CN105668923B - A kind of tin plating waste water water cleaning systems and process for purifying water - Google Patents

A kind of tin plating waste water water cleaning systems and process for purifying water Download PDF

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CN105668923B
CN105668923B CN201610026020.5A CN201610026020A CN105668923B CN 105668923 B CN105668923 B CN 105668923B CN 201610026020 A CN201610026020 A CN 201610026020A CN 105668923 B CN105668923 B CN 105668923B
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resin
particle electrode
type particle
tin
electrode layer
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CN105668923A (en
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冯岩
巩玉帅
于衍真
宋亭
李雪
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University of Jinan
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • 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
    • C02F1/42Treatment of water, waste water, or sewage by ion-exchange
    • 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
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/467Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
    • C02F1/4672Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
    • 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
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • 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
    • C02F1/42Treatment of water, waste water, or sewage by ion-exchange
    • C02F2001/425Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/16Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/02Aerobic processes

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Ion Exchange (AREA)
  • Biological Treatment Of Waste Water (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

本发明公开了一种镀锡废水净水系统及净水方法。镀锡废水净水系统的树脂型粒子电极层位于净水系统的顶部,并在树脂内部放置由钛网构成的阴极,在树脂外部放置由不锈钢孔板构成的阳极,阳极和阴极分别与外加电源的正极和负极相连,吸附性生物滤料层位于树脂型粒子电极层的下方,吸附性生物滤料层下方安装有曝气装置和反冲洗装置。本发明的净水方法,包括如下步骤:(1)污水进入树脂型粒子电极层上部;(2)通过曝气装置曝气(3)树脂型粒子电极处理;(4)微生物处理以及物理过滤;(5)出净水。本发明的净水系统先以树脂型粒子电极催化氧化镀锡废水中的难生物降解有机物,提高镀锡废水可生化性,再经微生物处理后排出,解决了镀锡废水难处理的问题。

The invention discloses a tinning waste water purification system and a water purification method. The resin-type particle electrode layer of the tin-plated wastewater purification system is located on the top of the water purification system, and a cathode made of titanium mesh is placed inside the resin, and an anode made of stainless steel orifice is placed outside the resin. The anode and cathode are connected to the external power supply respectively. The positive and negative electrodes are connected, the adsorption biological filter layer is located under the resin particle electrode layer, and an aeration device and a backwashing device are installed under the adsorption biological filter layer. The water purification method of the present invention comprises the following steps: (1) sewage enters the upper part of the resin-type particle electrode layer; (2) aeration through an aeration device; (3) resin-type particle electrode treatment; (4) microbial treatment and physical filtration; (5) Out of clean water. The water purification system of the present invention first catalyzes and oxidizes the refractory organic matter in the tin-plating wastewater by using the resin-type particle electrode to improve the biodegradability of the tin-plating wastewater, and then discharges the tin-plating wastewater after being treated by microorganisms, thereby solving the problem that the tin-plating wastewater is difficult to handle.

Description

一种镀锡废水净水系统及净水方法A tinning wastewater purification system and water purification method

技术领域technical field

本发明属于废水处理技术领域,特别是涉及一种可用于废水处理的镀锡废水净水系统和净水方法。The invention belongs to the technical field of wastewater treatment, and in particular relates to a tin-plating wastewater purification system and a water purification method which can be used for wastewater treatment.

背景技术Background technique

镀锡工艺因具有通用性强,适用面广等特点,在工业生产中得到广泛应用,由此产生的镀锡废水也大量增加。镀锡废水是镀锡工业生产过程中产生的含金属离子和部分有机物的混合废水,如果任其自由排放,将对自然生态环境及人类健康构成严重的潜在风险。镀锡废水中含有的大量重金属离子,对动植物表现出强烈的毒性,直接排放到环境中,不仅会对生态环境造成难以修复的污染,而且有毒物质会通过食物链的富集作用,逐渐对人的健康产生危害。The tin plating process has been widely used in industrial production because of its versatility and wide application range, and the resulting tin plating wastewater has also increased significantly. Tin plating wastewater is a mixed wastewater containing metal ions and some organic matter produced in the process of tin plating industry. If it is allowed to discharge freely, it will pose serious potential risks to the natural ecological environment and human health. A large amount of heavy metal ions contained in tin-plating wastewater show strong toxicity to animals and plants. Direct discharge into the environment will not only cause irreparable pollution to the ecological environment, but also toxic substances will gradually affect human beings through the enrichment of the food chain. health hazard.

