Research Of Thermal Deviation Governance Of 1000MW Tower Boiler

With the rapid development of China’s electric power industry, thermal power generating units showing a significant high-capacity, high-parameter trends. China Electricity Council data released by the end of 2014,1000MW unit accounted for nearly 30% of the total installed capacity of thermal power. This part of the unit operation reliability merits of the quality of the entire power grid, economy has a very important impact. The operation and practice, large-capacity, high-parameter main boiler heating surface is more prone to severe thermal bias problem, and frequently lead to the boiler heating surface occurs mainly over temperature burst pipes, seriously affecting the safe operation of the boiler, and great damage the boiler economy.For this outstanding issue thermal heat deviation towards high-capacity, high-parameter direction facing the current development process, the paper mechanism boiler heating surface thermal deviation mainly generated from the start, the main factors causing the main boiler heating surface thermal deviation analysis, calculate boiler the main heating surface thermal coefficient of variation, targeted control measures proposed to reduce the number of boiler heating surface of the main heat bias. First, run diagnostics from the engineering, numerical simulation, temperature characteristics of the tube to calculate the temperature distribution of the main parameters affecting angles reviewed research on boiler thermal deviation, summarize boiler thermal deviation, especially on ultra-supercritical thermal deviation problems status quo for this study provided inspiration. Then causes deviation from the flue gas heat boiler and steam side analysis, and summarize the distribution of the thermal load of the boiler heating surface, for the following reasonable thermal deviation governance program provides theoretical reference; then from the heat load uniformity coefficient, thermal deviation correlation parameter calculation, distribution/bus header static pressure, flow coefficient and uneven flow distribution analysis of the tower boiler 1000MW thermal deviation calculated for the following specific thermal deviation governance programs provide quantitative reference. Then to a factory boiler 1000MW Tower as a case to analyze structural characteristics of the boiler and heat bias current situation, calculate the thermal variation of the boiler, combined heat deviation calculation status and thermal coefficient of variation proposed governance for the boiler heat Deviation program, and by running the boiler thermal deviation data analysis after transformation thermal deviation effect of governance. Finally, the deficiencies of the present study were summarized and prospect follow-up studies.Analysis of the results of project examples show that:the mechanism and thermal deviation from the perspective of the boiler thermal deviation calculation boiler heat deviation caused by specific factors and to develop control measures, the boiler thermal deviation of governance has a very important significance. After the transformation of operational data showed that the thermal Deviation boiler has been significantly improved.