Building method for combustion energy radiant energy signal in coal-fired thermal power generating unit boiler

• Main Authors: ZHOU HUAICHUN, ZHOU YUANKE, LIU ZHUWEI
• Format: Patent
• Language: English
• Published: 09.09.2015
• Subjects: BLASTING; CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FORCOMBUSTION CHAMBERS, e.g. FIREBRIDGES; COMBUSTION APPARATUS; COMBUSTION PROCESSES; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDEDFOR; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS INCOMBUSTION CHAMBERS; HEATING; LIGHTING; MECHANICAL ENGINEERING; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTIONAPPARATUS; WEAPONS

The invention discloses a building method for a combustion energy radiant energy signal in a coal-fired thermal power generating unit boiler and belongs to the technical field of thermal power plant boiler combustion monitoring and control. Firstly, image information of combustion flame is obtained through a plurality of flame image detectors arranged on different height positions along a boiler chamber, the grey value of each image is calculated in real time and transformed into a measuring range same as the thermal power generating unit actual generated power and defined as an initial radiant energy signal. Secondly, dynamic compensation data processing is performed on the initial radiant energy signal by the use of the value of the thermal power generating unit actual generated power, and the final radiant energy signal is obtained. Finally, the final radiant energy signal serves as a detection value of energy level in the boiler to be output to a coordinated control system of the thermal power generating unit. The application result shows that the radiant energy signal built by the method can effectively reflect the pulsatility of flame in the boiler chamber, the signal deviation caused by detector ash deposition and coking and other factors is eliminated, and the building method can be suitable for continuous on-line optimal control of thermal power generating units with different types and different capacities.