A method for synergistic and efficient emission reduction of dioxin-like substances and NOx in the process of domestic waste incineration

Abstract

The invention discloses a process of dioxin-like substances and NO x Synergistic and efficient emission reduction methods. The sodium-based compound composition is mixed with the denitrification reducing agent urea, and the aqueous solution of the mixture is atomized and sprayed into the flue at a temperature range of 850-1050°C through the SNCR system, and at the same time, it can suppress the formation of dioxins and increase NO x The purpose of removal efficiency. The sodium-based compound composition is composed of sodium carbonate and sodium sulfide; in the composition, the mass percentage of the sodium carbonate is 20% to 80%, and the mass percentage of the sodium sulfide is 20% to 80%. 80%. The usage amount of the sodium-based compound composition is 10%-40% of the mass of urea. The method is simple and easy to operate, and the operation cost is low, and it can be used for dioxin-like substances and NO in domestic waste incineration facilities. x Provide technical support for up-to-standard discharge.

Description

technical field [0001] The invention belongs to the field of incineration and disposal of solid waste in the field of environmental protection, and specifically relates to a method for simultaneously realizing the generation control of dioxins and the efficient removal of nitrogen oxides during the incineration process of domestic waste. Background technique [0002] Incineration has become the main way of domestic waste disposal in my country. During the incineration and disposal of domestic waste, highly toxic dioxin-like substances will be generated, and a large amount of nitrogen oxides (NO x )emission. In order to control the emission of dioxins, my country's large-scale modern waste incineration power generation facilities generally adopt "3T+E" technology (controlling incineration temperature, mixing degree, gas residence time, and excess air rate), flue gas quenching technology and activated carbon + bag filter technology, despite this, the emission level of dioxins...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of producing a large amount of dioxins in the process of garbage incineration. Based on the SNCR system of a large-scale modern garbage incineration power plant, without adding new equipment, it provides a kind of dioxin in the process of domestic garbage incineration. Species and NO x Synergetic efficient emission reduction method, what the SNCR system of the present invention uses is the SNCR system reported in the literature (Research to application. Progress in Energy and Combustion Science, 1997,23 (3): 233~266)