Device for producing ammonia gas through pyrolysis of urea by using high-temperature flue gas as heat source

Abstract

The invention relates to the field of processes for producing ammonia gas through urea, and aims to provide a device for producing ammonia gas through pyrolysis of urea by using high-temperature flue gas as a heat source. The device for producing ammonia gas through pyrolysis of urea by using high-temperature flue gas as the heat source comprises a rotational flow pyrolysis furnace, a bypass flue duct, a flue gas baffle, a mechanical atomizing spraying gun, a flue gas flow sensor, a flue gas temperature sensor, a booster fan, an ash discharging bucket, a pressure sensor and a temperature sensor. The device adopts a small amount of high-temperature flue gas close to a high-temperature superheater as the heat source for urea pyrolysis, adopts a cheap low-grade energy source to replace a high-grade energy source, and reduces the consumption of power required by urea pyrolysis and running cost; the device adopts the rotational flow pyrolysis furnace, so that the content of dust in flue gas is effectively reduced, the abrasion of dust against the booster fan is reduced, the work environment of the booster fan is improved, the service life of the booster fan is prolonged, meanwhile, uniform mixing of the urea and the high-temperature flue gas is ensured, and the pyrolysis efficiency of the urea is improved.

Description

technical field [0001] The invention relates to the technical field of urea ammonia production, in particular to a urea pyrolysis ammonia production device using high-temperature flue gas as a heat source. Background technique [0002] With the rapid development of the national economy and the improvement of people's living standards, energy consumption continues to increase. In 2011, coal consumption has reached 3.6 billion tons of standard coal, but the use of combustion as the main method has led to a sharp increase in air pollutants. Acid rain and smog occur frequently, and the pressure on the atmospheric environment continues to increase, causing dissatisfaction among people across the country. To this end, the country has issued a series of air quality standards and air pollution emission control standards. [0003] In the newly published "GB / T13223-2011 Air Pollution Emission Standards for Thermal Power Plants", NO 2 Calculated NOx emissions have stricter standards...

AI Technical Summary

Problems solved by technology

The main disadvantage of this ammonia production method is that the energy consumption is too large

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