CN111686682A - 一种深度除氟的材料及系统工艺 - Google Patents
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- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 8
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Abstract
本发明公开一种用于污水深度除氟的材料及其处理系统,属于污水处理技术领域。本发明的污水深度除氟材料,其是以碳酸铝、氢氧化铝、高岭石、氢氧化钠等为原材料,通过550~800℃的高温焙烧,形成不同晶格形态的氧化铝交联的深度除氟处理剂,具体高反应活性。本发明的处理剂所用于的废水处理系统简易、工艺流程操作便捷,吸附时受外界条件如pH、温度条件影响小,出水水质好,可将污水中的氟离子从5.0ppm降至0.2ppm达到饮用水标准,适用于各类含氟污水的深度处理。
Description
技术领域
本发明涉及一种用于废水深度除氟的材料及其处理工艺,属于污水处理技术领域。
背景技术
近年来,由于航空工业、军事化工及半导体制造等行业的飞速发展,其对氟材料的加工应用的需求不断加大。因此,工业高浓度氟废水给自然界和人类健康带来了极大的危害。传统含氟废水的处理工艺采用的处理试剂为石灰,通过絮凝沉淀法去除氟离子,而在实际处理中存在处理效率低、易造成二次污染等问题。
发明内容
针对上述现有技术存在的问题,本发明提供一种用于含氟废水深度处理的材料,解决废水处理后氟浓度不达标,对水体造成危害等问题。
本发明还同时提供了上述处理剂的制备方法及其处理工艺。
为了实现上述目的,本发明采用的一种用于含氟废水深度处理的材料,该材料主要由碳酸铝、氢氧化铝、高岭石、氢氧化钠的原料制成。
优选的,本发明中原料用量:
更有选的,本发明中原料用量如下:
本发明所述的深度除氟的材料的制备方法,采用下述步骤:
将碳酸铝、氢氧化铝、高岭石通过550~800℃进行高温焙烧制得无定形物态;随后加入氢氧化钠溶液,在70~80℃恒温水浴条件下搅拌3~4小时后使之充分溶解,然后于80~85℃低速搅拌(200-400r/min)晶化4-5小时后进行固液分离,取固体用蒸馏水洗涤至pH值为7.5~8.5,干燥即可得到该除氟材料。
本发明上述所述制备方法获得的深度除氟的材料可在含氟废水处理中应用。
优选的,所述系统工艺,可采用下述系统工艺:
所述系统工艺,依次连接格栅单元、沉降单元、溶药单元和深度除氟单元;
所述沉降单元与格栅单元相连;所述溶药单元与沉降单元相连,溶药单元内自动溶解、添加药剂,可对污水进行初步处理;
所述深度除氟单元与所述溶药单元相连;
所述深度除氟单元内投加深度除氟材料,对初步处理后的污水进行深度处理。
经本发明深度处理后的污水,其出水氟浓度降至0.2ppm以下,可达饮用水标准。
本发明利用多种含铝物质,在特殊温度区间煅烧后形成不同晶格形态的氧化铝交联,所得处理药剂具备高反应活性,同时采用的系统工艺简单易行、经济有效,可对含氟废水进行深度处理。本发明所述深度脱氟,对于氟含量比较小的水样尤其敏感,如经过初步处理后的污水中氟含量在5ppm以内时可通过本发明将氟含量降至0.2ppm以下。
本发明具有高效低耗的特点,该除氟剂材料吸附能力较强,吸附时受外界条件如pH条件影响小,出水水质好,同时制备工艺简单可行,原料来源广泛我国高岭土资源丰富,分布广泛,可实现大规模工业化,其产品可广泛用于各项水处理过程中进行进一步深度除氟。同时,该污水处理系统的占地面积小、投资及运行成本低,且操作简单、抗冲击负荷能力强,能够满足污水处理中对前段污染物质深度分离的需求。
附图说明
图1为本发明的深度除氟材料产品颗粒照片。
图2为本发明的含氟废水深度处理工艺流程图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚明了,下面对本发明进行进一步详细说明。但是应该理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限制本发明的范围。
