Infrared imaging detection technology is a kind of auxiliary detection means for leak detection and repair (LDAR) work. The routine application includes auxiliary detection of inaccessible points, ensuring on-site detection safety and observing oil and gas leakage. A company actively expands the application range of infrared imaging technology including observation of equipment insulation effect, equipment drift, equipment operating status and container level changes, assistance in emergency handling and participation in government environmental protection supervision. The above measures have fully and reasonably utilized infrared imaging detection technology and ensured safe and stable production of the enterprise, which can serve as reference for peer companies.

Waste gas treatment during shutdown maintenance has always been a key and difficult task for chemical enterprises. Without corresponding treatment technologies, waste gas from steam purging in most chemical enterprises is directly discharged from high elevation. The waste gas not only degrades ambient air quality, but also causes atmospheric pollution and affects the occupational health of enterprise employees. By studying waste gas treatment technologies, waste gas from steam purging during shutdown maintenance is collected in a centralized manner, and an efficient treatment process of absorption, separation, condensation, oil and gas capture, and two-stage adsorption is adopted. Following testing, the concentration of volatile organic compounds in the treated waste gas is significantly reduced, which promotes the emission of waste gas to meet the standard, thereby accomplishing enclosed purging of the device, reducing the emission of VOCS and odors in the waste gas and achieving the effect of waste gas treatment. This help to create a good working environment and enhance environmental pollution control capabilities.

Xinjiang Oilfield has vigorously advanced its ?Going Global strategy?. With steadily expanding overseas and domestic markets, An integrated framework for overseas oilfield operations has been developed and expanded in the company. The HSE (Health, Safety and Environment) and HSSE (Health, Safety, Security and Environment) management of external operations is different from those of internal operations in terms of risks, management mechanisms and processes, Xinjiang Oilfield has strengthened its HSSE management work for external operations by exploring an integrated management model. It has proposed the framework of the HSSE management system for external operations, complied management system documents and clarified the methods and procedures for HSSE risk management. It has also implemented targeted risk control measures. The application of these measures to the HSSE management of external operations has yielded favorable performance outcomes, thereby ensuring the safe and efficient development of external operations.

To adapt to the application trend of wall thickness reduction in N06625 for molten salt absorbers, the trial production of ultra-thin N06625 alloy tubes for molten salt absorbers was carried out through composition design and manufacturing process research. The chemical composition, mechanical properties, technological properties, corrosion resistance and dimensional accuracy of the trial-produced N06625 alloy tubes were inspected and tested. The results indicate that all the indicators of the trial-produced N06625 alloy tubes meet the design requirements, exhibit excellent overall performance and demonstrate substantial potential for industrial application. ?Its ultra-thin characteristic significantly reduces material costs, offering substantial economic advantages. This technological breakthrough will effectively promote the large-scale adoption of tower solar thermal power stations, while providing green thermal and electrical energy solutions for petrochemical, iron and steel, and other energy-intensive industries.

Through literature review, case studies and field investigations, this paper systematically elaborates on the key components and fundamental principles for constructing an oil depot safety management system. Combined with typical case examples, it analyzes the practical effectiveness of system implementation. The study further reveals the implementation challenges currently faced by oil depots in areas such as safety regulations, personnel competence and equipment facilities including inadequate enforcement of regulations, weak safety awareness among staff, and ageing and outdated equipment. Accordingly, this paper proposes countermeasures such as improving system design, enhancing personnel training and optimizing equipment management. Future oil depot safety management will evolve toward digitalization, integration and sustainability.

