Automation in Petro-Chemical Industry

Application Explore of SIL Grading Technology in Liquid Ammonia Tank Farm

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

This paper takes liquid ammonia tank farm as an example, Through HAZOP analysis and other risk analysis methods, all potential risk scenarios of the system are identified. At the risk assessment stage, the scenarios identified by the HAZOP analysis are semi-quantitatively analyzed through SIL grading. The consequence severity level and the failure probability when the independent protection layer is required are evaluated to determine the system's SIL level requirements.. After choosing the SIS system, SIL is used to check that the SIS system meets the requirement of SIL grading. By above methods, the identified risk of process can be reduced to the reasonable scope.

Design and Application of Oil Depot Safety and Security Warning Platform

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

In order to improve the safety and security management level of the whole reservoir area, a set of integrated platform was built to realize information sharing and linkage control among various subsystems.With the help of platform tools, the logical process of plan response, the analysis and judgment of alarm events and the active management function of the system are realized, and the safety and security regulations and rules of the reservoir area are transformed into practical operational steps or business processes, and the time and energy of the management personnel are invested into key tasks.

Fault Analysis and Prevention Measures for Cathodic Protection System of Buried Gas Pipeline

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

The corrosiveness of the soil and the interference of AC and DC stray currents have made the corrosion of buried oil and gas pipelines more and more concerned by the industry. Forced current cathodic protection is one of the important anti-corrosion measures adopted for oil and gas pipelines. And if the cathodic protection system fails, it will greatly affect the overall cathodic protection effect of the pipeline. Taking the Shihua Natural Gas Pipeline as an example, the fault is analyzed and eliminated through the cathodic protection system equipment, the effectiveness of the cathodic protection, and the ground resistance of the anode floor, and corresponding effective measures are taken to repair it in a timely manner, which ensures the buried gas transmission. The normal operation of the pipeline has important practical significance.

Prevention and Measures of Water Hammer in Coal Gasification Plant

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

This article first describes the water hammer phenomenon that occurs in coal gasification plants and the damage caused by water hammer to processes and instruments. It analyzes and deduces the cause of the water hammer phenomenon through the phenomenon, starting from the root cause of the water hammer phenomenon, and explains the elimination Or ideas and methods to slow down the water hammer phenomenon, and put forward measures and suggestions for improving instrumentation equipment.

Analysis and Improvement of Water Hammer Advanced Protection Logic Function for product oil pipeline

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

Abstract: Analysis on the rationality of the logic settings of the water hammer advanced protection aim at product oil pipeline. Based on the two typical accidents of misoperation of the main line valve and the RTU valve room actuator in the in oil pipeline station, the corresponding water hammer protection control logic is functionally analyzed, combined with the operating characteristics of the petroleum product pipeline to optimize the water hammer protection control logic. Low reliability equipment is identified through the failure verification for related equipment, and specific measures to increase reliability of low reliability equipment is proposed, effectiveness of the product oil pipeline water hammer advanced protection function is increased.

Design and Practice of Double Flanges Differential Pressure Transmitter in level measurement

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

The Double Flanges Differential Pressure Transmitter is widely applied with its simple theory, reasonable structure, high precision, convenient installation, easy operation and maintenance. In this paper expounds the principle, application and calculation of the Double Flanges Differential Pressure Transmitter which is used in measuring level, and shares attentions in selection and installation solution.

Research Prospect of Fine Chemical Process and Equipment Detection and Monitoring Technology

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

This paper briefly analyzes the existing problems and challenges of the current fine chemical production process and equipment detection and monitoring technology, and systematically looks forward to the development trend of the fine chemical production process and equipment detection and monitoring technology. The main research trends of fine chemical process detection technology are: soft sensing technology based on mathematical model estimation; virtual instrument technology based on computer for process parameter data acquisition, data processing and display recording; machine vision technology based on digital camera and digital image processing for process parameter detection; process analysis and detection based on spectral detection and chemometrics methods Technology; as well as the operation condition detection technology of process equipment based on fluoroscopy. The main research trends of fine chemical process and equipment monitoring technology are comprehensive statistical process control of production conditions and production quality, and comprehensive safety protection control of production process.

Discussion of patrol system design in petrochemical enterprises

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

The petrochemical industry is a continuous production process industry, and it is highly dangerous. Patrol is an important measure to ensure the safety, stability and long-term operation of process unit. However, petrochemical enterprises are currently facing a situation in which patrol system design basis cannot be found. Based on the design experience of multiple previous projects, the author explores the design of patrol system for petrochemical enterprises, including functional design, scheme selection, handheld patrol device configuration, and patrol information point design. And then the new type patrol system for petrochemical industry in the future was prospected. At the end of the article, the author puts forward his own suggestions for the problems faced by the current petrochemical enterprise patrol system design.

Discussion and practice on Unmanned Patrol Inspection Model of Natural Gas Purification Plant

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

The Application Of Radioactive Level Meter On SINOPEC countercurrent moving bed reforming

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

Continuous reforming is one of the typical units in petrochemical production,which produce reformate oil for blending high octane gasoline or important feedstock of downstream aromatics unit,and the by-products is mainly high purity hydrogen. The core part of the device is catalyst continuous regeneration unit.It is necessary to select appropriate solid level instruments in relevant equipment to measure the catalyst level accurately. Actually the radioactive level meter is widely used for the measurement of catalyst particles level.The paper introduces the basic principle, equipment configuration and operation requirements of radioactive level meter in detail,and discuss the typical application of radioactive level meter in SINOPEC countercurrent moving bed reforming.

