Table of Content

20 December 2015, Volume 51 Issue 6

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Development and Commentary

Development and Application of Online Mass Spectrometer Analysis Technology

Jing-Cheng Yang

2015, 51(6):  0-0. 

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Online mass spectrometry can monitor the industrial process on line according to principles of determing the nature and quantity with advantages of high automation degree, wide measuring range, fast analysis speed and analyzing multiple sets of data synchronously. Main features and components of online mass spectrometer analysis system are summerized. Functions and principles of the ion source and mass analyzer are introduced in detail. Mass spectrum quantitative analysis method is mainly disscussed. Development and application of mass spectrometer in industrial process monitoring are introduced with summary of attentions in use and maintenance.

Engineering Design and Standards

Exploration of PROFIBUS-PA application in engineering practice

2015, 51(6):  0-0. 

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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.

Application of differential pressure liquid level gauge for balance container in oil refining unit

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Abstract:：The North Sea oil refining off-site transformation petrochemical project power station fuel gas boiler drum level measurement as the engineering background, focuses on the introduction of balance container based on, in oil refining device balance container of the differential pressure level meter plus or minus pressure chamber of the choice and the level of compensation is necessary for in-depth discussion.

Design Method of Offshore Oil Platform Wellhead Control Panel

2015, 51(6):  0-0. 

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Wellhead control panel is one of the most important wellhead control device at the oil and gas production process on the offshore oil platform. The opening and closing of all of surface-controlled sub-surface safety valve and surface safety valve are controlled by wellhead control panel which plays an important role for safety production of the whole offshore oil platform. Firstly, the working principle and internal composition of wellhead control panel are introduced in the paper. Then the detail design methods and formulas of wellhead control panel are introduced in the paper. The paper not only provides engineering guidance for designing wellhead control panel, but also provides guideline of operation and maintenance for operators.

Discussion Application of High Integrity Pressure Protection System (HIPPS)

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Along with the development requirement of chemical and refinery industry as well as the safety improvement requested by Government, the passive pressure relief system cannot be satisfied the safety requirement. Compared with western country, active safety such as high integrity pressure protection system (HIPPS) had been used in part of the chemical and refinery projects. What is difference on using HIPPS? It depends on standards and codes, no relative in domestic whereas recommended in western country. This paper described the concept, selection principle, implement, and detail specification of HIPPS, which will be the reference on adopting the HIPPS.

Automated Instrument and Engineering Design for Petrochemical Processing Oil Storage Tank

2015, 51(6):  0-0. 

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Abstract：Automated Instruments selection and engineering design strategies used for petrochemical processing oil storage tank are described in the article. According to processing and measurement requirement, the Instruments selection of temperature, pressure and level are focused on, especially some level measuring instruments most used in oil storage tanks. Various Instruments process connection specifications are listed. Discussing the problems related to engineering design, such as type of selection for tank farm on-off valve, power supply, instrument air supply, cables layout etc，the successful and practice engineering design schemes and methods are introduced.

Process Control Technology

The Application Features of the Simplified Algorithm of the Step Response Identification Area-method

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Development and Research on China eastern product oil pipeline network simulation and training system

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The Modeling and Control of Dividing Wall Column

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Comparing with the conventional distillation sequence, dividing wall column can effectively save energy and equipment investment. But, the internal structure of dividing wall column is complex and it is susceptible to interference, so it is difficult for the modeling and control. This article studied the internal structure of DWC, and then built a mathematical model. The liquid split and side stream which are characteristic of the DWC were selected as manipulated variable, and the four temperature control structure was designed to control the temperature. PI controller was designed to control each control loop. The reliability of the designed control structure and the controller were verified by a lot of simulation experiments. The designed control structure and the controller can effectively solve the problem that DWC is hard to control, thus the best separation effect can be obtained.

Design of PLC-HMI-SCADA system based on ModbusTCP/IP

2015, 51(6):  0-0. 

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The paper introduces ModbusTCP/IP protocol and the communication between Supcon U6-200 PLC、MCGS touch screen TPC1062K and ForcecontrolV7.0 is achieved using ModbusTCP/IP. The configuration of both hardware and software is described. Taking a set of minitype electrical heating reaction system as an example, the procedures to design a friendly HMI with TPC1062K which is easy to operate locally and to design a SCADA system with ForcecontrolV7.0 on the supervisory computer are introduced.

Correction method for Online Calorimeter based on SVR

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In view of online calorimeter measurement lag, a correction method based on SVR is proposed to compensate online calorimeter value lags through SVR model nonlinear capabilities recover to compensating factor e. The simulation results indicate that the correction algorithm can effectively overcome online calorimeter measurement lag.Compare to the soft sensing technique for calorific value,online calorimeter compensated by correction algorithms owns much better approximation.

measurement and control of saturated Vapor dryness in Superheated boiler

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Measurement and control of saturated Vapor dryness in Steam injection boiler, is an important guideposts to improve oil recovery. With the development of technology, how to improve the Convenience operations and accuracy of the measurement at the dryness in Steam injection boiler and Research for the fuzzy control of the dryness ，which has become the trend of technology development. In this paper, the principle and method of steam dryness measurement are introduced firstly,。The paper emphatically introduces the method of fuzzy control and soft measurement model for Dryness in superheated boiler。Combined with the practical experience of heavy oil recovery in Xinjiang oilfield, the method and control of saturated Vapor dryness of Superheated boiler are effective in Xinjiang oilfield.

