Industry News-Xinrui,Professional sulfur recovery technology provider

Introduction to wet chelating iron desulfurization process

2019-08-06

Application of wet chelating iron desulfurization technology in coal chemical industry

2019-07-18

In the coal chemical industry, the low-temperature methanol washing process plays a pivotal role. Whether it's direct coal liquefaction, indirect liquefaction, or coal gasification to produce chemical products, most processes require gas purification, and low-temperature methanol washing is undoubtedly the most competitive and mature gas purification technology currently available. It has been widely used in domestic and international synthesis ammonia, methanol synthesis, other carbonyl synthesis, city gas, industrial hydrogen production, and natural gas desulfurization gas purification units. Especially for the purification of syngas produced from coal (coal-water slurry) or slag (heavy) oil, this method is even more effective. In China, most large-scale synthesis ammonia and methanol plants using coal and slag oil as raw materials also adopt this technology. Low-temperature methanol washing has a higher investment cost, but compared to other desulfurization and decarbonization processes, it has advantages such as low power consumption, low steam consumption, low solvent cost, and low operating costs. In particular, the high purity of desulfurization is very beneficial to methanol and ammonia production. In the low-temperature methanol washing process, hydrogen sulfide is not chemically converted but is enriched in the acid gas, which is then treated using the Claus process. However, the Claus desulfurization process is a catalytic oxidation process for acid gases with high sulfur content. It requires high investment, a long process, and a sulfur content of over 10%, making it unsuitable for acid gas desulfurization with low inlet sulfur content and high purity requirements. For acid gas desulfurization with high purity requirements, a multi-stage Claus process is needed, resulting in a long process and high investment. When the H2S content is >12%, the gas becomes more corrosive and toxic, and is flammable and explosive. In NHD or low-temperature methanol washing units, H2S needs repeated absorption, desorption, and concentration to barely reach over 12%, barely suitable for Claus sulfur recovery technology. Moreover, the Claus sulfur recovery desulfurization tail gas H2S or SO2 is difficult to meet national emission standards, with typical contents of 300-3000 ppm, often requiring further treatment. The Claus sulfur recovery technology is clearly not an ideal acid gas desulfurization technology. Since its establishment in May 2013, Yantai SUNRISE Environmental Protection Technology Co., Ltd. has been committed to the development and research of hydrogen sulfide removal processes and hydrogen sulfide desulfurization agents. To date, the company's developed BLUER-PRO wet chelating iron desulfurization process and XR-SR series desulfurization agents have been applied to more than 20 sulfur recovery units at home and abroad, with significant desulfurization effects. The H2S content in the purified mixed gas is ≤5 ppm. We have established long-term cooperation with many universities and research institutions, including Beijing University of Chemical Technology, Shaanxi Supergravity Research Center, and Qingdao University of Science and Technology, to continuously optimize existing hydrogen sulfide removal processes and desulfurization agents. The BLUER-PRO process has all the advantages of traditional liquid-phase oxidation catalysis, specifically: (1) High hydrogen sulfide removal rate, with a one-step removal rate of over 99.99%, and the treated tail gas H2S concentration can be controlled below 5 ppm. (2) Wide application range, capable of processing various H2S-containing gases with high selectivity. (3) Large operating flexibility, able to adapt to large fluctuations in H2S concentration and gas flow rate in the raw gas (0-100%). (4) Environmentally friendly, with no three wastes produced. (5) Mild reaction conditions, a liquid-phase reaction process at normal temperature and pressure. (6) Simple process, simple start-up, shutdown, and daily operation. (7) High economic performance, small footprint, low investment cost, and low daily operating cost. (8) High safety performance, the system does not use any toxic chemicals, and the sulfur product contains no H2S gas. (9) Reliable operation, unique design ensures no blockage, guaranteeing stable long-term operation. (10) Good sulfur quality, few impurities.

Latest progress on air pollution control in Shandong Province

2019-05-05

Latest Progress on Air Pollution Control in Shandong Province With the approval of the Shandong Provincial Government, the Shandong Provincial Ecology and Environment Department, together with the Provincial Public Security Department, the Provincial Natural Resources Department, the Provincial Housing and Urban-Rural Development Department, the Provincial Transportation Department, and the Shandong Provincial Water Resources Department, formed eight inspection teams to conduct a month-long special campaign focusing on air pollution control across the 16 cities of Shandong Province. The campaign focuses on industrial pollution control, motor vehicle pollution control, and dust pollution control. As of April 26, a total of 1206 enterprises (sites) have been inspected, and enterprises (sites) with environmental problems…

Legal Daily Commentary: Contributing Chinese Legal Wisdom to Global Ecological Civilization

2019-05-05

Legal Daily Commentary: Contributing Chinese Legal Wisdom to Global Ecological Civilization Recently, 10 Chinese environmental and resource judicial cases have been included in the China Environmental Judicial Decisions section of the United Nations Environment Programme's environmental law database, and have been featured with summaries and links in the Laws and Cases section of the United Nations Multilateral Environmental Agreements Information Portal. Also published were the English versions of the 2016 and 2017 China Environmental and Resource Judicial White Papers. This marks the first time that Chinese judicial cases have been systematically and continuously published on a dedicated section of the UN website, demonstrating the international community's recognition of China's ecological and environmental protection efforts.

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