Ethylene Oxide (EO) is an important chemical raw material and traditional tank truck road transportation poses significant safety risks. Ethylene oxide piping transport offers substantial advantages in terms of safety, efficiency and stability. This paper first conducts a comprehensive comparison of three commonly used EO piping transport schemes from the perspectives of safety, one-time investment and operational convenience. For long-distance ethylene oxide piping transport, the loop piping transport scheme is prioritized. The paper then elaborates on the temperature control and safety measures for EO loop piping transport, addressing the engineering design challenges of long-distance EO piping transport based on ?the ethylene oxide properties.

An analysis of the current global energy consumption structure, natural gas consumption patterns and the current status of coalbed methane (CBM) extraction and utilization reveals that China's approach to CBM development and utilization is relatively limited with low utilization efficiency. This is particularly true for low-concentration CBM, which holds immense potential for development and utilization. Research on the reaction mechanism for the catalytic conversion of low-concentration CBM into syngas indicates that catalysts face issues of carbon deposition and sintering at high temperatures. However, these problems can be mitigated or delayed through appropriate methods, enabling the industrial production of syngas via the catalytic conversion of low-concentration CBM. China vents approximately 19 billion cubic meters of low-concentration CBM annually, equivalent to over 200 million tons of standard coal. Utilizing this vented CBM would significantly help address energy shortages and generate substantial commercial benefits.

This study focuses on ruthenium recovery from spent catalysts in petrochemical industry and proposes optimized process, equipment, and safety and environmental protection solutions through technical retrofit. After the retrofit, statistical analysis was conducted to validate performance indicators, while modern consulting methods were employed to evaluate economic and social benefits. The research ultimately recommends intelligent safety control and optimized application of chlorine-based processes in precious metal catalyst recovery. The results demonstrate significant optimization potential in the liquid chlorine chlorination method for precious metal catalyst recovery. This technical retrofit has notably enhanced ruthenium metal recovery rates, improved chlorine utilization efficiency, significantly upgraded remote control capabilities and reduced safety and environmental risks. The findings provide technical guidance for the recovery of ruthenium from ruthenium-containing waste in the petrochemical industry, facilitating circular and sustainable development.

PetroChina Dushanzi Petrochemical Company is progressing from a four-year overhaul cycle to a five-year overhaul cycle. The butadiene extraction unit is a polymerization-prone section (with the propyne distillation tower 20-C-401 being a critical risk point in the system due to moisture presence in the medium). As the late operational phase approaches, the accumulation of butadiene polymers within the tower system progressively clogs the trays, resulting in production fluctuations and even forcing the unit to shut down. Dushanzi Petrochemical Company successfully addressed the bottleneck of propyne distillation tower clogging during the pre-overhaul phase by implementing water flushing, as confirmed through consultations with industry and design experts. This approach has balanced material flows between upstream and downstream units and achieved the expected outcome.

Sulfur-containing natural gas production sites often experience internal leakage of valves. Such leakage can lead to the cold venting of sulfur-containing natural gas into the atmosphere through the venting system or cause safety accidents during maintenance and repair operations, posing significant risks to the safe production of enterprises. By analyzing the relationship between the sound waves and ultrasonic signals generated by valve leakage, on-site application of ultrasonic valve leakage detection technology has been carried out. The application results show that the ultrasonic valve leakage detection technology can effectively identify valve leakage and has certain promotion and application value for the timely detection of valve leakage in production sites.

In recent years, frequent occurrences of major and extraordinarily serious production accidents in enterprises have severely endangered the safety of employees' lives and undermined corporate image and development. Therefore, how to better and more thoroughly implement safety management to prevent production accidents has become a significant topic in corporate safety production work. Taking into account the management requirements set forth by national leadership and relevant authorities, this paper summarizes and analyses existing issues within the current safety management framework of oilfield production processes. To address the identified deficiencies in the dual-prevention mechanism management, this initiative establishes a grid-based management framework. By developing a digitalized safety supervision platform integrating grid management with dual-prevention mechanisms, it achieves comprehensive, diversified, and digitalized safety management. This approach effectively enhances corporate safety management standards, improves the efficiency of enterprise work safety risk and hazard control and prevents the occurrence of safety accidents.

