WO2019015676A1 - Water purification system - Google Patents

Water purification system Download PDF

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Publication number
WO2019015676A1
WO2019015676A1 PCT/CN2018/096489 CN2018096489W WO2019015676A1 WO 2019015676 A1 WO2019015676 A1 WO 2019015676A1 CN 2018096489 W CN2018096489 W CN 2018096489W WO 2019015676 A1 WO2019015676 A1 WO 2019015676A1
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water
heavy metal
membrane element
membrane
water outlet
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PCT/CN2018/096489
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French (fr)
Chinese (zh)
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沈科
王晨
侯贻直
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艾欧史密斯(中国)环境电器有限公司
艾欧史密斯(中国)热水器有限公司
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Priority to CN201720897360.5U priority Critical patent/CN207243582U/en
Priority to CN201720897360.5 priority
Application filed by 艾欧史密斯(中国)环境电器有限公司, 艾欧史密斯(中国)热水器有限公司 filed Critical 艾欧史密斯(中国)环境电器有限公司
Publication of WO2019015676A1 publication Critical patent/WO2019015676A1/en

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis

Abstract

A water purification system, comprising: a first membrane element (1) having a filter membrane, the first membrane element (1) having a first water inlet (11), a first water outlet (12), and a first waste water outlet (13); and a heavy metal removing unit (2) connected to the first membrane element (1) in series, the heavy metal removing unit (2) having a second water inlet (21) and a second water outlet (22). The first water inlet (11) is connected to the second water outlet (22), or the second water inlet (21) is connected to the first water outlet (12); and the heavy metal removing unit (2) is able to remove predetermined heavy metal ions in inflow water. The water purification system can effectively remove heavy metal ions in inflow water.

Description

净水系统Water purification system
交叉参考相关引用Cross reference related reference
本申请要求2017年7月21日递交的申请号为201720897360.5、发明名称为“净水系统”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。The present application claims the priority of the Japanese Patent Application Serial No. JP-A----------
技术领域Technical field
本申请涉及水质净化领域,尤其涉及一种净水系统。The present application relates to the field of water purification, and in particular to a water purification system.
背景技术Background technique
矿物质(mineral)是构成人体组织和维持正常生理功能必须的各种元素的总称,是人体必须的元素。矿物质是人体无法自身产生、合成的,必须依靠从外界摄取以进行合理的补充。通常,人们可以通过引用含有矿物质的水来补充矿物质,特别是微量元素。Mineral is a general term for various elements that make up human tissue and maintain normal physiological functions. It is an essential element of the human body. Minerals are not produced and synthesized by the human body. They must be taken from the outside world for reasonable supplementation. Usually, people can supplement minerals, especially trace elements, by citing water containing minerals.
在家庭供水中,从自来水厂到官网终端,再到入户之间存在较长的输送距离,水在官网中停留输送的时间较长,在此过程中水中容易混入细菌、铁锈、重金属等有害物质,当然,源头水质的不理想,比如重金属污染等问题也会使得水中的重金属等杂质含量超标。In the domestic water supply, there is a long transport distance from the waterworks to the official website terminal and then to the household. The water stays in the official website for a long time. In this process, the water is easily mixed with bacteria, rust, heavy metals and other harmful. Substance, of course, the source water quality is not ideal, such as heavy metal pollution and other issues will make the content of heavy metals and other impurities in the water exceed the standard.
为清洁水质且保留水中部分矿物质,现有的净水机中通常使用纳滤膜元件对入户水进行净化。但是,纳滤膜元件在使用过程中虽然能保留水中部分矿物质的存在,同时也会使镉、铅、砷等部分重金属离子通过,造成重金属离子进入用水端,降低水质。In order to clean the water and retain some minerals in the water, the existing water purifier usually uses nanofiltration membrane elements to purify the household water. However, although the nanofiltration membrane element can retain the presence of some minerals in the water during use, it also causes some heavy metal ions such as cadmium, lead, and arsenic to pass, causing heavy metal ions to enter the water end and lower the water quality.
发明内容Summary of the invention
鉴于现有技术的不足,本申请提供一种净水系统,包括:In view of the deficiencies of the prior art, the present application provides a water purification system including:
具有过滤膜的第一膜元件;所述第一膜元件具有第一进水口、第一出水口以及第一废水出口;a first membrane element having a filtration membrane; the first membrane element having a first water inlet, a first water outlet, and a first wastewater outlet;
与所述第一膜元件串联的重金属去除单元;所述重金属去除单元具有第二进水口、第二出水口;所述第一进水口连接所述第二出水口,或者,所述第二进水口连接所述第一出水口;所述重金属去除单元能去除来水中的预定重金属离子。a heavy metal removal unit connected in series with the first membrane element; the heavy metal removal unit has a second water inlet and a second water outlet; the first water inlet is connected to the second water outlet, or the second inlet The nozzle is connected to the first water outlet; the heavy metal removal unit is capable of removing predetermined heavy metal ions in the incoming water.
一种净水系统,包括:A water purification system comprising:
具有过滤膜的第一膜元件;所述第一膜元件具有第一进水口、第一出水口以及第一 废水出口;a first membrane element having a filtration membrane; the first membrane element having a first water inlet, a first water outlet, and a first wastewater outlet;
与所述第一膜元件串联的重金属去除单元;所述重金属去除单元包括具有第二进水口和第二出水口的壳体、以及位于壳体内的重金属吸附滤芯;所述第一进水口连接所述第二出水口,或者,所述第二进水口连接所述第一出水口;所述第二进水口的水流入第二出水口时经所述重金属吸附滤芯过滤。a heavy metal removal unit in series with the first membrane element; the heavy metal removal unit includes a housing having a second water inlet and a second water outlet, and a heavy metal adsorption filter cartridge located within the housing; the first water inlet connection The second water outlet is connected to the first water outlet; and the water of the second water inlet is filtered by the heavy metal adsorption filter when flowing into the second water outlet.
种净水系统,包括:A water purification system, including:
具有过滤膜的第一膜元件;所述第一膜元件具有第一进水口、第一出水口以及第一废水出口;a first membrane element having a filtration membrane; the first membrane element having a first water inlet, a first water outlet, and a first wastewater outlet;
与所述第一膜元件串联的重金属去除单元;所述重金属去除单元具有第二进水口、第二出水口;所述第一进水口连接所述第二出水口,或者,所述第二进水口连接所述第一出水口;所述第一膜元件和所述重金属去除单元处理能去除来水中95%以上的重金属。a heavy metal removal unit connected in series with the first membrane element; the heavy metal removal unit has a second water inlet and a second water outlet; the first water inlet is connected to the second water outlet, or the second inlet The nozzle is connected to the first water outlet; the first membrane element and the heavy metal removal unit are processed to remove more than 95% of the heavy metal in the incoming water.
优选的,所述第一膜元件为纳滤膜元件和/或反渗透膜元件。Preferably, the first membrane element is a nanofiltration membrane element and/or a reverse osmosis membrane element.
优选的,所述重金属去除单元位于所述第一膜元件的下游。Preferably, the heavy metal removal unit is located downstream of the first membrane element.
优选的,所述第一膜元件能使净化后的水保留预定含量的矿物质。Preferably, the first membrane element enables the purified water to retain a predetermined amount of minerals.
优选的,所述第一膜元件为纳滤膜元件,或者,所述第一膜元件为纳滤膜和RO膜混卷的侧流膜元件。Preferably, the first membrane element is a nanofiltration membrane element, or the first membrane element is a lateral flow membrane element of a nanofiltration membrane and an RO membrane mixed volume.
优选的,还包括第二膜元件;所述第二膜元件具有第三进水口、第三出水口和第二废水出口;所述第一膜元件过滤后的水比所述第二膜元件过滤后的水保留更多的矿物质。Preferably, the second membrane element further comprises a third water inlet, a third water outlet and a second waste water outlet; the filtered water of the first membrane element is filtered by the second membrane element The water afterwards retains more minerals.
优选的,所述第三进水口连接所述第一废水出口,和/或,所述第三进水口连接所述第一进水口的上游;Preferably, the third water inlet is connected to the first waste water outlet, and/or the third water inlet is connected to the upstream of the first water inlet;
所述第三出水口与所述第一出水口排出的水汇合于所述重金属去除单元的上游或下游;The third water outlet and the water discharged from the first water outlet meet at the upstream or downstream of the heavy metal removal unit;
所述重金属去除单元设置于所述第一膜元件下游,所述第一膜元件过滤后的水流入所述重金属去除单元。The heavy metal removal unit is disposed downstream of the first membrane element, and the filtered water of the first membrane element flows into the heavy metal removal unit.
