WO2013156002A1 - Nano catalyst electrolysis flocculation air flotation device - Google Patents

Nano catalyst electrolysis flocculation air flotation device Download PDF

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WO2013156002A1
WO2013156002A1 PCT/CN2013/076545 CN2013076545W WO2013156002A1 WO 2013156002 A1 WO2013156002 A1 WO 2013156002A1 CN 2013076545 W CN2013076545 W CN 2013076545W WO 2013156002 A1 WO2013156002 A1 WO 2013156002A1
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cathode
air flotation
anode
electrolysis
tank
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PCT/CN2013/076545
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French (fr)
Chinese (zh)
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张世文
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波鹰(厦门)科技有限公司
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Priority to CN2012101159961A priority patent/CN102936072B/en
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Publication of WO2013156002A1 publication Critical patent/WO2013156002A1/en

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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/465Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electroflotation
    • 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
    • C02F1/24Treatment of water, waste water, or sewage by flotation
    • 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
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281Installations for water purification using chemical agents

Abstract

A nano catalyst electrolysis flocculation air flotation device. Disposed in a shell is a coagulation sedimentation tank, a primary air flotation tank, an electrolysis air flotation tank, and a slag discharging tank. Provided on top of the coagulation sedimentation tank are a water inlet and a mixer. The bottom of the coagulation sedimentation tank is in communication with the primary air flotation tank. A side waste discharging outlet is connected to a waste discharging pipe. Disposed on the side of the primary air flotation tank is a dissolved air release pipe, a waste discharging outlet is connected to a waste discharging pipe, and the upper part inside of the primary air flotation tank is in communication with the electrolysis air flotation tank. The electrolysis air flotation tank is divided into an upper layer and a lower layer by a upper-lower layer divider. An air-liquid separation chamber in the upper layer is disposed with a slag scraping device. An electrolysis groove is disposed between the upper and lower layer; the bottom of the electrolysis groove is fixed to the bottom of the shell; the top of the electrolysis groove is open and flush with the top of the upper-lower layer divider; electrodes are disposed inside of the electrolysis groove, and the space between the anode and cathode of the electrodes forms a water passage. The present invention integrates electrolysis, flocculation sedimentation, and air flotation into one, and is highly automatic, efficient in waste removal, low in operation cost, and easy to operate and maintain.

Description

一种纳米催化电解絮凝气浮装置Nano catalytic electrolysis flocculation air flotation device 技术领域Technical field
本发明涉及一种 纳米催化电解絮凝气浮 装置,特别是涉及一种集 物理处理法、物化处理法、生化处理法于一体,以表面覆盖有纳米级的具有良好催化特性贵金属化合物涂层材料的钛电极为阳极的 纳米催化电解絮凝气浮装置 。  The invention relates to a nano catalytic electrolysis flocculation air flotation device, in particular to a set The physical treatment method, the physicochemical treatment method and the biochemical treatment method are integrated, and the nano-catalytic electrolytic flocculation air flotation device is provided with a titanium electrode whose surface is covered with a nano-scale noble metal compound coating material with good catalytic properties as an anode.
背景技术Background technique
目前, 治理湖泊富营养 化及废水的技术可分为物理处理法 、物化处理法和生化处理法三大类。物理处理法主要是采用沉淀、过滤、浮选、蒸发等方法去除较大颗粒的杂质等,其中浮选也叫 气浮法,是最简便的一种废水处理法之一,其原理是设法使水中产生大量的微气泡,以形成水、气及被去除物质的三相混合体,在界面张力、气泡上升浮力和静水压力差等多种力的共同作用下,促进 微细气泡粘附在被去除的微小油滴及其它污染物上后,因粘合体密度小于水而上浮到水面,从而使水中油粒及其它污染物被分离去除。 物化处理法主要是采用氧化还原、萃取、吸附、离子交换、混凝沉淀、中和、电渗析等方法去除细小悬浮物、胶体和水溶解物质,或者将有毒物质改性成为无毒物质。生化处理法主要是通过生物作用将废水中胶体的和溶解的有机物质分解破坏而分离去除,主要有厌氧 法、好氧法、兼氧发酵法等。 At present, the techniques for controlling lake eutrophication and wastewater can be divided into physical treatment methods. , physical and chemical treatment and biochemical treatment of three major categories. The physical treatment method mainly uses precipitation, filtration, flotation, evaporation and the like to remove impurities of larger particles, etc., wherein flotation is also called The air floatation method is one of the easiest methods of wastewater treatment. Its principle is to try to make a large amount of microbubbles in the water to form a three-phase mixture of water, gas and removed substances, and the buoyancy at the interfacial tension and bubble rise. And the combination of hydrostatic pressure and other forces, promote After the fine bubbles adhere to the removed minute oil droplets and other contaminants, the density of the binder is less than the water and floats to the surface of the water, so that the oil particles and other pollutants in the water are separated and removed. The physicochemical treatment method mainly uses redox, extraction, adsorption, ion exchange, coagulation precipitation, neutralization, electrodialysis and other methods to remove fine suspended solids, colloids and water-soluble substances, or to modify toxic substances into non-toxic substances. The biochemical treatment method mainly separates and removes the colloidal and dissolved organic substances in the wastewater by biological action, mainly including anaerobic Method, aerobic method, anaerobic fermentation method, etc.
近年来, 电气浮法 是物化处理技术中发展较为活跃的废水处理技术, 该法在水中设置正负电极,当通上直流电后,一个电极(阴极)上即产生微小气泡,同时,还产生电解混凝等效应。当前,有各种类型的电气浮法装置, 已应用于生活 污水、工业有机废水、电镀废水、油田废水等的处理中。但是,现有的 电气浮法 装置在运行过程中暴露出一些问题,一是电极消耗大,电极材料污染水体;二是电极的电密度小,过电位高,工作电压较高,产生的 初生态的强氧化性物质与微小气泡的数量有限,电能应用效率不高,能耗大;三是电解后,固液分离效果不理想,需要进行二次固液分离,处理工艺流程长。 In recent years, the electric float method is a more active wastewater treatment technology in the materialized treatment technology. The method is provided with positive and negative electrodes in the water. When the direct current is applied, tiny bubbles are generated on one electrode (cathode), and at the same time, effects such as electrolytic coagulation are generated. Currently, there are various types of electrical float devices that have been used in life. Treatment of sewage, industrial organic wastewater, electroplating wastewater, oil field wastewater, etc. However, the existing electrical float method The device exposes some problems during the operation. First, the electrode consumes a large amount, and the electrode material pollutes the water body. Second, the electrode has a small electric density, a high overpotential, and a high working voltage. The amount of strong oxidizing substances and microbubbles in the initial ecology is limited, the efficiency of electric energy application is not high, and the energy consumption is large. Third, after electrolysis, the solid-liquid separation effect is not satisfactory, and secondary solid-liquid separation is required, and the treatment process is long.
