Automation in Petro-Chemical Industry

Application of industrial Internet in refining and chemical enterprises

2021, 57(1): 0-0.

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in order to solve the problems of irregular data collection, inconsistent system deployment, low integration of application systems, ineffective connection of upstream and downstream business information chain, and prominent information isolated island of a certain refining and chemical enterprise, an industrial Internet platform with the characteristics of refining and chemical enterprises was built based on the current situation of the enterprise. Data acquisition and centralized storage of instruments, equipment, devices and other physical entities under the enterprise's key management and control are carried out, and comprehensive analysis and processing are carried out with the help of special platform. The unified virtualization platform is planned, the standard data services, development services, middleware services and other common components are constructed, the corresponding data input and output standards are formulated, and the corresponding data support services are provided. At the same time, the enterprise focuses on the production planning, scheduling optimization, equipment management, safety control and other business data, modeling, process processing, and finally form the industry characteristic software platform. Through the construction of the platform, the whole process management and control of the enterprise's production and operation chain business is realized from the aspects of purchasing, planning, scheduling, and sales. At the same time, with the help of equipment big data analysis, unified alarm, emergency command and other platforms, the safety and stability of production and timely disposal are ensured. This paper explores the construction mode of industrial Internet platform based on "data + platform + application", which lays a solid foundation for the subsequent digital transformation of enterprises, focusing on the difficulties and pains of production and operation, in-depth promotion of information system application and active integration into the trend of digital economy.

Design and Implementation of Automatic Monitoring System for Coke Oven Gas Reformer

2021, 57(1): 0-0.

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Non-catalytic partial oxidation of coke oven gas is of great significance and technical support for the development of new energy chemical industry. Based on the construction requirements of an 182055Nm3/h coke oven gas consumption reformer project, a design scheme of automatic monitoring system is proposed in this paper. The scheme is composed of DCS, SIS and GDS systems, where DCS system completes basic production operation, converter load regulation and non-safety interlock; SIS system completes burner cooling water system and reformer safety interlock shutdown function; GDS system completes combustible / toxic gas leakage monitoring and alarming function on site. In addition, according to the process characteristics of coke oven gas reformer, the specifications of temperature monitoring, oxygen pipeline instrument and raw gas pipeline instrument are also designed. Finally, the design scheme can ensure the safe, stable, long, full and optimal operation of the unit, and has certain feasibility.

Type selection and design application of high pressure control valve for Residue hydrotreating unit

2021, 57(1): 0-0.

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With the decrease of petroleum resource and the aggravation of heavier and deteriorated of the crude oil, residue hydrotreating process has gradually become one of the important means of residue processing. The residue hydrotreating unit is characterized by hydrogen exposure, high pressure, high temperature and high H2S corrosion. The reasonable design and selection for high pressure control valve in key parts of residue hydraotreating unit is the key to the safe and stable operation of the unit. From the view of engineering design, this paper analyzes and explores the type selection and application principle of high pressure control valve in typical parts of residue hydrotreating unit.

Discussion on Instrumentation Cable Selection Problems in Petrochemical Plants

2021, 57(1): 0-0.

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Based on the characteristics of instrumentation cables in petrochemical Plant, this article discusses and analyzes the insulation material of instrument cables, the lay length of twisted pair, the shielding type, the armor layer and the identification color of the grounding wire, etc., And lists the details which need to be paid attention to. Then, this paper gives the selection suggestions, which have certain reference significance for the selection of instrumentation cables.

Investigation Distributed Control System in the Modularization of Oil and Gas Field Stations

2021, 57(1): 0-0.

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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.

An On-line Pump Efficiency Calculation Method Based on Convolutional Neural Network

2021, 57(1): 0-0.

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The calculation of oil well pump efficiency is an important work in oil field production management. To solve the problem of complex and slow calculation in the traditional method, a novel pump efficiency calculation method is proposed based on the convolution neural network. It can extract the feature map from the surface dynamometer cards by the convolution operation, fuse the well and pumping unit parameters and excavate the nonlinear relationship between the multi-source parameters and pump efficiency. In addition, the introduction of downhole pump indicator diagram as the prior knowledge assists the pump efficiency calculation in the accuracy improvement. The proposed method has been applied and tested on the oilfield site, and it is verified to have the high accuracy and fast speed which can support multi-well online calculation and meet the needs of oilfield digitization.