随着镀锡工艺复杂程度的增加以及镀锡工艺中大量难降解有机物的使用,导致镀锡废水的处理难度也越来越大,传统的污水处理方法难以对其进行有效的处理。再加上与之相关的废水排放标准不断提高,大部分现有镀锡废水处理工艺已无法顺利使其达标排放。因此对已有镀锡废水处理工艺进行升级已经到了势在必行的阶段。With the increasing complexity of the tin plating process and the use of a large number of refractory organic substances in the tin plating process, the treatment of tin plating wastewater is becoming more and more difficult, and traditional sewage treatment methods are difficult to effectively treat it. Coupled with the continuous improvement of related wastewater discharge standards, most of the existing tin-plating wastewater treatment processes have been unable to make them discharge smoothly. Therefore, it is imperative to upgrade the existing tin plating wastewater treatment process.

本发明通过树脂型粒子电极处理技术,提高废水BOD/COD的值,使大部分难生物降解的污染物能够转化为易被微生物氧化分解的物质,之后通过吸附型生物滤料层进行生物处理,达到增强处理效果的目的,从而提高污水中污染物质的去除效率,降低设备投资,占地面积小,易于就地安装。The present invention improves the BOD/COD value of wastewater through the resin-type particle electrode treatment technology, so that most of the refractory biodegradable pollutants can be converted into substances that are easily oxidized and decomposed by microorganisms, and then biological treatment is carried out through the adsorption-type biological filter material layer, The purpose of enhancing the treatment effect is achieved, thereby improving the removal efficiency of pollutants in sewage, reducing equipment investment, occupying a small area, and being easy to install on site.

发明内容Contents of the invention

本发明的目的在于解决现有废水处理工艺对镀锡废水处理效果不佳的问题,提供了一种镀锡废水净水系统及净水方法。The purpose of the present invention is to solve the problem that the existing wastewater treatment process has poor treatment effect on tin-plating wastewater, and provides a tin-plating wastewater purification system and a water purification method.

为解决上述问题,本发明包括树脂型粒子电极层、吸附型生物滤料层,树脂型粒子电极层填充具有离子交换作用的阳离子树脂型粒子电极,吸附型生物滤料层填充为沸石,树脂型粒子电极层、吸附型生物滤料层串联由上至下组合在一个反应器内;其中树脂型粒子电极层外部接有直流电源,直流电源通过阴极线、阳极线分别和树脂型粒子电极层内部的钛网、外部的不锈钢孔板电极相连,在外电场的基础上实现对镀锡废水重金属离子交换以及电催化氧化有机物、提高废水可生化性的目的;吸附型生物滤料层填充的沸石表面具有降解耐毒性的微生物群落,从而提高了镀锡废水处理效率;吸附型生物滤料层底部设有曝气盘、曝气管、反冲洗进水管,空气压缩机和曝气管连接,反冲洗水泵和反冲洗进水管连接,从而实现镀锡废水净水系统和净水方法曝气、配水以及反冲洗功能。In order to solve the above problems, the present invention includes a resin-type particle electrode layer and an adsorption-type biological filter material layer. The resin-type particle electrode layer is filled with a cationic resin-type particle electrode with ion exchange function, and the adsorption-type biological filter material layer is filled with zeolite. The particle electrode layer and the adsorption-type biological filter material layer are combined in series from top to bottom in a reactor; the resin-type particle electrode layer is externally connected to a DC power supply, and the DC power supply is connected to the inside of the resin-type particle electrode layer through the cathode line and the anode line respectively. The titanium mesh and the external stainless steel orifice plate electrodes are connected to achieve the purpose of ion exchange of heavy metals in tin-plating wastewater and electrocatalytic oxidation of organic matter on the basis of an external electric field to improve the biodegradability of wastewater; the surface of zeolite filled with an adsorption biological filter layer has Degrade the toxicity-resistant microbial community, thereby improving the treatment efficiency of tin-plating wastewater; the bottom of the adsorption biological filter layer is equipped with an aeration pan, aeration pipe, backwash water inlet pipe, air compressor and aeration pipe connection, backwash water pump It is connected with the backwash water inlet pipe to realize the aeration, water distribution and backwash functions of the tinplate wastewater purification system and water purification method.