中国专利: 201010202356 . 5 公开了一种电絮凝 - 电气浮净化洗浴及洗衣废水的分级回用装置, 其特征是设置集水槽的出水通过三通一路作为前端出水直接输出 , 另一路串接文丘里管 ,文丘里管的出水口接电解槽,文丘里管的喉管与带有滤罩的进气管连通;设置电解槽为铁促双阳极氧化单元,是以 Ti/SnO2 阳极和 Fe 阳极分处在阴极的两侧构成组合阳极,阴极采用空气扩散电极;在电解槽的出水口串联设置两级过滤单元,在两级过滤单元的一级过滤室上设置一级出水阀;在两级过滤单元的二级过滤室上设置二级出水阀;能有效减少或去除洗浴 / 洗衣废水中的表面活性剂及其他有机污染物,使得洗浴 / 洗衣废水得到分级回用。China Patent: 201010202356 . 5 discloses a grading and recycling device for electroflocculation-electric float cleaning bath and laundry wastewater, which is characterized in that the effluent of the sump is directly outputted through the three-way one-way as the front-end effluent, and the other is connected in series to the venturi. Tube, the outlet of the venturi tube is connected to the electrolysis tank, and the throat of the venturi tube is connected with the inlet pipe with the filter cover; the electrolyzer is set as the iron-assisted double anodization unit, which is a Ti/SnO 2 anode and a Fe anode. A combined anode is formed on both sides of the cathode, and an air diffusion electrode is used in the cathode; a two-stage filtration unit is arranged in series at the outlet of the electrolytic tank, and a first-stage outlet valve is arranged on the primary filtration chamber of the two-stage filtration unit; A secondary outlet valve is arranged on the secondary filtration chamber of the unit; the surfactant and other organic pollutants in the bath/washing wastewater can be effectively reduced or removed, so that the bath/washing wastewater is fractionated and reused.
中国专利 CN02248009.9 公开 一种电气浮法处理污水的装置 ,该 电气浮反应器由若干管式反应单元构成,单元管式反应由阴极棒、短管、绝缘管套、阳极外管和绝缘销 构成 ,阳极外管和阴极棒同轴安装,两极之间的环形间隙构成污水通道,阴极棒另一端附有的短管与阴极棒共同构成阴极,数个反应单元相互串联并水平安装在装置本体内,单元之间通过金属导电条相连,解决了现有污水处理设备集水比小、传质条件差、电流分布不均、单位体积处理能力低等问题,具有结构简单、有利于增强传质,缩短处理时间,提高污水处理效率等优点,广泛适合于工业废水处理、工业循环冷却水处理及生活用水处理。 Chinese patent CN02248009.9 discloses a device for treating sewage by electric float method, The electric float reactor consists of a number of tubular reaction units consisting of a cathode rod, a short tube, an insulating sleeve, an anode outer tube and an insulating pin. The anode outer tube and the cathode rod are coaxially mounted, and the annular gap between the two poles constitutes a sewage passage, and the short tube attached to the other end of the cathode rod and the cathode rod together form a cathode, and the plurality of reaction units are connected in series and horizontally installed in the apparatus body. The units are connected by metal conductive strips, which solves the problems of small water collection ratio, poor mass transfer conditions, uneven current distribution, and low processing capacity per unit volume of the existing sewage treatment equipment, and has a simple structure and is advantageous for enhancing mass transfer. It can shorten the treatment time and improve the efficiency of sewage treatment. It is widely suitable for industrial wastewater treatment, industrial circulating cooling water treatment and domestic water treatment.
技术问题technical problem
本发明是针对现有的电气浮装置存在的不足,提供一种集气浮技术、絮凝沉淀技术、纳米技术、电催化技术和电化学技术于一体,以表面覆盖有纳米级的具有良好催化特性贵金属化合物涂层材料的钛电极为阳极,集电解、固液分离和气液分离功能为一体的纳米催化电解絮凝气浮装置。本发明采用二级气浮处理,第一级采用物理气浮,使污染物粘附在气泡上,使其密度小于水,从而实现悬浮分离;第二级是在物理气浮基础上采用集纳米技术、催化技术相结合的电化学方法进行二次气浮处理。与传统的电解装置相比,本发明具有工作电压极低、电流密度大、能耗小、电效率较高、没有电极消耗等特征,并集电解、絮凝沉淀、气浮等多种功能为一体。 The invention aims at the deficiencies of the existing electric floating device, and provides a gas collecting and floating technology, a flocculation and sedimentation technology, a nanotechnology, an electrocatalytic technology and an electrochemical technology, and has a good catalytic property with a nanometer surface covering the surface. The titanium electrode of the precious metal compound coating material is an anode, and the nano catalytic electrolysis flocculation air flotation device integrating electrolysis, solid-liquid separation and gas-liquid separation functions is integrated. The invention adopts two-stage air flotation treatment, and the first stage adopts physical air floatation, so that the pollutant adheres to the bubble, so that the density is less than water, thereby achieving suspension separation; the second stage is to adopt nanometer collection on the basis of physical air floatation. Electrochemical methods combining technology and catalytic technology are used for secondary air flotation treatment. Compared with the traditional electrolysis device, the invention has the characteristics of extremely low operating voltage, large current density, low energy consumption, high electric efficiency, no electrode consumption, and integrates various functions such as electrolysis, flocculation and sedimentation, and air flotation. .
技术解决方案Technical solution
本发明设有壳体,壳体内用隔板分隔成混凝沉淀池、一级气浮池、电解气浮池、排渣池等四个功能池。所述混凝搅拌池顶部设有进水口和安装有搅拌器,所述进水口通过管道与废水进水管道连接,在混凝沉淀池底部设有废水出口,所述废水出水口与一级气浮池连通。所述一级气浮池底部设有溶气释放器、溶气释放管,溶气释放管与溶气释放器、空压机管道连接,一级气浮池顶部与电解气浮池相通。所述电解气浮池底部与上部之间由挡板隔开,分为上下二层,上层为气液分离室,设有刮渣装置,出渣口与排渣池相通,下层为排水沉淀室,上下层之间有电解槽,设有至少一个电解槽,电解槽的底部固定在壳体内底部,电解槽的顶部敞开并与上下层隔板顶部水平,电解槽内安装有电极,电极包括阳极和阴极,阳极和阴极之间的间距为过水通道。所述阳极与直流电源的阳极联接,所述阴极与直流电源的阴极联接;排污口设置在排水沉淀室底部,集水出水管设置在排水沉淀室中间偏上位置,与电解出水管道连接。排渣池设有排渣口,排渣口与排渣管连接。The invention is provided with a shell, and the shell is divided into four functional pools, such as a coagulation sedimentation tank, a first-stage air floating pool, an electrolysis air floating tank and a slag discharge tank, by a partition plate. The top of the coagulation mixing tank is provided with a water inlet and a stirrer, and the water inlet is connected to the waste water inlet pipe through a pipeline, and a waste water outlet is arranged at the bottom of the coagulation sedimentation tank, the waste water outlet and the first gas The floating pool is connected. The bottom of the first-stage air floating pool is provided with a dissolved gas release device and a dissolved gas release pipe, and the dissolved gas release pipe is connected with the dissolved gas release device and the air compressor pipe, and the top of the first-stage air floating pool is connected with the electrolytic air floating pool. The bottom and the upper part of the electrolysis air floating pool are separated by a baffle, and are divided into upper and lower layers, the upper layer is a gas-liquid separation chamber, and a scraping device is arranged, the slag outlet is connected with the slag discharge tank, and the lower layer is a drainage sedimentation chamber. There is an electrolytic cell between the upper and lower layers, and at least one electrolytic cell is arranged. The bottom of the electrolytic cell is fixed at the bottom of the inner casing. The top of the electrolytic cell is open and horizontal with the top of the upper and lower baffles. The electrode is equipped with electrodes, and the electrode includes an anode and The cathode, the spacing between the anode and the cathode is a water passage. The anode is coupled to the anode of the direct current power source, the cathode is coupled to the cathode of the direct current power source; the drain outlet is disposed at the bottom of the drainage sedimentation chamber, and the water collection outlet pipe is disposed at an upper position in the middle of the drainage sedimentation chamber, and is connected to the electrolysis water outlet conduit. The slag discharge tank is provided with a slag discharge port, and the slag discharge port is connected with the slag discharge pipe.
