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2021-08-30
化工污水站组合式除臭设备应用
除臭设备采用化学洗涤、生物除臭塔和光催化氧化设备相结合大大提高了工业污水中所产生的废气去除率,最高可达到95%。通过长期的运行检测发现经除臭过的气体均能达到排放标准。相信在未来组合式除臭设备在化工污水处理厂中会得到广泛的应用与推广。
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化工污水站组合式除臭设备应用
Date﹕2021-08-30|Source:Eclear Environmental

化工污水站组合式除臭设备

臭气收集系统主要收集二期污水站气化调节池、气化来水预处理池、乙二醇调节池、水解酸化池、UASB池、均质池以及SBR缓冲池等池子的产生的恶臭气体,采用“普通碳钢骨架+氟碳纤维膜”以反吊膜的形式进行收集,臭气收集后在风机的作用下,除臭设备采用碱液和次氯酸钠两级化学洗涤消除部分恶臭气体,然后进入生物除臭塔和光催化氧化设备进一步去除有害气。光催化氧化技术主要是利用高能紫外线光束分解空气中的氧分子产生游离氧,游离氧与氧分子产生臭氧。臭氧的氧化作用强,对有机气体和刺激性气味有有清除作用。有机性气体然后到达光催化氧化净化设备后,运用高能紫外线光束及臭氧对有机(异味)气体进行协同分解氧化反应,使有机气体物质其降解转化成低分子化合物、水和二氧化碳,处理好的废气通过30m高的排放塔排入大气中,化学洗涤中产生的废液通过管道排入污水池收集处理。

除臭设备平常运行的设备维护及注意事项

(1)正常运行时,风机要一周切换一次,切换时先停止运行的风机,再确认打开需启动风机阀门及封闭膜门窗。

(2)每周对循环泵切换一次,切换时,先停运运行泵,确认阀门后开关正确后,启动备用泵。

(3)每班从药剂循环泵出口取样分析pH,如果pH小于8.5视为溶液失效,需要更换药剂。操作时,将废液去事故池阀门打开,保持循环泵运行,待泵基本打空后,停运循环泵。

(4)巡检注意事项:①在平常的巡检过程中注意检查各药剂循环泵、风机的电机轴温,振动情况;②注意对各水池封闭膜的变形程度进行观察,防止变形垮塌;③要对系统药剂管路、计量箱、循环泵各个管道进行检查,防止化学品泄漏;④检查洗涤塔的液位,液位低时及时配药,观察药剂的反应程度,及时进行更换药剂。原则上风机不允许停运,如有特殊情况或检修时,可直接进行停止操作,关闭风机进出口阀门即可。待运行稳定后,通知质检中心进行取样分析,查看出口气体工艺指标是否符合要求。

优点和缺点

(1)优点:污水处理站化学除臭系统将是将各池子用反调膜封闭起来。收集的臭气输送至化学喷淋塔,经喷淋化学药剂之后,进入生物除臭塔,最后进入光催化氧化设备,之后经除臭专用风机抽送至排放塔排放,处理后的气体可满足《恶臭污染物排放标准》设备操作简单,管理方便。

(2)缺点:生物除臭塔一次性投资成本比较高,光催化设备在运行过程中产生二次污染需要和好氧生物处理技术结合使用,需消耗一定量的药剂,在运行维护过程中会有危险化学品的接触。

 综上所述,除臭设备采用化学洗涤、生物除臭塔和光催化氧化设备相结合大大高了工业污水中所产生的废气去除率达到95%。通过长期的运行检测发现经除臭过的气体均能达到排放标准。相信在未来组合式除臭设备在化工污水处理厂中会得到广泛的应用与推广。

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