發(fā)布時間：2019-01-29 01:09

【摘要】：本文采用催化濕式氧化技術,利用攪拌釜式反應器和滴流床反應器對模擬空間站冷凝廢水和衛(wèi)生廢水進行了處理。利用攪拌釜式反應器處理模擬冷凝廢水和衛(wèi)生廢水,研究了溫度、壓力、催化劑投加量和攪拌速度對模擬冷凝廢水和衛(wèi)生廢水TOC去除效果的影響,并對兩種廢水降解的動力學過程及降解機理進行了探討。實驗結果表明,溫度對處理效果的影響最大,在實驗范圍內溫度越高TOC去除率越高;壓力、催化劑投加量及攪拌速度在一定范圍內對處理效果均存在影響。在反應溫度120℃,壓力0.6 MPa,催化劑投加量10 g,攪拌速度200 rpm條件下處理冷凝廢水11 h后,TOC去除率達到96.01%;在溫度120℃,壓力1.2 MPa,催化劑投加量10 g,攪拌速度200 rpm條件下處理衛(wèi)生廢水11 h后,TOC去除率達到98.68%。催化濕式氧化降解模擬冷凝廢水、衛(wèi)生廢水及乙醇過程類似,均符合初始快速反應期-慢速反應期的反應模式,在快速反應期內易降解有機物直接礦化或氧化為難降解的中間產物;在慢速反應期內主要發(fā)生難降解中間產物的降解。宏觀動力學研究表明,快速反應期內TOC降解過程符合一級反應動力學方程。通過對廢水處理過程中樣品TOC、p H、氨氮含量、電導率和乙酸含量的測定,對廢水和典型污染物(乙醇和乙酸)的催化濕式氧化降解機理進行研究。研究結果表明,催化濕式氧化降解冷凝廢水及乙醇過程中,乙酸是主要的降解中間產物;催化濕式氧化降解衛(wèi)生廢水過程中,主要的降解中間產物為乙酸和氨氮。利用滴流床反應器降解模擬冷凝廢水和衛(wèi)生廢水,研究了溫度、廢水流量和氣體流量對處理效果的影響。在140℃、液體流量5 ml/min、空氣流量100 ml/min條件下,利用滴流床反應器處理冷凝廢水時,TOC去除率可達94.5%;在120℃、液體流量10 ml/min,空氣流量為100 ml/min條件下,利用滴流床反應器處理衛(wèi)生廢水時,TOC去除率達92.2%。
[Abstract]:In this paper, catalytic wet oxidation technology was used to treat the condensate wastewater and sanitary wastewater from the space station by using stirred tank reactor and trickle bed reactor. Simulated condensate wastewater and sanitary wastewater were treated by stirred tank reactor. The effects of temperature, pressure, catalyst dosage and stirring speed on the TOC removal efficiency of simulated condensate wastewater and sanitary wastewater were studied. The kinetic process and degradation mechanism of two kinds of wastewater degradation were also discussed. The results show that the temperature has the greatest influence on the treatment effect, the higher the temperature is, the higher the removal rate of TOC is, and the pressure, the amount of catalyst and the stirring speed have influence on the treatment effect in a certain range. Under the conditions of reaction temperature 120 鈩，

本文編號：2417493