Comprehensive processing recycling process and device of bromine-contained high temperature flue gas

Abstract

The invention discloses a comprehensive processing recycling process and device of bromine-contained high temperature flue gas. The comprehensive processing recycling process mainly includes the steps of enabling the high temperature flue gas coming from a high temperature combustor and a second combustor to enter a waste heat boiler for cooling, enabling steam generated by the waste heat boiler to be outwards supplied to users needing the stream for use, enabling the high temperature flue gas to enter a dust removal device so as to remove flying ash in the flue gas, enabling the high temperature flue gas to pass through a flue gas rapid cooling device so that the temperature of the flue gas can be reduced, enabling the flue gas to enter a flue gas cooling device, enabling the sufficiently-cooled flue gas to enter a bromine adsorption device, after the bromine adsorption device is saturated, adopting a small amount of hot air to regenerate adsorption media, enabling high-concentration bromine-contained gas generated by the regeneration to enter a bromine condensing device, enabling the cooled flue gas to be discharged by a chimney, and enabling condensed liquid bromine to be collected by a bromine recycling container which is connected with the bromine condensing device placed in an inclined mode. According to the comprehensive processing recycling process and device of the bromine-contained high temperature flue gas, inorganic bromine in the flue gas is recycled, meanwhile, new waste liquid or new waste residues are avoided, heat energy in the flue gas is recycled to the maximum degree, and the flue gas cooling process is controlled to regenerate dioxin without addition of new chemical reagents.

Description

technical field [0001] The invention belongs to the technical field of energy and environmental protection engineering, and in particular relates to a comprehensive treatment and recycling process and device for bromine-containing high-temperature flue gas. Background technique [0002] In electronic waste (e-waste), especially in waste printed circuit boards, in addition to the high recycling value of non-ferrous metals such as copper and aluminum, the extremely small amount of precious metals in it is even more valuable. According to the report of the United Nations Environment Program (Recycling-from E-waste to Resouces, UNEP, 2007), the pyrometallurgical process is currently the process with the highest recovery rate of precious metals (while effectively recovering metallic copper), other methods (including hydrometallurgical processes etc.) are likely to cause the loss of precious metals or the recovery rate is not high, so the pyrometallurgical process characterized by...

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Problems solved by technology

Chinese patent CN101357290A provides a method and system for recycling sulfur-containing inhibitors to control the emission of dioxins in the flue gas generated by waste incineration. Although the new sulfides in the flue gas are greatly reduced, kinetic energy and auxiliary nitrogen are increased. Consumption

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