Sintering flue gas dioxin and particulate matter synergism purification equipment and method

Abstract

The invention discloses a sintering flue gas dioxin and particulate matter synergism purification equipment and a sintering flue gas dioxin and particulate matter synergism purification method. The equipment comprises a filtering device, wherein the filtering device comprises a dust-containing flue gas inlet and a fresh air outlet; a flat sheet membrane reactor is arranged in the filtering device; a selective permeable membrane through which dioxin and oxygen can pass is arranged on the flat sheet membrane reactor; the flat sheet membrane reactor is separated to form a gas permeation cavity positioned on the lower part and a liquid permeation cavity positioned on the upper part through the selective permeable membrane; dioxin degradation reaction liquid is arranged in the liquid permeation cavity. According to the purification equipment and the purification method, the dioxin and particulate matters in the sintering flue gas can be synchronously removed, and the equipment is simple in structure and safe and stable in operation and has the advantages that the dust removal efficiency is high, secondary pollution is avoided and the like.

Description

technical field [0001] The invention belongs to the field of sintering flue gas purification, and in particular relates to a device and method for synergistic purification of dioxin and particulate matter in sintering flue gas. Background technique [0002] Dioxin is the most poisonous substance in the world, and its toxicity is 1000 times that of potassium cyanide. According to the survey, the annual discharge of various dioxins in my country is about 10.2kg-TEQ, of which the discharge from iron and steel smelting is 4.59kg-TEQ, accounting for 45% of the total. Dioxin control in the iron and steel industry takes the brunt of the sintering process, and its emissions account for 60% of the total. my country has promulgated the "Steel Sintering and Pelletizing Industry Air Pollutant Emission Standard" (GB28662-2012), which includes There are clear requirements for particulate matter emissions, but currently there is no mature and reliable dioxin purification technology for ind...

AI Technical Summary

Problems solved by technology

At present, the purification of sintering particulate matter is mainly based on the electric dust removal process, but due to the influence of the composition of the sintering flue gas, the dust removal efficiency of the electric dust removal is low and unstable, resulting in a high absolute value of the emission and is unstable or even substandard. At the same time, the particulate matter in the flue gas It is also not conducive to the subsequent purification of dioxins

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