Table of Content

20 January 2023, Volume 59 Issue 1

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Engineering Design and Standards

The Status and Improvement of Lightning Fire Prevention Technology for Large Floating Roof Storage Tanks

2023, 59(1):  0-0. 

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With the development trend of large-scale tank design and construction, it is of great practical significance to ensure the safe operation of tanks and prevent lightning fire accidents. For large floating roof storage tank, special attention shall be paid to prevent lightning fire of sealing device. Combined with several typical tank fire accidents, the reasons of seal device failure in tank design, construction and operation and maintenance are analyzed. The present situation and existing problems of domestic storage tank lightning protection technology are expounded from the aspects of second sealing device, electrical connection of facilities, lightning protection and grounding detection. The design concept and application of new oil&gas free sealing device, active nitrogen protection system and lightning warning system for storage tanks are introduced. From the aspects of design, construction, sealing device form, tank lightning fire fighting and tank safety management mode, the measures and suggestions to enhance the ability of tank to prevent lightning fire risk are put forward.

Discussion on periodic test of SIS

2023, 59(1):  0-0. 

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This paper introduces the requirements of domestic specifications, safety supervision documents, IEC61511 and ISA 84.00.03 for SIS periodic test; Introduce predictive maintenance; The test contents and methods of the environmental inspection of the control room and the cabinet room, the power supply test of the system, the grounding test of the system, the hardware inspection of the cabinet, the hardware inspection of the engineer station (operator station, etc.), the software inspection of the engineer station (operator station, etc.), the AI card accuracy test, the on-line and off-line test of the field instrument valve, and the SIF loop test are introduced respectively; Summarize the existing problems of SIS periodic test.

Safty Design Of Emergency Shut-off Valve in Tank Farm

2023, 59(1):  0-0. 

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With the continuous development of China's petrochemical industry, the corresponding storage tank farms are also increasing. Most of the storage fluid in the petrochemical tank farms are toxic and combustible fluid, and the varieties of hazardous chemicals are relatively dense, which is easy to become a major hazard source. According to the identification results of HAZOP assessment and LOPA analysis on the risks of the tank farm, combined with the safety management documents and design specifications, taking the reconstruction project of the petrochemical tank farm in service as an example, the design of the emergency shut-off valve under various complex conditions of the old tank farm is discussed, which provides a reference for the design of the emergency shut-off valve of similar tank farm safety projects.

Discussion on Fire Alarm and Fire Fighting Joint Control of Crude Oil Processing Station

2023, 59(1):  0-0. 

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Method Discussion Of Documentation and Rationalization

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Abstract：Alarm rationalization, optimization and priority determination are the key stages that differ from the traditional alarm system design. Comprehensively analyze and sort out the factory alarm system, explore the rationality of the alarm settings, and direct operators to deal with nuisance alarms, invalid alarms and repeated alarms. Systematically alarm documentation and rationalization process are under the guidance of ISA18.2 to analysis Causes, consequences and actions. It focuses on the introduction of the alarm documentation and rationalization workflow, and discusses the optimized method for the factory to conduct alarm documentation and rationalization process.

Innovation and Practice

Remote automatic control method of natural gas pipeline valve based on PID algorithm

2023, 59(1):  0-0. 

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Due to the poor control effect of traditional methods in the application of remote automatic control of natural gas pipeline valves, the internal leakage of natural gas pipeline valves still occurs. Therefore, a remote automatic control method of natural gas pipeline valves based on PID algorithm is proposed. The acoustic wave sensor is used to obtain the acoustic emission signal of the natural gas pipeline valve, and its amplification, translation and other transformation processing are carried out. The wavelet packet decomposition method is used to analyze the acoustic emission signal of the pipeline valve, extract the internal leakage characteristics of the pipeline valve, identify the natural gas pipeline valve with abnormal internal leakage, calculate the state error of the natural gas pipeline valve with PID algorithm, and control the opening and closing of the natural gas pipeline valve with abnormal internal leakage according to the set PID rules. It is proved by experiments that the maximum internal leakage of natural gas pipeline valve by using the design method is only 0.32l, which shows that the remote automatic control effect of natural gas pipeline valve by using this method is good and has a good application prospect.

