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一、系统描述
　　醋酸乙烯是一种十分重要的工业原料,其市场非常广阔.它的生产过程主要分为两个大的过程: 合成和精馏.前者是发生化学反映生成醋酸乙烯的过程, 后者则是将生成的醋酸乙烯通过学,物理过程来进行提纯.其工艺流程图如下:
　2、本工艺的特点和难点
　　醋酸乙烯的生产是个塔体非常多的系统,调节回路众多,系统的关联性非常强,一个参数的控制的好坏直接影响到其他参数的控制的成败.一个系统的波动可能带垮整个系统.,因为其产品醋酸乙烯的浓度要求非常高,达到99.9%以上,因此对反应温度,以及流量等参数的控制要求非常平稳,合成反应器的中温要求170正负0.5度,醋酸蒸发器液位要求达到正负1%,还有乙炔的流量非常不稳定,可控性不太好.这些都对控制的精度提出了很高的要求.
　　3、工艺对控制系统的要求
　　a、实现各个单元操作的集中监控，包括：温度、压力、流量、液位等物理量的监测与控制。动态参数检测、控制必须准确、可靠。合成反应器的中温要求170正负0.5度,醋酸蒸发器液位要求达到正负1%,
　　b、必要的遥控措施,对突发事件如停电等，系统应采取相应的保护措施，确保在紧急情况下或需要的时候对一些关键的控制点(阀门、马达等)实施遥控。
　　c、配置必要的报警和联锁。
　　d、重要参数的记录和方便地查阅其实时趋势和历史趋势。
　　e、可随时监测有关单元的有关参数或重要设备的运行情况。
　　f、控制系统操作简单，参数设置、调整方便，便于操作，人性化的操作界面。
　　g、操作员站显示整个生产工艺流程，修改和打印各种有关参数。
　2、FB-2000NS系统硬件配置
　　本控制系统采用了三个监控站,和两个现场控制站.稳定性.两个现场控制站也采取了热备用冗余,任何一个出现了故障,自动切换到另外一个上正常运行.也增加了系统的可靠性和稳定性.所有的模拟量输出都采取了热备用,还有重要的显示参数也都采取了热备用..所有的模拟量都采取了和现场信号的光电隔离,所有的现场信号均通过了安全栅隔离. DCS的硬件配置如下: FB-2001NS -4块,FB-2005NS-3块,FB-2010NS 16块 ,FB-2020NS 28块, FB-2030NS 1块 ,FB-2040NS-4块 FB-SC20NS/R14块,FB-SC14NS/R-4块,FB-SCNS14-8块.FB-SC30NS1块. FB-SC42NS-4块.另外，报表打印机一台。

