CN104211245B - 一种垃圾渗滤液膜法浓缩液的处理方法 - Google Patents
一种垃圾渗滤液膜法浓缩液的处理方法 Download PDFInfo
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- CN104211245B CN104211245B CN201310217671.9A CN201310217671A CN104211245B CN 104211245 B CN104211245 B CN 104211245B CN 201310217671 A CN201310217671 A CN 201310217671A CN 104211245 B CN104211245 B CN 104211245B
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- 238000003672 processing method Methods 0.000 title claims abstract description 22
- 239000012528 membrane Substances 0.000 claims abstract description 131
- 238000000034 method Methods 0.000 claims abstract description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000000463 material Substances 0.000 claims abstract description 40
- 150000003839 salts Chemical class 0.000 claims abstract description 18
- 239000011780 sodium chloride Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 17
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N calcium cation Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910001424 calcium ion Inorganic materials 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 25
- 239000000126 substance Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 238000004821 distillation Methods 0.000 claims description 14
- 235000012489 doughnuts Nutrition 0.000 claims description 13
- 238000001704 evaporation Methods 0.000 claims description 12
- 239000000835 fiber Substances 0.000 claims description 12
- 230000002209 hydrophobic Effects 0.000 claims description 11
- 238000001471 micro-filtration Methods 0.000 claims description 11
- 230000003647 oxidation Effects 0.000 claims description 9
- 238000007254 oxidation reaction Methods 0.000 claims description 9
- GEHJYWRUCIMESM-UHFFFAOYSA-L Sodium sulfite Chemical compound 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[Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 claims description 8
