Urea hydrolyzing ammonia production system and process applied to denitration in thermal power plant

Abstract

The invention discloses a urea hydrolyzing ammonia production system and process applied to denitration in a thermal power plant. The urea hydrolyzing ammonia production system comprises a vertical hydrolysis reactor, a steam pipeline, a urea solution filling pipeline and a product gas discharging pipeline; a reactor barrel, a reactor upper end socket and a reactor lower end socket encircles a sealed hydrolysis reaction cavity; a liquid remover is arranged at the upper part of the hydrolysis reaction cavity; a plurality of supersonic steam nozzles are formed in the lower part of the hydrolysis reaction cavity; the supersonic steam nozzles are communicated with a steam inlet. Through the supersonic steam nozzles, a urea solution is directly heated by steam for urea hydrolysis reaction; the urea hydrolyzing ammonia production system is simple in structure and reasonable in design, reduces equipment investment and corrosion risks of a hydrolysis reactor; a urea hydrolyzing ammonia production process is simple in operation, convenient, safe and high in operability.

Description

technical field [0001] The invention relates to the technical field of flue gas denitrification (nitrogen), in particular to a urea hydrolysis ammonia production system applied to thermal power plant denitrification and a process thereof. Background technique [0002] By the end of 2012, my country's full-scale power generation installed capacity had reached 1.145 billion kilowatts, of which thermal power accounted for 71.55%; full-scale power generation reached 4.98 trillion kWh, of which thermal power accounted for 78.57%. my country's "Twelfth Five-Year Plan" proposes that by the end of 2015, energy consumption per unit of GDP will be reduced by 16% compared with 2010, carbon dioxide emissions will be reduced by 17%, and sulfur dioxide and nitrogen oxide emissions will be reduced by 8% and 10% respectively. Thermal power generation is my country's primary energy consumption and pollutant emissions major, its carbon dioxide emissions accounted for about 40%, sulfur dioxide...

AI Technical Summary

Problems solved by technology

[0008] At present, the urea hydrolysis reactor uses a steam partition wall heat exchanger to heat the urea solution to realize the hydrolysis process of urea. Due to the corrosiveness of the urea hydrolysis process, stainless steel is often used to make the urea hydrolysis reactor. Hidden danger

In addition, the method of partition heating is adopted, and the control speed is relatively slow, which is not conducive to adapting to the requirements of rapid peak regulation of the unit

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