CN207546236U - A kind of sewage-treatment plant for improving membrane filtration system performance - Google Patents
A kind of sewage-treatment plant for improving membrane filtration system performance Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 211
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- 238000000108 ultra-filtration Methods 0.000 abstract description 55
- 238000001471 micro-filtration Methods 0.000 abstract description 51
- 238000001223 reverse osmosis Methods 0.000 abstract description 39
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Abstract
本实用新型公开了一种提高膜过滤系统性能的污水处理装置，属于废水处理工艺及装置技术领域。本实用新型采用的单个压力容器内串联至少含有两种不同类型的过滤单元（预处理微滤（MF）或超滤（UF）+膜过滤纳滤（NF）或反渗透（RO）），所需的压力容器串联或并联在一起，通过本实用新型技术可以使MF/UF膜元件再生，减小过滤系统占用面积，减轻膜污染，提高经济效益。
The utility model discloses a sewage treatment device for improving the performance of a membrane filtration system, which belongs to the technical field of waste water treatment technology and devices. The single pressure vessel adopted in the utility model contains at least two different types of filtration units in series (pretreatment microfiltration (MF) or ultrafiltration (UF) + membrane filtration nanofiltration (NF) or reverse osmosis (RO)), so The required pressure vessels are connected in series or in parallel, and the MF/UF membrane elements can be regenerated through the technology of the utility model, which reduces the area occupied by the filtration system, reduces membrane pollution, and improves economic benefits.
Description
技术领域technical field
本实用新型属于废水处理工艺及装置技术领域，具体涉及一种提高膜过滤系统性能的污水处理装置。The utility model belongs to the technical field of waste water treatment technology and devices, in particular to a sewage treatment device for improving the performance of a membrane filtration system.
背景技术Background technique
我国是一个干旱缺水严重的国家，同时地下水体遭受了一定程度的点状和面状污染，并且有逐年加重的趋势。愈加恶化的水污染不仅降低了水体的使用功能，进一步加剧了水资源短缺的矛盾，也威胁到了人们的饮水安全和身体健康。因此，包括膜技术在内的一些新型给水过滤技术，在日常生活中也日益显示出它们的重要性。膜技术作为新型分离技术已广泛应用于气体分离、物料分离和水处理领域，其中以水处理领域对膜产品的应用需求尤为突出。但是在膜法废水处理过程中，由于进水料液中微粒污染物在膜表面沉积或膜孔内吸附，造成膜孔径变小或堵塞，使得膜分离性能逐渐下降，膜污染现象难以避免且愈加严重。膜污染可以通过采用耐污染性的膜材料，进料液预处理和优化系统配置和操作条件等方法予以消除或降低。对于传统预处理技术如多级滤床，却存在有占地面积大和重量大等缺点，限制了这些常规预处理技术在有限空间试验场地的应用。此外，传统预处理技术的产水质量波动较大，容易引发后续分离过程中膜面严重的不可逆污染。my country is a country with severe drought and water shortage. At the same time, the groundwater body suffers from a certain degree of point and surface pollution, and there is a trend of increasing year by year. Worsening water pollution not only reduces the use function of water bodies, further exacerbates the contradiction of water shortage, but also threatens people's drinking water safety and health. Therefore, some new water supply filtration technologies, including membrane technology, are increasingly showing their importance in daily life. As a new separation technology, membrane technology has been widely used in the fields of gas separation, material separation and water treatment, among which the demand for membrane products in the field of water treatment is particularly prominent. However, in the process of membrane wastewater treatment, due to the deposition of particulate pollutants in the feed liquid on the membrane surface or adsorption in the membrane pores, the membrane pore size becomes smaller or blocked, the membrane separation performance gradually declines, and membrane fouling is unavoidable and increasingly serious. serious. Membrane fouling can be eliminated or reduced by using fouling-resistant membrane materials, feed liquid pretreatment, and optimizing system configuration and operating conditions. For traditional pretreatment technologies such as multi-stage filter beds, there are disadvantages such as large footprint and heavy weight, which limit the application of these conventional pretreatment technologies in limited space test sites. In addition, the water quality of traditional pretreatment technology fluctuates greatly, which is easy to cause serious irreversible pollution of the membrane surface in the subsequent separation process.
