Low-temperature desulfurization and denitration device for flue gas

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 equipment and technology for low-temperature desulfurization and denitrification in flue gas. Background technique [0002] In my country's flue gas denitrification market, selective catalyst reduction (SCR) technology is my country's NO X The main technology for emission control, but its active temperature is 380-420 °C, while the coking flue gas is about 180 °C after waste heat recovery, which is far lower than the SCR catalyst activation temperature. According to the process characteristics of coking flue gas in my country, the medium and low temperature conditions are developed The new technology of resource-based 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 techn...

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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