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        臭氧用于污水深度處理必須用高濃度臭氧發生器

        2025-01-08 08:40:37| 發布者:

        臭氧的特征前言一、臭氧在污水處理中的作用:1.降解難降解的大分子及有機物;臭氧可以分解難生物降解的有機物和三致物質,提高污水的可生化性。2.脫色、除味;臭氧去除污水中的色、...

        臭氧的特征

        前言

        一、臭氧在污水處理中的作用:
        1.降解難降解的大分子及有機物;臭氧可以分解難生物降解的有機物和三致物質,提高污水的可生化性。
        2.脫色、除味;臭氧去除污水中的色、嗅、味和酚氯等污染物,增加水中的溶解氧,改善水質。
        3.殺菌;臭氧是優良的氧化劑 ,可以殺滅抗氯性強的病毒和芽孢;
        4.降解COD(降解率多少,要根據水樣做出實驗)、BOD。

        二、臭氧在污水處理中的原理:
        臭氧具有很強的氧化力,目前是已知最強的氧化劑之一。 臭氧在污水處理中的用途是最廣泛的,其原理都是利用的臭氧的強氧化性。臭氧分解后,分解為氧氣,無二次污染,環保有效的氣體。

        三、臭氧應用污水范圍:
        石油污水/廢水
        電鍍廢水
        工業廢水
        醫院污水
        養殖廢水
        造紙污水
        紡織印染污水
        鞭炮廠廢水
        制革\制衣污水
        化工污水
        食品污水
        船舶污水
        生活污水
        【廣州佳環臭氧廠在電鍍廢水,醫院廢水,養殖廢水,紡織印染廢水,鞭炮廠廢水,食品廢水等行業有著豐富的經驗】

         

        四、直接影響臭氧系統化學反應過程的因素包括六大因素:
        1、 影響臭氧濃度和產率的因素:【氣源】
        空氣(富氧空氣或氧氣)的濕度、溫度、流量、壓力、發生器功率等條件都含導致臭氧濃度和產率的變化
        2、 臭氧氧化難降解有機物的反映途經:【應用】
        其一、臭氧通過親核或親電作用直接參加反應。具有直接氧化有機物、反應較慢、有選擇性、有直接氧化產物產生特征。
        其二、臭氧在堿性環境等因素作用下,通過活潑自由基主要是·OH-與污染物反應,具有氧化有機物速度快、無選擇性、間接氧化產物特點。因為OH是臭氧基型鏈反應的引發劑:反映式為:O3+OH-
        3、時間對臭氧氧化反應的影響:【混合】
        實驗表明,通常接觸時間在臭氧濃度≥40mg/L時,為5~10分鐘為宜。時間過短、反應不徹底、給后續工藝帶來負擔,時間過長,如超過15分鐘,反應過頭出現色度加深現象且影響水處理效率。因此,應選擇合適的反應時間。
        4、臭氧投放量對氧化反應的影響:【投加】
        臭氧投放量對污染物去除有著重要的作用,在污染物濃度一定時,通常是臭氧投放量越大,去除效率越高,去除率增加,對于該有機廢水臭氧化最佳調試數據2.8~4.2mg臭氧/mg污染物。因此,處理難降解有機污染、高濃度和大產率都需要,高濃度和小產率顯然不適,低濃度和小產率更不適。
        5、PH值對臭氧氧化反應的影響:【PH】
        (1)臭氧本身氧化能力強弱與PH值有關,臭氧分子中的氧原子本身具有強親電子或質子特征,直接表現出強氧化性能。臭氧在水中的分解速度隨PH值提高而加快。如果PH提高一個單位,臭氧分解大約會快三倍,從而產生更多的·OH,可見堿性條件下對產生強氧化性的·OH多么重要!
        (2)廢水中有機物物理、化學性質與PH值有密切關系。
        (3)臭氧吸收率與PH值有一定的關系,通常認為堿性條件吸收要優于酸性條件。
        (4)PH值在全部臭氧氧化過程中的變化主要表現在中性(PH=7)或堿性(PH>7)條件下,PH值隨氧化過程進行呈下降趨勢,其原因是有機物氧化成小分子有機酸醛類物質。因此,要加強臭氧氧化反應,應不斷進行PH值調節偏堿進行。
        6、臭氧氧化特征的堿性環境形成條件:【環境】
        臭氧氧化的溶液中:臭氧、臭氧+H2O2、臭氧+紫外線、臭氧+H2O2+紫外線幾種方式都可成為堿性化環境,針對不同難降解有機物特點可選擇工藝不同方式。

        五、污水處理中的選型:
        臭氧一般用在污水的深度處理階段,在排放之前的清水池或氧化池投加。其投加濃度取決于污水中的物質組成和要求達到的效果,一般由小試決定。無小試的通用投加濃度在10-15mg/L(氧氣源),由于各臭氧廠家臭氧濃度不同,投加濃度也有差別,如果是空氣源的投加濃度要擴大5-10倍,臭氧濃度越高氧化性越強,效果也越好。廣加環研發室和試驗室建議客戶把水樣寄到本公司,本公司根據水樣做實驗,實驗出來的結果根據結果配臭氧發生器。這樣省成本更省時間,更好的把臭氧應用到污水處理行業中去。
         
        【廣加環在某污水廠的實際案例】
         
        例:某污水廠,1200m3/D ,50T/h,按10mg/L投加,廣州佳環電器科技有限公司臭氧選型為:50*10=500g/h,臭氧機選型為YT-020-500A。
        用增壓泵加水射器工藝投加:
        500克氣量為:7.2m3/h的氧氣。根據水射器氣水比為1:5
        選擇36T/h的增壓泵和36T/h的水射器DN40。

        六、臭氧選型存在誤區:
        1.只關心臭氧產量,忽略臭氧濃度,廣加環高濃度臭氧機濃度為100mg/L
        同樣產量的臭氧機,臭氧出口濃度越高,氧化效果越好。
        2.總投加臭氧量一樣,效果就一樣
        單位體積內的臭氧含量越高,效果也越好
        3.計算臭氧投加量時,忽略混合效率
        只知道臭氧投加量越高越好,往往忽略了臭氧的混合效率,產量再多,濃度再高的臭氧,臭氧混合不到水中,也起不到效果。

        七、污水處理工藝流程及臭氧投加方法:
        污水處理一般分為三個處理階段:1.機械處理;2.生化處理;3.深度處理。臭氧投加在污水處理的深度處理階段,在深度處理階段的消毒池或清水池,投加方法為,從水池中取水通過增壓泵和水射器再回流到水池中,在水池中使臭氧和水充分接觸,延長臭氧和水的接觸時間,把多余的尾氣分離出來,臭氧接觸池最好密封,收集的尾氣通過尾氣口排到室外或接上尾氣毀滅裝置。



        想要了解更多有關臭氧的知識可聯系:18316980324(VX同步)


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        關于我們

        廣州佳環電器科技有限公司是專業從事臭氧系列環保設備的研發、生產及銷售為一體的臭氧發生器生產廠家。公司成立于2007年,經過多年發展,現已成為臭氧行業的領軍企業,以雄厚的技術實力和豐富的臭氧行業經驗為依托,不斷的開發出新的臭氧產品面向市場。

        聯系我們

        • 地址: 廣州市白云區人和鎮東華工業區華隆路2號
        • 電話: 020-36051733 18316980324
        • Email: 2355859223@QQ.com

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