CN107804929A - A kind of saliferous industrial sewage process method - Google Patents
A kind of saliferous industrial sewage process method Download PDFInfo
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Abstract
本发明涉及一种含盐工业污水处理方法，包括以下步骤：(1)预处理：将污水送入过滤池去除悬浮物，(2)超滤处理：将步骤(1)所得污水送入外压式超滤系统进行超滤处理，(3)反渗透处理：将步骤(2)所得污水送入反渗透系统，脱除盐分，(4)吹脱处理：将步骤(3)所得反渗透产水送入吹脱塔，经吹脱处理后调节pH满足回用要求。本发明采用多级石英砂过滤池，能够有效去除悬浮物，且不易堵塞，采用外压式超滤系统，系统适应性好，可全流过滤，超滤膜采用中空纤维，强度高，反洗更彻底，膜性能恢复好，采用BW30XFR‑400/34i或PROC10反渗透膜元件，盐分脱除率高，达到98％以上，综合污水回收率高，达到85％以上。The invention relates to a method for treating salty industrial sewage, comprising the following steps: (1) pretreatment: sending the sewage into a filter tank to remove suspended matter; (2) ultrafiltration treatment: sending the sewage obtained in step (1) into an external pressure (3) reverse osmosis treatment: send the sewage obtained in step (2) into the reverse osmosis system to remove salt, (4) blow off treatment: use the reverse osmosis product water obtained in step (3) Send it to the stripping tower, and adjust the pH to meet the recycling requirements after stripping treatment. The invention adopts a multi-stage quartz sand filter tank, which can effectively remove suspended matter and is not easy to be blocked. It adopts an external pressure ultrafiltration system, which has good system adaptability and full-flow filtration. The ultrafiltration membrane adopts hollow fiber, which has high strength and is easy to backwash. More thorough, good recovery of membrane performance, using BW30XFR‑400/34i or PROC10 reverse osmosis membrane elements, high salt removal rate of over 98%, high comprehensive sewage recovery rate of over 85%.
Description
技术领域technical field
本发明涉及污水处理技术领域，具体涉及一种含盐工业污水处理方法。The invention relates to the technical field of sewage treatment, in particular to a method for treating salty industrial sewage.
背景技术Background technique
在人们的观念中，水是取之不尽用之不竭的，但是随着工业化和城镇化的不断推进，人们对水资源的需求大大超过了水资源的存储量，进入新世纪后，很多地方出现了水资源枯竭或污染严重的局面，污水的排放严重污染环境，尤其工业污水的污染问题逐渐引起人们的重视，污水处理再利用成为了节省水资源、减轻环境污染的必经之道。In people's minds, water is inexhaustible, but with the continuous advancement of industrialization and urbanization, people's demand for water resources has greatly exceeded the storage capacity of water resources. After entering the new century, many Local water resources are depleted or seriously polluted. The discharge of sewage seriously pollutes the environment, especially the pollution of industrial sewage has gradually attracted people's attention. Sewage treatment and reuse has become the only way to save water resources and reduce environmental pollution.
按污水来源分类，污水处理一般分为生产污水处理和生活污水处理，生产污水包括工业污水、农业污水和医疗污水等，含盐工业污水处理方法很多，可分为物理法、化学法、生物法和电化学法等，物理法一般采用过滤、沉淀、气浮等方式处理污水，具有装置简单、处理量大等优点，但是目前的物理处理方法处理的水质很难达标，盐分脱除率低，达标污水回收率低，因此需要开发一种新型工业污水物理处理方法，提高污水的回收利用率，减少污水排放，减轻环境污染。According to the classification of sewage sources, sewage treatment is generally divided into production sewage treatment and domestic sewage treatment. Production sewage includes industrial sewage, agricultural sewage and medical sewage, etc. There are many methods for the treatment of salty industrial sewage, which can be divided into physical methods, chemical methods, and biological methods. Physical methods generally use filtration, sedimentation, air flotation and other methods to treat sewage, which have the advantages of simple equipment and large processing capacity. However, the water quality treated by the current physical treatment methods is difficult to meet the standard, and the salt removal rate is low. The recovery rate of up-to-standard sewage is low, so it is necessary to develop a new physical treatment method for industrial sewage to improve the recovery rate of sewage, reduce sewage discharge, and reduce environmental pollution.
