格翎废水处理 纳滤膜成套设备

四、纳滤膜设备

NF System

1、概  述：    

1. Overview

纳滤膜是指具有“纳米级孔径”的膜，它介于超滤膜和反渗透膜之间，并对无机盐有一定的截留率，对有机物截留分子量从100～1000道尔顿不等。纳滤膜的主要特点是对二价离子、功能性糖类、小分子色素、多肽等物质的截留性能高于98%，而对于一些单价离子、小分子酸碱、醇等有30—80%的透过性能，常被应用于溶质的分级、溶液中低分子物质的洗脱和离子组份的调整、溶剂体系浓缩等物质的分离、精制、浓缩工艺过程中，纳滤分离技术还常被用于取代传统工艺中的冷冻干燥、薄膜蒸发、离子交换除盐、树脂工艺浓缩、中和等工艺过程。综合而言纳滤技术有如下特点：

    1）、过程在常温低压下进行，能耗低，不需加热，也无热效应及相态变化，不需加入任何其它物质即可达到分离、浓缩、纯化及分级等目的。

    2）、适合于热敏性物质的分离浓缩，特别是对需保持原产品气味、味道、形态、颜色和营养物质物化性质的食品及生化制品的分离浓缩有很重要的意义。

    3）、可对极稀溶质的浓缩回收，恒体积恒浓度下的脱盐纯化。

    4）、纳滤装置结构简单、占地面积小、所需附属设备少、安装方便、费用低、易插入已有生产工艺系统、扩大容量和增加组件容易；易于清洗，可反复长时间使用

    5）、完全根据用户需求，确定最佳系统回收率和系统脱盐率，从而获得高浓缩倍数或高纯度的物料；

Nanofiltration membrane refers to a membrane with a "nanoscale pore size", which is interposed between the ultrafiltration membrane and the reverse osmosis membrane and has a certain rejection rate for the inorganic salt, ranging from 100 to 1000 daltons The Nanofiltration membrane is the main feature of the divalent ions, functional sugars, small molecules, peptides and other substances interception performance is higher than 98%, and for some monovalent ions, small molecules acid, alcohol, etc. 30-80% The separation performance of the solvent is often applied to the classification of solutes, the elution of low molecular substances in the solution and the adjustment of the ionic components, the separation of the solvent system and other substances, the purification and concentration process, the nanofiltration separation technology is also often Used to replace the traditional process of freeze-drying, film evaporation, ion exchange desalination, resin process concentration, and other processes. In general, nanofiltration technology has the following characteristics:

    1), the process at room temperature and low pressure, low energy consumption, no heating, no thermal effect and phase change, without adding any other material to achieve separation, enrichment, purification and grading purposes. It is particularly suitable for:

    2), suitable for the separation and concentration of heat-sensitive substances, in particular, need to maintain the original product odor, taste, shape, color and the physical and chemical properties of nutrients and the separation and concentration of food and chemical products is of great significance.

    3), can be very thin solute concentration recovery, constant volume constant concentration of desalination purification.

    4), nanofiltration device structure is simple, small footprint, less ancillary equipment required, easy installation, low cost, easy to insert the existing production process system, expand the capacity and increase the components easy; easy to clean, can be repeated for a long time

    5), reverse osmosis membrane packing density, low investment cost, simple operation, short start-up time, easy maintenance and repair, easy automatic control, low system energy consumption, short production cycle, easy operation and maintenance, low running cost;

    6), based on user needs, to determine the best system recovery and system desalination rate, resulting in high concentration or high purity of the material;

    7), the core membrane components using world famous brands, quality assurance, the appearance of the use of sanitary stainless steel, fully enclosed pipeline operation, on-site safety and health, to meet the GMP (or FDA) specification requirements;

2、应用范围：

2.Applied Area:

     纳滤是在反渗透基础上发展起来的新型分离技术，虽然市场开拓的历史仅有10 多年，但它在水软化，抗生素、多糖、染料等的纯化分离和浓缩领域得到了较好的应用，可替代或部分替代反渗透膜，成为生物制药和精细化工的重要高效节能单元操作。用纳滤膜可去除水中三卤甲烷（THM）的前驱物， 以防止水中THM的生成。在食品工业中，已用于乳清浓缩，可将除盐、 除乳糖和蛋白质浓缩同时进行，并已达到工业化水平。还可用于食品脱色、氨某酸分离、多肽的纯化及浓缩。在废水处理方面，用纳滤膜对木材制浆碱萃取阶段所形成的废液进行脱色，脱色率达98％以上。用纳滤膜还可从酸性溶液中分离金属硫酸盐和硝酸盐，其中对硫酸镍的截留率可达95％。纳滤膜设备的工业化应用起步也非常早，在不断地积累和创新过程中，我们获得了大量的成功工程经验，并在将这些经验不断的推广应用到新的生产工艺中，其主要可以应用如下领域：

