CN114920433A - 一种抗生素废水处理中产生的化学铁泥资源化利用的方法 - Google Patents
一种抗生素废水处理中产生的化学铁泥资源化利用的方法 Download PDFInfo
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Abstract
本发明涉及固体废物处理技术领域,公开了一种抗生素废水处理中产生的化学铁泥资源化利用的方法,提供利用Fenton铁泥制备干式脱硫用的氧化铁柱状吸附剂的方法。旨在解决Fenton工艺产生大量的无机铁泥,通过添加其它促进剂加工而成的高效气体净化剂,在20℃~100℃之间,对硫化氢有很高的脱除性能,对含硫有机物的VOCs气体有一定的去除效果。
Description
技术领域
本发明涉及固体废物处理技术领域,具体的是一种抗生素废水处理中产生的化学铁泥资源化利用的方法。
背景技术
抗生素废水深度处理工艺通常采用臭氧催化氧化、电催化氧化、Fenton催化氧化工艺,其中Fenton氧化工艺因其处理效果稳定被广泛使用,但是该工艺不可避免的产生大量含铁污泥。目前,化学铁泥处理方式如果直接进入垃圾填埋场,其中的重金属会随着渗透液进行迁徙形成二次污染。而焚烧产生的烟气飞灰仍需进一步处理以防重金属通过大气传播形成二次污染。另一方面,工业废水需要消耗絮凝剂来降低COD和色度。由此,需要提供一种在解决Fenton铁泥处理问题的同时,减少处理废水的成本,实现资源的有效优化利用。
已有研究者开展了相关工作,例如,(1)利用铁粉或电化学的形式将其将其中的三价铁还原成硫酸亚铁溶液,最后通过结晶得到工业硫酸亚铁产品(2)利用芬顿铁泥制备臭氧氧化COD催化剂的方式达到循环利用(3)同时也有利用其中三价铁溶液处理废气中的硫化氢,还原成的二价铁再次应用在Fenton工艺氧化工艺。
以上资源化利用方向较好,但其中工艺较复杂,回用次数较多后会带来有机物的积累。本专利提供一种方法将铁泥制备成合格的干法脱硫吸附剂氧化铁脱硫剂,一般实际生产中用于大型煤厂废气的脱硫处理与沼气脱硫。
发明内容
为解决上述背景技术中提到的不足,本发明的目的在于提供一种抗生素废水处理中产生的化学铁泥资源化利用的方法,提供利用Fenton铁泥制备干式脱硫用的氧化铁柱状吸附剂的方法。旨在解决Fenton工艺产生大量的无机铁泥,通过添加其它促进剂加工而成的高效气体净化剂,在20℃~100℃之间,对硫化氢有很高的脱除性能,对含硫有机物的VOCs气体有一定的去除效果。
本发明的目的可以通过以下技术方案实现:
一种抗生素废水处理中产生的化学铁泥资源化利用的方法,所述方法包括如下步骤:
步骤一、将沉淀池中Fenton铁泥,加入铁屑、CaO、木屑粉,搅拌、混合、反应60min后进入隔膜板框压滤机进行脱水;
步骤二、将挤压成型的板框物料与生化污泥、制孔剂(尿素)混合后进行闪蒸干燥;
步骤三、将闪蒸干燥粉末进行挤压造粒成型柱状;
步骤四、将成型物料进行带式烘干,形成微孔;
步骤五、包装。
进一步的,所述步骤一中的搅拌的容器选择3000L的搪瓷釜。
进一步的,所述步骤二中闪蒸干燥的进风温度为150-160℃,出水温度为70-80℃,闪蒸后为铁红色粉末。
进一步的,所述步骤四中烘干温度为50℃。
本发明的有益效果:
1、本发明提供利用Fenton铁泥制备干式脱硫用的氧化铁柱状吸附剂的方法。旨在解决Fenton工艺产生大量的无机铁泥,通过添加其它促进剂加工而成的高效气体净化剂,在20℃~100℃之间,对硫化氢有很高的脱除性能,对含硫有机物的VOCs气体有一定的去除效果,具有较好的应用前景。
2、本发明制成的氧化铁脱硫剂利用易分解挥发的尿素为致孔物质,使得产品含有大量的空隙,有利于废气吸附过程的气体扩散,通过添加了铁屑、氧化钙与生物污泥等物质,使得氧化铁具有一定的机械强度,使用过程中不容易粉化。
附图说明
下面结合附图对本发明作进一步的说明。
图1是本发明的制备工艺流程图。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
实施例1
一种抗生素废水处理中产生的化学铁泥资源化利用的方法,所述方法包括如下步骤:
