Automation in Petro-Chemical Industry

Development and Application of Data Analysis System for Oil-water Well Production

2021, 57(6): 0-0.

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Based on the example of designing and realizing the production data analysis function of oil wells in oil fields, this paper introduces how to Visual C#. it net is the development platform, using open source MySQL database, HighCharts components, jQuery EasyUI framework and other technologies, make full use of the WebServer interface of the existing system to quickly build the process of Web applications based on the B/S mode.

Internet technology development and petrochemical industry application prospect

2021, 57(6): 0-0.

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Human beings are entering the fourth industrial revolution, the Internet industry is the Internet of things, cloud computing, big data, twin technologies such as artificial intelligence, chain blocks, digital platform of organic integration, is a new generation of information technology and modern industrial product of depth fusion, is the important foundation of digital, networked, intelligent manufacturing facility, also is the commanding heights of the global competition. Petrochemical industry with oil and gas exploration and development, refining industrial Internet sales, such as natural gas and power generation, engineering technology and service business to a new level. In the face of the petrochemical industry massive amounts of data, through the existing information island, lake, the construction of data mining data "reservoir", based on the new platform to solve the problem of traditional innovation, realize the production and operation efficiency significantly increased.

Petro-Chemical Process Fault Diagnosis Based on KPCA and LSTM

2021, 57(6): 0-0.

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In the production of modern Petro-chemical industry, the level of fault diagnosis directly determines the quality of the production system. It will bring great convenience to the production personnel and avoid the occurrence of accidents if we can judge the fault timely and accurately. Recently, artificial intelligence and machine learning technology have been used in fault diagnosis of Petro-chemical process. In this paper, a Kernel Principal Component Analysis- Long Short Term Memory (KPCA-LSTM )fault diagnosis method is proposed. Firstly, Kernel Principal Component Analysis (KPCA) is used for fault detection, and then the fault data after KPCA dimension reduction is input into Long Short Term Memory (LSTM) for diagnosis. Finally, Tennessee Eastman（TE） process data set is used to prove the effectiveness of the proposed method. At the same time, the training time of this method is reduced compared with ordinary LSTM.

Application of Dual Predictive PI Algorithm in Temperature Control of Reactor

2021, 57(6): 0-0.

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The temperature control process of the reactor commonly used in the pharmaceutical industry basically has difficulties such as large time delay, large inertia, nonlinear and frequent temperature regulation. The most widely used PID control algorithm is always unable to solve this kind of problem, and the effect is poor. A method combining predictive PI(PPI) algorithm and dual control (dual predictive PI algorithm) is proposed. The main controller ensures the rapidity of temperature changes during the temperature adjustment process. The auxiliary controller adjusts the water flow rate of the valve in real time, reduces the energy loss when switching the temperature control source, and ensures economy. Both the main and auxiliary controllers adopt predictive PI controllers, which can effectively solve the problems of large time delay and large inertia. The simulation results show that the dual predictive PI algorithm has fast response speed, the rise time of the control system is only 41.9% of the PID control system with Smith estimated compensation. At the same time, it also has good anti-interference and strong robustness. This technology can provide support for accurately and stably controlling the temperature of the reactor.

Flow Control of Centrifugal Pump Based on Second Order Linear Active Disturbance Rejection

2021, 57(6): 0-0.

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The flow control of centrifugal pump is the core control link of product oil long distance pipeline regulation system. In order to improve the stability and anti-interference ability of the centrifugal pump flow control system in the product oil transportation station, and improve the control accuracy of the system, a centrifugal pump flow control system based on second-order linear active disturbance rejection controller is designed. The mathematical model of the centrifugal pump flow control system is established, and the design principle of the second-order linear active disturbance rejection controller is analyzed. On this basis, the centrifugal pump flow control system based on the second-order linear active disturbance rejection controller is designed, and the parameter tuning principle of the controller is analyzed from the perspective of frequency domain. Through MATLAB / Simulink software simulation experiment, and compared with the traditional centrifugal pump flow control system based on PI controller, the simulation results show that the centrifugal pump flow control system based on second-order linear second-order linear active disturbance rejection controller has faster response speed and stronger anti-interference ability.

Brief Discussion on Process Analyzer System in Chemical Plant

2021, 57(6): 0-0.