Application of synthetic gas compressor integrated control

2023, 59(1):  0-0. 

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Synthetic gas compressor is the key equipment of chemical fertilizer plant. In view of the practical application, there are a series of problems such as unstable pressure control, unclear partial interlocking logic conditions, and failure cause can not be accurately determined in case of abnormal conditions. The interference and influence between its control systems are described. A new decoupling method is developed to integrate the inlet pressure performance control, turbine speed control, compressor anti surge control and compressor outlet pressure control of the synthesis gas compressor into a comprehensive control, realizing the control goal of automatic, stable and efficient operation of the synthesis gas compressor.

Process and Technology

Performance Control Optimization of Ethylene Cracking Gas Compressor

2023, 59(1):  0-0. 

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Research on stepless regualtion technology of gas volume of reciprocating compressor

2023, 59(1):  0-0. 

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Bypass regulation is a common way to regulate the displacement of reciprocating compressor, but the reciprocating compressor is in full load operation during the regulation process, which causes waste of resources under low flow conditions. Aiming at this problem, a gas flow stepless regulation technology based on the principle of saving labor by backflow of top opening gas valve is introduced, as well as the composition and working principle of the gas flow stepless regulation system using this technology. The technology is deeply studied through AMSim system simulation nuclear test. The simulation and test results show that the technology has significant energy saving effect and can ensure the safe and stable operation of the device.

Advanced control lifting and optimization of atmospheric and vacuum distillation unit

2023, 59(1):  0-0. 

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This paper introduces the development and innovation of the advanced control of atmospheric and vacuum distillation unit in terms of industrial control safety, device optimization, precise control, one button operation of automatic lifting and lowering volume, intelligent display of human-machine operation interface, etc. to meet the needs of online real-time optimization system construction and self promotion, which improves the quality and performance of advanced control, tamps the basic platform of online real-time optimization, and brings continuous economic benefits to the enterprise.

A Definition Method of Proof Test Coverage Rate and Its Markov Verification

2023, 59(1):  0-0. 

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Based on the FMEDA analysis, a definition method of proof test coverage is proposed in this paper, and measures that can improve proof test coverage is also proposed. Then, based on single-card-triple system, Markov model is modelled to prove that the impact of the increase in proof test coverage on the PFDavg of SIS. The results show that the definition method of the proof test coverage is reasonable and effective. The measures proposed based on this definition method can effectively improve theproof test coverage. The simulation results show that increasing the proof test coverage and reasonably increasing the proof test frequency can greatly reduced the PFDavg of SIS during its using time.

Research and Application of Intelligent Decision making Technology for Water Plant of Refining and Chemical Enterprises

2023, 59(1):  0-0. 

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In combination with the overall requirements of refining and chemical enterprise to improve water management, and in view of the operating characteristics of the water plant system of refining and chemical enterprises, equipment fault diagnosis and life prediction technology, intelligent laboratory analysis technology, indicator analysis and evaluation technology, comprehensive health evaluation technology, global optimization technology, prediction and early warning technology and intelligent decision-making system of the demonstration water plant are developed, A complete set of technologies for intelligent decision-making of refinery enterprise model water field has been formed to comprehensively promote the application of intelligent decision-making of water field. After implementation and application, this technology has effectively realized the centralized management and control, performance analysis, health evaluation, prediction and early warning and overall optimization of enterprise water field, helped the enterprise to save energy, reduce emissions, reduce costs and increase efficiency, and comprehensively improved the operation management level and service guarantee capability of the water field.

Instrument and Meter

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2023, 59(1):  0-0. 

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Selection and application of flue gas oxygen analyzer for natural gas purification unit

2023, 59(1):  0-0. 