- 159000000007 calcium salts Chemical class 0.000 claims description 8
- 230000015556 catabolic process Effects 0.000 claims description 8
- 230000004059 degradation Effects 0.000 claims description 8
- 238000006731 degradation reaction Methods 0.000 claims description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Chemical group 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- CBENFWSGALASAD-UHFFFAOYSA-N ozone Chemical compound 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[O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 239000001187 sodium carbonate Substances 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 235000010265 sodium sulphite Nutrition 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 3
- JLVVSXFLKOJNIY-UHFFFAOYSA-N magnesium ion Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 3
- 229920002521 Macromolecule Polymers 0.000 claims description 2
- 239000004698 Polyethylene (PE) Substances 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound 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- 241000209202 Bromus secalinus Species 0.000 description 1
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical compound 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Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
本发明提供一种垃圾渗滤液膜法浓缩液的处理方法,包括如下步骤:将垃圾渗滤液的膜法浓缩液先进行预处理,以去除易沉淀结垢的钙离子,悬浮物,表面张力提高到40mN/m以上,优选提高到65mN/m以上;然后经多效膜蒸馏系统进行浓缩处理,分别获得浓缩液和淡水;所述浓缩液再进行蒸发浓缩结晶,所得固体盐做无害化填埋处理,淡水可回用至垃圾渗滤液整个处理过程。该方法能长期、稳定、有效地处理垃圾渗滤液的膜法浓缩液,无需对现有膜法浓缩原工艺进行改动,不会产生二次污染,并且流程简单,过程能耗低,运行成本低;可以应用于各种规模的垃圾渗滤液的膜法浓缩液处理。
Description
技术领域
[0001 ]本发明涉及垃圾渗滤液处理方法,具体地说,涉及一种针对垃圾渗滤液经过反渗透膜、纳滤膜或其它过滤膜法处理所产生的浓缩液进行处理的方法。
背景技术
[0002]垃圾渗滤液是一种成分复杂、浓度高、难处理的废水。目前主要的处理技术采用生化与膜法相结合的处理方式,生化法可去除垃圾渗滤液中绝大数有机物,有效降低C0D、氨氮含量等;生化后的料液再经过超滤、纳滤或反渗透等膜法分离,进一步过滤剩余的有机物、盐分等物质,使处理后的废水能够达到排放标准。
