Multi-section ammonia-process desulfurization and dust removal absorption tower for flue gas of carbon furnace and coke oven

Abstract

The invention discloses a multi-section ammonia-process desulfurization and dust removal absorption tower for flue gas of a carbon furnace and a coke oven. A flue gas desulfurization and dust removal process adopts a counter-flow jetting and filling type absorption tower design; a flue gas inlet is formed in the lower middle part of the absorption tower; a water spraying and cooling device is arranged at an inlet flue; a flue gas outlet is formed in the top of the absorption tower; the absorption tower is internally provided with a screen mesh de-foaming section, an aerosol washing section, a demisting section, an absorption section and a flue gas uniform distribution and dust removal section in sequence from top to bottom; an oxidization pond at the bottom of the tower is internally provided with an oxidized air distribution discharging pipe and a pump stirring device; a compressed air inlet, an ammonia water inlet and an absorption circulating pump inlet are formed in the outer side of the tower; an ammonium sulfate paste discharging pump inlet is formed in the bottom of the tower. The multi-section ammonia-process desulfurization and dust removal absorption tower for the heating flue gas of a calcining furnace of a carbon factory and the coke oven of a coking factory can efficiently finish a flue gas desulfurization and dust removal process in an energy-saving manner, and has relatively great industrialization prospect.

Description

technical field [0001] The invention relates to an ammonia-based desulfurization and dust removal absorption tower, in particular to a flue gas multi-stage ammonia-based desulfurization and dust removal absorption tower, which is applied to the technical fields of industrial gas pollutant discharge treatment systems and industrial waste resource recycling systems. Background technique [0002] There are many carbon plants and coking plants in my country. The SO contained in the flue gas produced by the calciner that produces carbon black in the carbon plant and the flue gas produced by heating the coke oven in the coking plant 2 About: 200~8000mg / Nm 3 , resulting in SO 2 Cause serious pollution to the atmosphere. To reduce SO 2 Harm, on January 1, 2015, the state requires coking enterprises to meet the emission concentration limits of coke oven chimneys in Table 6 of GB16171-2012 "Emission Standards for Pollutants in the Coking Chemical Industry", namely SO 2 ≤30mg / m 3 ...

AI Technical Summary

Problems solved by technology

However, at present, the subsequent treatment of ammonium sulfate in the traditional ammonia desulfurization process requires high energy consumption, and the entrainment of ammonium sulfate aerosol in the flue gas caused by the high-concentration absorption circulating fluid faces a serious problem of ammonium sulfate escape. At the same time, due to the presence of water The problem of fog entrainment reduces the treatment efficiency, and the effect of desulfurization and dust removal is not ideal

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