Waste heat utilizing system and method of waste acid cracking furnace using organic waste sulfuric acid as raw material

Abstract

The invention belongs to the technical field of chemical industry production and is suitable for waste heat utilization of a waste sulfuric acid cracking treatment device using organic waste sulfuric acid as a raw material. The waste sulfuric acid cracking treatment device comprises a waste heat cracking furnace, a furnace gas cooler, an air fan, heat exchange equipment and a SO2 treatment system. High-temperature flue gas enters the furnace gas cooler after coming out from the waste heat cracking furnace and enters the SO2 treatment system after being cooled by cold air, the cold air is divided into two streams after being heated in the furnace gas cooler, one stream enters the waste heat cracking furnace to support combustion of fuel, and the other stream heats a cold medium for a user to use. Waste heat utilization of the waste heat cracking furnace is realized, and safety and stability in running of the device are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and specifically relates to a waste heat utilization system and method of a waste acid cracking furnace containing waste organic sulfuric acid as a raw material. Background technique [0002] There are generally two kinds of flue gas cooling processes after pyrolysis in domestic and foreign waste sulfuric acid pyrolysis recovery units, one is to use waste heat boiler to cool down, and the other is to use natural heat dissipation furnace gas to cool down. For the cooling process of the waste heat boiler, the high-temperature flue gas after the cracking furnace enters the waste heat boiler to be cooled, and the steam (or heat transfer oil) produced is used for process or life. Due to the low temperature of the cold side, the surface temperature of the flue gas side wall in the low temperature section is lower than the dew point temperature, condensed acid appears, and the equipment is q...

AI Technical Summary

Problems solved by technology

Due to the low temperature of the cold side, the surface temperature of the flue gas side wall in the low temperature section is lower than the dew point temperature, condensed acid appears, and the equipment is quickly worn out, which affects the safety and stability of the entire device

For the natural heat dissipation furnace gas cooler process, the high-temperature flue gas after the cracking furnace is cooled by the natural heat dissipation furnace gas cooler. Although the reliability is high, all the heat is lost to the air and cannot be used. It's also not advisable today

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