MF膜和UF膜均能够截留进水料液中的悬浮物、细菌、部分病毒及大尺寸的胶体等潜在污染物，RO膜能够阻挡所有的溶解性无机盐离子及分子量大于100道尔顿的有机物，但允许水分子透过。NF膜又叫“疏松型”的RO膜，能截留的分子尺寸大小约为l nm，对于无机盐的分离存在道南效应，导致其对单价离子的去除率低于多价阴离子。选用合适的膜法预处理和膜清洗技术可以提高后续膜元件的使用效率，减缓膜污染。MF膜和UF膜经常用于NF膜和RO膜的预处理步骤，具有节能、占地面积小和便于操作等优点。此外，反冲洗能够有效地减轻膜污染，并且不会对膜造成二次污染，是最经济的膜清洗技术。公开号为CN201033756A的专利公开了一种采用水处理池、沉淀池、软化中和池等工序的废水处理设备，该实用新型简单廉价，处理后水全部回用，污泥用作填料和肥料，但该技术存在分离效率低，过滤效果不好，设备占用面积太大等问题。公开号为CN 102961967A的专利公开了一种内置有多个板状烧结多孔膜过滤元件的膜过滤装置，该过滤装置的过滤面积显著增大，过滤效果明显提高，占地面积小，但是该装置运行实验中膜污染后清洗困难，如果密封连接出现问题，则严重影响过滤效果。本实用新型首次采用将至少两个不同类型的膜元件内置于同一压力容器内并串联排列，该压力容器包括一个用于为不同类型膜元件提供进水料液的进水口；至少一个用于为不同类型膜元件提供产水通道的产水出口；至少一个用于为不同类型膜元件提供浓水通道的浓水出口。不同类型的膜元件中的一种为MF膜或UF膜，另一种为RO膜或NF膜。本实用新型能够减少废水处理装置的占地面积，并且多个所需的压力容器并联在一起，提高了水处理效率，同时通过在线反冲洗使MF膜或UF膜元件再生，延长膜元件的使用寿命，降低经济成本。相关的文献检索不到有关本专利的内容。Both the MF membrane and the UF membrane can intercept potential pollutants such as suspended solids, bacteria, some viruses, and large-sized colloids in the feed liquid, and the RO membrane can block all dissolved inorganic salt ions and particles with a molecular weight greater than 100 Daltons. Organic matter, but allows water molecules to pass through. The NF membrane is also called the "loose type" RO membrane. The molecular size that can be intercepted is about 1 nm. There is a Donnan effect for the separation of inorganic salts, resulting in a lower removal rate of monovalent ions than polyvalent anions. Selecting appropriate membrane pretreatment and membrane cleaning technology can improve the efficiency of subsequent membrane elements and reduce membrane fouling. MF membranes and UF membranes are often used in the pretreatment steps of NF membranes and RO membranes, which have the advantages of energy saving, small footprint and easy operation. In addition, backwashing can effectively reduce membrane fouling without causing secondary pollution to the membrane, and is the most economical membrane cleaning technology. The patent with the publication number CN201033756A discloses a wastewater treatment equipment using processes such as a water treatment tank, a sedimentation tank, and a softening neutralization tank. However, this technology has problems such as low separation efficiency, poor filtration effect, and large equipment occupation area. The patent with the publication number CN 102961967A discloses a membrane filtration device with a plurality of plate-shaped sintered porous membrane filter elements built in. The filtration area of the filtration device is significantly increased, the filtration effect is significantly improved, and the floor space is small. However, the device It is difficult to clean the membrane after fouling in the running experiment. If there is a problem with the sealing connection, it will seriously affect the filtration effect. For the first time in the utility model, at least two different types of membrane elements are built into the same pressure vessel and arranged in series. The pressure vessel includes a water inlet for providing feed liquid for different types of membrane elements; at least one for Different types of membrane elements provide product water outlets for water production channels; at least one concentrated water outlet for providing concentrated water channels for different types of membrane elements. One of the different types of membrane elements is MF membrane or UF membrane, and the other is RO membrane or NF membrane. The utility model can reduce the occupied area of the wastewater treatment device, and multiple required pressure vessels are connected in parallel to improve the water treatment efficiency. At the same time, the MF membrane or UF membrane element can be regenerated by online backwashing to prolong the use of the membrane element. life and reduce economic costs. Relevant documents can not retrieve the content of this patent.
发明内容Contents of the invention
本实用新型的目的在于解决现有过滤系统占地面积大、膜污染严重、过滤效率低和浪费水资源的问题而提供了一种提高膜过滤系统性能的污水处理装置，有效降低了废水处理的经济成本。采用在压力容器内串联至少两种不同类型的膜元件，并将所需压力容器并联或串联排列，从而有效提高膜过滤系统的过滤效率，同时基于压差传感器实现间歇式在线反冲洗，从而减轻MF/UF膜元件污染并使其再生。本工艺设计灵活，可根据过滤系统允许的产水质量要求具体设置。The purpose of this utility model is to solve the problems of large floor area, serious membrane pollution, low filtration efficiency and waste of water resources in the existing filtration system, and provide a sewage treatment device that improves the performance of the membrane filtration system, effectively reducing the cost of wastewater treatment. economic cost. At least two different types of membrane elements are connected in series in the pressure vessel, and the required pressure vessels are arranged in parallel or in series, so as to effectively improve the filtration efficiency of the membrane filtration system, and at the same time realize intermittent online backwashing based on the differential pressure sensor, thus reducing MF/UF membrane elements are fouled and regenerated. The design of this process is flexible, and it can be specifically set according to the quality requirements of the product water allowed by the filtration system.