发明内容Contents of the invention
本发明的目的在于提供一种含盐工业污水处理方法，用以解决现有工业污水物理处理方法处理污水不达标的问题。The purpose of the present invention is to provide a salt-containing industrial sewage treatment method to solve the problem that the existing industrial sewage physical treatment method does not meet the standard of sewage treatment.
为实现上述目的，本发明的技术方案为：To achieve the above object, the technical solution of the present invention is:
一种含盐工业污水处理方法，包括以下步骤：A method for treating salty industrial sewage, comprising the following steps:
(1)预处理：将污水送入过滤池进行过滤去除悬浮物；(1) Pretreatment: send the sewage into the filter tank for filtration to remove suspended solids;
(2)超滤处理：将步骤(1)预处理后的污水送入外压式超滤系统，出水再经过多介质过滤器去除污水中直径大于10μm的颗粒物，系统适应性好，可全流过滤，自用水率低；(2) Ultrafiltration treatment: send the sewage pretreated in step (1) into an external pressure ultrafiltration system, and then pass through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage. The system has good adaptability and can be used in full flow Filtration, low self-water rate;
(3)反渗透处理：将步骤(2)超滤后的污水送入反渗透系统，脱除盐分，盐分脱除率达到98％以上；(3) Reverse osmosis treatment: send the sewage after the ultrafiltration in step (2) into a reverse osmosis system to remove salinity, and the salinity removal rate reaches more than 98%;
(4)吹脱处理：将步骤(3)所得反渗透产水送入吹脱塔，经吹脱处理后，除去水中的溶解CO2等酸性气体，调节pH满足回用要求；(4) stripping treatment: the reverse osmosis product water obtained in step (3) is sent to the stripping tower, after the stripping treatment, the dissolved CO in the water is removed acid gases such as, and the pH is adjusted to meet the reuse requirements;
进一步地，所述步骤(1)中的过滤池为石英砂过滤池，不但能够有效去除悬浮物，而且不易堵塞，滤池的纳污能力强；Further, the filter tank in the step (1) is a quartz sand filter tank, which not only can effectively remove suspended solids, but also is not easy to be blocked, and the filter tank has a strong dirt-holding capacity;
进一步地，所述石英砂过滤池采用钢筋混凝土结构重力过滤池，填料为多级石英砂；Further, the quartz sand filter tank adopts a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;
进一步地，所述步骤(2)中超滤系统前设置有自清洗过滤器，可以有效去除原水中的异物，防止损坏超滤系统的膜元件；Further, a self-cleaning filter is provided before the ultrafiltration system in the step (2), which can effectively remove foreign matter in the raw water and prevent damage to the membrane elements of the ultrafiltration system;
进一步地，所述自清洗过滤器的过滤精度为50μm，内装不锈钢或铜质过滤网，除去异物效率高，强度高，不易损坏和结垢；Further, the filtration accuracy of the self-cleaning filter is 50 μm, and a stainless steel or copper filter is installed inside, which has high efficiency of removing foreign matter, high strength, and is not easy to be damaged and scaled;
进一步地，所述步骤(2)中的超滤系统的超滤膜采用中空纤维，过滤方式为死端过滤，强度高，反洗更彻底，膜性能恢复好；Further, the ultrafiltration membrane of the ultrafiltration system in the step (2) adopts hollow fibers, and the filtration method is dead-end filtration, which has high strength, more thorough backwashing, and good membrane performance recovery;
进一步地，所述超滤膜的材质为聚碳酸酯、聚氯乙烯、聚偏氟乙烯、聚丙烯腈、聚酰胺、交链的聚乙烯醇或改性丙烯酸聚合物；Further, the material of the ultrafiltration membrane is polycarbonate, polyvinyl chloride, polyvinylidene fluoride, polyacrylonitrile, polyamide, cross-linked polyvinyl alcohol or modified acrylic polymer;
进一步地，所述步骤(3)中反渗透装置采用BW30XFR-400/34i或PROC10反渗透膜元件；Further, the reverse osmosis device in the step (3) adopts BW30XFR-400/34i or PROC10 reverse osmosis membrane elements;
进一步地，所述步骤(3)中反渗透系统进口设置有酸加药装置、还原剂加药装置、非氧化性杀菌剂加药装置和阻垢剂加药装置，酸和阻垢剂可以消除反渗透膜元件内的结垢现象，还原剂可以消除原水中的余氯对膜元件的影响；Further, the inlet of the reverse osmosis system in the step (3) is provided with an acid dosing device, a reducing agent dosing device, a non-oxidative bactericide dosing device and a scale inhibitor dosing device, and the acid and scale inhibitor can eliminate Scaling phenomenon in the reverse osmosis membrane element, the reducing agent can eliminate the influence of residual chlorine in the raw water on the membrane element;
进一步地，所述步骤(3)中的反渗透系统采用两级两段设计或一级两段设计。Further, the reverse osmosis system in the step (3) adopts a two-stage two-stage design or a one-stage two-stage design.
