Automation in Petro-Chemical Industry

The Development Status of Pipelines In-line Inspection Technology and Standard Systems

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

China oil and gas pipeline industry has achieved great development, but pipe body defect and corrosion problem may lead to serious safe potential. Domestic pipeline has comprehensively enforecd integrity management procedure. The pipeline in-line inspection technology can determine the pipeline corrosion and crack defection and ensure pipeline safe operation for a long time．The scope and advantages and disadvantages and technological status and application of pipeline in-line inspection technology at home and abroad were expounded in detail, including deformation testing, and magnetic flux leakage testing, and ultrasonic testing, and electromagnetic acoustic testing.Defect types and defect detectiong threshold and quantitative accuracy of defect were the most important performance parameter of inner detector that pipeline operator concerned, and should be verified through excavation verification and traction test. Finally, the future development trend of pipeline inspection technology is prospected, including internal detection technology for crack defects and SCC, eddy current internal detection and cathodic protection current detection technology.

Design and Implementation of Energy Management System for Iron and Steel Enterprises

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

This paper introduces the application status of energy management system of iron and steel enterprises in China, and contrapose the Characteristics of Energy Consumption System for Iron and Steel Enterprises. Based on the Energy Management System (EMS) for careful analysis and summary, we completed the iron and steel enterprise energy management system architecture design and function development work. The aim is to reduce the energy consumption of iron and steel enterprises through effective management and optimization of energy use, and improve the competitiveness of enterprises. Key words：Iron and Steel Enterprises；EMS；Architecture design；Energy consumption

Application of Intelligent Simulation Plant Technology to Petrochemical Process Units

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

Based on unit life-cycle requirements analysis from refinery, intelligent simulation plant technology is developed and successfully applied to Hydrogen unit and Etherification unit in a refinery in China. This technology will be one of basic technology for Intelligent Plant Technology.

Design and selection of key valves for BDO unit

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

Absrtact 1,4-butadiene alcohol (BDO) is a basic organic chemical and fine chemical raw materials, widely used. developed rapidly in domestic in recent years. This paper briefly introduces the process route of the acetylene aldehyde method. According to the characteristics and special requirements of BDO control valve, with experience of practice, describes the selection principle of the key valves, also presented the reference for process and valve selection design for similar plant. The main valves involved are: acetylene shut-off valve, catalyst control valve and shut-off valve, high pressure hydrogen control angle valve and BDO solution high-pressure control angle valve.

Application of Dispatching and Centralized Control Integration In Large Petrochemical Power Grid

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

Dispatching and centralized control integration is an important technology for intensive operation of power grid. With the increase of petrochemical enterprises power grid scale, the integrated dispatching and control system platform supports the three level operation management framework of dispatching, centralized control and maintenance. This paper introduces the development of petrochemical power grid management and control system construction, expounds the architecture and critical technologies of dispatching and centralized control integrated system. The influence of the "big running" control mode of petrochemical power grid is also discussed.

Application of advanced control technology of 120TCFB boiler

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

Abstract: with the continuous improvement of industrial technology, the main task facing enterprises is to reduce energy consumption and ensure the long-term smooth operation of equipment. On the basis of realizing automatic control function, the production requirements of "card side" are more outstanding, so that energy saving and energy consumption and stable control can be realized to ensure the production and quality of products. Is under the request of the development of advanced control technology, the application of advanced control technology can solve the complex control in the process of DCS control implementation provides a better solution, and in 120 t CFB boiler have good application in process control, smooth control, to realize saving energy and reducing consumption, guarantee the quality of products, while increasing the economic benefit of enterprise, the effect is remarkable.

Self-tuning of PID parameters based on DCQGA

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

Abstract: Quantum genetic algorithm has better multi-objective optimization ability than genetic algorithm, and it has some advantages in PID parameters optimization. However, it is easy for standard quantum genetic algorithm to fall into local extremum and prone to premature convergence in late evolutionary stage. Therefore, a new method, Double Chain Quantum Genetic Algorithm (DCQGA) is proposed to tune the PID controller parameters. In this method, chromosomes are directly encoded by real-coded quantum bits, chromosomes are updated by quantum rotary gates. Chromosomal aberrations are obtained by using quantum non-gates. The direction of rotation of the quantum gates is determined by the determinant of the probability of the optimal solution and the current solution’s quantum bits. And the size of the rotation angle is adjusted by the adaptive strategy combined with the gradient information of the objective function. In this method, each qubit is considered as two juxtaposed genes. Each chromosome contains two juxtaposed genes, each of which represents an optimal solution. At the same time, the error absolute value time integral performance index is used as the minimum objective function of PID parameter selection to carry on the MATLAB simulation. Compared with the general genetic algorithm and standard quantum genetic algorithm, the results verify DCQGA has faster response speed and better Multi-objective optimization ability.