本实用新型为实现上述目的采用如下技术方案，一种提高膜过滤系统性能的污水处理装置，其特征在于包括多个相互并联或/和串联的压力容器，每个压力容器内均设有至少两个不同类型的膜元件且该不同类型的膜元件串联排列，不同类型的膜元件中的一种类型为MF/UF膜元件，另一种类型为RO/NF膜元件，压力容器上设有一个用于为不同类型的膜元件提供进水通道的进水口、至少一个用于为不同类型的膜元件提供产水通道的产水出口、至少一个用于为不同类型的膜元件提供浓水通道的浓水出口及至少一个用于为MF/UF膜元件提供反冲洗进水的反冲洗进水口；进水口通过管道及定向控制阀与进水总管连接，该进水总管上沿进水方向依次设有进水流量控制阀、进水流量传感器、调节阀和进水压力传感器；产水出口通过管道与出水总管连接，出水总管与产水池相连，该出水总管上沿出水方向依次设有出水压力传感器、调节阀和产水流量传感器；浓水出口通过管道及调节阀与第二段RO/NF膜组件的进水口连接，第二段RO/NF膜组件的产水出口通过管道与出水总管连接，第二段RO/NF膜组件的浓水出口通过管道及浓水流量控制阀与浓水池相连；反冲洗进水口通过管道及调节阀与反冲洗管道连接，反冲洗管道的进液口与反冲洗进水池相连，定向控制阀的旁路出液口均与反冲洗管道连接，反冲洗进水支路与定向控制阀连接支路之间的反冲洗管道上沿反冲洗进水方向依次设有调节阀和测压支路，测压支路的另一端与进水总管连接，该测压支路上设有反冲洗跨MF/UF膜压差传感器组件，反冲洗管道的出液口与反冲洗出水池相连，邻近反冲洗出水池的反冲洗管道上沿反冲洗出水方向依次设有反冲洗流量传感器和反冲洗流量控制阀。The utility model adopts the following technical scheme to achieve the above purpose, a sewage treatment device for improving the performance of the membrane filtration system, which is characterized in that it includes a plurality of pressure vessels connected in parallel or/and in series, and each pressure vessel is equipped with at least two different types of membrane elements and the different types of membrane elements are arranged in series, one type of different types of membrane elements is MF/UF membrane elements, the other type is RO/NF membrane elements, and the pressure vessel is equipped with a Water inlet for providing water inlet channels for different types of membrane elements, at least one product water outlet for providing water product channels for different types of membrane elements, at least one outlet for providing concentrated water channels for different types of membrane elements Concentrated water outlet and at least one backwash water inlet for providing backwash water for MF/UF membrane elements; the water inlet is connected to the main water inlet through pipes and directional control valves, and the water inlet main There are water inlet flow control valves, inlet water flow sensors, regulating valves and inlet water pressure sensors; the water outlet is connected to the water outlet main pipe through pipes, and the water outlet main pipe is connected to the water production tank, and the water outlet main pipe is equipped with outlet water pressure sensors in sequence along the water outlet direction , regulating valve and product water flow sensor; the concentrated water outlet is connected to the water inlet of the second RO/NF membrane module through the pipeline and the regulating valve, and the product water outlet of the second RO/NF membrane module is connected to the water outlet main pipe through the pipeline. The concentrated water outlet of the second RO/NF membrane module is connected to the concentrated water tank through a pipeline and a concentrated water flow control valve; the backwash water inlet is connected to the backwash pipeline through a pipeline and a regulating valve, and the backwash pipeline liquid inlet The water inlet pool is connected, and the bypass liquid outlet of the directional control valve is connected with the backwash pipeline. Valve and pressure measurement branch, the other end of the pressure measurement branch is connected to the water inlet main, the pressure measurement branch is equipped with a backwash cross-MF/UF membrane differential pressure sensor assembly, the liquid outlet of the backwash pipeline is connected to the backwash outlet The pools are connected, and a backwash flow sensor and a backwash flow control valve are sequentially arranged on the backwash pipeline adjacent to the backwash outlet pool along the backwash water outlet direction.
进一步优选，所述压力容器内不同类型的膜元件采用紧贴式的排列方式，用于有效防止膜元件之间或膜元件周围发生泄漏，压力容器两端分别设置密封组件，用于防止压力容器水液口、产水出口和浓水出口发生泄漏。Further preferably, the different types of membrane elements in the pressure vessel are arranged in a close-fitting manner, which is used to effectively prevent leakage between or around the membrane elements, and sealing assemblies are respectively provided at both ends of the pressure vessel to prevent water leakage in the pressure vessel. Leakage occurred in liquid port, product water outlet and concentrated water outlet.
进一步优选，所述膜元件表面带有负电荷。Further preferably, the surface of the membrane element is negatively charged.
进一步优选，所述压力容器为中空漏斗状构型或中空哑铃状构型，用于促进进水流体的流动和分离，压力容器的材质为塑料、玻璃钢或合金材料，压力容器的长度为1-16m。Further preferably, the pressure vessel is a hollow funnel-shaped configuration or a hollow dumbbell-shaped configuration, which is used to promote the flow and separation of the influent fluid. The material of the pressure vessel is plastic, glass fiber reinforced plastic or alloy material, and the length of the pressure vessel is 1- 16m.
进一步优选，所述压力容器内设有串联的MF/UF膜元件和NF/RO膜元件，三个压力容器相互并联，用于提高膜过滤效率，进水料液通过压力容器的MF/UF膜元件进行预处理，用于去除进水料液中的颗粒物和悬浮固体，预处理后的产水直接进入压力容器内串联的NF/RO膜元件，用于有效去除进水料液中的污染离子，处理后的含有低溶解性盐的产水通过产水出口排出，NF/RO膜元件处理后的含有高盐浓度的浓水和MF/UF膜处理后的浓水混合后从压力容器的浓水出口排出。Further preferably, the pressure vessel is provided with MF/UF membrane elements and NF/RO membrane elements in series, and the three pressure vessels are connected in parallel to improve membrane filtration efficiency, and the feed liquid passes through the MF/UF membrane of the pressure vessel The element is pretreated to remove particulate matter and suspended solids in the feed water. The pretreated product water directly enters the NF/RO membrane elements connected in series in the pressure vessel to effectively remove polluting ions in the feed water. , the treated product water containing low-soluble salts is discharged through the product water outlet, the concentrated water containing high salt concentration treated by NF/RO membrane elements and the concentrated water treated by MF/UF membranes are mixed and then discharged from the concentrated water of the pressure vessel The water outlet is discharged.
