Ten regulations to prevent hydrogen sulfide poisoning: recent accident cases in the vicinity
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This post was last edited by Desert Fish on 2020-8-28 at 12:03. 1. Personnel involved in production operations, maintenance, and related tasks must receive training on first aid measures for hydrogen sulfide poisoning before starting work; they may only begin working after passing the relevant examinations. 2. Determine the distribution of hydrogen sulfide, create a plan view map, and install warning signs at the locations where hazardous operations are carried out. 3. Provide appropriate protective equipment based on the specific characteristics of the production positions and working environments, incorporate these requirements into the job responsibility systems, and strengthen management accordingly. 4. The hydrogen sulfide concentration in the equipment area or production environment meets **health standards. 5. The hydrogen sulfide levels in the media used during production and in the working environment must be evaluated regularly. In cases where changes in materials or modifications to the equipment lead to hydrogen sulfide concentrations exceeding normal levels, appropriate protective measures must be taken promptly. 6. Automatic detection alarms should be installed in devices or areas where there is a risk of hydrogen sulfide leakage causing poisoning. 7. During oil inlet, outlet, and blending operations for Class A and Class B oil tanks, top-of-tank operations such as sampling, taking measurements, temperature testing (except for fixed wall temperature measurement), and replacing or inspecting safety accessories are prohibited. The liquid level in the tank must be allowed to settle for 30 minutes before the aforementioned operations can be carried out. 8. When performing tasks such as sampling, measuring volume, dehydrating and plugging leaks, or maintenance on crude gasoline tanks, light polluted oil tanks, and equipment containing acidic gases or gas media, appropriate gas masks must be used. Two people should be present at the site, standing upwind; one person carries out the work while the other acts as a supervisor. 9. When working in areas contaminated by hydrogen sulfide, special protective equipment must be worn; it is strictly prohibited to remove this equipment before leaving the dangerous area to prevent poisoning. 10. Persons who are engaged in work involving hydrogen sulfide on a regular basis should undergo periodic health checks as required.
Relevant companies can use these ten points as a reference to develop more detailed operational guidelines
China News Network, Published on: 06-18 13:59. Official account of China News Network. Xinhua News Agency, Hangzhou, June 18 (Ying Xinrui) – The Zhejiang Provincial Emergency Management Department announced on the 18th that at around 2:23 p.m. on June 13, workers at the Meixinda Dyeing and Printing Company in Wuxing District, Huzhou City, Zhejiang Province, suffered hydrogen sulfide poisoning while cleaning a reaction tank; as a result, 4 people died and 5 were injured. It is understood that acute hydrogen sulfide poisoning is a systemic disease characterized by damage to multiple organs, primarily the central nervous system and respiratory system, resulting from the inhalation of large amounts of hydrogen sulfide gas in a short period of time. Hydrogen sulfide is a harmful gas that is irritating and asphyxiating; acute poisoning can affect various organs and tissues, including the central nervous system, respiratory system, and cardiovascular system. On June 15, at a meeting held by the Zhejiang Provincial Party Committee, Secretary Che Jun called on all localities and departments to firmly establish a strong awareness of the critical importance of work safety. He urged thorough investigations and rectifications of potential safety hazards, especially those in the chemical industry. It was necessary to strictly enforce the responsibilities of enterprises, party committees and local authorities, industry regulators, and safety supervision agencies, so as to eliminate serious hazards, prevent major accidents from occurring, and build a solid defense mechanism for ensuring safety. (End)
