SCR denitration technology and SCR denitration device for soil remediation tail gas

The invention discloses an SCR denitration technology and an SCR denitration device for soil remediation tail gas. The SCR denitration technology for soil remediation tail gas is characterized in thathigh-temperature tail gas goes through a flue, and is processed by the SCR system to form clean air, wherein the SCR system is composed of a reducing agent supply system, a reducing agent injection system, a reactor, a catalyst system and the like; the reducing agent supply system mainly comprises a urea preparation tank, a storage tank, a urea pump and the like; and the reducing agent injectionsystem mainly comprises a spray gun, a pipeline and a valve. The SCR technology is adopted for denitration, and urea is adopted as a denitration reducing agent, so the denitration efficiency reaches 66.7% or higher, and the NOx emission concentration of the tail gas can be less than or equal to 50 mg/Nm ; the tail gas denitration device is provided with a field PLC control system, and the operating state is transmitted to