Automation in Petro-Chemical Industry

Anlaysis on Thermowell Performance calculation

2019, 55(6): 0-0.

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According to the application status of the thermowell in Process industry and the new requirement in ASME PTC 19.3 TW-2016/2010, This Paper shows the necessity of performance calculation of thermowell and the considerations on the performance calculation for the conventional thermowell. This paper also introduce the attentions which shall be paid for the performance calculation and the application of unconventional thermowell.

Closed-loop regulation method of gas station vapor recovery air to liquid volume ratio

De-Xin XIU

2019, 55(6): 0-0.

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It’s difficult to maintain vapor recovery air to liquid volume ratio stable by mechanical regulation.In order to solve the problem,feedback-based A/L ratio closed-loop regulation is developed.By means of real time monitoring of A/L ratio and regulation of variable frequency vacuum pump,the A/L ratio tends to be a target value.The system of A/L ratio and regulation was tested in gas station,the test results indicate that the volatility of A/L ratio significantly decreases,the stability and qualifying rate are obviously improved.

Concrete application of condition monitoring in maintenance of centrifugal compressor

2019, 55(6): 0-0.

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In order to solve the problem of vibration ultrahigh of two centrifugal compressors in Yulin Station of Yulin-Jinan gas pipeline.In this paper, using condition monitoring technology, the vibration signals of compressors are comprehensively analyzed by various chart, and the aerodynamic performance of the compressors is calculated. The cause of the vibration fault is the imbalance of the rotor caused by the rotor scaling. Meanwhile, the data before and after maintenance are compared. On the basis of fault diagnosis, the compressor was disassembled and repaired, and the vibration level of the compressor was restored to normal. The practicability and effectiveness of condition monitoring technology in the maintenance of centrifugal compressor were verified. The treatment of the problem has certain reference significance for the diagnosis and maintenance of similar equipment in the future.

Development and Application of Intelligent Factory Big Data Analysis Platform Software

2019, 55(6): 0-0.

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Abstract: The realization of intelligent production has become a very clear development goal of the petrochemical industry. Yanshan Petrochemical Company is in the forefront of the industry in the construction of intelligent factories, in the three-tier platform of traditional petrochemical enterprises (process control layer, production execution layer, operation On the basis of management, a big data analysis platform was built, and the instrument predictive maintenance system was developed and successfully applied to the site. By monitoring, collecting and analyzing the real-time status parameters of the equipment, fault diagnosis, prediction of deterioration trend and generation of alarm information were performed. Obtain the risk of failure of the device at present, and the instrument and equipment management personnel can go to the site to confirm according to the type of fault diagnosed by the system, thereby minimizing the failure rate of the instrument and improving the operational reliability of the device.

Prospect of intelligent natural gas purification plant construction

2019, 55(6): 0-0.

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The technology of external corrosion detection and evaluation is optimized

Chang-Jing LIANG

2019, 55(6): 0-0.

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Application of multiparameter chemical instruments for Power plant of Boiler resupply water and Unit cycle soda

GenLai Zhou

2019, 55(6): 0-0.

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Three impulse control scheme of water level four types application analysis

2019, 55(6): 0-0.

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this paper analyzes the steam drum water level in the steam evaporation D M, furnace heat load disturbance when the water level and water W the object's dynamic characteristics, and the reasons of the "false water level", discussed in order to overcome the drum "false water level" single pulse, double pulse and three impulse the characteristics of the design of automatic control and the insufficiency.Focus on three impulse control scheme of four kinds of structure, composition, adder formula and the formula of the coefficient, plus or minus, characteristic and engineering application are analyzed.

The Core Technology of Accessory Electrical Products for Artificial Lift of Oil

2019, 55(6): 0-0.

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In order to make submersible electric pump more flexible to adapt to the changes of well conditions, the maximum liquid production can be obtained with reducing the operating cost and without readjusting the unit specifications. The inverter is usually used to drive the electric submersible pump on the ground, the working condition parameters uploaded by the underground monitoring device in real time enable the ground frequency converter to automatically adjust within the high efficiency area,the discharge and head of the underground submersible pump will be also changed. At the same time, it is seamlessly connected with the remote monitoring system to realize the digital management of oil wells. This paper analyzes the core technology of accessory electrical products for artificial lift of oil, including variable frequency driving technique, downhole sigal measuring and transmitting, surface data remotely transmitting, and also has intelligent control and fault diagnosis technique which is base on internet communication and expert system. These core technologies are really important for prolonging the running life of artificial lifts and promoting the efficiencies of equipments.

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