优选的,所述第一膜元件为纳滤膜元件,所述第二膜元件为反渗透膜元件。Preferably, the first membrane element is a nanofiltration membrane element and the second membrane element is a reverse osmosis membrane element.
优选的,所述重金属去除单元包括具有第二进水口和第二出水口的壳体、以及位于壳体内的重金属吸附滤芯;所述第一出水口连接所述第二进水口,或者,所述第二出水口连接所述第一进水口;所述第二进水口的水流入第二出水口时经所述重金属吸附滤芯过滤。Preferably, the heavy metal removal unit includes a housing having a second water inlet and a second water outlet, and a heavy metal adsorption filter core located inside the housing; the first water outlet is connected to the second water inlet, or The second water outlet is connected to the first water inlet; the water of the second water inlet is filtered by the heavy metal adsorption filter when flowing into the second water outlet.
优选的,所述壳体内设置有与所述第二进水口相通的第一流道、以及与所述第二出 水口相通的第二流道;所述第一流道与所述第二流道之一位于所述重金属吸附滤芯内,另一位于所述重金属吸附滤芯外侧;所述第一流道内的水流入第二流道时经所述重金属吸附滤芯过滤。Preferably, the housing is provided with a first flow passage communicating with the second water inlet and a second flow passage communicating with the second water outlet; the first flow passage and the second flow passage One is located in the heavy metal adsorption filter element, and the other is located outside the heavy metal adsorption filter element; the water in the first flow channel flows through the heavy metal adsorption filter element when flowing into the second flow channel.
优选的,所述壳体内还设有位于所述重金属吸附滤芯下游的微滤膜滤芯;所述重金属吸附滤芯过滤后的水经所述微滤膜滤芯过滤后流入所述第二出水口。Preferably, the housing is further provided with a microfiltration membrane filter element downstream of the heavy metal adsorption filter element; the filtered water of the heavy metal adsorption filter element is filtered through the microfiltration membrane filter element and flows into the second water outlet.
优选的,所述壳体内还设有顺次串联于所述第二流道与所述第二出水口之间的第三流道和第四流道;所述第三流道与所述第四流道之一位于所述微滤膜滤芯内,另一位于所述微滤膜滤芯外;所述第三流道内的水流入所述第四流道时经所述微滤膜滤芯过滤。Preferably, the housing further includes a third flow path and a fourth flow path sequentially connected in series between the second flow path and the second water outlet; the third flow path and the first flow path One of the four flow channels is located inside the microfiltration membrane cartridge, and the other is located outside the microfiltration membrane cartridge; the water in the third flow passage is filtered through the microfiltration membrane cartridge when flowing into the fourth flow passage.
优选的,所述重金属吸附滤芯包括活性炭、胶黏剂、重金属滤料;所述重金属滤料为Metsorb滤料、ATS滤料、微陶重金属滤料、改性沸石中的一种或几种的组合。Preferably, the heavy metal adsorption filter element comprises activated carbon, an adhesive, and a heavy metal filter; the heavy metal filter is one or more of a Metsorb filter, an ATS filter, a micro-ceramic heavy metal filter, and a modified zeolite. combination.
皆有上述技术方案,本申请所提供的净水系统,在原水进入净水系统后顺次经过第一膜元件和重金属去除单元或者顺次经过重金属去除单元和第一膜元件形成纯水,重金属去除单元连接于第一膜元件下游时对第一膜元件的纯水进行重金属离子过滤,重金属去除单元连接于第一膜元件上游时对来水进行重金属离子过滤,进而保证经第一膜元件和重金属去除单元过滤后的纯水中重金属离子得到去除,提升用水端的水质。In the above technical solution, the water purification system provided by the present application sequentially passes through the first membrane element and the heavy metal removal unit or sequentially passes through the heavy metal removal unit and the first membrane element to form pure water, heavy metal after the raw water enters the water purification system. When the removal unit is connected to the downstream of the first membrane element, the pure water of the first membrane element is subjected to heavy metal ion filtration, and the heavy metal removal unit is connected to the upstream of the first membrane element to perform heavy metal ion filtration on the incoming water, thereby ensuring the passage of the first membrane element and The heavy metal ions in the pure water filtered by the heavy metal removal unit are removed to improve the water quality at the water end.
参照后文的说明和附图,详细公开了本申请的特定实施方式,指明了本申请的原理可以被采用的方式。应该理解,本申请的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内,本申请的实施方式包括许多改变、修改和等同。Specific embodiments of the present application are disclosed in detail with reference to the following description and accompanying drawings, in which <RTIgt; It should be understood that the embodiments of the present application are not limited in scope. The embodiments of the present application include many variations, modifications, and equivalents within the scope of the appended claims.
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用,与其它实施方式中的特征相组合,或替代其它实施方式中的特征。Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .
应该强调,术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在,但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。It should be emphasized that the term "comprising" or "comprises" or "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising"
附图说明DRAWINGS
为了更清楚地说明本申请实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present application, and other drawings can be obtained according to the drawings without any creative labor for those skilled in the art.
图1是本申请一种实施方式提供的净水系统水路连接示意图;1 is a schematic diagram of water connection of a water purification system provided by an embodiment of the present application;
图2是图1中的重金属去除单元结构示意图;Figure 2 is a schematic structural view of the heavy metal removal unit of Figure 1;
图3是图1所示净水系统对7吨水净水试验的Cr去除率折线图。Figure 3 is a line diagram of the Cr removal rate for the 7 ton water purification test of the water purification system of Figure 1.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本申请中的技术方案,下面将结合本申请实施例中的附图,对本申请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申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都应当属于本申请保护的范围。The technical solutions in the embodiments of the present application are clearly and completely described in the following, in which the technical solutions in the embodiments of the present application are clearly and completely described. The embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope shall fall within the scope of the present application.
需要说明的是,当元件被称为“设置于”另一个元件,它可以直接在另一个元件上或者也可以存在居中的元件。当一个元件被认为是“连接”另一个元件,它可以是直接连接到另一个元件或者可能同时存在居中元件。本文所使用的术语“垂直的”、“水平的”、“左”、“右”以及类似的表述只是为了说明的目的,并不表示是唯一的实施方式。It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or the element may be present. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. The terms "vertical", "horizontal", "left", "right", and the like, as used herein, are for the purpose of illustration and are not intended to be the only embodiment.
除非另有定义,本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的,不是旨在于限制本申请。本文所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention applies, unless otherwise defined. The terminology used herein is for the purpose of describing particular embodiments, and is not intended to be limiting. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
请参阅图1、图2,为本申请一种实施方式提供的一种净水系统,在该实施方式中,所述净水系统包括:具有过滤膜的第一膜元件1;所述第一膜元件1具有第一进水口11、第一出水口12以及第一废水出口13;与所述第一膜元件1串联的重金属去除单元2;所述重金属去除单元2具有第二进水口21、第二出水口22;所述第一进水口11连接所述第二出水口22,或者,所述第二进水口21连接所述第一出水口12。1 and 2, a water purification system according to an embodiment of the present application, in which the water purification system includes: a first membrane element 1 having a filtration membrane; the first The membrane element 1 has a first water inlet 11, a first water outlet 12 and a first waste water outlet 13; a heavy metal removal unit 2 connected in series with the first membrane element 1; the heavy metal removal unit 2 has a second water inlet 21, The second water outlet 22 is connected to the second water outlet 22, or the second water inlet 21 is connected to the first water outlet 12.
在使用过程中,原水进入净水系统后顺次经过第一膜元件1和重金属去除单元2或者顺次经过重金属去除单元2和第一膜元件1形成纯水。其中,第一膜元件1在过滤过程中会形成废水,重金属去除单元2连接于第一膜元件1下游时对第一膜元件1的纯水进行重金属离子过滤,重金属去除单元2连接于第一膜元件1上游时对来水进行重金属离子过滤,进而保证经第一膜元件1和重金属去除单元2过滤后的纯水中重金属离子得到去除,提升用水端的水质。During use, the raw water enters the water purification system and sequentially passes through the first membrane element 1 and the heavy metal removal unit 2 or sequentially passes through the heavy metal removal unit 2 and the first membrane element 1 to form pure water. Wherein, the first membrane element 1 forms waste water during the filtration process, and the heavy metal removal unit 2 is connected to the downstream of the first membrane element 1 for heavy metal ion filtration of the pure water of the first membrane element 1, and the heavy metal removal unit 2 is connected to the first When the membrane element 1 is upstream, heavy metal ions are filtered on the incoming water, thereby ensuring removal of heavy metal ions in the pure water filtered by the first membrane element 1 and the heavy metal removal unit 2, thereby improving the water quality of the water end.