The natural gas gathering and transportation system involves gas wells, pipelines, and gathering and transportation stations, characterized by wide spatial distribution and complex landforms. In recent years, the increasing number of natural gas wells, coupled with gathering and transportation pipelines with extended service life, third-party damage and natural disasters, has led to frequent and widespread natural gas leakage incidents. Traditional manual inspection is constrained by such factors as long distance, wide coverage and poor accessibility of gathering and transportation pipelines, preventing timely detection and response to anomalies. Through practical applications of unmanned aerial vehicle-mounted laser methane detectors in the inspection, oil and gas leakage monitoring, and emergency response command within natural gas gathering and transportation systems and supported by a case study from a company, this paper elaborates on how this technology enables timely detection and effective resolution of gas leakage in natural gas wells, pipelines, and gathering and transportation stations, thereby providing strong support for the safe and stable operation of natural gas gathering and transportation systems.

The chemical industry occupies a significant position within the national economy. However, due to the involvement of numerous hazardous chemicals and intricate processes in its production, chemical process safety management is crucial. This paper analyzes the current state of chemical safety management both domestically and internationally and explores the issues present in current chemical process safety management. It also proposes effective measures to enhance chemical process safety management. These measures include fostering a process safety culture, advancing equipment renewal and maintenance, and introducing and cultivating advanced talent, thereby ensuring the safe and stable operation of chemical production.

In view of the current operation status of petrochemical enterprises, this paper conducts an in-depth analysis of the safety production management problems in the operation process of petrochemical enterprises. Based on this, more effective and targeted preventive measures are formulated to comprehensively enhance the production management capabilities of petrochemical enterprises. This aims to promote the sustainable development of the petrochemical industry and ensure its stable operation. Some problems existing in petrochemical production are specifically analyzed and corresponding countermeasures are proposed.

Safety supervision is essential for the reliable operation of power grids. And in the context of the widespread, multifactorial Changqing Oilfield power grid, it presents significant challenges. This paper introduces the current situation of safety supervision and management of oilfield power grids from the aspects of substation operation, construction transformation, transmission and distribution lines and distributed power supply. It puts forward corresponding countermeasures for strengthening safety supervision mechanism, enhancing safety supervision capacity, strengthening line operation and maintenance and applying new technology, thereby providing reference for the construction of safe and reliable oilfield power grids.

In the current context of rapid development in the petrochemical industry, the proper disposal of hazardous waste has already become a core element for enterprises to achieve sustainable development. Taking a certain chemical enterprise as the research object, this paper deeply expounds its fine-grained management strategies for hazardous wastes such as waste developer solution and spent fixing bath generated from ray detection operations, as well as laboratory waste acid? and ?laboratory waste alkali. From the cutting-edge anti-seepage technology to the rigorous warehouse inbound and outbound processes? and stringent daily operation and maintenance supervision, the paper comprehensively presents the management details, offering a highly valuable model for hazardous waste management across the industry and facilitating the green development of enterprises.

This paper addresses the issues of laboratory safety management in oil and gas drilling enterprises under the background of artificial intelligence. By analyzing the current status and challenges of laboratory safety management, this study investigates the applications of artificial intelligence technologies in safety monitoring, risk assessment, emergency response and other fields. It proposes strategies for constructing an intelligent safety management system including improving infrastructure, optimizing management processes and cultivating professional talents. The results indicate that the application of artificial intelligence technologies can significantly enhance laboratory safety management, which provides a solid foundation for the sustainable development of oil and gas drilling enterprises and offers guiding significance.

Petrochemical enterprises involve multiple categories of hazardous chemicals that are flammable, explosive, and toxic. To effectively prevent the occurrence of major and extra-large accidents in petrochemical production, it is essential to conduct scientific and comprehensive safety assessment and risk evaluation of chemical installations and critical safety facilities. This study systematically integrates the interrelationships and application logic among three evaluation methodologies—HAZOP, LOPA and risk matrix—to develop a specific risk evaluation model. The model was validated through application in the safety assessment of cooling water systems for key facilities in chemical production processes, demonstrating its scientific validity and feasibility. The findings provide valuable references for process safety management and risk classification control system development in petrochemical enterprises.

VOCS fugitive emissions have received increasing attention from petrochemical enterprises as increasingly stringent environmental regulations are implemented. LDAR technology is a common means to reduce leakage. ?During the initial commissioning phase of petrochemical plants, enterprises must establish a seal point register and based on this register, establish an LDAR register to enable leakage monitoring. Manual statistics for seal point registers are highly labor-intensive; developing an automated seal point register aggregation tool via computer systems can significantly reduce man-hours and improve operational efficiency for maintenance enterprises. Manual statistics for seal point registers are highly labor-intensive; developing an automated seal point register aggregation tool via computer systems can significantly reduce man-hours and improve operations and maintenance? of enterprises.