本发明方法具有如下优点：The inventive method has the following advantages:
1.本发明技术可靠，运行成本低，脱盐率高，脱盐率达到98％以上，污水回收率高，达到85％以上。1. The present invention has reliable technology, low operating cost, high desalination rate of over 98%, and high sewage recovery rate of over 85%.
2.本发明的超滤处理环节前置自清洗过滤器，可以有效防止原水中的异物进行超滤装置，对膜元件造成损坏，具有对原水进行过滤并自动对滤网进行清洗排污的功能，采用外压式超滤系统，系统适应性好，可全流过滤，自用水率低，超滤膜采用中空纤维，强度高，反洗更彻底，膜性能恢复好。2. The pre-self-cleaning filter in the ultrafiltration process of the present invention can effectively prevent foreign matter in the raw water from entering the ultrafiltration device and causing damage to the membrane elements, and has the function of filtering the raw water and automatically cleaning the filter screen. The external pressure ultrafiltration system is adopted, the system has good adaptability, full-flow filtration is possible, and the self-water rate is low. The ultrafiltration membrane adopts hollow fiber, which has high strength, more thorough backwashing, and good membrane performance recovery.
3.本发明采用反渗透系统前设置多介质过滤器，可以有效去除10μm以上的颗粒物，有效避免大颗粒污染物进入反渗透系统损坏膜元件，采用BW30XFR-400/34i或PROC10反渗透膜元件，盐分脱除率高，达到98％以上，反渗透装置进口设置有酸加药装置、还原剂加药装置、非氧化性杀菌剂加药装置和阻垢剂加药装置，酸和阻垢剂可以消除反渗透膜元件内的结垢现象，还原剂可以消除原水中的余氯对膜元件的影响。3. The present invention adopts a multi-media filter before the reverse osmosis system, which can effectively remove particles above 10 μm and effectively prevent large particle pollutants from entering the reverse osmosis system to damage the membrane elements. BW30XFR-400/34i or PROC10 reverse osmosis membrane elements are used, The salt removal rate is high, reaching more than 98%. The inlet of the reverse osmosis device is equipped with acid dosing device, reducing agent dosing device, non-oxidative bactericide dosing device and scale inhibitor dosing device. The acid and scale inhibitor can be To eliminate the fouling phenomenon in the reverse osmosis membrane element, the reducing agent can eliminate the influence of residual chlorine in the raw water on the membrane element.
4.本发明采用多级石英砂过滤池，不但能够有效去除悬浮物，而且不易堵塞，滤池的纳污能力强，设置吹脱处理环节，有效地将反渗透水中的CO2等酸性溶解气去除，经调节pH值后可以满足回收再利用需求。4. The present invention adopts a multi-stage quartz sand filter tank, which not only can effectively remove suspended solids, but also is not easy to be clogged. The filter tank has a strong dirt holding capacity, and a blow-off treatment link is set to effectively remove CO2 and other acidic dissolved gases in reverse osmosis water. Removal, after adjusting the pH value can meet the needs of recycling.