在一实施方式中,为降低该净水系统产生的纯水中重金属含量,保证用水端的水质健康,所述重金属去除单元2能去除来水中的预定重金属离子。其中,预定重金属离子 可以为第一膜元件1难以去除的,比如:小于第一膜元件1过滤精度的重金属离子,或者,难以被第一膜元件1吸附过滤掉的重金属离子,如此,重金属去除单元2与第一膜元件1相互配合能较为彻底地去除来水(原水)中的重金属离子。预定重金属离子也可以为去除预定几种重金属离子,比如镉、铅、砷、铬、汞中的一种或任意几种。In one embodiment, the heavy metal removal unit 2 can remove predetermined heavy metal ions in the incoming water in order to reduce the heavy metal content in the pure water produced by the water purification system and ensure the water quality of the water end. Wherein, the predetermined heavy metal ions may be difficult to remove by the first membrane element 1, such as heavy metal ions smaller than the filtration precision of the first membrane element 1, or heavy metal ions that are difficult to be adsorbed and filtered by the first membrane element 1, thus, heavy metal removal The unit 2 and the first membrane element 1 cooperate to completely remove heavy metal ions in the incoming water (raw water). The predetermined heavy metal ions may also be one or a plurality of predetermined heavy metal ions such as cadmium, lead, arsenic, chromium, and mercury.
在另一实施方式中,所述第一膜元件1和所述重金属去除单元2处理能去除来水中95%以上的重金属。在该实施方式中,在第一膜元件1与重金属去除单元2的共同作用下来水中95%以上的重金属被去除,保证了用水端的纯水水质,避免用户饮用含有有害重金属的纯水。In another embodiment, the first membrane element 1 and the heavy metal removal unit 2 are treated to remove more than 95% of the heavy metals in the incoming water. In this embodiment, more than 95% of the heavy metal in the water is removed by the cooperation of the first membrane element 1 and the heavy metal removal unit 2, thereby ensuring the pure water quality at the water end, and avoiding the user drinking pure water containing harmful heavy metals.
在该实施方式中,可以理解为该去除率可以为相对于净水系统整体而言,即,净水系统所产的纯水相对于来水(原水)中重金属被去除95%。此时,净水系统的来水经过第一膜元件1及重金属去除单元2后95%以上的重金属被去除。In this embodiment, it can be understood that the removal rate may be relative to the whole water purification system, that is, the pure water produced by the water purification system is removed by 95% with respect to the heavy metal in the incoming water (raw water). At this time, 95% or more of the heavy metal of the water purification system passes through the first membrane element 1 and the heavy metal removal unit 2, and is removed.
当然,考虑到第一膜元件1与重金属去除单元2为串联,该去除率也可以为相对于二者而言,即,第一膜元件1与重金属去除单元2所产生的纯水与进入第一膜元件1与重金属去除单元2的来水相比95%重金属已被去除。进一步地,净水系统的来水经过第一膜元件1及重金属去除单元2后98%以上的重金属被去除。Of course, considering that the first membrane element 1 and the heavy metal removal unit 2 are connected in series, the removal rate may also be relative to both, that is, the pure water generated by the first membrane element 1 and the heavy metal removal unit 2 and enter the first A membrane element 1 has been removed from the 95% heavy metal of the heavy metal removal unit 2 compared to the incoming water. Further, more than 98% of the heavy metal of the purified water of the water purification system passes through the first membrane element 1 and the heavy metal removal unit 2 is removed.
在一未示出的实施方式中,重金属去除单元2可以设置于第一膜元件1的上游,从而对第一膜元件1的输入水进行重金属去除。同时,如图1所示的实施方式中,重金属去除单元2还可以设置于第一膜元件1的下游,从而对第一膜元件1产生纯水进行重金属去除。In an embodiment not shown, the heavy metal removal unit 2 may be disposed upstream of the first membrane element 1 to perform heavy metal removal of the input water of the first membrane element 1. Meanwhile, in the embodiment shown in FIG. 1, the heavy metal removing unit 2 may be disposed downstream of the first membrane element 1 to generate pure water for the first membrane element 1 for heavy metal removal.
重金属去除单元2可以通过吸附的方式去除水中的重金属、也可以通过中和、甚至置换(比如将重金属离子置换为钠离子)的方式将重金属去除。在重金属去除单元2中,重金属去除单元2具备第二进水口21以及第二出水口22,其中,第二出水口22排出的为重金属去除单元2将重金属去除后的纯水,第二出水口22为重金属去除单元2的纯水出口。The heavy metal removal unit 2 can remove heavy metals in water by adsorption, and can also remove heavy metals by neutralization or even replacement (such as replacement of heavy metal ions with sodium ions). In the heavy metal removal unit 2, the heavy metal removal unit 2 is provided with a second water inlet 21 and a second water outlet 22, wherein the second water outlet 22 discharges pure water after the heavy metal removal unit 2 removes heavy metals, and the second water outlet 22 is a pure water outlet of the heavy metal removal unit 2.
在重金属去除单元2过滤过程中,可以产生废水,也可以不产生废水,本实施方式并不作特别的限制。当然,考虑到重金属去除单元2的主要作用为将水中的重金属离子过滤去除,重金属去除单元2优选不具备废水出口,如此设置也可以保证纯水的产量。In the filtration process of the heavy metal removal unit 2, waste water may or may not be generated, and the embodiment is not particularly limited. Of course, considering that the main function of the heavy metal removal unit 2 is to remove the heavy metal ions in the water, the heavy metal removal unit 2 preferably does not have a waste water outlet, and the arrangement can also ensure the production of pure water.
参阅图2所示,本申请一种实施方式提供一种重金属去除单元。在该实施方式中,所述重金属去除单元2包括具有第二进水口21和第二出水口22的壳体20、以及位于壳体20内的重金属吸附滤芯25。所述第一进水口11连接所述第二出水口22,或者,所述 第二进水口21连接所述第一出水口12;所述第二进水口21的水流入第二出水口22时经所述重金属吸附滤芯25过滤。该重金属吸附滤芯25可以通过吸附作用将水中的重金属离子过滤去除。Referring to FIG. 2, an embodiment of the present application provides a heavy metal removal unit. In this embodiment, the heavy metal removal unit 2 includes a housing 20 having a second water inlet 21 and a second water outlet 22, and a heavy metal adsorption cartridge 25 located within the housing 20. The first water inlet 11 is connected to the second water outlet 22, or the second water inlet 21 is connected to the first water outlet 12; when the water of the second water inlet 21 flows into the second water outlet 22 It is filtered through the heavy metal adsorption filter element 25. The heavy metal adsorption filter element 25 can filter and remove heavy metal ions in water by adsorption.
具体的,所述重金属吸附滤芯25包括活性炭、胶黏剂、重金属滤料。该重金属吸附滤芯25可以为烧结而成。其中,所述重金属滤料可以为Metsorb滤料、ATS滤料、微陶重金属滤料、改性沸石中的一种或几种的组合。Specifically, the heavy metal adsorption filter core 25 includes activated carbon, an adhesive, and a heavy metal filter. The heavy metal adsorption filter element 25 can be sintered. The heavy metal filter material may be one or a combination of a Metsorb filter material, an ATS filter material, a micro-ceramic heavy metal filter material, and a modified zeolite.
当然,承接上文描述,本申请中并不排斥重金属去除单元2中采用其他作用(比如中和、置换)去除重金属离子的滤芯。Of course, in the light of the above description, the filter element for removing heavy metal ions by other actions (such as neutralization, replacement) in the heavy metal removal unit 2 is not excluded in the present application.
在该实施方式中,重金属吸附滤芯25在壳体20内将第二进水口21与第二出水口22间隔开,从而,第二进水口21输入进壳体20内的水需要穿过(或经过)重金属吸附滤芯25才能流入第二出水口22。水在经过重金属吸附滤芯25时内部的重金属离子被吸附过滤,使得第二出水口22输出的纯水中重金属含量较低。In this embodiment, the heavy metal adsorption cartridge 25 spaces the second water inlet 21 and the second water outlet 22 in the housing 20, so that the water input into the housing 20 by the second water inlet 21 needs to pass through (or After passing through the heavy metal adsorption filter element 25, it can flow into the second water outlet 22. When the water passes through the heavy metal adsorption filter element 25, the internal heavy metal ions are adsorbed and filtered, so that the heavy water output from the second water outlet 22 is low.