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In large-scale chemical plant, On-line process analyzer and sampling systems are often used to measure the composition, physical properties, and chemical properties in key flow paths to monitor the stable and healthy operation of process plants. On-line process analyzer and sampling systems are often used to measure the composition, physical properties, and chemical properties of process media in key flow paths to monitor the stable and healthy operation of process plants. By analyzing the structure and characteristics of On-line process analyzer and sampling systems, this paper utilities the common standards and engineering experience to introduce the key design points, which is favorable to the selection and application of On-line process analyzer and sampling in engineering design.

The Spurious Trip Calculation and Analysis of One out of One Structure Based on the Markov Model

2021, 57(6): 0-0.

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There is a few study for spurious trip of safety instrument system, calculation of possiblity of failure (PFD) and spurious trip rate (STR) had been introduced. The analysis and comparasion of conventional redundant structure by calculation had been studied. According with the actual SIF loop with one out of one in refinery and chemical factory，The modified Markov model with AMO is proposed, studies show that it will reduce the rate of spurious trip. The suggestion on SIF loop is approached with combination of engineering practice,the purpose of reduce the spurious trip rate can be carried out in some case approved by refinery and chmical factory.

Design of On-line Monitoring System for Water Cooler Leakage in Petrochemical Enterprises

2021, 57(6): 0-0.

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An on-line monitoring system of water cooler leakage was established for early warning of internal water cooler leakage and effectively reducing the social and economic losses caused by circulating water pollution. The Overall framework, hardware design, software architecture and main functions of the system software are described in detail. The establishment of the system provides powerful technical support and guarantee for early warning and treatment of water cooler leakage.

Engineering Design of instrument impulse pipe and transmitter installation Subject to High Temperature and High Pressure in Hydrogenation Unit

2021, 57(6): 0-0.

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Hydrogenation process is the most important petrochemical process widely used in recent years. The hydrogenation unit has the working conditions of hydrogen, high pressure, high temperature and high H2S corrosion, with high potential risk. The hydrogenation unit changes from the cold state before start-up to the high-temperature hot state of normal production, or from the high-temperature hot state of normal production to the cold state of shutdown. Because of thermal expansion and cold contraction, the process pipe will have a large displacement, and the height of process equipment will change greatly. These changes will pull the instrument pipe and transmitter that the instrument pipe is connected to, which will lead to the cracking and leakage of pressure pipe, and cause serious accidents easily. These characteristics put forward high requirements for the engineering design of instrument pressure pipeline selection and transmitter installation. The author has been engaged in instrument design of hydrogenation unit for a long time. Now share the problem analysis, design scheme and engineering practice, please criticize and correct.

Implement digital delivery and delivery application in large coal chemical projects

2021, 57(6): 0-0.

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In this paper, the digital delivery of the ethylene glycol project with an annual output of 1.8 million tons of SHCCIG Yulin Chemical Co., Ltd is taken as an example， and based on the achievements and application cases of digital delivery in the petrochemical industry, the delivery range and depth of digital delivery in the design process of the coal chemical industry are summarized. At the same time, the paper expounds that the digital delivery platform realizes the classification, archiving, and retrieval of delivery documents in the process of project implementation. In addition, the application of the 3D model files of digital delivery in the operation and maintenance stage of the factory is explored, which lays a foundation for the implementation of digital delivery in the factory.

Application of Monitoring Automation System in Petrochemical Plant

2021, 57(6): 0-0.

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With the continuous expansion of petrochemical plant scale, monitoring automation system has been applied for health monitoring of production facilities in some countries and regions. This study takes a Propane dehydrogenation complex plant which is built in the country along the belt and road as an example, expounds and analyzes the system framework, sensor (including inclinometer,accelerometer,sensor of force and direction of the wind) detection principle and design scheme of monitoring automation system, and it has a certain reference significance for the practical application of similar facilities and conditions.

Quantitative Risk Assessment and Analysis of Gas Pipeline after Regional Upgrade

Chang-Jing LIANG

2021, 57(6): 0-0.

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Abstract: According to the principle of pipeline integrity management, a complete set of quantitative risk assessment technology for regional grade upgrading was established for the risk change caused by the regional grade change along the gas pipeline. The Monte Carlo method was used to calculate the failure probability of the pipeline in the limit state, and the Stephens hazard model was used to calculate the failure consequences caused by thermal radiation. The acceptable criteria of personal risk and social risk were also studied. The results of the case analysis show that the risk value increases after the region is upgraded, and the evaluation results are in line with the actual situation of the site. In the later stage, effective risk mitigation measures can be taken according to the economic and feasibility analysis. The research results can provide practical reference for the quantitative analysis of pipeline risk level.

