Table of Content

20 October 2015, Volume 51 Issue 5

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Development and Commentary

Application analysis of image flame detector in the field of coal chemical industry

2015, 51(5):  0-0. 

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This paper mainly introduced the characteristics of the image flame detector and detailed analyzed the application situation and prospects in the field of coal chemical industry. The article first brief introduce the history of development, technology development phase and the standers which made in China or abroad of the image flame detector .Then by chart formulated sensitivity in resolution and all kinds of detection parameters of this kind of detector are superior to other devices under the background of the current technology .Wide use range, the characteristics of fire and fewer false positives make it more widely applied in industrial environment conditions. In this paper, even according to the factors which caused fire in industrial environment, we analyzed and compared the effectiveness of several detection methods. Conclusion: The image flame detector flame detector can be faster, more accurate, effectively stop the spread of fire and reduce the occurrence of major accidents in the field of coal chemical industry

Tank Inventory Metering and Measurement Instrument System Engineering Design Strategy For Refinery Oil Tank Farm

2015, 51(5):  0-0. 

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Abstract：The major oil tank inventory metering and measurement design strategies used for petrochemical oil refinery Tank Farm be described in the article. According to processing requirement, oil tanks are classified in atmospheric tank, low pressure tank and pressure tank, also metering tank and non-metering tank. Tank inventory metering and measurement Instrument design schemes should be defined based on above classification. Suitable types of instrument selection and alarm setting are Tank Inventory Metering and Measurement System’s design basis. The common methods for oil tank inventory metering such as Hybrid Tank Measurement System, Volumetric method, Hydrostatic Tank Gauging are narrated, and compare differences among of them. The article enumerated successful and practice engineering design schemes and methods.

Engineering Design and Standards

GE coal slurry gasification Lockhopper sequence and lockhopper valve selection

2015, 51(5):  0-0. 

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Lockhopper system plays a crucial role for the stable running of coal gasification plant. According to the requirements of the process，the Lockhopper cycle design is briefly described. The selection of lockhopper valve with harsh conditions is discussed primarily. Based on the actual project，the reference for instrument selection of similar process plant is provided

Design of Chemical Instrumentation Wireless Searching system Based on Bluetooth Technology

2015, 51(5):  0-0. 

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In order to solve the problems when checking chemical instrumentations in a complex environment, the instrumentation wireless searching system was designed by using C8051F930 as the control core. Acousto-optic alarm was achieved by phone-controlled searching device to locate the instrumentation. The system consists of main control chip, Bluetooth module and peripheral circuit, and the software part includes app and searching device control software. The system communicates with the searching devices on instrumentations via app based on Bluetooth module, and drives the buzzer sounding or LED flashing to help the staff find the instrumentation he wants to check. The experiment proves that the system normal working time is more than 6 months, and provides a feasible method for checking instrumentations more efficiently and accurately.

Measurement Principle of Ammonia Nitrogen Analyzer and Its Application in Sewage Disposal of Chemical Processing of Coal

2015, 51(5):  0-0. 

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Chemical processing of coal is with characteristic of high ammonia nitrogen, the key factor to reach the standard of ammonia nitrogen treatment in sewage is accurate measurement. The measurement principle of ammonia nitrogen analyzer is discussed, merits and faults, application range of two different measuring principle of ammonia nitrogen analyzers are compared. The factors should be considered in engineering design of ammonia nitrogen analyzer are introduced in detail. Several application cases of ammonia nitrogen analyzer in sewage disposal plant of Chemical Processing of Coal are introduced.

Research on the Advancement of Russia Oil Stations Operation Technical Standards

2015, 51(5):  0-0. 

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With the political value, it was important to guarantee safety operation of Chinese and Russia crude oil pipeline. Domestic scholars already carried out the research on Russia pipeline standard, with attaching great importance to process operation and pressure testing and pipeline pigging of the main pipeline. The paper selected Russia oil station operation technical standards, and compared with domestic relative standards. The advancement of Russia standards were expounded in detail, such as preferred pressure regulating systems for pressure protection model, and process pipeline inspection period determination principle, and pump operation conditions and service limit assessment based on pump vibration inspection, pump emergency shutdown based on pipeline emergency conditions and excessive pump operation parameter, and diesel generator to start fire pump technology, station fire systems inspection period, and the logical interlock relationship between vent systems and combustible gas concentration and pump shutdown.Finally, by means of learning Russia standards, recommendations are made to raise China oil station operation and management level.

Design and Study for Human Machine Interface of Safety Istrumented System in Petrochemical Industry

2015, 51(5):  0-0. 

