Table of Content

20 May 2025, Volume 61 Issue 3

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Instrument and Meter

Intelligent transformation and application of wellhead throttling device based on PLC

2025, 61(3):  0-0. 

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Research and Application of Measurement Technology for Intelligent Calibration System of Fuel Dispenser

2025, 61(3):  0-0. 

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This article designs an automatic calibration system for fuel dispensers, which consists of two parts: calibration equipment and control network. The purpose of the system is to change the current situation of fuel dispenser calibration work in finished oil sales enterprises, and the main technical parameters of calibration include errors and repeatability. The system has the functions of simple operation, accurate results, ensuring data security, preventing data fraud, and preventing the theft of calibrated oil products used. The article elaborates on the overall design concept of the system, the technical requirements of each part, and the implementation methods of the technical requirements, demonstrating the actual functions of each part of the system and comparing the accuracy of measurements taken by different terminal devices. Finally, the usage of the system was described, indicating that it can effectively shorten the calibration work time, reduce the calibration work intensity, complete the calculation of calibration results, upload and sort data information, and update the calibration work progress in real time, and provide warning s based on the calibration results.

Research on Intelligent Fault Detection of Instrument Automation Equipment in Petrochemical Enterprises

2025, 61(3):  0-0. 

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Research on on-line monitoring of long-distance oil pipeline leakage based on ultrasonic flow method

2025, 61(3):  0-0. 

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Application of Oxygen Control Valves in Air Separation Unit

2025, 61(3):  0-0. 

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Oxygen is dangerous process medium, it is very easy to occur explosive accidents if improperly design, installation and operation is adopted. Oxygen outline pipe is the key pipeline of air separation plant, the delivery and vent control valve affect the safety and steadily operation of the plant. Attention shall be taken to selection of the control valve reasonably , restrict flow rate inside the valve body, selection of certified lubricating grease and non-metallic parts. Meanwhile must pay attention to oxygen clean, packaging, storage, transportation and installation of control valve, which is necessary condition to ensure that control valve can be worked stably.

Intelligentization and Information Technology

Ethernet-APL Technology and Its Application in Pharmaceutical Industry

2025, 61(3):  0-0. 

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Based on the analysis of the current automation scheme and demand of the pharmaceutical industry, combined with the progressiveness and development status of Ethernet APL technology, this paper introduces the successful application of SUPCON OMC System, which fully support Ethernet-APL in Tianxin Pharmaceutical, and expounds the application value of Ethernet-APL for the pharmaceutical industry, includes reducing the construction cost and improving the digital intelligence, and expounds the reliability and stability of the OMC system.

Development and Commentary

LNG接收站自动化

2025, 61(3):  0-0. 

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Innovation and Practice

Thoughts on Countermeasures to Improve the Reliability of Domestic ControlValves in Chinese

2025, 61(3):  0-0. 

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Abstract The control valve, as an important equipment for regulating medium flow, pressure, temperature, liquid level and other parameters in the petrochemical plant, plays a vital role in the oil refining industry. Its operation reliability directly affects the safety and stability of the operation of the refining plant. This paper analyzes the typical faults of the control valve, discusses the ways to improve the reliability of the control valve, and puts forward prospects for the application of new technology in the control valve.

Research on Feedback of S Zorb Lock Hopper Valve Position Switch and Valve Jamming Problem

2025, 61(3):  0-0. 

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Abstract: The operation status of the program-controlled valve in the S Zorb device's locking hopper system will directly affect the continuity and stability of the process production. Due to valve jamming and feedback issues, the sequential control system frequently malfunctions, leading to production interruptions and affecting desulfurization efficiency and product quality. Analyzing the causes of valve position switch failure and jamming, accurately identifying the occurrence of jamming in programmable valves through angular velocity sensors, classifying the degree of valve jamming, predicting the remaining service life of valves, achieving predictive maintenance, and exploring methods for predicting the remaining service life of valves.

Application and Research of Asphalt Quantitative Loading System

2025, 61(3):  0-0. 

