Automation in Petro-Chemical Industry

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2015, 51(3): 0-0.

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Preventing Common cause and estimating the Beta factor

2015, 51(3): 0-0.

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Safety and Availability had improved a lot because of redundant structure. While produced common cause. learning it , preventing it and calculating it is important for SIS. This paper introduced common cause model, prevention and the method of beta estimating.

Design and Application of Safety Instrument Systems in Chloroacetic Acid Project

2015, 51(3): 0-0.

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It is very important that the Safety Instrument Systems（SIS）in preventing and reducing oil chemical factory or device process risk. It is directly affects the safe operation of the equipment that the SIS system designed reasonable or not. According to the detail identification of hazardous chemicals major hazard installations and the complete device node hazard and probability analysis which the main production process of an annual output of chloroacetic acid 50000t project, the paper have confirmed the Safety Integrity Level(SIL) of the liquid chlorine storage and vaporization device, analyzed and carried out the major control parameters. It have been designed the SIS system of the device and the complete interlock and control, and put into production operation. The SIS system have been running well in the actual production and ensuring safe production of the production device which represents the SIS system’s reliability, security and the characteristics in the production of the chloroacetic acid project.

Discussion on H2S detectors design in the Oil and gas engineering

2015, 51(3): 0-0.

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Abstract：About fixed H2S detectors layout and detection range in the oil and gas engineering is discussed in this paper. A solution is given with reference to the relevant domestic and international codes, standards which combined with the discussion.

Application of pneumatic on-off valve in the Emergency blow-down of the Hydrogenation reaction

2015, 51(3): 0-0.

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Hydrogenation reaction is in the environment that is high temperature and high pressure, and the hydrogen that is inflammable and explosive plays a vital role in the reaction. Thus security arrangement is very important. Emergency blow-down plays a very important part in the security system of the reaction. When the reaction is in dangerous situation such as catching fire, releasing, over temperature, or Recycle Hydrogen Compressor is not available, in order to slow down the reaction and make sure that temperature is in a controllable level, Emergency blow-down is necessary. In this article, pneumatic on-off valve type selecting, double solenoid valve function, and the control logic will be discussed.

Main Control Points of Domestic FCC Flue Gas De-dust & Desulfurization Technology

2015, 51(3): 0-0.

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Domestic self developed FCC flue gas de-dust & desulfurization integrated technology has built 10 sets of industrial plant by the end of 2014. To ensure new technology operating plant even running and always meeting discharge standard, this paper describes the process flow, main control parameters, main control loop, selection of main equipment and gauges, CEMS, important interlock protection and main points of operation instructions, to provide theoretical basis for plant manager and operator understand the process, master control requirements and ensure system long term stable operation.

Application of SCADA System in Myanmar-China Gas Pipeline Control Operation

2015, 51(3): 0-0.

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SCADA system is an automation system based on computer technology,which is used for control operation in China-Myanmar gas pipeline. The overview of China-Myanmar gas pipeline,the structure of the SCADA system components, configuration and control mode is introduced in this paper.The paper also introduces the running applications of the SCADA system, including the routine use and abnormal operating conditions,such as leakage, pipeline obstruction,communication outage, abnormal gas supply. Application results show that the SCADA system with high practical value can monitor and control pileline well, and improve production management level effectively and efficiently.

The Soft Measurement for Carbon Deposition of Platform Catalyst based on RBF in DCS

2015, 51(3): 0-0.

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A importance index to platform catalyst is the carbon deposition, it is significant to measure the carbon amount of platform catalyst. This paper discussed the soft measurement technology for carbon deposition of platform catalyst based on RBF neutral network through DCS. On the basic of simple introducing platform progress, it outlined soft measuring of platform catalyst, and then described the RBF neutral network theory and establishing of neutral model further. It also narrated programming in the DCS for the achievement of the soft measurement technology about carbon deposition of platform catalyst.

Ball mill pulverizing system of material level detection and control optimization

2015, 51(3): 0-0.

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The structure and operating characteristics of the ball mill pulverizing system, automatic control of the difficulties analyzed. Level measurement which is stable operation of the ball mill, optimal operation, the key economic operation for several current level measurement methods often used are described and analyzed to compare their advantages and disadvantages. Based on expert fuzzy intelligent system for optimal control of ball mill pulverizing system, a detailed description of its solutions and control theory, combined with the ball mill grinding technology automatically added, and ultimately to achieve automatic control, stable and reliable, energy-saving effect.

Design of electric-heated water bath temperature control system based on PLC and touch screen

2015, 51(3): 0-0.

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A set of electric-heated water bath temperature control system based on PLC and touch screen is designed. A Siemens S7-200 PLC is used as controller and A Smart 1000 touch panel is used as human machine interaction (HMI). Digit PID control algorithm is used, which has the auto-tuning ability and can be called by touch screen. Application shows the system has friendly interface and it is easy to operate. The auto-tuning control result turns to be good, which has a high degree of accuracy and can satisfy the temperature control need of water bath for chemical process experiments.

Temperature and pressure correction applied in Power plant drum level control

2015, 51(3): 0-0.

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Drum level control is the most important control loop in power plant. Drum level can be detected by differential pressure level transmitter, electric contact level meter, and some other detection technology which is suitable for this condition. Each method has its own advantages, the differential pressure level transmitter is a method of specification for power design required, but the differential pressure detecting has the problem of measurement uncertainty which caused by density changing, especially when false water level appeared,we don’t make temperature and pressure compensation, measurement will be a serious deviation from the actual value. In order to avoid this kind of situation, level with pressure and temperature revise and three-impulses control method cooperate with each other to realize stable control. In this paper, through the investigate of a dynamic operation situation of certain power plant, it can be seen that drum level control is relatively stable and controllable.

