【摘要】：由于煤氣廢水中含有大量的有機(jī)污染物和高濃度的氨氮,這些污染物很難通過生物降解處理掉,導(dǎo)致出水很難達(dá)到廢水的排放要求和標(biāo)準(zhǔn),需要進(jìn)行深度處理和處置。高級(jí)氧化法在去除污水中難降解有機(jī)物中表現(xiàn)出諸多的優(yōu)勢(shì),是主要方法之一,因此在給水處理中已得到了廣泛的應(yīng)用。本文采用濕式氧化法對(duì)煤氣廢水進(jìn)行深度處理,研究煤氣廢水在濕式氧化反應(yīng)體系中降解的特性和反應(yīng)機(jī)理,為煤氣廢水的高溫、高壓處理提供有效的指導(dǎo)和有益的借鑒�？疾炝藵袷窖趸夹g(shù)處理煤氣廢水中的主要影響參數(shù),如反應(yīng)壓力、反應(yīng)溫度、反應(yīng)停留時(shí)間、氧化劑用量等,在充足的氧化劑用量條件下,濕式氧化技術(shù)在反應(yīng)的過程中表現(xiàn)出了良好的氧化效能和處理能力,得到了最佳污染物去除條件:反應(yīng)溫度為310°C、反應(yīng)壓力為16 MPa、氧化劑用量500 mg/L、反應(yīng)停留時(shí)間為9 min,煤氣廢水的COD去除率達(dá)到了82.7%。采用正交設(shè)計(jì)試驗(yàn)的結(jié)果表明:反應(yīng)溫度是影響煤氣廢水中污染物處理效果的最關(guān)鍵因素。在濕式氧化處理煤氣廢水的效果和能力研究中發(fā)現(xiàn),煤氣廢水經(jīng)過濕式氧化處理后,取出液的可生化性在氧化作用下得到明顯的增強(qiáng)。隨著反應(yīng)體系溫度的不斷提高,煤氣廢水流出液的可生化性已經(jīng)變得越來越好。在反應(yīng)溫度達(dá)到310°C時(shí),煤氣廢水流出液的BOD5/COD值遠(yuǎn)遠(yuǎn)大于0.45,此時(shí)可生化性表現(xiàn)最好。催化濕式氧化技術(shù)能在較低溫度和壓力條件下提高污染物的去除率。論文在研究的過程中發(fā)現(xiàn):堿、過渡金屬離子催化劑在濕式氧化技術(shù)處理煤氣廢水過程中表現(xiàn)出了很好的催化性能和活性。試驗(yàn)結(jié)果表明,少量的KOH、K_2CO_3和KHCO_3的加入有利于煤氣廢水中COD的有效去除,添加KOH比KHCO_3和K_2CO_3的COD去除率更高;KOH的最合適質(zhì)量濃度為400 mg/L,此時(shí)煤氣廢水COD去除率可達(dá)到最大值88.7%。金屬離子催化劑對(duì)濕式氧化煤氣廢水具有較好的催化活性。各種金屬鹽催化劑的催化活性由高到低的順序?yàn)?Fe_2(SO_4)_3NiSO_4MnSO_4。隨著反應(yīng)停留時(shí)間的不斷延長(zhǎng),在Fe~(3+)和Ni2+催化劑的催化作用下,煤氣廢水的COD去除率逐漸的提高。到反應(yīng)停留時(shí)間為9 min時(shí),Fe_2(SO_4)_3和NiSO_4催化下的COD去除率分別為99.5%和97.3%。為了更好的考察各個(gè)影響因素之間的關(guān)系,采用中心組合設(shè)計(jì),實(shí)驗(yàn)結(jié)果表明,反應(yīng)壓力、反應(yīng)溫度、反應(yīng)停留時(shí)間、氧化劑用量等對(duì)COD去除率的影響都比較大,溫度對(duì)COD去除率的影響最大。
[Abstract]:Because gas wastewater contains a large amount of organic pollutants and high concentration of ammonia nitrogen, these pollutants are difficult to be treated by biodegradation, resulting in the effluent is very difficult to meet the discharge requirements and standards, and need to be advanced treatment and disposal. Advanced oxidation is one of the main methods for removing refractory organic matter from wastewater, so it has been widely used in water treatment. This paper deals with the advanced treatment of gas wastewater by wet oxidation method, and studies the degradation characteristics and reaction mechanism of gas wastewater in wet oxidation reaction system, which provides effective guidance and useful reference for the treatment of gas wastewater at high temperature and high pressure. The main influence parameters such as reaction pressure, reaction temperature, reaction residence time, oxidant dosage and so on in the treatment of gas wastewater by wet air oxidation were investigated. Wet air oxidation technology shows good oxidation efficiency and treatment ability in the process of reaction. The optimal removal conditions were obtained as follows: reaction temperature 310 擄C, reaction pressure 16 MPA, oxidant dosage 500 mg / L, reaction residence time 9 min, COD removal rate of gas wastewater reached 82.7%. The results of orthogonal design showed that reaction temperature was the most important factor affecting the treatment effect of pollutants in gas wastewater. In the study of the effect and ability of wet air oxidation treatment of gas wastewater, it is found that the biodegradability of gas wastewater after wet air oxidation treatment is obviously enhanced under the action of oxidation. With the increasing of reaction temperature, the biodegradability of gas wastewater effluent has become better and better. When the reaction temperature reaches 310 擄C, the BOD5/COD value of the gas wastewater effluent is far greater than 0.45, and the biodegradability is the best. Catalytic wet air oxidation can improve the removal rate of pollutants at lower temperature and pressure. In this paper, it is found that alkali and transition metal ion catalysts have good catalytic performance and activity in the treatment of gas wastewater by wet air oxidation. The experimental results show that the addition of a small amount of Kohk K2CO3 and KHCO_3 is beneficial to the effective removal of COD in the gas wastewater. The most suitable mass concentration of Koh is 400 mg / L when the addition of KOH is higher than that of KHCO_3 and K_2CO_3, and the COD removal rate of the gas wastewater can reach the maximum value of 88.7b / L. Metal ion catalyst has good catalytic activity for wet oxidation gas wastewater. The order of catalytic activity of various metal salt catalysts from high to low is: SO_4 (SO_4) 3NiSO4MnSO4s. With the prolongation of residence time, the removal rate of COD from gas wastewater increases gradually under the catalysis of Fe3 and Ni2 catalyst. When the residence time of the reaction is 9 min, the removal rates of COD under the catalysis of SO_4 and NiSO_4 are 99.5% and 97.3%, respectively. In order to better investigate the relationship between various factors, the central combination design is adopted. The experimental results show that the reaction pressure, reaction temperature, reaction residence time and the amount of oxidant have great influence on the removal rate of COD. The effect of temperature on the removal rate of COD is the greatest.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：X784

