The Fourth Plenary Session of the 20th Central Committee of the Communist Party of China explicitly proposed the principle of adhering to intelligent, green, high-end and integrated development, charting the course for the petrochemical industry during the "15th Five-Year Plan" period. Fostering the organic combination of new technologies, new industries, and the full elements and processes of petrochemical industry and promoting the integration of the petrochemical industry with future industries are the key to cultivating new quality productive forces and achieving high-quality development in the petrochemical industry. This paper systematically analyzes the challenges faced by the petrochemical industry in integrating with future industries from three dimensions such as integration direction and boundaries, implementation pathways, and outcome forms. Based on six major directions of future industries and their key fields, it analyzes the specific pathways for the integration of the six major directions with the petrochemical industry. Furthermore, it proposes countermeasures and suggestions from perspectives such as data governance and model construction, restructuring of raw material systems and optimization of production processes, and deep integration of technological innovation and industrial innovation. The aim is to provide practical guidance for advancing the deep integration of the petrochemical industry with future industries.

High molecular polymers are widely used in the field of new materials, and their non-Newtonian fluid properties pose challenges to the calculation of engineering hydraulics pressure drop. The rheological parameters of oligomer non-Newtonian fluid and the calculation method of pipeline pressure drop are analyzed in this paper. The results show that the oligomer fluid exhibits the characteristics of non-Newtonian fluid and conforms to the characteristics of power law flow pattern. When the flow rate or average velocity of the oligomer fluid is given, the pressure drop gradient of laminar flow and the pressure drop of turbulent fluid can be calculated by the modified Blasius drag formula and the modified Karman drag formula.

When a vertical oil storage tank is on fire, the tank wall is directly exposed to the flame, causing rapid temperature rise and a sharp decrease in strength. The load-bearing capacity of the steel plate is severely impaired, so the reasonable design of fire cooling water system is very important. This paper focuses on fixed fire cooling water system for vertical oil storage tanks. By optimizing design parameters, nozzle selection and layout schemes, the safety of oil storage tanks has been enhanced, fire risks have been reduced, and engineering cost control has been taken into account. This provides a reference for similar engineering designs.

Taking the high-temperature blended asphalt storage tanks in a refining and chemical enterprise as an example, combined with the physical properties of asphalt and relevant environmental protection requirements, the tank farm process, pump configuration and control scheme for heating medium are clarified according to the feeding relationship between upstream and downstream units. For high-temperature heavy oil storage tanks, nitrogen sealing systems and oil and gas collection systems need to be equipped, and the pipeline installation design is introduced from the aspects of pressure safety relief, purging settings and stress analysis. The key points and difficulties in storage and transportation design of tank farm are summarized, which provide a reference for the design of tank farm related to deodorization treatment of high-temperature heavy oil storage tanks in the future.

Aspen HYSYS was used for dynamic simulation of powder conveying system among multiple reactors in gas phase polypropylene production process. The pressure-flow solver, event scheduling tool and control manager used in the simulation are described. The curves of powder flow and powder level changing with time are obtained. It provides a reference for the design of blowcase system.

A simulation study was conducted on the separation process of n-hexane/acetone azeotrope using a coupled method of liquid-liquid extraction and conventional distillation, with water as the extractant and Aspen Plus V11 as the simulation software. First, the operating parameters of the extraction process, such as the number of theoretical plates, solvent ratio, extraction temperature, and residual extractant, were investigated. Further optimization was performed on the feed plate location, total number of plates, and overhead operating pressure of the distillation column. Finally, the temperature of the circulating extractant and the recovery rate of n-hexane at the top of the extraction column were optimized to minimize the operating energy consumption of the coupled separation process for n-hexane/acetone. The simulation results showed that the operating energy consumption of the coupled system was minimized when the extraction column had 3 theoretical plates, a solvent ratio of 2.31 and a circulating extractant temperature of 15°C, and the distillation column had 35 theoretical plates and 33 feed plates, a reflux ratio of 2.66 and an overhead operating pressure of 0.01 MPag. Compared to using ethylene glycol monomethyl ether for extractive distillation to separate the azeotrope, this method can reduce the energy consumption by 19.5%, making it an environmentally friendly and more energy-efficient separation method.

 This paper discusses the background of engineering cost indices in the petrochemical industry, and elucidates the application value of index theory in constructing petrochemical engineering cost indices. Through a comprehensive review of domestic and international literature, the definition of index theory is clarified, and four essential elements of index compilation including representative items, formula, weights and base period are identified. The study comparatively analyzes various index compilation methodologies, including simple index method, aggregate index method, and Fisher index method. Ultimately, the optimal compilation approaches applicable to different categories of petrochemical engineering cost indices are proposed.

An expander is used to recover the energy released during the expansion of working fluid. In actual operation, the composition of working fluid may change continuously, so operating parameters must be adjusted in real time to achieve optimal energy recovery. This paper, based on an actual engineering case of working fluid lightening (i.e., an increase in the mole fraction of H₂ and a decrease in that of C₂H₄), employs an Aspen Hysys model to systematically analyze the factors affecting expander performance. The results indicate that when the working fluid lightens, relying solely on speed adjustment yields only limited improvements in energy recovery, whereas adjusting the mass flow rate can significantly enhance recovery efficiency. Additionally, using a two-stage series configuration can effectively prevent the impeller from operating at supersonic speeds, thereby improving both system stability and energy recovery performance.

