Automation in Petro-Chemical Industry

The Application of TDLAS Technology in hydrogen sulfide concentration detection

2022, 58(3): 0-0.

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Abstract：Hydrogen sulfide is toxic and harmful. It is of great significance to detect the concentration of hydrogen sulfide in industrial production. In this paper, we took the online measurement of hydrogen sulfide in natural gas desulfurization process as the application example. The analysis system based on tunable diode laser absorption spectroscopy (TDLAS) technology was used for concentration measurement. TDLAS gas analysis system based on molecular selective absorption principle, Beer-Lambert law and wavelength modulation technology, includes analysis module, gas module and human-computer interaction module.In the application case, 1570nm laser wavelength is chosen to analyze hydrogen sulfide in natural gas as the example. In the experiment, gas mixtures of 0-100 ppm hydrogen sulfide are produced in typical natural gas streams through gas module. The hydrogen sulfide concentration is calculated by chemometrics method. The results show that the analysis system meets the measurement requirements of 2% FS. It demonstrates that TDLAS technology, which has the advantages of non-contact, rapid reaction and accurate measurement, meet the needs of trace gas measurement in petrochemical industry.

The Instruments Configuration Brief Analysis of the Hybrid Tank Measurement System for the Atmospheric stationary roof tank

2022, 58(3): 0-0.

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About the commonly used hybrid tank measurement system(which is short for HTMS hereafter) for the atmospheric stationary roof tank, this article has given a brief introduction about the functions of tank measurement system, the international and domestic standards that should be followed, and the principles of field instrument configuration; This article also has given a detailed introduction about the accuracy requirements of the field instruments , the installation main problem and solution of level gauges, and the typical system architecture; it has a guiding role for the engineering design of the measurement system of similar storage tanks.

Research on control system of petrochemical network security based on classified protection 2.0 of cybersecurity

2022, 58(3): 0-0.

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Network security of process control system incidents had exploded in the petrochemical industry of the world recently, and brought a large amount of economic losses. With the development and acceleration of digitization and intelligentized, the weakness and risk of process control system had been magnified, which seriously affect the safe production and operation of petrochemical industry. By analyzing the present situation of network security in petrochemical industry, and based on the requirement of classified protection 2.0 of cybersecurity compared with the previous one, this paper studied a new plan about the security protection of process control system in petrochemical industry, about how to meet the requirement of classified protection 2.0 of cybersecurity, about how to establish network security physical environment, communication network, zone boundary, computing environment and management center, etc., also offered reference for petrochemical industry in the construction of process control system of security protection.

Calibration and verification of gas transmission station safety instrument System based on SIL analysis

2022, 58(3): 0-0.

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Study on Anti-collision Structure of Pneumatic Emergency Shut-down Valve

2022, 58(3): 0-0.

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In order to realize rapid shut-off of the emergency shut-down valve(ESV)[1], the method of increasing the gas flow is usually adopted, such as increasing the pipeline size and air source interface or selecting a larger model actuator. Although this method can effectively speed up the closing speed of the valve and increase the driving force to the valve, this driving force between the sealing internals of the valve will affect the valve safety and service life, and increases the undetectable dangerous failure rateof the pipeline[2]. Therefore, aiming at the safety of pneumatic valves in oil and gas industry, this paper puts forward the concept of fast closing and slow shut-off of ESV (referred to as fast closing and slow shut-off) [3], and gives a design method that can realize fast closing and slow shut-off of ESV, which can not only accelerate the movement speed of valve, but also reduce the driving force. This method can effectively reduce the driving force when the valve is closing, and weaken the influence of driving force on the valve seals and effectively increase the safety of the valve [4].

Evaluation of renewal effect and Research on Influencing Factors of Quantitative loading system

2022, 58(3): 0-0.

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This paper makes a comparative analysis before and after the equipment renewal of quantitative loading system in a refinery, and proves the application effect through the measurement data. This paper analyzes the factors affecting the loading accuracy of the quantitative loading system, deeply analyzes the business process and process flow problems affecting the loading efficiency and accuracy, and puts forward transformation suggestions for peer exchange and reference.

