Automation in Petro-Chemical Industry

Principle of online Raman analyzer and its application in gasoline blending

2016, 52(1): 0-0.

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To improve the economic benefits of petrochemical corporations, more and more advanced process control systems are introduced to realize the accurate control for product quality and operation optimization. It is especially important for these systems to obtain the product quality information fast, accurately and reliably by online analyzers. The principle and technical advantages of Raman spectral analyzers are presented in this paper. For a domestic online Raman analyzer, the system configuration and its application in a gasoline blending process are discussed. Application results show that Raman spectral analysis technology can be widely applied in petrochemical, synthestic pharmaceutical and other industries, especially for the online compositional analysis of liquid mixtures, because of its rapidity and high accuracy as well as simple maintenance.

The Difference Analysis Between China and Russia Tank Operation Technology Standards

2016, 52(1): 0-0.

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Based on China petroleum strategy reserve and the development trend of large-scale storage tank, the necessity of avoiding tank incident was raised. The domestic scholar carried out the research on referring foreign standard to improve China standard, and Russia standard of high latitude permafrost regions Pipeline. The paper deeply studied the advanced idea of Russia tank operation technology standard, including tank safety mark and process operation card and level meter redundancy design and valve maintenance period and cleaning requirement on cold condition and safety requirement of tank oil product sampling operation and tank product water and rain water independent discharge and tank air concentration inspection position and inspection frequency. Finally, the suggestion of referring Russia tank operation standard to improve China standard was made.

Application of PDMS in Petrochemical Instrumentation Design

2016, 52(1): 0-0.

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PDMS (Plant Design Management System) is a database platform for three-dimensional (3D) collaborative design. With more and more extensive application of PDMS in petrochemical industry nowadays, the demand for collaborative design has increased. And the increased demand brings forward higher requirements for the instrumentation 3D design. The features, system structure, basic functions and the application in some petrochemical project of PDMS were introduced in this paper. The application prospect and superiority of PDMS using in petrochemical instrumentation design was also analyzed. Some problems were stated about traditional design model. Based on the practice of some petrochemical project, the paper has got a conclusion that using 3D design could improve work efficiency of petrochemical instrumentation design. Some re-development suggestions were submitted linking with the characteristics of instrumentation design.

Analyzer Selection of Oxygen Content In Tail Gas Which Generated By Alcoholized PVA

2016, 52(1): 0-0.

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In the process of PVA alcoholysis drying， O2 content maybe reach lower explosive limit when it reaches a certain concentration and mixs with Methyl alcohol、merhyl acetate、alkane, If it brings into contact with electrostatic spark，explosion maybe occurred .So O2 content in the drying machine is an important parameter。To make O2 content below lower explosive limit concentration，make sure that drying system Operates safely and steadily ,Oxygen content is mornitored real-time by adding on-line Oxygen Analyzers；at the same time，N2 content charged in the drying machine is controlled automatically。The article chooses few normal Oxygen Analyzers to compares in aspects such as measurement principles、perfor evaluation、installation、cost of onvestment and operating maintenance etc。 Finally， laster on-line Oxygen Analyzer pluged –in pipe mounting is choosed to mornitor real-time for O2 content in the drying machine，control automatically N2 content charged in the drying machine，realize the discharging standard of methyl alcohol and non-nethane hydrocarbon off-gas after drying。

DiscussiononThe Design of PDS System in The Polypropylene Plant

2016, 52(1): 0-0.

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In the polypropylene plantofUNIPOL process, the Products Discharge System (PDS) is related to the safety of the polypropylene plant with long-term and stable production.This paper introduces the technological process and characteristics of PDS system, describes in detailthe composition of PDS system and the key points of the valve type selection, it provides reference for the design of PDS system in the polypropylene plant.

The Automated Control System and Manufacturing Execution System for Petrochemical Refinery Tank Farm

2016, 52(1): 0-0.

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Abstract：Automated control system structure and functions used for oil tank farm in petrochemical plant are described through discussing some tank farm special issues and design methods. As inventory count and information management are special in tank farm, suitable instruments and tank data management unit should be take into account for inventory calculating and developing tank farm process control and management for refinery. The communication signals connection schemes for tank level instruments and motor operated valves are special introduced and the detail examples of instruments wiring are provided. It is also introduced that whole structure layout, functions and related signals for tank farm manufacturing execution system（TMES）. TMES’s basic hardware, software and functions are summarized. The design concept in tank farm automated control system and TMES engineering design should be reasonable equipped, functions completed, system structure level clear, and considered for control and management.

Design and Implementation of Neopentyl Glycol Process Control System Based on PCS7

2016, 52(1): 0-0.

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The design of Neopentyl Glycol production distributed control system is accomplished based on PCS7. To meet the requirement for this system, the system hardware, the network architecture, the hardware configuration, network configuration and programming design is finished by Siemens SIMATIC PCS7. The PC monitor interface is designed by WINCC. A complex ammonia flow control which can be changed between two control loops is realized. The circuit switching showed the flexibility of the program, making it more efficient for the process control. The system is safe, stable and easy to manage. Insuring the safety and stability of producing, the system will enhance the quality of product and the manufacturer’s capacity for producing.

Study and application of cascade control based on H_∞ infinity optimal sensitivity

2016, 52(1): 0-0.

