基于生物质燃料特性的小型锅炉炉膛关键热力参数研究

发布时间：2018-05-18 02:07

  本文选题：燃料特性 + 能效测试　； 参考：《华南理工大学》2016年硕士论文

【摘要】：锅炉设计四大计算之一的热力计算是影响锅炉安全和性能的显著因素。由于生物质与煤的燃料特性差异较大,热力计算时采用《工业锅炉设计计算方法》难免会出现一定的偏差,为了验证设计时的热力计算结果的准确性,需要依据生物质锅炉能效测试结果,来判断计算公式中所使用的系数是否恰当,并校核出更准确的热力计算系数来完善生物质锅炉的热力计算。系统调研了广州市生物质蒸汽锅炉燃料及能效测试的现状,通过分析大量的生物质蒸汽锅炉的锅炉出力、排烟温度、锅炉效率、燃料消耗量、过量空气系数等数据,找出了生物质蒸汽锅炉炉膛实际测试数据与按照《工业锅炉设计计算方法》设计的热力计算数据的偏差,经过计算发现参数?、p对炉膛辐射换热影响较大,进而影响炉膛出口烟气温度,其它系数对炉膛出口烟气温度的影响基本可以忽略。修正参数?、p值(分别为0.5608、0.2144)并经过设计和测试验证。进行了对流受热面的设计校核,发现由于原设计的炉膛出口温度超过实际出口温度太大,造成了原设计的烟气出口温度不合理。将原设计的烟气出口温度修订为210℃后,再次进行计算并校核满足要求。而节能器的设计校核不合格是原设计的对流烟道出口温度超过实际出口温度20℃所造成,证明了节能器的结构设计需要修正,节能器内部应选用更小管径的管子。根据生物质蒸汽锅炉炉膛关键热力参数的修正和优化,提出了锅炉受热面优化布置的建议。对降低锅炉制造成本,提高锅炉运行效率,降低锅炉排放具有显著的意义。
[Abstract]:Thermal calculation, one of the four major calculations of boiler design, is a significant factor affecting boiler safety and performance. Because of the great difference between biomass and coal fuel characteristics, it is inevitable that there will be some deviation in the thermodynamic calculation of industrial boiler. In order to verify the accuracy of the thermal calculation results in the design, It is necessary to judge whether the coefficient used in the calculation formula is appropriate or not based on the test results of energy efficiency of biomass boilers, and to check out more accurate thermodynamic calculation coefficients to perfect the thermodynamic calculation of biomass boilers. The present situation of fuel and energy efficiency test of biomass steam boiler in Guangzhou is systematically investigated. By analyzing a large number of data of biomass steam boiler, such as boiler power, exhaust gas temperature, boiler efficiency, fuel consumption, excess air coefficient, etc. The deviation between the actual test data of biomass steam boiler furnace and the thermodynamic calculation data according to the design method of industrial boiler is found out. It is found that the parameter P has a great influence on the radiation heat transfer of the furnace. The influence of other coefficients on flue gas temperature can be neglected. The modified parameters (0.5608 / 0.2144) are verified by design and test. The design and verification of the convection heating surface is carried out. It is found that the original design flue gas outlet temperature is unreasonable because the temperature of the original furnace outlet is too large than the actual outlet temperature. The original flue gas outlet temperature was revised to 210 鈩，

本文编号：1903883