安全仪表系统简介PPT学习教案

1、会计学1安全仪表系统简介安全仪表系统简介2004-04-28 U.Schuenemann2由装置的不可接受的故障所造成由装置的不可接受的故障所造成nS.I.S. are defined in the Safety S.I.S. are defined in the Safety Review Step 2.Review Step 2.安全仪表系统是在安全风险评估的第二步安全仪表系统是在安全风险评估的第二步中定义的中定义的第1页/共22页2004-04-28 U.Schuenemann3第2页/共22页2004-04-28 U.Schuenemann4SeverityProbability严严重

2、性概率重性概率S1S2S3S4P0 (=1/y)ABDEP1 (1/10y)A/BBEEP2 (1/100y)BCEFP3 (1/1.000y)CDFFP4 (1/10.000y)EFFF第3页/共22页2004-04-28 U.Schuenemann5第4页/共22页2004-04-28 U.Schuenemann6adversely affecting the safety function 对安全功能产生不利影响对安全功能产生不利影响no adverse effect onthe safety function对安全功能无不利影响对安全功能无不利影响Failure 故障故障Time-av

3、eraged probability for a passive Time-averaged probability for a passive fault : fault : PFD “Probability of Failure on Demand” PFD “Probability of Failure on Demand” 无源故障的时间平均可能性无源故障的时间平均可能性: :PFD”PFD”指令故障的可能性指令故障的可能性“ “第5页/共22页2004-04-28 U.Schuenemann7Shut-Down SystemShut-Down System 停车系统停车系统Logic

4、 in Failsafe PLC or Hardwired system在故障安全型可编程控制器或硬接线系统中的逻辑Redundant sensors冗余的传感器Valve阀门Solenoid valve电磁阀Instrument air supply 仪表气源Rack Room Rack Room 机柜间机柜间Field Field 现场现场第6页/共22页2004-04-28 U.Schuenemann8mass flow meter mass flow meter after pressure after pressure pulsepulse压力脉冲下游的压力脉冲下游的质量流量计质量流

5、量计lost control valve plugcontrol valve plug, damaged by cavitationrestriction orifice, deformed by flow限流孔板限流孔限流孔板限流孔板, 流量造成的变形流量造成的变形调节阀阀塞调节阀阀塞,空穴造成的损坏空穴造成的损坏第7页/共22页2004-04-28 U.Schuenemann9第8页/共22页2004-04-28 U.Schuenemann10Pf (t) = (1 e-l t ) time average 时间平均值时间平均值PFD Probability of Failure on d

6、emandPFD depends on failure rate of equipment AND test interval.PFD取决于设备取决于设备ANDAND试验间隔的故障率试验间隔的故障率第9页/共22页2004-04-28 U.Schuenemann11第10页/共22页2004-04-28 U.Schuenemann12Field InstrumentsField Instruments85 % 85 % 现场仪表现场仪表Logic SolverLogic Solver(failsafe PLC(failsafe PLC)15 %15 %逻辑解答器逻辑解答器( (故障保护故障保护

7、PLC)PLC)第11页/共22页2004-04-28 U.Schuenemann13Safety Integrity Level(SIL)安全一体化水安全一体化水平平Probability of Failure on Demand (PFD)指令故障概率指令故障概率1 0.10 - 0.01operating and monitoring functions 运行和检测功能运行和检测功能20.01 - 0.001SIS (“Class A functions”)SIS (“A级功能级功能”)30.001 - 0.0001can not be realized by means of E&I

8、functions alone不能仅靠电仪功不能仅靠电仪功能来实现能来实现第12页/共22页2004-04-28 U.Schuenemann14第13页/共22页2004-04-28 U.Schuenemann15BASFs Standard DevicesBASFs Standard Deviceshave passed extensive laboratory have passed extensive laboratory testing acc. to IEC770 at BASF, testing acc. to IEC770 at BASF, Ludwigshafen.Ludwig

9、shafen.are field-proven in non-safety related are field-proven in non-safety related applications.applications.have shown no passive fault during field have shown no passive fault during field testing (at least 10 devices monitored testing (at least 10 devices monitored for 1 year).for 1 year).巴斯夫的标

10、准装置巴斯夫的标准装置已通过广泛的实验室试验已通过广泛的实验室试验, ,符合路德维希符合路德维希港巴斯夫港巴斯夫IEC770IEC770标准标准. .在相关危险应用中经过现场验证在相关危险应用中经过现场验证. .在现场测试中未出现无源故障在现场测试中未出现无源故障 ( (至少至少1010台装置被检测了一年台装置被检测了一年). ).第14页/共22页2004-04-28 U.Schuenemann16SIL3:SIL3:single channel design not allowed single channel design not allowed at least: 2 sensors

11、(1oo2) and 2 at least: 2 sensors (1oo2) and 2 actuators.actuators.12 month test interval.12 month test interval.不允许单信道设计不允许单信道设计至少至少2 2个传感器个传感器(1(1oo2)oo2)和和2 2个致动器个致动器1212个月的试验间隔个月的试验间隔第15页/共22页2004-04-28 U.Schuenemann172oo22oo2 / 2oo41oo12oo31oo31oo2 / 2oo42oo31oo31oo21oo1第16页/共22页2004-04-28 U.Sch

12、uenemann18Objective for Commissioning Test: Objective for Commissioning Test: 调试的目的是为了检查：调试的目的是为了检查：design according to Safety Review 2 design according to Safety Review 2 设计遵照安全风险评估第二步所要求设计遵照安全风险评估第二步所要求installation ok installation ok 安装正确安装正确parameter settings ok parameter settings ok 参数设置无误参数设置无误

13、function of instruments (sensors and actuators) ok function of instruments (sensors and actuators) ok 仪表功能（传感器仪表功能（传感器, ,执行器）均正确无误执行器）均正确无误logic action correct logic action correct 逻辑动作正确逻辑动作正确Commissioning test of S.I.S. will be main task for CTA PM during Commissioning test of S.I.S. will be main

14、task for CTA PM during commissioning of missioning of plants.在装置调试期间，安全仪表系统的调试是电仪经理的主要任务在装置调试期间，安全仪表系统的调试是电仪经理的主要任务第17页/共22页2004-04-28 U.Schuenemann19Responsibilities 职责职责CTA manager CTACTA经理经理Plant Manager装置经装置经理理Project team项目项目组组prepare prepare procedures procedures for for commissionincommissioning testg test准备调试步骤准备调试步骤XXapprove approve procedure procedure for for commissionincommissioning testg test调试的批准手调试的批准手续续XX第18页/