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In this paper, a design for two-freedom controllers was proposed to handle volume objects in process industry. By using the IMC controller in the secondary loop, the quadric disturbance can be eliminated effectively and rapidly. Minimum sensitivity was used as the design criteria in the primary loop and the turning parameters of the primary controller can be obtained by H_∞ optimal control theory. It (The two-freedom controllers) can be simplified into the standard cascade control structure. The turning method proposed in this paper was embedded into the Global Script of WinCC, which is applied to “THJFCS-1 fieldbus system experimental device” to control the level of two-tank process by using S7-300 PLC. The experiment results showed faster response speed, smaller overshoot and better set point tracking performance can be obtained by using this algorithm.

Hybrid modeling and optimization of power plant boiler coal consumption and NOx emission

shuo LIU

2016, 52(1): 0-0.

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The reduction of pollutant emissions and coal consumption are so significant for today's power plants to protect the environment and save energy. For today's high pollution and high coal consumption status quo, the hybrid model of power plant boiler is proposed, the model based on BP and ANFIS. According to the requirements of environmental coordinated with energy saving, coal consumption and NOx emissions as the goal of a multi-objective optimization problem is presented. To optimize the test conditions use genetic algorithm (GA) based on this model and the optimization goal. The data of the simulation experiment is acquired from the boiler operation of a power plant, results show that the optimal operation parameters is obtained by optimization algorithm, and can also meet the requirements of lower coal consumption and reduce pollutants emissions so as to realize the optimization targets of the power plant energy conservation and emissions reduction.

Information system of Natural gas gathering and transportation based on ASP.NET

2016, 52(1): 0-0.

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Natural Gas measurement is an important basic work in the process of oil gas exploitation and gathering and transportation.With the construction of the digital oilfield, it is imperative to improve the efficient operation and scientific management of measurement work by using information technology. To get the management information system based on B/S model can make the manager decision-making quickly and accurately grasp the data information and running situatione of equipments. The development and use of the system to improve the level of measurement management and work efficiency.

Integrated Engineering of Instrument and Application

2016, 52(1): 0-0.

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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.

Research on influencing factors of online chromatograph chromatographic column temperature

2016, 52(1): 0-0.

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In the entire online chromatograph, the chromatographic column temperature control holds the very vital role to the accuracy of the results of the analysis, this article investigate the influencing factors of chromatographic column temperature and proposes the corresponding solution. The influencing factors of chromatographic column temperature was analyzed. The structure of the column system was improved by analyzing. And the chromatographic column temperature was controlled accurately through compensation.

Analysis of Safety Early Warning Technology for Pipeline based on the Technology of Distributed Fiber-Optic Cable

2016, 52(1): 0-0.

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Security situation in Central Asia is complex, in order to ensure the security of the pipeline, this paper analyses the situation of safety early warning technology for pipeline based on the technology of distributed fiber-optic cable. This paper summarized the current development of Safety warning technology based on distributed fiber-optic cable , researched the basic principle of detection and location of early warning system based on distributed fiber-optic cable, technology and methods on signal identification and processing. Considering the safety environment of the pipeline in Central Asia, this paper analyzed the advantages of adopting safety early warning technology based on distributed fiber-optic cable system and discussed the main technical problems.

Research on selection of custody transfer measurement system of FLNG

2016, 52(1): 0-0.

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The main custody products of FLNG, the new development engineering facility for deep and pelagic offshore gas fields, include LNG,LPG and natural gas condensate. As the loading port, FLNG trades with LNG carriers, LPG carriers and shuttle tankers. Custody transfer measurement system(CTMS) shall be arranged on FLNG for such products respectively. Normally, LNG carrier is used as the main system for CTMS , FLNG would be treated as a terminal and it figures would be used as a check of the LNG tanker figures. The research shows that: the static radar gauging CTMS is the main way for LNG by far, and flowmeter is still in research and trial . Only mass flowmeter and ultrasonic flowmeter is used as check meter in industry. Both static measurement and flow meters are used as CTMS for LPG and condensate, flow meters including ultrasonic and mass has higher accuracy comparing to the radar gauge.

Selection and Calculation for Level Instrument on Heat Boiler Steam Drum

2016, 52(1): 0-0.

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This paper mainly introduces level meter selection and the compensation calculation about the waste heat boiler drum level about the chemical plant, in order to give some reference and suggestions for the level control methods choosing. In the actual project, the use of the connecting device and the double flange has been used to measure the level of the drum and the effect is better.

The Research and Application of ProfiNet tTechnology in the Network Reform of the Kashi Iron and Steel Deep Water Well

2016, 52(1): 0-0.

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Steel production and living water all from the factory outside the deep water wells, once the deep water wells problems, will directly lead to factory production, the water can not supply. The original design of deep water wells automatic control system network fault prone, this paper to the deep well automation control system network to upgrade and transform, this paper on the use of ProfiNet technology in the network transformation, the in-depth research and discussion, and detailed introduction of the deep well network transformation of the specific process.

Successful application of wireless transmitter in chemical fertilizer plant

2016, 52(1): 0-0.

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Application of displacer valve in FMTP project

2016, 52(1): 0-0.

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Displacer valve is widely used to drain from the bottom of reactor and vessel. There are various structures, free dead space is its outstanding character. In FMTP project, the displacer valves of lowering type are used for catalyst discharging and highly applied to overcome the critical condition of sticky and abrasive catalyst in the vessels with agitators.

Application of Verabar Flowmeters in Boiler Feed Water UF RO System

GenLai Zhou

2016, 52(1): 0-0.

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