Intelligent analysis and control system of artificial lift for pumping wells and its application

2021, 57(1): 0-0.

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The intelligent control platform of pumping well is a knowledge base system which realizes the interconnection among well users, well information and well service. This paper integrates artificial intelligence technology into the construction of the user service interconnection knowledge base, and proposes an intelligent analysis engine which includes an oil production prediction model, a pump efficiency calculation model and a working condition diagnosis model, as well as a motor variable speed control method with the self-optimization. It solves the practical engineering problems such as online prediction of key production parameters and system adaptive efficiency improvement. The design and development of the proposed intelligent control platform for pumping wells has been realized by the JavaWeb. The system has been put into an oil field for on-site testing, and the test results show that the operating speed and accuracy of the system can support the online intelligent analysis and variable speed control

Reaction and Critical Control in Waste Acid Regeneration of C4 Alkylation

2021, 57(1): 0-0.

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Abstract： Under the condition of incineration at 1000 ℃,89~90w% waste sulfuric acid was injected into incinerator to burn and pyrolyse for the mixed acidic gas of SO2, O2 and H2O. The SO2 gas was converted to SO3 through oxidation, and the total conversion rate of SO3 was 99.9%. The regeneration recycling device of 16000 t/a waste acid was built using wet process. When the waste acid device was fed 1.881t/h, new sulfuric acid products were produced at 1.727t/h, the waste acid recovery rate was 91.81w%. During regeneration reaction of waste acid, it ensured the stable operation of waste acid device through critical controls and interlocks of pressure and temperature of waste acid regenerative incinerator, reactor inlet temperature, condenser inlet temperature, thermal salt system temperature and steam system pressure.

Application of safety production operation training system based on SIMIT simulation platform in Refinery

2021, 57(1): 0-0.

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Operation training system (OTS) has attracted much attention in today's refining and chemical plant staff training due to its realistic effect, low risk and flexible training methods. Based on the idea of "digital twins" in actual process flow, a set of integrated OTS system is established by using Siemens SIMIT automatic simulation and Aspen HYSYS dynamic simulation. Through the specific application of Qingdao Refining Gas Fractionation Unit, the good application of the system is verified value.

Application of PI real-time database in petrochemical enterprises

2021, 57(1): 0-0.

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Real-time database as a data integration platform for petrochemical enterprises，Integrates DCS, PLC, SIS, FGS, SCADA and other low-level control system data，also integrates LIMS business analysis system data，Realize the functions of monitoring flow chart production, EXECL report production, trend graph viewing, etc. So that the enterprise's decision-makers, operation managers, and production executives can timely and accurately grasp the production device dynamics. At the same time, through API, SDK and other interfaces to provide data to the upper management system (MES, ASM, ERP, etc.), you can further analyze and process the company's data to provide strong support for the company's energy saving and consumption reduction.

Research on intelligent operation and maintenance device of backup battery in petrochemical DC system based on information physical system

2021, 57(1): 0-0.

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Abstract: Abstract: This paper reports the safety monitoring system of DC storage battery based on remote intelligent operation and maintenance mode. The remote intelligent operation and maintenance mode has the advantages of one-time investment, long-term use, charging and discharging in groups, online operation to ensure personal safety and more effective maintenance of battery health. The remote intelligent operation and maintenance mode system has intelligent sensors and powerful information system, which can analyze and formulate solutions independently, and constantly optimize the model in solving problems, so as to realize rapid analysis and effectively screen out the faulty batteries. Through the intelligent operation and maintenance system, and the use of remote online checking capacity test can reduce the test workload and increase the security of maintenance, which is of great significance for the safe operation of DC system backup power supply.

Application of mass flow meter skid in crude oil custody metering on offshore platform

2021, 57(1): 0-0.

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A low gas-oil ratio offshore oilfield involves custody measurement between China and foreign oil company. First, through the economic comparison between the 15% water cut measurement case and the pure oil measurement case, it was recommended to choose the 15% water cut for the custody measurement. Then the mass flow meter skid design was introduced, including principles, size calculations and overall uncertainty calculations, etc. Finally, the recommended practices for improving the system accuracy are given for reference in similar engineering designs.

