Regeneration system and method for synergistically removing multiple pollutants in flue gas

Abstract

The invention discloses a regeneration system and method for synergistically removing multiple pollutants in flue gas; after boiler flue gas passes through a primary economizer, one path of flue gas is connected to a flue gas inlet of a main area of an air preheater, and the other path of flue gas is connected to a flue gas inlet of a regeneration area; one path of cold air is connected to an air inlet of the main area through a main air blower, and the other path of cold air is connected to an air inlet of a cooling section through a regenerated air blower; an air outlet of the cooling section is connected to an air inlet of a preheating section, an air outlet of the preheating section is connected to an air inlet of the regeneration area, and an air outlet of the regeneration area of the air preheater is connected to an air inlet of a heating section; and the air outlet pipeline of the heating section and the hot air outlet pipeline of the main area are gathered and then enter a boiler. The flue gas at the tail of the boiler is used for heating air for regeneration treatment of an adsorbent, heat is recycled in a stepped mode, utilization is sufficient, the operation cost is reduced, a back flushing system does not need to be additionally arranged, and the initial investment of the device is reduced.

Description

technical field [0001] The invention belongs to the technical field of flue gas pollutant treatment and purification, and in particular relates to a regeneration system and method for synergistic removal of multi-pollutants in flue gas. Background technique [0002] The removal tower and the regeneration tower are the core equipment of the flue gas integrated purification technology of the activated coke dry method. The fixed bed removal tower and the moving bed removal tower are mostly used in industry. At present, due to the intermittent operation mode of the fixed bed removal tower The inability to adapt to the situation of dealing with large flue gas volumes promotes the widespread application of moving bed removal towers. However, when the existing moving bed technology is applied, the regeneration and desorption of the adsorbent has higher requirements than the removal of the pre-process. Regeneration and desorption The more thorough the sorbent, the greater the loadin...

AI Technical Summary

Problems solved by technology

[0002] The removal tower and the regeneration tower are the core equipment of the flue gas integrated purification technology of the activated coke dry method. The fixed bed removal tower and the moving bed removal tower are mostly used in industry. At present, due to the intermittent operation mode of the fixed bed removal tower The inability to adapt to the situation of dealing with large flue gas volumes promotes the widespread application of moving bed removal towers. However, when the existing moving bed technology is applied, the regeneration and desorption of the adsorbent has higher requirements than the removal of the pre-process. Regeneration and desorption The more thorough the sorbent, the greater the loading, the smaller the mobile cycle, and the lower the wear loss

[0003] At present, in the flue gas activated coke combined desulfurization and denitrification process, the active coke regeneration system mostly uses electric heaters or hot blast stoves to consume electric energy or gas as a heat source, which increases equipment investment, complicates the system and improves the operation of the entire device. cost

Images