Two-stage catalytic denitrification device and method for removing nitrate in water

• Main Authors: SHI RONG, JIA BOHAN, ZHANG ZHIQIANG, LU JINSUO, YUAN HONGLIN
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2020
• Subjects: CHEMISTRY; METALLURGY; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a two-stage catalytic denitrification device and method for removing nitrate in water. The device comprises a cylinder; a first-stage reaction unit and a second-stage reactionunit are sequentially arranged in the cylinder; a transition unit is arranged between the first-stage reaction unit and the second-stage reaction unit; and water to be treated firstly enters the first-stage reaction unit to be subjected to catalytic reaction and then enters the second-stage reaction unit through a transition unit to be subjected to catalytic reaction; the first-stage reaction unitis provided with a first catalyst, and the second-stage reaction unit is provided with a second catalyst. The catalytic device is provided with the two stages of catalytic reactors, and the reductionprocesses of the reactors are different, so that compared with a single catalytic reactor, the catalytic device is more favorable for controlling a reaction process. The pH value in the first-stage catalytic reactor is relativ