本实用新型所述的提高膜过滤系统性能的污水处理装置的运行方法，其特征在于具体过程为：进水料液通过进水总管经进水流量控制阀和定向控制阀由压力容器的进水口进入压力容器，进水料液在压力容器中依次经过MF/UF膜元件和NF/RO膜元件过滤后由压力容器产水出口通过出水总管排入产水池，压力容器中MF/UF膜和NF/RO膜的浓水均由压力容器浓水出口通过管道进入第二段NF/RO膜组件，经第二段NF/RO膜组件过滤后的产水通过出水总管进入产水池，经第二段NF/RO膜组件过滤后的浓水通过浓水管道进入浓水池；当反冲洗跨MF/UF膜压差传感器组件测得MF/UF膜元件两侧的压差超过设定的压力值时，交替停止运行多个并联的压力容器并启动反冲洗过程，反冲洗进水通过压力容器上的反冲洗进水口进入压力容器，反冲洗进水口位于压力容器中MF/UF膜元件与NF/RO膜元件之间，对MF/UF膜元件反冲洗后的反冲洗出水通过反冲洗管道经定向控制阀和反冲洗流量控制阀进入反冲洗出水池，依次交替对多个压力容器内的MF/UF膜元件进行反冲洗以完成对MF/UF膜元件的在线反冲洗环节。The operating method of the sewage treatment device for improving the performance of the membrane filtration system described in the utility model is characterized in that the specific process is: the feed liquid passes through the feed water main pipe, passes the feed water flow control valve and the directional control valve, and passes through the water inlet of the pressure vessel. After entering the pressure vessel, the feed water is filtered by MF/UF membrane elements and NF/RO membrane elements in sequence in the pressure vessel, and then discharged into the water production pool from the outlet of the pressure vessel through the water outlet main pipe. In the pressure vessel, the MF/UF membrane and NF The concentrated water of the /RO membrane enters the second NF/RO membrane module through the pipe from the concentrated water outlet of the pressure vessel, and the product water filtered by the second NF/RO membrane module enters the water production tank through the water outlet main pipe, and passes through the second stage The concentrated water filtered by the NF/RO membrane module enters the concentrated water tank through the concentrated water pipeline; Alternately stop running multiple parallel pressure vessels and start the backwashing process. The backwashing water enters the pressure vessel through the backwashing water inlet on the pressure vessel. The backwashing water inlet is located in the pressure vessel. The MF/UF membrane element and the NF/RO membrane Between the elements, the backwash effluent after backwashing the MF/UF membrane elements enters the backwash effluent pool through the backwash pipeline through the directional control valve and the backwash flow control valve, and alternately washes the MF/UF membranes in multiple pressure vessels. The elements are backwashed to complete the online backwashing link for MF/UF membrane elements.
进一步优选，所述进水料液中SO4 2-的浓度为500-2800mg/L和总溶解固体含盐量浓度为1000-45000mg/L，通过过滤单元之后的产水中SO4 2-的浓度≤50mg/L和总溶解固体含盐量的浓度≤1000mg/L，过滤单元对进水中离子的截留率介于20%-99%之间。Further preferably, the concentration of SO 4 2- in the feed water is 500-2800 mg/L and the concentration of total dissolved solids salt content is 1000-45000 mg/L, and the concentration of SO 4 2- in the product water after passing through the filter unit is ≤50mg/L and the concentration of total dissolved solids salt content ≤1000mg/L, the retention rate of the filter unit for ions in the influent is between 20% and 99%.
本实用新型为了避免第一级过滤中MF/UF膜元件表面或MF/UF膜元件膜孔堵塞，采用反冲洗操作，将该膜元件表面的悬浮固体进行去除和收集，通过反冲洗跨MF/UF膜压差传感器组件在线监测第一级过滤中MF/UF膜元件两侧的压差，当压差超过一定值（≥0.15MPa）时，该压力容器内的MF/UF膜元件进行反冲洗。In order to avoid the clogging of the surface of the MF/UF membrane element or the membrane pores of the MF/UF membrane element in the first-stage filtration, the utility model adopts a backwashing operation to remove and collect the suspended solids on the surface of the membrane element, and through backwashing across the MF/UF The UF membrane pressure difference sensor component monitors the pressure difference on both sides of the MF/UF membrane element in the first stage of filtration online. When the pressure difference exceeds a certain value (≥0.15MPa), the MF/UF membrane element in the pressure vessel is backwashed .