[0003 ]膜法分离的过程将会产生总体积量20〜30%的浓水(膜法浓缩液),浓水中富集了垃圾渗滤液中大量难生化的有机物、盐分等,其COD和电导率是原生垃圾渗滤液的3〜4倍,甚至5倍;并且随着膜法垃圾渗滤液处理厂运行时间的延长,所产生浓水的量逐渐增大,盐和有机物的浓度也逐渐升高。
[0004]膜法浓缩液的有效处理是整个垃圾渗滤液处理系统不可缺少的重要部分。该膜法浓缩液如果直接排放,将会造成二次污染;目前所采用主要的处理方法有:回灌、蒸发烘干、固化、焚烧等。
[0005]将膜法浓缩液回灌到垃圾填埋场、垃圾储坑或垃圾渗滤液储存池,长期循环会导致渗滤液中盐和有机物的累积,从而导致生化处理系统效果变差,增加膜法系统运行的负担及费用。
[0006]蒸发烘干是将膜法浓缩液中可溶性固体与水分离,对蒸发器抗腐蚀性要求高,并且能耗大,运行成本较高。此外,膜法浓缩液中的部分有机物易挥发,蒸发过程处理不当易引起二次污染。
[0007]固化处理是利用飞灰或污水处理产生的污泥对膜法浓缩液进行固化处理,然后将干化的剩余物运往垃圾填埋场进行无害化填埋。由于固化后的垃圾处理使得处理成本加大,在对膜法浓缩液处理过程中需要结合垃圾场实际情况进行考虑和经济分析。
[0008]将膜法浓缩液直接回喷或者掺油回喷至焚烧炉进行焚烧,是最简单、最经济可靠的方法,不存在其他方法所涉及的占地和可能的二次污染问题;但是该方法能耗很高,且只适用于浓缩液量小的垃圾处理厂。
[0009]因此,目前垃圾渗滤液膜法浓缩液的处理方法,存在着污染转移、运行成本高、能耗高等问题。急需一种简单有效、能耗低、运行成本低的膜法浓缩液的深度处理方法。
发明内容
[0010]为了克服上述垃圾渗滤液膜法浓缩液处理方法的不足,本发明提供一种垃圾渗滤液膜法浓缩液的处理方法,使膜法浓缩液的处理效果稳定可靠,不会对前面的生化和膜法处理步骤造成负面影响,并且降低能耗和运行成本。
[0011]为了实现上述目的,本发明所述的一种垃圾渗滤液膜法浓缩液的处理方法,包括如下步骤:
[0012] I)预处理:将垃圾渗滤液的膜法浓缩液先进行预处理,以去除易沉淀结垢的钙离子,悬浮物,和难降解、具有表面活性、易结垢的有机物等,表面张力提高到40mN/m以上,优选为65mN/m以上;
[0013] 2)多效膜蒸馏:然后经多效膜蒸馏系统进行浓缩处理分别获得浓缩液和淡水;
[0014] 3)浓缩结晶:所述浓缩液再进行浓缩结晶,所得固体盐做无害化填埋处理,淡水可回用至垃圾渗滤液整个处理过程。
[0015]其中,上述膜法浓缩液的处理方法中,所述的膜法浓缩液包括经过反渗透膜、纳滤膜或其它过滤膜法浓缩过程处理后的垃圾渗滤液浓液。
[0016] 进一步地,上述膜法浓缩液的处理方法中,所述的预处理可采用包括选择性脱钙、大孔树脂或活性炭或活性焦吸附、氧化、泡沫分离、微滤、超滤等的一种或几种方式组合,分别去除易沉淀结垢的钙离子,悬浮物,和难降解、具有表面活性、易结垢的有机物等成分,表面张力提高到40mN/m以上,优选提高到6 5mN/m以上。
[0017]进一步地,上述膜法浓缩液的处理方法中,所述的选择性脱钙处理可去除膜法浓缩液中90%以上的钙离子,并将浓缩液中剩余的易饱和的钙盐转化为高溶解度的钙盐,而原浓缩液中的镁离子脱除率小于10%,从而显著节省化学药品的消耗量;所述选择性脱钙处理可采用加入除钙试剂、以钙盐沉淀方式进行,所述除钙试剂为碳酸钠或亚硫酸钠。
[0018]所述大孔树脂或活性炭或活性焦吸附、氧化、泡沫分离等预处理步骤可以去除膜法浓缩液中具有表面活性或对后续多效膜蒸馏装置易造成污染的有机物;所述氧化处理过程可以采用加入含氯的氧化剂、双氧水或者臭氧;当使用臭氧做氧化剂时,可使用膜接触器向垃圾渗滤液的膜法浓缩液中高效提供臭氧。
[0019]所述微滤、超滤等预处理过程可以去除脱钙后膜法浓缩液中的悬浮物、难降解及易结垢的有机物等。表面张力提高到40mN/m以上,优选为65mN/m以上。
[0020]所述微滤膜可采用平均孔径为0.1〜1.Ομπι的微滤膜;所述超滤膜可采用截取分子量为6000〜I OOOOMffCO的超滤膜。
[0021]进一步地,上述膜法浓缩液的处理方法中,所述多效膜蒸馏系统主要由膜蒸馏组件和换热系统组成。
[0022]进一步地,上述膜法浓缩液的处理方法中,所述多效膜蒸馏系统具有在膜蒸馏组件内部或外部热量回收功能,从而提供很高热能利用率,整体系统造水比在3〜20之间,优选在6〜20之间。