Application study of rectangular flowmeter in residual oil pipeline

2021, 57(1): 0-0.

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In the petrochemical industry, in view of the high viscosity and impurities contained in the residual oil transportation of the residual oil hydrogenation system, in order to obtain an accurate measurement scheme, a rectangular flowmeter combined with computational fluid dynamics (CFD)numerical simulation technology was used to perform three-dimensional simulation of the residual oil transportation pipeline. The calculation results of rectangular flowmeters under different working conditions were analyzed and compared through digital analysis technology and working condition calibration methods. It was found that the rectangular flowmeter had characteristics of accuracy, stability and reliability for the residual oil flow measurement in the residual oil hydrogenation system.

A design for on-line realization of replacement of air circuit accessories

2021, 57(1): 0-0.

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Conventional control valve pneumatic accessories do not have online processing function, once appear, fault, the valve into the accident, cause unit shipments, in order to quickly respond to an emergency, shorten maintenance time, design a kind of can realize online replace defective accessories gas path, through the experiment, the design can be completed online replacement valve fault accessories, thus shortening the time of valve shutdown, and the design of the operation is simple, have a certain promoting significance.

Phase Sequence Automatic Correction and Phase Failure Protection of Three Phase Power Supply for Electro Hydraulic Valve Oil Pump Motor in Gas Valve Chamber

2021, 57(1): 0-0.

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Electro-hydraulic linkage valve is widely used in city gas pipeline network, but the change of external electric environment often causes the alarm of valve state and even the burning of oil pump motor in hydraulic system.Combined with the damage engineering example of motor pump head of electro-hydraulic linkage valve in Shenzhen gas valve room, the reasons for the motor pump head burned by idling overheat of three-phase power supply phase sequence change in gas valve chamber are analyzed, and the scheme of automatic phase sequence correction and phase loss for three-phase power supply of electro-hydraulic valve oil pump is proposed.

Design of energy consumption calculation management system for natural gas purification plant

2021, 57(1): 0-0.

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Energy consumption calculation and analysis of chemical enterprises has always been a complex and very important problem. Based on this, the system adopts B / s and C / S mode, designs corresponding software for each work of energy consumption calculation and management of natural gas purification plant, and strengthens energy consumption management and analysis through information technology. The system standardizes the calculation and analysis method of energy consumption basic data, improves the energy consumption management level of natural gas purification plant, and improves the production efficiency as a whole.

Simulation of LNG tank leakage and diffusion based on Phast

Chang-Jing LIANG

2021, 57(1): 0-0.

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Abstract: at present, China's LNG engineering started relatively late, and there are few research results on LNG leakage. In order to solve this problem, DNV Phast software from norske veritas was used to simulate the leakage and diffusion of a LNG storage tank, and the gas diffusion, flash range and explosion overpressure of LNG under different working conditions were analyzed. The results show that the larger the leakage aperture is, the larger the influence range of gas diffusion is, and the larger the cloud width and downwind distance are. When the leakage aperture is 50mm, 100mm, and 150mm, the maximum downwind distance of vapor cloud diffusion is 7.8m, 18.8m, and 79.6m, respectively; the impact range of flash is 8.5m, 21.2m, and 88.6m, respectively; and the maximum distance of thermal radiation is 15.1m, 28.1m, and 73.8m, respectively. Strong wind is conducive to the diffusion of vapor cloud. In the process of storage tank site selection, the open area with good ventilation should be given priority. Mechanical ventilation such as explosion-proof fans can be installed on the windward side of storage tank to enhance air circulation. The research results can provide theoretical basis and support for the site selection, layout of LNG storage station and emergency management of tank leakage.

Fire and gas mapping application in safety monitoring system of LNG power plant

2021, 57(1): 0-0.

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The FGS mapping technology briefly introduced. The necessity of performance evaluation and FGS mapping is described, then effectiveness of safety monitoring system is introduced. The quantitative approach is used to evaluate the monitoring coverage of flame detection, flammable gas and tox gas detection, then the FGS design is to be verified and optimized. FGS mapping technology can improve detection coverage and the effectiveness of safety monitoring, is the effective way to mitigate risk from hazardous event.

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