所述的树脂型粒子电极层,填充预处理后负载了Fe3+的强酸型阳离子交换树脂,预处理方法如下,先将普通强酸型阳离子交换树脂用去离子水清洗,然后用丙酮清洗三到四次,再用去离子水清洗,达到去除杂质的目的,之后将清洗好的强酸型阳离子交换树脂以树脂体积:溶液体积为1:10的比例放入FeCl3溶液中浸泡24小时,以达到负载Fe3+的目的,最后把负载了Fe3+离子的强酸型阳离子交换树脂从FeCl3溶液中取出,再次用去离子水清洗后放入温度为373K的环境中烘干即可完成对树脂的预处理。在树脂内部放置由钛网构成的阳极,在树脂外部放置由不锈钢孔板构成的阴极,阳极和阴极分别与外加电源的正极和负极相连,强酸型阳离子交换树脂、阴极和阳极三部分共同组成树脂型粒子电极层。吸附性生物滤料层位于树脂型粒子电极层的下方,经树脂型粒子电极层处理后的水通过塑料孔板从吸附型生物滤料顶部进入,经微生物处理后由反应器底部排出。The resin-type particle electrode layer is filled with strong-acid cation-exchange resin loaded with Fe3+ after pretreatment. The pre-treatment method is as follows. First, the ordinary strong-acid cation-exchange resin is cleaned with deionized water, and then washed three to four times with acetone , and then washed with deionized water to achieve the purpose of removing impurities, and then put the cleaned strong acid cation exchange resin into the FeCl 3 solution with a ratio of resin volume: solution volume of 1:10 and soak for 24 hours to achieve the purpose of loading Fe 3+ , finally take out the strong acid cation exchange resin loaded with Fe 3+ ions from the FeCl 3 solution, wash it again with deionized water, and dry it in an environment with a temperature of 373K to complete the pretreatment of the resin. deal with. An anode made of titanium mesh is placed inside the resin, and a cathode made of stainless steel orifice is placed outside the resin. The anode and the cathode are respectively connected to the positive and negative electrodes of the external power supply. The strong acid cation exchange resin, the cathode and the anode form the resin together. type particle electrode layer. The adsorption biological filter material layer is located below the resin particle electrode layer, and the water treated by the resin particle electrode layer enters from the top of the adsorption biological filter material through the plastic orifice plate, and is discharged from the bottom of the reactor after being treated by microorganisms.

所述的吸附型生物滤料层与树脂型粒子电极层由下而上串联在同一反应器中,反应器整体为圆柱型,树脂型粒子电极层装充阳离子交换树脂形成的树脂型粒子电极,高度300mm,吸附型生物滤料层装充3-5mm沸石,高度700mm,树脂型粒子电极层和吸附型生物滤料层直径形同。The adsorption-type biological filter material layer and the resin-type particle electrode layer are connected in series in the same reactor from bottom to top. The reactor is a cylindrical shape as a whole, and the resin-type particle electrode layer is filled with a resin-type particle electrode formed by cation exchange resin. The height is 300mm, the adsorption type biological filter material layer is filled with 3-5mm zeolite, the height is 700mm, the diameter of the resin particle electrode layer and the adsorption type biological filter material layer are the same.