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Abstract：This paper briefly describes the role and importance of flue gas oxygen analyzer in flue gas analysis of natural gas purification device, expounds the detection principle of gas oxygen analyzer in detail, puts forward the problems existing in the selection of flue gas oxygen analyzer, and makes in-depth discussion and Analysis on how to select it. Finally, the application of electrochemical oxygen analyzer in flue gas monitoring is introduced.

Study on mass measurement of dimethyl ether in spherical tank

2023, 59(1):  0-0. 

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DME is an important industrial raw material, and the measurement of its product quality is extremely important for the statistical analysis of production. At the same time, because DME is volatile, and temperature and pressure have a great influence on the density of DME, it is impossible to obtain the DME in real time. The density of methyl ether, in this paper, the radar level gauge is used to measure the liquid level, the electric remote level gauge is used to measure the differential pressure value, and the density of dimethyl ether is calculated in real time. get its quality. Finally, the quality of dimethyl ether in the spherical tank is calculated, which provides the basis for the business accounting and production operation of the production system.

Study On Carbon Dioxide Gas Detection

SUN Jinling

2023, 59(1):  0-0. 

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Many CCUS（Carbon Capture, Utilization and Storage）projects are being constracted to peak carbon dioxide emissions before 2030 and achieve carbon neutrality before 2060. The toxicity of carbon dioxide is analysed and necessity of carbon dioxide gas detection is conclused. The arrangement method of carbon dioxide gas detector, the detection principle of infrared carbon dioxide gas detector and comprasion for different inner structures are illustrated detailedly.

Intelligentization and Information Technology

Development of Integrated Management and Control Software for Oil and Gas Field Production based on ProMACE and its Application in some Gas Field

2023, 59(1):  0-0. 

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The oil and gas field production area has generally a large span and a bad environment, so there is an urgent need for technology of information and intellectualization. The digital transformation objectives of oil and gas enterprises are introduced in this paper. Integrated Management and Control Software for Oil and Gas Field Production based on ProMACE of the industrial Internet platform is also detailed described, with its system architecture and functional architecture. It shows from its application effect that the software can effectively improve gas field operation benefit, reduce labor intensity, and improve work efficiency and production safety. Its development and application processes provide a reference mode and experience in the digital transformation of oil and gas fields.

Calm Thinking under the Tide of Intelligent Factory Construction in Petrochemical Industry

2023, 59(1):  0-0. 

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关键词：石油化工；流程工业；智能工厂；数字化交付 Calm Thinking under the Tide of Intelligent Factory Construction in Petrochemical Industry Rong Yandong1，Li Hong1，Tian Gang2 (1.SYNFUELS CHINA ENGINEERING CO., LTD. BeiJing,101407,China； 2.INNER MONGOLIA YITAI CTO CO., LTD. Ordos, Inner Mongolia ,01700，China) Abstracts：Supported by new intelligent technology, "intelligent factory " is the development and improvement of computer integrated manufacturing theory in the new era. In response to the booming " intelligent factory " construction wave, the petroleum and chemical industries have gratifying theoretical research and practical results in all aspects, but there are also many defects. This paper analyzes the concept of " intelligent factory " in detail, introduces the technical implementation of " intelligent factory " in China and the problems faced in the construction of " intelligent factory ". Further in-depth discussion on the question of "what economic benefits can smart factories bring to owners".

Safety and Environment Protection

Application of protection layer identification improvement in SIL grading of oil and gas station process

2023, 59(1):  0-0. 

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SIL Assessment of Safety Instrumented System and Application Research of LOPA Method

2023, 59(1):  0-0. 

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SIL assessment of safety instrumented function loop is the design base of the safety instrumented system, SIL assessment methods were clearly defined in IEC 61511 Part 3. The safety layer matrix, modified risk graph and layer of protection analysis (LOPA) are the most often using methods, the comparison research for these methods were done and the advantages of LOPA were summarized. Based on the SIL assessment of typical safety function loop on one offshore oil production platform, the calculation and assessment procedure of LOPA was described in this article, and it provided reference for SIL assessment using LOPA for other offshore safety instrumented system.