Application of wireless communication technology in oxygen pressure acid leaching process.

2015, 51(3): 0-0.

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The wireless communication technology used in DCS system of 140000 t/a oxygen pressure leaching system engineering at Hulun Beir Chihong Mining Co. Ltd, which is the hotspot of automation technology development for process industry. Introduced the WirelessHART wireless instrument usege and detailed configuration method, summarizes the field application and the characteristics of wireless communication technology. Wireless communication technology to solve the traditional wiring problems, convenient configuration and convenient maintenance, the perfect combination with DCS system, shorten the period of construction so that the advantages of this technology has broad application prospects.

the development about information management system of equipment maintenance

2015, 51(3): 0-0.

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Through the investigation for the status of equipment repair management of oil transportation enterprise，Put forward ideas to promote scientific equipment maintenance management by information means. The methods, steps and logic analysis measures of developing the information management system of equipment maintenance are introduced carefully. The system has perfect functions and friendly man-machine interface, After the system running, to enhance effectively the maintenance information management level, It’s also referential to the intelligent construction for long distance crude oil pipeline.

Research on the Reliability Assessment of 4 Types of Classic Solenoid Valve Combinations

2015, 51(3): 0-0.

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The safety and of 4 classic solenoid valve configurations, namely 1oo1, 1oo2, 2oo2 and hybrid solenoid, were studied in order to evaluate the feasibility in application. The logical structure and failure modes of each configuration were discussed and analyzed. Taking advantage of Markov based reliability model, the Average Probability of Failure on Demand (PFDavg) and Mean Time To Failure Spurious (MTTFs) of these configurations were studied and compared in this paper. By carefully comparison and analysis, the characteristics and applicability of each configuration were discussed. It shows that 1oo2 solenoid valve can provide best safety performance and worst anti-spurious trip capability, while hybrid solenoids can provide both low nuisance trip and acceptable safety performance. The recommended applications of these structures were also discussed in this paper which is benefit for the selection of configuration emergency valves.

The review of acoustic emission detection method and key technology about natural pipeline valve leakage

2015, 51(3): 0-0.

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The application of acoustic emission technique is currently the most promising way for natural gas pipeline valve leakage detection. It can effectively identify the leakage as well as the internal leakage flow rate. In this paper, the acoustic emission testing method is reviewed, and the key technical problems of leak detection in pipeline valve are pointed out. Leakage acoustic emission characteristics and mechanism of vale are analyzed, de- noising, feature parameter extraction of leakage acoustic emission and leakage flow prediction problems are described emphatically, On the basis of above research, some considerations and suggestions are proposed to improve the leakage flow prediction accuracy sued acoustic emission technology.

Research on Ethylene Glycol Liquid Level Measurement Methods in Jacket Leg Storage of Offshore Platform

2015, 51(3): 0-0.

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In the South China Sea deepwater natural gas development project, jacket legs are designed as a container for storage of MEG (ethylene glycol) solution. In order to solve the measurement problem, through the principle, capability and contrast characteristics of all kinds of liquid level transmitter, combined with the actual work characteristic of liquid level instrument selection, adopted into static pressure liquid level transmitter. At the same time, the implementation of the actual situation according to the project, provide installation suggestions into static pressure liquid level transmitter.

Application of ESD in ChengDao Production Platform

2015, 51(3): 0-0.

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Reformation Design of Online Monitoring for the HydrogenIn Double-ring-canal Reactor of Polypropylene Device

2015, 51(3): 0-0.

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Abstract: In 300,000 t/a Polypropylene (PP) device of Lanzhou Petrochemical Company, all kinds of PP’s products are made from double-ring-canal reactor. In the reactor, what PP’s product can be made is depended on the content of hydrogen. Now, the content of hydrogen is detected by chromatographic analyzer, and double-ring-canal reactor uses the same analyzer. It causes the obtainable data is delayed and higher price PP’s products cannot be made due to controlling inaccurately. Two programs are designed in order to solve this problem. One is the program of single circuit; the other is the program of double circuits. Through the comparison of the two programs, in the first solution of single circuit，both of the chromatographic analyzers work well. It is better than the program of double circuits, when one of the chromatographic analyzers goes wrong. Therefore, the first solution of single circuit is carried out and has demonstrated its effectiveness.

THE S_ZORB PROJECT PRACTICE— the program control valve fault analysis

2015, 51(3): 0-0.

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The S_ZORB is important project to product environment protect gasoline, the program control valve fault were mostly trouble. Analyze the problems and solution.

Measurement of McWiLL oil wells, monitoring system design based on

2015, 51(3): 0-0.

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On the basis of the third?oil production plant of Daqing?oilfield production practice?and management?present situation,?proposed the implementation of?the design scheme of the?oilwells,?production?operation parameters?measurement?process detection and?control based on McWiLL?technology.?This paper?firstly compares the?advantages and disadvantages of existing?information transmission?technology in the oilfield,?according to the actual working conditions?of three?factory,?select the McWiLL technology;?then,?the wireless?transmission network construction?scheme based on McWiLL technology?is presented,?mainly collected from?control layer,?data transport layer,?production?monitoring and management?layer is composed of three parts;?then,?respectively?measurement of?oil well?data acquisition and control system,?data acquisition?and control system,?production?monitoring and management system?is designed and implemented;?finally?the application effect?is analyzed.

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