所述的吸附性生物滤料层底部安装有反冲洗进水管、曝气管和曝气盘,反冲洗水泵和反冲洗进水管连接,空气压缩机和曝气管连接,曝气盘安装在曝气管上。The backwash water inlet pipe, aeration pipe and aeration pan are installed at the bottom of the adsorption biological filter material layer, the backwash water pump is connected to the backwash water inlet pipe, the air compressor is connected to the aeration pipe, and the aeration pan is installed on the aeration pan. on the trachea.

一种采用上述所述的一种镀锡废水净水方法,包括如下步骤:(1)高位水箱内的污水经过计量泵计量,进入树脂型粒子电极层上部;(2)向曝气盘通入压缩空气,控制气水体积比为4:1到2:1;(3)废水经过钛网进入树脂型粒子电极层;(4)在树脂型粒子电极层的两端的不锈钢孔板和钛网通过阳极线、阴极线与直流电源的正极和负极相连,为树脂型粒子电极层提供所需的电场;(5)污水经过塑料孔板进入吸附型生物滤料层;(6)经吸附型生物滤料层处理后的水经出水管排出;(7)运行一段时间后对镀锡废水净水系统进行反冲洗,先气洗3分钟,然后同时水洗和气洗5分钟,再水洗8分钟。A method for purifying tinned wastewater as described above, comprising the following steps: (1) The sewage in the high-level water tank is metered by a metering pump and enters the upper part of the resin-type particle electrode layer; Compressed air to control the air-water volume ratio from 4:1 to 2:1; (3) Wastewater enters the resin-type particle electrode layer through the titanium mesh; (4) The stainless steel orifice plate and titanium mesh at both ends of the resin-type particle electrode layer pass through The anode line and the cathode line are connected to the positive and negative poles of the DC power supply to provide the required electric field for the resin-type particle electrode layer; (5) The sewage enters the adsorption-type biological filter material layer through the plastic orifice plate; (6) The adsorption-type biological filter The treated water of the material layer is discharged through the outlet pipe; (7) After running for a period of time, backwash the tin-plating wastewater purification system, first air washing for 3 minutes, then water washing and air washing for 5 minutes at the same time, and then water washing for 8 minutes.

本发明的有益效果:在树脂型粒子电极的作用下提高废水BOD/COD的值,增加其可生化性,然后通过生物处理去除废水中的污染物,从而提高镀锡废水COD的去除率,并且可以有效去除废水中的重金属。Beneficial effects of the present invention: under the action of the resin type particle electrode, the value of BOD/COD of the wastewater is increased, and its biodegradability is increased, and then the pollutants in the wastewater are removed by biological treatment, thereby improving the COD removal rate of the tin-plating wastewater, and Can effectively remove heavy metals in wastewater.

附图说明Description of drawings

图1为本发明一种镀锡废水净水系统示意图。Fig. 1 is a schematic diagram of a tin-plating wastewater purification system according to the present invention.

图1中:1 直流电源; 2 阳极线; 3 阴极线; 4树脂型粒子电极层; 5 吸附型生物滤料层; 6 反冲洗进水管; 7 空气压缩机; 8 反冲洗进水; 9 反冲洗水泵; 10 进水计量泵; 11 进水蠕动泵; 12 曝气管; 13 出水管; 14 取水(料)样口; 15 污水箱; 16 不锈钢孔板电极; 17 钛网; 18 曝气盘; 19 污水管; 20 溢流管; 21 塑料孔板。In Fig. 1: 1. DC power supply; 2. Anode wire; 3. Cathode wire; 4. Resin type particle electrode layer; Rinsing water pump; 10 Inlet metering pump; 11 Inlet peristaltic pump; 12 Aeration pipe; 13 Outlet pipe; 14 Water (material) sampling port; 15 Sewage tank; ; 19 sewage pipe; 20 overflow pipe; 21 plastic orifice.

