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Discussion on Fire and Gas System Design    2018, 54 (3): 0-0.   Abstract （59）            Knowledge map    Save For the fire alarm and gas detector system (FGS) has not been widely used and the relative lack of engineering design experience, this article introduces the application status and basic architecture of FGS system, and discusses its design contents and methods, fault safety problem, key points of the system configuration and so on. Related Articles | Metrics

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Analysis and Improvement of the Control Valve Swings    2015, 51 (1): 0-0.   Abstract （194）            Knowledge map    Save Annual output of 600ktons of methanol plant, high pressure steam to the medium pressure steam and decompression valve opening midway through the trip will happen swings, steam pipe network instability and thus influence the turbine operation. After continuously trying to grope and in-depth analysis, find the root cause of the problem and the corresponding design modification, finally solved the problem, has realized the full valve stroke, full-time space and stable operation.This paper describes in detail the whole process of analysis and solve the problem. Related Articles | Metrics

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2015, 51 (6): 0-0.   Abstract （201）            Knowledge map    Save Related Articles | Metrics

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2016, 52 (6): 0-0.   Abstract （134）            Knowledge map    Save Related Articles | Metrics

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The Design Of Automatic Control System For Product Oil Pipeline Engineering    2019, 55 (2): 0-0.   Abstract （36）            Knowledge map    Save Aimed at the design of automatic control system for product oil pipeline engineering,the structure of SCADA system is established, moreover, some solutions to the problem were proposed, such as Safety interlocking and Water attack protection, Detection and treatment of mixed oil interface, Batch tracking, Flow measurement and calibration, Leak detection, which accumulate valuable experence for domestic product pipeline engineering. Related Articles | Metrics

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Research on corrosion on-line intelligent monitoring and management technology    2019, 55 (2): 0-0.   Abstract （39）            Knowledge map    Save In view of the limitations of corrosion monitoring system in high sulphur natural gas purification plant, the solution of online ultrasonic thickness measurement system is put forward and its system composition and application design are studied. It complements the existing monitoring system and provides guarantee for realizing diversified monitoring means and ensuring the safe operation of the device. In view of the scattered data management of various monitoring technologies in purification plants, the solution of online corrosion monitoring management system is put forward. The overall and integrated technical methods of the system are studied, which provides technical support for efficient and automatic management of data and comprehensive grasp of corrosion situation. Related Articles | Metrics

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Investigation Distributed Control System in the Modularization of Oil and Gas Field Stations    2021, 57 (1): 0-0.   Abstract （52）            Knowledge map    Save The modular construction can better adapt to the oil and gas field ground construction project than the traditional construction mode. As one of the most important components, the control system and its adaptability become increasingly prominent. In this paper, the application of distributed control system in the modular construction of oil and gas field station is discussed. According to the existing project case, the hardware cost, construction, commissioning and maintenance of different control schemes are compared and analyzed. In addition, the adaptability and solutions of the system's field control cabinet are discussed. In order to provide reference for the modular construction of oil and gas field stations. Related Articles | Metrics

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Study on Inventory Optimization of Spare Parts in Large Petro-Chemical Company    2014, 50 (1): 0-0.   Abstract （194）      PDF       Knowledge map    Save Determining reasonable spare parts inventory in the large capital-intensive petro-chemical company, needs to consider not only operation effectiveness, but also affordable inventory capital of enterprise that occupies. An analytic model is studied based on actual history consumption data combining with failure overhaul interval for spare parts of petro-chemical company to determine the storage quota of spare parts，by modeling for consumption of the spare parts in large refine devices with the Normal Distribution model and Poison Distribution model in statistics. Finally this method proves to be effective through the actual engineering analysis. Related Articles | Metrics

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Methanol Distillation Predictive Controller Design Based on SVM    2015, 51 (1): 0-0.   Abstract （178）            Knowledge map    Save This article take t the packing type tri-columns for methanol production as a background, has designed one kind based on the support vector model forecast controller .In the solution methyl alcohol selective evaporation control meets system complex, non-linearity high, mechanism modeling error major problem, carries on the simulation through the Matlab software, finally indicated this method control progress is high, has the very good resistance to interference, has certain project significance. Related Articles | Metrics

