Paper mill waste gas treatment equipment in pursuit of higher development needs!

　　People in the industrial production of waste gas purification equipment often heard which desulphurization denitrification, dust, dust and so on. But what is the denitration of flue gas? In the larger sense, flue gas desulfurization is the conversion of sulfur dioxide and dolomite slurry from industrial boilers to mature gypsum. The following people came to explain the denitrification of the exhaust gas purification equipment:

Denitration of flue gas of waste gas treatment equipment in paper mill

In the manufacturing process of industrial production, it can be divided into: denitrification of flue gas before ignition, denitrification of flue gas in the whole process of ignition, denitrification of flue gas after ignition. One is to fix at the root. Controlled calcination converts to NOx. The other is tail-end remediation. Manipulate NOx emissions from soot.

Denitrification technology of flue gas purification equipment can be divided into wet denitrification technology and semi-dry denitrification technology. It includes: acid digestion and absorption method, alkali digestion and absorption method, selective catalytic reaction and reduction method, non-selective catalytic reaction and reduction method, sorption method, positive ion body activity method and so on.

　　Denitrification of flue gas before ignition is carried out by using flue gas denitrification machine equipment, including hydrogenation denitrification of flue gas and mineral processing; Denitrification of flue gas during ignition includes ultra-low temperature ignition, oxygenation ignition, FBC ignition technology, selection of low NOx burner, separation of pulverized coal depth and dust circulation technology; The denitrification of flue gas after ignition includes selective non-catalytic reaction recovery flue gas denitrification (SNCR), selective catalytic reaction recovery flue gas denitrification (SCR), activated carbon filtration and electron beam denitrification.

Step of denitration of flue gas of exhaust gas purification equipment: the raw material (smoke and dust) sent by the blower motor is cleaned in the washing tower with tap water, and then cooled to 55-60℃. It is then mixed with the gas containing reducing agent from the air oxidation ultrasonic generator to oxidize the NOX air in the exhaust pipe. The proportion of reducing agent plus is generally controlled within the range of 0.5-1.7 (molar ratio of NO), so sulfurous acid gas is not oxidized by the air at this time. In addition, the floating dust in the dust is not a cost reducing agent, and the reducing agent can only selectively oxidize the air to NOX. The dust, oxidized by prepreg reductant air, is fed into the desulfurization tower, where it contacts with the absorption solution containing hydrochloric acid, sodium cyanide and ferric metal catalyst at a liquid-gas ratio of 30-50 l/m3 for thermal convection. In the desulfurization tower, some of the NOX is converted to sodium cyanide, while the rest is recovered to nitrous oxide or N2, which do not cause harmful vapors to be discharged together with the dust.

Around that is to say, people for everyone detailed understanding of the exhaust gas purification equipment denitration, the processing process has high efficiency, its project budget is low, simple layout, small footprint, suitable for the general plant renovation, the new plant can be based on the industrial boiler design scheme to cooperate with each other application, operation cost inferior characteristics.