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張辛忻;;過氧化氫在處理煤氣廢水中的應(yīng)用[J];能源環(huán)境保護(hù);2007年05期

2 張文啟;李永峰;潘健民;劉則華;孫彥剛;;煤氣廢水在不同生化環(huán)境中的處理效果分析及工藝優(yōu)化[J];上海化工;2007年02期

3 方建章,黃少斌;生化法處理煤氣廢水[J];環(huán)境污染與防治;1999年04期

4 李玉瑛;李冰;;煤氣廢水的厭氧消化及對(duì)微量元素的需求[J];五邑大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年04期

5 劉俊新,李偉光,金承基,聶梅生;亞硝酸型硝化——反硝化工藝處理煤氣廢水研究[J];中國(guó)給水排水;1998年01期

6 趙振業(yè),黃君禮,張文兵;二氧化氯在煤氣廢水處理中的應(yīng)用[J];中國(guó)給水排水;2001年07期

7 陳常洲;;外排煤氣廢水的處理工藝[J];化工給排水設(shè)計(jì);1989年02期

8 崔崇威,馬放,張艷敏,李環(huán);哈依煤氣廢水處理改造工藝的技術(shù)討論[J];哈爾濱建筑大學(xué)學(xué)報(bào);2002年06期

9 趙慶良;管鳳偉;;不同混凝劑處理煤氣廢水生物出水的研究[J];黑龍江大學(xué)自然科學(xué)學(xué)報(bào);2010年02期

10 姚立忱;王藝林;劉偉;霍瑩;滕厚開;;臭氧催化氧化技術(shù)深度處理煤氣廢水的實(shí)驗(yàn)研究[J];工業(yè)水處理;2013年05期

相關(guān)會(huì)議論文 前1條

1 張秋民;馮利波;關(guān)s，

本文編號(hào)：2194240