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Design of Monitoring System for Oilfield Sewage Treatment    2015, 51 (1): 0-0.   Abstract （141）            Knowledge map    Save As the old oil fields in the increase of water content in the development process，the current oilfield sewage treatment has become an urgent problem．According to the characteristics of oilfield sewage treatment process and design a set of oilfield sewage treatment monitoring system based on industrial control software，the sewage treatment process important parameters were monitored，and some important dosing part in the research of control method，improve the quality of sewage treatment and achieved satisfactory results． Related Articles | Metrics

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2015, 51 (4): 0-0.   Abstract （241）            Knowledge map    Save PID control loop is the basis for the control layer in modern factories. PID control directly affects the efficiency and effectiveness of plant operations. Although PID control technology has widely used, but the clear guidelines to determine the quality of the control loop are lacking. This paper presents a methodology based on the priority calculated by the performance and the importance of loop by ISM to ranking control loop for maintain. The simulation study verified the correctness and applicability of the proposed method. Related Articles | Metrics

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Integrated Engineering of Instrument and Application    2016, 52 (1): 0-0.   Abstract （105）            Knowledge map    Save Integrated engineering is a very advanced design method in the world. But in order to connect with the original design method, it still needs to be redeveloped. According to the author's development experience, this paper expounds the digital integrated engineering environment of Intergraph Company. The data flow of instrument discipline in the integrated environment is introduced in detail. Then the redevelopment of intelligent data sheets is introduced. At last, combination an integrated engineering case of a certain offshore platform, the advantage of integrated design method is verified effectively. Related Articles | Metrics

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The Application and Troubleshooting of Radar Level Gauge    2016, 52 (4): 0-0.   Abstract （98）            Knowledge map    Save The guidelines for choosing, installing and troubleshooting of radar level gauge is presented. Taking practical application aspects into consideration, analyzed the non-contacting and guided wave installation, compared the antennas and frequency of non-contacting radar, probes for guided wave radar. Recommendations for the construction of stilling wells are stated. It also introduced the typical troubleshooting methods especially via the echo curve and electronic suppression of false echoes. Related Articles | Metrics

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2016, 52 (5): 0-0.   Abstract （47）            Knowledge map    Save Related Articles | Metrics

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Influence of Ultrasonic flowmeter Measurement accuracy Factors and Countermeasures    2017, 53 (2): 0-0.   Abstract （66）            Knowledge map    Save Natural Gas Pipeline has run high pressure gas transmission capacity, long distance transport characteristics, in terms of natural gas custody transfer meter high accuracy requirements. Ultrasonic gas flowmeters have wide turndown ratio, low pressure drop, no moving parts, suitable for large diameter pipes and other characteristics, better meet the measurement needs of long distance gas pipeline in the domestic long-distance gas pipeline has been widely applied . Ultrasonic flow measurement system and other measuring instruments, as in the actual production applications can be disturbed by various factors, thereby affecting the accuracy of the measurement instrument. Related Articles | Metrics

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Application of Fire-safe Valve in Ammonia Plant    2020, 56 (2): 0-0.   Abstract （45）            Knowledge map    Save Most of the raw materials, fuels, process products and products used in ammonia plant are Class A and Class B fire hazards, among which there are toxic substances, and the operation conditions are generally carried out at high temperature and high pressure. In chemical and petroleum automation systems, once a fire occurs, if some equipment in the design can cut off the spread of the fire source immediately, then the heavy loss of the plant area can be avoided. As an important part of automation system, valve is not only used to open and close the pipeline, control the flow direction, adjust and control the parameters(temperature, pressure and flow rate) of conveying medium, but also can cut off the flow path in time and avoid the flow of combustible fluid to the main equipment when it occurs fire. Therefore, the fire resistance of the valve should be considered as an important performance, which can attract the attention of the relevant personnel. Related Articles | Metrics

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The other thinking of communication between different kinds of contral systems    2014, 50 (3): 0-0.   Abstract （200）      PDF       Knowledge map    Save sometimes,there is a need of communication between different kinds of contral systems. In the past, this kind of communication can be achieved by the way of modbus in most cases. In this Article, I will introduce the way of establishing communication by the way of profibus (if the two communicating parties have profibus interface) while the analysis of similarities and differences of the modbus communication and the profibus communication. Besides, there are two instances that can help you to understand this communication. At the end of the article, we can get the conclusion that profibus can be another way to establish communication between different kinds of contral systems and this way is reliable, simple and economic. Related Articles | Metrics