在本实施方式中,壳体20具有收容重金属吸附滤芯25的腔体,重金属吸附滤芯25的形状可以有多种,比如,重金属吸附滤芯25的形状可以与腔体的形状相适应,该腔体的形状可以为圆柱构造,重金属吸附滤芯25整体也可以为圆柱形,当然,腔体也可以为棱柱构造,相应的,重金属吸附滤芯25也可以为棱柱构造。另外,重金属吸附滤芯25也可以不与腔体的形状相匹配,比如,该腔体为圆柱形,而重金属吸附滤芯25为设置于该腔体中间位置的间隔圆板形状等等。In the present embodiment, the housing 20 has a cavity for accommodating the heavy metal adsorption filter core 25. The shape of the heavy metal adsorption filter core 25 can be various. For example, the shape of the heavy metal adsorption filter core 25 can be adapted to the shape of the cavity. The shape of the heavy metal adsorption filter element 25 may also be a cylindrical shape. Of course, the cavity may also be a prismatic structure. Correspondingly, the heavy metal adsorption filter element 25 may also be a prismatic structure. In addition, the heavy metal adsorption filter element 25 may not be matched with the shape of the cavity, for example, the cavity is cylindrical, and the heavy metal adsorption filter element 25 is in the shape of a spacer disk disposed at an intermediate position of the cavity or the like.
优选的,壳体20具有一长度方向,沿该长度方向壳体20具有两端,第二进水口21以及第二出水口22分别位于该两端上,第二进水口21至第二出水口22的方向即为壳体20的长度方向。其中,壳体20内收容重金属吸附滤芯25的腔体的长度方向相同。如图1所示,重金属吸附滤芯25与腔体均为圆柱形构造。Preferably, the housing 20 has a length direction along which the housing 20 has two ends, and the second water inlet 21 and the second water outlet 22 are respectively located at the two ends, and the second water inlet 21 to the second water outlet The direction of 22 is the length direction of the casing 20. The longitudinal direction of the cavity in which the heavy metal adsorption filter element 25 is housed in the casing 20 is the same. As shown in Fig. 1, the heavy metal adsorption filter element 25 and the cavity have a cylindrical configuration.
在该实施方式中,重金属吸附滤芯25可以充满在该腔体内,此时,第二进水口21输入的水由重金属吸附滤芯25一端运动至另一端,然后进入第二出水口22。如此结构下,水经过整个长度的重金属吸附滤芯25,从而能够获得较佳的重金属去除效果。In this embodiment, the heavy metal adsorption filter cartridge 25 can be filled in the cavity. At this time, the water input from the second water inlet port 21 is moved from one end of the heavy metal adsorption filter element 25 to the other end, and then enters the second water outlet port 22. With such a structure, water passes through the entire length of the heavy metal adsorption filter element 25, so that a superior heavy metal removal effect can be obtained.
当然,重金属吸附滤芯25与壳体20之间也可以具有间隙。具体的,如图2所示,所述壳体20内设置有与所述第二进水口21相通的第一流道23、以及与所述第二出水口22相通的第二流道24。所述第一流道23与所述第二流道24之一位于所述重金属吸附滤芯25内,另一位于所述重金属吸附滤芯25外侧。所述第一流道23内的水流入第二流道24时经所述重金属吸附滤芯25过滤。Of course, there may also be a gap between the heavy metal adsorption cartridge 25 and the housing 20. Specifically, as shown in FIG. 2 , the housing 20 is provided with a first flow channel 23 communicating with the second water inlet 21 and a second flow channel 24 communicating with the second water outlet 22 . One of the first flow channel 23 and the second flow channel 24 is located inside the heavy metal adsorption filter core 25, and the other is located outside the heavy metal adsorption filter element 25. When the water in the first flow path 23 flows into the second flow path 24, it is filtered by the heavy metal adsorption filter element 25.
其中,重金属吸附滤芯25为中空的管体构造,大致为同轴设置于壳体20内。第一流道23和第二流道24的长度与重金属吸附滤芯25的长度大致相同,并且,第一流道23与第二流道24沿长度方向的一端封堵,另一端为输入口或输出口。The heavy metal adsorption filter element 25 has a hollow tubular structure and is substantially coaxially disposed in the casing 20 . The lengths of the first flow passage 23 and the second flow passage 24 are substantially the same as the length of the heavy metal adsorption filter cartridge 25, and the first flow passage 23 and the second flow passage 24 are blocked at one end in the longitudinal direction, and the other end is an input port or an output port. .
具体的,第一流道23位于重金属吸附滤芯25外(重金属吸附滤芯25外侧壁与壳体20内壁之间形成的环空),在读者面对图2时,重金属吸附滤芯25与壳体20之间设置有密封圈,从而将第一流道23的上端(靠近第二出水口22的一端)封堵,第一流道23的下端直接与第二进水口21相通。Specifically, the first flow path 23 is located outside the heavy metal adsorption filter element 25 (the annular space formed between the outer side wall of the heavy metal adsorption filter element 25 and the inner wall of the casing 20). When the reader faces FIG. 2, the heavy metal adsorption filter element 25 and the casing 20 are A seal ring is disposed to seal the upper end of the first flow path 23 (one end adjacent to the second water outlet 22), and the lower end of the first flow path 23 is directly communicated with the second water inlet 21.
第二流道24位于重金属吸附滤芯25内,并且,第二流道24的下端(靠近第二进水口21的一端)被封堵,具体的,重金属吸附滤芯25的下端可以设有密封盖体,从而将第二流道24的下端封堵。第二流道24的上端与第二出水口22相通。The second flow path 24 is located in the heavy metal adsorption filter element 25, and the lower end of the second flow path 24 (the end near the second water inlet port 21) is blocked. Specifically, the lower end of the heavy metal adsorption filter element 25 may be provided with a sealing cover. Thereby, the lower end of the second flow path 24 is blocked. The upper end of the second flow path 24 communicates with the second water outlet 22.
如此结构下的重金属去除单元2,在第二进水口21输入水后,水进入第一流道23内并穿过第一流道23与第二流道24之间的重金属吸附滤芯25。此时,重金属吸附滤芯25进水面积以及出水面积较大,可以提升净水效率。In the heavy metal removing unit 2 of such a structure, after the water is input to the second water inlet 21, the water enters the first flow path 23 and passes through the heavy metal adsorption filter element 25 between the first flow path 23 and the second flow path 24. At this time, the water inflow area and the water discharge area of the heavy metal adsorption filter element 25 are large, and the water purification efficiency can be improved.
进一步地,为去除水中的细菌等有害物质,提升系统出水水质,同时,为防止重金属吸附滤芯25中活性炭粉和部分滤料被水流冲走而形成滤料的过渡消耗,基于此目的,所述壳体20内还可以设有位于所述重金属吸附滤芯25下游的微滤膜滤芯28;所述重金属吸附滤芯25过滤后的水经所述微滤膜滤芯28过滤后流入所述第二出水口22。Further, in order to remove harmful substances such as bacteria in the water, the effluent water quality of the system is improved, and at the same time, in order to prevent the activated carbon powder and part of the filter material in the heavy metal adsorption filter element 25 from being washed away by the water flow, a transition consumption of the filter material is formed, for which purpose, A microfiltration membrane cartridge 28 located downstream of the heavy metal adsorption cartridge 25 may be disposed in the casing 20; the filtered water of the heavy metal adsorption cartridge 25 is filtered by the microfiltration membrane cartridge 28 and flows into the second outlet. twenty two.
具体的,如图2所示,所述壳体20内还设有顺次串联于所述第二流道24与所述第二出水口22之间的第三流道26和第四流道27。所述第三流道26与所述第四流道27之一位于所述微滤膜滤芯28内,另一位于所述微滤膜滤芯28外。所述第三流道26内的水流入所述第四流道27时经所述微滤膜滤芯28过滤。Specifically, as shown in FIG. 2, the housing 20 is further provided with a third flow path 26 and a fourth flow path which are sequentially connected in series between the second flow path 24 and the second water outlet 22. 27. One of the third flow path 26 and the fourth flow path 27 is located inside the microfiltration membrane cartridge 28 and the other is located outside the microfiltration membrane cartridge 28. When the water in the third flow path 26 flows into the fourth flow path 27, it is filtered through the microfiltration membrane cartridge 28.
