Automation in Petro-Chemical Industry

Analysis and Corresponding Measures of Two interlocking actions in Ethylene Cracked Furnace

2024, 60(4): 0-0.

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2024, 60(4): 0-0.

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Research on the application of PIMS model in petrochemical enterprises

2024, 60(4): 0-0.

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Based on Aspen PIMS software, crude oil screening, device planning optimization, oil product blending, and economic analysis models are established. The functions of PIMS, the model establishment process and the company's application are introduced. Use the linear programming and recursive technology of PIMS to solve the profit-optimal solution for factory production, and finally present it to business managers in the form of a spreadsheet.

Research on surge line estimation and anti surge line control optimization of synthetic gas compressor

2024, 60(4): 0-0.

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The synthetic gas compressor is the core dynamic equipment of the synthesis plant. Whether its operation energy consumption can reach the design ideal state is affected by many factors, such as the deviation between the composition of the compression medium and the design, the influence of the pipe network resistance, the large deviation between the configuration parameters of the surge line and the given parameters of the unit performance curve, and the excessive surge margin of the unit make the unit operate near the anti surge line, It is necessary to check and compare the configuration data of the unit surge line and optimize the control of the anti surge line. On the premise of ensuring the stable and safe operation of the unit, through the calculation of the surge line data and the evaluation and optimization of the surge control program, the operation of the unit can be improved The reduction of energy consumption has far-reaching significance in operation cost and environmental protection, and provides reference for energy-saving optimization of compressor.

Exploration of factors affecting the calibration results of oil depot flow meters

2024, 60(4): 0-0.

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Based on the daily calibration work of flow meters in oil depots, this paper analyzes the condition of standard meters, whether to connect the oil gas recovery pipe during calibration, the inaccuracy of temperature measurement, and the impact of flow meter calibration points on the calibration results, according to the "Verification Regulation of Liquid Volume Flow Meter" (JJG-2010) suggestions are proposed.

WebGIS based integrated retrieval method for oil and gas exploration and development data

2024, 60(4): 0-0.

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Discussion on design of flowmeter for pilot plant

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The development of the petrochemical industry has entered a new era, the research and application of new technologies and new processes have become the focus of attention, and more and more pilot plants are being built. Due to the small production scale and low product output, the process material flow and process pipe size of the pilot plant are very small compared with the conventional industrial plant, which brings certain difficulties to the design and selection of the flowmeter. Based on the research of a polyolefin pilot plant, through the design practice of the engineering project, the design and selection ideas for measuring small flow conditions were summarized. The application occasions of several types of common flowmeters were obtained, and the selection suggestions were put forward to provide ideas for forming standardized design.

Discussion on the Application of Electronic Marshalling Control System

2024, 60(4): 0-0.

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In recent years, with the development of technology in the petrochemical industry, the requirements for investment cost, construction cycle, maintainability and intelligence are also getting higher and higher. In order to comply with this trend, the control system vender has introduced the electronic marshalling technology of general IO combined with local IO cabinet, replacing the traditional analog or digital cable with the optical fiber signal transmission channel in the system, and then realizing "light into copper back", which has greater advantages than the traditional wiring method. However, the relevant industry standard specifications do not have specific provisions for this new technology, resulting in different understandings among different designers. In view of this problem, combined with the actual project implementation experience, the signal design, layout design, power supply design, grounding design and other aspects are discussed, which has certain reference significance for the promotion and application of electronic wiring technology.

Special Requirements to Cryogenic Instrument Valves

2024, 60(4): 0-0.

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Abstract: Since the Cryogenic instrument valves always operate in severe cryogenic services, there are a lot of dedicated special requirements in valves fabrication and design area to ensure the functions in cryogenic service like the seat leakage rating, shell leakage rating etc.. There are many dedicated Cryogenic valve design and fabrication standards and codes in this area. The special requirements focus on valve type design, body &trim and the materials, bonnet &packing, Cryogenic test, fire proofing, painting, position indicator, spare parts, anti-static etc.. The foreign LNG projects special requirements to Cryogenic valves are introduced in this article. The special technical characteristics to the main Cryogenic valve vendors in home and aboard are analyzed. The differences have been listed. The promotion to the quality of the domestic valve vendor is expected and the nationalization to the area can be greatly accelerated.