所述壳体设有内层和外层,内层采用环氧沥青漆处理,外层采用钢板外层。The casing is provided with an inner layer and an outer layer, the inner layer is treated with an epoxy asphalt paint, and the outer layer is an outer layer of steel.
所述电解气浮池分为排水沉淀室与气液分离室。The electrolysis floating tank is divided into a drainage sedimentation chamber and a gas-liquid separation chamber.
所述电解槽为长方体电解槽或正方体电解槽。The electrolytic cell is a rectangular parallelepiped electrolytic cell or a rectangular parallelepiped electrolytic cell.
电解槽内安装有电极,电极包括阳极和阴极,阳极和阴极之间的间距为2mm ~ 4mm,阳极和阴极之间的空隙做为水流通道。An electrode is installed in the electrolytic cell, the electrode includes an anode and a cathode, and the spacing between the anode and the cathode is 2 mm ~ 4mm, the gap between the anode and the cathode acts as a water flow channel.
所述电解槽内阳极与阴极顶部与电解槽顶部之间留有150mm~200mm高度的间隙。A gap of 150 mm to 200 mm in height is left between the anode and the top of the cathode and the top of the electrolytic cell in the electrolytic cell.
所述阳极采用表面覆盖有晶粒为10~35nm的金属氧化物涂层的钛基板阳极,所述阳极为平板状、圆弧状、圆筒状、网状中的一种形状;所述阴极是以钛、铁、铝、不锈钢、锌、铜、镍、铅或石墨为材料的阴极,所述阴极为平板状、圆弧状、圆筒状、网状中的一种形状。The anode is a titanium substrate anode covered with a metal oxide coating having a crystal grain size of 10 to 35 nm, and the anode is in a shape of a flat plate, an arc shape, a cylinder shape, or a mesh shape; The cathode is made of titanium, iron, aluminum, stainless steel, zinc, copper, nickel, lead or graphite, and the cathode has one of a flat shape, an arc shape, a cylindrical shape, and a mesh shape.
所述阳极与阴极间的工作电压为2~8V,电流密度为10~250mA/cm2 ,阳极与阴极间的工作电压最好为3~5V,最佳电流密度为100~150mA/cm2The working voltage between the anode and the cathode is 2 to 8 V, the current density is 10 to 250 mA/cm 2 , the working voltage between the anode and the cathode is preferably 3 to 5 V, and the optimum current density is 100 to 150 mA/cm 2 .
所述的混凝沉淀池中加入的絮凝剂为铝盐、铁盐、聚铝、聚铁中的一种或多种的组合,加入量为2~500g/m3;所述的助凝剂为聚丙烯酰胺,加入量为2~300g/m3The flocculating agent added to the coagulation sedimentation tank is a combination of one or more of an aluminum salt, an iron salt, a poly aluminum, and a poly iron, and the amount is 2 to 500 g/m 3 ; the coagulant; It is a polyacrylamide and is added in an amount of 2 to 300 g/m 3 .
在对淡水、海水和苦咸水、废水、市政污水进行处理时,首先通过装置内的混凝沉淀池,在搅拌作用下加入适量的絮凝剂和助凝剂,加快水中固体颗粒物质(如化学沉淀物、混凝处理所形成的絮体和生物处理的污泥等)相互凝聚,形成粒径和质量较大的颗粒固体物,并快速沉淀下来而从水中去除,同时通过沉淀作用去除水中的砂粒;然后,进入一级气浮池,溶气释放器产生的微小气泡粘附水中大量的轻质悬浮物(如细小固体颗粒、油、苯等)上浮,达到固液分离或液液分离的效果,从而降低水中的COD、氨氮、色度、浊度等;一级气浮池的出水进入电解气浮池,电解产生的强氧化性物质杀灭水中的微生物、细菌、藻类和浮游生物,并氧化分解水中的有机物,使得水中的COD、色度、浊度、氨氮、臭味等污染指标大幅度降低;最后通过排渣池收集沉淀物和浮渣,使得水体获得净化。When treating fresh water, sea water and brackish water, wastewater, municipal sewage, firstly add a proper amount of flocculant and coagulant under stirring by means of a coagulation sedimentation tank in the plant to accelerate solid particulate matter in water (such as chemistry). The precipitates, the flocs formed by the coagulation treatment, the biologically treated sludge, etc.) agglomerate each other to form a particulate solid having a large particle size and mass, and are quickly precipitated and removed from the water, and at the same time, the water is removed by precipitation. Sand; then, into the first-stage air-floating tank, the tiny bubbles generated by the dissolved gas release device adhere to a large amount of light suspended matter (such as fine solid particles, oil, benzene, etc.) in the water to reach the effect of solid-liquid separation or liquid-liquid separation. , thereby reducing COD, ammonia nitrogen, chromaticity, turbidity, etc. in the water; the effluent of the primary air floatation tank enters the electrolysis air floatation tank, and the strong oxidizing substance produced by electrolysis kills microorganisms, bacteria, algae and plankton in the water, and oxidatively decomposes The organic matter in the water greatly reduces the COD, color, turbidity, ammonia nitrogen, odor and other pollution indicators in the water; finally collects the sediment through the slag pool Scum, so that the water purification obtained.
所述的电解气浮池在对淡水进行消毒净化时,通过覆盖于阳极表层的纳米涂层的电催化作用,降低电解的过电位,从而使淡水在较低的电压条件下电解产生游离基,如初生态的氧、初生态的氯、羟基和氢,并发生以下四个作用:The electrolyzed air floating tank reduces the overpotential of the electrolysis by the electrocatalysis of the nano-coating covering the surface layer of the anode during the disinfection and purification of the fresh water, so that the fresh water is electrolyzed to generate a radical at a lower voltage condition, as initially Ecological oxygen, nascent chlorine, hydroxyl and hydrogen, and the following four effects:
1、电解产生的游离基如初生态的氧、初生态的氯、羟基等强氧化物质可以杀灭水中的微生物、细菌、藻类和浮游生物,产生的尸体可以与阴极产生的大量微小气泡结合上浮去除,消除微生物、藻类和浮游生物的污染并降低浊度;1. The free radicals generated by electrolysis, such as nascent oxygen, nascent chlorine, hydroxyl and other strong oxidizing substances can kill microorganisms, bacteria, algae and plankton in the water, and the resulting corpses can be removed by a large number of tiny bubbles generated by the cathode. Eliminate pollution from microorganisms, algae and plankton and reduce turbidity;
2、电解产生的强氧化物质可以氧化分解水中的有机物,降低水中的COD、色度、臭味等污染指标;2. The strong oxidizing substance produced by electrolysis can oxidize and decompose organic matter in water, and reduce the pollution index such as COD, chromaticity and odor in water;
3、在电场作用下,一方面使得水中的悬浮物、胶体、带电微粒等物质脱稳,另一方面水中的阳离子、阴离子分别向阴极和阳极移动,在阴极和阳极发生双电层作用和多电层作用,形成沉淀诱发絮凝作用,促使细小的悬浮物、胶体、带电微粒等物质形成粗大的絮凝体,加速杂质沉降,有效降低SS、浊度等污染指标;3. Under the action of electric field, on the one hand, the suspended solids, colloids, charged particles and other substances in the water are destabilized. On the other hand, the cations and anions in the water move to the cathode and the anode respectively, and the electric double layer acts on the cathode and the anode. The action of the electric layer forms a precipitation-induced flocculation effect, which promotes the formation of coarse flocs by fine suspended matter, colloids, charged particles and the like, accelerates the sedimentation of impurities, and effectively reduces the pollution indexes such as SS and turbidity;
4、电解时阴极产生的大量初生态的氢可形成氢气小气泡,具有气浮效果,随着气泡的上浮,会粘附大量的轻质悬浮物,达到固液分离或液液分离的效果,从而进一步降低水中的COD、色度、浊度等。4. A large amount of nascent hydrogen produced by the cathode during electrolysis can form small bubbles of hydrogen gas, which has an air floating effect. As the bubbles rise, a large amount of light suspended matter will adhere to the solid-liquid separation or liquid-liquid separation. Thereby further reducing COD, chromaticity, turbidity and the like in water.
