3results about How to "Meticulously divided" patented technology

The invention relates to the field of boiler systems, and discloses a temperature adjusting system for a last-stage reheater of a boiler, which is used for improving the operation safety and reliability of the last-stage reheater of the boiler. Comprising the steps of collecting real-time temperature data of key parts of a boiler by connecting a power plant SIS or DCS system, and additionally installing a thermocouple enhancement data set to generate a temperature data set containing spatial position information. And calculating to obtain the three-dimensional temperature field distribution of the pipeline by using a model considering the dynamic change of the oxide skin. And based on the distribution, monitoring overtemperature points in real time, and generating temperature state evaluation and overtemperature early warning information. According to the invention, an equipment life prediction model is established, the damage accumulation degree of the pipeline material is evaluated, the residual life is predicted, a preventive maintenance strategy is made, and a maintenance plan suggestion is generated and integrated to a power plant maintenance plan system to guide equipment maintenance management.

The application discloses a control method based on a feedforward adaptive periodic complex expert controller, and comprises the following steps: identifying a power load of a generator and determining the generator with added or reduced load; according to the change trend of a low-low pressure steam header pressure and a steam pressure at a generator outlet, corresponding state types and control output periods are given; according to the output conditions met by the steam pressure, controller control output is carried out according to the met output conditions. The application not only relies on the low-low pressure steam pressure as feedback for control, but also considers the interference of the generator load and the inlet steam pressure on the low-low pressure steam pressure, so that fluctuations caused by untimely adjustment of single feedback control can be avoided, and fluctuations caused by the generator load and the inlet steam pressure can be overcome; through the technology, the controller can intelligently judge the danger of the low-low pressure steam pressure at the current time, and dynamically adjust the output period.