Research on Application of Internet of Things Technology in Intelligent Safety Training Base

2021, 57(6): 0-0.

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Abstract: In recent years, the Internet of Things technology has made important developments in many industrial fields. As an important part of safety management, safety training has been paid more and more attention by enterprises and governments at all levels. For the first time in China, the concept of “smart security training base” with “smart construction, smart management, and smart service” as its main characteristics is proposed in China. The application of key networking technologies in smart training bases has been explored. On this basis, the typical functional design of the smart training base has been completed, which has important guiding significance for the safety management and safety training industry. At the end of the article, the deficiencies in the application and development of the Internet of Things technology in the field of security training are analyzed and prospected, and it is intended to encourage related industries to seize the important development opportunities of this Internet of Things technological change, deepen the core technology application, and tap the technology. Application potential to realize the gorgeous turn of the safety training base from "traditional" to "intelligent".

Study and Application of Multi-service Converged IP Bearer Network in offshore oil and gas field

2021, 57(6): 0-0.

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With the development of informatization, digitization, and intelligence in offshore oil and gas fields, production systems and office systems have increasingly higher requirements for basic networks. However, the current offshore platforms have complex network structures, and the coexistence of multiple traditional and emerging services leads to problems such as poor network scalability. To solve the problem, a multi-service IP bearer network is utilized to build a safe and secure communication network. OSPF routing technology and MPLS virtual private network technology are used on the existing CNOOC basic network to plan a multi-service integrated IP bearer network. Provide safe, reliable, easy-to-manage and maintain data transmission channels for production scheduling, video, voice, power/instrument control networking and other business applications; it provides a basis for the design and planning of IP bearer networks for offshore oil and gas field.

Design and implementation of early fire warning system for refining and chemical enterprises

2021, 57(6): 0-0.

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The paper analyzes the current situation of t SINOPEC CO. Tianjin Branch video application, analyze the traditional fire alarm model research, identified the video intelligent fire alarm system in the early years of the application - implementation plan, to realize the integration of voice of pop-ups, SMS alarm linkage, changing the passive work situation in artificial inspections, realizes the unmanned intelligent video surveillance management.

Research on The Application of Alarm Flood Suppression Measures in Gas SCADA System

2021, 57(6): 0-0.

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Nuisance alarm is the main reason for the overflow of alarm in process monitoring system of process industry. Alarm flooding will cause the production process monitoring system to lose its original main early warning function, which has laid a serious hidden danger for the safety production monitoring of enterprises. In order to reduce the impact of disturbance alarm on production process monitoring, the alarm delay, alarm dead zone, alarm threshold deviation and other suppression measures can be set in the alarm management system. The application practice shows that the alarm flooding suppression measures can effectively control the frequency of jitter and resident alarm, so as to avoid the alarm flooding phenomenon in the production process monitoring system.

Failure Analysis and Troubleshooting of CYR Steam Turbine

2021, 57(6): 0-0.

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This essay illustrates the analysis of the causes that have repeatedly led to the gas seal leak, no-speed trip and vibration trip with the CYR Steam Turbine by checking the mechanical and instrument parts of this equipment. Maintenance measures and commissioning plans that made since have successfully eliminated the shutdown risk during the solo-running of the motor-driven pump, remarkably achieved the energy-saving and cost-saving purposes, and eventually ensured a stable and smooth running of the steam turbine.

Speed Fault Treatment And Optimization Of Cracking Gas Compressor

2021, 57(6): 0-0.

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The ethylene cracking gas compressor K201 of Sinopec-SK was put into production in 2013, which was overhauled in April 2016 and has begun to operation in June 2016. In December 2017, there are five of six speed probes of the compressor K201 failed one after another and could not be displayed normally. Check the compressor is running normally. In the case that it is unable to open the cover to check and deal with the fault of speed probe, Sinopec-SK uses K201 zero speed and key phase signals as control signals, uses an adjustable frequency signal generator to simulate the frequency signal of the speed probe, and simulates the speed signal for the overspeed protector to ensure the normal operation of K201. It ensures that K201 continues to operate normally for 2 years and 10 months. During the overhaul in October 2020, it was found that the lead wire of the K201 speed probe was broken when the cover was opened. In the transformation of K201, the speed probe was put into operation normally after installation by improving and optimizing the installation method. The emergency treatment of K201 speed probe’s fault and the improvement of installation method have good promotion value.

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