Application of solenoid valve in Lanzhou Petrochemical Ethylene Problems and improvement measures in the use of cracking furnace unit

2022, 58(3): 0-0.

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Due to the complexity of structure and the particularity of flammable and explosive materials, a large number of electromagnetic valves are equipped to control the corresponding control valves and shut-off valves in 11 cracking furnaces of ethylene plants in Lanzhou Petrochemical Company. Their operation status directly affects the safe production of cracking furnaces. Combined with years of field maintenance experience, the single solenoid valve and double solenoid valves are transformed into independent and redundant double solenoid valves. The invention solves the problem of misoperation of single solenoid valve configuration, eliminates the problem of action refusal in double solenoid valve configuration, eliminates the hidden danger that the cracking furnace device can not stop safely, realizes the maintenance and replacement of the fault solenoid valve in the on-line operation state, and ensures the long period, safe and stable operation of Lanzhou Petrochemical Cracking Furnace.

SIS execution and SIL verification in engineering design

2022, 58(3): 0-0.

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All new or in-service installations and tank farms, involving "Two key points and One major" need to be equipped with safety instrumented systems for the entire life cycle and SIL levels assessed. The engineering design company should compile a reasonable safety instrument specification to realize the instrument safety interlock function. The article introduces the basis and content of the instrument safety specification, and analyzes the safety and availability of the feed valve interlocking control scheme for the feed line HH pressure of the heating furnace with different interlock trigger configurations under the premise of meeting the SIL level requirements.

Setting method of alarm threshold of key liquid level in crude oil storage tank

2022, 58(3): 0-0.

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Discussion on Determination Method of Risk Acceptance Criteria for Long-Distance Pipeline

2022, 58(3): 0-0.

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The safety of long distance pipeline is the focus of national and social attention. Pipeline integrity management and risk assessment have become common practices to ensure pipeline safety. Risk acceptance criteria is the key technology of risk assessment, but there is no unified and recognized criterion at home and abroad. The paper expounds the basic meaning, influencing factors and principles of risk acceptance criteria. The technical route is to first solve the personal risk and social risk, and then pay attention to the risk of property loss and environmental damage. Based on international risk assessment practices, risks are divided into unacceptable areas, tolerable areas and widely accepted areas. According to the characteristics of China long distance pipeline and accident statistics, it is suggested that the boundary between unacceptable risk area and tolerable risk area is 1×10-4 persons /year, the boundary between risk tolerable area and widely accepted area is 1×10-6 persons / year. The relationship curve model between the surpass probability (F) and the number of deaths (N) of social risk, the P-L curve of the acceptance criteria of property loss, and the average recovery period of the acceptance criteria of environmental damage are determined. It is of great significance for improving the level of pipeline safety management to study the risk acceptance criteria suitable for the characteristics of pipeline in China.

Double Wall Fuel Tanks Tracking and Tracing System Based on RFID Technology

2022, 58(3): 0-0.

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In recent years, the problem of fuel leakage in gas stations has been widely concerned. According to the requirements of relevant national policies and regulations, gas stations should complete the transformation of double wall fuel tank within a limited time or take other anti-seepage measures. Due to the tight time and heavy task in the project, the quality control of double wall fuel tank in raw material procurement, production process, transportation process, installation and acceptance and other links has put forward high requirements. For this reason, this article is based on the RFID technology, in combination with satellite positioning and mobile Internet technology, developed a process quality tracking and tracing system for double wall tanks. Through the application of this system, the whole process control from production to final acceptance of double wall tank is realized. The application effect is very good and the whole quality of double wall fuel tank replacement project is guaranteed effectively.

Production organization system of petroleum engineering information management platform Research and Application

2022, 58(3): 0-0.

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Informationization is the basic project to promote the safe, efficient and sustainable development of petroleum engineering industry, and platformization is the general trend of enterprises to realize the transformation of production organization mode, which vigorously drives the integration of informationization, platformization and petroleum engineering. Building the management platform of petroleum engineering enterprises and carrying out the research and application of key technologies of production organization system will lay a solid foundation for improving the modernization level of China's petroleum industry. Jianghan Petroleum Engineering Company uses the new generation of information technology such as big data and cloud computing to accelerate the process of business knowledge reengineering, providing reference for the digitization of petroleum engineering production organization and management.