ALLENBRADLEY1794-0W8OUTPUTMODULE17940W8

ALLEN-BRADLEY 1771- OGC +5V TTL OUTPUT MODULE

ABB Processor Board 3BSE000470R1, SE9918P182 PFBK 165 SURPLUS

ADEPT TECHNOLOGY 1033012350 SIO CONTROL MODULE

A06B-0502-B372#C000 FANUC SERVO MOTORS REMANUFACTURED

75 KVA 240 DELTA TO 208 Y/120 3 PHASE TRANSFORMER

RELIANCE ELECTRIC 86466-3R USPP 864663R

ALLEN BRADLEY 4100-232 USPP 4100232

ALLEN BRADLEY 1775-S5 USPP 1775S5

INDRAMAT CLM01.3-X-0-4-0 NSFP CLM013X040

YAMATAKE 80360145-011 USPP 80360145011

UNIMATION INC 3D32457G02 USPP 3D32457G02

HONEYWELL 14506839-001 USPP 14506839001

Siemens 6ES5-242-1AA32 USPP 6ES52421AA32

SIEMENS 6ES5 375-8LA11 6ES53758LA11

SIEMENS Digital Input Module 6ES5 436-4UA12 NIB OPENED TO TAKE PICTURES

Siemens 6ES5 998-0UP21 NSPP 6ES59980UP21

SIEMENS 6ES5470-4UA12 6ES54704UA12 NIB

SIEMENS MP277-10 6AV6 643-0CD01-1AX1 Touchscreen Glass

RELIANCE ELECTRIC 0-57416-K NSPP 057416K

Texas Instruments 500-5052

Square D NEHB442ASP-N Power Interface Module Make An Offer

Unisphere Juniper ERX1400 SRP-10-ECC 10-Gbps SRP module Make Offer

Siemens capacitors 0.68uF 100V 500 pcs NIB

Modicon AS-W904-006

Schneider Modicon 5 Slot Secondary Subrack DTA 201/AS-HDTA-201 WARRANTY

Schneider Modicon P890 I/O PROCESSOR AS-P890-000

Schneider Modicon AS-BDAP-258 NSFP ASBDAP258

Schneider Modicon AS-BADU-205

Schneider Modicon /GOULD/AS-884A-101 PROCESSOR 2K W/REMOTE I/O

Schneider Modicon COMM. PROCESSOR MODULE AS-C921-000

Schneider Modicon TSXP575634M

SCHNEIDER TSX MICRO TSXDEZ08A4 DISCRETE INPUT MODULE

Ready bundle for WS-X6708-10G-3C 8 Cisco X2-10GB-ER

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SIEMENS SINUMERIK OP010 6FC5 203-0AF00-0AA0 MembraKeypad

Mitsubishi MELSEC A1S-D51S A1SD51S Communication Module PLC Programmable

SIEMENS Simodrive 6SN1118-0AA11-0AA1 Module

SIEMENS Sinumerik Hand Wheel 6FC9320-5DC00

SIEMENS 6FC5210-0DF21-2AA0 DRIVE

AllenBradley1746-IO12SeriesBInputOutputModuleSLC500Bulletin1746

ALLEN BRADLEY SLC 500 4-CHANNEL ANALOG INPUT / OUTPUT MODULE 1746 F104V

ABB ROBOT SERVO 3HAC 3579-1/04

A06B-0143-B088#7076 FANUC SERVO MOTORS REMANUFACTURED

0020-39001 - VALVE, Throttle PLUNGER

MODICON PC-BALU-821 NSFP PCBALU821

ALLEN BRADLEY 150-B360NBD USPP 150B360NBD

ALLEN BRADLEY 1326AB-C2C-21 USPP 1326ABC2C21

GENERAL ELECTRIC 269-120N-125VDC USPP 269120N125VDC

SQUARE D HDMPM21012186 NSFP HDMPM21012186

SIEMENS 6SC6-120-0FE01 USPP 6SC61200FE01

ASEA BROWN BOVERI 57340001-K/2 USPP 57340001K2

Siemens 6ES5 943-7UB11 -- 6ES59437UB11

Siemens SIMATIC S5 6ES5 456 7LA11

SIEMENS 6ES5-700-2LA12 NSPP 6ES57002LA12

Siemens 6ES5 456-4UA12SERIES DIGITAL OUTPUT MODULE 16POINT 55025

SIEMENS 64kB MMC 6ES7953-8LF20-0AA0

Siemens HMI PP7 6AV3688-3AA03-0AX0 Operator panel

SANS DIGITAL MR4UT MobileRaid 4-bay hardware RAID

Square D FAL34025

SIEMENS HTRI-D INTEL INTERFACE DUAL MODULE

SERIES E CAT REV K01 F/W REV D.1

Siemens 6SE7018-0EA84-1HF3

Siemens TP7 6AV3607-1NH01-0AX0 Touch Glasss

Schneider Modicon DEP210/AS-BDEP-210 INPUT MODULE NIB

Schneider Modicon ASB885002 GOULD MODULE AS-B885-002

Schneider Modicon AS-B837-016 USPP ASB837016

Schneider Modicon SEALED AS-B829-116 MODULE

Schneider Modicon B804 AS-B804-016 115V 16PT INPUT MOD ASSEMBLY

Schneider Modicon AS-H819-209 Housing Assembly 800 rack plc 19"