具体实施方式Detailed ways
以下实施例用于说明本发明，但不用来限制本发明的范围。The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
实施例1Example 1
一种含盐工业污水处理方法，包括以下步骤：A method for treating salty industrial sewage, comprising the following steps:
(1)预处理：将污水送入石英砂过滤池进行过滤去除悬浮物，所述石英砂过滤池为钢筋混凝土结构重力过滤池，填料为多级石英砂；(1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, and the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;
(2)超滤处理：将步骤(1)预处理后的污水首先送入过滤精度为50μm、内装不锈钢过滤网的自清洗过滤器，再送入外压式超滤系统，所述超滤系统的超滤膜采用聚碳酸酯材质的中空纤维，采用死端过滤方式，出水再经过多介质过滤器去除污水中直径大于10μm的颗粒物；(2) Ultrafiltration treatment: the sewage after the pretreatment of step (1) is first sent into a self-cleaning filter with a filtration precision of 50 μm and a built-in stainless steel filter screen, and then sent into an external pressure ultrafiltration system. The ultrafiltration membrane is made of polycarbonate hollow fiber, adopts dead-end filtration method, and the effluent is then passed through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;
(3)反渗透处理：将步骤(2)超滤后的污水送入两级两段式反渗透系统，所述反渗透系统采用BW30XFR-400/34i反渗透膜元件，所述反渗透系统进口设置有酸加药装置、还原剂加药装置、非氧化性杀菌剂加药装置和阻垢剂加药装置；(3) Reverse osmosis treatment: send the sewage after the ultrafiltration in step (2) into a two-stage two-stage reverse osmosis system, the reverse osmosis system adopts BW30XFR-400/34i reverse osmosis membrane elements, It is equipped with acid dosing device, reducing agent dosing device, non-oxidizing bactericide dosing device and scale inhibitor dosing device;
(4)吹脱处理：将步骤(3)所得反渗透产水送入吹脱塔，经吹脱处理后调节pH值满足回用要求。(4) Stripping treatment: the reverse osmosis product water obtained in step (3) is sent to the stripping tower, and after the stripping treatment, the pH value is adjusted to meet the reuse requirement.
实施例2Example 2
一种含盐工业污水处理方法，包括以下步骤：A method for treating salty industrial sewage, comprising the following steps:
(1)预处理：将污水送入石英砂过滤池进行过滤去除悬浮物，所述石英砂过滤池为钢筋混凝土结构重力过滤池，填料为多级石英砂；(1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, and the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;
(2)超滤处理：将步骤(1)预处理后的污水首先送入过滤精度为50μm、内装铜质过滤网的自清洗过滤器，再送入外压式超滤系统，所述超滤系统的超滤膜采用聚氯乙烯材质的中空纤维，采用死端过滤方式，出水再经过多介质过滤器去除污水中直径大于10μm的颗粒物；(2) Ultrafiltration treatment: the sewage pretreated in step (1) is first sent to a self-cleaning filter with a filtration accuracy of 50 μm and a built-in copper filter screen, and then sent to an external pressure ultrafiltration system. The ultrafiltration membrane adopts hollow fiber made of polyvinyl chloride, adopts dead-end filtration method, and the effluent passes through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;
(3)反渗透处理：将步骤(2)超滤后的污水送入一级两段式反渗透系统，所述反渗透系统采用PROC10反渗透膜元件，所述反渗透系统进口设置有酸加药装置、还原剂加药装置、非氧化性杀菌剂加药装置和阻垢剂加药装置；(3) Reverse osmosis treatment: send the sewage after step (2) ultrafiltration into a first-stage two-stage reverse osmosis system, the reverse osmosis system adopts PROC10 reverse osmosis membrane elements, and the inlet of the reverse osmosis system is provided with an acid adding Dosing device, reducing agent dosing device, non-oxidizing fungicide dosing device and antiscalant dosing device;
(4)吹脱处理：将步骤(3)所得反渗透产水送入吹脱塔，经吹脱处理后调节pH值满足回用要求。(4) Stripping treatment: the reverse osmosis product water obtained in step (3) is sent to the stripping tower, and after the stripping treatment, the pH value is adjusted to meet the reuse requirement.
