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10%,三相,交 流, ; 矢量控制方式,可構(gòu)成閉環(huán)矢量控制,閉環(huán)轉(zhuǎn)矩控制; 高過載能力,內(nèi)置制動單元; 三組參數(shù)切換功能??梢蚤L期檢測易燃易爆氣體,也可以長期工作于有毒有害環(huán)境。 氣動三通調(diào)節(jié)閥 ,電動三通分流調(diào)節(jié)閥 ,壓力調(diào)節(jié)閥 亦稱調(diào)節(jié) 閥、流量控制閥、流量控制器、動態(tài)平衡閥、流量平衡閥,是一種直觀簡便的流量調(diào)節(jié)控制裝置,調(diào)節(jié)閥結(jié)構(gòu)組成 調(diào)節(jié)閥通常由電動執(zhí)行機(jī)構(gòu)或氣動執(zhí)行機(jī)構(gòu)與閥體兩部分共同組成。實物圖如圖 所示: 本科生畢業(yè)設(shè)計(論文) 19 圖 PT100 正溫度系數(shù)熱敏傳感器 壓力傳感器目前最長使用的工作原理 :壓阻式、電容式、壓電式、晶體諧振式等。它們特別穩(wěn)定,并有許多種配置。 增加 20%備用量,以便隨時增加控制功能:數(shù)字量 輸入點數(shù)為: 4? ( 1 + 10%) =5 輸出點數(shù)為: 4? ( 1 + 10%) =5 模擬量 輸入點數(shù)為: 5? ( 1 + 10%) =6 輸出點數(shù)為: 2? ( 1 + 10%) =3 控 制系統(tǒng) PLC 的 I/O 點分配如表 所示。假設(shè)此時混合煤氣熱值偏低, A=4000,由 上面 公式可得到此時的系統(tǒng)相對增益矩陣為 13 11 1 1314 ???? ???? 此時熱值偏低,有兩種調(diào)節(jié)方法:開大焦閥或關(guān)小高閥。因此便嘗試著以模糊數(shù)學(xué)來處理這些控制問題。壓力大于 10 kPa。然后與高爐煤氣或轉(zhuǎn)爐煤氣混合。 混壓調(diào)節(jié)回路如圖 所示 圖 混壓調(diào)節(jié)回路圖 混壓調(diào)節(jié)就是控制高爐煤氣的兩道閥門。 本科生畢業(yè)設(shè)計(論文) 3 工業(yè)化網(wǎng)絡(luò)技術(shù)的發(fā)展為煤氣加壓控制系統(tǒng)更好的融入整個工廠生產(chǎn)管理信息系統(tǒng)提供了便利的條件。當(dāng)從一次能源 (如煤 )轉(zhuǎn)換成二次能源 (煤氣 )時,由于一次能源燃質(zhì)不穩(wěn),在轉(zhuǎn)換過程中必然導(dǎo)致二次能源 (煤氣 )燃質(zhì)也不穩(wěn),即煤氣燃質(zhì)具有較大的不確定性。 關(guān)鍵字 :冷軋煤氣,加壓站, PI 調(diào)節(jié), 變頻器 ,安全柵 本科生畢業(yè)設(shè)計(論文) II Abstract Coldrolled steel gas mixed pressurized system is an important part of the production, mixed gas directly affects the quality of steel production quality and yield. Mixed gas pressure to the plexity, many factors, this design system is to make the pressure points to steady work. The system consists of four control loop, namely heating value adjustment circuit, mixed voltage regulation loop, pressurized machine pressure (frequency) control loop, pressurized machine pressure (discharge) control loop. Four main control loop is to make the cold gas mixed with blast furnace gas pressor stations in the calorific value of coke oven gas through the loop control to adjust the ratio of 4:1, mixed gas regulator valve to adjust the circuit mainly by the PI regulator circuit to adjust, both manual and automatic regulating valve to ensure the accuracy and stability. Frequency regulation to ensure the pression machine at a steady speed range, steady pressure to pressure machine. Regulation designed to loop through the inverter to ensure the stability of pressure points. With barriers and other security measures to ensure the safety of the operator. Keywords: Cold gas, Compressor stations, PI regulator, Inverter, Safety barrier 本科生畢業(yè)設(shè)計(論文) III 目錄 第 1 章 緒論 .................................................................................................................. 1 課題背景 ........................................................................................................... 1 國內(nèi)鋼鐵聯(lián)合企業(yè)煤氣優(yōu)化利用現(xiàn)狀 ........................................................... 1 混合煤氣加壓系統(tǒng)的作用、特性及研究現(xiàn)狀 ............................................... 2 第 2 章 方案論證 .......................................................................................................... 4 系統(tǒng)回路的設(shè)計 ............................................................................................... 4 熱值調(diào)節(jié)回路設(shè)計 ................................................................................. 4 混壓調(diào)節(jié)回路 ......................................................................................... 5 加壓機(jī)后壓力(變頻)調(diào)節(jié) ................................................................. 5 加壓機(jī)后壓力(泄放)調(diào)節(jié) ................................................................. 6 混合加壓站系統(tǒng)設(shè)計 ....................................................................................... 7 單加壓工藝流程 ..................................................................................... 7 三個混合站供氣能力的確定 ................................................................. 7 流量調(diào)節(jié)閥組 ......................................................................................... 7 混合加壓站的控制系統(tǒng)設(shè)計 ........................................................................... 8 模糊解耦控制器結(jié)構(gòu)設(shè)計 ..................................................................... 8 蝶閥組控制設(shè)計 ................................................................................... 12 系統(tǒng)框圖 ......................................................................................................... 13 第 3 章 硬件電路設(shè)計 ................................................................................................ 15 PLC 選型 ........................................................................................................ 15 I/O 口的分配 ........................................................................................ 15 CPU 及擴(kuò)展模塊的選擇 ...................................................................... 16 外部接線圖 ................................................................................... 17 傳感器的選擇 ................................................................................................. 18 溫度傳感器的選擇 ............................................................................... 18 壓力傳感器選擇 ................................................................................... 19 流量變送器 .......................................................................................... 20 氣動式調(diào)節(jié)閥選擇 ............................................................................... 21 一氧化碳?xì)怏w報警器 ........................................................................... 22 執(zhí)行器的選擇 ....................................................................................... 24 變頻器的選擇 ....................................................................................... 25