Schneider PLC Analog Output Module 170AAO12000

Siemens 6ES5430-4UA12 Simatic Input Module 20280

Roland Fantom XR SRX-05 upgraded 128-Voice Synthesizer / Sampler Module-MIDI 2

SIEMENS CONTROL MONITOR M IPC3510A300MGT TOUCH SCREEN

SIEMENS SINUMERIK 840DE 6FC5356-0BB14-0AA0 NCU 561.4

RELIANCE ELECTRIC NETWORK COMMUNICATION PLC MODULE 57404-1 57-404-1 57404-1F

SIEMENS CONTROLLER CARD 6SN1118-0AD11-0AA0 ~

SIEMENS SIMODRIVE SERVO DRIVE 6SN1145-1AA01-0AA2

SIEMENS 6FC5110-0CB01-0AA0 6FC51140CB010AA0 version E

ALLENBRADLEY2711P-T9C1OPERATORINTERFACEPANELVIEW900SERIESCREVC

Allen Bradley Versaview 1500P 6181P-15TPXPHSS Rev A Ser C For Windows XP AB/COA

ABB FI803F 3BDH000032R1 good in condition for industry use

Advanced Energy ATX-600 Impedance Matching Network -

(M3) 1 BAYSIDE ( Parker) RA142-010-LB GEAR HEAD MOTOR M3

MARPOSS 3014332600 USPP 3014332600

ALLEN BRADLEY 1334-FOB-T4 USPP 1334FOBT4

GE FANUC IC3600LSRB1 NSPP IC3600LSRB1

FANUC A06B-6058-H221 USPP A06B6058H221

SIEMENS 1FT6105-8AB71-1TA0 NSFP 1FT61058AB711TA0

RELIANCE ELECTRIC 0-60002-5 USPP 0600025

SIEMENS 6DD1-642-0BC0 NSPP 6DD16420BC0

Siemens 6ES5 466-3LA11 6ES5466-3LA11

Siemens 6ES5-943-7UB21 USPP 6ES59437UB21

SIEMENS 6ES5-435-6AU11 USPP 6ES54356AU11

Siemens 6ES5 700-8MA11 I/O Bus Module Terminal WOW

Siemens S5 6ES5 926-3SA11 6ES59263SA11

Siemens C7-636 6ES7636-2EC00-0AE3 in Box

SIEMENS 6ES5-305-7LB11 USPP 6ES53057LB11

Square D 8020 SCP-313

NTN425AA Nortel Telecommunication Interface Card Module

WS-C3750G-48TS-S CISCO 3750G-48TS SWICTH W/1 YR -WSC3750G48TSS

Siemens 6ES7231-7PD21-0XB0 6ES72317PD210XB0

SIEMENS SIMATIC PANEL PC 870 PC870 6AV7743-2AC00-0AA0 Membrane Keypad

Reliance 612405-9R

Schneider Modicon BKF-201AS-BBKF-201 BKF201 Free Ship

Schneider Modicon AS-B374-001 ASB374001 Analog Output FS

Schneider Modicon AS-T484-002 USPP AST484002

Schneider Modicon AS-BDAP-210 DISCRETE OUTPUT MODULE

Schneider Modicon AS-B824-000 I/O Module

MODICON AS-B355-001 OUTPUT MODULE OLD STOCK FREE SAME DAY SHIPPING USA

Siemens Input Module 6ES5 436 4UB12 SURPLUS

SIEMENS 505-9201 MICRO-REMOTE I/O MODULE 5059201

SIEMENS OUTPUT MODULE 2AMP 24VDC 1P 6ES7 132-4BB30-0AA0

SIEMENS Simodrive Sinumerik 6RB2100-0NA21 includes 6RB2100-0SA21

TELLABS 5323B PORT SERIAL MODULE 825310 Communications

SIEMENS 6SN1118-0DM21-0AA0 6SN11180DM210AA0 NIB

SIEMENS Simodrive / Sinumerik E52930-A3210-C5-B1 Board.

