3. HOW DOES THE U2A® WORK?
Urea to Ammonia Process
Process Steps:- Urea is dissolved in deionized water
- Solution of 40-50% urea is pumped into a heated in-line reactor at a controlled flow rate
- Equilibrium conditions are maintained in the reactor
- Reactor produces a gaseous mixture of ammonia, carbon dioxide and water vapor
- Simple control of pressure, reactor heat and liquid to meet process dynamics
- Reactor off-take gas is further diluted with air
- Same mass and volume flow rates at the AIG
How U2A® Works : Process Flow Diagram
ELIMINATES TRANSPORTATION TRANSFER STORAGE OF TOXIC AMMONIA
Urea is the material of choice to avoid risk associated with ammonia. Some utility SNCR systems use urea to avoid ammonia. However, direct urea injection can cause damage to boilers. Converting urea to ammonia on site reduces the risk of boiler tube damage. Finally, direct urea injection is less economical to use than hydrolysis of urea to ammonia, since a significant percentage of the urea pyrolysis products are undesirable chemicals that do not participate in NOx reduction.