所述的电解气浮池在对海水和苦咸水净化消毒时,是通过覆盖于阳极表层的涂层的电催化作用,降低电解的过电位,从而使一级气浮后的海水、苦咸水在较低的电压条件下电解,产生初生态的氯[Cl]和初生态的氢[H],并发生以下四个作用:When the electrolyzed air floatation tank is used for purifying and disinfecting seawater and brackish water, the electrocatalytic action of the coating covering the surface layer of the anode is used to reduce the overpotential of the electrolysis, thereby causing the seawater and brackish water after the first air flotation. Electrolysis at lower voltages produces nascent chlorine [Cl] and nascent hydrogen [H], and the following four effects occur:
1、电解产生的初生态的氯[Cl]具有强氧化性,可以杀灭水中的微生物、藻类和浮游生物,产生的尸体可以与阴极产生的大量微小气泡结合上浮去除,彻底消除微生物、藻类和浮游生物的污染并降低浊度;1. The nascent chlorine [Cl] produced by electrolysis has strong oxidizing properties, which can kill microorganisms, algae and plankton in the water. The resulting corpses can be removed and removed together with a large number of tiny bubbles generated by the cathode, completely eliminating microorganisms, algae and Plankton contamination and reduced turbidity;
2、电解产生的初生态的氯[Cl]能氧化分解水中的有机物,降低水中的COD、色度、臭味等污染指标;2. The nascent chlorine [Cl] produced by electrolysis can oxidize and decompose organic matter in water, and reduce the COD, chroma, odor and other pollution indicators in the water;
3、在电场作用下,一方面使得水中的悬浮物、胶体、带电微粒等物质脱稳,另一方面水中的阳离子、阴离子分别向阴极和阳极移动,在阴极和阳极发生双电层作用和多电层作用,形成沉淀诱发絮凝作用,促使细小的悬浮物、胶体、带电微粒等物质形成粗大的絮凝体,加速杂质沉降,有效降低SS、浊度等污染指标;3. Under the action of electric field, on the one hand, the suspended solids, colloids, charged particles and other substances in the water are destabilized. On the other hand, the cations and anions in the water move to the cathode and the anode respectively, and the electric double layer acts on the cathode and the anode. The action of the electric layer forms a precipitation-induced flocculation effect, which promotes the formation of coarse flocs by fine suspended matter, colloids, charged particles and the like, accelerates the sedimentation of impurities, and effectively reduces the pollution indexes such as SS and turbidity;
4、电解时阴极产生的大量初生态的氢可形成氢气小气泡,具有气浮效果,随着气泡的上浮,会粘附大量的轻质悬浮物,达到固液分离或液液分离的效果,从而进一步降低水中的COD、色度、浊度等。4. A large amount of nascent hydrogen produced by the cathode during electrolysis can form small bubbles of hydrogen gas, which has an air floating effect. As the bubbles rise, a large amount of light suspended matter will adhere to the solid-liquid separation or liquid-liquid separation. Thereby further reducing COD, chromaticity, turbidity and the like in water.
所述的电解气浮池在对废水、市政污水进行处理时,是通过覆盖于阳极表层的涂层的电催化作用,降低电解的过电位,从而使一级气浮后废水、市政污水在较低的电压条件下电解,产生初生态的强氧化性物质,在有大量氯离子存在时,产生的是初生态的氯[Cl]和初生态的氢[H];在没有氯离子存在时,产生的是初生态的氧[O]、羟基[OH]和初生态的氢[H],并发生以下七个作用:When the electrolysis floating tank is treated with waste water and municipal sewage, the electrocatalytic action of the coating covering the surface layer of the anode is used to reduce the overpotential of the electrolysis, so that the wastewater after the first air flotation and the municipal sewage are lower. Electrolysis under voltage conditions, producing nascent strong oxidizing substances, in the presence of a large amount of chloride ions, the production of nascent chlorine [Cl] and nascent hydrogen [H]; in the absence of chloride ions, It is the nascent oxygen [O], hydroxyl [OH] and nascent hydrogen [H], and the following seven effects occur:
1、电解产生的初生态的强氧化性物质杀灭水中的微生物、细菌、藻类和浮游生物并与阴极产生的大量微小气泡结合上浮去除,消除微生物、细菌、藻类、浮游生物的污染并降低浊度;1. Electrolytic priming strong oxidizing substances kill microorganisms, bacteria, algae and plankton in water and combine with a large number of tiny bubbles generated by the cathode to remove and eliminate the pollution of microorganisms, bacteria, algae and plankton and reduce turbidity. degree;
2、电解产生的初生态的强氧化性物质快速氧化分解废水中的有机物,使得大分子物质分解为小分子物质,降低废水中的COD,同时提高B/C值,改善可生化性,为后续处理创造更好的生化条件;2. The eutectic strong oxidizing substances produced by electrolysis rapidly oxidize and decompose the organic matter in the wastewater, so that the macromolecular substances are decomposed into small molecular substances, reduce the COD in the wastewater, increase the B/C value, and improve the biodegradability. Processing to create better biochemical conditions;
3、电解产生的初生态的强氧化性物质快速氧化分解残留在废水中有色物质的发色基团和助色基团,使其发生断链或开环,使废水脱色,并结合阴极产生的大量微小气泡的气浮作用,有效降低废水色度,达到脱色的目的;3. The eutectic strong oxidizing substance produced by electrolysis rapidly oxidizes and decomposes the chromophoric group and the color-promoting group remaining in the waste water, causing chain scission or ring opening, decolorizing the wastewater, and combining with the cathode. The air flotation of a large number of tiny bubbles effectively reduces the color of the wastewater and achieves the purpose of decolorization;
4、电解产生的初生态的强氧化性物质快速氧化分解废水中的氨氮,降低水中的氨氮指标;4. The eutectic strong oxidizing substance produced by electrolysis rapidly oxidizes and decomposes ammonia nitrogen in wastewater, and reduces ammonia nitrogen index in water;
5、电解产生的多种游离基(强氧化性物质)可以氧化分解废水中的发臭基团,去除废水中的恶臭;5. Various free radicals (strong oxidizing substances) produced by electrolysis can oxidize and decompose the odorous groups in the wastewater to remove the foul odor in the wastewater;
6、在电场作用下,一方面使得水中的悬浮物、胶体、带电微粒等物质脱稳,另一方面水中的阳离子、阴离子分别向阴极和阳极移动,在阴极和阳极发生双电层作用和多电层作用,形成沉淀诱发絮凝作用,促使细小的悬浮物、胶体、带电微粒等物质形成粗大的絮凝体,加速杂质沉降,有效降低SS、浊度等污染指标;6. Under the action of electric field, on the one hand, the suspended solids, colloids, charged particles and other substances in the water are destabilized. On the other hand, the cations and anions in the water move to the cathode and the anode respectively, and the electric double layer acts on the cathode and the anode. The action of the electric layer forms a precipitation-induced flocculation effect, which promotes the formation of coarse flocs by fine suspended matter, colloids, charged particles and the like, accelerates the sedimentation of impurities, and effectively reduces the pollution indexes such as SS and turbidity;
7、电解时阴极产生的大量初生态的氢可形成氢气小气泡,具有气浮效果,随着气泡的上浮,会粘附大量的轻质悬浮物,达到固液分离或液液分离的效果,从而进一步降低水中的COD、色度、浊度等。7. A large amount of nascent hydrogen produced by the cathode during electrolysis can form small bubbles of hydrogen gas, which has the effect of air flotation. As the bubbles rise, a large amount of light suspended matter will adhere to the solid-liquid separation or liquid-liquid separation. Thereby further reducing COD, chromaticity, turbidity and the like in water.