[0023]进一步地,上述膜法浓缩液的处理方法中,所述多效膜蒸馏组件可以是以直接接触式膜蒸馏和真空膜蒸馏形式操作的膜蒸馏组件,也可以是以气隙式膜蒸馏形式操作的膜蒸馏组件。
[0024]进一步地,上述膜法浓缩液的处理方法中,所述多效膜蒸馏组件是由中空纤维膜制作,也可以是由平板膜制作。
[0025]进一步地,上述膜法浓缩液处理方法中,所述膜蒸馏组件中使用的中空纤维膜或平板膜是微孔疏水膜或微孔超疏水膜,膜材料为高分子非极性材料,可以是聚丙烯、聚乙烯、聚偏氟乙烯、聚四氟乙烯等的一种或者几种的混合物(形成的膜称之为微孔疏水膜),或与其它比聚四氟乙烯疏水性更强的高分子化合物的混合物或其表面接枝物(形成的膜称之为微孔超疏水膜)。
[0026] 所述中空纤维微孔疏水膜的膜内径均为100〜2000μπι,壁厚均为30〜600μπι,膜壁微孔孔隙率均为30〜75%,微孔径均为0.01〜1.Ομπι,有效长度均为20〜200cm,膜组件中的中空纤维膜装填密度为0.20〜0.70。
[0027] 所述中空纤维微孔超疏水膜的的膜内径均为100〜2000μπι,壁厚均为30〜600μπι,膜壁微孔孔隙率均为30〜85%,孔径均为0.0I〜3.Ομπι,有效长度均为20〜200cm,膜组件中的中空纤维膜装填密度为0.20〜0.70。
[0028]进一步地,上述膜法浓缩液处理方法中,针对不同的膜蒸馏组件以及膜法浓缩液温度的不同,所述多效膜蒸馏系统中换热系统可采用低温换热或高温换热两种方式进行,低温换热部分适用温度5〜45 °C ;高温换热部分适用温度60〜150 °C。
[0029]对于以气隙式膜蒸馏形式操作的膜蒸馏组件,可采用冷进料,外部进一步提供热源,即换热系统为高温换热方式;也可对膜法浓缩液进行先预热处理(温度提高至65〜95°C),采用热进料方式,膜组件回水端进行低温换热,进一步降低膜法浓缩液温度,即换热系统为低温换热方式。
[0030]对于真空膜蒸馏形式操作的膜蒸馏组件,先加热膜法浓缩液至65〜95°C,换热系统为高温换热方式,采用抽真空方式进行蒸馏浓缩,冷侧为低压,通过此种方式处理后的浓缩液温度可达25〜45 °C。
[0031]对于直接接触式膜蒸馏组件,采用先预热膜法浓缩液至65〜100°C,换热系统为高温换热方式,然后低温换热方式(以5〜30°C冷却水进行冷却)进行蒸馏浓缩。
[0032]进一步地,上述膜法浓缩液处理方法中,所述多效膜蒸馏过程的热源可以来自燃煤、燃油或燃气锅炉产生的蒸汽,可以是其它过程的低压乏汽或余热,可以来自垃圾焚烧厂产生的蒸汽,也可以来自电能或太阳能。
[0033]进一步地,上述膜法浓缩液处理方法中,所述多效膜蒸馏系统,可将垃圾渗滤液膜法浓缩液浓缩5〜20倍,处理后浓缩液盐浓度达18〜25%。
[0034]进一步地,上述膜法浓缩液处理方法中,经过所述多效膜蒸馏系统进行浓缩处理后的淡水可以回用到整个垃圾渗滤液处理过程。
[0035]进一步地,上述膜法浓缩液处理方法中,所述浓缩结晶采用蒸发方式,可以是传统露天摊晒过程、温室蒸发过程或者是传统多效蒸发过程,将多效膜蒸馏过程的浓缩液进一步浓缩结晶,得到固体盐,做无害化填埋处理。
[0036]进一步地,上述膜法浓缩液处理方法中,所述浓缩结晶中对浓缩液蒸发浓缩、结晶过程所产生的冷凝液和排气凝结水,可以回流至垃圾渗滤液原始处理系统,或者回灌至垃圾储存坑。
[0037] 进一步地,上述膜法浓缩液处理方法中,所述固体盐是经浓缩结晶过程(也称二次蒸发系统)烘干所得,主要成分是无机盐和少量有机物,其体积相对于膜法浓缩液大大减少,可以进行无害化填埋处理。
[0038]本发明针对垃圾渗滤液经过反渗透膜、纳滤膜或其它过滤膜法浓缩过程处理后的浓缩液进行处理的方法,具有以下优点和积极效果:
[0039] I)本发明采用预处理过程去除了垃圾渗滤液膜法浓缩液中大量易结垢离子、悬浮物以及难降解、具有表面活性的有机物,使料液不易润湿、污染、堵塞用于深度浓缩的膜蒸馏组件,保障了后续多效膜蒸馏系统的稳定运行;
[0040] 2)选择采用多效膜蒸馏系统将垃圾渗滤液的膜法浓缩液继续浓缩至5〜20倍,进一步减小了膜法浓缩液的体积,同时副产淡水可以回用到垃圾渗滤液处理的整个过程;
[0041] 3)本发明多效膜蒸馏系统用于垃圾渗滤液的膜法浓缩液的浓缩过程的造水比高,能耗小,运行成本低;
[0042] 4)本发明采用将浓缩液进一步浓缩,并结晶处理得到固体盐;固体盐体积远远小于膜法浓缩液,无害化填埋处理成本大大降低;
[0043] 5)本发明对垃圾渗滤液的膜法浓缩液的处理效果稳定可靠,不产生二次污染,不对前面的生化和膜法处理步骤造成负面影响,过程简单,能耗低,操作成本低,适用于各种规模的垃圾渗滤液的膜法浓缩液处理。
附图说明
[0044]图1为本发明所述垃圾渗滤液的膜法浓缩液的处理工艺流程图。
具体实施方式
[0045]下面参考附图来说明本发明的实施例。在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其他附图或实施方式中示出的元素和特征相结合。应当注意,为了清楚的目的,附图和说明中省略了与本发明无关的、本领域普通技术人员已知的部件或处理的表示和描述。
[0046]下面结合附图对本发明做进一步描述。
[0047]如图1所示,本发明所述垃圾渗滤液的膜法浓缩液的处理方法,具体步骤如下:
[0048] I)预处理:
[0049]调节垃圾渗滤液的膜法浓缩液的pH值为7.0〜8.5,加入选择性除钙试剂(比如,碳酸钠或亚硫酸钠),使膜法浓缩液中90%以上的钙离子以沉淀物形式去除,并保障浓缩液中镁离子的脱除率低于10%以节省化学药剂,过滤装置将除钙后料液中的悬浮物去除;然后调低滤液pH值为6以下、优选pH=5.0〜6.0,或者通入空气曝气氧化,使溶液中饱和的钙盐转变为高溶解度的钙盐。
[0050]需要说明的是如果垃圾渗滤液中含有表面活性的物质,需要首先通过含氯的氧化剂进行氧化(或臭氧化)、泡沫分离、大孔树脂或活性炭或活性焦吸附等预处理过程将其去除,以提高垃圾渗滤液的表面张力,防止润湿多效膜蒸馏过程使用的微孔疏水膜组件。
[0051 ]此外,对于中老龄垃圾填埋场的渗滤液,膜法浓缩液中含有较多的腐殖质等难生化有机物,在脱钙后过滤悬浮物时可通过选择合适截留分子量的超滤膜(比如微滤过程可采用微孔径为0.1〜1.0ym的微滤膜;所述超滤膜可采用截取分子量为6000〜1000MWC0的超滤膜)进行截留,以保证截留料液中的悬浮物及绝大数腐殖质。
[0052] 预处理后的膜法浓缩液的表面张力提高到40mN/m以上,优选为65mN/m以上。
[0053]预处理过程通过脱钙、氧化、泡沫分离、大孔树脂或活性炭或活性焦吸附、微滤、超滤等工艺去除膜法浓缩液中易结垢的钙离子、悬浮物、部分难降解的有机物等,以防止污染、堵塞膜蒸馏组件,影响后续工艺的进行。
[0054] 2)多效膜蒸馏系统浓缩处理:
[0055]预处理后的膜法浓缩液,进入多效膜蒸馏法浓缩系统,分别得到淡水和浓缩液。
[0056]以基于具有内部显热回收功能的气隙式中空纤维膜蒸馏组件的多效膜蒸馏过程为例,说明多效膜蒸馏的工作原理。气隙式膜蒸馏组件是由中空纤维微孔疏水膜、中空纤维实壁管在膜壳的腔体内相互间隔平行排列而成。经过外部高温换热(冷进料时)或低温换热(热进料时)后形成中空纤维微孔膜内高温、中空纤维实壁管内低温的两股并向逆流的料液,膜法浓缩液中易挥发的组分(主要是水),在膜的高温侧面汽化成水蒸汽,通过膜孔传递到膜的另一侧并冷凝为液体即淡水;由于中空纤维微孔膜是疏水或超疏水的,不易被待处理料液润湿,膜法浓缩液中其它组分则被中空纤维膜阻挡,从而实现深度浓缩的目的。
[0057]本发明可参照201010570625.3,发明名称为一种具有高效内部热回收功能的多效膜蒸馏装置和方法进行浓缩蒸馏。
[0058]多效膜蒸馏系统深度浓缩膜法浓缩液的过程推动力是中空纤维微孔疏水或超疏水膜两侧的蒸汽压差,其具体操作过程中只需消耗少量电力驱动料液流动,运行压力接近常压,耗电量很小,操作费用低。
[0059]多效膜蒸馏过程的热利用率通常用造水比表征。造水比通常定义为消耗一吨蒸汽的冷凝热所能够蒸发分离出的淡水吨数。造水比通常取决于膜的特性参数例如孔隙率、膜壁厚、微孔直径等,取决于膜组件性能,也取决于料液浓度、热源的温度等操作因素。
[0060]多效膜蒸馏系统深度浓缩膜法浓缩液,低温换热可用常温冷却水,高温换热所用热源可是常压蒸汽或者60〜150°C热水或热蒸汽,或者余热、废热等低品位热源,或者是后续工艺多效蒸发的二次蒸汽;并且基于气隙式膜蒸馏组件的多效膜蒸馏过程具有高效内部自换热功能,深度浓缩过程的造水比可达6〜20,能耗很低。