其中,微滤膜滤芯28也可以为圆柱形构造(通常为卷绕形成),第三流道26位于微滤膜滤芯28外侧壁与壳体20内壁之间并与第二流道24相通,形成微滤膜滤芯28的进水流道;第四流道27位于微滤膜滤芯28内部,第四流道27整体将微滤膜贯穿且一端封堵。微滤膜滤芯28的下端可以盖有密封盖体,将第四流道27的下端封堵,第四流道27的上端直接与第二出水口22相通。The microfiltration membrane cartridge 28 may also have a cylindrical configuration (usually formed by winding), and the third flow passage 26 is located between the outer side wall of the microfiltration membrane cartridge 28 and the inner wall of the casing 20 and communicates with the second flow passage 24. The water inlet flow path of the microfiltration membrane cartridge 28 is formed; the fourth flow channel 27 is located inside the microfiltration membrane cartridge 28, and the fourth flow channel 27 integrally penetrates the microfiltration membrane and is blocked at one end. The lower end of the microfiltration membrane cartridge 28 may be covered with a sealing cover to block the lower end of the fourth flow passage 27, and the upper end of the fourth flow passage 27 is directly communicated with the second water outlet 22.
当然,在壳体20内微滤膜滤芯28与重金属吸附滤芯25的设置方式、形状构造并不局限于上述方式,比如二者均可以为上下游排布的过滤圆板形状,水穿过重金属吸附滤芯25的圆板后直接穿过微滤膜滤芯28的圆板等等,在本申请中,只需重金属去除单元2中水由第二进水口21流动至第二出水口22时会顺次经过重金属吸附滤芯25以及微滤 膜滤芯28即可。Of course, the arrangement and shape configuration of the microfiltration membrane cartridge 28 and the heavy metal adsorption cartridge 25 in the casing 20 are not limited to the above manner, for example, both of them may be in the shape of a filter disc arranged upstream and downstream, and the water passes through the heavy metal. After the circular plate of the filter element 25 is adsorbed, it directly passes through the circular plate of the microfiltration membrane cartridge 28, etc., in the present application, only the water in the heavy metal removal unit 2 flows from the second water inlet 21 to the second water outlet 22. The heavy metal adsorption filter 25 and the microfiltration membrane cartridge 28 may be passed through.
在一实施方式中,第一膜元件1通过过滤膜对来水过滤,并形成废水和纯水,相应的,第一膜元件1形成的废水经第一废水出口13排出,形成的纯水经第一出水口12排出。通常,为保证纯水的制水量,第一废水出口13可以连接有废水比例器(也称为废水比),通过该废水比例器调整纯水制取的比例。在该实施方式中,所述第一膜元件1可以为纳滤膜元件和/或反渗透膜元件。In one embodiment, the first membrane element 1 filters the water through the filter membrane, and forms waste water and pure water. Accordingly, the wastewater formed by the first membrane element 1 is discharged through the first wastewater outlet 13 to form pure water. The first water outlet 12 is discharged. Generally, in order to ensure the water production amount of the pure water, the first wastewater outlet 13 may be connected with a wastewater proportionalizer (also referred to as a wastewater ratio), and the proportion of the pure water prepared by the wastewater proportionalizer is adjusted. In this embodiment, the first membrane element 1 may be a nanofiltration membrane element and/or a reverse osmosis membrane element.
为补充人体中的矿物质,保障人体健康,所述第一膜元件1能使净化后的水保留预定含量的矿物质。具体的,该净水系统所产纯水中矿物质保留率可以在5%-15%。因此,在将重金属有效去除的同时,保障水中存留的矿物质不被去除,从而最大程度地有利于提升用水质量。In order to supplement the minerals in the human body and protect human health, the first membrane element 1 enables the purified water to retain a predetermined amount of minerals. Specifically, the mineral water retention rate of the pure water produced by the water purification system may be 5%-15%. Therefore, while the heavy metals are effectively removed, the minerals remaining in the water are not removed, thereby maximizing the improvement of the water quality.
具体的,所述第一膜元件1可以为纳滤膜元件,或者,所述第一膜元件1为纳滤膜和RO膜(反渗透膜)混卷的侧流膜元件。具体的,在该侧流膜元件中,纳滤膜与RO膜可以卷绕成一个圆柱体,其中,纳滤膜与RO膜可以相间隔分布,即一层纳滤膜两侧为RO膜,一层RO膜两侧为纳滤膜;或者,纳滤膜与RO膜均卷绕为一套筒,一个套筒套设于另一套筒外等等。在该侧流膜元件中,纳滤膜与RO膜可以为串联也可以为并联。Specifically, the first membrane element 1 may be a nanofiltration membrane element, or the first membrane element 1 is a lateral flow membrane element of a nanofiltration membrane and an RO membrane (reverse osmosis membrane). Specifically, in the lateral flow membrane element, the nanofiltration membrane and the RO membrane can be wound into a cylinder, wherein the nanofiltration membrane and the RO membrane can be spaced apart, that is, a layer of the nanofiltration membrane is an RO membrane on both sides. A layer of RO membrane is a nanofiltration membrane on both sides; or, the nanofiltration membrane and the RO membrane are wound into one sleeve, one sleeve is sleeved outside the other sleeve, and the like. In the lateral flow membrane element, the nanofiltration membrane and the RO membrane may be in series or in parallel.
在并联时,纳滤膜与RO膜的进水侧均通入来水,出水侧同时通入第一出水口12,废水侧同时通入第一废水出口13。在串联时,纳滤膜与RO膜之一在上游,另一在下游;在下游的膜的进水侧可以与在上游的膜的纯水侧相通,也可以与上游的膜的废水侧相通,优选的,在下游的膜的进水侧与在上游的膜的废水侧相通,从而提升纯水的制水比例。In parallel, both the nanofiltration membrane and the inlet side of the RO membrane are supplied with water, and the outlet side is simultaneously introduced into the first outlet 12, and the wastewater side is simultaneously introduced into the first wastewater outlet 13. In series, the nanofiltration membrane is upstream of one of the RO membranes and the other is downstream; the inlet side of the downstream membrane may be in communication with the pure water side of the upstream membrane or may be in communication with the wastewater side of the upstream membrane. Preferably, the water inlet side of the downstream membrane communicates with the wastewater side of the upstream membrane to increase the water production ratio of the pure water.
承接上文描述,重金属去除单元2位于第一膜元件1上游,也可以位于第一膜元件1下游。在重金属去除单元2位于第一膜元件1上游时,相对于第一膜元件1而言重金属去除单元2对来水进行预处理,从而进入第一膜元件1的水中大部分重金属离子已被重金属去除单元2过滤去除,降低了第一膜元件1的重金属吸附压力,延长第一膜元件1的使用寿命。Following the above description, the heavy metal removal unit 2 is located upstream of the first membrane element 1 and may also be located downstream of the first membrane element 1. When the heavy metal removal unit 2 is located upstream of the first membrane element 1, the heavy metal removal unit 2 pretreats the incoming water with respect to the first membrane element 1, so that most of the heavy metal ions entering the water of the first membrane element 1 have been heavily metal The removal unit 2 removes the filtration, reduces the heavy metal adsorption pressure of the first membrane element 1, and prolongs the service life of the first membrane element 1.
作为优选的实施方式,所述重金属去除单元2可以位于所述第一膜元件1的下游。此时,重金属去除单元2对第一膜元件1过滤后的水进行重金属去除。第一膜元件1为通过过滤膜将来水过滤,依靠过滤膜的作用,第一膜元件1可以较为稳定地去除对来水中绝大部分重金属离子。从而,可以有效降低在其下游的重金属去除单元2的吸附压力。在重金属去除单元2采用上述吸附型的滤料时,重金属去除单元2设置在第一膜元件1 下游也避免了滤料消耗过快,延长重金属去除单元2的使用寿命。As a preferred embodiment, the heavy metal removal unit 2 may be located downstream of the first membrane element 1. At this time, the heavy metal removing unit 2 performs heavy metal removal on the water filtered by the first membrane element 1. The first membrane element 1 is filtered by a filter membrane in the future, and the first membrane element 1 can relatively stably remove most of the heavy metal ions in the water by the action of the filtration membrane. Thereby, the adsorption pressure of the heavy metal removal unit 2 downstream thereof can be effectively reduced. When the heavy metal removal unit 2 employs the above-described adsorption type filter material, the heavy metal removal unit 2 is disposed downstream of the first membrane element 1 to also avoid excessive consumption of the filter material, prolonging the service life of the heavy metal removal unit 2.
