Novel boiler main steam temperature regulating device and control method
A main steam temperature and boiler technology, which is applied in the field of new boiler main steam temperature adjustment devices, can solve problems such as thermal fatigue cracks, leakage of desuperheating water for regulating valve cage and valve core, impact of steam turbine blades, etc., so as to avoid thermal fatigue damage and ensure Stability, guaranteed fast effect
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[0025] Example 1:
[0026] as attached figure 1 As shown, the new boiler main steam temperature adjustment device in this embodiment includes a series-connected primary superheater 6 and a screen superheater 7, one end of the primary superheater and the desuperheating steam pipeline and the front The steam pipelines are respectively connected, the screen superheater is connected with one end of the steam pipeline in front of the inlet pipe group of the secondary superheater, and the other end of the steam pipeline in front of the inlet pipe group of the secondary superheater is connected with the desuperheating steam pipeline One end of the secondary superheater is connected to the inlet pipe group of the secondary superheater respectively, the inlet pipe group 12 of the secondary superheater is connected in series with the outlet pipe group 13 of the secondary superheater, and the outlet pipe group of the secondary superheater is connected in series with the main steam pipeli...
Example Embodiment
[0032] Example 2
[0033] This embodiment of the new boiler main steam temperature adjustment method adopts the adjustment device described in Embodiment 1, and the main steam temperature detected by the main steam temperature measurement device and the secondary superheater inlet pipe are measured by the desuperheating steam pipeline control valve. The steam temperature in front of the inlet pipe group of the secondary superheater detected by the steam temperature measurement device before the group is adjusted and controlled, wherein the control method of the steam temperature in front of the inlet pipe group of the secondary superheater is: using a decentralized control system to conduct cascade PID control. Automatic adjustment, in which the main steam temperature is the main control variable, and the steam temperature before the inlet pipe group of the secondary superheater is the secondary control variable; the desuperheating steam pipeline isolation valve is used to quic...
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