The utility model discloses an SNCR (selective non-catalytic reduction) denitration
automatic control system which comprises an
ammonia water storage and supply
system, a desalting water
system, a
control system, a metering and mixing system, a fire-fighting spraying and
ammonia gas leakage alarm system and a distribution injection system, the
ammonia water storage and supply system comprises an ammonia
water storage tank; the demineralized water system comprises a demineralized water tank; the inlet end of the ammonia
water storage tank is connected with an ammonia water mother
pipe electric switch valve, the outlet end of the ammonia
water storage tank is connected with the inlet end of the ammonia water conveying pump, and the outlet end of the ammonia water conveying pump is connected with the metering and mixing system; the inlet end of the demineralized water tank is connected with the demineralized water main
pipe electric switch valve, the outlet end of the demineralized water tank is connected with the inlet end of the demineralized
water delivery pump, and the outlet end of the demineralized
water delivery pump is connected with the metering and mixing system; according to the device, ammonia water and demineralized water can be fully automatically, efficiently and accurately mixed, and the mixed liquid is accurately and efficiently sprayed into a
hearth, so that manpower and resources are saved, the production efficiency is improved, and the enterprise cost is reduced.