Urea hydrolysis product gas flow control method, system and device

The invention discloses a urea hydrolysis product gas flow control method, system and device, and the method comprises the steps: S1, building a NOx concentration source state predictor of low-nitrogen combustion parameters in a coupling furnace based on the continuous operation data of a unit, and obtaining the NOx concentration source amount predicted in advance; s2, the advanced demand quantity of the gas production side of the urea hydrolysis system is obtained through calculation; and S3, controlling the opening degree of a steam valve according to the advanced demand quantity so as to realize the gas flow control of the urea hydrolysis product. According to the invention, urea hydrolysis product gas flow control can be realized. 本发明公开了一种尿素水解产品气流量控制方法、系统及装置，包括，S1、基于机组连续运行数据建立耦合炉内低氮燃烧参数的NOx浓度来源状态预估器，得到超前预测的NOx浓度来源量；S2、计算获得尿素水解系统产气侧的超前需求量；S3、根据超前需求量控制蒸汽阀门开度来实现尿素水解产品气流量控制。本发明可以实现尿素水解产品气流量控制。