Tianjin Derui Chemical Technology Co., Ltd. has applied for a patent titled “A Purification Device for Coke Oven Gas and Its Purification Process”
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According to news from August 23, 2025, **information from the Intellectual Property Office shows that Tianjin Derui Chemical Technology Co., Ltd. has filed a patent application titled “A purification device for coke oven gas and its purification process,” with the publication number CN120519203A; the application was submitted in July 2025.** The patent abstract indicates that this application provides a purification device for coke oven gas and its purification process. The purification device includes a water-washing ammonia tower; this water-washing ammonia tower is connected to an ammonia vaporization tower, which in turn is connected to an ammonia water purification tower. The top of the water-washing ammonia tower is connected to a normal-temperature methanol washing tower, which is linked to an extraction tower. The bottom of the extraction tower is connected to a methanol-water separation tower, and the top of this methanol-water separation tower is connected to itself via a circulation pipeline ； The top of the normal-temperature methanol wash tower is connected to the low-temperature methanol wash tower; a clean gas extraction pipeline is installed at the top of the low-temperature methanol wash tower. The bottom of this tower is connected to the flash tower, whose bottom in turn is connected to the upper middle part of the low-temperature methanol wash tower ； This purification device features a short process flow, low equipment costs, and requires minimal investment; the purified coke oven gas meets high standards and can be used directly ； No waste liquids, residues, or catalysts are generated; it is environmentally friendly and has low energy consumption.
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