As enterprises attach increasing importance to human resource management, constructing an efficient and comprehensive employee assessment system has become a crucial strategy for enhancing an enterprise's core competitiveness. Traditional assessment systems with single functions can no longer meet the refined management needs of modern enterprises. Therefore, this paper proposes an assessment system architecture based on multi-application integration. It delves into the development and implementation of the system, covering the realization of functions such as customized system configuration, employee annual work task declaration, evaluation by expert reviewers, and multi-dimensional data analysis and query. Finally, this paper summarizes the practical application effects of the system and provides an outlook on potential future improvement directions.

This study analyzes a 3000m³ CO₂ spherical tank under seismic fortification intensities of 6-degree (0.05G), 7-degree (0.1G, 0.15G), 8-degree (0.2G, 0.3G), and 9-degree (0.4G), adopting three methods including the current GB/T12337, the methodology described in reference [4], and finite element analysis (FEA). The horizontal stiffness, natural vibration period, seismic response coefficient, wind vibration coefficient and combined horizontal load of the spherical tank are calculated. The stresses of structural components such as pillars, tie rods (with the requirement of equal strength design for lug plates, dowels, and tie rods) and anchor bolts are calculated and checked. By comparing the calculation results of these three methods, it is found that the calculation results according to the current GB/T12337 standard differ greatly from those obtained through FEA. The calculation results of the reference [4] are similar to those of FEA and just meet the structural requirements of the GB/T12337 standard. Both the reference [4] and FEA methods indicate that the stress of pillars does not meet the requirements of strength and stability. The equivalent stress of pillars calculated by FEA is 47.2% greater than that calculated by the GB/T12337 standard. As the standard for spherical tanks is currently under revision, it is recommended that more precise computational methods should be adopted in this revision to ensure the safety of standard-designed spherical tanks under all operating conditions.

In traditional distributed control systems, field instruments are usually connected to the control room using multi-core cables. In large-scale projects, cable materials, construction volume and project costs are all substantial. Due to the bandwidth limitations, traditional instruments are no longer able to meet the requirements of current digital applications. This article systematically compares traditional distributed control systems with Ethernet-APL-based control systems in terms of system architecture, instrument loop and signal transmission. The advantages of Ethernet-APL technology can be clearly seen. The problems in traditional control systems such as excessive cable materials, large construction volume and high cost can be effectively solved, and signal transmission is no longer limited by the bandwidth of instruments, demonstrating the application advantages of this technology in industrial digitalization.

In the design of pipe supports and hangers, the selection of materials for supports and hangers in contact with the pipe body should be matched with the pipeline material. Considering that supports and hangers mainly play a supporting role in the pipeline system and do not have direct contact with the medium running inside the pipeline, the selection of materials for supports and hangers directly contact with the pipeline can be classified and optimized. In this paper, the chemical composition, mechanical properties, allowable stress and welding performance of 304 (S30408), 304H (S30409) and 304L (S30403) stainless steel materials are compared and analyzed. It is concluded that when the pipeline material is any one of these three stainless steels, 304 stainless steel can be used as the material for pipe supports in contact with the pipe body. In this way, a series of processes such as procurement, management, prefabrication and installation can be simplified, the corresponding cycles can be shortened, and the cost of materials, fabrication and installation can be effectively reduced, thus reducing the cost of engineering projects and offering great economic and social benefits.

This paper analyzes the principles of toxic hazard classification for pure substances and mixtures as outlined in GB/T 42594-2023 - Guidelines for Classification on Hazard of Medium in Pressure Equipment, and discusses their rationality and applicability to corresponding pressure vessel scenarios. This standard is compared with HG 20660-2000，HG/T 20660-2017 and GBZ 230 in terms of the classification of toxicity hazard degree of medium in pressure vessels. For the mixtures containing definite human carcinogens, two methods are supplemented to classify the toxicity hazard degree of medium. The toxicity hazard characteristics of benzene, ethylbenzene, butadiene, hydrogen sulfide and ethylene oxide are analyzed. The influence of the classification of acute toxicity hazard of medium and the grading of hazards of occupational exposure to toxicity according to GB/T 42594 on the technical requirements of pressure vessel manufacturing in petrochemical plants, as well as the effect resulting from significantly improving economic efficiency are expounded.

As a core enabler for the transformation and upgrading of the refining and petrochemical industry, smart petrochemical factory is currently at a critical stage of transitioning from localized optimization to holistic, enterprise-wide collaboration. Facing multiple challenges such as peak demand for refined oil products, overcapacity in chemical production, and accelerated substitution by new energy sources, refining and petrochemical enterprises urgently need to leverage smart factories to overcome the constraints of traditional operational models. By systematically analyzing key issues including model silos, information barriers and inefficient external data collaboration, this paper proposes an integrated “trinity” solution: a design-driven, full-lifecycle integrated model that achieves vertical integration across equipment, unit and enterprise levels, a horizontally oriented information integration bus centered on standardized data exchange, enabling end-to-end coordination across the entire industrial chain encompassing oil, gas, refining, chemicals, sales, storage and logistics, and a business application system focused on realizing the value of data assets, precisely addressing scenarios in strategic decision-making, production optimization and risk mitigation. Looking ahead, with the deep application of technologies such as domain-specific large language models for time-series data and industrial internet, smart petrochemical factories will accelerate the shift of enterprises from “production-driven” to “value-driven” operations, providing sustained momentum for building a highly efficient and agile next-generation operating ecosystem.