Monitoring of technological environments at petrochemical plants as a means of ensuring their safe operation

2021 ◽  
pp. 162-168
Author(s):  
R. N. Bahtizin ◽  
◽  
S. N. Zubin ◽  
A. B. Laptev ◽  
D. A. Laptev ◽  
...  
Keyword(s):  
Corrosion Rate ◽  
Regression Model ◽  
Oil Refining ◽  
Circulation System ◽  
Corrosion Activity ◽  
Divalent Metal Ions ◽  
Recycled Water ◽  
Reservoir Water ◽  
Evaporation Coefficient ◽  
Equipment And Pipelines

The cooling recycled water of petrochemical enterprises is characterized by high corrosion activity, unstable composition and, due to the evaporation of water in cooling towers, a constant increase in the concentration of dissolved salts, suspended particles and organic pollutants. Some of the salts formed by divalent metal ions fall out in the form of deposits, and the water is satu-rated with chlorine, sulfate, phosphate, and carbonations and becomes corrosive. At the same time, the corrosion activity of reservoir water varies widely depending on the saturation of cer-tain ions and other ingredients. It is established that monitoring the composition of recycled water and determining the corrosion rate of equipment and pipelines, carried out within 1-2 months, allow us to build a regression model of the dependence of the corrosion rate on the technical parameters of water, with which we can accurately calculate the values of the corrosion rate on the evaporation coefficient. Monitoring of technological environments and optimization of their composition through mathematical modeling will significantly improve the safety of equipment and pipelines operation at oil refining enterprises. Keywords: corrosion inhibitor; scale inhibitor; biocide; water circulation system; evaporation coefficient; monitoring; cooling water; regression model.

scholarly journals Optimization of the Composition of Silicone Enamel by the Taguchi Method Using Surfactants Obtained from Oil Refining Waste

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3619
Author(s):  
Vitaliy Tyukanko ◽  
Alexandr Demyanenko ◽  
Antonina Dyuryagina ◽  
Kirill Ostrovnoy ◽  
Marianna Lezhneva
Keyword(s):  
Corrosion Rate ◽  
Taguchi Method ◽  
Optical Microscopy ◽  
Oil Refining ◽  
Properties Of Coatings ◽  
Two Component ◽  
Dispersant Additive ◽  
Aluminum Pigment ◽  
Specific Amount

The aim of this work is to optimize the composition of a two-component silicone enamel consisting of an aluminum pigment and a polyphenylsiloxane polymer to obtain the maximum dispersion of the pigment in the coating. The following products were used as surfactants: AS-1, PEPA, and Telaz. To assess the effect of surfactants on the dispersion of the pigment, computer-optical microscopy was used. The results of the studies showed that all the studied surfactants cause an improvement in the dispersion of the pigment. According to the degree of influence on the dispersion of the pigment, surfactants can be arranged in a row: PEPA > Telaz > AS-1. When the PEPA content in the enamel is 0.25 g/dm3, a decrease in the diameter of the pigment particles by 46% (from 26 to 14 microns) is recorded, with an increase in their specific amount by 2 times (from 258 to 550 pcs). Optimal enamel compositions allow a reduction in the corrosion rate by 11 times (from 0.6 to 0.053 mm/year) and improvement to the decorative properties of coatings (roughness, gloss, etc.). The effectiveness of the AS-1 product (obtained from oil refining waste) as a dispersant additive in silicone enamel has been proven.

Temperature Character Analysis of RCC Based on Stepwise Regression Model

2012 ◽  
Vol 238 ◽  
pp. 268-271
Author(s):  
Yu Qing Zhao
Keyword(s):  
Regression Analysis ◽  
Regression Model ◽  
Stepwise Regression ◽  
Stepwise Regression Analysis ◽  
Gravity Dam ◽  
Practical Calculation ◽  
Analysis Model ◽  
Related Factors ◽  
Reservoir Water ◽  
Basic Principles

The basic principles and ways of stepwise regression analysis is explained, taking the case of Jiangya gravity dam. On the basis of the temperature monitoring data, the optimal regression equation of the dam temperature is established gradually by the dam bedrock temperature, air temperature and reservoir water temperature and other related factors. It is proved that stepwise regression analysis model is reasonable and the simulation is fairly well with high precision. The stepwise regression model can be used to analyze the concrete temperature. The work provides the practical calculation basis for the monitoring of dam safety running.