本实用新型的污水处理装置包括多个压力容器，可以串联或并联或串并联一起，过滤系统是灵活设计根据过滤系统允许出水的质量要求设置。单个压力容器的进水可以为进水料液原样，也可以为其它压力容器的浓排水。系统还包括多个能量回收装置（如液压增压器），收集多个压力容器内浓水的能量，用于增加同一压力容器内过滤单元内进水的操作压力，如在RO膜浓水中高达60%以上的能量被回收利用，而NF膜至少能够回收利用≥16%以上的浓水能量。The sewage treatment device of the present invention includes a plurality of pressure vessels, which can be connected in series or in parallel or together in series and parallel. The filter system is flexibly designed and set according to the quality requirements of the filter system. The feed water of a single pressure vessel can be the original feed water or the concentrated discharge water of other pressure vessels. The system also includes a number of energy recovery devices (such as hydraulic boosters), which collect the energy of concentrated water in multiple pressure vessels, and are used to increase the operating pressure of the water in the filter unit in the same pressure vessel, such as in RO membrane concentrated water up to More than 60% of the energy is recycled, and the NF membrane can at least recycle more than 16% of the concentrated water energy.
本实用新型是一种废水处理采用的膜组件过滤器，采用的单个压力容器内，串联至少含有两种不同类型的过滤单元（预处理微滤（MF）或超滤（UF）+膜过滤纳滤（NF）或反渗透（RO）），所需的压力容器串联或并联在一起，通过本实用新型技术可以使MF/UF膜元件再生，减小过滤系统占用面积，减轻膜污染，提高经济效益。The utility model relates to a membrane module filter used in wastewater treatment. In a single pressure vessel, at least two different types of filter units (pretreatment microfiltration (MF) or ultrafiltration (UF) + membrane filtration nanofiltration) are connected in series. Filtration (NF) or reverse osmosis (RO)), the required pressure vessels are connected in series or in parallel, through the technology of the utility model, the MF/UF membrane element can be regenerated, the occupied area of the filtration system can be reduced, the membrane pollution can be reduced, and the economic efficiency can be improved. benefit.
本实用新型与现有技术相比具有以下有益效果：使用的单一压力容器内将两种不同类型的预处理（MF/UF膜元件）过滤单元与RO/NF膜过滤单元等的过滤单元通过互连设置在一起，并将多个类似压力容器串联或并联排列，可以结构性地改进膜过滤系统装置的空间利用率，有效地降低膜过滤系统的厂房占地面积和重量，降低投资费用成本；通过在线监测特定压力容器内第一段的MF/UF膜元件的压降变化，利用来自一个或多个其它压力容器内第一级MF/UF膜元件产水，对特定压力容器内第一段的MF/UF膜元件进行反冲洗，在达到有效去除膜污染使其再生的同时，减少了现有工艺中常见的反冲洗水箱、MF/UF膜产水箱等中间体，进一步优化了膜过滤系统的存储空间；通过多个压力容器的并联排列，多个压力容器的第一段MF/UF膜元件反冲洗可以依次进行，也可以采用交替反冲洗操作，并在反冲洗过程中，适度加大其它压力容器内膜组件的进水量，既保证了膜过滤系统主体工艺的不间断操作运行，又保证了主体工艺造水量的高位持续稳定；本过滤系统是灵活的设计根据过滤系统允许出水的质量要求定制，减小占地面积，操作简单方便，延长膜使用寿命，运行成本维护低经济高效。Compared with the prior art, the utility model has the following beneficial effects: two different types of pretreatment (MF/UF membrane element) filter units and RO/NF membrane filter units and other filter units are passed through each other in a single pressure vessel. Connecting together and arranging multiple similar pressure vessels in series or in parallel can structurally improve the space utilization rate of the membrane filtration system device, effectively reduce the floor space and weight of the membrane filtration system plant, and reduce investment costs; By online monitoring the pressure drop change of the MF/UF membrane element in the first stage of a specific pressure vessel, using the water produced from the first stage MF/UF membrane element in one or more other pressure vessels, the first stage of the specific pressure vessel The MF/UF membrane element is used for backwashing, which can effectively remove membrane fouling and regenerate it, and reduce the common intermediates such as backwash water tank and MF/UF membrane water tank in the existing process, and further optimize the membrane filtration system. storage space; through the parallel arrangement of multiple pressure vessels, the backwashing of the first section of MF/UF membrane elements in multiple pressure vessels can be carried out sequentially, or alternate backwashing operations can be used, and during the backwashing process, a moderate increase The water intake of the membrane components in other pressure vessels not only ensures the uninterrupted operation of the main process of the membrane filtration system, but also ensures the high level of continuous and stable water production of the main process; Customization is required, the footprint is reduced, the operation is simple and convenient, the service life of the membrane is extended, the operating cost is low and the maintenance is economical and efficient.
附图说明Description of drawings
图1是本实用新型中提高膜过滤系统性能的污水处理装置的结构示意图。Fig. 1 is a structural schematic diagram of a sewage treatment device for improving the performance of a membrane filtration system in the present invention.