Discussion on instrumentation engineering design in extremely cold region

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

Abstract：In recent years, many petrochemical projects have been built in extremely cold areas, and the extreme environmental low temperature has brought new challenges to instrument design.In the field of instrument design, the existing standard specifications often focus on the temperature of the measuring medium, and often ignore the impact of the ambient temperature on the instrument system itself.In view of this problem, several problems that should be paid attention to in instrument design in extremely cold area are discussed.From the perspective of instrument measurement principle, installation location, weather resistance and material selection, a suitable instrument selection scheme is adopted to improve the reliability and safety of the instrument system in the extremely cold environment by comprehensively considering energy saving, emission reduction, easy maintenance and certain economy.Then, from the aspects of cable selection and instrument protection, the selection principle of cable in extremely cold area is analyzed and discussed, and the scheme of instrument insulation and heat tracing is recommended, so as to guarantee the long-term stable operation of the device.

Discussion on design scheme related condensation oil tank pressure control

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

Low pressure spherical tank is a common pressure vessel for condensation oil storage in petrochemical plant, the stability of the tank pressure control, is not only the need of the enterprise to ensure safety in production, but also reduce VOCs emissions, environmental protection and energy saving requirements. Combining with engineering practice, the two tank pressure control scheme respectively are introduced in detail, and gives some suggestions on optimizing.

Control System Design of the Experimental Converter

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

The new control system is designed for the problems of backward control mode, low efficiency and lack of interlock protection of the original converter. This paper expounds the design ideas and methods from four aspects: hardware system, software design, application of the instrument, HMI. The system adopts the control mode of "PLC + intelligent instrument" to realize the converter's data acquisition, operation control, interlock protection and switching of various operation modes. This paper introduces in detail the application of S7-200 smart sequential control function in software design under the fully automatic mode. It has been proved that the newly designed control system has perfect functions, simple operation, stable operation and multiple improvement of scientific research efficiency.

Application of non-contact magnetic detection technology on Buried Pipelines

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

The non-contact magnetic scanning technology is a newly developed detection technology outside the buried pipeline. It can identify the abnormal stress by detecting the change of the magnetic field intensity of the pipeline, and can determine the defects on the pipeline without contacting the pipeline, so it has a strong pipeline integrity detection ability. The non-contact magnetic scanning is applied to a heavy crude oil connecting pipeline of Northwest Oilfield Company. The test results show that the defect classification accuracy of the non-contact magnetic scanning technology is 85%. The technology has a wide detection range, which can detect the corrosion, suspected crack, stress deformation and other defects inside and outside the pipe, and can make up for the shortage of internal detection to a certain extent. It has great development potential in corrosion detection of buried pipelines.

Continuous Emission Monitoring System Application in the Measurement of Boiler Flue Gas

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

Continuous emission monitoring of pollutants in flue gas emitted from stationary sources is very important for atmospheric protection. This paper introduces four components and functions of the continuous emission monitoring system for pollutants in flue gas emitted from stationary sources, three methods of measuring gaseous pollutants, as well as the working principle of infrared gas analyzer. Taking the monitoring of boiler flue gas emission in an Iso-Nonanol (INA) plant as an example, this paper briefly introduces the measurement methods of flue gas parameters such as temperature, pressure, flow, etc., expounds the composition of sampling probe and sample conditioning system and the functions of each component when the direct extract sampling method is applied to the measurement of gaseous pollutants, as well as the use of multi-component gas analyzer, and emphasizes the issues to be paid attention to in design.

The finite element analysis of the magnetization structure of oil & gas piping magnetic flux leakage detector

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

Magnetic flux leakage inspection is one of the most common technology inspection projects. Due to the limit of piping diameter size,the excitation structure size will be affected by multiple factors such asthe intensity of magnetic saturation, the detection sensitivity, the accessibility,etc. Established a three-dimensional finite element analysis model of different size parameters, calculate the radial magnetic flux density distribution curve of leakage magnetic field of the defect.Analyzed the influence of the permanent magnet width , thickness of the permanent magnets, and the distance between two poles, provide the necessary theoretical basis for the optimal design of magnetization structure.

Construction Status and Development of long-distance Pipeline Integrity Management Information System

2020, 56(4): 0-0.

Asbtract ( )

Related Articles | Metrics

There are many high consequence areas such as densely populated areas, nature reserves and water sources along the long-distance pipeline in China. Once an accident occurs, it will have a serious impact on the life, property and ecological environment around the pipeline. As an active preventive risk management, integrity management of oil and gas pipeline is an effective means to prevent and control pipeline risk accidents. The construction of long-distance pipeline integrity management information system, which combines the theory and practice of integrity management, is an important means to avoid the risk of pipeline and realize the safe and reliable operation of pipeline. The construction statuses of integrity management information system in data management, risk monitoring, operation management, risk assessment and so on in domestic and foreign pipeline enterprises is summarized. The shortcomings of the system construction in China through comparative analysis are found out. Combined with the current situation and current situation, the future development direction is put forward.

Table of Content