综上所述,本发明是集气浮技术、絮凝沉淀技术、纳米技术、催化技术和电化学技术的新型水处理装置,集电解、絮凝沉淀、气浮等多种功能为一体,能快速、有效地降低水中的COD、氨氮、色度、臭味、浊度、SS等,并杀灭水中的微生物、细菌、藻类和浮游生物,使得水体获得净化。In summary, the present invention is a novel water treatment device integrating gas floating technology, flocculation sedimentation technology, nanotechnology, catalytic technology and electrochemical technology, which integrates various functions such as electrolysis, flocculation sedimentation and air flotation, and can be fast, Effectively reduce COD, ammonia nitrogen, color, odor, turbidity, SS, etc. in water, and kill microorganisms, bacteria, algae and plankton in water, so that the water body can be purified.
有益效果Beneficial effect
采用 纳米催化电解絮凝气浮装置 对水进行净化处理,具有如下显著优点: The use of nano-catalytic electrolysis flocculation flotation devices for the purification of water has the following significant advantages:
1、它 集电解、絮凝沉淀、气浮等多种功能为一体,自动化程度高,除污效率高,运行成本低,操作和维护方便; 1, it It integrates various functions such as electrolysis, flocculation and sedimentation, air flotation, etc., with high degree of automation, high decontamination efficiency, low operating cost, and convenient operation and maintenance;
2、加入絮凝剂和气浮剂等化学物质只有传统工艺的五分之一,不仅大幅度降低化学物质消耗,节省水处理成本,而且减少了二次污染; 2. The addition of chemical substances such as flocculants and air floatants is only one-fifth of the traditional process, which not only greatly reduces the consumption of chemical substances, saves water treatment costs, but also reduces secondary pollution;
3、产生的污泥量只有传统技术的 五分之一, 大幅度降低污泥排放,并减少固体废物处理成本; 3. The amount of sludge produced is only one-fifth of that of traditional technology, which greatly reduces sludge discharge and reduces the cost of solid waste treatment;
4、装置运行稳定,能快速、有效地处理水中的细菌、藻类、微生物、浮游动物、COD、氨氮、色度、臭味、浊度、SS等,出水水质良好。 4, the device is stable, can quickly and effectively treat bacteria, algae, microorganisms, zooplankton, COD, ammonia nitrogen, color, odor, turbidity, SS, etc. in water, the effluent water quality is good.
附图说明DRAWINGS
图 1 为本发明实施例的结构组成示意图。 FIG. 1 is a schematic structural view of an embodiment of the present invention.
图 2 为图 1 的俯视图。 Figure 2 is a top view of Figure 1.
图 3 为图 1 的侧视图。 Figure 3 is a side view of Figure 1.
本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION
下面结合附图对本 发明作进一步的说明: The invention will be further described below with reference to the accompanying drawings:
如图 1~3 所示,本发明实施例设有 壳体 1 、混凝沉淀池2、一级气浮池3、电解气浮池4、排渣池5、进水口6、搅拌器 7 、溶气释放管 8、电解槽 9、电极 10 、刮渣装置 11、排渣口12、排污口13、上下层隔板14、集水管15、排污口16、排水沉淀室17、气液分离室18、集水出水口19、溶气释放器20、阳极接线柱21和阴极接线柱22 。 As shown in FIGS. 1 to 3, the embodiment of the present invention is provided with a housing 1 , coagulation sedimentation tank 2, first-stage air flotation tank 3, electrolysis gas floatation tank 4, slag discharge tank 5, water inlet 6, agitator 7 , dissolved gas release pipe 8, electrolytic cell 9, electrode 10, scraping device 11. Slag discharge port 12, drain outlet 13, upper and lower baffles 14, water collecting pipe 15, sewage outlet 16, drainage sedimentation chamber 17, gas-liquid separation chamber 18, water collection outlet 19, dissolved gas release 20, anode wiring Column 21 and cathode terminal 22 .
在壳体 1 用隔板分隔成混凝沉淀池 2、一级气浮池 3 、电解气浮池 4 、排渣池 5 四个池,混凝沉淀池 2 顶部设有进水口 6 和搅拌器 7,进水口 6 通过管道与废水进水管道连接,混凝沉淀池底部与一级气浮池 3 相通,边部排污口 16 与排污管连接;一级气浮池 3 边部设有溶气释放管8 ,溶气释放管 8 与溶气释放器 20 、外部气源连接,排污口16 与排污管连接,在一级气浮池 3 内侧上部与电解气浮池 4 相通;电解气浮池 4 被隔板 14 分为上下二层,上层为气液分离室 18 ,设有浮渣刮板、出渣口,上下层之间装有电解槽,设有至少一个电解槽 9 ,电解槽 9 的底部固定在壳体 1 内底部,电解槽 9 的顶部敞开并与上下层隔板 14 顶部水平,电解槽 9 内安装有电极 10 ,电极 10 包括阳极和阴极,阳极和阴极之间的间隙为过水通道,所述阳极通过阳极接线柱 21 与直流电源的阳极联接,所述阴极通过阴极接线柱 22 与直流电源的阴极联接,排污口 16 设置在排水沉淀室 17 底部,集水管 15 设置在排水沉淀室 17 中间偏上位置,与电解出水管道连接;排渣池 5 设有排渣口 12 ,排渣口 12 与排渣管连接。 Separated into a coagulation sedimentation tank by a partition in the casing 1 2. a primary air floatation tank 3, an electrolysis air floatation tank 4, a slag discharge tank 5 Four pools, coagulation sedimentation tank 2 with water inlet 6 at the top and agitator 7, water inlet 6 connected to the wastewater inlet pipe through the pipeline, the bottom of the coagulation sedimentation tank is connected with the first-stage air-floating tank 3, and the side sewage outlet 16 Connected to the sewage pipe; the first air flotation tank 3 is provided with a dissolved gas release pipe 8, the dissolved gas release pipe 8 is connected with the dissolved gas release device 20, the external gas source, and the sewage outlet 16 is connected with the sewage pipe, in the first-stage air floating pool 3 The inner upper portion communicates with the electrolysis air floating tank 4; the electrolysis air floating tank 4 is divided into upper and lower layers by the partition plate 14, and the upper layer is a gas-liquid separation chamber. There is a scum scraper and a slag outlet, and an electrolytic tank is arranged between the upper and lower layers, and at least one electrolytic tank 9 is provided. The bottom of the electrolytic tank 9 is fixed at the bottom of the casing 1, and the top of the electrolytic tank 9 is open and Upper and lower partitions 14 At the top level, an electrode 10 is mounted in the electrolytic cell 9, the electrode 10 includes an anode and a cathode, and a gap between the anode and the cathode is a water passage, and the anode passes through the anode terminal 21 Connected to the anode of the direct current power source, the cathode is coupled to the cathode of the direct current power source through the cathode terminal 22, the drain outlet 16 is disposed at the bottom of the drainage sedimentation chamber 17, and the water collection tube 15 is disposed in the drainage sedimentation chamber. The middle upper position is connected with the electrolysis water outlet pipe; the slag discharge tank 5 is provided with a slag discharge port 12, and the slag discharge port 12 is connected with the slag discharge pipe.
