本文選題：安全工程　切入點：煤自燃　出處：《安全與環(huán)境學報》2017年05期 　論文類型：期刊論文

【摘要】：為了研究煤在低溫階段的自燃活化能及氣體產(chǎn)生規(guī)律,基于耗氧量與煤溫間的計算模型,利用煤氧化動力學測試系統(tǒng),分析了3種不同自燃性煤的低溫氧化表征。結(jié)果表明:1)隨著煤自燃傾向性增強,煤的耗氧量和耗氧速率逐漸增大,且其耗氧速率急劇增大的拐點溫度逐漸升高;2)不同自燃性煤活化能變化規(guī)律存在顯著差異,利用階段耗氧量拐點計算出銅川和大同煤樣溫度分別為203℃、228℃時,活化能快速減小,開始進入自發(fā)氧化階段;晉城煤樣活化能經(jīng)歷先減小后增大的過程,其中過渡溫度段91~135℃時,活化能最小;同時擬合出活化能(E)與指前因子(A)關系式滿足動力補償效應,驗證了機理函數(shù)的合理性;3)依據(jù)復合氣體CO_2/CO、CH_4/C_2H_6、C_2H_4/C_2H_6、C_3H_8/C_2H_6隨溫度的變化趨勢,結(jié)合煤低溫氧化特性,可預測煤樣的氧化進程和煤體溫度。
[Abstract]:In order to study the spontaneous combustion activation energy and gas production law of coal at low temperature, based on the calculation model between oxygen consumption and coal temperature, the coal oxidation kinetics test system was used. The low temperature oxidation characteristics of three kinds of coal with different spontaneous combustion properties were analyzed. The results showed that the oxygen consumption and oxygen consumption rate of coal increased with the increase of spontaneous combustion tendency of coal. Moreover, the inflection point temperature with sharply increasing oxygen consumption rate gradually increased. (2) there were significant differences in the change of activation energy of coal with different spontaneous combustion properties. When the temperature of Tongchuan and Datong coal samples were calculated by using the inflection point of phase oxygen consumption, the temperature of Tongchuan coal and Datong coal was calculated to be 203 鈩，

本文編號：1598284