[0061]多效膜蒸馏系统深度浓缩膜法浓缩液,由于料液经过预处理,不含有近饱和组分,可根据水质情况将膜法浓缩再浓缩5〜20倍,深度浓缩液中盐浓度达18〜25%,从而达到深度浓缩的目的。而且,浓缩过程所产淡水可回用到垃圾渗滤液处理的整个过程。
[0062]多效膜蒸馏系统可采用模块化组合方式,并联或串联若干个膜蒸馏组件,可依据料液的待处理量调整设备规模的大小,适用于各种规模的垃圾渗滤液处理。
[0063] 3)浓缩结晶(二次蒸发):
[0064]多效膜蒸馏系统的深度浓缩液进入二次蒸发系统,经过传统露天摊晒过程、温室蒸发过程或者是多效蒸发过程,被进一步浓缩结晶得到固体盐。由于进入二次蒸发系统的料液已是浓度较高的深度浓缩液,浓度高,体积小,再次浓缩、结晶过程的能耗很低,设备投资小;多效蒸发过程副产的冷凝液和排气凝结水,可以回流至垃圾渗滤液原始处理系统,或者回灌至垃圾储存坑。所得固体盐体积相对于原垃圾渗滤液的膜法浓缩液大大减小,无害化填埋处理的成本很低。
[0065]下面通过具体应用实例来对本发明作进一步说明。
[0066] 实施例1:
[0067]某垃圾填埋场渗滤液生化+反渗透膜法处理后,产生约为原垃圾渗滤液体积总量30%的膜法浓缩液,含有大量的难降解有机物、盐分等。调节膜法浓缩液(料液)的pH值为
8.2,加入碳酸钠除钙试剂,将膜法浓缩液中的钙离子以沉淀物形式去除,钙离子的去除率为92.5%;然后经过多级泡沫分离、微滤(平均孔径为0.Ιμπι)、超滤(截取分子量6000MWC0)装置将除钙后料液中的悬浮物、部分难降解的有机物去除;再调节滤液PH值为5.2左右,使溶液中饱和的钙盐转变为高溶解度的钙盐。
[0068] 预处理后的膜法浓缩液,电导率为65ms/cm,近似无色,表面张力68mN/m,⑶Dcr=880mg/L,该料液进入用4个中空纤维气隙式膜蒸馏组件串联建造的多效膜蒸馏系统。
[0069]微孔膜和实壁管均为聚丙烯材料制造,微孔疏水膜的膜内径均为400μπι,壁厚均为140μπι,膜壁微孔孔隙率均为65%,最大孔径为0.3μπι,有效长度均为170cm,膜组件中的中空纤维膜和管的比例为I:1.5,总装填密度为0.51,每个膜组件基于微孔膜内径的有效膜面积为 4.3m2。
[0070]采用冷进料的操作模式,料液进口温度为30°C,利用100°C热水作为热源以间接换热的方式使得每个膜组件的热端进料的料液温度为98°C,浓缩液中水分汽化成水蒸汽在中空纤维膜外侧冷凝成淡水,而浓缩液得到浓缩。串联通过4个膜组件,可以移走约28%的淡水。流出最后一个膜组件的浓缩液经过用自来水间接换热温度降至为30°C后返回料液储槽。该料液经过多次循环浓缩,最终浓缩15倍,其过程平均造水比为8.5。所得淡水的平均电导率为34ys/cm,平均C0D&=68mg/L,,
[0071]多效膜蒸馏系统的最终浓缩液置于浅盘内,在低空气湿度下用太阳光直射加热摊晒,最终得到微黄色固体盐。
[0072] 实施例2:
[0073]某垃圾填埋场渗滤液生化+反渗透膜法处理后,产生约为原垃圾渗滤液体积总量30%的膜法浓缩液,含有大量的难降解有机物、盐分等。调节膜法浓缩液(料液)的pH值为7.8,加入亚硫酸钠除钙试剂,将膜法浓缩液中的钙离子以沉淀物形式去除,钙离子的去除率为95%,除钙后料液经过空气鼓泡氧化、活性焦吸附、微滤(平均孔径为0.Ιμπι)、超滤(截取分子量6000MWC0)装置将除钙后料液中的悬浮物、部分难降解的有机物去除。
[0074] 预处理后的膜法浓缩液,电导率为63ms/cm,近似无色,表面张力为59mN/m,C0DCr=1280mg/L,该料液进入用I个中空纤维气隙式膜蒸馏组件作为多效膜蒸馏装置。
[0075]微孔膜为聚四氟乙烯制造而实壁管为聚丙烯制造,微孔疏水膜的膜内径均为600μm,壁厚均为250μπι,膜壁微孔孔隙率均为75%,最大孔径为1.Ομπι,有效长度均为150cm,膜组件中的中空纤维膜和管的比例为1:1.5,总装填密度为0.48,每个膜组件基于微孔膜内径的有效膜面积为3.4m2。
[0076]采用热进料的操作模式,利用100°C热水作为热源以间接换热的方式使得每个膜组件的热端进料的料液温度为98°C,浓缩液中水分汽化成水蒸汽在中空纤维膜外侧冷凝成淡水,而浓缩液得到浓缩。一次性通过膜组件时,可以移走约7〜8%的淡水。流出膜组件的微孔膜出口的浓缩液经过自来水间接换热温度降至为30°C后返回膜组件的实壁管管程,最后离开膜组件时的料液温度约为88-95°C。该料液经过多次循环浓缩,最终浓缩15倍,其过程平均造水比为9.3。所得淡水的平均电导率为58ys/cm,平均C0D&=87mg/L,,
