【正文】 The catalytic bustion process automatic control design for low concentrations of anic waste gas Abstract PTA oxidation reaction is the maximum number of harmful exhaust gases discharged by PTA plant, where the content of VOCs is in a low concentration. If using recycling technology, there are some disadvantages including low efficiency, high unit volume, high cost and so on. Catalytic bustion technology is currently the most mature degradation technology, the deposition temperature of harmful substances reduced to 280 ~ 450 ℃ by means of a catalyst role, with lower burning temperature, oxidation temperature, low energy consumption, high efficiency, NOx generation minimal amount, no secondary pollutants and a lot of advantages. In this paper, we use low concentration of anic waste process as research object, designing automatically controlled process, studies are as follows: 1. This paper is based on the catalytic bustion of low concentrations of anic waste process, carefully analyzed the mechanism characteristics of the catalytic bustion reactor, heat exchanger, and by the characteristics of the system , disturbance and control goals analysis, we determined the controlled variables and manipulate variables of each loop, and respectively use PID control strategy, ratio control, the feedforward control and cascade control strategy to design the control process scheme. 2. According to the control design industry standard, we select each measurement instrument, analog instrument, control instrument and the characteristics of the valve in the system, give the specific models. We select each automatic valve’s flow characteristics and aerodynamic characteristics according to the III characteristics of the system and the goals. 3. The upper catalytic bustion process integrated monitoring platform is designed using Siemens Simatic WinCC industrial control configuration software design, using a puter to archive process variables and achieve historical data archiving and display. Then OPC technology is used to achieve data exchange munication between MATLAB and the WinCC. Keywords: Catalytic bustion, control system design, WinCC integrated monitoring, MATLAB本科畢業(yè)設(shè)計 IV 目錄 摘要 .................................................................................................................................. I Abstract ............................................................................................................................ II 目 錄 ................................................................................................................................ IV 第一章 緒論 .................................................................................................................... 1 課題背景與意義 ................................................................................................... 1 催化燃燒基本原理 ............................................................................................... 2 化學(xué)反應(yīng)器的基本控制策略 ................................................................................. 3 控制系統(tǒng)仿真軟件的應(yīng)用研究現(xiàn)狀 ....................................................................... 4 仿真模型與監(jiān)控平臺間的通訊技術(shù) ....................................................................... 4 化工過程集成監(jiān)控軟件 ........................................................................................ 5 第二章 低濃度有機廢氣催化燃燒的工藝簡介與特性分析 .................................................. 8 低濃度有機廢氣催化燃燒工藝流程 ...................................................................... 8 低濃度有機廢氣催化燃燒工藝裝置特性 ............................................................... 9 溫度特性 .................................................................................................... 9 壓力特性 .................................................................................................... 9 流量特性 .................................................................................................... 9 催化燃燒工藝擾動分析 ...................................................................................... 10 進料流量與進料成分 ................................................................................ 10 進料溫度或者進料熱熵 ............................................................................. 10 催化劑進料的流量 .................................................................................... 11 第三章 催化燃燒工藝控制方案設(shè)計 ............................................................................... 13 控制目標分析 ................................................................................................... 13 被控變 量與操作變量的選擇 .............................................................................. 13 閥門特性選取 ................................................................................................... 14 控制系統(tǒng)設(shè)計 ................................................................................................... 15 E101 流量控制 ........................................................................................ 16 管道回路流量控制 ................................................................................... 17 D101 催化燃燒反應(yīng)器控制 ........................................................................ 17 電加熱器溫度控制 ................................................................................... 18 第四章 控制方案儀表硬件選型 ...................................................................................... 20 自動控制系統(tǒng)儀表選型原則 ............................................................................... 20 自動控制系統(tǒng)儀表選型 ...................................................................................... 21 溫度儀表 .................................................................................................. 21 流量儀表 .................................................................................................. 22 第五章 催化燃燒過程集成監(jiān)控平臺的建立 .....................................