Nanofu is a new type of separation technology developed on the basis of reverse osmosis. Although the history of market development is only 10 years old, it has been applied in the field of purification, concentration and concentration of water softening, antibiotics, polysaccharides and dyes, Can replace or partially replace the reverse osmosis membrane, bio-pharmaceutical and fine chemical industry to become an important energy efficient unit operation. A precursor of trihalomethanes (THM) in water can be removed with a nanofiltration membrane to prevent the formation of THM in water. In the food industry, has been used for whey enrichment, can be desalted, in addition to lactose and protein concentration at the same time, and has reached the level of industrialization. Can also be used for food decolorization, ammonia acid separation, peptide purification and concentration. In the wastewater treatment, with the nanofiltration membrane on the wood pulp extraction stage of the formation of waste liquid decolorization, decolorization rate of 98% or more. The nanosulfate can also be used to separate the metal sulphates and nitrates from the acidic solution, with a rejection rate of up to 95% for nickel sulfate. The application of nanofiltration equipment is also very early in the process of continuous accumulation and innovation, we have a lot of successful engineering experience, and these experiences continue to promote the application to the new production process, which can be applied The following areas

   1).生物医药分离、提纯精制；

   2).电镀、染料行业的脱盐浓缩回收；

   3).环保行业等领域水处理达标排放或回用；

   4).食品行业浓缩(果糖、低聚糖、果汁等) ；

   5).生物发酵液的脱盐、浓缩(抗生素、氨基酸、有机酸等)；

   6).废酸、废碱回收（离交柱的洗柱废水、化纤行业碱液、印钞行业碱液等）。

1). Biomedical separation, purification and purification;

    2). Electroplating, dye industry desalination concentrated recovery;

    3). Environmental protection industry and other areas of water treatment standards discharge or reuse;

    4). Food industry concentrated (fructose, oligosaccharides, fruit juice, etc.);

    5). Desalination, concentration (antibiotics, amino acids, organic acids, etc.) of biological fermentation broth;

    6). Waste acid, waste alkali recovery (from the column of column washing wastewater, chemical industry lye, printing industry lye, etc.).

3、卷式纳滤膜：

3.Roll-type nanofiltration membrane

 目前最常用的纳滤膜为卷式结构与管式结构，其中卷式纳滤膜是最为普遍一种形式，可应用于各种难处理物料工艺过程的分离、提纯、浓缩，卷式纳滤膜由高强度支撑层、过渡层及膜层呈非对称地分布组成膜卷筒，将多个膜口袋卷绕到同一个中心管上，在给液料压力下，使淡液料通过膜进入膜口袋后汇流入产品液料中心管内，膜页之间的给液料通道中夹支撑层和导流层，具有抗压性强，工作压力高达5Mpa，采用聚醚砜高分子材料，抗污染性强，可长时间高效连续运行。

At present, the most commonly used nanofiltration membrane is a plate structure, a roll structure and a tubular structure, in which the roll type nanofiltration membrane is the most common form and can be applied to the separation, purification and concentration of various difficult materials. The nanofiltration membrane is composed of a high-strength support layer, a transition layer and a film layer which are asymmetrically distributed to form a film roll, and the plurality of membrane pockets are wound onto the same center tube, and the liquid material Through the membrane into the membrane pocket after the flow into the product liquid center tube, in order to facilitate the product liquid in the membrane bag pressure flow, in the envelope-like membrane bag is covered with a layer of liquid material flow guide high-strength fabric support layer; So that the liquid evenly through the membrane surface and to the liquid flow to disturb, in the membrane bag and the membrane between the liquid channel to the folder with a network layer, with a strong pressure, working pressure up to 5Mpa, using Polyether sulfone polymer material, strong anti-pollution, can be a long time and efficient continuous operation, roll-type nanofiltration membrane core tube as shown below:

                            卷式纳滤膜芯膜管

4、纳滤膜系统：

4. NF System

 纳滤使用范围广泛，生产规模和质量要求各异，因此装置流程也各不相同。纳滤系统可由单个或多个纳滤组件串联和并联，可组装成各种不同用途的大型装置。根据不同的使用目的，纳滤系统一般可分为浓缩型和分离型。根据生产规模和产品质量要求，又可以分为连续式、间歇循环式两种，并可进行不同级和段的配置。一个完整的反渗透装置，一般包括原液的预处理，反渗透膜组件、泵阀、管路及电气控制等三部分组成。

Nano filter use a wide range of production scale and quality requirements vary, so the device process is also different. The nanofiltration system can be connected in series and in parallel by single or multiple nanofiltration components and can be assembled into a variety of different applications. According to the purpose of different use, nanofiltration system can be divided into concentrated and separation type. According to the scale of production and product quality requirements, but also can be divided into continuous, intermittent two, and can be different levels and sections of the configuration. A complete reverse osmosis device, generally including the preparation of liquid, reverse osmosis membrane components, valves, piping and electrical control of three parts.

  1）、纳滤膜系统规格表：

1). NF System Parameter Sheet: