CN210764779U - Sewage treatment equipment - Google Patents
Sewage treatment equipment Download PDFInfo
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- CN210764779U CN210764779U CN201920342888.5U CN201920342888U CN210764779U CN 210764779 U CN210764779 U CN 210764779U CN 201920342888 U CN201920342888 U CN 201920342888U CN 210764779 U CN210764779 U CN 210764779U
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Abstract
The application discloses sewage treatment equipment, which comprises a first container and a second container, wherein a waste water distributor (2), an aeration device (4) and a micro-electrolysis chamber (5) are sequentially arranged in the first container from bottom to top; the waste water distributor (2) is communicated with the outside of the first container through a water inlet (1); the aeration device (4) is communicated with the outside of the first container through an air inlet (3); the second capacitor is communicated with the first container through a wastewater inlet pipe (15), and a multi-medium material adding and mixing chamber (6), a homogeneous phase photocatalytic degradation chamber (7) and a photoelectrocatalysis reaction chamber (8) are arranged in the second capacitor. The sewage treatment device that this application embodiment provided carries out the oxidation treatment of waste water through jointly using little electrolytic oxidation technique, fenton oxidation technique and ultraviolet lamp photocatalytic oxidation technique, has solved the low and unstable problem of operation of reaction efficiency that conventional single catalysis, oxidation technique caused.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to sewage treatment equipment.
Background
The micro-electrolysis, Fenton reaction and photocatalysis advanced wastewater treatment technology has the advantages of novelty, high efficiency, no selectivity to wastewater and the like, is particularly suitable for degrading unsaturated hydrocarbon in industrial wastewater, has mild reaction conditions, does not cause secondary pollution, and has good application prospect. The working principle of the method is that a combined treatment process of iron-carbon micro-electrolysis-Fenton strong oxidation and a combined treatment process of homogeneous photocatalytic oxidation-heterogeneous photocatalytic oxidation are used. Homogeneous photocatalytic oxidation-heterogeneous photocatalytic oxidation techniques can all utilize the powder catalyst when present in organic wastewater. When the waste water mixed with the powder catalyst is irradiated by ultraviolet light with certain intensity, the waste water in the device can generate a certain amount of active oxygen and free radicals in various forms for many times. Because the active oxygen and the free radical have higher oxidation potential, the active oxygen and the free radical can act with COD and degrade the COD, and then the active oxygen and the free radical react into water and carbon dioxide, thereby achieving the aim of treating the waste water. The photocatalytic oxidation technology adopts the semiconductor material as a photocatalyst and is carried out at normal temperature and normal pressure, so that the wastewater treatment cost can be greatly reduced. More importantly, the micro-electrolysis, Fenton reaction and photocatalysis advanced wastewater treatment technology can degrade wastewater pollutants into non-toxic inorganic micromolecular substances such as CO2 and H2O and various corresponding inorganic ions without choice, thereby realizing harmless treatment of industrial wastewater pollution.
The existing sewage treatment equipment generally only has single functions of micro-electrolysis, Fenton reaction or photocatalysis treatment, and has the problems of short reaction time, low illumination intensity, poor wastewater treatment effect and the like.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the application provides a sewage treatment device to solve the problem that current sewage treatment device can not carry out micro-electrolysis, fenton reaction and photocatalytic treatment to sewage simultaneously.
The embodiment of the application provides sewage treatment equipment, which comprises a first container and a second container, wherein a waste water distributor, an aeration device and a micro-electrolysis chamber are sequentially arranged in the first container from bottom to top; the waste water distributor is communicated with the outside of the first container through a water inlet; the aeration device is communicated with the outside of the first container through an air inlet. The second capacitor is communicated with the first container through a water inlet pipe, and a multi-medium material adding and mixing chamber, a homogeneous phase photocatalytic degradation chamber and a photoelectric catalytic reaction chamber are arranged in the second capacitor.
Specifically, the sewage treatment equipment further comprises a micro-electrolysis material inlet, a micro-electrolysis material outlet and a sludge discharge outlet which are arranged on the first container; the micro-electrolysis material inlet is arranged at the top of the first container; the micro-electrolysis material outlet and the sludge discharge port are both arranged at the bottom of the first container.
