本文選題：燃料特性 + 能效測試��； 參考：《華南理工大學(xué)》2016年碩士論文

【摘要】：鍋爐設(shè)計四大計算之一的熱力計算是影響鍋爐安全和性能的顯著因素。由于生物質(zhì)與煤的燃料特性差異較大,熱力計算時采用《工業(yè)鍋爐設(shè)計計算方法》難免會出現(xiàn)一定的偏差,為了驗證設(shè)計時的熱力計算結(jié)果的準確性,需要依據(jù)生物質(zhì)鍋爐能效測試結(jié)果,來判斷計算公式中所使用的系數(shù)是否恰當,并校核出更準確的熱力計算系數(shù)來完善生物質(zhì)鍋爐的熱力計算。系統(tǒng)調(diào)研了廣州市生物質(zhì)蒸汽鍋爐燃料及能效測試的現(xiàn)狀,通過分析大量的生物質(zhì)蒸汽鍋爐的鍋爐出力、排煙溫度、鍋爐效率、燃料消耗量、過量空氣系數(shù)等數(shù)據(jù),找出了生物質(zhì)蒸汽鍋爐爐膛實際測試數(shù)據(jù)與按照《工業(yè)鍋爐設(shè)計計算方法》設(shè)計的熱力計算數(shù)據(jù)的偏差,經(jīng)過計算發(fā)現(xiàn)參數(shù)?、p對爐膛輻射換熱影響較大,進而影響爐膛出口煙氣溫度,其它系數(shù)對爐膛出口煙氣溫度的影響基本可以忽略。修正參數(shù)?、p值(分別為0.5608、0.2144)并經(jīng)過設(shè)計和測試驗證。進行了對流受熱面的設(shè)計校核,發(fā)現(xiàn)由于原設(shè)計的爐膛出口溫度超過實際出口溫度太大,造成了原設(shè)計的煙氣出口溫度不合理。將原設(shè)計的煙氣出口溫度修訂為210℃后,再次進行計算并校核滿足要求。而節(jié)能器的設(shè)計校核不合格是原設(shè)計的對流煙道出口溫度超過實際出口溫度20℃所造成,證明了節(jié)能器的結(jié)構(gòu)設(shè)計需要修正,節(jié)能器內(nèi)部應(yīng)選用更小管徑的管子。根據(jù)生物質(zhì)蒸汽鍋爐爐膛關(guān)鍵熱力參數(shù)的修正和優(yōu)化,提出了鍋爐受熱面優(yōu)化布置的建議。對降低鍋爐制造成本,提高鍋爐運行效率,降低鍋爐排放具有顯著的意義。
[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，

本文編號：1903883