Dcs Used In The Process Of Urea Of Big Grain Of 300 Thousand Tons/Year

This text the synopsis introduced DCS development history first, gathering to spread the control system(DCS) since 1975 publish, experiencing to near to for 30 years. It from only have in the past applied develop in a handful of control systems of large business enterprises to electric power, petroleum, chemical engineering, metallurgy, building materials, make a description to the development and present condition of the domestic DCS also, the domestic DCS experience from have no to have, since the childhood, from weak arrive strong process. The reform opens initial stage, nation for satisfying domestic to need urgently, ushered in several 100 sets of DCSs from the abroad to equip petrochemical, metallurgy, electric power, turn fatty with light work etc. profession. Insist in the meantime renew through own efforts, independent development with usher in a technique to combine together of policy. Pass to usher in digest, absorb or independence development, is gradually Chinese gather to spread control system ownly. The domestic DCS develops to compete completely in the top of the small system now of real strenght. Aim at industry 300,000 the tons/years urea the big grain build a grain of device, designing system to install the project, the control project and to lock a project. Combine the system implement process, carried on a processing to some engineering problems.Chapter 2 beginning produces device the craft process to carry on the analysis of the system to the urea, elaborating urea a lord device the craft process and big grain process JIAN3 SHU4.Aim at the urea lord equips the craft process and big grain process to create a system diagram. The urea lord equips an adoption the carbon dioxide vapor to lift the method urea production craft, its craft process mainly includes: the carbon dioxide compressor with take off hydrogen, the liquid ammonia to rise to press, synthesize to lift, circulate, evaporate to build a grain, the product贮to save with vapor with the packing and solve to absorb to solve with water etc. work preface.Urea craft flow chart frameChapter 3 design that mainly elaborates the control system and project. This DCS control system ( SmartPro ) installs to have two control station ( 10# control stations, 11# control station)s of redundancies,4 sets of operator station(OP1,OP2,OP3,OP4), 1 adjusts one degree station (OP5),1 long range surveillance station (OP6). For the sake of easy to management with connect line, stand two control to use separately, 10# control station useds for a main frame of urea production device; 11# control station useds for big grain to build a grain of production device.4 operator station OP1s used for a main frame solution to absorb and the water solution process; The OPS useds for a main frame to evaporate process; The OP4 useds for big grain to build a grain of process. Can choose an any operator station and make engineer's station. The system has an in proper order control of strong feedback control, logic with various operation vividly, carry out a forerunner of complicated control strategy. Designed NH3/CO2 controls in the year produce 300,000 tons big grain urea CO2 vaporses lift the method craft the device, the urea burden control, the oxygen content O2 control, the spirit exhaust a control etc.25 sets of typical model complications control system.Chapter 4 design and the realization that elaborates the lock control system. The urea equips the lock system all completion from the calculator software set, having the stronger and dependable, accuracy and connection, taking to occupy past memory and logic judgment, the intelligence turn function, it can replace operation personnel to want to carry on of a great deal of operation with urgent trouble processing, carry out intelligence to turn of trouble true false argue and don't categorize a parking with Class, avoid a mistake a parking and park the car of the extension turn with park the car of the disturbance and the error. The urea equips a main lock, such as form,:Ordinal number The lock name1 The CO2 compressors drive lock system2 The CO2 compressors circulates the lock system3 Assist the oil pump lock system4 The congealed liquid pump lock system5 Build the grain spray a head lock system6 The water solution machine temperature lock system7 The water solution analyzes the lock system little by little8 The high pressure ammonia pump lock system9 The high pressure A pump lock system10Urea the big grain equip the lock system11Jet the machine liquid ammonia cuts off the valve lock system12The XPV-2202 lock system13The liquid descends the pump lock projectChapter 5 mainly elaborates the engineering implement process. The implement of this DCS item in fact from before signing contract star, with benefic technical personnel according to mark the technique request of the book, do a technique project. After the medium mark, supply and demand both parties'technical personnel carries on a more thorough research to the technique project further, appointed item representative director, the assurance item start and the completion time.(work period)The item is after start carry out process mostly as follows: 1) The item gathers engineering of spread the control system to turn a design2) The system is integrated3) The system set4) The factory adjust to try5) The gearing of the spot equipments6) The monotone of the system and the of the system and the spot gauge adjust7) The hurl anticipates to try movement8) The system check before acceptanceControl the system has already succeeded to throw a luck and stabilize movement.