Coke oven gas purifying device

• Main Author: JIA HUIPING
• Format: Patent
• Language: English
• Published: 15.04.2015
• Subjects: CHEMISTRY; FUELS; LUBRICANTS; METALLURGY; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLEGASES CONTAINING CARBON MONOXIDE; TECHNICAL GASES CONTAINING CARBON MONOXIDE

The utility model relates to a coke oven gas purifying device which comprises a primary cooler and a dehydrating tower. A feeding port of the primary cooler is connected with a coke oven gas pipeline, and a discharging port of the primary cooler is connected with the dehydrating tower. The coke oven gas purifying device is further provided with a liquid ammonia recovery tower and a methyl alcohol washing tower, and a tar recovery tower is selectively arranged. The dehydrating tower is connected with the tar recovery tower or the liquid ammonia recovery tower, the liquid ammonia recovery tower is connected with the methyl alcohol washing tower, and the methyl alcohol washing tower is connected with a pure coal gas tank. When the tar recovery tower is selected to be arranged, the tar recovery tower is connected with the liquid ammonia recovery tower. The tar recovery tower and the liquid ammonia recovery tower are connected with liquid carbon dioxide pipelines respectively, a tower bottom outlet of the tar recovery tower is connected with a tar recovery device, and a tower bottom outlet of the liquid ammonia recovery tower is connected with a liquid ammonia recovery device. According to the coke oven gas purifying device, impurities and harmful substances in coal gas are removed through the processes of cooling, dehydrating and tar and ammonia separation and the process of methyl alcohol washing, the sources of clean fuel are expanded, the quality of good fuel can be easily improved, and the atmospheric pollution is reduced.