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C98043-A7014-L1現(xiàn)貨 in stock! 歡迎來電咨詢~?。?

一、系統(tǒng)描述
　　醋酸乙烯是一種十分重要的工業(yè)原料,其市場非常廣闊.它的生產(chǎn)過程主要分為兩個(gè)大的過程: 合成和精餾.前者是發(fā)生化學(xué)反映生成醋酸乙烯的過程, 后者則是將生成的醋酸乙烯通過學(xué),物理過程來進(jìn)行提純.其工藝流程圖如下:
　2、本工藝的特點(diǎn)和難點(diǎn)
　　醋酸乙烯的生產(chǎn)是個(gè)塔體非常多的系統(tǒng),調(diào)節(jié)回路眾多,系統(tǒng)的關(guān)聯(lián)性非常強(qiáng),一個(gè)參數(shù)的控制的好壞直接影響到其他參數(shù)的控制的成敗.一個(gè)系統(tǒng)的波動(dòng)可能帶垮整個(gè)系統(tǒng).,因?yàn)槠洚a(chǎn)品醋酸乙烯的濃度要求非常高,達(dá)到99.9%以上,因此對(duì)反應(yīng)溫度,以及流量等參數(shù)的控制要求非常平穩(wěn),合成反應(yīng)器的中溫要求170正負(fù)0.5度,醋酸蒸發(fā)器液位要求達(dá)到正負(fù)1%,還有乙炔的流量非常不穩(wěn)定,可控性不太好.這些都對(duì)控制的精度提出了很高的要求.
　　3、工藝對(duì)控制系統(tǒng)的要求
　　a、實(shí)現(xiàn)各個(gè)單元操作的集中監(jiān)控，包括：溫度、壓力、流量、液位等物理量的監(jiān)測(cè)與控制。動(dòng)態(tài)參數(shù)檢測(cè)、控制必須準(zhǔn)確、可靠。合成反應(yīng)器的中溫要求170正負(fù)0.5度,醋酸蒸發(fā)器液位要求達(dá)到正負(fù)1%,
　　b、必要的遙控措施,對(duì)突發(fā)事件如停電等，系統(tǒng)應(yīng)采取相應(yīng)的保護(hù)措施，確保在緊急情況下或需要的時(shí)候?qū)σ恍╆P(guān)鍵的控制點(diǎn)(閥門、馬達(dá)等)實(shí)施遙控。
　　c、配置必要的報(bào)警和聯(lián)鎖。
　　d、重要參數(shù)的記錄和方便地查閱其實(shí)時(shí)趨勢(shì)和歷史趨勢(shì)。
　　e、可隨時(shí)監(jiān)測(cè)有關(guān)單元的有關(guān)參數(shù)或重要設(shè)備的運(yùn)行情況。
　　f、控制系統(tǒng)操作簡單，參數(shù)設(shè)置、調(diào)整方便，便于操作，人性化的操作界面。
　　g、操作員站顯示整個(gè)生產(chǎn)工藝流程，修改和打印各種有關(guān)參數(shù)。
　2、FB-2000NS系統(tǒng)硬件配置
　　本控制系統(tǒng)采用了三個(gè)監(jiān)控站,和兩個(gè)現(xiàn)場控制站.穩(wěn)定性.兩個(gè)現(xiàn)場控制站也采取了熱備用冗余,任何一個(gè)出現(xiàn)了故障,自動(dòng)切換到另外一個(gè)上正常運(yùn)行.也增加了系統(tǒng)的可靠性和穩(wěn)定性.所有的模擬量輸出都采取了熱備用,還有重要的顯示參數(shù)也都采取了熱備用..所有的模擬量都采取了和現(xiàn)場信號(hào)的光電隔離,所有的現(xiàn)場信號(hào)均通過了安全柵隔離. DCS的硬件配置如下: FB-2001NS -4塊,FB-2005NS-3塊,FB-2010NS 16塊 ,FB-2020NS 28塊, FB-2030NS 1塊 ,FB-2040NS-4塊 FB-SC20NS/R14塊,FB-SC14NS/R-4塊,FB-SCNS14-8塊.FB-SC30NS1塊. FB-SC42NS-4塊.另外，報(bào)表打印機(jī)一臺(tái)。

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03400 SIEMENS TYP 03400-A NR.340884 GE.548 184.0001.00 (SINUMERIK 3T)-AT DUBAI

NACHI RAX23C USPP RAX23C

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ALLEN BRADLEY 1336-C005-EAD USPP 1336C005EAD

GENERAL ELECTRIC 6VAF554 USPP 6VAF554

STEARNS 1081011A2FBF USPP 1081011A2FBF

SIEMENS 6SE9-216-8CB40 NSFP 6SE92168CB40

BARBER COLMAN 80BE-00044-212-V-00 USPP 80BE00044212V00

Siemens 6ES5 945-7UA21

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SIEMENS 6ES5-712-8BC50 NSFP 6ES57128BC50

Siemens 6ES5 490-8MA12 NSFP 6ES54908MA12

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Siemens K-TP178 6AV6 640-0DA11-0AX0 Protective Film

SALE AMD FX6100 6 Core 3.3G 8G500G 120G SSD HD7750/1G Gaming/Business PC

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Schneider Modicon Card Module NUL 200/AS-BNU1-200

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RIS TM-2482-P13-000-P2-00-RE-00 TEMPERATURE MONITOR 117

SIEMENS AA17-E001G-A USPP AA17E001GA

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Reliance Electric 0-57404-1E 0574041E Network Communications Module Repaired

SIEMENS Drive 6SN1112-1AB00-0AA1

SIEMENS SUN SG-XL8500-SDLT6FC SDLT600 FC Tape Drive SL8500

SIEMENS 6FC4600-1AS01 Free Ship

AllenBradley2711-K10G16/C2711K10G16Panelview

Allen Bradley Versa View 1500H 6189-RDT15CA 2711P-RN6 6182-15TEH6B

ABB IRB 1400 SER 14-20050 ROBOT S4C PLUS CNTRLR TEACH PENDANT W/ MATCHED SET

Advanced Energy RFPP RF10S 7520709010

(O1-10) 1 G&L MOTION CONTROL M.1302.1226 SERVO MOTOR O1-10

MEASUREX 09437701 USPP 09437701

ALLEN BRADLEY 1336F-B020-AA-EN-HAS1-L4 NSFP 1336FB020AAENHAS

GE FANUC IC752WTD805-CB USPP IC752WTD805CB

FANUC A16B-1211-0150 USPP A16B12110150

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RELIANCE ELECTRIC 45C-410B USPP 45C410B

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WS-C2960-48TC-S CISCO CATALYST 2960-48TC SWITCH-1YEAR - GRADE A Fast Shi

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ADEPT TECH 10332-11400 NSPP 1033211400

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78092-1R

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SIEMENS 6ES5 410-7AA11 6ES54107AA11