In the engineering design of polyethylene production units, polyethylene dust presents a significant explosion hazard. Dust explosions not only cause substantial economic losses to manufacturing enterprises, but may also result in personnel casualties, posing severe threats to enterprise production safety. This paper examines the influencing factors of dust explosions based on the mechanism and characteristics of polyethylene dust explosions. It conducts a detailed analysis of dust explosion hazards in polyethylene production units by integrating process flow and material properties. From an engineering design perspective, the paper expounds a series of ?explosion prevention measures? and ?critical design principles?, thereby providing feasible recommendations to enhance the ?safe production? and operation of polyethylene production units.

The erosive wear in pipelines carrying multiphase flows containing solid particles is a key concern within the petrochemical sector. Coal powder particles present in the process streams of petrochemical plants such as coal liquefaction and coal-to-olefins plants cause erosive wear damage to pipelines, compromising their service life and creating safety hazards. Based on computational fluid dynamics (CFD) methods, the erosive wear of gas-liquid-solid three-phase flow pipe elbows of a coal chemical plant is studied. Furthermore, this study investigates the influence of pipe diameter, upstream straight pipe section and elbow angle on the maximum erosion wear rate. And suggestions for optimal pipeline layout are given. The results indicate that erosive wear primarily occurs on the inner wall of the outer side of the elbow, priority should be given to inspecting erosive wear in such areas. Pipe diameter has the greatest influence on erosive wear, followed by elbow angle. Therefore, increasing pipe diameter should be prioritized first, followed by reducing elbow angle to optimize pipeline layout.

Under jet fire scenarios, emergency depressurization is typically employed for overpressure protection of pressure vessels. When using fire and gas system (FGS) as the initiator, it is essential to ensure the overall protection performance to effectively mitigate overpressure risk. This paper discusses the key factors influencing the overall effectiveness of fire and gas system overpressure protection under jet fire scenarios, employs software simulation to assess system coverage and calculate system availability and evaluates flame detector layout optimization strategies. This provides guidance for the design of overpressure protection solutions for pressure vessels under jet fire scenarios.

?Iron-carbon micro-electrolysis process is proposed for efficient treatment of drilling wastewater in the oil and gas extraction industry. ?Single-factor experiments were conducted to systematically investigate the effects of initial pH, iron-carbon ratio, aeration rate, and reaction time on COD removal rate and color removal rate. On this basis, a quadratic polynomial regression model was established with COD removal rate and color removal rate as response variables, followed by analysis of variance (ANOVA) and residual normality testing, and finally multi-objective optimization was performed using the satisfaction function method. The results show that the optimal operating parameters for treating drilling wastewater by the micro-electrolysis process are an initial pH of 3.5, an iron-carbon ratio of 2.4, an aeration volume of 0.91L/min and a reaction time of 46 min. At this time, the COD and color removal rates predicted by the model can reach 90.6% and 94.1% respectively. The research results can provide a theoretical basis for the harmless treatment of drilling wastewater.

This study investigates scale formation in high-density clarifiers for industrial wastewater hardness removal. It analyzes the application context of high-density clarifiers in wastewater treatment and the prevalence and severity of scale formation. The mechanisms of scaling are expounded, and the primary manifestations of scale in high-density clarifiers along with their impacts on system operation are systematically reviewed and summarized. Based on this, a comprehensive set of integrated solutions—including equipment maintenance, design optimization, operational management and auxiliary strategies—has been proposed. These solutions can effectively mitigate scale formation in high-density clarifiers, thereby enhancing system operational efficiency and reliability.

The coke quench water system of the coking unit comprises three coke quench water tanks and one sulfur-containing wastewater tank. It continuously emits VOCS and odorous gases into the surrounding environment, particularly during the coke quenching stage of the coke drum. This results in severe ambient odors, environmental pollution and adverse impacts on the health of workers. ?This paper mainly analyzes the delayed coking process and the causes of VOCS emissions and the current status of VOCS treatment. Without altering the original coke quench process, technical modification was implemented by recovering tank top gas into low-pressure fuel gas, achieving enclosed treatment of VOCS, thereby eliminating fugitive VOCS discharge at its source.