SIEMENS 6FC5357-0BB12-0AE0 SINUMERIK 840D 6FC5247-0AA00-0AA3

ADVANTECH PCM-4823 Single Board Computer

Allen-Bradley 1746-OW16 Output Module

ABB BAILEY SYMPHONY CONTROLS DIGITAL IMASI23 ANALOG INPUT SLAVE MODULE 84812

ADEPT TECH 10330-00500 NSPP 1033000500

(#3461) SEW Eurodrive MoviDrive MDS60A0300-503-4-00 NIB

HUNKAR LABS 315-0 USPP 3150

TB WOODS WFC-4050-0CHT USPP WFC40500CHT

DIGITAL COMPUTER 5016017-01-D1-P3 USPP 501601701D1P3

CROUSE HINDS WSR6351 NSPP WSR6351

PACIFIC SCIENTIFIC SC752A001-02 USPP SC752A00102

MODICON AS-506P-002 NSFP AS506P002

HERION 59-989-15 USPP 5998915

Siemens 6ES5 308-3UB11 NIB Free Ship

Siemens 6ES5-525-3UA11 USPP 6ES55253UA11

SIEMENS 6ES5-372-0AA61/6ES5372-0AA61 MEMORY SUBMODULE NIB

Siemens 6ES5 232-1AA11 S5 PLC CARD CIRCUIT BOARD MODULE EMA-W88 56781

Siemens 6ES5-452-8MR11Output Module 4POINT 24VDC

SIEMENS 6GK7-242-2AX00-0XA0 6GK7242-2AX00-0XA0 FreeShip

Siemens TP177B 6AV6642-0BA01-1AX1 Touchscreen Glass

Siemens 6ES5725-2AC01

Landis Gyr Powers System 600 536-050 LOT Power Modules Trunk Interface HVAC

YASKAWA ELECTRIC JAMSC-B1051B USPP JAMSCB1051B

SIEMENS 6ES7 222-1HF32-0XA0 6ES7222-1HF32-0XA0 FreeShip

Siemens OP37 6AV3 637-1LL00-0AX1 Membrane Keypad

Red Lion PRA1-3021

Schneider Modicon AS-B810-008 Isolated Output Module 115 VAC ASB810008

Schneider Modicon AS-884A-200 USPP AS884A200

Schneider Modicon AS-P120-000 USPP ASP120000

Schneider Modicon AS-B239

Schneider Modicon AS-516P-008 CNC Memory Board AIPR/UVG

Modicon XBT FC044610 Telemecanique Magelis 24VDC 35W

Siemens Simatic S7-200 PLC 6ES7 221-1BF22-0XA0 DC Input Module

TELEMECANIQUE TSX-ASZ-200 TSXASZ200

Siemens Simatic Relay Output Module U-05T

Siemens 9610 9610DC-1155-GZZA Power Meter Display ION Ethernet Access NNB

SIEMENS Sinumerik FPCI/ISA 6FC5247-0AA02-1AA0 6FC5 247

SIEMENS 6SN1118-1NH00-0AA2 6SN11181NH000AA2

SIEMENS SIMODRIVE 6SN1123-1AA02-0FA0

SIEMENS I/O MODULE 6FC3984-3RA 6FC39843RA 64E/32AUSGAEN

Advantech PCM-3810 A2 PC/104

Allen-Bradley 2711-K5A8 PanelView 550 Operator Interface Panel

ABB 5SDD0760D0001 3BHL001862P0001 Thyristor for ACS1000 AC Drive

Acrison 305-0096 Gearbox BDF1.5 OUT THD

AAT-SOT23-5-AAT1106 2-CHANNEL STEP-UP PWM IC Controller

85179 , Dayton 1LNF4 AC Adj Frequency Drive, 20 HP, 3 PH, 460V

SIEMENS 6SE3-121-7DG40 NSFP 6SE31217DG40

ATLAS COPCO PF2102-S7-115R USPP PF2102S7115R

ASEA BROWN BOVERI DSQC 314B USPP DSQC314B

MITSUBISHI Q173-CPU-N USPP Q173CPUN

INDRAMAT MAC-132A-1-JD-4-C/230-R-0/DIS20LX/S001 USPP MAC132A1JD4C230R

ASEA BROWN BOVERI 3HAB2220-1 USPP 3HAB22201

TEXAS INSTRUMENTS PLC 500-2102 NSPP 5002102

Siemens 6ES5-441-4UA14 USPP 6ES54414UA14

SIEMENS 6ES5 482-8MA13 DIGITAL I/O MODULE

SIEMENS S5 6ES5 308-3UA12 Serial Interface 6ES53UA12

