A process and its device for realizing boiler flue gas discharge up to standard by using coupling technology

Abstract

The invention discloses a process and a device for realizing up-to-standard emission of boiler flue gas with a coupling technology. The device comprises an electrostatic synergetic dust remover, wherein the electrostatic synergetic dust remover is connected with an induced draft fan through a flue I, the other end of the induced draft fan is connected with an inlet of a desulfurizing tower through a flue II, and an outlet of the desulfurizing tower is connected with a chimney through a flue III; a mixer is arranged in the flue I; an ozone generator is connected with the mixer through an ozone delivery pipeline; a process water tank is connected with the electrostatic synergetic dust remover and the ozone generator respectively through water delivery pipelines. According to the process and the device, measures such as partial transformation of an existing electrostatic dust remover, addition of the ozone generator and the like are taken, coupling of three technologies of electrostatic synergetic dust removal, ozonation and wet absorption is realized successfully, and units such as an oxidation reactor, an absorption tower and the like are not required to be newly built for technology implementation, so that the process and the device have the advantages of low investment, small occupied area, low transformation workload, low operation cost and the like.

Description

technical field [0001] The invention relates to a process and a device for realizing boiler flue gas up-to-standard discharge by using coupling technology, and belongs to the technical field of flue gas purification. Background technique [0002] Since July 1, 2014, existing thermal power boilers have begun to implement the emission limits for smoke, sulfur dioxide, nitrogen oxides, and smoke blackness specified in Table 1 of the "Emission Standards for Air Pollutants from Thermal Power Plants" (GB13223-2011). And since January 1, 2015, mercury and its compounds emitted by coal-fired power generation boilers also have emission limits. At the same time, the new "Emission Standard of Air Pollutants for Boilers" (GB13271-2014) has been implemented since July 1, 2014. Air pollutants such as chemical compounds have stricter emission requirements. [0003] With the introduction of new emission standards, during the "Twelfth Five-Year Plan" period, more than 80% of active thermal...

AI Technical Summary

Problems solved by technology

The problem with this method is that it needs to build a new circulating fluidized bed reactor and its supporting facilities, and the system is more complicated.

The problem with this method is that it does not consider the relationship between ozone and NO, SO 2 The reaction rate difference

[0008] In short, there are still problems in the implementation of the above-mentioned joint removal related technologies such as complex transformation system, high transformation cost, new land occupation and large energy consumption.

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