Application of Petroleum Data Governance in Collaborative Research of Exploration and Development

2024, 60(4): 0-0.

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Bayesian Network Based Fault Diagnosis Method for Drilling site data collector

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This paper presents a fault diagnosis method of drilling data collector based on Bayesian networks, and a Bayesian network prediction method for drilling data collector faults is proposed. Firstly, using correlation function analysis (CF) and prior knowledge to determine fault nodes and causal relationships, preliminary constructing a BN structure.Next using the K2 learning algorithm and EM algorithm to optimize the structure and learn parameters of BN. Validate the obtained drilling data collector model with historical data. On the basis of fault diagnosis, multiple factors affecting the failure of drilling data collectors are comprehensively considered, temperature and humidity are confirmed as the influencing factors of equipment failure. A Bayesian network prediction model for drilling data collectors is established, and the mechanism of collector failure influence is simulated and analyzed.

Research on risk assessment of wellhead tree based on Bayesian network

2024, 60(4): 0-0.

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Abstract: In order to reduce the possibility of tree failure during service and ensure the normal and safe production of oil field. On the basis of building the failure tree model of the tree, the transformation of the failure tree model to the Bayesian network model is realized through the transformation relationship. Based on the analytic hierarchy process and fuzzy set theory, the prior probability of the root node is solved. By defining the time variation characteristics of the relevant nodes, the change of the failure probability of the tree at different times is obtained. The results show that the probability of tree failure is 1.24×10-2, in which the valve leakage is the highest, followed by flange leakage. The calculated results are consistent with the actual situation. Medium corrosion, fluid containing impurities, erosion corrosion, nut loosening and disc deformation are the main factors leading to tree failure, which should be paid attention to in field management. With the extension of time, the failure probability of tree increases slowly at first and then rapidly, and the risk of one-year tree increases sharply.

Analysis of Key Technologies of Long-distance Pipeline Leakage Detection

2024, 60(4): 0-0.

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The safety of long-distance pipeline operation is increasingly receiving attention from the country and the public, and the requirements for detecting small leaks and location accuracy are becoming higher and higher. It is necessary to develop efficient and accurate leak detection technologies. Introduced the classification method of pipeline leakage detection technology. Focusing on negative pressure wave method, infrasound wave method, distributed fiber optic detection technology, in-line inspection technology, and detection methods based on software/algorithm models, the detection characteristics, applicable scope, and engineering applications of each detection technology were elaborated. Based on the comprehensive evaluation indicators of pipeline leakage detection technology proposed in the American standard API RP 1175-2015 "Pipeline Leakage Management Procedure", the selection principles of existing pipeline leakage detection technologies are proposed. Finally, an analysis and outlook were conducted on the development trend and research focus of future pipeline leakage detection technology.

Design and application of special period control logic of natural gas station automatic distribution based on user data

2024, 60(4): 0-0.

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With the development of natural gas transmission and distribution pipeline system, the number of gas distribution users is increasing and the demand of gas supply is becoming more and more complex, the control logic of traditional gas distribution station can not meet the requirements of reasonable disposition and efficient utilization of natural gas. In order to construct the automatic transmission control logic and improve the efficiency and accuracy of transmission, this paper puts forward a transmission control logic based on the actual operation data of a station, based on user data to make up for the inhomogeneity coefficient method. The reliability of the special time-interval method is verified, and it is proved that the optimization rate of the special time-interval method is increased by more than 25% compared with that of the non-uniform coefficient method.

Study on Deformation Monitoring Technology of Desert Buried Flexible Pipeline Based on Vibration Extraction

2024, 60(4): 0-0.