Specifically, the micro-electrolysis chamber comprises a micro-electrolysis material layer and a micro-electrolysis material tray; the micro-electrolysis material layer and the micro-electrolysis material tray are both positioned at the bottom of the micro-electrolysis chamber, and the micro-electrolysis material layer is positioned above the micro-electrolysis material tray.
Specifically, the multi-media material adding and mixing chamber comprises: a medium A feeding hole, a medium B feeding hole, a medium C feeding hole and a waste water mixed liquid outlet; the medium A feed port, the medium B feed port and the medium C feed port are all arranged at the upper end of the multi-medium material adding and mixing chamber and are distributed at equal intervals; the waste water mixed liquid outlet is arranged in the center of the bottom of the multi-medium material adding and mixing chamber and is connected to a liquid distributor on the side surface of the middle upper part of the multi-medium material adding and mixing chamber through a pipeline; the multi-medium material adding and mixing chamber is cylindrical, and the medium A feed port, the medium B feed port and the medium C feed port all enter the multi-medium material adding and mixing chamber along tangent lines.
Specifically, the homogeneous photocatalytic degradation chamber and the liquid distributor are arranged at the same height, and an ultraviolet light source is arranged in the homogeneous photocatalytic degradation chamber.
Specifically, the photoelectrocatalysis reaction chamber is arranged below the multi-medium material adding and mixing chamber and the homogeneous phase photocatalysis degradation chamber; a plurality of detachable waste water flow layer plates are arranged in the photoelectrocatalysis reaction chamber, a waste water flow layer control plate is arranged at one end of each waste water flow layer plate, and a waste water guide plate is arranged at the other end of each waste water flow layer plate; the positions of the wastewater flowing layer control plates and the wastewater guide plates are alternately arranged on the adjacent wastewater flowing layer plates;
the height that the upper portion of waste water flow layer control panel protruded in waste water flow layer plate is 200mm, the height that the lower part of waste water flow layer control panel protruded in waste water flow layer plate is 200 mm.
Specifically, the number of the wastewater flow layer plates is more than or equal to 5, and the distance between every two adjacent wastewater flow layer plates is 300-400 mm; a plurality of groups of ultraviolet light sources are arranged above any one of the wastewater flowing layer plates; the distance between any of the wastewater flow laminae and its corresponding ultraviolet light source can be 50mm to 100 mm.
Specifically, a wastewater pH value detector is arranged at the top of the homogeneous phase photocatalytic degradation chamber.
Specifically, a plurality of exhaust ports are arranged on the side wall of the photoelectrocatalysis reaction chamber.
Specifically, a wastewater outlet is arranged at the bottom of the photoelectrocatalysis reaction chamber.
The sewage treatment device that this application embodiment provided carries out the oxidation treatment of waste water through jointly using little electrolytic oxidation technique, fenton oxidation technique and ultraviolet lamp photocatalytic oxidation technique, has solved the low and unstable problem of operation of reaction efficiency that conventional single catalysis, oxidation technique caused. The sewage treatment device provided by the embodiment of the application adopts the suspended catalyst to carry out photocatalytic oxidation reaction, and the wastewater after treatment is comprehensively treated due to the combined use of the micro-electrolysis technology and the Fenton oxidation technology, so that the defects of difficult separation and recovery of the catalyst existing in a single suspended catalytic reactor are overcome, the comprehensive operation cost of the device is low, the operation is simple and convenient, and the operation is stable. The light source that sewage treatment device that this application embodiment provided used all is artificial light source-ultraviolet lamp, and ultraviolet tube passes through the flexible coupling and fixes with the device box, is convenient for install, change and wash. In the sewage treatment device that this application embodiment provided, all seted up the ventilation hole on little electrolysis part, fenton and the light catalytic oxidation processing apparatus, be convenient for in time get rid of the various waste gases that produce in the oxidation COD process (waste gas is introduced waste gas absorption system by the special pipeline). In addition, the sewage treatment device that this application embodiment provided can be according to handling water yield, water quality characteristic is nimble to be adjusted water supply and drainage, can be according to the concentration and the water yield of waste water, and series connection or parallelly connected use also can ally oneself with other effluent treatment plant and ally oneself with, is particularly suitable for the catalytic oxidation treatment to high concentration difficult degradation organic waste water.
Drawings
The features and advantages of the present application will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the present application in any way, and in which:
fig. 1 shows a schematic configuration diagram of a specific example of a sewage treatment apparatus in the embodiment of the present application.