具体实施方式Detailed ways

实施例一:附图为本发明 的一种具体实施例,该实施例包括污水箱15中的污水通过污水计量泵10经污水管19到达树脂型粒子电极层4上部,污水进入树脂型粒子电极层4内,树脂型粒子电极层4外部有直流电源1,直流电源1通过阴极线3、阳极线2分别和树脂型粒子电极层4内部的钛网18、树脂型粒子电极层4外部的不锈钢孔板电极17连接,在强酸型阳离子交换树脂区域产生电场,使树脂颗粒形成树脂型粒子电极,经树脂型粒子电极层4处理过的水经过塑料孔板21进入吸附型生物滤料层5,污水经吸附型生物滤料层5处理后通过出水管13排出,在吸附性生物滤料外部沿竖直方向等距分布有取水(料)样口15,以便随时观测吸附型生物滤料层5不同位置水质的变化,吸附型生物滤料层5设有曝气盘19、曝气管12,曝气盘19通过曝气管12与空气压缩机7相连,组成曝气系统,为树脂型粒子电极和微生物提供所需氧气,反冲洗进水管6与反冲洗水泵9相连。Embodiment 1: the accompanying drawing is a specific embodiment of the present invention, this embodiment includes that the sewage in the sewage tank 15 reaches the upper part of the resin-type particle electrode layer 4 through the sewage metering pump 10 through the sewage pipe 19, and the sewage enters the resin-type particle electrode In the layer 4, there is a DC power supply 1 outside the resin-type particle electrode layer 4, and the DC power supply 1 passes through the cathode wire 3 and the anode wire 2 and the titanium mesh 18 inside the resin-type particle electrode layer 4 and the stainless steel wire outside the resin-type particle electrode layer 4 respectively. The orifice plate electrode 17 is connected, and an electric field is generated in the strong acid type cation exchange resin region, so that the resin particles form a resin type particle electrode, and the water treated by the resin type particle electrode layer 4 enters the adsorption type biological filter material layer 5 through the plastic orifice plate 21, Sewage is discharged through the outlet pipe 13 after being treated by the adsorption type biological filter material layer 5, and there are water (material) sampling ports 15 distributed equidistantly along the vertical direction outside the adsorption type biological filter material layer, so as to observe the adsorption type biological filter material layer 5 at any time Changes in water quality at different locations, the adsorption type biological filter material layer 5 is provided with an aeration pan 19 and an aeration tube 12, and the aeration pan 19 is connected to the air compressor 7 through the aeration tube 12 to form an aeration system, which is resin-type particles The electrodes and microorganisms provide the required oxygen, and the backwash water inlet pipe 6 is connected with the backwash water pump 9 .

将污水箱15中的污水通过污水计量泵10经污水管19树脂型粒子电极层4上部,吸附型生物滤料层5底部设有曝气盘18、曝气管12,曝气盘18通过曝气管12与空气压缩机7相连,组成曝气系统,为树脂型粒子电极和微生物提供所需氧气,污水进入树脂型粒子电极层4内,树脂型粒子电极层所用的填料为经过预处理的强酸型阳离子交换树脂,高0.3米,经树脂型粒子电极层4处理过的水经过塑料孔板21进入吸附型生物滤料层5,吸附型生物滤料层填充沸石,高0.7米,污水经吸附型生物滤料层5处理后通过出水管13排出,水损增大到一定程度后,需要对新型镀锡废水处理装置进行反冲洗,反冲洗时先停止污水流入后,由空气压缩机7进行气洗,然后打开反冲洗水泵9加压对新型镀锡废水处理装置进行气水联合冲洗,之后关闭空气压缩机7,再用反冲洗水泵9加压对新型镀锡废水处理装置进行水洗,反冲洗的水经溢流管20排出。The sewage in the sewage tank 15 is passed through the sewage metering pump 10 through the sewage pipe 19 to the upper part of the resin type particle electrode layer 4, and the bottom of the adsorption type biological filter material layer 5 is provided with an aeration pan 18 and an aeration pipe 12, and the aeration pan 18 passes through the aeration The air pipe 12 is connected with the air compressor 7 to form an aeration system to provide the required oxygen for the resin-type particle electrode and microorganisms. The sewage enters the resin-type particle electrode layer 4, and the filler used in the resin-type particle electrode layer is pretreated Strong-acid cation exchange resin, 0.3 meters high, the water treated by the resin-type particle electrode layer 4 enters the adsorption-type biological filter material layer 5 through the plastic orifice plate 21, and the adsorption-type biological filter material layer is filled with zeolite, with a height of 0.7 meters. After the adsorption type biological filter material layer 5 is treated, it is discharged through the outlet pipe 13. After the water loss increases to a certain extent, it is necessary to backwash the new tin-plated wastewater treatment device. Carry out air washing, then turn on the backwash water pump 9 to pressurize the new tin-plated wastewater treatment device to perform combined air-water flushing, then close the air compressor 7, and then use the backwash water pump 9 to pressurize the new tin-plated wastewater treatment device. The backwashed water is discharged through the overflow pipe 20.

