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2015, 51 (5): 0-0.   Abstract （250）            Knowledge map    Save This article mainly introduced the application of PLC in Vapor recovery monitoring systems for gasoline filling station. Through to the system’s hardware design method and the programming mentality's introduction, the article from the design application's angle introduced a gasoline vapor on-line monitoring system composed by OPLC, the superior machine, the sensor and so on. The system uses the OPLC data acquisition operation technology and the data bus mechanics of communication, in addition the superior machine industry configuration software man-machine conversation contact surface, the real-time monitor, the real-time long-distance issue, enable the entire gasoline vapor on-line monitoring system to achieve the online continuous monitoring and recycling gasoline vapor’s Air to liquid volume ratio, pipeline's stopping property and the fluid anti- situation request. Related Articles | Metrics

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

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2019, 55 (3): 0-0.   Abstract （31）            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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2017, 53 (4): 0-0.   Abstract （77）            Knowledge map    Save Related Articles | Metrics

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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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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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Research on Optimization Technology for Electric Desalination System Based on Big Data Analysis of Operating Parameters    2021, 57 (5): 0-0.   Abstract （640）            Knowledge map    Save Based on 400 days-period of operating data of the electrical desalination system, the big data analysis method was used to establish a mapping relationship between the operating parameters and the after-desalination salt content. The model was then applied in intelligent prediction of the after-desalination salt content for a total of 1052 operating samples acquired form Apr. 2019 to Sept. 2020. An average error of 0.42mg/L was found by comparing the prediction salt content with actual value. In order to analysis the influence of operating parameters on salt removing efficiency, a model-based optimization method was proposed. The method was used to study several key factors that affect the salt removing efficiency for electric desalination process. Based on the screening results, several key operating parameters that role the salt removing efficiency for electric desalination system were analyzed and corresponding optimal operation suggestions provided. The after-desalination salt content can be significantly reduced by following suggestions provided with the optimization method. 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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Application of CEMS in Acrylonitrile Plant’s Wastewater Incinerator    2015, 51 (1): 0-0.   Abstract （189）            Knowledge map    Save As the Continuous Emission Monitoring System gets more widely used in the chemical industry, combined with examples of a Continuous Emission Monitoring System in Acrylonitrile plant's wastewater incinerator, introduce the formations and configurations of the system from the engineering design's perspective. 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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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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Design of Online Web Monitoring Platform for Vapor Recovery Unit in Bulk Gasoline Terminals    2015, 51 (1): 0-0.   Abstract （178）            Knowledge map    Save Recently air pollution is increasingly serious in our country. In 2007, GB20950 ( Emission standard of air polluntant for bulk gasoline terminals ) was proposed by SEPA (State Environmental Protection Administration) to reduce the gasoline vapor emissions in the bulk gasoline terminals. According to this standard, vapor recovery unit should be installed in every bulk gasoline terminal before the deadline. In order to monitor these units remotely in an intergrated platform, an online web monitor platform was designed based on OPC technology, C/S structure, B/S structure, etc. Actual test shows that this platform is characterized by Good compatibility, strong real timeliness and good reliability 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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Remote monitoring system for offshore oil field ESP Design and Application    2019, 55 (3): 0-0.   Abstract （52）            Knowledge map    Save At present, terrestrial and offshore platforms are mainly communicated and exchanged by telephone and e-mail. It is difficult to reappear all kinds of production well data in real-time to land control and dispatching center. Land oil well production managers and reservoir analysts can not obtain real-time production well performance data. Therefore, it is necessary for offshore oilfields to improve the various data acquisition systems of production wells, develop a set of production wells data remote monitoring system, provide timely analysis data for production management of oil wells, and improve oil field production efficiency. This article will introduce the design of remote monitoring system in detail. Related Articles | Metrics

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Automation and Instrument System Engineering Design and Construction Strategy for Modern Refinery in China    2014, 50 (6): 0-0.   Abstract （205）            Knowledge map    Save Abstract：Automation and instrument intergraded system engineering experience and practice for modern refineries in China is summarized. It is pointed out that the factory internal network, control network and production data could not be open to outside and internal information shall not be issue to public for factory secrets and safety. Technical obstruction and differences will be analyzed for discussing the viewpoint and design strategy that integrate Chinese technology to complete, understand, take use of, develop since take advantage of technology from overseas. The over design and insufficient design in present engineering construction process is discussed. Practical thinking for engineering design and construction is introduced. 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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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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Discussion on Setting up of Detection and Alarm System for Combustible and Poisonous Gas in the Large Joint Chemical Plant    2019, 55 (2): 0-0.   Abstract （90）            Knowledge map    Save Abstract: The text discusses detection and alarm system for combustible and poisonous gas based on the characteristic of instrumentation control system structure for large joint chemical plant, the function and characteristic of safety instrumented system etc. In conjunction with the existing relevant standard/code and the document issued by the relevant authority, concludes that detection and alarm system for combustible and poisonous gas does not belong to safety instrumented system, SIL is not needed to be considered when setting up detection and alarm system for combustible and poisonous gas, puts forward setting up mode for detection and alarm system for combustible and poisonous gas of newly built up and modified/extended plant, improvement approach to detection and alarm system for combustible and poisonous gas for the production plant in operation. Related Articles | Metrics