Research on Optimization Scheme of Connection between Digital Delivery and Plant Management

2022, 58(3): 0-0.

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Under the background of digital revolution, petrochemical enterprises have made great progress in both digital delivery of plant construction and intelligent plant management in recent years, but there are also problems such as isolated island of information and disconnection between data delivery and application. Based on the identification of problems, this paper puts forward solutions from the aspects of data source uniqueness, engineering data and plant data flow. It also puts forward specific suggestions on the role of engineering service enterprises in this process.

Research and application of automatic drainage and oil interception system for crude oil storage tank

2022, 58(3): 0-0.

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In view of the long-term disadvantages of the low degree of automation of the drainage and oil interception of the crude oil storage tank, and the serious consequences of the accident caused by the outward flow of the oil from the drainage pipeline under abnormal conditions, the automatic drainage and oil interception system of the crude oil storage tank is studied, and the composition of the automatic drainage and oil interception system of the crude oil storage tank and its drainage and oil interception methods are introduced. After field application, the automatic drainage and oil interception system of crude oil storage tank is not affected by medium density, viscosity, temperature, pressure or pH value. It can accurately monitor the position of oil-water layered interface, control the drainage state through solenoid valve, and realize automatic drainage and oil interception of drainage pipeline.

Application research of remote duty system during crude oil entrucking in isolated oil-well

2022, 58(3): 0-0.

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In view of the current situation of isolated wells in oilfield, such as remote location, high cost of personnel stationing and difficult management, research on remote duty control and automatic oil loading of isolated wells is carried out, and a set of duty system integrating data collection, voice intercom, remote control and information networking is formed. In order to improve the management level and reduce the production cost, the central control room can carry out the daily management and operation of the isolated wells production, such as remote tour inspection, video automatic inspection and remote oil loading control. The isolated wells production mode suitable for the characteristics of water township oilfield is formed.

Design of an exhaust gas control scheme for the sump and tank area of RFCCU

2022, 58(3): 0-0.

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Abstract: One petrochemical company adopts the "Total Hydrocarbon Concentration Homogenization-Catalytic Oxidation" technology developed by Sinopec Dalian Petrochemical Research Institute to treat the waste gas from the top of the sump and the top of the tank in the tank area of RFCCU, which mainly includes a total hydrocarbon concentration homogenization tank and a "heat exchange-heating-catalytic oxidation" unit. The control scheme of the total hydrocarbon concentration homogenization tank, catalytic fan and "heat exchange-heating-catalytic oxidation reaction" unit was introduced, and the automation degree of the plant was further improved by setting one-key start-up and stop-up procedures．The supporting design of the plant was carried out to ensure the safety and stability of the plant during operation.

Brief Analysis on Design and Practice of Gravity Flow Quantitative Loading Oils

2022, 58(3): 0-0.

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Train loading automation system play a key role in cost saving, program-controlled loading and safety production. Taking the quantitative loading automation transformation of a product oil loading terminal station as an example, the design scheme of automatic quantitative loading system is introduced. This paper focuses on the selection of key instruments and valves on site when oil products are loaded by gravity, and program design of quantitative loading system. The operation results show that the system improves the loading efficiency and accuracy, ensures safety, saves cost and promote economic benefit.

The development of intelligent monitoring and management platform for oil and gas pipeline

2022, 58(3): 0-0.

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With the rapid development of China's economy, the mileage of long-distance oil and gas pipelines is increasing, and the urban scale is expanding. As a result, more areas around pipeline become population and buildings concentrated. Once the pipeline of these key areas occur accident, serious consequences will be caused. So an image back-end recognition algorithm based on deep learning is developed to reanalyze the alarm of camera installed on the pipeline. Using the Internet of things technology, an oil and gas pipeline intelligent monitoring and management platform is built and which has all-weather monitoring, early warning functions. The application of the platform reduces the risk of third-party damage which caused by external personnel, vehicles, large machinery and construction, and avoid accidents such as pipeline leakage, drilling and oil theft in these key pipeline sections.

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