Zigbee In the Application of the alpine Oilfield Remote Monitoring System

Chang-Jing LIANG

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

Abstract: In oil field automation and remote areas such as the use of a wired connection (optical fiber) of the material strength and resistance to low temperature can not meet the site requirements, such as the use of the traditional GPRS signal is often signal interruptions, cannot guarantee the stability and reliability of the system. In view of this problem, in the alpine and remote oilfield areas, a wireless network cluster based on ZigBee and Micwell has been established. The remote and large-scale monitoring system of well station Oilfield Automation has been successfully implemented.

Development and application of on-line measurement device for water content of crude oil at wellhead

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

In view of the poor reliability and heavy workload of manual sampling and testing methods for water content of crude oil at wellhead, it can not reflect the change trend of water content of wellhead crude oil in real time，Developing the wellhead oil water content on-line direct measuring device.The device uses electromagnetic wave transmission method，acquires instantaneous water content signal by sensors，after the signal processing circuit is comprehensively processed and transmitted, the real-time monitoring of water content of wellhead crude oil is realized. The field test indicates the device is suitable for oil wells with water content of 0-100%，has high stability and high reliability，can accurately reflect the change trend of water content of wellhead crude oil，meets the need of fine management and data dynamic analysis of single well production in Oilfield.

The measurement scheme of small flow on-line non linear compensation for differential pressure flowmeter

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

The relationship between the differential pressure and the flow rate of the differential pressure flowmeter is nonlinear. The NURBS function is used in this paper to fit the discharge coefficient formula of standard orifice plate in the small flow measurement. The online compensation method are introduced in DCS and show that this measurement scheme is well to improve the measurement precision and increase the flow measurement rangeability.

The Implementation of SCADA Based Density Alarm Function of Long-distance Refined Products Pipelines

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

SCADA (supervisory control and data acquisition) is widely deployed in long-distance refined products pipelines, which is used to acquire real data and control field devices. The density of Refined Products is the key parameter for monitoring and dividing the boundary of mixture refined oil. The exiting function of SCADA cannot guarantee the special alarm function of density. This article mainly analyzes the problem of monitoring density, and how to develop a simple PLC program of density alarm to promote the efficiency of refined products transportation.

Application of Crude Oil Pipeline Leak Detection System Based on Negative Pressure Wave

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

In order to reduce the threat of personal safety, environmental pollution and property loss caused by pipeline leakage, and to improve the efficiency of pipeline operation, it is of great significance to install a set of technically feasible, timely and accurate pipeline leak detection system (PLDS). This paper introduces the methods of PLDS, describes negative pressure wave leak detection principle. The PLDS based on the negative pressure wave principle has the advantages of fast response, accurate positioning and less investment. Finally, PLDS architecture based on negative pressure wave is proposed and applied successfully in actual project.

Analysis of Extending the Life of Flow Meter for Blending Light Oil

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

The flow meter is used in process of blending light oil in Tahe Oil Field. Large pressure difference leads to short life of flow meter. To reduce leakage frequency, pressure reducing valve is designed. The device is located in the front of flow meter and realize the pressure drops by the capillary liquid channel, nozzle type and high pressure fine-tuning needle valve, which reduce the pressure in the front of flow meter and pressure difference, which can extend the life of flow meter for blending light oil. Abnormal case reduces 1 time and two valve core is saved in a well on the average by using pressure reducing valve of eight well in year 2015.

The design and application based on the domestic SCADA system platform in long distance gas transmission pipeline

2018, 54(2): 0-0.

Asbtract ( )

Related Articles | Metrics

The SCADA system of long distance gas transmission pipeline is not only related to information security，scheduling security and control security, but also directly affect the daily scheduling and control work, it has a great strategic significance, we must grasp its core technologies. During the localization process of SCADA system ，we designed five special solutions for the problems of clock synchronization， remote maintenance,entire network diagnosis, data filling, system-wide anti-virus. In the industry，we first presented and realized the data filling function based on IEC–104, it greatly improved the integrity of historical data,it has been successfully applied to tianjin LNG pipeline， it has positive impacts on the localization of pipeline monitoring system being popularized and applied in the future.

Table of Content