Minglang’s new desulfurization technology is used in coal coking projects

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New Desulfurization Technology from Minglang Applied in Coal Coking Projects Author/Source: Sinochem New Network Date: 2019-08-21 Clicks: 47 To date, the desulfurization units as well as the systems for converting waste liquid into acid in the first phase of Shanxi Jinyan Energy Technology Co., Ltd.’s 5 million tons per year coking project, which utilize various desulfurization patents and proprietary technologies developed by Jiangsu Minglang Environmental Technology Co., Ltd., have been operating continuously and stably for over 3 months, with all process parameters reaching industry-leading levels. 　　The 5 million tons per year large-scale coking project serves as a model enterprise for Xiaoyi City’s 10 million tons level new coal chemical industry base. The project is constructed in two phases, with Huatai Yongchuang (Beijing) Technology Co., Ltd. handling the overall design. By the end of 2018, the first phase of the project was completed and put into operation. The production results met the intended design objectives, with various technical indicators reaching industry-leading levels. 　　According to Gao Zhidou, chairman of Minglang Company, the integrated desulfurization and acid production project for the first phase of the coking plant with an annual capacity of 5 million tons is under the general contracting of Minglang Company. This project utilizes Minglang Company’s proprietary technology, breaking away from the traditional processes and equipment used for desulfurizing coke oven gas, covering everything from pre-cooling to desulfurization and regeneration, as well as sulfur recovery and acid production. 　　Gao Zhidou explained that the desulfurization process used in this project is simple to operate and highly efficient. With an inlet hydrogen sulfide concentration of 6,000 mg/Nm3, just one desulfurization tower is sufficient to keep the outlet hydrogen sulfide concentration below 15 mg/Nm3. The free ammonia content in the solution can reach up to 15 g/L, while the concentration of regenerated suspended sulfur is kept stable at below 0.5 g/L. The system hardly requires any additional ammonia water, and the sulfur powder obtained through sulfur recovery has a moisture content of less than 12%, thereby providing favorable conditions for acid production and resolving the issue of imbalance between sulfur, waste liquid, and acid. 　　The desulfurization tower uses high-temperature and high-strength polypropylene stepped rings, which provide a large mass transfer area and low resistance; currently, the resistance of the desulfurization system is less than 500 Pa. “The regeneration process employs low-tower jet oxygen-deficient regeneration and comprehensive utilization of recycled regeneration gas, which not only reduces ammonia loss in the system and the amount of waste gas that needs to be treated, but also minimizes the occurrence of side reactions. This project features high comprehensive desulfurization efficiency, and its operational parameters are at the leading level in the current coking desulfurization industry. ”Gao Zhidou said. 　　Minglang Company is a **high-tech enterprise** specialized in the development and application of technologies for desulfurization, denitration, and waste heat recovery. It has independently developed technologies such as wet desulfurization using micro-reactors, waste heat recovery at low, medium, and high pressures in coke oven rise pipes, desulfurization of gases released during dry quenching of coke, and Fischer-Tropsch oil synthesis technology.