Low-temperature desulfurization and denitration device for flue gas and process thereof

Abstract

The invention relates to a low-temperature desulfurization and denitration device for flue gas, the low-temperature desulfurization and denitration device comprises an ash removal device, an oxygen regulation device, an absorption tower and an absorption liquid circulation tank, wherein the ash removal device, the oxygen regulation device and the absorption tower are sequentially communicated through a flue gas pipeline, the front end of the ash removal device is connected with a flue gas inlet, a flow regulating valve is arranged between the flue gas inlet and the ash removal device, a firsttemperature control device is arranged between the ash removal device and the oxygen regulation device, a second temperature control device is arranged between the oxygen regulation device and the absorption tower, an induced draft fan is arranged between the second temperature control device and the absorption tower, a first valve is arranged between the first temperature control device and the ash removal device, and the absorption liquid circulation tank is connected with the absorption tower; granular substances in the flue gas can be sufficiently separated, the moving path of the flue gasin the absorption tower is prolonged, the reaction time is prolonged, and the flue gas is subjected to sufficient desulfurization and denitration reaction, so that the flue gas reaches the emission standard.

Description

Technical field [0001] The invention relates to the technical field of flue gas purification, in particular to a low-temperature flue gas desulfurization and denitration equipment and a process thereof. Background technique [0002] In the flue gas denitration market in my country, the selective catalyst reduction (SCR) technology is my country’s NO X The main technology of emission control, but its active temperature is 380-420℃, and the coking flue gas is about 180℃ after waste heat recovery, which is much lower than the SCR catalyst activity temperature. According to the process characteristics of my country's coking flue gas, research and development of medium and low temperature conditions The new technology of flue gas desulfurization and denitrification is an important measure to achieve sustainable development in my country, which will bring huge economic and environmental benefits. With the development of flue gas desulfurization and denitrification technology, countries ...

AI Technical Summary

Problems solved by technology

With the development of flue gas desulfurization and denitrification technology, all countries have carried out research on low-temperature flue gas simultaneous desulfurization and denitrification technology, but there is no mature low-temperature denitrification technology at home and abroad, and they are all in the research and development and testing stages. Existing technologies still exist There are many problems, such as the flue gas contains a large amount of particulate matter, and the desulfurization and denitrification are not sufficient. Especially in the wet process, the particulate matter will greatly affect the desulfurization and denitrification reaction of the flue gas, and affect the full contact and reaction between the flue gas and the absorption liquid. Make the smoke emission not meet the standard

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