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Design and application of CCR optimization control system based on expert system    2014, 50 (2): 0-0.   Abstract （206）            Knowledge map    Save In this paper, CCR process is the research object, through expert control system by means of natural gas found in current production conversion rate is not high, steam waste more on issues such as treatment and improvement, effectively reducing the overall energy consumption of the production unit, CCR current problems for the proposed solutions and implementation case. Related Articles | Metrics

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A New Desalter Interface Optimize and Control System    2014, 50 (2): 0-0.   Abstract （207）            Knowledge map    Save Abstract：An ID200 interface detector and an OW300 online water-cut monitor is described based on the principle of microwave energy absorption, is a new way to optimize and control the oil-water interface of desalter. Elaborating its working principle and structure, to improve the stability of desalter operation and function, increase the handling capacity of the device. Related Articles | Metrics

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Research on ensembling method for Modular Neural Network wenbo liu    2014, 50 (4): 0-0.   Abstract （217）            Knowledge map    Save In order to solve the problem of modular neural network (MNN) ensemble. This paper integrated the ideas of “divide and conquer” and “put the heads together”, and proposed a measure of selecting sub-nets on-line. For a given input, this method calculated the distance of the input and the center of sub-nets firstly, and then constructed the fuzzy member degree based on distance measurement, finally realized on-line sub-nets selection by fuzzy judgement. The number of sub-nets varied to different inputs. This made the MNN’s self-adapting ability be stronger. It ensembled multi sub-nets by linear method. The weights of sub-nets were optimized by reconstructing the sample space and dynamic programming. The simulation results suggest that this method can improve the precision and generalization ability effectively. Related Articles | Metrics

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Research of control method for steam balance in fertilizer plant    2014, 50 (5): 0-0.   Abstract （233）            Knowledge map    Save The steps of establing steam balance is introduced briefly. And The control methods of temperature and pressure reducing, vent valve for steam balance are researched. Base on a project, The acutal applications show its feasiblity and availability, it will provide references for choosing reliable control method for the similar fertilizer plants. Related Articles | Metrics

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A control scheme design for the PTA slurry preparation of PET plant    2015, 51 (2): 0-0.   Abstract （188）            Knowledge map    Save Abstract: According to the problem about low control accuracy of PTA slurry preparation in traditional PET, a cascade ratio control strategy which the variables are PTA slurry density and EG mixture for the PTA slurry preparation was designed based on the mathematical model of esterification reaction and analyses of control variable. Temperature correction which can improve control precision was introduced in molar formula. Related Articles | Metrics

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The application of coke tower "three valves interlock" in Coking plant    2015, 51 (2): 0-0.   Abstract （159）            Knowledge map    Save This paper mainly introduces the application of Interlocking between the four way valve and the feed block valve of Coke tower，the design ideas，the hardware composition,and the realization method. Related Articles | Metrics

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2015, 51 (3): 0-0.   Abstract （175）            Knowledge map    Save abc Related Articles | Metrics

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Brief Discussion aboutLow Temperature Instrument Selection in LNG Project    2015, 51 (4): 0-0.   Abstract （171）            Knowledge map    Save According to the fast development of LNG energy and technology updating, the selection and application of automatic instrument in LNG project is put forward through the analysis of all kinds of instruments. The characteristics of LNG low temperature medium are introduced. The measurement instruments of temperature, pressure, level, flow and analysis are illustrated respectively. The installation and attention of pressure connecting pipe, the comparison and selection of level instrument and flowmeter are emphatically introduced. The selection of temperature instrument and analysis instrument is described briefly. Combining with the actual working experience, by incorporating the application of instrument in liquefied natural gas project, the application of different instruments under the situation of low temperature in LNG project is proposed in the article. Related Articles | Metrics

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GE coal slurry gasification Lockhopper sequence and lockhopper valve selection    2015, 51 (5): 0-0.   Abstract （219）            Knowledge map    Save 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 Related Articles | Metrics

