Desulfurization and denitrification process control system for normal-temperature waste gas and use method of desulfurization and denitrification process control system

Abstract

The invention discloses a desulfurization and denitrification process control system for normal-temperature waste gas and a use method of the desulfurization and denitrification process control system. The desulfurization and denitrification process control system comprises an SO2 adsorption unit, a desulfurization spray tower (4), a denitrification spray tower (9), an oxidation box (10) and an air heating and ozone generating unit. The SO2 adsorption unit is formed by connecting a first SO2 adsorption unit (3) and a second SO2 adsorption unit (11) in parallel; the air heating and ozone generating unit comprises an ozone generator (13) and a heating system (15); and the outlet of the desulfurization spray tower (4) and the outlet of the denitration spray tower (9) are sequentially connected with a dehydrator (5), an ozone decomposition unit (6), an NOX and SO2 online monitoring system (7) and a chimney (8). According to the invention, the SO2 adsorbing material is adopted, so that the separate treatment of SO2 and NOX is realized, the recycling of H2SO4 and HNO3 is realized, the economic added value is obviously increased, and the NOX can be directly converted into N2 to be directly discharged.

Description

technical field [0001] The invention belongs to the technical field of industrial waste gas treatment, in particular to a desulfurization and denitrification system for industrial waste gas and its use method, especially suitable for SO in normal temperature waste gas of small and medium-sized enterprises. 2 and NO X governance. Background technique [0002] Currently, SO emissions from industrial activities 2 and NO X Emissions are also increasing along with the rapid economic growth, and the accompanying nitrogen oxide emissions are rising rapidly. NO X Nitrogen oxide fog discharged into the atmosphere will undergo a photochemical reaction under the irradiation of ultraviolet rays in the sun to produce a photochemical smog; SO 2 Emission into the air causes acid rain, both of which seriously endanger human health and the environment. For this reason, the country has issued a series of policies and regulations to limit SO 2 and NO X emissions. [0003] With the inc...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing industrial flue gas desulfurization and denitrification system has large investment, high operating cost and no treatment for SO in the flue gas. 2 and NO X In the case of comprehensive utilization and secondary pollution of waste, a desulfurization and denitrification process control system for normal temperature waste gas is provided, which can treat SO2-containing waste gas discharged at normal temperature 2 and NO X Purify the exhaust gas, and achieve ultra-low emissions, and finally meet the emission standards, while achieving H 2 SO 4 Recyclable, HNO 3 Recycle or NO X decomposed into N 2 direct discharge

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