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Urea Hydrolysis Catalyst: composite catalyst composed of high-purity ammonium dihydrogen phosphate and ammonium dihydrogen phosphate as carriers, and prepared with different proportions of aluminum oxide, titanium dioxide plus small amount of nickel vanadium compounds. Under certain temperature, pressure, and concentration conditions, it can quickly increase the rate of urea hydrolysis, reduce the energy consumption of flue gas denitrification systems (SCR) in thermal power plants, steel plants, coking plants, etc., enhance the adaptability of denitrification systems to unit operating conditions, and more efficiently meet environmental emission standards.
1. In principle, catalysts should be added after the first start-up or long-term shutdown of the unit, and shall not be added during operation. When the unit is running regularly and the hydrolysis reactor is discharged for multiple times, a small amount can be supplemented.
2. The catalyst configuration needs to be manually completed. Inject desalinated water into the catalyst box at the ratio of 1:1 to the amount of catalyst added. Heat the desalinated water, usually above 80 ºC. When the temperature reaches the desired level, start the catalyst tank agitator and pour in the catalyst while stirring, and dissolve the catalyst evenly through the agitator.
3.After dissolution is completed, start the catalyst pump and inject it into the hydrolysis reactor. The prepared solution should be injected into the reactor the soonest possible to prevent crystallization or failure. The catalyst solution added to the hydrolysis reactor for the first time is basically the same as the urea solution, with concentration ratio of 50%.
4.Catalysts have to be stored in a dry and cool place, away from direct sunlight, and protected from rain to prevent clumping and contamination of packaging bags.
5.After the catalyst pump is shut down and the catalyst box is used, it should be flushed to prevent blockage of the pump and pipeline due to catalyst crystallization.
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