發(fā)布時(shí)間：2018-04-29 21:28

  本文選題：濕法煙氣脫硫 + 石膏　； 參考：《華北電力大學(xué)》2014年碩士論文

【摘要】：隨著濕法煙氣脫硫系統(tǒng)（WFGD）在燃煤電廠中的普及，其副產(chǎn)品脫硫石膏也成為燃煤電廠的主要廢棄物之一。利用濕法煙氣脫硫系統(tǒng)協(xié)同脫除燃煤電廠煙氣中的汞，同時(shí)避免其副產(chǎn)品中汞的二次釋放具有很大意義。目前國(guó)內(nèi)外對(duì)實(shí)際電廠的濕法煙氣脫硫系統(tǒng)的脫汞性能有一定研究，但對(duì)其副產(chǎn)品的汞釋放特性尚未有系統(tǒng)性的研究。 針對(duì)上述情況，本文對(duì)三個(gè)實(shí)際電廠的濕法煙氣脫硫系統(tǒng)的進(jìn)出口煙氣汞進(jìn)行了采樣，使用了安大略水法（OHM）和吸附管法，分析了該系統(tǒng)對(duì)煙氣總汞、氣態(tài)單質(zhì)汞、氣態(tài)氧化汞的脫除效果，三個(gè)WFGD系統(tǒng)對(duì)煙氣汞均有一定的脫除效果，其中對(duì)氣態(tài)氧化汞有較好的脫除效果，由于脫硫漿液的還原作用，出口的氣態(tài)單質(zhì)汞可能會(huì)大于入口；采集了實(shí)際濕法煙氣脫硫系統(tǒng)中漿液流程各處的樣品并分析其中的汞含量，漿液中的汞主要富集在脫硫石膏中，而脫硫廢水中汞含量較低；對(duì)從現(xiàn)場(chǎng)采集到的脫硫石膏進(jìn)行不同方式的加熱處理，脫硫石膏汞在升溫過程中的主要受熱釋放范圍是100℃~400℃，，且升溫過程中石膏失重與石膏汞釋放沒有同步性，未經(jīng)去離子水處理的石膏相比石膏濾渣在升高到同一溫度時(shí)的汞釋放率更大，通過特定溫度下的汞釋放率確定了各石膏樣品中不同化學(xué)形態(tài)汞的比例；最后計(jì)算了脫硫石膏升溫過程中汞釋放的反應(yīng)動(dòng)力學(xué)參數(shù)。
[Abstract]:With the popularity of wet flue gas desulfurization system (WFGD) in coal-fired power plants, its by-product desulphurization gypsum has become one of the main wastes of coal-fired power plants. It is of great significance to use the wet flue gas desulfurization system to remove mercury from the flue gas of coal-fired power plants and to avoid the secondary release of mercury from its by-products. At present, there is some research on the mercury removal performance of the wet flue gas desulfurization system in power plants at home and abroad, but the mercury release characteristics of its by-products have not been systematically studied. In view of the above situation, the import and export mercury of the wet flue gas desulphurization system in three actual power plants was sampled. The Ontario water method OHM) and the adsorption tube method were used to analyze the effect of the system on the total mercury in the flue gas and the gaseous elemental mercury. The removal effect of gaseous mercury oxide, three WFGD systems have certain removal effect on flue gas mercury, among them, gas mercury oxide has a better removal effect, because of the reduction of desulfurization slurry, the gas state elemental mercury may be larger than the inlet. Samples and mercury contents in the slurry process of the actual wet flue gas desulfurization system are collected and analyzed. The mercury in the slurry is mainly concentrated in the desulfurized gypsum, but the mercury content in the desulfurization wastewater is relatively low. The heat treatment of desulphurized gypsum collected from site shows that the main heat release range of desulphurized gypsum mercury in the process of heating up is 100 鈩

本文編號(hào)：1821621