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Hydrogenation unit high pressure regulating valve online diagnosis    2016, 52 (2): 0-0.   Abstract （73）            Knowledge map    Save Wuhan company develops the measuring appliance preventive maintenance comprehensively, simultaneously advances the instrumental equipment predictability maintenance work development, the hydrogenation unit high pressure regulating valve is the installment essential equipment, the movement quality direct influence installment steady movement, we use FISHER Corporation the valvelink software the diagnosis test which to the company hydrogenation, the hydrocracking 29 FISHER high pressure regulating valve online carries on, finds out the high-pressured regulating valve the movement condition and the existence question, for examines the service to provide the basis, makes the beneficial exploration for the instrumental equipment predictability maintenanc Related Articles | Metrics

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Technical Study of Instrument and Control in Modular Construction    2016, 52 (3): 0-0.   Abstract （64）            Knowledge map    Save Based on under-construction ton level synthesizing project, the advantage of modular construction as opposed to traditional construction is elaborated in this paper. The technology of instrument and control (I&C) is introduced, consist of I&C devices selection, I&C 3D design, control system modularity, installation and testing of I&C etc. The company has solved many technical problems by steadily innovating. This under-construction project is a typical modular construction practice. Related Articles | Metrics

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The development and application of Power diagram econometric analyzing system based on Andriod platform    2016, 52 (6): 0-0.   Abstract （69）            Knowledge map    Save More than 5,000 pumping wells are running in the Huabei Oilfield. There are problems to the current management modes in two aspects. One is for pumping wells installed with wisdom-oilfield components, in the daily operation and maintenance, people at the well-site can’t access to the server and do data analysis or process the results, leading to well maintenance difficult and management efficiency low. The other is for non-network coverage pumping wells in remote area, we can’t make the remote digital control, the operating system can only rely on experienced artificially adjustments, lacking reasonable theoretical basis. To this end, based on Android platform, we developed a mobile power diagram econometric analyzing and querying system as well as a well-site data acquiring and analyzing system. This not only made the mobile phone a terminal which can access to the server processing results of the work area in security, but also made the mobile phone a data collecting and analyzing terminal at the well-site. The two systems had took a wide range of well-site application tests in Huabei oilfield, which dramatically lowered the labor intensity, improved the work efficiency and reduced the pumping wells’ management costs by up to 30%. The calculated production results showed the average relative error is only 5.1%, less than 10% of industry standards, which meets to the requirements of industrial applications. Related Articles | Metrics

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Discuss of thermowell resonance applicable conditions    2016, 52 (6): 0-0.   Abstract （81）            Knowledge map    Save Abstract：Calculate the natural frequency and the pressures stress of the typical thermowell in this paper，according to the calculation，we can know which condition needs pay attention to the calculation of the thermowell particularly，avoid the accident caused by thermowell, then give some advices about the design of the thermowell。 Related Articles | Metrics

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Cause analysis and solution of the high amplitude fluctuation of the reactor temperature in full density polyethylene unit    2016, 52 (6): 0-0.   Abstract （59）            Knowledge map    Save In view of the problem of the high amplitude fluctuation of the reactor temperature after the upgrading of the DCS system in Maoming ethylene full density polyethylene unit，the principle of control configuration execution in DCS system is analyzed，find out the executive order error of the control modules、 the functional blocks in the control module is the cause of the control fluctuations.The methods for solving these problems are proposed and good results are obtained. Related Articles | Metrics

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Selection and Analysis of level meters in HT-L coal gasification    2017, 53 (1): 0-0.   Abstract （91）            Knowledge map    Save Abstract： Level measuring is an important part of the automatic control system of coal gasification, this paper briefly summarizes the types of current level meters, and makes a comprehensive comparison of several level meters common applied in HT-L coal gasification projects. Then the principle and procedure of level meters selection has been proposed, and based on the actual process conditions of HT-L coal gasification, the appropriate level measurements has been selected, some of which has been analyzed and improved according to the actual effect of application. Related Articles | Metrics

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Application of SIL analysis in PH-SDPP engineering projects    2017, 53 (1): 0-0.   Abstract （89）            Knowledge map    Save In order to determine the safety and reliability of the safety instrument system（SIS）, Making SIL analysis for offshore oil engineering projects has become a trend. In this paper, taking SIL analysis of PH- SDPP engineering project as an example, modified risk chart analysis method, one of most commonly used SIL analysis methods in offshore oil field , whose main principles, processes, steps were briefly introduced .SIL was finally determined by the means of this method. Related Articles | Metrics