To address the high-risk, strongly coupled, and rapidly evolving characteristics of the "Three Wastes" (industrial wastewater, waste gases and residues) emissions and environmental emergencies in petrochemical enterprises, this paper proposes an integrated “Monitoring–Early Warning–Response” system for environmental safety. Centered on multi-source data and meteorological–process scenarios, the framework is composed of four layers: perception, transmission, platform and application. It incorporates event classification, coordinated disposal and resource grouping mechanisms. The precision of early warning and the timeliness of response are enhanced through the risk-oriented indicator system and closed-loop auditing. At the engineering level, systematic design recommendations are proposed for monitoring site layout, alarm and signal distribution and platform configuration, ensuring data reliability and system resilience. This study provides replicable technical pathways and management strategies for the digitalization and standardization of environmental risk control in petrochemical enterprises.

This paper constructs a risk assessment system for unsafe behavior of enterprise personnel by delving into the theory of human factor analysis and classification systems. It introduces the Five-element Connection Number based on set pair theory into the risk assessment model for unsafe personnel behaviors, enabling quantitative evaluation. Furthermore, the paper deeply explores the key factors influencing personnel behaviors in system security. Meanwhile, it analyzes the dynamic development trend of enterprise personnel's unsafe behavior risk using partial connection numbers at each order. Empirical validation demonstrates that this assessment method not only enables quantitative analysis of risk-influencing factors, but also provides reasonably reliable predictions of personnel-induced system risk trends. This offers a scientific basis for decision-making in better understanding and addressing system risks.

To address issues such as different process risk analysis methods and reporting quality across operational areas and stations, multi-departmental involvement and poor communication in risk closure, difficulty in tracking closed-loop management, lack of digital tools and incomplete information transmission via paper-based documentation in long-distance pipeline design management consulting work, an integrated platform for dynamic management and control of process risks throughout the life cycle has been designed and developed. The platform includes three modules covering risk source identification and assessment, dynamic risk supervision and periodic detection and early warning. Through specific project cases, the responsible parties at the multiple stages of design, construction and operation and maintenance are integrated to achieve precise risk management and control, streamlined responsibility tracking, complete closed-loop management and intelligent maintenance and early warning. This has improved the level of project safety management and provided reference for life cycle safety management and digital transformation of oil and gas storage and transportation.

As the "safety gatekeeper" of modern high-risk industries, direct operation licenses play an irreplaceable role in eliminating or reducing accidents. Petroleum engineering enterprises face more high-risk operations in actual work. By continuously improving the application of operation license management in enterprises, the probability of accidents in direct operation can be effectively reduced, and it has been explored. This article provides exploratory ideas for the realization of the goals of petroleum engineering enterprises in terms of personnel qualification management, risk assessment before construction, process management, illegal behavior barrier management, risk management, etc. in the direct operation process.

During the production and operation process of hazardous chemical enterprises, there are numerous risk factors. These enterprises utilize a wide variety of systems and platforms for risk management, which poses big challenges to management personnel in daily safety management work. Through a research on the application of information technology in Linyi Kang'ai Te Chemical Technology Co., Ltd., this paper integrates various safety risk management systems into a single platform, enabling the management of multiple system modules on one platform. It realizes integrated and intelligent control over on-site safety production and basic data, achieves dynamic perception and supervision. This has effectively enhanced the management efficiency and strengthened emergency response capabilities.

ALOHA software and the Gaussian Plume Model were utilized as the basis to analyze the impact of various factors on the spread distance of hazard zones through the setting of leakage accident scenarios. And the diffusion influence under worst-case conditions was analyzed. The results show that larger leakage apertures and higher atmospheric stability levels result in farther diffusion distance of different hazard zones; and higher height of leakage point, greater wind speeds and greater surface roughness reduce the spread distances of these zones; wind speed and atmospheric stability demonstrate stronger sensitivity in influencing diffusion distances; under worst-case conditions, residential buildings 150m downwind of the station fail to meet minimum safety distances, exposing outdoor personnel in this vicinity to a certain injury risk. The research results can provide a theoretical basis for the rapid and reasonable division of the alert areas，to ensure the safe and stable operation of gas transmission stations.

