CN113713589A - 一种高硫氨有机废气的深度处理方法 - Google Patents
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Abstract
本发明公开了属于废气处理、处置技术领域,具体为一种高硫氨有机废气的深度处理方法,其适用范围广,除臭效果和稳定性好,其包括以下步骤:(1)废气收集;(2)废气经过洗涤塔进行化学洗涤;(3)废气经过生物滴滤池去除杂质;(4)废气进入微孔紫外光催化设备降解废气中的有机组分、微生物、细菌;(5)废气经过活性炭吸附残留的成分。
Description
技术领域
本发明公开了属于废气处理、处置技术领域,具体为一种高硫氨有机废气的深度处理方法。
技术背景
高硫氨有机废气即恶臭气体,不仅给人带来嗅觉上的不适,长期生活于恶臭污染的环境中,还会引起厌食、失眠、记忆力下降、心情烦躁等功能性疾病。恶臭气体的来源包括污水和垃圾处理、化工生产、畜禽养殖等,其中以污水处理***和市政污泥处置环节的恶臭污染问题尤为突出,由于多数污水厂没有除臭措施或除臭设施不完善,导致污水厂恶臭污染引起的环境投诉事件时有发生。
目前,高硫氨有机废气的处理处置,传统方式为单工艺:天然植物液除臭技术、吸附法、化学洗涤、生物除臭、离子法、高级氧化法等,即废气处置***中仅设其中一种处理方法;单工艺除臭气方法适用于风量较小、臭气浓度较低、臭气成分单一的工况,且单工艺处理技术容易受污染负荷及组分的变化、非稳定态工况和外界环境温度的影响。
发明内容
为了解决现有单一除臭工艺适用环境有限,稳定性差的问题,本发明提供了一种高硫氨有机废气的深度处理方法,其适用范围广,除臭效果和稳定性好。
其技术方案是这样的:一种高硫氨有机废气的深度处理方法,其特征在于,其包括以下步骤:
(1)废气收集;
(2)废气经过洗涤塔进行化学洗涤;
(3)废气经过生物滴滤池去除杂质;
(4)废气进入微孔紫外光催化设备降解废气中的有机组分、微生物、细菌;
(5)废气经过活性炭吸附残留的成分。
其进一步特征在于,步骤(1)中,废气经空间换气收集,通过空间负压将废气送入后续处理工序中;
步骤(2)中,洗涤塔包括吸收液为氢氧化钠溶液的碱洗涤塔、吸收液为硫酸溶液的酸洗涤塔,氢氧化钠溶液pH≥9.5,硫酸溶液pH≤3,废气先经过碱洗涤塔再经过酸洗涤塔,去除硫醚类废气、酸性气体、胺类废气;
步骤(3)中,生物滴滤池内填料包括松树皮、火山岩、多面空心球、悬浮填料,废气通过生物滴滤池时,被循环液和附着在填料表面的微生物吸附、吸收,从而去除废气中的杂质;
步骤(4)中,微孔紫外光催化设备使用紫外灯进行光催化氧化。
采用本发明后,利用多种处理工艺组合的方式来对废气进行处理,极大的提高了对于高浓度氨气和硫化氢的处理效能和处理负荷,具有应对复杂的废气成分和不稳定的工况的优势,确保高硫氨有机废气经处理后达到比较高的去除率,稳定性强。
附图说明
图1为本发明处理技术路线图。
具体实施方式
见图1所示,一种高硫氨有机废气的深度处理方法,其包括以下步骤:
(1)废气收集:经空间换气收集,通过空间负压将废气送入组合式废气治理***,确保大部分异味不散发到构筑物及密封罩外面空间;
(2)废气经过洗涤塔进行化学洗涤:洗涤塔包括吸收液为氢氧化钠溶液的碱洗涤塔、吸收液为硫酸溶液的酸洗涤塔,氢氧化钠溶液pH≥9.5,硫酸溶液pH≤3,废气先经过碱洗涤塔再经过酸洗涤塔,去除硫醚类废气、酸性气体、胺类废气,其中洗涤塔内填料为φ50的PP多面空心球,塔内水泵流量: 100m3/h,废气在每个塔停留时间≥2.2s;
(3)废气经过生物滴滤池去除杂质:生物滴滤池内填料包括松树皮、火山岩、多面空心球、悬浮填料,废气通过生物滴滤池时,被循环液和附着在填料表面的微生物吸附、吸收,从而去除废气中的的复杂成分,废气停留时间≥25s,水泵流量为65 m3/h;
(4)废气进入微孔紫外光催化设备降解:微孔紫外光催化设备的外观尺寸6.5m×2.4m×2.4m,内部装有216只紫外灯,紫外灯功率75~87w,气体停留时间≥1s,装机功率13kw,废气进入微孔紫外光催化设备,经过高级氧化过程,降解废气中的有机组分、微生物、细菌等;
(5)废气经过活性炭吸附残留的成分:通过活性炭的吸附作用,将经前端废气处置设施处理残留的废臭气吸附在活性炭微孔,通过物理吸附去除,是作为整套废气处理装置的后续处理,气体停留时间≥2s。