采用上述一种镀锡废水净水方法包括如下步骤:(1)进水水力负荷为6m3/m2·h,经过计量泵10计量,进入树脂型粒子电极层上部;(2)向曝气盘12通入压缩空气,控制空气压缩机7的压力为0.7MPa,气水比为4:1;(3)废水经过钛网12进入树脂型粒子电极层4;(4)在树脂型粒子电极层4外部的不锈钢孔板电极16和内部钛网17通过阳极线2、阴极线3与直流电源1的正极和负极相连,为树脂型粒子电极层4提供所需的电场;(5)污水经过不锈钢孔板电极16进入吸附型生物滤料层5;(6)经吸附型生物滤料层5处理后的水经出水管13排出;(7)运行一段时间后对镀锡废水净水系统进行反冲洗,先气洗3分钟,然后同时水洗和气洗5分钟,再水洗8分钟。The method for purifying tin-plated wastewater includes the following steps: (1) The hydraulic load of the incoming water is 6m 3 /m 2 ·h, which is metered by the metering pump 10 and enters the upper part of the resin-type particle electrode layer; (2) Aeration The disk 12 is fed with compressed air, and the pressure of the air compressor 7 is controlled to 0.7MPa, and the air-water ratio is 4:1; (3) the waste water enters the resin-type particle electrode layer 4 through the titanium mesh 12; (4) the resin-type particle electrode The stainless steel orifice electrode 16 on the outside of the layer 4 and the internal titanium mesh 17 are connected to the positive and negative electrodes of the DC power supply 1 through the anode wire 2 and the cathode wire 3 to provide the required electric field for the resin particle electrode layer 4; (5) the sewage passes through The stainless steel orifice electrode 16 enters the adsorption type biological filter material layer 5; (6) The water treated by the adsorption type biological filter material layer 5 is discharged through the outlet pipe 13; (7) After a period of operation, the tinned wastewater purification system is For backwashing, first air wash for 3 minutes, then water wash and air wash for 5 minutes at the same time, and then water wash for 8 minutes.

实施例二:本具体实施例的镀锡废水净水系统与具体实施例一的镀锡废水净水系统相同。Embodiment 2: The tin-plating wastewater purification system of this specific embodiment is the same as the tin-plating wastewater purification system of specific embodiment 1.

本净水方法与具体实施例一净水方法区别在于:曝气的气水体积比为3:1。The difference between this water purification method and the water purification method in Embodiment 1 is that the air-to-water volume ratio of the aeration is 3:1.

实施例三:本具体实施例的镀锡废水净水系统与具体实施例一的镀锡废水净水系统相同。Embodiment 3: The tin-plating waste water purification system of this specific embodiment is the same as the tin-plating waste water purification system of specific embodiment 1.

本净水方法与具体实施例一净水方法区别在于:曝气的气水体积比为2:1。The difference between this water purification method and the specific embodiment 1 water purification method is that the air-to-water volume ratio of the aeration is 2:1.