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The asphalt loading process of a certain company adopts the traditional manual filling and truck scale measurement settlement method，which leads to overloading and underloading during the loading process，and causes harm to the health of the filling personnel。This article introduces an asphalt quantitative loading system，as well as its equipment composition and system network architecture。The system uses a high-temperature Coriolis mass flowmeter and electric tracing to control the temperature of the medium。Advanced digital communication technology is used to monitor the entire process of the loading equipment，which can timely detect and eliminate the measurement impact of process or equipment abnormalities on the flowmeter，meet the operating conditions for accurate measurement of the flowmeter，and improve the safety，stability，and measurement reliability of the quantitative loading system。

Interconnection Modification of Air system on Offshore Oil and Gas Drilling Platforms

2025, 61(3):  0-0. 

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Compressed air, serving as a vital power source, is widely utilized in the petrochemical industry. On a certain offshore oil and gas drilling platform, three separate air systems—production plant air, drilling plant air, and nitrogen production plant air—are established based on varying air demands, with two air compressors in each system. This self-initiated renovation accomplished the breakthrough in interconnecting the air systems. By adding process pipelines, optimizing communication methods, and configuring joint control programs, the air pipeline networks of the three systems were interconnected, and the six air compressors were linked together. After the renovation, the stability of the air systems was significantly enhanced, and the overall energy consumption of the equipment was reduced.

Safety and Environment Protection

Process risk assessment of station and yard based on HAZOP and dynamic simulation

2025, 61(3):  0-0. 

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Abstract: Aiming at the problems such as bias ambiguity in traditional HAZOP and ineffective verification of safety measures, HYSYS software was used to conduct steady-state modeling, result verification and dynamic simulation with the associated gas light hydrocarbon recovery process as the research object, and the influence of the deviation of "excessive liquid level of reboiler in deethane tower" on system parameters was analyzed. The specific value of deviation from normal conditions is determined, and the effectiveness of safety measures is verified. Finally, the severity level of consequences is revised according to the simulation results. The results show that too large opening of the inlet control valve of the cryogenic separator and too small opening of the bottom control valve of the deethane tower will cause the risk of overpressure of the tank, the flooded tower and the equipment, and the failure of the heavy contact tower bottom pump will not cause serious accidents. The evaluation results based on dynamic simulation only need to add the level and pressure control loop to achieve safe and smooth operation of the reboiler, without the need to add other protective layers to reduce the risk level. The research results are of great significance for improving the intrinsic safety of station and yard process.

Design and Application of Safety Helmet Wearing Detection System in Oil and Gas Stations

2025, 61(3):  0-0. 

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Currently, the supervision of safety helmet wearing by operating personnel in oil and gas stations mainly relies on video surveillance through surveillance cameras and manual on-site inspections, which cannot achieve round-the-clock monitoring and incurs high labor costs. In response to the aforementioned issues, a safety helmet wearing detection system for oil and gas stations has been developed. Utilizing the YOLOv5s object detection algorithm, it detects individuals who are not wearing safety helmets within the area and alerts relevant personnel through various alarm methods. Furthermore, it can be integrated and linked with existing systems in oil and gas stations to achieve information interconnection and collaborative management of the stations. Practical application demonstrates that this system can accurately identify employees who are not wearing safety helmets correctly, enhancing the intelligent safety management capabilities of oil and gas stations.

Engineering Design and Standards

Application research on leak detection technology for dense phase carbon dioxide long-distance pipelines

2025, 61(3):  0-0. 

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Abstract: Long distance carbon dioxide pipelines are relatively rare in China, and there is a lack of on-site application research on corresponding leak detection technologies. On site testing and application research of distributed fiber optic leak detection technology were conducted based on a newly constructed dense phase carbon dioxide long-distance pipeline. This article introduces the principles and engineering settings of distributed fiber optic sound sensing and fiber optic temperature sensing technologies, and elaborates on the layout scheme of simulated leakage devices. The medium inside the pipeline is introduced as the gas source, and on-site simulated small hole leakage tests are conducted. The test results are analyzed, and the advantages and disadvantages of distributed fiber optic sound sensing and fiber optic temperature sensing technologies are summarized. Specific optimization and improvement measures are proposed based on the test results and the operation of the field. The precautions for the application of distributed fiber optic leak detection technology are summarized and the next research directions are proposed.