本发明的优点:(1)组合式深度废气处理***适合处理废气处理量大、有机物质浓度较高、成分复杂多样、以及工况不稳定的现场情况,确保高硫氨有机废气经本***处理后达到比较高的去除率;(2)与单工艺处理废气工艺相比,组合式深度废气处理***极大的提高了对于高浓度氨气和硫化氢的处理效能和处理负荷,具有应对复杂的废气成分和不稳定的工况的优势;(3)与普通组合工艺处理废气相比,不仅可以应对更为复杂的废气组分,也提高了废气的处理效能和负荷,还能根据工况灵活操作,在不影响处理效果的同时调整工艺适应气体组分的波动,减少运营成本;(4)本方法利用4种废气处理工艺组合处理,针对不同组分的废气进行分段处理,不仅可去除高硫氨有机气体,其他复杂的组分臭气浓度去除率也可以达到91.4%。
下面具体举例说明:
某市政污泥干化处理厂,主要处理市政污泥与蓝藻泥,利用旋转蒸汽污泥干化机处理含水率60%左右干泥,经处理后污泥含水率降至35%左右,干化过程中的产生的有机废气食用本发明的处理方式。
干化有机废气主要成分为氨气、硫化氢及其他臭气组分,废气处理***设计进气风量40000 m3/h,进气组分浓度:氨气133.2mg/ m3、硫化氢35.0mg/ m3、TVOC 43.3mg/ m3。
经***中第一道净化工序化学洗涤法处理后,废气组分浓度:氨气4.60mg/ m3、硫化氢24.7mg/ m3、TVOC 18.2mg/ m3,,去除率分别是96.5%、29.5%、58.0%。
经***中第二道净化工序生物滴滤法处理后,废气组分浓度:氨气2.12mg/ m3、硫化氢4.37mg/ m3、TVOC 7.26mg/ m3,,去除率分别是98.4%、87.5%、83.2%。
经***中第三道净化工序微孔光催化氧化法废气组分浓度:氨气0.6mg/ m3、硫化氢1.84mg/ m3、TVOC 4.2mg/ m3,,去除率分别是99.5%、95.7%、90.3%。
经***中第四道净化工序活性炭吸附法废气组分浓度:氨气0.3mg/ m3、硫化氢1.42mg/ m3、TVOC 3.74mg/ m3,,去除率分别是99.8%、95.9%、91.4%。
干化有机废气经过组合式废气深度治理***,氨气、硫化氢及TVOC的浓度都得到了较大程度的净化。
Claims (5)
1.一种高硫氨有机废气的深度处理方法,其特征在于,其包括以下步骤:
(1)废气收集;
(2)废气经过洗涤塔进行化学洗涤;
(3)废气经过生物滴滤池去除杂质;
(4)废气进入微孔紫外光催化设备降解废气中的有机组分、微生物、细菌;
(5)废气经过活性炭吸附残留的成分。
2.根据权利要求1所述的一种高硫氨有机废气的深度处理方法,其特征在于,步骤(1)中,废气经空间换气收集,通过空间负压将废气送入后续处理工序中。
3.根据权利要求1所述的一种高硫氨有机废气的深度处理方法,其特征在于,步骤(2)中,洗涤塔包括吸收液为氢氧化钠溶液的碱洗涤塔、吸收液为硫酸溶液的酸洗涤塔,氢氧化钠溶液pH≥9.5,硫酸溶液pH≤3,废气先经过碱洗涤塔再经过酸洗涤塔,去除硫醚类废气、酸性气体、胺类废气。
4.根据权利要求1所述的一种高硫氨有机废气的深度处理方法,其特征在于,步骤(3)中,生物滴滤池内填料包括松树皮、火山岩、多面空心球、悬浮填料,废气通过生物滴滤池时,被循环液和附着在填料表面的微生物吸附、吸收,从而去除废气中的杂质。
5.根据权利要求1所述的一种高硫氨有机废气的深度处理方法,其特征在于,步骤(4)中,微孔紫外光催化设备使用紫外灯进行光催化氧化。
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JP2008229484A (ja) * | 2007-03-20 | 2008-10-02 | Kurita Water Ind Ltd | 純水製造装置からの濃縮廃水の処理方法および前記濃縮廃水の処理装置。 |
JP2019104007A (ja) * | 2017-12-14 | 2019-06-27 | 積水化学工業株式会社 | 排水処理用袋 |
CN108554021A (zh) * | 2018-04-19 | 2018-09-21 | 浙江华木环境工程有限公司 | 一种市政污水处理厂产生的恶臭气体的处理工艺 |
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