Claims (1)

1.一种镀锡废水净水系统,其特征在于:包括树脂型粒子电极层(4)、吸附型生物滤料层(5),树脂型粒子电极层(4)填充具有离子交换作用的阳离子树脂型粒子电极,吸附型生物滤料层(5)填充为沸石,树脂型粒子电极层(4)、吸附型生物滤料层(5)串联由上至下组合在一个反应器内;其中树脂型粒子电极层(4)外部接有直流电源(1),直流电源通过阴极线(3)、阳极线(2)分别和树脂型粒子电极层(4)内部的钛网(17)、外部的不锈钢孔板电极(16)相连,在外电场的基础上实现对镀锡废水重金属离子交换以及电催化氧化有机物、提高废水可生化性的目的;吸附型生物滤料层(5)填充的沸石表面具有降解耐毒性的微生物群落,从而提高了镀锡废水处理效率;吸附型生物滤料层(5)底部设有曝气盘(18)、曝气管(12)、反冲洗进水管(6),空气压缩机(7)和曝气管(12)连接,反冲洗水泵(9)和反冲洗进水管(6)连接,从而实现镀锡废水净水系统和净水方法曝气、配水以及反冲洗功能;树脂型粒子电极层(4)所使用的树脂是由普通强酸型阳离子交换树脂经预处理后得到的,预处理方法如下,先将普通强酸型阳离子交换树脂用去离子水清洗,然后用丙酮清洗三到四次,再用去离子水清洗,达到去除杂质的目的,之后将清洗好的强酸型阳离子交换树脂以树脂体积:溶液体积为1:10的比例放入FeCl3溶液中浸泡24小时,以达到负载Fe3+的目的,最后把负载了Fe3+离子的强酸型阳离子交换树脂从FeCl3溶液中取出,再次用去离子水清洗后放入温度为373K的环境中烘干即可完成对树脂的预处理。1. A tin-plated wastewater purification system, characterized in that it includes a resin-type particle electrode layer (4), an adsorption-type biological filter material layer (5), and the resin-type particle electrode layer (4) is filled with cations with ion exchange Resin type particle electrode, adsorption type biological filter material layer (5) is filled with zeolite, resin type particle electrode layer (4), adsorption type biological filter material layer (5) are combined in series from top to bottom in a reactor; the resin type particle electrode layer (4) is externally connected with a DC power supply (1), and the DC power supply passes through the cathode wire (3), the anode wire (2) and the titanium mesh (17) inside the resin type particle electrode layer (4) and the external titanium mesh (17) respectively. Stainless steel orifice plate electrodes (16) are connected to achieve the purpose of ion exchange of heavy metals in tin-plating wastewater and electrocatalytic oxidation of organic matter on the basis of an external electric field to improve the biodegradability of wastewater; Degrade the microbial community resistant to toxicity, thereby improving the treatment efficiency of tin-plating wastewater; the bottom of the adsorption type biological filter material layer (5) is equipped with an aeration pan (18), an aeration pipe (12), and a backwash water inlet pipe (6), The air compressor (7) is connected to the aeration pipe (12), and the backwash water pump (9) is connected to the backwash water inlet pipe (6), so as to realize the aeration, water distribution and backwash of the tinned wastewater purification system and water purification method Function; the resin used in the resin-type particle electrode layer (4) is obtained after pretreatment of common strong-acid cation-exchange resins. The pre-treatment method is as follows. Wash with acetone three to four times, and then wash with deionized water to remove impurities. Then put the cleaned strong acid type cation exchange resin into the FeCl 3 solution with a ratio of resin volume:solution volume of 1:10 and soak for 24 hours. Hours, to achieve the purpose of loading Fe 3+ , finally the strong acid type cation exchange resin loaded with Fe 3+ ions is taken out from the FeCl 3 solution, washed with deionized water again and then put into the environment where the temperature is 373K and dried. Pretreatment of the resin can be done.
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