New technology installs safety \"latches\" on pipelines for gas fields with high sulfur content. Xinhua Net client, 3 hours ago · Official Xinhua Net account. Source: Science and Technology Daily, photo gallery, latest discoveries and innovations. Recently, reporters learned from the Puguang Branch of the Zhongyuan Oilfield that the key technologies for the safe and efficient operation of gathering and transportation systems in complex mountainous areas with high hydrogen sulfide levels, developed independently in China, have passed evaluation; these technologies are at the leading level in China, and some of them fill gaps in international research. “Currently, this technological achievement has been applied to the gathering and transportation system of the Puguang gas field, achieving a 100% detection rate for pipeline corrosion and strain risks, as well as an accuracy rate of over 98% in leak detection, thus providing a safety \"latch\" for the gathering and transportation pipelines in the Puguang gas field. ”Li Daibai, director of the Technical Management Office at the Gas Production Plant of Puguang Branch in Zhongyuan Oilfield, said. The Puguang gas field is located in Puguang Town, Xuanhan County, Dazhou City, Sichuan Province. It is China’s first super-large gas field with high sulfur content to be successfully developed. With the rapid development of gas fields, the decline in production pressure in gas reservoirs and the emergence of formation water lead to fluid accumulation in transportation pipelines as well as sulfur deposition. This results in an increase in the chloride ion content in the produced water, making corrosion control more difficult. There is a greater need for leakage detection and control technologies, and the need for techniques to address fluid accumulation and sulfur deposition is becoming increasingly prominent. After several years of research and development, this research team has developed key technologies for the safe and efficient operation of transmission systems in complex mountainous areas with high hydrogen sulfide levels, focusing on four areas such as corrosion detection and risk assessment of existing high-pressure, high-sulfur content pipelines. A control system that features accurate early warning for corrosion and strain, precise leak detection, effective control of fluid accumulation and treatment of sulfur deposition, as well as high overall energy efficiency, has been established, providing technical support for the continuous, safe, and environmentally sustainable operation of these transmission systems. They established a \"1+2\" leakage control system based on four-level shutdown mechanisms, emergency spraying systems, as well as rapid collection and treatment of hydrogen sulfide; the accuracy of leakage detection exceeds 98%, and the compliance rate of the shutdown protocols is 100%. This ensures that leaks are dealt with promptly and effectively, thereby reducing the risks associated with leaks in the gas field. At the same time, to address the challenges related to corrosion detection, evaluation, and early warning for pipelines in service for long periods under new corrosive conditions, this team integrated comprehensive corrosion detection techniques with strain-based early warning systems. They developed a novel technical framework for evaluating corrosion risks in natural gas pipelines with high sulfur content, as well as an intelligent early warning platform, thereby enabling comprehensive and real-time detection of defects in such pipelines and providing technical support for replacing pipes in high-risk areas. Science and Technology Daily (Reporter: Sheng Li)
Yu is extremely knowledgeable and has a wide range of expertise.
I have time to gather some relevant information from the Internet. -------------------------------------------------- A hydrogen sulfide leak occurred at a company, causing multiple people to be poisoned! 2018-01-03 16:10 On December 27, 2017, a hydrogen sulfide leak occurred at Chongqing Zhongbang Technology Co., Ltd., resulting in 8 people being poisoned – 6 of them with mild poisoning and 2 with moderate poisoning. This accident occurred at a critical time at the end of the year, had a significant impact, and served as a profound lesson. Chongqing Zhongbang Technology Co., Ltd. is located in the Wanzhou Economic and Technological Development Zone in Chongqing. It was established in May 2013 and has 173 employees. Its main products include copper zinc pyridithione (with an annual production capacity of 6,000 tons) and 2,3-dichloropyridine (with an annual production capacity of 3,000 tons). At 10:30 on December 27, REC experienced a hydrogen sulfide leak in the thiolation and decolorization tank area; as a result, 8 people working at the thiolation station, the nitrogen oxidation station, as well as those involved in on-site construction and emergency response were poisoned. After being taken to the hospital for treatment, 7 of them have regained consciousness, while 1 person remains in a coma. Based on preliminary investigation and analysis, the direct cause of this accident was the workers’ violation of operating procedures, which led to an abnormal reaction of the materials inside the thiolation reactor and the generation of hydrogen sulfide gas. Hydrogen sulfide gas leaked into Tank 2 for decolorization through the exhaust pipe and overflowed from its feeding port, causing poisoning of the personnel on site.