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Aiming at the buried pipeline serving in the mobile sand dune area in the desert environment, facing the deformation problem that easily affects the normal operation of the pipeline, a desert buried pipeline deformation monitoring technology based on vibration extraction is proposed. First, analyze the deformation characteristics of the buried pipeline in the desert environment, and establish the finite element model of the buried pipeline in the desert; then perform the modal analysis of the curved pipeline under the action of fluid-solid coupling based on ANSYS; finally, use the distributed optical fiber sensing technology to collect the pipeline bending Abnormal vibration signal at deformation and deformation. The research results show that when the buried pipeline is bent and deformed due to the displacement of sand dunes, the internal fluid will couple with the pipe body at the bending deformation and cause abnormal vibration there. The abnormal vibration can be realized by collecting the abnormal signal through distributed optical fiber sensing technology. Monitoring, combining feature extraction and support vector machine can realize pipeline deformation monitoring.

Development of CO2 emission calculation system for process simulation

2024, 60(4): 0-0.

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A CO2 emission calculation system with full process material flow and thermal flow has been developed based on domestic chemical process simulation software. Firstly, the mathematical models of CO2 emission of full process material flow and thermal flow and the solution steps were established, then the CO2 emission calculation system was developed by using object-oriented C++ language and COM middleware technology, and finally the accuracy of module calculation was checked by using the actual data of two units of styrene ethylbenzene separation and cracked gasoline hydrogenation. The results showed that the average relative deviations (ARD) of the CO2 emission calculation results were 0.38% and 0.06%, respectively, and the simulation results match well with the actual industrial values, which indicated that the established CO2 emission calculation system was stable and reliable, and will play an important guiding role in the simulation calculation of CO2 emission processes in chemical processes.

Research and Application of Artificial Intelligence Efficiency Technology for Pumping Unit

2024, 60(4): 0-0.

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Control scheme and application of a gas mixer

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Aiming at the VOCs waste gas in the bunker gas of petrochemical industry, the device adopts a heat storage oxidation device to conduct in-depth treatment of the waste gas. The purified gas after treatment meets the existing standards and can be discharged through the chimney to meet the standards. The exhaust gas is divided into two sources, one is low-concentration exhaust gas with a flow rate of 80000m3/h and stable concentration. The other is the high-concentration exhaust gas with flow fluctuation range of 100 ~ 300m3/h, and the concentration is given by regular sampling of the chromatographic analyzer. In this paper, according to the characteristics of exhaust gas, a control scheme of mixed gas is developed to ensure that the total hydrocarbon before and after mixing is equal, and the flow rate of high-concentration exhaust gas is accurately controlled according to the flow rate of low-concentration exhaust gas.

Design and Application of MPC Controller for Heating Medium Furnace

2024, 60(4): 0-0.

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In response to the problems of large lag and multiple influencing factors in the heat medium furnace, based on process analysis and mathematical modeling, a heat medium furnace controller was established on the platform of the SUPCON PCU211 intelligent controller using the MPC multivariable predictive control algorithm, achieving precise control of outlet temperature and residual oxygen content, improving the automation level of the device, reducing operational intensity, improving the smoothness of the production process, and achieving considerable economic benefits.

Research on reliability maintenance strategy of program-controlled ball valve in S Zorb unit

2024, 60(4): 0-0.

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Based on the statistics of different failure modes of SPC ball valve in S Zorb unit, this paper makes FMEA analysis by using SPC ball valve body, Echo, actuator and solenoid valve as subsystems, according to the method of RCM logic decision, the maintenance strategy of program-controlled ball valve is worked out, which improves the operation reliability of program-controlled ball valve and reduces the unplanned outage of Lock Hopper system.

APPLICATION OF OPTICAL LMAGING SMOKE AND DUST ANALYZER IN CATAILTIC CRACKING

2024, 60(4): 0-0.

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Abstract: A catalytic device has applied an optical imaging fule gas analyzer to measure the content and distribution of catalyst dust in the three swirling flue gas.This article describes the working principle,structure,and working process of the optical imaging smoke and dust analyzer;Actual application and measurement results.Provide a new method for the determination of catalytic flue gas dust.

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