同时,发明人研究发现:水中重金属种类较多会存在竞争吸附的现象,此时,过滤元件因竞争吸附作用对某一种重金属离子(比如Pb离子)优先吸附,而造成其他重金属的吸附去除效果不佳。重金属去除单元2设置于第一膜元件1的下游也可以有效解决该问题。通过第一膜元件1将更容易被重金属去除单元2吸附的重金属离子去除,改善因Pb等重金属离子的竞争吸附而造成的其他重金属离子吸附效果低、寿命短的问题。At the same time, the inventors have found that there are many types of heavy metals in the water, and there is a phenomenon of competitive adsorption. At this time, the filter element preferentially adsorbs a certain heavy metal ion (such as Pb ion) due to competitive adsorption, resulting in adsorption and removal of other heavy metals. Not good. The arrangement of the heavy metal removal unit 2 downstream of the first membrane element 1 can also effectively solve this problem. The heavy metal ions adsorbed by the heavy metal removing unit 2 are more easily removed by the first membrane element 1, and the problem that the adsorption of other heavy metal ions due to competitive adsorption of heavy metal ions such as Pb is low and the life is short is improved.
在图1所示的实施方式中,该净水系统还可以包括第二膜元件3;所述第二膜元件3具有第三进水口31、第三出水口32和第二废水出口33;所述第一膜元件1过滤后的水比所述第二膜元件3过滤后的水保留更多的矿物质。In the embodiment shown in FIG. 1, the water purification system may further include a second membrane element 3; the second membrane element 3 has a third water inlet 31, a third water outlet 32, and a second wastewater outlet 33; The filtered water of the first membrane element 1 retains more minerals than the filtered water of the second membrane element 3.
在该实施方式中,第一膜元件1与第二膜元件3制取的纯水不同,第一膜元件1产生的纯水比第二膜元件3中含有更多的矿物质,从而,在具有第一膜元件1与第二膜元件3时可以通过调节二者所产纯水的混合比例可以达到调节出水水质的问题。In this embodiment, the first membrane element 1 is different from the pure water produced by the second membrane element 3, the pure water produced by the first membrane element 1 contains more minerals than the second membrane element 3, and thus, When the first membrane element 1 and the second membrane element 3 are provided, the problem of adjusting the quality of the effluent water can be achieved by adjusting the mixing ratio of the pure water produced by the two membrane elements 1.
在该实施方式中,第二膜元件3相较于第一膜元件1的过滤精度更高。优选的,所述第一膜元件1为纳滤膜元件,所述第二膜元件3为反渗透膜元件。其中,反渗透膜元件对于来水中含有的物质去除的比较彻底,所制取的纯水中不仅有害物质去除十分彻底,同时,矿物质等元素的含量也较低。而纳滤膜元件相较于反渗透膜元件,所制的纯水中保留更多地矿物质,将二者所制纯水混合从而既能拥有高水质又能保证其中富含一定的矿物质。In this embodiment, the second membrane element 3 has a higher filtration accuracy than the first membrane element 1. Preferably, the first membrane element 1 is a nanofiltration membrane element and the second membrane element 3 is a reverse osmosis membrane element. Among them, the reverse osmosis membrane element is relatively thorough for the removal of substances contained in the water, and the pure water produced is not only completely removed by harmful substances, but also the content of minerals and the like is low. Compared with the reverse osmosis membrane element, the nanofiltration membrane element retains more minerals in the pure water produced, and the pure water prepared by the two is mixed to achieve high water quality and ensure a certain mineral content. .
具体的,第一膜元件1与第二膜元件3可以并联也可以串联。当然,不管二者并联或串联,第一膜元件1与第二膜元件3的第一出水口12和第三出水口32流出的纯水相汇合,因此,二者是否串联或并联取决于二者的进水口连接的为原水管道,还是位于上游膜元件的废水出口。Specifically, the first membrane element 1 and the second membrane element 3 may be connected in parallel or in series. Of course, regardless of whether the two are connected in parallel or in series, the first membrane element 1 merges with the pure water flowing out of the first water outlet 12 and the third water outlet 32 of the second membrane element 3, so whether the two are connected in series or in parallel depends on two The water inlet of the person is connected to the raw water pipe or the waste water outlet of the upstream membrane element.
相应的,在第一膜元件1与第二膜元件3串联时,所述第三进水口31连接所述第一废水出口13。第二膜元件3位于第一膜元件1的下游,且对第一膜元件1产生的废水进行二次过滤形成纯水,不仅能够提高产水率,同时也能够提升水质。在第一膜元件1与第二膜元件3并联时,所述第三进水口31连接所述第一进水口11的上游。此时,第三进水口31与第一进水口11同时输入原水,并对各自输入的原水进行过滤形成纯水。Correspondingly, when the first membrane element 1 is connected in series with the second membrane element 3, the third water inlet 31 is connected to the first waste water outlet 13. The second membrane element 3 is located downstream of the first membrane element 1, and secondary filtration of the wastewater generated by the first membrane element 1 to form pure water can not only improve the water production rate, but also improve the water quality. When the first membrane element 1 is connected in parallel with the second membrane element 3, the third water inlet 31 is connected upstream of the first water inlet 11. At this time, the third water inlet 31 and the first water inlet 11 simultaneously input raw water, and the raw water input thereto is filtered to form pure water.
当然,第三进水口31也可以既与第一废水出口13相连接,同时连接第一进水口11的上游,即,第三进水口31同时输入原水以及第一膜元件1的废水,保障纯水产量。Of course, the third water inlet 31 can also be connected to the first waste water outlet 13 while being connected upstream of the first water inlet 11 , that is, the third water inlet 31 simultaneously inputs the raw water and the wastewater of the first membrane element 1 to ensure purity. Water production.
其中,所述第三出水口32与所述第一出水口12排出的水汇合于所述重金属去除单 元2的上游或下游。所述重金属去除单元2设置于所述第一膜元件1下游,所述第一膜元件1过滤后的水流入所述重金属去除单元2。The third water outlet 32 and the water discharged from the first water outlet 12 meet upstream or downstream of the heavy metal removal unit 2. The heavy metal removal unit 2 is disposed downstream of the first membrane element 1, and the filtered water of the first membrane element 1 flows into the heavy metal removal unit 2.
在该实施方式中,所述第三出水口32与所述第一出水口12排出的水汇合于所述重金属去除单元2的上游时,重金属去除单元2可以同时对第一膜元件1与第二膜元件3所产纯水过滤,重金属去除单元2位于净水系统的干路上。所述第三出水口32与所述第一出水口12排出的水汇合于所述重金属去除单元2的下游时,重金属去除单元2仅对第一膜元件1所产纯水过滤,重金属去除单元2位于净水系统的第一膜元件1所在支路上。In this embodiment, when the third water outlet 32 and the water discharged from the first water outlet 12 converge upstream of the heavy metal removal unit 2, the heavy metal removal unit 2 can simultaneously apply the first membrane element 1 and the first The pure water filtered by the two membrane elements 3 is filtered, and the heavy metal removal unit 2 is located on the dry road of the water purification system. When the third water outlet 32 and the water discharged from the first water outlet 12 meet the downstream of the heavy metal removal unit 2, the heavy metal removal unit 2 filters only the pure water produced by the first membrane element 1, and the heavy metal removal unit 2 Located on the branch of the first membrane element 1 of the water purification system.
下面采用本申请中图1所示净水系统的实施例,在该实施例中,反渗透膜元件与纳滤膜元件串联,重金属去除单元位于二者的下游。采用该实施例与没有重金属去除单元的对比例(图1所示水路相比仅去除重金属去除单元)进行制水试验,获得如下表1所示重金属去除效果对比表格:An embodiment of the water purification system of Figure 1 of the present application is used below, in which the reverse osmosis membrane element is in series with the nanofiltration membrane element and the heavy metal removal unit is located downstream of the two. Using this example, a water test was performed with a comparative example without a heavy metal removal unit (only the heavy metal removal unit was removed as shown in Fig. 1), and a comparison table of heavy metal removal effects as shown in Table 1 below was obtained:
表1重金属去除效果对比Table 1 Comparison of heavy metal removal effects
  Cd/%Cd/% Cr/%Cr/% Pb/%Pb/% As/%As/%
对比例Comparative example 99.8399.83 92.5292.52 99.8799.87 85.9185.91
实施例Example 99.9899.98 97.9697.96 99.9399.93 97.8597.85
通过上表可以看出,具有重金属去除单元的实施例中对于各类重金属离子均达到了较高的水平,能够十分有效地保障净水后的水质。It can be seen from the above table that the embodiment with the heavy metal removal unit achieves a high level for all kinds of heavy metal ions, and can effectively guarantee the water quality after the purified water.