Petrochemical projects present numerous safety risks due to diverse building configurations, complex geological conditions and significant construction challenges. Taking the second phase of Zhoushan Petrochemical Project as the research object, this paper explores the application of grid-based management: dividing management objectives into grid units, establishing dedicated grid service teams, building a supporting safety management information system with information technology and constructing a new model of refined management with comprehensive vertical and horizontal coverage. After analyzing its operational mechanism and advantages, it is concluded that this model can provide a systematic management method for projects, effectively improving the response speed and handling efficiency of risks in petrochemical industry and meeting the industry safety management requirements.

To address the leakage issue of mechanical seal breather valves on nitrogen-sealed tanks in benzene-related tank farms, a petrochemical enterprise in central China applied a new type of liquid-sealed breather valve produced by a domestic manufacturer. This paper evaluates the application effect by comparing and analyzing the sealing forms, structural characteristics, and operating data of the new and old breather valves. The evaluation shows that compared with mechanical seal breather valves, the new liquid-sealed type has remarkable environmental and energy-saving effects in reducing tank VOCS (Volatile Organic Compounds) and nitrogen consumption of the nitrogen-sealing system, and realizes real-time monitoring of the breather valve's operating status. It effectively prevents the flash explosion risk caused by the accumulation of combustible gas on the tank top, providing an effective method for refining and chemical enterprises in the treatment of VOCS in tank farms.

The saline wastewater treated by a petrochemical enterprise mainly consists of refinery saline effluent and saline effluent generated by low-salinity water regeneration units. The saline wastewater treatment system is functionally divided into refinery saline effluent treatment unit, effluent upgrading unit #1 and effluent upgrading unit #2. With the adjustment of the industrial structure of upstream production facilities and the continuous development of clean production work, variations have emerged in both flow rates and quality of discharged water, with operational parameters at certain facilities deviating substantially from design specifications. As the running time increases, some device defects are also exposed. In order to reduce consumption and ensure stable operation, optimizations were implemented for the two-stage DGF (dissolved gas flotation) system, two-stage forced aeration basin and wastewater polishing unit process,good results have been achieved.

Aiming at the problem of effluent violating discharge standards due to the high fluorine content in coal gasification wastewater, this paper conducts a comparative analysis of the defluoridation technologies including activated alumina adsorption, cationic chelate resin adsorption, and defluoridation reagent coagulation and precipitation on the basis of clearly defined control indicators and comprehensive water quality analysis. According to the application results, the paper carries out the condition optimization experiments regarding different reagent dosages for fluoride removal and proposes appropriate technology. This provides technical support for reducing fluoride content in coal gasification wastewater pretreatment to achieve discharge in compliance with national standards?.

To address unstable ammonia nitrogen treatment efficiency in the actual operation of chemical wastewater treatment plants, causal chain analysis method was applied for in-depth problem diagnosis. On-site investigation, sampling and laboratory testing identified two root causes: one is the inadequate sludge return flow with dead zones in the secondary sedimentation tank, and the other is the insufficient influent alkalinity impairing nitrification function. Meanwhile, to resolve these issues, experiments were conducted to screen alkalinity-adjusting chemicals and optimize their dosage. Recommendations were also proposed for optimizing the operation of the A/O process.

Homogeneous metal catalysts demonstrate good catalytic performance and are extensively applied in petrochemical, pharmaceutical and fine chemical industries. During recycling of homogeneous metal catalysts, metal leaching generates catalyst-laden waste liquid. Upon activity degradation, the decommissioned catalysts form additional spent catalyst waste streams. Due to the different properties of homogeneous metal catalyst waste liquid, suitable recovery methods can be selected. These mainly include physical and chemical recovery methods such as extraction, adsorption and distillation, as well as chemical recovery methods such as precipitation, digestion, oxidation-reduction, incineration and supercritical water oxidation. The recycling and reuse of homogeneous metal catalyst waste liquid is beneficial for cost reduction, resource conservation and environmental protection.