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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)測與控制。動(dòng)態(tài)參數(shù)檢測、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)趨勢和歷史趨勢。
　　e、可隨時(shí)監(jiān)測有關(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)。

FANUC A06B-6058-H221 USPP A06B6058H221

INDRAMAT CLM01.3-X-0-2-0-FW USPP CLM013X020FW

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750' wake forest 4/0 4/0 4/0 2/0 Cable Wire Direct Burial XLP USE URD 600 Volt

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Texas Instruments 505-4608

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Modicon D4-043506657

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Schneider Modicon ASBDAP216N A120 IO DC OUT 16 pt AS-BDAP-216N

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Schneider Modicon DAP-220/AS-BDAP-220 Discrete Combination ASBDAP220 NIB

Schneider Soft Starter ATS48D38Q 18.5KW

SCHNEIDER MODICON TSX PREMIUM SINK CONNECTION INPUT MODULE TSXDEY64D2K

Quantum 8pt Thermoc Input Module model 140 ATI 030 00

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SIEMENS OFFER & WIN 6FX1111-5AA00 Sinumerik Rack

MITSUBISHI A1SJ71UC24-R4 COMMUNICATION MODULE GOOD TAKEOUT

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Allen Bradley SLC 500 1746-OA8 SER D Output Module

ABB ROBOTIC DRIVE 3HAB8101-6/11A

A06B-0147-B075#0076 FANUC SERVO MOTORS REMANUFACTURED

0-2000 mkVb 1% Micro flux meter Veber meter F191 an-g. Agilent

NACHI AUXL-111C USPP AUXL111C

ALLEN BRADLEY 1756-L55M14 FNFP 1756L55M14

ALLEN BRADLEY 1336-B020-ECE-FA2 NSPP 1336B020ECEFA2

GENERAL ELECTRIC 531X140CCHADM2 USPP 531X140CCHADM2

SQUARE D TE4XLHPGCLDCSCDS NSFP TE4XLHPGCLDCSCDS

SIEMENS 6SE7-021-3TP50-Z NSFP 6SE70213TP50Z

BALLUFF BIS-C-601-023-650-03-KL1 NSFP BISC60102365003K

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Samsung MLC SSD MMCRE28G5DXP-0VB SATA Hard Drive MMCRE28G5MXP-0VB

Tadiran TL-2300

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Schneider Modicon AS-BDAP-216N ASBDAP216N DC Output

Schneider Modicon AS-B873-001 ANALOG INPUT MODULE ASB873001

Schneider Modicon AS-B846-002 USPP ASB846002

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RME HAMMERFALL HDSP AES-32- PROAUDIOSTAR

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Advanced Energy Mercury 10013 Match, P/N 27-256558-00

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MEASUREX 08591501 USPP 08591501

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853-012500-003 DETECTOR, EDGE ASSY TYPE

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BAILEY CONTROLS IMMFP-03 NSPP IMMFP03

ASEA BROWN BOVERI YT204001-FSI1 USPP YT204001FSI1

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VIDEO JET 358160-E NSFP 358160E

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