同时,利用对比例进行制水,并对制取纯水中的各类重金属离子进行测试发现其测试结果验证了水中重金属会存在竞争吸附。测试结果如表2所示:At the same time, using the comparative example to produce water, and testing various heavy metal ions in pure water, the test results verify that there is competitive adsorption of heavy metals in water. The test results are shown in Table 2:
表2对比例测试重金属吸附差异性Table 2 Comparative test heavy metal adsorption difference
Figure PCTCN2018096489-appb-000001
Figure PCTCN2018096489-appb-000001
Figure PCTCN2018096489-appb-000002
Figure PCTCN2018096489-appb-000002
从表2可以看出,0t(初始制水)时对比例中的串联式的反渗透膜元件与纳滤膜元件对Pb和Cd的去除能力较强,且2t水后可以保持较高的去除率;而对Cr的去除的初始去除能力较强,但是2t水后去除能力急剧下降,相应的,对As的去除效果也存在一定程度的降低。这说明在竞争吸附的环境下,复合滤芯(串联的反渗透膜元件与纳滤膜元件)优先被Cd和Pb吸附饱和,因而降低了对Cr的去除能力。It can be seen from Table 2 that the series reverse osmosis membrane element and nanofiltration membrane element in the comparative example at 0t (initial water production) have strong removal ability for Pb and Cd, and can maintain high removal after 2t water. The initial removal ability of Cr removal is strong, but the removal ability after 2t water drops sharply. Correspondingly, the removal effect of As is also reduced to some extent. This indicates that in a competitive adsorption environment, the composite filter element (reverse osmosis membrane element and nanofiltration membrane element in series) is preferentially saturated by Cd and Pb adsorption, thus reducing the ability to remove Cr.
针对对比例在表2中展示的“竞争吸附”所产生的问题,通过对图1所示本申请的实施例进行连续加标试验,采集对7吨(t)水过滤后Cr去除率,试验结果如图3所示。可以看出,具有重金属去除单元的实施例中可以持续有效地对Cr重金属去除,同时,对于Cr重金属的去除率一直高于95%,同样说明了该实施例对于Cr重金属离子具有较强地去除能力。For the problems caused by the "competitive adsorption" shown in Table 2, the Cr removal rate after filtration of 7 tons (t) of water was collected by performing a continuous spike test on the example of the present application shown in FIG. The result is shown in Figure 3. It can be seen that in the embodiment with the heavy metal removal unit, the heavy metal removal can be continuously and effectively removed, and the removal rate of the heavy metal for Cr is always higher than 95%, which also shows that the embodiment has strong removal of Cr heavy metal ions. ability.
这也说明了对图1所示实施例而言,由于膜元件(反渗透膜元件与纳滤膜元件)对Pb和Cd即具有很高的去除能力,因此屏蔽了重金属去除单元的吸附位点(过滤点)优先被Pb和Cd占据而影响Cr去除这一影响,从而表现出对Cr良好的去除能力,可见本申请将膜元件与重金属去除单元有机结合能够达到持续稳定地去除水中的重金属离子。This also shows that for the embodiment shown in Fig. 1, since the membrane element (reverse osmosis membrane element and nanofiltration membrane element) has a high removal ability for Pb and Cd, the adsorption site of the heavy metal removal unit is shielded. (Filtering point) is preferentially occupied by Pb and Cd to affect the effect of Cr removal, thereby showing good removal ability of Cr. It can be seen that the present invention combines the membrane element with the heavy metal removal unit to achieve continuous and stable removal of heavy metal ions in water. .
本文引用的任何数字值都包括从下限值到上限值之间以一个单位递增的下值和上值的所有值,在任何下值和任何更高值之间存在至少两个单位的间隔即可。举例来说,如果阐述了一个部件的数量或过程变量(例如温度、压力、时间等)的值是从1到90,优选从20到80,更优选从30到70,则目的是为了说明该说明书中也明确地列举了诸如15到85、22到68、43到51、30到32等值。对于小于1的值,适当地认为一个单位是0.0001、0.001、0.01、0.1。这些仅仅是想要明确表达的示例,可以认为在最低值和最高值之间列举的数值的所有可能组合都是以类似方式在该说明书明确地阐述了的。Any numerical value recited herein includes all values of the lower and upper values in increments of one unit from the lower limit to the upper limit, and at least two unit intervals between any lower value and any higher value. Just fine. For example, if the number of components or process variables (eg, temperature, pressure, time, etc.) is stated to be from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, the purpose is to illustrate Values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32 are also explicitly recited in the specification. For values less than 1, one unit is appropriately considered to be 0.0001, 0.001, 0.01, 0.1. These are merely examples that are intended to be expressly stated, and all possible combinations of numerical values recited between the minimum and maximum values are considered to be explicitly described in this specification in a similar manner.
除非另有说明,所有范围都包括端点以及端点之间的所有数字。与范围一起使用的“大约”或“近似”适合于该范围的两个端点。因而,“大约20到30”旨在覆盖“大约20到大约30”,至少包括指明的端点。All ranges include endpoints and all numbers between the endpoints unless otherwise indicated. "About" or "approximately" as used with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the indicated endpoints.
披露的所有文章和参考资料,包括专利申请和出版物,出于各种目的通过援引结合 于此。描述组合的术语“基本由…构成”应该包括所确定的元件、成分、部件或步骤以及实质上没有影响该组合的基本新颖特征的其他元件、成分、部件或步骤。使用术语“包含”或“包括”来描述这里的元件、成分、部件或步骤的组合也想到了基本由这些元件、成分、部件或步骤构成的实施方式。这里通过使用术语“可以”,旨在说明“可以”包括的所描述的任何属性都是可选的。All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of" to describe a combination shall include the identified elements, components, components or steps and other elements, components, components or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "comprises" or "comprises" or "comprises" or "comprising" or "comprising" or "comprising" or "comprises" By using the term "may" herein, it is intended to mean that any of the attributes described as "may" are optional.
多个元件、成分、部件或步骤能够由单个集成元件、成分、部件或步骤来提供。另选地,单个集成元件、成分、部件或步骤可以被分成分离的多个元件、成分、部件或步骤。用来描述元件、成分、部件或步骤的公开“一”或“一个”并不说为了排除其他的元件、成分、部件或步骤。Multiple elements, components, components or steps can be provided by a single integrated element, component, component or step. Alternatively, a single integrated component, component, component or step may be divided into separate components, components, components or steps. The use of the <RTI ID=0.0> </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;
应该理解,以上描述是为了进行图示说明而不是为了进行限制。通过阅读上述描述,在所提供的示例之外的许多实施方式和许多应用对本领域技术人员来说都将是显而易见的。因此,本教导的范围不应该参照上述描述来确定,而是应该参照所附权利要求以及这些权利要求所拥有的等价物的全部范围来确定。出于全面之目的,所有文章和参考包括专利申请和公告的公开都通过参考结合在本文中。在前述权利要求中省略这里公开的主题的任何方面并不是为了放弃该主体内容,也不应该认为发明人没有将该主题考虑为所公开的申请主题的一部分。It is to be understood that the above description is for the purpose of illustration and not limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art from this description. Therefore, the scope of the present invention should be determined by the scope of the appended claims The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference in its entirety for all purposes. The omitting of any aspect of the subject matter disclosed herein is not intended to be a disclaiming of the subject matter, and the inventor is not considered to be a part of the disclosed subject matter.

Claims (15)

  1. 一种净水系统,其特征在于,包括:A water purification system characterized by comprising:
    具有过滤膜的第一膜元件;所述第一膜元件具有第一进水口、第一出水口以及第一废水出口;a first membrane element having a filtration membrane; the first membrane element having a first water inlet, a first water outlet, and a first wastewater outlet;
    与所述第一膜元件串联的重金属去除单元;所述重金属去除单元具有第二进水口、第二出水口;所述第一进水口连接所述第二出水口,或者,所述第二进水口连接所述第一出水口;所述重金属去除单元能去除来水中的预定重金属离子。a heavy metal removal unit connected in series with the first membrane element; the heavy metal removal unit has a second water inlet and a second water outlet; the first water inlet is connected to the second water outlet, or the second inlet The nozzle is connected to the first water outlet; the heavy metal removal unit is capable of removing predetermined heavy metal ions in the incoming water.