Siemens S5 6ES5 452-8MR11 Relay Module - 4 Relay

SIEMENS 6ES7 621-6BD01-0AE3 Membrane Keypad C7-621

Siemens S30864-X230-A53 Cable for 3G WCDMA STN NB-880

Precision Digital Panel Mounted Temperature Display

Honeywell 51400955-100 DCS Process Network Interface Board Module Card

VW Bluetooth Interface Communication Module 1K8035730D 1k8 035 730 D

Siemens 6DD1660-0AH1 CS51

Siemens LOGO! 12/24RCo 6ED1052-2MD00-0BA6 IN BOX

Omron 3G2A5-OC221

Schneider Modicon AS-P120-000 PLC Power Supply PS

Schneider Modicon LEVEL-3 16K 3CARD CHASSIS 584 AS-584A-002

Schneider Modicon AS-H819-007 USPP ASH819007

Schneider Modicon Gould/ AS-9003-821

Schneider Modicon AS-BDAP-218 FACTORY SEALED Discreet Output Relay ASBDAP218

Schneider Modicon Reed Relay Output Module AS-B840-108 - Repaired

Telemecanique GV2ME10C / 4-6.3A Motor Circuit Breaker

Schneider TELEMECANIQUE MODICON TSXRKZ02 Exsion Rack

Siemens6DD1642-0BC0Analog Output Module SDYND EA12

Siemens 6AV6 545-0BA15-2AX0 6AV65450BA152AX0 Panel

SIEMENS Sinumerik 6FC5111-0CA01-0AA0 DMP 16 Output E-Modul Compact -

GE FANUC ENHANCED COMMUNICATION MODULE IC693CMM302C

SIEMENS SIMODRIVE 6SN1145-1BA01-0DA1SINUMETIK 840D NCU 6FC52476SN11236FC5357

SIEMENS SINUMERIK 3/800 6FC3988-7AH20 TESTED WARRANTY

SIEMENS IBM 6400 Model 015 Printer Ribbons - IBM 6400 Model 15

ALLEN-BRADLEY DATALINER OPERATOR INTERFACE CAT2706-D21J8

A-B NIPPONDENSO 8500-A3D-L1B AC Servo Motor [PZ4]

AC Motor Invertor - 30 HP - 480 Volt - Three Phase Input

A06B-0583-B072#7008 FANUC SERVO MOTORS REMANUFACTURED

750' Notre Dame 1/0 1/0 1/0 2 Aluminum URD Direct Burial URD XLP USE 600V

RELIANCE ELECTRIC GV3000E-AC008-AA-DBU NSFP GV3000EAC008AADB

ALLEN BRADLEY 5250-LP1 USPP 5250LP1

ALLEN BRADLEY 2094-BC07-M05S USPP 2094BC07M05S

INDRAMAT KDS1.1-150-300-W1 USPP KDS11150300W1

YASKAWA ELECTRIC CACR-TM333Z1SPY8 NSFP CACRTM333Z1SPY8

WESTINGHOUSE 210P085H01-1 USPP 210P085H011

HYDE PARK SP106 USPP SP106

Siemens 6ES5-244-3AA22 USPP 6ES52443AA22

SIEMENS 6ES5 376-1AA31 -- 6ES53761AA31

SIEMENS Interface Module 6ES5 752-0AA43 WITH PAPERWORK

Siemens Analog Input Module 6ES5 460-7LA12

Siemens 6ES7 131-0BL00-0XB0 6ES7131-0BL00-0XB0 ET200B

SIEMENS MP370 12.1" MP370-12 6ES7542-0DA10-0AX0 Touch Screen Display Glass

Reliance Automate 30 45C305A 45C305 Processor

Texas Instruments 505-4508

STATIC CONTROLS 920-M-2-V 4.3 INTERFACE DISPLAY MODULE

UBR7246VXR CISCO UBR 7246 4MC 2PA SLOTS 1YR - ASK 4 QTY

Siemens Control Board C98043-A1304-L Simodrive

Modicon AS-WBXT-201

Schneider Modicon NIBAutomation Output Module DAP 210/AS-BDAP-210

Schneider Modicon AEG/GOULD/MODICON/ AS-E381-902 EXECUTIVE CARTRIDGE XLNT

Schneider Modicon AS-BDEP-112 NSFP ASBDEP112