除非另有定义,本文所使用的所有的技术术语和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同,本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的,不是旨在于限制本发明。
一种用于含氟废水深度处理的材料,原材料包括碳酸铝、氢氧化铝、高岭石、氢氧化钠。
实施例1
本发明中原料重量用量如下:
本发明含氟废水深度处理的材料即除氟剂载体合成过程为:先采用600~650℃焙烧碳酸铝、氢氧化铝、高岭石,活化得到无定形物态;然后加入5wt%氢氧化钠溶液,在70~72℃恒温水浴条件下搅拌3小时后使之充分溶解,然后于80~82℃晶化4小时后进行固液分离,取固体用蒸馏水洗涤至pH值为8,干燥即可得到该白色除氟剂载体材料。
实施例2
本发明中原料用量:
本发明含氟废水深度处理的材料即除氟剂载体合成过程为:先将碳酸铝、氢氧化铝、高岭石通过650~680℃进行高温焙烧制得无定形物态;随后加入10wt%氢氧化钠溶液,在75~78℃恒温水浴条件下搅拌3小时后使之充分溶解,然后于80~82℃晶化4小时后进行固液分离,取固体用蒸馏水洗涤至pH值为8,干燥即可得到该白色除氟剂载体材料。
实施例3
本发明中原料用量:
本发明含氟废水深度处理的材料即除氟剂载体合成过程为:先将碳酸铝、氢氧化铝、高岭石通过700~730℃进行高温焙烧制得无定形物态;随后10wt%加入氢氧化钠,在73~75℃恒温水浴条件下搅拌3小时后使之充分溶解,然后于83~85℃晶化4小时后进行固液分离,取固体用蒸馏水洗涤至pH值为8干燥即可得到该白色除氟剂载体材料。
实施例4
如图2所示,采用本发明所获得的除氟剂载体进行污水深度除氟处理,该处理工艺系统包括:
格栅单元;沉降单元,所述沉降单元与所述格栅单元相连;溶药单元,所述溶药单元与所述沉降单元相连,溶药单元内自动溶解、添加药剂,对污水进行初步处理;深度除氟单元,所述深度除氟单元与所述溶药单元相连,所述深度除氟单元内投加深度除氟材料,对初步处理后的污水进行深度处理。该污水处理系统的占地面积小、投资及运行成本低,且操作简单、抗冲击负荷能力强,能够满足污水处理中对前段污染物质深度分离的需求。
该污水处理系统自动控制溶药、加药,有效避免由人操作造成药剂用量过多或过少的情况发生,进一步保障处理效率,也进一步避免了由于工作人员操作失误造成的设备故障。同时业主可通过自动化控制系统对设备进行远程监控、操作,进一步提高设备智能化程度,保障设备安全稳定运行。
取某钢铁酸洗废水,预先经过石灰中和处理,然后再经过本发明除氟材料(投加量2wt%)深度处理后可将出水氟浓度从5.0ppm降至0.2ppm以下,可以完全达到国家标准。
以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换或改进等,均应包含在本发明的保护范围之内。
Claims (6)
2.一种权利要求1所述的深度除氟的材料的制备方法,其特征在于,采用下述步骤:
将碳酸铝、氢氧化铝、高岭石按比例混合,通过550~800℃进行高温焙烧制得无定形物态;随后加入氢氧化钠溶液,在70~80℃的恒温水浴条件下搅拌3~4小时使之充分溶解,然后于80~85℃晶化4~5小时后进行固液分离,所得固体用蒸馏水洗涤至pH值为7.5~8.5,干燥即可。
3.如权利要求2所述制备方法,其特征在于,所述氢氧化钠溶液浓度5wt%-10wt%。
4.权利要求1所述的或者由权利要求2-3所述制备方法获得的深度除氟的材料在含氟废水处理中的应用。
5.如权利要求4所述应用,其特征在于,采用下述污水处理系统工艺:
所述深度除氟材料按0.2~5%的质量浓度投放到初步处理后的污水中,进行深度含氟废水处理。
6.如权利要求4所述应用,其特征在于,经深度处理工业废水后,出水氟浓度降至0.2ppm以下,达到饮用水标准。
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