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Discussion on the Design of Safety Instrument System Test and Maintenance    2019, 55 (4): 0-0.   Abstract （47）            Knowledge map    Save Abstracts：At present, the application of safety instrumented system is more and more popular and standardized, but in its safety life cycle, the test and maintenance of SIS has not received enough attention. Many SIS in service have not even implemented test and maintenance as required, or even have no test maintenance plan. In the stage of Engineering design, SIS test and maintenance facilities should be considered and designed, discussing the design and implementation of SIS functional test and maintenance, and mainly discusses the design contents of test and maintenance facilities for measuring instruments and final elements, and handling the measuring instruments’ “bad value” signal, and design of two main test and maintenance methods and facilities for final components. Related Articles | Metrics

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Analysis on Crude Oil Automatic Sampling system configuration and selection    2020, 56 (5): 0-0.   Abstract （163）      PDF       Knowledge map    Save According to the importance of crude oil automatic sampling on Crude oil analysis and custody transfer measurement, together with function requirement of crude oil automatic sampling. this paper introduces the main parts of crude oil automatic sampling system. With reference to related international and national standards, this paper analysis the type and product features of crude oil sampling system. Thus providing guidance and reference to the selection of crude oil automatic sampling system on different working condition. Related Articles | Metrics

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Exploration of PROFIBUS-PA application in engineering practice    2015, 51 (6): 0-0.   Abstract （204）            Knowledge map    Save Application in automation area has been making progress with each passing day along with the rapid development of network communication & information technology. A new era of fieldbus instrument has been turned on in tobacco industry and building material industry. In chemical and petrochemical area, although conventional transmitter with 4-20mA plus HART protocol prevails widely, but the advanced fieldbus configuration and concept, such as PROFIBUS-PA, Foundation Fieldbus, has been introduced in domestic plants by international chemical company, BASF, Celanese. The writer is fortunate to adopt PROFIBUS-PA currently, and find out and summarize some experience in PROFIBUS-PA application, which is shared below. Related Articles | Metrics

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Study on oil tank monitoring technology based on distributed optical fiber temperature measuring system Chang-Jing LIANG    2019, 55 (2): 0-0.   Abstract （42）            Knowledge map    Save Related Articles | Metrics

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2021, 57 (2): 0-0.   Abstract （9）            Knowledge map    Save Related Articles | Metrics

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Discussion and solution of PTA oxidation reactor level measurement error    2014, 50 (6): 0-0.   Abstract （256）            Knowledge map    Save Abstract： Liquid level is one of the main technological parameters of chemical production, the traditional differential pressure level technology has been widely used in the production, but It is difficult to applied in the high type containers and tower. Through the background introduction, liquid level measurement system composition and heat tracing conditions introduction, the article introduces a series of level measurement error caused by the liquid level increase and the growth of the sealing liquid pipeline after PTA oxidation reactor upgrading. The causes of problems is illustrated by computation. And then, paper introduces the measuring principle, components and advantages of Rosemount 3051 s/ERS liquid level transmitter retrofit scheme. Finally illustrate the feasibility of the scheme through the application example. Related Articles | Metrics

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Design and Numerical Simulation of Control valves with Micro Flowrates for High Pressure Difference applications    2015, 51 (2): 0-0.   Abstract （185）            Knowledge map    Save Control valves with micro flowrates (CV <0.1), for high pressure difference (△P> 10Mpa) working applications, inevitably cause flashing or cavatition,which issues in problems such as mechanical vibration, stem breakage, erosion of the sealing surface, noises and so on.To decrease them, a orifice plate was introduced with multi-stages as throttling elements,aiming at the achievement of proportional pressure difference between stages, which could reduce flashing, cavatition and erosion in sealing area. Firstly, the key dimensions was determined by use of formulas ,and then CFD software was used to calculate the fluid conditions inside the valve. The result of numerical simulation and flow test, eventually shows that the theoretical calculation and numerical simulation are reliable. Related Articles | Metrics

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2016, 52 (5): 0-0.   Abstract （47）            Knowledge map    Save 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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2017, 53 (3): 0-0.   Abstract （70）            Knowledge map    Save Related Articles | Metrics

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Discussion on Clock Synchronization Technique of Compressor Control System (CCS)    2021, 57 (5): 0-0.   Abstract （74）            Knowledge map    Save Related Articles | Metrics