[0077]多效膜蒸馏系统的最终浓缩液置于浅盘内,在低空气湿度下用太阳光直射加热摊晒,最终得到微黄色固体盐。
[0078]虽然已经详细说明了本发明及其优点,但是应当理解在不超出由所附的权利要求所限定的本发明的精神和范围的情况下可以进行各种改变、替代和变换。而且,本申请的范围不仅限于说明书所描述的过程、设备、手段、方法和步骤的具体实施例。本领域内的普通技术人员从本发明的公开内容将容易理解,根据本发明可以使用执行与在此所述的相应实施例基本相同的功能或者获得与其基本相同的结果的、现有和将来要被开发的过程、设备、手段、方法或者步骤。因此,所附的权利要求旨在在它们的范围内包括这样的过程、设备、手段、方法或者步骤。
Claims (7)
1.一种垃圾渗滤液膜法浓缩液的处理方法,其特征在于,包括如下步骤: 1)预处理:将垃圾渗滤液的膜法浓缩液先进行预处理,所述预处理步骤采用包括选择性脱钙、大孔树脂或活性炭或活性焦吸附、氧化、泡沫分离、微滤、超滤的一种或几种方式组合,以去除易沉淀结垢的90%以上的钙离子,悬浮物,镁离子脱除率小于10%,表面张力提高到65mN/m以上; 2)多效膜蒸馏:然后将所述预处理后的垃圾渗滤液的膜法浓缩液经多效膜蒸馏系统进行浓缩,分别得到浓缩液和淡水;所述多效膜蒸馏系统的造水比在6〜20之间,使垃圾渗滤液的膜法浓缩液浓缩5〜20倍,浓缩液中盐浓度达18〜25% ;所述淡水循环至垃圾渗滤液处理过程;所述的多效膜蒸馏系统主要由膜蒸馏组件和换热系统组成,所述膜蒸馏组件采用中空纤维膜制作,或是由平板膜制作,所述中空纤维膜或平板膜采用微孔疏水膜或微孔超疏水膜,膜材料为高分子非极性材料,所述中空纤维微孔疏水膜的膜内径均为100〜2000μm,壁厚均为30〜600μπι,膜壁微孔孔隙率均为30〜75%,微孔径均为0.01〜1.Ομπι,有效长度均为20〜200cm,膜组件中的中空纤维膜装填密度为0.20〜0.70;所述中空纤维微孔超疏水膜的膜内径均为100〜2000μπι,壁厚均为30〜600μπι,膜壁微孔孔隙率均为30〜85%,微孔径均为0.01〜3.Ομπι,有效长度均为20〜200cm,膜组件中的中空纤维膜装填密度为0.20〜0.7;所述多效膜蒸馏装置的换热系统采用低温换热或高温换热两种方式进行;所述低温换热适用温度5〜45 °C ;所述高温换热适用温度60〜150 °C ; 3)浓缩结晶:所述浓缩液采用传统露天摊晒过程、温室蒸发过程或者是多效蒸发过程,再进行蒸发浓缩结晶,得固体盐。
2.根据权利要求1所述垃圾渗滤液膜法浓缩液的处理方法,其特征在于,所述的膜法浓缩液包括经过反渗透膜、纳滤膜或其它过滤膜法浓缩过程处理后的垃圾渗滤液浓缩液。
3.根据权利要求1所述垃圾渗滤液膜法浓缩液的处理方法,其特征在于,所述膜蒸馏组件采用以直接接触式膜蒸馏和真空膜蒸馏形式操作的膜蒸馏组件,或采用以气隙式膜蒸馏形式操作的膜蒸馏组件。
4.根据权利要求1所述垃圾渗滤液膜法浓缩液的处理方法,其特征在于,所述中空纤维膜或平板膜材料采用聚丙烯、聚乙烯、聚偏氟乙烯、聚四氟乙烯的一种或者几种的混合物,或与其它比聚四氟乙烯疏水性更强的高分子化合物的混合物或其表面接枝物。
5.根据权利要求1所述垃圾渗滤液膜法浓缩液的处理方法,其特征在于,所述选择性脱钙步骤去除所述膜法浓缩液中90%以上的钙离子,并将膜法浓缩液中剩余的易饱和的钙盐转化为高溶解度的钙盐;所述大孔树脂或活性炭或活性焦吸附、氧化、泡沫分离步骤去除膜法浓缩液中具有表面活性或对后续多效膜蒸馏装置易造成污染的有机物;所述微滤、超滤步骤进一步去除脱钙后膜法浓缩液中的悬浮物、难降解及易结垢的有机物,表面张力提高至lj65mN/m以上。
6.根据权利要求1或5所述垃圾渗滤液膜法浓缩液的处理方法,其特征在于,所述选择性脱钙步骤采用加入除钙试剂、以钙盐沉淀方式进行,所述除钙试剂为碳酸钠或亚硫酸钠。
7.根据权利要求1或5所述垃圾渗滤液膜法浓缩液的处理方法,其特征在于,所述氧化处理过程采用加入含氯的氧化剂、双氧水或者臭氧。
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