实施例3Example 3
一种含盐工业污水处理方法，包括以下步骤：A method for treating salty industrial sewage, comprising the following steps:
(1)预处理：将污水送入石英砂过滤池进行过滤去除悬浮物，所述石英砂过滤池为钢筋混凝土结构重力过滤池，填料为多级石英砂；(1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, and the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;
(2)超滤处理：将步骤(1)预处理后的污水首先送入过滤精度为50μm、内装不锈钢过滤网的自清洗过滤器，再送入外压式超滤系统，所述超滤系统的超滤膜采用聚偏氟乙烯材质的中空纤维，采用死端过滤方式，出水再经过多介质过滤器去除污水中直径大于10μm的颗粒物；(2) Ultrafiltration treatment: the sewage after the pretreatment of step (1) is first sent into a self-cleaning filter with a filtration precision of 50 μm and a built-in stainless steel filter screen, and then sent into an external pressure ultrafiltration system. The ultrafiltration membrane is made of hollow fiber made of polyvinylidene fluoride, and adopts the dead-end filtration method, and the effluent is then passed through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;
(3)反渗透处理：将步骤(2)超滤后的污水送入两级两段式反渗透系统，所述反渗透系统采用BW30XFR-400/34i反渗透膜元件，所述反渗透系统进口设置有酸加药装置、还原剂加药装置、非氧化性杀菌剂加药装置和阻垢剂加药装置；(3) Reverse osmosis treatment: send the sewage after the ultrafiltration in step (2) into a two-stage two-stage reverse osmosis system, the reverse osmosis system adopts BW30XFR-400/34i reverse osmosis membrane elements, It is equipped with acid dosing device, reducing agent dosing device, non-oxidizing bactericide dosing device and scale inhibitor dosing device;
(4)吹脱处理：将步骤(3)所得反渗透产水送入吹脱塔，经吹脱处理后调节pH值满足回用要求。(4) Stripping treatment: the reverse osmosis product water obtained in step (3) is sent to the stripping tower, and after the stripping treatment, the pH value is adjusted to meet the reuse requirement.
实施例4Example 4
一种含盐工业污水处理方法，包括以下步骤：A method for treating salty industrial sewage, comprising the following steps:
(1)预处理：将污水送入石英砂过滤池进行过滤去除悬浮物，所述石英砂过滤池为钢筋混凝土结构重力过滤池，填料为多级石英砂；(1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, and the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;
(2)超滤处理：将步骤(1)预处理后的污水首先送入过滤精度为50μm、内装铜质过滤网的自清洗过滤器，再送入外压式超滤系统，所述超滤系统的超滤膜采用聚丙烯腈材质的中空纤维，采用死端过滤方式，出水再经过多介质过滤器去除污水中直径大于10μm的颗粒物；(2) Ultrafiltration treatment: the sewage pretreated in step (1) is first sent to a self-cleaning filter with a filtration accuracy of 50 μm and a built-in copper filter screen, and then sent to an external pressure ultrafiltration system. The ultrafiltration membrane adopts the hollow fiber made of polyacrylonitrile, adopts the dead-end filtration method, and the effluent passes through the multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;
(3)反渗透处理：将步骤(2)超滤后的污水送入两级两段式反渗透系统，所述反渗透系统采用BW30XFR-400/34i反渗透膜元件，所述反渗透系统进口设置有酸加药装置、还原剂加药装置、非氧化性杀菌剂加药装置和阻垢剂加药装置；(3) Reverse osmosis treatment: send the sewage after the ultrafiltration in step (2) into a two-stage two-stage reverse osmosis system, the reverse osmosis system adopts BW30XFR-400/34i reverse osmosis membrane elements, It is equipped with acid dosing device, reducing agent dosing device, non-oxidizing bactericide dosing device and scale inhibitor dosing device;
(4)吹脱处理：将步骤(3)所得反渗透产水送入吹脱塔，经吹脱处理后调节pH值满足回用要求。(4) Stripping treatment: the reverse osmosis product water obtained in step (3) is sent to the stripping tower, and after the stripping treatment, the pH value is adjusted to meet the reuse requirement.