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The application of safety instrumented system in petrochemical industry has been increasing rapidly since the completion and improvement of industry legal system. As the distribution of “Code for design of safety instrumented system in petrochemical engineering”, the design process of safety instrumented system is regulated further. However, the importance of human machine interface has been paid less attention while people focus more on sensor, final element and logic solver in design process and do not understand the code thoroughly, which lead to less reliability of safety instrumented system. In this paper, the author analyzes the function of main human machine interface in operator workstations, maintenance of override switch, operational override switch, emergency shut-down button, reset push button, alarm indicator and auxiliary consoles in safety instrumented system and also analyze the existing problems in detail. Moreover, the recommended solution is put forward, which has been checked by installation, production and operation turns out to be reliable. It can be used as reference for designer in petrochemical industry.

Process Control Technology

Designing fractional-order model reference adaptive Rate using Lyapunov theoretical

2015, 51(5):  0-0. 

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Introducing the basic structure and control theory of model reference adaptive control. Using the system's input-output method to design fractional controller, and for linear systems with unknown parameters, by constructing a new Lyapunov function that containing Fractional Calculus options. Designed a new adaptive rate, and prove the design of an adaptive rate is useful.

Based on CFD buried town medium pressure gas pipeline leakage

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The Desulfurization System Prediction with BP Neural Network Model

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Analysis of the ammonia compressor control scheme，And implemented in the DCS system

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the PLC control system of the ammonia compressor was configured by the compressor manufacturer independent. It is bring a lot of inconvenience in the compressor commissioning, use, and problem analysis, because of the PLC control scheme not to open for user. Take the PLC control scheme to the DCS run can well solve the problem.

The research and application of process industry alarm management system

2015, 51(5):  0-0. 

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Abstract: In the process of industrial production, the alarm flooding caused the operator oversight and wrong operation, causing casualties, property damage, such as dire consequences, in order to enhance the security of industrial production process, the alarm flooding is a key problem. This article will through the dynamic fuzzy clustering algorithm is adopted to process industry alarm system for reasonable grouping, and K- means algorithm is used to determine the clustering center and on the alarm level, combined with the process to optimize industrial flue gas desulfurization system of alarm information and verify the validity and practicability of the optimization algorithm, so as to realize the purpose of reduce alarm rate.

Information Technology

Research and design of water source well management system

2015, 51(5):  0-0. 

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Abstract：For the?quantity of?water wells?in Changqing Oilfield?is numerous, decentralized management,?management?costs are too high,?we develop the water source well management system and do the digital remould. Realize the?management and?analysis?of real-time data,?static data,?refined management mode that the?management?level and the module of system?integration and unify. Keyword: water source well; system; module; Interface?function

Anomaly Detection Management System for Lockhopper of S Zorb Unit

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An Anomaly Detection Management system has been developed for Lockhopper ofS Zorb unit to achieve optimal and safe operation.By using real-time process data from LMS system, the system provides a lot of information on process abnormal conditions and also many useful tool to get early detection on many equipment problems. Data processing technologies, fault-diagnosis technology, and process modeling technique are applied in the system. Better control of S Zorb unit, better equipment up-time were achieved.

Oil and gas pipeline automation station control system maintenance and management

2015, 51(5):  0-0. 

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The station control system as an important part of oil and gas pipeline automation system，has the essential role。Therefore，the maintenance and management of it is that we each care and concern of professional and technical personnel。In this paper，combining the reality of the station control system maintenance requirements and the use of the work task documents system， based on the work task documents system，maintenance database set up ，to further improve maintenance quality is associated with subsequent work。

Instrument and Meter

Study of Actual Natural Gas Flow Calibration Primary Standard Device Heating System

2015, 51(5):  0-0. 

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Actual natural gas flow calibration primary standard device has high requirement on temperature of the gas source. In order to meet calibration demand, gas should be heated before pressure dropped to keep temperature stability. Initially, heat loads at calibration station are calculated. Subsequently, several common used heating methods in natural gas industry are introduced and compared in this article.

Application of Probe Type Laser O2 Analyzer

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O2 level detection from mixed gas is important in many chemical production processes. Comparing with conventional O2 analyzers, a new probe type laser O2 analyzer is introduced. The measuring principle and instrument structure are described in detail. The instrument characteristics and advantages are specified. By introducing a chemical project, the typical application of analyzer is discussed.

Innovation and Pratice

Problem Caused by Control Valve Fail Acting Mode and Solution

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Control valve fail acting mode is always not understood totally. If The fail acting mode unmatch the configuration, it will cause potential safety problem easily, especially in complicated control loop. This article provide one simple and practical solution, which can solve the problem completely.

Reliability design of UPS redundant power supply system

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This article from the practical application of DCS control system, through the comparison and analysis of several commonly used UPS redundant configuration systems, and combining the actual usage of UPS in the process of chemical production, to improve the reliability of UPS power supply system, according to DCS system configuration in different projects, a UPS power supply in the form of redundancy configuration is proposed