步骤一、取沉淀池中Fenton铁泥1000kg,加入重量比为10kg的铁屑、10kg的CaO、30kg的木屑粉,在3000L的搪瓷釜中搅拌、混合、反应60min后进入隔膜板框压滤机进行脱水,经过板框压榨后含水率为60%,颜色为铁红色块状物;
步骤二、将脱水后的板框物料与100kg生化污泥、5kg制孔剂(尿素)混合均匀后进行闪蒸干燥,闪蒸干燥的进风温度为150-160℃,出风温度为70-80℃,闪蒸后为铁红色粉末;
步骤三、将闪蒸干燥粉末通过造粒机进行挤压成型柱状;
步骤四、将成型物料进行带式烘干,形成微孔,包装;
脱硫效果验证:利用玻璃柱进行脱硫剂效果验证,装柱量为100g,进气温度:35℃;空速:500-1500h-1;空塔线速度:0.10-0.30米/秒;压力:微正压100Pa;湿度:大于95%;床层高径比≥3,验证结果如下表所示:
实施例2
一种抗生素废水处理中产生的化学铁泥资源化利用的方法,所述方法包括如下步骤:
步骤一、取沉淀池中Fenton铁泥1200kg,加入重量比为10kg的铁屑、10kg的CaO、30kg的木屑粉,在3000L的搪瓷釜中搅拌、混合、反应60min后进入隔膜板框压滤机进行脱水,经过板框压榨后含水率为60%,颜色为铁红色块状物;
步骤二、将脱水后的板框物料与100kg生化污泥、5kg制孔剂(尿素)混合均匀后进行闪蒸干燥,闪蒸干燥的进风温度为150-160℃,出水温度为70-80℃,闪蒸后为铁红色粉末;
步骤三、将闪蒸干燥粉末通过造粒机进行挤压成型柱状;
步骤四、将成型物料进行带式烘干,形成微孔,包装;
脱硫效果验证:利用玻璃柱进行脱硫剂效果验证,装柱量为200g,进气温度:35℃;空速:500-1500h-1;空塔线速度:0.10-0.30米/秒;压力:微正压100Pa;湿度:大于95%;床层高径比≥3,验证结果如下表所示:
实施例3
一种抗生素废水处理中产生的化学铁泥资源化利用的方法,所述方法包括如下步骤:
步骤一、取沉淀池中Fenton铁泥1500kg,加入重量比为9kg的铁屑、7kg的CaO、28kg的木屑粉,在3000L的搪瓷釜中搅拌、混合、反应60min后进入隔膜板框压滤机进行脱水,经过板框压榨后含水率为60%,颜色为铁红色块状物;
步骤二、将脱水后的板框物料与150kg生化污泥、3kg制孔剂(尿素)混合均匀后进行闪蒸干燥,闪蒸干燥的进风温度为150-160℃,出水温度为70-80℃,闪蒸后为铁红色粉末;
步骤三、将闪蒸干燥粉末通过造粒机进行挤压成型柱状;
步骤四、将成型物料进行带式烘干,形成微孔,包装;
脱硫效果验证:利用玻璃柱进行脱硫剂效果验证,装柱量为90g,进气温度:35℃;空速:500-1500h-1;空塔线速度:0.10-0.30米/秒;压力:微正压100Pa;湿度:大于95%;床层高径比≥3,验证结果如下表所示:
从实施例1、实施例2和实施例3的验证结果可以看出:该氧化铁脱硫剂的硫容约为20%,针对污水站厌氧废气进行吸附,硫化氢去除率达到95%以上,VOCs去除率达到50%以上,具有较好的应用前景。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下,本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。
Claims (4)
1.一种抗生素废水处理中产生的化学铁泥资源化利用的方法,其特征在于,所述方法包括如下步骤:
步骤一、将沉淀池中Fenton铁泥,加入铁屑、CaO、木屑粉,搅拌、混合、反应60min后进入隔膜板框压滤机进行脱水;
步骤二、将挤压成型的板框物料与生化污泥、制孔剂(尿素)混合后进行闪蒸干燥;
步骤三、将闪蒸干燥粉末进行挤压造粒成型柱状;
步骤四、将成型物料进行带式烘干,形成微孔;
步骤五、包装。
2.根据权利要求1所述的一种抗生素废水处理中产生的化学铁泥资源化利用的方法,其特征在于,所述步骤一中的搅拌的容器选择3000L的搪瓷釜。
3.根据权利要求2所述的一种抗生素废水处理中产生的化学铁泥资源化利用的方法,其特征在于,所述步骤二中闪蒸干燥的进风温度为150-160℃,出水温度为70-80℃,闪蒸后为铁红色粉末。
4.根据权利要求2所述的一种抗生素废水处理中产生的化学铁泥资源化利用的方法,其特征在于,所述步骤四中烘干温度为50℃。
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