图中：1-进水流量控制阀，2-进水流量传感器，3-调节阀，4-进水压力传感器，5-反冲洗跨MF/UF膜压差传感器组件，6-定向控制阀，7-MF/UF膜元件，8-NF/RO膜元件，9-压力容器，10-第二段NF/RO膜元件，11-浓水流量控制阀，12-浓水池，13-反冲洗流量控制阀，14-反冲洗流量传感器，15-产水流量传感器，16-产水池，17-反冲洗进水池。In the figure: 1-water inlet flow control valve, 2-water inlet flow sensor, 3-regulating valve, 4-water inlet pressure sensor, 5-backwash across MF/UF membrane differential pressure sensor assembly, 6-directional control valve, 7-MF/UF membrane element, 8-NF/RO membrane element, 9-pressure vessel, 10-second stage NF/RO membrane element, 11-concentrated water flow control valve, 12-concentrated water tank, 13-backwash flow Control valve, 14-backwash flow sensor, 15-product water flow sensor, 16-product water tank, 17-backwash water inlet tank.
具体实施方式Detailed ways
结合附图详细描述本实用新型的具体内容。The specific content of the utility model is described in detail in conjunction with the accompanying drawings.
如图1所示，一种提高膜过滤系统性能的污水处理装置，包括多个相互并联的压力容器9，每个压力容器9内均设有两个不同类型的膜元件且该不同类型的膜元件串联排列，不同类型的膜元件中的一种类型为MF/UF膜元件7，另一种类型为RO/NF膜元件8，压力容器9上设有一个用于为不同类型的膜元件提供进水通道的进水口、至少一个用于为不同类型的膜元件提供产水通道的产水出口、至少一个用于为不同类型的膜元件提供浓水通道的浓水出口及至少一个用于为MF/UF膜元件7提供反冲洗进水的反冲洗进水口；进水口通过管道及定向控制阀6与进水总管连接，该进水总管上沿进水方向依次设有进水流量控制阀1、进水流量传感器2、调节阀3和进水压力传感器4；产水出口通过管道与出水总管连接，出水总管与产水池16相连，该出水总管上沿出水方向依次设有出水压力传感器、调节阀和产水流量传感器15；浓水出口通过管道及调节阀与第二段RO/NF膜组件10的进水口连接，第二段RO/NF膜组件10的产水出口通过管道与出水总管连接，第二段RO/NF膜组件10的浓水出口通过管道及浓水流量控制阀11与浓水池12相连；反冲洗进水口通过管道及调节阀与反冲洗管道连接，反冲洗管道的进液口与反冲洗进水池17相连，定向控制阀6的旁路出液口均与反冲洗管道连接，反冲洗进水支路与定向控制阀连接支路的反冲洗管道上沿反冲洗进水方向依次设有调节阀和测压支路，测压支路的另一端与进水总管连接，该测压支路上设有反冲洗跨MF/UF膜压差传感器组件5，反冲洗管道的出液口与反冲洗出水池相连，邻近反冲洗液出水池的反冲洗管道上沿反冲洗出水方向依次设有反冲洗流量传感器14和反冲洗流量控制阀13。As shown in Figure 1, a sewage treatment device for improving the performance of a membrane filtration system includes a plurality of pressure vessels 9 connected in parallel, each pressure vessel 9 is provided with two different types of membrane elements and the different types of membranes The elements are arranged in series, one of the different types of membrane elements is MF/UF membrane element 7, the other type is RO/NF membrane element 8, and a pressure vessel 9 is provided to provide different types of membrane elements The water inlet of the water inlet channel, at least one product water outlet for providing water production channels for different types of membrane elements, at least one concentrated water outlet for providing concentrated water channels for different types of membrane elements, and at least one for providing The MF/UF membrane element 7 provides the backwash water inlet for the backwash water; the water inlet is connected to the water inlet main pipe through the pipeline and the directional control valve 6, and the water inlet flow control valve 1 is arranged sequentially along the water inlet direction on the water inlet main pipe , the water inlet flow sensor 2, the regulating valve 3 and the water inlet pressure sensor 4; the outlet of the produced water is connected with the water outlet main pipe through the pipeline, and the water outlet main pipe is connected with the water production tank 16, and the water outlet main pipe is successively provided with the water outlet pressure sensor, the regulating valve and the water outlet along the water outlet direction. Valve and product water flow sensor 15; the concentrated water outlet is connected to the water inlet of the second RO/NF membrane module 10 through a pipeline and a regulating valve, and the product water outlet of the second RO/NF membrane module 10 is connected to the water outlet main pipe through a pipeline , the concentrated water outlet of the second RO/NF membrane module 10 is connected to the concentrated water tank 12 through the pipeline and the concentrated water flow control valve 11; The backwash inlet is connected to the backwash water inlet pool 17, the bypass liquid outlet of the directional control valve 6 is connected to the backwash pipeline, and the backwash water inlet branch and the backwash water inlet branch of the directional control valve are connected along the backwash water inlet direction. A regulating valve and a pressure measurement branch are arranged in sequence, and the other end of the pressure measurement branch is connected to the water inlet main. The pressure measurement branch is provided with a backwash cross-MF/UF membrane differential pressure sensor assembly 5, and the outlet of the backwash pipeline The mouth is connected with the backwash outlet pool, and the backwash flow sensor 14 and the backwash flow control valve 13 are arranged in sequence along the backwash water outlet direction on the backwash pipeline adjacent to the backwash liquid outlet pool.
