Urea catalytic hydrolysis ammonia production process and precise ammonia spraying device

Abstract

The invention discloses a urea catalytic hydrolysis ammonia production process and a precise ammonia spraying device, and relates to the technical field of ammonia production equipment. The device comprises a urea dissolving tank, a urea solution storage tank is arranged on one side of the urea dissolving tank, a urea hydrolysis reactor is arranged on one side of the urea solution storage tank, a hydrolysis catalyst storage tank is arranged on one side of the urea hydrolysis reactor, and a catalyst is arranged in the hydrolysis catalyst storage tank; and a steam-water separation device is arranged in the urea hydrolysis reactor. The chemical property of the catalyst is similar to that of urea, the catalyst does not contain heavy metal components and is safe, environmentally friendly and low in price, the catalyst is low in consumption in the catalytic process, the production cost is reduced, environmental pollution is reduced, the DCS system can conduct online leveling on the device, samples are simultaneously extracted from multiple points at an outlet of the device and an average value is calculated.

Description

technical field [0001] The invention belongs to the technical field of ammonia production equipment, and in particular relates to a urea catalytic hydrolysis ammonia production process and a precise ammonia injection device. Background technique [0002] my country's electricity supply is dominated by coal-fired thermal power generation, and the combustion of boilers in thermal power plants produces a large amount of flue gas, of which NOx is the nitrogen oxide compound NOx is the main pollutant that causes photochemical smog and acid rain. In 2012, the "Emission Standards of Air Pollutants for Thermal Power Plants" was officially implemented. All fossil fuel combustion boilers must be equipped with denitrification devices to control the impact of NOx on the environment. The most commonly used SCR denitrification process technology is under the action of metal catalysts. Use ammonia to reduce NOx in the flue gas to produce N2, so as to achieve the emission of NOx up to the s...

AI Technical Summary

Problems solved by technology

[0003] Most of the catalysts used in the existing urea catalytic hydrolysis ammonia plant are expensive, and the catalyst consumes a lot in the catalytic process, thus increasing the production cost of ammonia

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