Assessment of the steel corrosion rate at the infrastructure facilities of hydrocarbon deposits as a function of the mineralization and temperature

2021 ◽  
Vol 87 (6) ◽  
pp. 41-44
Author(s):  
R. K. Vagapov ◽  
A. Yu. Prokopenko ◽  
I. S. Tomsky
Keyword(s):  
Corrosion Rate ◽  
Steel Corrosion ◽  
Gas Production ◽  
Safety And Reliability ◽  
Equipment And Pipelines ◽  
Gas Fields ◽  
High Degree ◽  
The Impact ◽  
Hydrocarbon Deposits ◽  
Oil Gas

Active and promising hydrocarbon deposits, including those on the sea shelf, are often characterized by an increased content of corrosive carbon dioxide and hydrogen sulfide. Corrosive gases present in the produced crude is a serious threat to the safety and reliability of the equipment and pipelines operating at gas production facilities. We present the results of assessing the dependence of the steel corrosion rate in the presence of CO2 on the salinity and temperature. The experimental data were processed using the methods of mathematical statistics. It is shown that the obtained dependences provide calculation of the corrosion rate with a high degree of reliability. The impact of each factor (salinity and temperature) on the steel corrosion rate was evaluated separately. The results obtained can be used to control and predict the danger of corrosion destruction of the infrastructure facilities of oil – gas fields.

CONTROL OF OBJECTS OF OIL REFINING MODEL

2017 ◽  
pp. 78-82
Author(s):  
L. G. Tugashova ◽  
K. L. Gorshkova
Keyword(s):  
Genetic Algorithm ◽  
Regression Model ◽  
Dynamic Model ◽  
Nonlinear Dynamic ◽  
Control Model ◽  
Oil Refining ◽  
Nonlinear Dynamic Model ◽  
Control Actions ◽  
Main Components ◽  
And Control

The approaches to improve the management of processes of oil refining. The description of the control model and the adjustment of the coefficients of the controller by using genetic algorithm. Selected basic adjustable parameters and control actions. The main components of the control circuit for the models are: limitations of the regression model, nonlinear dynamic model, the unit of optimization.

Features of the Magnesium Alloys Corrosion in the Chloride-Containing Media

2014 ◽  
Vol 213 ◽  
pp. 143-148 ◽  
Author(s):  
Andrey S. Gnedenkov ◽  
Sergey L. Sinebryukhov ◽  
Dmitry V. Mashtalyar ◽  
Sergey V. Gnedenkov
Keyword(s):  
Corrosion Rate ◽  
Magnesium Alloys ◽  
Corrosion Activity ◽  
Secondary Phases ◽  
Composite Polymer ◽  
Corrosion Stability ◽  
Electrolytic Oxidation ◽  
Order Of Magnitude ◽  
Galvanic Couples ◽  
Plasma Electrolytic

A greater corrosion stability of the MA8 (Mg-Mn-Се) alloy as compared to that of VMD10 (Mg-Zn-Zr-Y) magnesium alloy in the chloride-containing solution has been demonstrated using the scanning vibrating probe method (SVP) as well as the methods of optical microscopy, gravimetry and volumetry. It has been established that the crucial factor of the corrosion activity of the samples under study consists in the occurrence of the micro galvanic couples at the samples surface. MA8 alloy contains less amount of the secondary phases (cathodic parts) relative to VMD10. The corrosion rate of the samples with coatings formed by the plasma electrolytic oxidation (PEO) method and composite polymer-containing coatings at the surface of various magnesium alloys has been measured. It has established, that PEO-coating decrease the values of the corrosion rate in several times (more than one order of magnitude for MA8 and more than 2 times for VMD10) in comparison with bare alloys.

Modélisation non paramétrique de la relation entre les caractéristiques du vent et la différence de niveaux sur un grand réservoir

2003 ◽  
Vol 30 (4) ◽  
pp. 684-695 ◽  
Author(s):  
Mario Haché ◽  
Marc Durocher ◽  
Bernard Bobée
Keyword(s):  
Regression Model ◽  
Water Level ◽  
Nonparametric Regression ◽  
Performance Criteria ◽  
Wind Effect ◽  
Nonparametric Regression Model ◽  
Reservoir Water ◽  
Reservoir Water Level ◽  
The North ◽  
A Site

The natural inflow at a site is a key variable for optimal management of water resources, particularly for hydroelectric production. For sites with dams and hydroelectric powerplants, this variable cannot be measured directly, and the water balance equation is used to determine the quantity of water a site receives on its surface during a certain period of time. However, several errors affect the natural inflows computed this way. One of the principal sources of uncertainty for large reservoirs is the nonrepresentativeness of water level because of the wind effect. To quantify the effect of wind on the reservoir surface, a nonparametric regression model was used to relate the water level differences between several stations located on the same reservoir and the characteristics of the wind (direction and intensity). The study showed that the nonparametric regression model substantially improves the knowledge of the water level differences between several stations when there is presence of wind. With this model, it is possible to characterize the types of wind affecting the reservoir and to establish validation strategies for the data. The studied reservoirs are Outardes-4 and Gouin, two large reservoirs located in the north of the province of Québec, Canada.Key words: wind, reservoir, water level, nonparametric regression, natural inflow, performance criteria.