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An improved shaped analysis for stiction detection in oscillating control loops    2017, 53 (3): 0-0.   Abstract （51）            Knowledge map    Save Abstract: Valve stiction is one of the main causes of the control loop oscillation in industrial processes. Most of the existing control valve stiction detection methods are based on specific assumptions, only for a specific range. Aiming at the limitation that area peak method only applies to the self-regulating plant, the paper presents an improved shaped analysis method to apply to both the self-regulating plant and integrating process. Considering the obvious difference of the second derivative of error signal waves in two different plants, a new index is added to further stiction detect. The method overcomes the limitation of the area peak method only applicable to a particular range. Finally, the simulation experiment validates the effectiveness and reliability of the proposed method. Related Articles | Metrics

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Blowing method in the application of sulfur recovery unit liquid sulphur tank level measurement and practice    2017, 53 (3): 0-0.   Abstract （55）            Knowledge map    Save Liquid sulfur pool process combining with sulfur recovery units, big, easy to solidification of liquid sulfur medium viscosity characteristics, this paper expounds the method of blowing level measurement of static pressure balance principle, mainly introduced the method in the installation of the liquid sulphur tank level measurement of constant pressure and constant flow, static pressure transmitter range calculation, error analysis and so on application practice, and analyzes the application of blowing the advantages and disadvantages and improving measures. Related Articles | Metrics

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The Control Studies of Mamdani Fuzzy Neural Network    2017, 53 (4): 0-0.   Abstract （55）            Knowledge map    Save Abstract：In the thermal power plant limestone / gypsum wet flue gas desulfurization system，PH value of slurry has a great influence on desulfurization efficiency.The control process of PH value of slurry has nonlinear, large lag and variable gain process.Therefore, this paper analyzes and studies the PH value of slurry from the direction of desulfurization efficiency.In this paper, Mamdani fuzzy neural network is used to establish the controller and used in the slurry PH value control to further improve the search ability of the network in the control to achieve better control effect.The fuzzy neural network not only contains the fuzzy reasoning ability of fuzzy control to deal with the uncertain information, but also contains the neural network self-learning ability.It can rely on fuzzy language rules to train the network, making it easier to determine the structure and parameters of the neural network.Based on the Mamdani fuzzy neural network slurry PH value control for MATLAB design and simulation, and compared with the conventional PID control,The results show the effectiveness of the method. Related Articles | Metrics

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Development of Portable Sampler for Liquefied Natural Gas(LNG)    2017, 53 (4): 0-0.   Abstract （84）            Knowledge map    Save The study background and structural components of one new portable sampler for liquefied natural gas are introduced. The sampler mainly includes the gasification system, digital display system, receiving device and power supply, etc. The in-situ tests prove that the portable gravity sampler is simple in structure and easy for operation. Related Articles | Metrics

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The Failure Risk Research of the Onshore Oil and Gas Pipeline Based on Bayesian Network    2017, 53 (5): 0-0.   Abstract （85）            Knowledge map    Save By using the advances of uncertainty reasoning and modeling of Bayesian network, a new method based on BN is used in risk analysis for the failures of onshore oil and gas pipeline with multi factors and multi conditions. At first, the factors inducing the failure of onshore oil and gas pipeline , such as natural disasters, corrosion and construction management were analyzed and modified, probability calculation model based on BN is established. Then exampled with a pipeline, the failures with single factor and multi conditions, double factors and multi conditions, multi factors and multi conditions were quantitatively analysis and assessment, the failure probability of pipeline and the importance of the basic factors were obtained. It has been show that the evaluation method based on BN used in risk analysis for the failures of onshore oil and gas pipeline, probability distribution of the base events can be calculated more accurately, it also can find out the the most likely cause of the accident at the same time. Finally this method will provide reasonable suggestions for the risk control and safety management of onshore oil and gas pipeline accidents. Related Articles | Metrics

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2018, 54 (4): 0-0.   Abstract （29）            Knowledge map    Save Related Articles | Metrics

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Discussion on the application of leakage detection technology for long distance pipeline    2018, 54 (5): 0-0.   Abstract （130）            Knowledge map    Save Related Articles | Metrics