Sintering and pelletizing flue gas desulfurization and denitrification coordinating management system and process

Abstract

The invention relates to a coordinating management system and process for sulfur dioxide, oxynitride, heavy metal, dioxin and other pollutants in flue gas emitted in the sintering and pelletizing processes in the metallurgical industry. The system comprises a booster fan 1, a flue gas heat exchanger 2, a combustor 3, a denitrification reactor 7 and a desulfurization tower 8. The flue gas heat exchanger 2 is a rotary type or tubular heat exchanger. Sintering and pelletizing flue gas after dust removal enters the booster fan 1. The booster fan 1 is connected with an inlet a of the flue gas heat exchanger 2 through a flue. An outlet b of the flue gas heat exchanger 2 is connected with the combustor 3. An outlet of the combustor 3 is connected with the denitrification reactor 7 through a flue. A denitrification reductive agent injector 4 is arranged on the flue through which the combustor 3 is connected with the denitrification reactor 7. An outlet of the denitrification reactor 7 is connected with an inlet c of the flue gas heat exchanger 2. An outlet d of the flue gas heat exchanger 2 is connected with the desulfurization tower 8. The sintering and pelletizing flue gas desulfurization and denitrification coordinating management system and process have the advantages that operation is stable and reliable, investment is lowered, operating cost is low, and by-products can be comprehensively utilized, thereby being a sintering and pelletizing flue gas desulfurization and denitrification coordinating management technology suitable for national conditions of China.

Description

technical field [0001] The invention relates to flue gas desulfurization and denitrification collaborative treatment technology, in particular to a multi-pollutant collaborative treatment system and process for sulfur dioxide, nitrogen oxides, heavy metals, dioxins and other pollutants in flue gas discharged from sintering and pelletizing processes in the metallurgical industry. Background technique [0002] In February 2014, the Ministry of Industry and Information Technology issued the "Plan for Promoting Cleaner Production Technology in Key Industries" (Draft for Comment), which will implement cleaner production technology transformation for key industries such as iron and steel, nonferrous metals, petrochemicals, chemicals, and building materials. It is expected that by the end of 2017, the annual Reduce major pollutants such as sulfur dioxide by about 871,000 tons, nitrogen oxides by about 595,000 tons, industrial smoke (powder) dust by about 1.598 million tons, and vola...

AI Technical Summary

Problems solved by technology

This method has problems such as low desulfurization efficiency, difficulty in utilizing by-products and inability to remove dioxins and heavy metals.

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