所述壳体 1 由内、外两层构成,内层采用环氧沥青漆处理,外层为钢板。 The casing 1 is composed of inner and outer layers, the inner layer is treated with epoxy asphalt paint, and the outer layer is steel plate.
所述电解槽 9 内安装有电极 10 ,电极 10 包括阳极和阴极,阳极和阴极之间的间距为2mm~4mm 。 An electrode 10 is mounted in the electrolytic cell 9, the electrode 10 includes an anode and a cathode, and the spacing between the anode and the cathode is 2 mm to 4 mm. .
所述电解槽 9 内阳极与阴极顶部与电解槽 9 顶部之间留有150mm~200mm 高度的间隙。 A gap of 150 mm to 200 mm is left between the anode and the top of the cathode and the top of the electrolytic cell 9 in the electrolytic cell 9.
所述阳极是以钛为基板,表面覆盖有晶粒为10 ~35nm 的金属氧化物涂层的惰性阳极,阳极为平板状、圆弧状、圆筒状、网状中的一种形状;所述阴极是以钛、铁、铝、不锈钢、锌、铜、镍、铅或石墨为材料的阴极,阴极为圆弧状、圆筒状、网状中的一种形状。 The anode is made of titanium as a substrate, and the surface is covered with crystal grains of 10 to 35 nm. An inert anode of a metal oxide coating, the anode being in the shape of a flat plate, an arc, a cylinder, or a mesh; the cathode is titanium, iron, aluminum, stainless steel, zinc, copper, nickel, Lead or graphite is a cathode of the material, and the cathode has one of an arc shape, a cylindrical shape, and a mesh shape.
所述纳米催化电解絮凝气浮装置工作时电解槽 9 中阳极与阴极间的工作电压为2~8V ,电流密度为10~250mA/cm2 ;两极间的最佳工作电压为3~5V ,最佳电流密度为100~150mA/cm29 in the operating voltage between the anode and the cathode when the electrolytic cell flotation apparatus nanocatalytic electrocoagulation work 2 ~ 8V, a current density of 10 ~ 250mA / cm 2; optimum operating voltage between the two electrodes is 3 ~ 5V, the most The current density is 100 to 150 mA/cm 2 .
在对淡水、海水、苦咸水、废水和市政污水进行处理时,首先通过装置内的混凝沉淀池,在搅拌作用下加入2~500g/m3 的絮凝剂和2~300g/m3 助凝剂,加快水中固体颗粒物质(如化学沉淀物、混凝处理所形成的絮体和生物处理的污泥等)相互凝聚,形成粒径和质量较大的颗粒固体物,并快速沉淀下来而从水中去除,同时通过沉淀作用去除水中的砂粒;然后,进入一级气浮池,溶气释放器产生的微小气泡粘附水中大量的轻质悬浮物(如细小固体颗粒、油、苯等)上浮,达到固液分离或液液分离的效果,从而降低水中的COD、氨氮、色度、浊度等;一级气浮池的出水进入电解气浮池,电解产生的强氧化性物质杀灭水中的微生物、细菌、藻类和浮游生物,并氧化分解水中的有机物,使得水中的COD、色度、浊度、氨氮、臭味等污染指标大幅度降低;最后通过排渣池收集沉淀物和浮渣,使得水体获得净化。When treating fresh water, sea water, brackish water, wastewater and municipal sewage, firstly add 2 to 500 g/m 3 of flocculant and 2 to 300 g/m 3 of aid through the coagulation sedimentation tank in the apparatus. The coagulant accelerates the solid particles in the water (such as chemical precipitates, flocs formed by coagulation treatment and biologically treated sludge, etc.) to agglomerate each other to form particulate solids with large particle size and mass, and quickly precipitates. Removed from the water, and at the same time removes the sand particles in the water by precipitation; then, enters the first-stage air floating pool, and the tiny bubbles generated by the dissolved gas release device adhere to a large amount of light suspended matter (such as fine solid particles, oil, benzene, etc.) in the water. To achieve the effect of solid-liquid separation or liquid-liquid separation, thereby reducing COD, ammonia nitrogen, color, turbidity, etc. in the water; the effluent from the primary air-floating tank enters the electrolysis air-floating tank, and the strong oxidizing substance generated by electrolysis kills microorganisms in the water , bacteria, algae and plankton, and oxidative decomposition of organic matter in water, so that the COD, color, turbidity, ammonia nitrogen, odor and other pollution indicators in the water are greatly reduced; The precipitate was collected and scum, so that the water purification obtained.
本发明的实施方式Embodiments of the invention
实施例 1 Example 1
对富营养化湖水的处理效果 Treatment effect on eutrophic lake water
将湖水泵入纳米催化电解絮凝气浮装置,在混凝沉淀池2中按20~500g/m3 加入絮凝剂PAC,利用搅拌器7进行搅拌,加速沉淀;同时开通一级气浮池3中的溶气释放器20,并调节适当的气体流量;电解气浮池4中电解槽9两极间的电压为3~8V,电流密度为10~150mA/cm2 的状态,保持湖水在一级气浮池3中的停留时间为1~2分钟,且在电解槽9极板之间停留时间为0.3~1分钟,处理前后的效果见表1。The lake is pumped into the nano-catalytic electrolytic flocculation air flotation device, and the flocculant PAC is added in the coagulation sedimentation tank 2 at 20-500 g/m 3 , and the agitator 7 is used for stirring to accelerate the precipitation; at the same time, the first-stage air-floating tank 3 is opened. Dissolving the gas release device 20 and adjusting an appropriate gas flow rate; the voltage between the two electrodes of the electrolysis cell 9 in the electrolysis floating cell 4 is 3 to 8 V, and the current density is 10 to 150 mA/cm 2 , and the lake water is maintained in the first-stage air floating cell 3 The residence time in the medium is 1 to 2 minutes, and the residence time between the plates of the electrolytic cell 9 is 0.3 to 1 minute. The effects before and after the treatment are shown in Table 1.