Information Technology

Similar research and application of Oil well dynamometer diagram

2015, 51(6):  0-0. 

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Indicator diagram of pumping wells is directly reflect the operation state of the rod pump wells, is the oil well production technical personnel master the situation first hand information. According to the reservoir in oil production is low and the formation fluid is not the law of extra low permeability and low permeability, in order to improve the utilization of oil well liquid production precision, usually figure take encryption acquisition practices indicator for oil well. Due to the characteristics of low permeability Changqing Oilfield, indicator diagram acquisition density is the largest, for every ten minutes, with the promotion of straight wells mode operation area, each data processing point needs to be within 10 minutes in the analysis and processing of about 600 indicator diagram of pumping wells, resulting in processing speed issues can not keep up, diagram Miss analysis about 1/3, greatly influenced the diagram yield accuracy. Aiming at this problem, through the study of indicator graph similarity, proposes a method of similarity indicator diagram processing, a better solution to the problem.

Research on network security architecture of digital oil and gas field

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With the continuous development of information technology and the integration of industry and IT, the construction of digital oil and gas field has become the new trend of the oil industry, efficient network and security structure is known as the foundation of the information transmission. This paper, starting with the unique needs of digital oil and gas field, carried on a thorough analysis of the network architecture and network security requirements, put forward a method of network partition based on function, and proposed an unique security strategy. In real application good effect have been achieved, it provides a new idea for the large oil enterprises to build the network and security structure.

Instrument and Meter

Type and Application of Desuperheater

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The function of desuperheater is to convert superheated steam into saturated steam or low temperature superheated steam. The working principle is to reduce the temperature of superheated steam by heat exchange between the warm water and the superheated steam, and eventually reach the heat balance. To select the suitable desuperheater through the caculation of desuperheater. Introduced the types of desuperheater, anaylized the factors of affecting the temperature reduction, and presented the problems about the selection and the installation of desuperheater, then to help you better understand and use it.

Brief Discussion On Selection And Application Of The Total Sulfur Content Online Detection Method In Gasoline

2015, 51(6):  0-0. 

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This paper introduces the newest standards for sulfur content requirements in motor gasoline, The testing methods for total sulfur content in gasoline, and the characteristics of the different analysis method is briefly described，as well as the corresponding characteristics and measurement range. Finally, discusses the application of Chromatographic +Flame Photometric Detector (FPD) in total sulfur analysis through a concrete application example.

Influence of diaphragm seal system on measurement of transmitter

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Diaphragm seal transmitter is usually used on pressure, diff.pressure, flow and level measurement. The diaphragm is designed to avoid capacitive sensing element and direct contact with the measured fluid, so that the capacitor element has a good, stable working conditions, but the diaphragm will have an impact on the measurement. This article analyze diaphragm size, flexibility，capillary length，diameter and the fill fluid, which can influence measurement of diaphragm seal transmitter, the article discuss how to choose these parameters reasonable, reduce the error from diaphragm seal factor and environment factor ,and make measurement more accurate.

Implement analysis using Measurement of natural gas flow by gas ultrasonic

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According to the latest standard 18604-2014 GB/T " Measurement of natural gas flow by gas ultrasonic", the application of ultrasonic flowmeter in gas flow measurement is done. Through the research on time difference ultrasonic flowmeter measurement principle and the content of the standard, thesis analyzes the field of ultrasonic installation technology conditions, introducs gas flow system constitute from the software and hardware; it verifies measurement datas through the data comparison method of ultrasonic, easy to supervision and inspection of the trade, in order to improve the level of management.

Innovation and Pratice

Select of Thermal Instrument in Furnace of Sulfur Recovery Unit

2015, 51(6):  0-0. 

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Sulfur recovery furnace temperature measurement accuracy is very important, and is directly related to the effect of acid gases and combustion equipment safety. This paper describes the principle of blowing-type thermocouple and infrared thermometer , and make a contrast between two kinds of instruments comprehensively and systematically. For sulfur recovery unit burner specific conditions and requirements of the temperature measurement, infrared thermometer because of its high accuracy, fast corresponding signal width can be replaced online features, better able to meet the sulfur recovery process furnace requirements and the requirements of high temperature combustion characteristics. Therefore, the infrared thermometer is a good selection in sulfur recovery unit key, which is a reference instrument selection for the designers .

Application of Photoionization Detector in Toxic Gas Detection

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Control scheme and interlock protection of HP steam drum for EO reactor

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HP steam drum as the key equipment of EO reactor cooling system, the control scheme is very important to EO reactor cooling system. It is a three-element control system. In the more common two element control, the steam being generated is on pressure control with no regard to flow. The level controller adds boiler feed water. This is acceptable for the normal steam boiler, since a rise in level usually means less steam being generated and more than enough water in the system. For the EO reactor, however, a rise in level, particularly a rapid rise, may mean a higher rate of reaction and greater steam generation. Under these circumstances, more water is required. This is accomplished by a flow meter on the steam flow and boiler feed water make-up. When the steam flow measurement measures increased steam flow, it calls directly for more feed water irrespective of the momentary level in the steam drum. Once the flows in and out have been balanced to the new conditions, the level controller makes the necessary adjustments to restore the water level in the HP steam drum to its normal position. In case of low level in the HP steam drum or high pressure of the generated HP steam will trip the system.