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中间过热器的设计与汽轮机的调节方法有关。从经济方面看来,对二次汽温不一定要进行调节;但从工作安全方面来看,这种调节是必要的。在不同负荷下,二次汽温的变化同中间过热吸收炉膛辐射热的百分量有关。用喷燃器倾角调节时,二次汽温的变动最灵敏,因而适于作动态调节。烟气再循环是最常用的调节方法,所需再循环烟量同中间过热器所处的烟温地带有关。烟气再循环会增大锅炉机组的排烟热损失。蒸汽旁路的调节方法不影响一次汽温,但中间过热器所需金属用量增多。当用烟气挡板调节时,如一次和二次过热器并例工作,则二次汽温的调节将增大一次汽温调节的困难。实际上每种调节方法均有一定的适用条件和调节幅度的限制。
Intermediate superheater design and turbine regulation methods. From an economic point of view, the secondary steam temperature does not necessarily need to be adjusted; but from the job safety point of view, this adjustment is necessary. Under different loads, the variation of the secondary steam temperature is related to the percentage of the radiant heat of the intermediate superheating furnace. With burner angle adjustment, the second temperature changes the most sensitive, and therefore suitable for dynamic regulation. Flue gas recirculation is the most commonly used method of regulation, and the amount of recirculation smoke required is related to the flue gas temperature zone in which the superheater is located. Flue gas recirculation will increase the exhaust heat loss of the boiler unit. Steam bypass adjustment method does not affect the first steam temperature, but the intermediate superheater required amount of metal increased. When using flue gas damper adjustment, such as the first and second superheater and work together, the adjustment of the secondary steam temperature will increase once the difficulty of regulating the temperature of the steam. In fact, each adjustment method has a certain application conditions and regulatory limits.