实施例5Example 5
一种含盐工业污水处理方法，包括以下步骤：A method for treating salty industrial sewage, comprising the following steps:
(1)预处理：将污水送入石英砂过滤池进行过滤去除悬浮物，所述石英砂过滤池为钢筋混凝土结构重力过滤池，填料为多级石英砂；(1) Pretreatment: sewage is sent to a quartz sand filter tank to filter and remove suspended matter, and the quartz sand filter tank is a reinforced concrete structure gravity filter tank, and the filler is multi-stage quartz sand;
(2)超滤处理：将步骤(1)预处理后的污水首先送入过滤精度为50μm、内装不锈钢过滤网的自清洗过滤器，再送入外压式超滤系统，所述超滤系统的超滤膜采用聚酰胺材质的中空纤维，采用死端过滤方式，出水再经过多介质过滤器去除污水中直径大于10μm的颗粒物；(2) Ultrafiltration treatment: the sewage after the pretreatment of step (1) is first sent into a self-cleaning filter with a filtration precision of 50 μm and a built-in stainless steel filter screen, and then sent into an external pressure ultrafiltration system. The ultrafiltration membrane is made of polyamide hollow fiber, adopts dead-end filtration method, and the effluent passes through a multimedia filter to remove particles with a diameter greater than 10 μm in the sewage;
(3)反渗透处理：将步骤(2)超滤后的污水送入一级两段式反渗透系统，所述反渗透系统采用PROC10反渗透膜元件，所述反渗透系统进口设置有酸加药装置、还原剂加药装置、非氧化性杀菌剂加药装置和阻垢剂加药装置；(3) Reverse osmosis treatment: send the sewage after step (2) ultrafiltration into a first-stage two-stage reverse osmosis system, the reverse osmosis system adopts PROC10 reverse osmosis membrane elements, and the inlet of the reverse osmosis system is provided with an acid adding Dosing device, reducing agent dosing device, non-oxidizing fungicide dosing device and antiscalant dosing device;
(4)吹脱处理：将步骤(3)所得反渗透产水送入吹脱塔，经吹脱处理后调节pH值满足回用要求。(4) Stripping treatment: the reverse osmosis product water obtained in step (3) is sent to the stripping tower, and after the stripping treatment, the pH value is adjusted to meet the reuse requirements.
虽然，上文中已经用一般性说明及具体实施例对本发明作了详尽的描述，但在本发明基础上，可以对之作一些修改或改进，这对本领域技术人员而言是显而易见的。因此，在不偏离本发明精神的基础上所做的这些修改或改进，均属于本发明要求保护的范围。Although the present invention has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.
Claims (10)
- A kind of 1. saliferous industrial sewage process method, it is characterised in that：The saliferous industrial sewage process method includes following step Suddenly：(1) pre-process：Sewage is sent into filtering ponds and carries out filter and remove suspended substances；(2) hyperfiltration treatment：The pretreated sewage of step (1) is sent into external-compression type ultrafiltration system, multimedium mistake is passed through in water outlet again Filter removes the particulate matter that diameter in sewage is more than 10 μm；(3) reverse-osmosis treated：Sewage after step (2) hyperfiltration treatment is sent into counter-infiltration system, removes salinity；(4) stripping is handled：Reverse osmosis produced water obtained by step (3) is sent into stripping tower, pH is adjusted after stripping is handled and meets reuse It is required that.
- 2. saliferous industrial sewage process method according to claim 1, it is characterised in that：Filtering in the step (1) Pond is quartz sand filter tank.
- 3. saliferous industrial sewage process method according to claim 2, it is characterised in that：The quartz sand filter tank uses Reinforced concrete structure gravity filter tank, filler are multistage quartz sand.
- 4. saliferous industrial sewage process method according to claim 1, it is characterised in that：Ultrafiltration system in the step (2) Self-cleaning filter is provided with before system.
- 5. saliferous industrial sewage process method according to claim 4, it is characterised in that：The mistake of the self-cleaning filter It is 50 μm to filter precision, built-in stainless steel or copper screen pack.
- 6. saliferous industrial sewage process method according to claim 1, it is characterised in that：Ultrafiltration in the step (2) The milipore filter of system uses doughnut, and filter type is dead-end filtration.
- 7. saliferous industrial sewage process method according to claim 6, it is characterised in that：The material of the milipore filter is poly- Carbonic ester, polyvinyl chloride, Kynoar, polyacrylonitrile, polyamide, the polyvinyl alcohol or modified acrylic polymer of interlinkage.
- 8. saliferous industrial sewage process method according to claim 1, it is characterised in that：Counter-infiltration in the step (3) Device uses BW30XFR-400/34i or PROC10 reverse-osmosis membrane elements.
- 9. saliferous industrial sewage process method according to claim 1, it is characterised in that：Counter-infiltration in the step (3) System inlets are provided with sour chemicals dosing plant, reducing agent chemicals dosing plant, non oxidizing bactericide chemicals dosing plant and antisludging agent dosing dress Put.
- 10. saliferous industrial sewage process method according to claim 1, it is characterised in that：Reverse osmosis in the step (3) Permeable system is using two sections of designs of two sections of designs of two-stage or one-level.
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