本实用新型所述的提高膜过滤系统性能的污水处理装置的运行方法，具体过程为：进水料液通过进水总管经进水流量控制阀和定向控制阀由压力容器的进水口进入压力容器，进水废液在压力容器中依次经过MF/UF膜元件和NF/RO膜元件过滤后由压力容器产水出口通过出水总管排入产水池，压力容器中MF/UF膜元件和NF/RO膜元件的浓水均由压力容器浓水出口通过管道进入第二段NF/RO膜组件，经第二段NF/RO膜组件过滤后的产水通过出水总管进入产水池，经第二段NF/RO膜组件过滤后的浓水通过浓水管道进入浓水池；当反冲洗跨MF/UF膜压差传感器组件测得MF/UF膜元件两侧的压差超过设定的压力值时，交替停止运行多个并联的压力容器并启动反冲洗过程，反冲洗进水通过压力容器上的反冲洗进水口进入压力容器，反冲洗进水口位于压力容器中MF/UF膜元件和NF/RO膜元件之间，对MF/UF膜元件反冲洗后的反冲洗出水通过反冲洗管道经定向控制阀和反冲洗流量控制阀进入反冲洗出水池，依次交替对多个压力容器内的MF/UF膜元件进行反冲洗以完成对MF/UF膜元件的在线反冲洗环节。The operation method of the sewage treatment device for improving the performance of the membrane filtration system described in the utility model, the specific process is: the feed liquid enters the pressure vessel from the water inlet of the pressure vessel through the water inlet main pipe through the water inlet flow control valve and the directional control valve , the influent waste liquid is filtered by MF/UF membrane element and NF/RO membrane element successively in the pressure vessel, and then discharged into the produced water pool from the outlet of the pressure vessel through the water outlet main pipe, and the MF/UF membrane element and NF/RO membrane element in the pressure vessel The concentrated water of the membrane elements enters the second section of NF/RO membrane module through the pipe from the outlet of the concentrated water of the pressure vessel. The concentrated water filtered by the /RO membrane module enters the concentrated water tank through the concentrated water pipeline; when the pressure difference across the MF/UF membrane pressure sensor assembly measured by the backwash exceeds the set pressure value, alternately Stop the operation of multiple parallel pressure vessels and start the backwashing process. The backwashing water enters the pressure vessel through the backwashing water inlet on the pressure vessel. The backwashing water inlet is located in the MF/UF membrane element and NF/RO membrane element in the pressure vessel. In between, the backwash effluent after backwashing the MF/UF membrane elements enters the backwash effluent pool through the backwash pipeline through the directional control valve and the backwash flow control valve, and alternately washes the MF/UF membrane elements in multiple pressure vessels Backwashing is carried out to complete the online backwashing of MF/UF membrane elements.
实施例1Example 1
当含有包括500mg/L的SO4 2-和1000mg/L的总溶解固体含盐量的进水废液通过该膜过滤系统时，采用长度为4.7m的玻璃钢材质的压力容器内，依次串联有一级UF预处理膜元件和三支NF膜元件，进水料液分别通过三支并联排列的压力容器的第一级UF膜元件预处理后，产水SDI5为2.1，浊度为0.01NTU，预处理后的UF产水直接进入同一压力容器内第二级的NF膜元件，用于有效去除给水中的各种潜在污染离子，含有低盐浓度的第二级NF膜产水（出水中有25mg/L的SO4 2-或400mg/L的总溶解固体含盐量）通过产水口排出；相对应地，含有高盐浓度NF膜浓水从浓水口排出。与现有同规格排列的UF膜压力容器和串联后的三级NF膜元件压力容器所组成的膜过滤系统装置相比，本实用新型所采用的单压力容器中串联有UF膜元件和NF膜元件两个不同类型的过滤单元，有效占地面积和装置质量分别下降47%和28%左右。随着实验运行时间的增加，当跨UF膜压差传感器在线监测到第一支压力容器内UF膜元件两端压差≥0.15MPa时，系统停止第一支压力容器内膜过滤系统的造水程序，启动该压力容器内UF膜元件的反冲洗步骤，反冲洗水流来自第二支和第三支压力容器内UF膜元件的部分产水。反冲洗结束后，通过位于压力容器进口端的定向控制阀用来再次启动正常造水步骤，系统中采用的能量回收装置，将NF浓水中31.5%的能量二次利用用于提升相同膜元件的进水压力。由于第二段NF膜组件的使用，膜过滤系统产水回收率显著增加。When the influent waste liquid containing 500mg/L SO 4 2- and 1000mg/L total dissolved solids salt content passes through the membrane filtration system, a glass steel pressure vessel with a length of 4.7m is used in series with a One-stage UF pretreatment membrane elements and three NF membrane elements. After the feed liquid is pretreated by the first-stage UF membrane elements of three pressure vessels arranged in parallel, the SDI 5 of the produced water is 2.1, and the turbidity is 0.01NTU. The pretreated UF product water directly enters the second-stage NF membrane element in the same pressure vessel to effectively remove various potential pollutant ions in the feed water. The second-stage NF membrane product water with low salt concentration (the effluent has 25mg/L SO 4 2- or 400mg/L total dissolved solids salt content) is discharged through the product water port; correspondingly, the NF membrane concentrated water containing high salt concentration is discharged from the concentrated water port. Compared with the existing membrane filtration system device composed of UF membrane pressure vessels arranged in the same specification and three-stage NF membrane element pressure vessels connected in series, the single pressure vessel adopted in the utility model has UF membrane elements and NF membrane elements connected in series With two different types of filter units, the effective floor area and device quality are reduced by about 47% and 28% respectively. With the increase of the running time of the experiment, when the trans-UF membrane differential pressure sensor monitors online that the pressure difference between the two ends of the UF membrane element in the first pressure vessel is ≥0.15MPa, the system stops the water production of the membrane filtration system in the first pressure vessel program, start the backwash step of the UF membrane element in the pressure vessel, and the backwash water flow comes from part of the produced water of the UF membrane element in the second and third pressure vessels. After the backwash is over, the directional control valve located at the inlet of the pressure vessel is used to restart the normal water generation step. The energy recovery device used in the system uses 31.5% of the energy in the NF concentrated water for secondary use to upgrade the same membrane element. water pressure. Due to the use of the second-stage NF membrane module, the water recovery rate of the membrane filtration system is significantly increased.