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Application of Integrated Self-tracing Throttling Device in Coal Chemical Industry    2016, 52 (5): 0-0.   Abstract （78）            Knowledge map    Save Compared to traditional heat-tracing for instrumentation and its measuring pipe result in a high energy consumption,such as hot water heat-tracing，steam heat-tracing and electrical heat-tracing，self-heat-tracing can meet the goal of heat-tracing without using any energy,furthermore,self-heat-tracing can save the instrument's mounting material ,lower the quantity of instrument-maintaining work and improve the measuring accuracy.The structure designing idea of the integrated self-heat-tracing throttling device are introduced detailedly.Combined the practical application in coal chemical industry,the engineering experience of this instrument in the stage of engineering design,installation,operation and maintenance are summarized. 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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Design type analysis of offshore oil platform Wellhead Control Panel    2017, 53 (3): 0-0.   Abstract （204）            Knowledge map    Save Because of the differences in technical requirements, such as geologic oil reservoirs, wellhead platform conditions and logic control, the control principle and working method of the wellhead control panel are different, which lead to the basic design of the product. In order to summarize the product type and The design features of the wellhead make up the shortage of this research direction, and provide reference for the design and selection of the wellhead control panel. The design type analysis of the wellhead control panel is needed. According to the characteristics of the components and the environment, the design features of each type of control panel are summed up and summarized, and the design scheme of the wellhead control panel is described in detail and contrasted. Electronic push-button type is divided into positive pressure explosion-proof type and flameproof type, mechanical pilot valve type according to the different platform design requirements, divided into two types of control panel, Hydraulic control and gas-liquid control, and the characteristics of each type of design and application are analyzed. The cost and maintenance cost of the mechanical pilot valve control panel is low. Taking DCS as the control core, the design is the mainstream trend. It is recommended to use it in view of cost and maintainability. 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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Application of Ultraviolet Fluorescence Analyzer in the Natural Gas Total Surfur Online Analysis    2015, 51 (2): 0-0.   Abstract （168）            Knowledge map    Save The total sulfur content in the natural gas is the key indicator of the process control and the important parameter affecting the safety、stability and long-period running of the plants. This article not only introduces the natural gas total sulfur online analysis method and the comparison result，the measurement theory, constitution and performance index of the ultraviolet fluorescence analyzer, but also explains the design principles, design proposal, each component of the system, practical application and the existing problems. Related Articles | Metrics

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The Soft Measurement for Carbon Deposition of Platform Catalyst based on RBF in DCS    2015, 51 (3): 0-0.   Abstract （160）            Knowledge map    Save A importance index to platform catalyst is the carbon deposition, it is significant to measure the carbon amount of platform catalyst. This paper discussed the soft measurement technology for carbon deposition of platform catalyst based on RBF neutral network through DCS. On the basic of simple introducing platform progress, it outlined soft measuring of platform catalyst, and then described the RBF neutral network theory and establishing of neutral model further. It also narrated programming in the DCS for the achievement of the soft measurement technology about carbon deposition of platform catalyst. Related Articles | Metrics

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Foreign PDS valve performance comparison analysis    2017, 53 (2): 0-0.   Abstract （100）            Knowledge map    Save In each unit of polyolefin, generally USES the PDS valve, this valve requires high switch frequency, long service life, safe and reliable.Through the China and South Korea petrochemical field repair situation can be seen, due to the high frequency switch valve, and polyolefin powder easily in the valve cavity agglomeration.Valve design, manufacturing and material use, the valve used to start running is not smooth, binding, and, ultimately, holding in death of the valve can't action, causing parking device. This kind of high frequency valves at present monopoly by foreign brands, such as AUGUS, TYCO, KITZ, etc. These PDS valve manufacturers, have their own advantages and disadvantages in use.Owing to the high price of this kind of valve, and key spare parts spare parts cycle is long, some price is higher than the whole valve price.Once appear fault,looking for foreign manufacturers to maintain or provide spare parts, from the perspective of process production need, also not realistic.So how to select suitable for polyolefin device and high cost performance, the use of reliable performance of PDS valve is very important. The PDS valve through the overhaul, overhaul, maintenance, surveying and mapping, summarize the fault reason, and comparing the usage of each manufacturer of the valve.To complete the PDS valve structure optimization, to promote the localization lay the foundation of the valve. 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 Difference Research on Pipeline Valve Stations Design Standards at Home and Abroad    2019, 55 (2): 0-0.   Abstract （131）            Knowledge map    Save Pipeline valve station was the important facilities to ensure the safe operation of long distance pipeline. It can reduce oil leakage loss and environmental pollution. There are several problems in the design of pipeline valve station in China. It should be unified and specified at the standard level, such as the lack of flexibility in valve site selection and spacing, the difference in valve station crossing and over-crossing , the design of check valve, and the poor reliability of valve station in remote areas. The pipeline valve station design standards of USA, Russia and Canada were selected, and the important technical differences between domestic and foreign valve station design standards were studied, and the practical experience of foreign pipeline valve station design and operation management was introduced, such as the site selection principle of reducing oil leakage risk and economic loss, 10% and 25% distance adjustment for oil and gas pipeline valve station in special area, the RTU valve station setting principle, the recommended practice of river crossing and over-crossing valve station, valve station power demand to determine the power supply mode, preferred to use above-ground valve station, etc. Finally, some suggestions are put forward to improve the design standard of pipeline valve station in China. 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