro/Win32軟件編制PLC控制程序;利用Lab VIEW圖形化編程軟件進行工控機上的污水處理廠仿真軟件開發(fā),設計污水處理廠的總體布局圖以及各子系統(tǒng)的仿真圖,實現(xiàn)對各參數(shù)的采集并顯示;被控設備通過RS485接口與PLC連接,變頻器通過USS協(xié)議與PLC的通訊;采用嵌入式過程控制標準(OPC)實現(xiàn)PLC與仿真軟件之間的通訊,實現(xiàn)工控機對物理參數(shù)的實時測控。本文所論及的改造內(nèi)容以及開發(fā)的污水處理軟件,并為工作人員開發(fā)一套污水處理廠仿真系統(tǒng),使該污水廠在智能化、安全性和經(jīng)濟性上都得到了進一步的提升,減少了日常運行繁瑣管理工作,提高了污水處理系統(tǒng)自動化程度,能夠?qū)崿F(xiàn)規(guī)定的一級A排放標準,帶來良好的經(jīng)濟效益和社會效益,具有一定應用價值。
[Abstract]:With the proposal of the national strategy of revitalizing the old industrial base in Northeast China, Shenyang's economy has once again achieved rapid development. The size of the city and the number of people will continue to increase, and the amount of urban sewage will also increase. Higher requirements for wastewater treatment capacity and water quality have been put forward, but the existing sewage treatment plants are relatively backward in intelligent degree. Therefore, it is urgent to improve the energy saving intelligence of the old sewage treatment technology. In this paper, the control system of a sewage treatment plant in Shenyang is reformed intelligently. The sewage treatment plant uses activated sludge process, the main source of sewage is municipal sewage, this plant plays an important role in the normal life of the people of Shenyang. The idea of intelligent transformation is to take PLC as the control center and transmit the relevant signals to the PLC. Then according to the specific design requirements, the relevant equipments are intelligently controlled to save human resources and meet the requirements of the effluent water quality. On the basis of the existing activated sludge process in sewage treatment plant, the intelligent transformation of the system is based on the selection of detection sensors and instruments in three different stages of sewage treatment, and the selection of the controller of the control system. The working mode of each subsystem is determined, and Siemens S7-200 series PLC is selected as the main controller to control the process automatically, and the PLC control program is programmed by STEP7-Micro/Win32 software. The simulation software of sewage treatment plant on industrial control computer is developed by using Lab VIEW graphical programming software. The overall layout diagram of sewage treatment plant and the simulation diagram of each subsystem are designed to collect and display the parameters. The controlled equipment is connected to PLC through RS485 interface, the inverter communicates with PLC through USS protocol, and the embedded process control standard (OPC) is used to realize the communication between PLC and simulation software to realize the real-time measurement and control of physical parameters by industrial control computer. The revamping contents and the sewage treatment software are discussed in this paper, and a set of simulation system of sewage treatment plant is developed for the staff, which makes the sewage treatment plant more intelligent, safe and economical. It can reduce the tedious management of daily operation, improve the automation degree of sewage treatment system, realize the first class A discharge standard, bring good economic and social benefits, and have certain application value.
【學位授予單位】：沈陽大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X703

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本文編號：2367380