Title: Research and Application of Preventing Boiler Steam Overheating Strategy for Heat Supply Unit
Abstract: Boiler after transformation Low nitrogen combustion, low nitrogen and non-low nitrogen combustion mode switch increases the range of steam temperature change, The range of desuperheating water flow for steam temperature control has been great。According to these characteristics, this paper proposes using the steam enthalpy calculation heat balance the potential energy of the steam temperature forecast control algorithm, under different working conditions, calculated the desuperheating water flow, the steam temperature setpoint is automatically assigned and modified bu wall temperature value。The control of reduction temperature control setpoint of all stage except last are set automatically, using the secondary temperature-decreased water valve position automatically optimize in the main steam temperature control patent technology, the steam temperature is precision under control in various load cases of the boiler, the performance of steam temperature automatic control has been significantly improved, temperature-decreased water for each level can be automatically assigned, the frequency of overtemperature of the steam temperature and wall temperature has been reduced.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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