Table of Content

20 February 2014, Volume 50 Issue 1

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Engineering Design and Standards

The existing problem and solution on sampling system of online GC on cracking device

2014, 50(1):  0-0. 

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Abstract: This paper introduces the role of chromatograph in cracking device, analyzes the reasons of gas chromatograph AR10803 measurement fluctuation in NO8 cracking furnace. And describes the improvement effect of sampling system made according to this phenomenon, finally puts forward improvement measures and suggestions for deepening the application of chromatograph analysis system.

InfoPlus21实时数据库系统安全性探讨

2014, 50(1):  0-0. 

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This article introduces InfoPlus.21 RTDB of the principle, system security architecture of InfoPlus.21 RTDB, It presents the issues and deficiency which should notice based on actually applied security architecture, and has discussion on the reasonable security architecture as well.

Application of wireless transmission technique in tank farm monitoring

2014, 50(1):  0-0. 

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The storage tank farm production plant has been showing the scale of large-scale, monitoring should seeking intelligent trends, with the continuous development of the petrochemical industry. For the difficulties monitoring temperature, level, pressure and other process parameters, the control system based on wireless transmission technology is used, which is for the monitoring system requirements and functionality, and combining the current rapid development of sensor technology, computer software and hardware technology, intelligent instrument technology. Refer to the application experience in a specific project, there is a brief description of the monitoring system architecture, system configuration, product selection and the realization of system communication and configuration method, to solve the cumbersome wiring problem in a conventional wired instrumentation construction process. The application shows that the use of wireless transmission technology in storage tank farm monitoring system makes the construction quickly and easy and has lower cost, less material and labor, shorter construction period, more convenient post-maintenance and a system with stability, real-time, security, reliability, greatly improved control accuracy and significant economic benefits.

Analysis of Redundancy Architecture of Sensor in Safety Instrumented System

2014, 50(1):  0-0. 

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This paper briefly describe the component of safety instrumented system. The relationship had been studied between Safety Integrity Level and probability of failure. The article analyses safety integrity level and reliability of sensor subsystem in different redundancy architecture to be used the theory of probability. The conclusion is that the different requirement of safety instrumented system needs different redundancy architecture for sensor in safety instrumented system.

The remote wireless data acquisition system based on SCADA

2014, 50(1):  0-0. 

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In recent years, with the development of Internet of things technology, remote data acquisition and transmission technology has been widely used in all walks of life. The remote data acquisition technology and GPRS wireless data transmission technology well combined, using the network more convenient, better communication quality mode to realize remote real-time information monitoring, using the micro controller to control the data acquisition, the GPRS terminal module for remote data transmission through GPRS network, realize the two-way data distributed data acquisition terminal and the monitoring Center Station transfer between Internet access function. According to the traditional data terminal many current industry needs remote network requirements, the study of remote data acquisition and transmission system based on SCADA, using the data transmission and Intemet access function of GPRS terminal module, the realization of data acquisition terminal and the monitoring center station between the bi-directional data transfer.

A brief analysis of network security solutions of industrial process control systems network security solutions

2014, 50(1):  0-0. 

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In the following article, we expound the austere position of Industry Control System’ virus protection. At the same time, we also briefly introduce the condition of refinery’ virus protection

Process Control Technology

Design of gas on-line calibration device

2014, 50(1):  0-0. 

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Abstract: This paper introduces a design of gas on-line calibration device based on standard meter method. The calibration system integrates with high-speed pulse counter interfaces of PLC, collects the real-time processing parameters, including temperature, pressure, flow rate signals, realizes fully automatic control of the online calibration and generation of reports. It also makes a preliminary analysis of the system and estimates the uncertainty of system, and presents the effective measures to ensure accuracy and reliability of the calibration results at the same time.

Information Technology

A digital X-ray imaging system for the nondestructive inspection of pipeline welds

2014, 50(1):  0-0. 

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Study on Inventory Optimization of Spare Parts in Large Petro-Chemical Company

2014, 50(1):  0-0. 

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Determining reasonable spare parts inventory in the large capital-intensive petro-chemical company, needs to consider not only operation effectiveness, but also affordable inventory capital of enterprise that occupies. An analytic model is studied based on actual history consumption data combining with failure overhaul interval for spare parts of petro-chemical company to determine the storage quota of spare parts，by modeling for consumption of the spare parts in large refine devices with the Normal Distribution model and Poison Distribution model in statistics. Finally this method proves to be effective through the actual engineering analysis.

Innovation and Pratice

The factors that affect differential method of steam measurement and countermeasures

2014, 50(1):  0-0. 

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Abstract: This article mainly introduced the problems that differential method of steam measurement, This article analyzed the main factors affecting steam measurement,. Base on inspecting and anglicizing, finding out the main factors that affect differential method of steam measurement. Combined with the work condition and put forward specific and implement, through demonstration, ultimately eliminating the breakdown.