  2. 一种净水系统,其特征在于,包括:A water purification system characterized by comprising:
    具有过滤膜的第一膜元件;所述第一膜元件具有第一进水口、第一出水口以及第一废水出口;a first membrane element having a filtration membrane; the first membrane element having a first water inlet, a first water outlet, and a first wastewater outlet;
    与所述第一膜元件串联的重金属去除单元;所述重金属去除单元包括具有第二进水口和第二出水口的壳体、以及位于壳体内的重金属吸附滤芯;所述第一进水口连接所述第二出水口,或者,所述第二进水口连接所述第一出水口;所述第二进水口的水流入第二出水口时经所述重金属吸附滤芯过滤。a heavy metal removal unit in series with the first membrane element; the heavy metal removal unit includes a housing having a second water inlet and a second water outlet, and a heavy metal adsorption filter cartridge located within the housing; the first water inlet connection The second water outlet is connected to the first water outlet; and the water of the second water inlet is filtered by the heavy metal adsorption filter when flowing into the second water outlet.
  3. 一种净水系统,其特征在于,包括:A water purification system characterized by comprising:
    具有过滤膜的第一膜元件;所述第一膜元件具有第一进水口、第一出水口以及第一废水出口;a first membrane element having a filtration membrane; the first membrane element having a first water inlet, a first water outlet, and a first wastewater outlet;
    与所述第一膜元件串联的重金属去除单元;所述重金属去除单元具有第二进水口、第二出水口;所述第一进水口连接所述第二出水口,或者,所述第二进水口连接所述第一出水口;所述第一膜元件和所述重金属去除单元处理能去除来水中95%以上的重金属。a heavy metal removal unit connected in series with the first membrane element; the heavy metal removal unit has a second water inlet and a second water outlet; the first water inlet is connected to the second water outlet, or the second inlet The nozzle is connected to the first water outlet; the first membrane element and the heavy metal removal unit are processed to remove more than 95% of the heavy metal in the incoming water.
  4. 如权利要求1-3任一所述的净水系统,其特征在于:所述第一膜元件为纳滤膜元件和/或反渗透膜元件。A water purification system according to any one of claims 1 to 3, wherein the first membrane element is a nanofiltration membrane element and/or a reverse osmosis membrane element.
  5. 如权利要求1-3任一所述的净水系统,其特征在于:所述重金属去除单元位于所述第一膜元件的下游。A water purification system according to any one of claims 1 to 3, wherein said heavy metal removal unit is located downstream of said first membrane element.
  6. 如权利要求1-3任一所述的净水系统,其特征在于:所述第一膜元件能使净化 后的水保留预定含量的矿物质。A water purification system according to any one of claims 1 to 3, wherein said first membrane element enables purified water to retain a predetermined amount of minerals.
  7. 如权利要求6所述的净水系统,其特征在于:所述第一膜元件为纳滤膜元件,或者,所述第一膜元件为纳滤膜和RO膜混卷的侧流膜元件。A water purification system according to claim 6, wherein said first membrane element is a nanofiltration membrane element, or said first membrane element is a lateral flow membrane element of a nanofiltration membrane and an RO membrane mixed volume.
  8. 如权利要求4所述的净水系统,其特征在于:还包括第二膜元件;所述第二膜元件具有第三进水口、第三出水口和第二废水出口;所述第一膜元件过滤后的水比所述第二膜元件过滤后的水保留更多的矿物质。A water purification system according to claim 4, further comprising: a second membrane element; said second membrane element having a third water inlet, a third water outlet, and a second wastewater outlet; said first membrane element The filtered water retains more minerals than the filtered water of the second membrane element.
  9. 如权利要求8所述的净水系统,其特征在于:所述第三进水口连接所述第一废水出口,和/或,所述第三进水口连接所述第一进水口的上游;A water purification system according to claim 8, wherein said third water inlet is connected to said first waste water outlet, and/or said third water inlet is connected upstream of said first water inlet;
    所述第三出水口与所述第一出水口排出的水汇合于所述重金属去除单元的上游或下游;The third water outlet and the water discharged from the first water outlet meet at the upstream or downstream of the heavy metal removal unit;
    所述重金属去除单元设置于所述第一膜元件下游,所述第一膜元件过滤后的水流入所述重金属去除单元。The heavy metal removal unit is disposed downstream of the first membrane element, and the filtered water of the first membrane element flows into the heavy metal removal unit.
  10. 如权利要求9所述的净水系统,其特征在于:所述第一膜元件为纳滤膜元件,所述第二膜元件为反渗透膜元件。A water purification system according to claim 9, wherein said first membrane element is a nanofiltration membrane element and said second membrane element is a reverse osmosis membrane element.
  11. 如权利要求1或3所述的净水系统,其特征在于:所述重金属去除单元包括具有第二进水口和第二出水口的壳体、以及位于壳体内的重金属吸附滤芯;所述第一出水口连接所述第二进水口,或者,所述第二出水口连接所述第一进水口;所述第二进水口的水流入第二出水口时经所述重金属吸附滤芯过滤。A water purification system according to claim 1 or 3, wherein said heavy metal removing unit comprises a casing having a second water inlet and a second water outlet, and a heavy metal adsorption filter cartridge located in the casing; said first The water outlet is connected to the second water inlet, or the second water outlet is connected to the first water inlet; and the water of the second water inlet is filtered by the heavy metal adsorption filter when flowing into the second water outlet.
  12. 如权利要求2或11所述的净水系统,其特征在于:所述壳体内设置有与所述第二进水口相通的第一流道、以及与所述第二出水口相通的第二流道;所述第一流道与所述第二流道之一位于所述重金属吸附滤芯内,另一位于所述重金属吸附滤芯外侧;所述第一流道内的水流入第二流道时经所述重金属吸附滤芯过滤。The water purification system according to claim 2 or 11, wherein the housing is provided with a first flow passage communicating with the second water inlet and a second flow passage communicating with the second water outlet One of the first flow channel and the second flow channel is located in the heavy metal adsorption filter cartridge, and the other is located outside the heavy metal adsorption filter cartridge; the water in the first flow channel flows into the second flow channel through the heavy metal Adsorption filter filtration.
  13. 如权利要求12所述的净水系统,其特征在于:所述壳体内还设有位于所述重 金属吸附滤芯下游的微滤膜滤芯;所述重金属吸附滤芯过滤后的水经所述微滤膜滤芯过滤后流入所述第二出水口。A water purification system according to claim 12, wherein said housing is further provided with a microfiltration membrane filter element downstream of said heavy metal adsorption filter element; said filtered water of said heavy metal adsorption filter element passes through said microfiltration membrane The filter element is filtered and flows into the second water outlet.
  14. 如权利要求13所述的净水系统,其特征在于:所述壳体内还设有顺次串联于所述第二流道与所述第二出水口之间的第三流道和第四流道;所述第三流道与所述第四流道之一位于所述微滤膜滤芯内,另一位于所述微滤膜滤芯外;所述第三流道内的水流入所述第四流道时经所述微滤膜滤芯过滤。A water purification system according to claim 13, wherein said housing is further provided with a third flow path and a fourth flow sequentially connected in series between said second flow path and said second water discharge port. One of the third flow channel and the fourth flow channel is located in the microfiltration membrane cartridge, and the other is located outside the microfiltration membrane cartridge; water in the third flow channel flows into the fourth The flow path is filtered through the microfiltration membrane cartridge.
  15. 如权利要求2或11所述的净水系统,其特征在于:所述重金属吸附滤芯包括活性炭、胶黏剂、重金属滤料;所述重金属滤料为Metsorb滤料、ATS滤料、微陶重金属滤料、改性沸石中的一种或几种的组合。The water purification system according to claim 2 or 11, wherein the heavy metal adsorption filter element comprises activated carbon, an adhesive, and a heavy metal filter; the heavy metal filter is a Metsorb filter, an ATS filter, and a micro-ceramic heavy metal. A combination of one or more of a filter material, a modified zeolite.
PCT/CN2018/096489 2017-07-21 2018-07-20 Water purification system WO2019015676A1 (en)

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CN207243582U (en) * 2017-07-21 2018-04-17 艾欧史密斯(南京)水处理产品有限公司 Water cleaning systems
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CN109231337A (en) * 2018-10-09 2019-01-18 四川农业大学 Farmland low concentration contains the portable absorbing treatment device of heavy metal containing sewage and processing method

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