Application and Optimization of Urea Pyrolysis Technology in 1 000 MW Coal-fired Power Plant

Abstract

Urea pyrolysis technology has been applied in many coal-fired power plants with it's advantages of safety and nontoxicity, but there are problems such as sediment plugging in the application. A 1 000 MW unit with urea pyrolysis system was seriously blocked in pyrolysis furnace, export pipeline and ammonia spraying grid, for pyrolytic air lacking caused by the abrasion of bofoster fans, electric heater output limiting, poor atomization effect of spraying guns and so on. According to regular inspection and cleaning, optimizing and adjusting operation parameters, enhancing system control, the problem of blocking was solved. The consumption of urea was reduced, 1.3 million yuan of cost was cut down every year. The reliability and economy of units were increased.

Keywords

• coal-fired power plant
• selective catalytic reduction (scr)
• urea pyrolysis
• intermediate reaction
• sediment
• hot primary air