| abstract |
The invention relates to a production process for desulfurization and denitrification of an alkali recovery furnace by utilizing NaOH and NaClO, comprising the following steps: (1) flue gas after dust removal enters a desulfurization and denitrification tower, and dilute white liquor, a by-product produced in a causticization section of an alkali recovery system It is transported to the spray layer of the desulfurization and denitrification tower, and the dilute white liquor absorbs the sulfur dioxide in the flue gas; the NaClO solution is transported to the spray layer of the desulfurization and denitrification tower, and the NaClO solution oxidizes NO in the flue gas to high-value nitrogen oxides; (2) The desulfurized flue gas treated by the desulfurization and denitrification tower enters the washing tower, and then the industrial clean water is sent to the spray layer of the washing tower. The industrial clean water washes the residual salt in the desulfurized flue gas and absorbs high-value nitrogen oxides. The invention has a reasonable design, and uses NaOH and NaClO to desulfurize and denitrify the flue gas, which not only has good desulfurization and denitrification effects, low operating cost, but also can achieve standard discharge. |