实施例2Example 2
当含有包括3000mg/L的SO4 2-和45000mg/L的总溶解固体含盐量的进水废液通过该膜过滤系统时，采用长度为4.7m的玻璃钢材质的压力容器内，依次串联有一级MF预处理膜元件和三支RO膜元件，进水分别通过三支并联排列的压力容器的第一级MF膜元件预处理后，产水SDI5为2.8，浊度为0.01NTU，预处理后的MF膜产水直接进入同一压力容器内第二级的RO膜元件，用于有效去除给水中的各种潜在污染离子，含有低盐浓度的第二级RO膜产水（出水中有40mg/L的SO4 2-或800mg/L的总溶解固体含盐量）通过产水口排出；相对应地，含有高盐浓度RO膜浓水从浓水口排出。与现有同规格排列的MF膜压力容器和串联后的三级RO膜压力容器所组成的膜过滤系统装置相比，本实用新型所采用的单压力容器中串联有MF膜元件和RO膜元件两个不同类型的过滤单元，有效占地面积和装置质量分别下降35%和22%左右。随着实验运行时间的增加，当跨UF膜压差传感器在线监测到第一支压力容器内MF膜元件两端压差≥0.15MPa时，系统停止第一支压力容器内膜过滤系统的造水程序，启动该压力容器内MF膜元件的反冲洗步骤，反冲洗水流来自第二支和第三支压力容器内MF膜元件的部分产水。反冲洗结束后，通过位于压力容器进口端的定向控制阀用来再次启动正常造水步骤，系统中采用的能量回收装置，将RO浓水中92.4%的能量二次利用用于提升相同膜元件的进水压力。When the influent waste liquid containing 3000mg/L SO 4 2- and 45000mg/L total dissolved solids salt content passes through the membrane filtration system, a 4.7m-long glass fiber reinforced plastic pressure vessel is used in series, one One-stage MF pretreatment membrane elements and three RO membrane elements, the influent water passes through the first-stage MF membrane elements of three pressure vessels arranged in parallel. The final MF membrane product water directly enters the second-stage RO membrane element in the same pressure vessel to effectively remove various potential pollutant ions in the feed water. The second-stage RO membrane product water with low salt concentration (40mg in the effluent water) /L of SO 4 2- or 800mg/L total dissolved solids salt content) is discharged through the water production port; correspondingly, RO membrane concentrated water containing high salt concentration is discharged from the concentrated water port. Compared with the existing membrane filtration system device composed of MF membrane pressure vessels arranged in the same specification and three-stage RO membrane pressure vessels connected in series, the single pressure vessel adopted by the utility model has MF membrane elements and RO membrane elements connected in series For two different types of filter units, the effective floor area and device quality are reduced by about 35% and 22% respectively. With the increase of the running time of the experiment, when the trans-UF membrane differential pressure sensor monitors online that the pressure difference across the MF membrane element in the first pressure vessel is ≥0.15MPa, the system stops the water production of the membrane filtration system in the first pressure vessel program, start the backwash step of the MF membrane element in the pressure vessel, and the backwash water flow comes from part of the produced water of the MF membrane element in the second and third pressure vessels. After the backwash is over, the directional control valve located at the inlet of the pressure vessel is used to restart the normal water generation step. The energy recovery device used in the system reutilizes 92.4% of the energy in the RO concentrated water to upgrade the same membrane element. water pressure.
以上显示和描述了本实用新型的基本原理，主要特征和优点，在不脱离本实用新型精神和范围的前提下，本实用新型还有各种变化和改进，这些变化和改进都落入要求保护的本实用新型的范围。The basic principles, main features and advantages of the present utility model have been shown and described above. On the premise of not departing from the spirit and scope of the present utility model, the present utility model also has various changes and improvements, and these changes and improvements all fall into the claims. The scope of the utility model.
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| CN110723784A (en) * | 2019-10-16 | 2020-01-24 | 东莞市鸾江水处理设备工程有限公司 | A kind of waste water treatment and recycling method |
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| CN107824048A (en) * | 2017-11-21 | 2018-03-23 | 河南师范大学 | A kind of sewage-treatment plant and its operation method for improving membrane filtration system performance |
| CN107824048B (en) * | 2017-11-21 | 2024-08-20 | 河南师范大学 | Sewage treatment device for improving performance of membrane filtration system and operation method thereof |
| CN110723784A (en) * | 2019-10-16 | 2020-01-24 | 东莞市鸾江水处理设备工程有限公司 | A kind of waste water treatment and recycling method |
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