Calculation method of temperature and pressure compensation in SIL verification

Jie WANG

2025, 61(3):  0-0. 

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In the petrochemical industry, the flow measurement of gas or steam is a common and key measurement function in the device. In the loop with safety integrity level requirements and the flow compensation required by temperature and pressure in the process, the influence of the average probability of dangerous failures on demand PFDavg and the PFDavg of the flow sensor on SIL verification results after different voting forms are respectively described when the temperature and pressure sensors are required, and the methods that can be adopted in SIL verification according to different SIL level requirements are recommended.

Several Issues on Intrinsic Safety Verification of a Large Integrated Petrochemical Project under Construction in Zhanjiang, Guangdong Province

2025, 61(3):  0-0. 

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Abstraction: In the instrument explosion-proof of petrochemical plants, intrinsic safety explosion-proof technology is widely used. Intrinsic safety verification is the process of calculating and verifying the intrinsic safety characteristics of an intrinsic safety circuit. This article first introduces the basic concepts of intrinsic safety verification. Then, taking a large-scale integrated petrochemical project under construction in Zhanjiang, Guangdong as an example, the intrinsic safety verification of Profibus PA intrinsic safety circuit was introduced, and the FISCO intrinsic safety verification method was analyzed and supplemented with examples. Furthermore, this article discusses the issue of the location of associated apparatus (safety barriers) and provides examples to illustrate some cases where associated apparatus are arranged in explosive hazardous areas. Subsequently, this article analyzed the setting of surge protectors in intrinsically safe circuits, their explosion-proof types and intrinsic safety parameters, and their impact on the intrinsic safety characteristics and intrinsic safety calculations of the circuit. Next, this article takes the example of a remote type temperature transmitter and a reed switch magnetic level transmitter to illustrate how to identify intrinsic safety equipment and related devices for intrinsic safety circuits with "simple equipment" links, and conduct rigorous and scientific intrinsic safety verification based on this. Finally, this article provides a summary.

Process and Technology

Prediction algorithm and control strategy of wind and solar simulation control platform

2025, 61(3):  0-0. 

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With the increasing global demand for clean energy, wind power and photovoltaic power generation have been widely used and developed rapidly as important forms of renewable energy. A large number of wind farms and photovoltaic power plants have been built, which has ed more in-depth research on the performance, control, and interaction with the grid of wind and photovoltaic systems. The instability and intermittency of new energy power generation have brought challenges to the safe and stable operation of the power grid, and the actual wind farm and photovoltaic power station are limited by the natural environment, such as weather, time, etc., which cannot meet the needs of researchers to conduct experiments and tests at any time, so a device that can simulate the characteristics of wind and solar power generation in a laboratory environment is needed. Advancing wind and solar simulator technology.

Discussion on design of anti-UAV defense system for large oil and gas station

2025, 61(3):  0-0. 

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Research on Control Scheme of Refrigeration Unit in Oil and Gas Recovery Device

2025, 61(3):  0-0. 

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A certain petrochemical enterprise adopts oil and gas recovery technology to treat waste gas. This article introduces the process flow of the oil and gas recovery device and the parameters and principles of the refrigeration unit, focusing on the control scheme of the refrigeration unit in this technology, including start-up control, automatic operation control, stop control, interlocking scheme, common faults and solutions during the start-up process. The effective formulation of the refrigeration unit control scheme has achieved long-term automatic operation of the complete set of refrigeration unit equipment, thereby ensuring the long-term stable operation of the oil and gas recovery device and meeting the emission standards of waste gas.

Research and application based on the self-learning model for instrument anti-freezing and anti-condensation.

2025, 61(3):  0-0. 

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Quantitative feeding control scheme for API reactor

2025, 61(3):  0-0. 

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Introduces the control schemes for quantitative feeding of API reactor using different feeding methods. Introduces five software and hardware implementation methods for controlling feeding, including platform scales for barrel materials, weighing instruments for reactor, flow meters for closed pipelines, weighing instruments for intermediate tanks, and metering pumps. The application scenarios of each method are also introduced for reference by similar projects.