表 1 对富营养化湖水净化的处理效果  Table 1 Treatment effect of eutrophic lake water purification
序号Serial number CODCr ( mg/L ) COD Cr ( mg/L ) 氨氮 (mg/L) Ammonia nitrogen (mg/L) SS (mg/L) SS (mg/L) 浊度 (NTU) Turbidity (NTU) pH值pH value 细菌总数(个/L)Total number of bacteria (pieces / L) 藻类 (个/L) Algae (/L)
11 进水Influent 99 0.50.5 1515 44 7.237.23 5.4×105 5.4×10 5 4.5×108 4.5×10 8
22 一级气浮后After the first level of air flotation 66 0.50.5 1010 44 7.237.23 4×104 4×10 4 4.5×105 4.5×10 5
33 出水Water 00 未检出not detected 11 11 6.96.9 ≤40≤40 1.8×102 1.8×10 2
实施例 2 Example 2
对海水的处理效果 Treatment effect on seawater
将海水泵入纳米催化电解絮凝气浮装置,在混凝沉淀池2中按加入2~100g/m3 絮凝剂PAC,利用搅拌器7进行搅拌,加速沉淀;同时开通一级气浮池3中的溶气释放器20,并调节适当的气体流量;电解气浮池4中电解槽9两极间的电压为3~5V,电流密度为10~200mA/cm2 的状态,保持海水在一级气浮池3中的停留时间为1~2分钟,且在电解槽9极板之间停留时间为0.3~1分钟,处理前后的效果见表2。The seawater is pumped into the nano-catalytic electrolysis flocculation air flotation device, and 2 to 100 g/m 3 of flocculant PAC is added to the coagulation sedimentation tank 2, and the agitator 7 is used for stirring to accelerate the precipitation; and at the same time, the first-stage air-floating tank 3 is opened. Dissolving the gas release device 20 and adjusting an appropriate gas flow rate; the voltage between the two electrodes of the electrolysis cell 9 in the electrolysis floating cell 4 is 3 to 5 V, and the current density is 10 to 200 mA/cm 2 , and the seawater is maintained in the first-stage air floating cell 3 The residence time in the medium is 1 to 2 minutes, and the residence time between the plates of the electrolytic cell 9 is 0.3 to 1 minute. The effects before and after the treatment are shown in Table 2.
表 2 对海水净化的处理效果  Table 2 Treatment effect on seawater purification
序号Serial number CODCr ( mg/L ) COD Cr ( mg/L ) 氨氮 (mg/L) Ammonia nitrogen (mg/L) SS (mg/L) SS (mg/L) 浊度 (NTU) Turbidity (NTU) pH值pH value 细菌总数(个/L)Total number of bacteria (pieces / L) 藻类 (个/L) Algae (/L)
11 进水Influent 77 0.30.3 1919 3.53.5 8.68.6 2.4×103 2.4×10 3 2.5×104 2.5×10 4
22 一级气浮后After the first level of air flotation 66 0.30.3 1717 3.23.2 8.68.6 1.4×103 1.4×10 3 2.5×103 2.5×10 3
33 出水Water 00 未检出not detected 11 11 7.27.2 ≤3≤3 未检出not detected
实施例 3 Example 3
对印染深度处理废水的处理效果 Treatment effect on wastewater treated by printing and dyeing
将经过生化处理的二沉池印染深度处理废水泵入纳米催化电解絮凝气浮装置,在混凝沉淀池 2 中加入絮凝剂 PAC ,每吨废水加入 800g 的 PAC ,利用搅拌器 7 进行搅拌,加速沉淀;同时开通一级气浮池3中的溶气释放器20 ,并调节适当的气体流量;电解气浮池4 中电解槽 9 两极间的电压为3~5V ,电流密度为10~250mA/cm2 的状态,保持废水在一级气浮池3中的停留时间为5~10分钟,且在电解槽9极板之间停留时间为 2~5 分钟,处理前后的效果见表 3 。The biochemical treatment of the secondary sedimentation tank printing and dyeing advanced treatment wastewater is pumped into the nano catalytic electrolysis flocculation air flotation device, the flocculant PAC is added to the coagulation sedimentation tank 2, 800g of PAC is added per ton of wastewater, and the agitator 7 is used for stirring and accelerating Precipitation; simultaneously open the dissolved gas release unit 20 in the primary air floating tank 3, and adjust the appropriate gas flow rate; the voltage between the two poles of the electrolytic cell 9 in the electrolytic air floating tank 4 is 3 to 5 V, and the current density is 10 to 250 mA/cm 2 In the state, the residence time of the wastewater in the primary flotation cell 3 is 5 to 10 minutes, and the residence time between the plates of the electrolytic cell 9 is 2 to 5 minutes, and the effects before and after the treatment are shown in Table 3.
表3对印染深度处理废水的处理效果 Table 3: Treatment effect of advanced dyeing wastewater treatment
序号Serial number CODCr ( mg/L ) COD Cr ( mg/L ) 氨氮 (mg/L) Ammonia nitrogen (mg/L) SS (mg/L) SS (mg/L) 色度 (倍)Chromaticity (times) pH值pH value
11 进水Influent 316316 3.93.9 9090 200200 7.37.3
22 一级气浮后After the first level of air flotation 201201 4.04.0 8181 185185 7.67.6
33 出水Water 153153 未检出not detected 123123 7575 6.96.9
实施例 4 Example 4
对制革废水的处理效果 Treatment effect on tannery wastewater
制革废水进入粗格栅过滤机过滤除去大颗粒固体物后流入调节池混合,再将调节池的废水泵入水力筛过滤脱毛发等杂质后流入脱硫反应池,脱硫废水流入纳米催化电解絮凝气浮,在混凝沉淀池 2 中加入絮凝剂 FeSO4 ,每吨废水加入 800g 的 FeSO4 ,利用搅拌器 7 进行搅拌,加速沉淀;同时开通一级气浮池 3 中的溶气释放器 20 ,并调节适当的气体流量;电解气浮池 4 中电解槽 9 两极间的电压为3~5V ,电流密度为10~250mA/cm2 的状态,保持废水在一级气浮池 3 中的停留时间为5~15 ,且在电解槽 9 极板之间停留时间为2~5 钟,处理前后的效果见表 3 。The tannery wastewater enters the coarse grid filter to remove large particles of solids and then flows into the conditioning tank for mixing. The wastewater from the conditioning tank is pumped into the hydraulic screen to remove impurities such as hair and then flows into the desulfurization reaction tank. The desulfurized wastewater flows into the nano catalytic electrolysis flocculation gas. Floating, adding flocculant FeSO 4 to the coagulation sedimentation tank 2, adding 800 g of FeSO 4 per ton of waste water, stirring with a stirrer 7 to accelerate the precipitation; simultaneously opening the dissolved gas release device 20 in the first-stage air floating tank 3, and Adjusting the appropriate gas flow rate; the voltage between the two electrodes of the electrolysis cell 9 in the electrolysis floating cell 4 is 3 to 5 V, and the current density is 10 to 250 mA/cm 2 , and the residence time of the wastewater in the first-stage air floating cell 3 is 5~ 15 , and the residence time between the plates of the electrolytic cell 9 is 2 to 5 minutes, and the effects before and after the treatment are shown in Table 3.
