Integrated method of desulfurization, denitrification and dust removal

Abstract

The invention provides an integrated method of desulfurization, denitrification and dust removal. The method includes the following steps of bag dust removal, high temperature dust removal, dust blowback, denitrification treatment and desulfurization treatment. The method has the advantages that the integrated method of desulfurization, denitrification and dust removal can filter away particulatematter in flue gas, meets the requirements of the temperature zone required by a desulfurization and denitrification device, catalyst blockage does not occur, and a lot of operation and maintenance costs for operation and maintenance of the enterprise are saved. The upper part of a dust remover is provided with an air bag to blow the particulate matter downward, collection and discharge of the particulate matter are facilitated, and cleaning of a bag filter is achieved.

Description

technical field [0001] The invention relates to the technical field of flue gas treatment, in particular to an integrated method for desulfurization, denitrification and dust removal. Background technique [0002] With the development of flue gas desulfurization and denitrification technologies, all countries have carried out research on simultaneous flue gas desulfurization and denitrification technologies, with the aim of developing a new SO / NO combined desulfurization technology with a lower cost than the traditional FGD and SCR combined process. The new process is in the development stage and has not yet been commercially applied. Dust is one of the important pollution sources. The exhaust gas from coal-fired boilers contains a large amount of SO, nitrogen oxides, and a large amount of soot. Therefore, while desulfurization and denitrification , dust removal must be considered; [0003] In the existing industrial desulfurization and denitrification technology, the tempe...

AI Technical Summary

Problems solved by technology

[0002] With the development of flue gas desulfurization and denitrification technologies, all countries have carried out research on simultaneous flue gas desulfurization and denitrification technologies, with the aim of developing a new SO / NO combined desulfurization technology with a lower cost than the traditional FGD and SCR combined process. The new process is in the development stage and has not yet been commercially applied. Dust is one of the important pollution sources. The exhaust gas from coal-fired boilers contains a large amount of SO, nitrogen oxides, and a large amount of soot. Therefore, while desulfurization and denitrification , dust removal must be considered;

[0003] In the existing industrial desulfurization and denitrification technology, the temperature of the flue gas in the traditional dust removal process is generally limited to about 200-250 degrees. Overheating will cause damage to the dust removal system, and the cost of replacing the internal components of the dust removal is high. Use the flue gas to cool down before entering the dust removal system , although it has played a good role in protecting the dust removal system, but the temperature required for SCR denitrification in the later period cannot be reached instead, resulting in low reaction efficiency of the denitrification catalyst, or no reaction directly. The dust content in the flue gas is high, which will cause blockage of the catalyst, and the cost of replacing the catalyst is high; therefore, we propose an integrated method of desulfurization, denitrification and dust removal to solve the problems mentioned in the above background technology