Metal Corrosion Problems and Countermeasures in High Conductivity of Circulating Water

2013 ◽  
Vol 333-335 ◽  
pp. 1841-1846
Author(s):  
Chang Shan Huang ◽  
Hui Wu Xu ◽  
Yu Shan Cheng ◽  
Jin Ying Wu ◽  
Mian Xue
Keyword(s):  
Corrosion Rate ◽  
Air Conditioning ◽  
Cooling Water ◽  
Water Circulation ◽  
Metal Corrosion ◽  
Circulation System ◽  
Stable Operation ◽  
Iron Corrosion ◽  
Circulating Water ◽  
Water Circulation System

Objective: Through the test of air conditioning cooling water circulation system and the electrical conductivity of iron corrosion velocity, find out the method of corrosion control measures; Methods: Rotating hanging plate method and conductivity meter and other cooling water test air conditioning system in different conductivity of metal iron corrosion rate; Conductivity results: Air-conditioning cooling water circulation system of more than 1900 μs/cm, metal corrosion rate less than 0.05mm/a, shall meet the relevant standards. Conclusion: Through the addition of corrosion inhibitor, scientific emission and control of circulating cooling water pH, conductivity decreased circulating water cooling, can reduce the corrosion of iron, to ensure the safe and stable operation of cooling water pipe and equipment.

scholarly journals Influence of hydrate formation and wall shear stress on the corrosion rate of industrial pipeline materials

2018 ◽  
Vol 62 (4) ◽  
pp. 121-128 ◽  
Author(s):  
L. Poberezhny ◽  
A. Hrytsanchuk ◽  
G. Hrytsuliak ◽  
L. Poberezhna ◽  
M. Kosmii
Keyword(s):  
Corrosion Rate ◽  
Gas Hydrates ◽  
Hydrate Formation ◽  
Joint Effect ◽  
Oil Refining ◽  
Two Phase ◽  
Industrial Pipeline ◽  
The Mathematical Model ◽  
Oil Gas ◽  
Pipeline Corrosion

Abstract In the modern systems of transportation of oil, gas and condensate, in the units of regasification of liquefied natural gas, two-phase flows play an increasingly important role in technological equipment used in the chemical and oil refining industry, power engineering and other industries. All available studies on the formation of gas hydrates were mainly focused on their ability to clog pipes along their entire length. While their ability to cause (initiate) corrosion remains virtually unexplored. Therefore, to increase the efficiency of industrial pipelines it is necessary to study the joint effect of hydration formation and stresses of friction on corrosion of the pipeline. The mathematical model of pipeline corrosion has been further developed by considering the influence of the gas hydrate. The influence of pressure, temperature on the speed of corrosion processes is estimated and it is shown that under the most unfavorable conditions the corrosion rate under the action of gas hydrates can increase several times.

scholarly journals Heating Performance of Solar Building Integrated Wall under Natural Circulation

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6288
Author(s):  
Xiaohang Shen ◽  
Nianping Li ◽  
Jiao Lu ◽  
Yongga A
Keyword(s):  
Solar Collector ◽  
Natural Circulation ◽  
Great Influence ◽  
Cold Season ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Circulation System ◽  
Recycled Water ◽  
Solar Heat ◽  
Heat Efficiency

This paper presented a building façade combined with photothermal technology where a water circulation system, including a thermal radiation plate and a solar collector, was installed. When heated by solar radiation, the water in the system transfered part of the solar heat to the room through natural circulation by buoyancy caused by density difference. During the cold season, the solar heat efficiency of the façade under natural circulation was studied through experiments and numerical simulations. The results show that the simulated values of the model established by MATLAB were in good agreement with the experimental values. Under the action of natural circulation, good solar energy utilization efficiency could be obtained by the façade. When solar irradiance was 1100 W/m2, the heat gain of the solar collector was 1672 W, of which the heat delivered to the recycled water and supplied to indoor was 1184 W, and the solar heat efficiency could reach 71%. Both the pipeline impedance and the height difference between radiation plate center and solar collector center had a great influence on temperature change of water supply in this system, whereas had little impact on thermal supply and solar heat efficiency of this system.

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