表4对制革废水的处理效果 Table 4 treatment effect of tannery wastewater
序号Serial number CODCr ( mg/L ) COD Cr ( mg/L ) 氨氮 (mg/L) Ammonia nitrogen (mg/L) SS (mg/L) SS (mg/L) 色度 (倍)Chromaticity (times) pH值pH value
11 进水Influent 164164 12.312.3 22twenty two 120120 8.98.9
22 一级气浮后After the first level of air flotation 134134 1212 2020 111111 8.58.5
33 出水Water 7575 未检出not detected 1212 88 8.38.3
工业实用性Industrial applicability
本发明集电解、絮凝沉淀、气浮等多种功能为一体,自动化程度高,除污效率高,运行成本低,操作和维护方便 ,具有良好的工业实用性。 The invention integrates various functions such as electrolysis, flocculation and sedimentation, air flotation, etc., has high automation degree, high decontamination efficiency, low running cost, convenient operation and maintenance With good industrial applicability.

Claims (6)

  1. 一种纳米催化电解絮凝气浮装置,其特征在于设有壳体,在壳体内设有混凝沉淀池、一级气浮池、电解气浮池、排渣池四个池,混凝沉淀池顶部设有进水口和搅拌器,进水口通过管道与废水进水管道连接,混凝沉淀池底部与一级气浮池相通,边部排污口与排污管连接;在一级气浮池边部设有溶气释放管,溶气释放管与溶气释放器、外部气源连接,排污口与排污管连接,一级气浮池内侧上部与电解气浮池相通;电解气浮池由上下层隔板分为上下二层,上层气液分离室设有刮渣装置,上下层之间装有电解槽,设有至少一个电解槽,电解槽的底部固定在壳体内底部,电解槽的顶部敞开并与上下层隔板顶部水平,电解槽内安装有电极,电极包括阳极和阴极,阳极和阴极之间的间距为过水通道,所述阳极通过阳极接线柱与直流电源的阳极联接,所述阴极通过阴极接线柱与直流电源的阴极联接,排污口设置在排水沉淀室底部,集水管设置在排水沉淀室中间偏上位置,与电解出水管道连接;排渣池设有排渣口,排渣口与排渣管连接。 The invention relates to a nano catalytic electrolysis flocculation air flotation device, which is characterized in that a casing is arranged, and four tanks of a coagulation sedimentation tank, a first-stage air flotation tank, an electrolysis air flotation tank and a slag discharge tank are arranged in the shell, and the top of the coagulation sedimentation tank is provided. There is a water inlet and a stirrer, the water inlet is connected with the waste water inlet pipe through a pipeline, the bottom of the coagulation sedimentation tank is connected with the first-stage air floating pool, the side sewage outlet is connected with the sewage pipe; and the dissolved gas is provided at the edge of the first-stage air floating pool. The release tube, the dissolved gas release tube is connected with the dissolved gas release device and the external gas source, and the sewage outlet is connected with the sewage discharge pipe, and the inner upper portion of the first-stage air floating pool is connected with the electrolytic air floating pool; the electrolytic air floating pool is divided into upper and lower layers by the upper and lower partition plates. The upper gas-liquid separation chamber is provided with a scraping device, and an electrolytic cell is arranged between the upper and lower layers, and at least one electrolytic cell is provided. The bottom of the electrolytic cell is fixed at the bottom of the inner casing, and the top of the electrolytic cell is open and top of the upper and lower partition plates Horizontally, an electrode is installed in the electrolytic cell, the electrode includes an anode and a cathode, and a distance between the anode and the cathode is a water passage, and the anode is connected to an anode of a direct current power source through an anode terminal, and the cathode is connected The cathode connection post is connected with the cathode of the DC power source, the sewage outlet is arranged at the bottom of the drainage sedimentation chamber, and the water collection pipe is arranged at an upper position in the middle of the drainage sedimentation chamber, and is connected with the electrolysis water outlet pipe; the slag discharge tank is provided with a slag discharge port and a slag discharge port Connected to the slag discharge pipe.
  2. 如权利要求 1 所述的一种纳米催化电解絮凝气浮装置,其特征在于所述壳体由内、外两层构成,内层采用环氧沥青漆处理,外层为钢板。Claims 1 The nano-catalytic electrolytic flocculation air flotation device is characterized in that the shell is composed of inner and outer layers, the inner layer is treated with epoxy asphalt paint, and the outer layer is steel plate.
  3. 如权利要求 1 所述的一种纳米催化电解絮凝气浮装置,其特征在于所述电解槽内安装有电极,电极包括阳极和阴极,阳极和阴极之间的间距为 2mm~4mm ,电解槽内阳极与阴极顶部与电解槽顶部之间留有150mm~200mm 高度的间隙。Claims 1 The nano catalytic electrolysis flocculation air flotation device is characterized in that an electrode is installed in the electrolytic cell, the electrode comprises an anode and a cathode, and the spacing between the anode and the cathode is 2 mm to 4 mm. A gap of 150 mm to 200 mm is left between the anode and the top of the cathode and the top of the electrolytic cell in the electrolytic cell.
  4. 如权利要求 1 所述的一种纳米催化电解絮凝气浮装置,其特征在于所述阳极是以钛为基板,表面覆盖有晶粒为 10 ~ 35nm 的金属氧化物涂层的形稳阳极,阳极为平板状、圆弧状、圆筒状、网状中的一种形状;所述阴极是以钛、铁、铝、不锈钢、锌、铜、镍、铅或石墨为材料的阴极,阴极为平板状、圆弧状、圆筒状、网状中的一种形状。A nano-catalytic electrolytic flocculation air flotation device according to claim 1, wherein the anode is made of titanium as a substrate, and the surface is covered with crystal grains of 10 to 35 nm. The metal oxide coating has a stable anode, and the anode has a shape of a flat plate, an arc shape, a cylindrical shape, and a mesh shape; the cathode is titanium, iron, aluminum, stainless steel, zinc, copper, nickel The lead or graphite is a cathode of the material, and the cathode has one of a flat shape, an arc shape, a cylindrical shape, and a mesh shape.
  5. 如权利要求 1 所述的一种纳米催化电解絮凝气浮装置,其特征在于所述纳米催化电解絮凝气浮装置工作时电解槽中阳极与阴极间的工作电压为 2~8V ,电流密度为10~250mA/cm2A nano-catalytic electrolytic flocculation air flotation device according to claim 1, wherein the working voltage of the anode and the cathode in the electrolytic cell is 2~8V and the current density is 10 when the nano-catalytic electrolytic flocculation air flotation device is operated. ~250mA/cm 2 .
  6. 如权利要求 1 所述的一种纳米催化电解絮凝气浮装置,其特征在于所述纳米催化电解絮凝气浮装置工作时电解槽中两极间的最佳工作电压为3~5V ,最佳电流密度为100~150mA/cm2The nano-catalytic electrolytic flocculation air flotation device according to claim 1, wherein the optimal working voltage between the two electrodes in the electrolytic cell when the nano-catalytic electrolytic flocculation air flotation device is operated is 3 to 5 V, and the optimal current density is It is 100 to 150 mA/cm 2 .
PCT/CN2013/076545 2012-04-19 2013-05-31 Nano catalyst electrolysis flocculation air flotation device WO2013156002A1 (en)

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