【Ten Years of Rapid Development in Chemical Processing Equipment】The world’s first flue gas desulfurization and denitrification system for coke ovens was put into operation between 1730 and 2015

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Happy May Day 2024! Safety first. Let’s give praise and support to the achievements in China’s chemical engineering technology and equipment. **********************【Ten Years of Development in Chemical Engineering Equipment】Regular updates and summaries are available; feel free to join the discussions at https://bbs.hcbbs.com/thread-3576046-1-1.html (Source: Haichuan Chemical Engineering Forum) ***************** On November 6, 2015, the flue gas purification system for Baosteel Zhanjiang Steel’s coking plant, designed and supplied by MCC Coking & Refractory, was put into operation. This marked the birth of the world’s first industrial-scale demonstration unit for low-temperature desulfurization and denitrification of coker flue gas. Low-temperature desulfurization and denitration of coke oven flue gas is a technologically challenging issue recognized worldwide. Through extensive field research, theoretical analysis, and process comparisons, MCC Coking & Refractory has developed the \"dry/semi-dry desulfurization + low-temperature denitrification and dust removal with thermal desorption integrated technology and process.\" This approach addresses the technical challenges associated with desulfurization and denitrification of flue gases from coke ovens: desulfurization is carried out first, followed by dust removal, and then denitrification using low-temperature SCR, thereby ensuring that pollutants are discharged within specified limits. In June 2015, MCC Coking & Refractory officially signed the EP contract for the flue gas purification facilities at Baosteel’s Zhanjiang coke oven plant. As the core equipment of this project, the De-NOx Dedusting Pyrolysis unit combines functions such as low-temperature De-NOx treatment, desulfurization and dust removal, as well as in-situ catalyst regeneration. It incorporates a number of new energy-saving and environmental protection technologies, including a combined semi-dry method for desulfurization and De-NOx/dust removal, techniques for uniform airflow distribution within the De-NOx reactor, ammonia/flue gas mixing technologies, in-situ regeneration of De-NOx catalysts in a single chamber, negative pressure control for coke oven flue gases, and technologies for reusing waste heat from clean flue gases. The entire process generates no wastewater; the desulfurization by-products can be recycled by relevant chemical manufacturers or discharged directly, meeting current environmental protection requirements and the technological trends in flue gas treatment. Currently, all systems of the device are operating normally. Once the facility reaches full capacity, the emissions of sulfur dioxide and nitrogen oxides will be less than 30 milligrams per cubic meter and 150 milligrams per cubic meter respectively, with all these values meeting the environmental emission limits specified for special restricted areas in the **Emission Standards for Pollutants in the Coking Chemical Industry**.