本文關(guān)鍵詞： 脫硫吸收塔 漿液 起泡 理化性質(zhì)　出處：《安徽理工大學》2017年碩士論文　論文類型：學位論文

【摘要】：論文針對燃煤電廠石灰石-石膏濕法煙氣脫硫漿液起泡、影響脫硫系統(tǒng)的穩(wěn)定和安全運行這一工程實際問題,在系統(tǒng)地分析闡述吸收塔漿液溢流的危害、起泡原理等的基礎(chǔ)上,以馬鞍山當涂縣電廠一、二號脫硫吸收塔為研究目標,選取脫硫吸收塔漿液理化性質(zhì)為研究對象,篩選出吸收塔漿液表面張力、硫酸根離子、以及金屬離子砷、鎘、鉻、鐵、鉛、鎳、金屬離子總量等作為漿液理化性質(zhì)典型代表,較系統(tǒng)地開展了漿液代表性理化指標對脫硫吸收塔漿液起泡的影響。論文分別分析研究了吸收塔漿液表面張力、硫酸根離子、鎘、鉻、鐵、鉛、鎳以及吸收塔漿液金屬離子總量與漿液起泡的相關(guān)關(guān)系,研究結(jié)論如下:(1)一、二號吸收塔中漿液起泡程度隨著表面張力的減小而加劇,但一號塔表現(xiàn)出一定的波動性,漿液表面張力變化相對于消泡劑的添加量增加存在相對的滯后性;二號吸收塔中漿液起泡程度隨著表面張力的減小而加劇,漿液表面張力變化相對于消泡劑的添加量表現(xiàn)出較明顯的一致性。(2)吸收塔中漿液起泡程度隨著漿液中S042-濃度的增大而加劇。(3)一、二號塔漿液加入消泡劑后砷含量的變化趨勢與消泡劑添加量的變化趨勢總體是一致的,宏觀上表現(xiàn)出漿液中砷含量對起泡有影響,但一號塔一致性較明顯,二號塔表現(xiàn)出一定的滯后性。(4)吸收塔漿液的鎘含量與消泡劑的添加量無明顯相關(guān)關(guān)系。(5)加入消泡劑后鉻含量的變化趨勢與消泡劑添加量的變化趨勢總體是相反的,表現(xiàn)出負相關(guān)關(guān)系,加入消泡劑后漿液中鉻的含量均維持在一定范圍內(nèi),一號塔Cr含量在2-9mg/L之間波動,二號塔Cr含量在2-7mg/L之間波動。(6)吸收塔中漿液起泡程度隨著鐵含量的增大而減弱(7)吸收塔中漿液起泡程度的嚴重程度是隨著鎳含量的增大而加劇。(8)吸收塔中漿液起泡程度隨著鉛含量的增大而加劇(9)吸收塔中漿液起泡程度隨著金屬總量的增大而加劇。
[Abstract]:Aiming at the practical problems of limestone gypsum wet flue gas desulphurization slurry bubbling affecting the stability and safe operation of desulfurization system the paper systematically analyzes the harm of slurry overflow in absorption tower. On the basis of foaming principle, taking the No. 1 and No. 2 desulfurization absorption tower of Dangtu County Power Plant in Ma'anshan as the research object, the physicochemical properties of the slurry in the desulfurization and absorption tower were selected as the research object, and the surface tension of the slurry was screened out. Sulphate ions, as well as metal ions arsenic, cadmium, chromium, iron, lead, nickel, metal ions as the typical representative of the physical and chemical properties of the slurry. The effects of the representative physicochemical indexes of the slurry on the bubbling of the slurry in the desulfurization absorber were systematically carried out. The surface tension, sulfate ion, cadmium, chromium, iron and lead of the slurry in the absorber were analyzed and studied in this paper. The relationship between the total amount of metal ions in the size of nickel and the size of the absorber and the foam of the slurry. The conclusions are as follows: 1) 1) and 2) the degree of foaming of the slurry in the absorption tower increases with the decrease of the surface tension. However, the No. 1 tower shows certain volatility, and the change of surface tension of slurry is relative to the increase of defoaming agent content, and there is a relative lag between the change of surface tension and the addition of defoamer. The foaming degree of slurry in the No. 2 absorber increases with the decrease of surface tension. The change of surface tension of slurry shows obvious consistency compared with the amount of defoamer.) the foam degree of slurry in the absorber increases with the increase of S042- concentration in the slurry. The change trend of arsenic content after adding defoamer in No. 2 tower slurry is consistent with the change trend of defoamer content. Macroscopically, arsenic content in slurry has influence on foaming, but the consistency of No. 1 tower is obvious. The content of cadmium in the slurry of the absorber has no obvious correlation with the amount of defoamer. The change trend of chromium content after adding defoamer is opposite to that of defoamer addition. There is a negative correlation between Cr and Cr in the slurry after adding defoamer. The Cr content of No. 1 tower fluctuates between 2 and 9 mg / L. Cr content fluctuates from 2 to 7 mg / L in Tower 2) the foam degree of slurry in the absorption tower weakens with the increase of iron content. The degree of foaming of slurry in absorption tower is aggravated with the increase of nickel content.) the foaming degree of slurry in absorption tower increases with the increase of lead content. The foaming degree of the slurry in the absorption tower increases with the increase of the total metal content.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：X773

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