Wherein, 1-a water inlet, 2-a waste water distributor, 3-a gas inlet, 4-an aeration device, 5-a micro-electrolysis chamber, 6-a multi-medium material adding and mixing chamber, 7-a homogeneous phase photocatalytic degradation chamber, 8-a photoelectrocatalysis reaction chamber, 9-a micro-electrolysis material inlet, 10-a micro-electrolysis material outlet, 11-a sludge discharge outlet, 12-a micro-electrolysis material tray, 13-a water outlet pipe, 14-a gas outlet, 15-a waste water inlet pipe, 16-a medium A feed inlet, 17-a medium B feed inlet, 18-a medium C feed inlet, 19-a waste water mixed liquid outlet, 20-a liquid distributor, 21-an ultraviolet light source, 22-an ultraviolet lamp tube fixing and sealing device, 23-a gas outlet and 24-a waste water PH value detector, 25-wastewater guide plate, 26-wastewater flowing layer control plate, 27-wastewater turbulence manufacturing device, 28-wastewater flowing layer plate, 29-ultraviolet light source reflector, 30-supporting framework stainless steel pipe, and 31-wastewater outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The iron-carbon micro-electrolysis technology is a good process for treating wastewater by using a metal corrosion principle to form a galvanic cell, and is also called an internal electrolysis method, an iron scrap filtration method and the like. Under the condition of no power supply, the iron-carbon micro-electrolysis material filled in the wastewater generates 1.2V potential difference to carry out electrolysis treatment on the wastewater so as to achieve the purpose of degrading organic pollutants.
The principle of the reaction is that iron is corroded and becomes ferrous iron ions which enter the solution. In order to increase the potential difference and promote the release of iron ions, copper powder or lead powder is added into the iron-carbon bed in a certain proportion. The iron with low potential becomes an anode, the carbon with high potential becomes a cathode, and electrochemical reaction occurs under the acidic oxygenation condition, and the reaction process is as follows:
anode (Fe): fe-2e → Fe2+,
cathode (C): 2H + +2e → 2[ H ] → H2,
during the reaction, nascent Fe2+ and atomic H are produced, which have high chemical activity and can change the structure and characteristics of many organic matters in waste water to make the organic matters generate the functions of chain scission, ring opening and the like. The main functions of the micro-electrolysis material are oxidation reduction and electric adsorption, the main components of the micro-electrolysis material are iron and carbon, when the micro-electrolysis material is immersed in an electrolyte solution, a countless micro-battery system can be formed due to the 1.2V electrode potential difference between Fe and C, an electric field is formed in the action space of the micro-battery system, and a large amount of Fe2+ generated by anode reaction enters wastewater and is further oxidized into Fe3+ to form a flocculating agent with high adsorption flocculation activity. The cathode reaction generates a large amount of nascent state [ H ] and [ O ], under the condition of weak acidity, the active components can generate oxidation reduction reaction with a plurality of components in the wastewater, so that organic macromolecules are subjected to chain scission degradation, the COD (chemical oxygen demand), particularly the chromaticity of the printing and dyeing wastewater, is eliminated, the biochemical degree of the wastewater is improved, and the cathode reaction consumes a large amount of H + to generate a large amount of OH < - >, so that the pH value of the wastewater is also improved.
The fenton reaction technology is a chemical catalytic oxidation reaction, and is generally used as a treatment process of waste water containing high-concentration and difficultly-degraded COD (chemical oxygen demand) because the fenton reaction technology has strong oxidation capacity, low requirements on reaction conditions and no secondary pollution to products, and is also called as a fenton oxidation method. The principle of Fenton reaction is a chain reaction between ferrous ions (Fe2+) and hydrogen peroxide, HO < - > is catalyzed and decomposed by Fe2 < + > to generate OH < - > hydroxyl free radicals, OH < - > has stronger oxidizing power, and the oxidation potential of the OH < - > is second to that of fluorine and is as high as 2.80V. In addition, the hydroxyl free radical has high electronegativity or electrophilicity, and the electron affinity of the hydroxyl free radical reaches 569.3kJ, so that the hydroxyl free radical has strong addition reaction characteristics, and the Fenton reaction can indiscriminately oxidize most of COD in the wastewater, improve the biodegradability of the wastewater, and is particularly suitable for organic wastewater treatment which is difficult to biodegrade or generally difficult to chemically oxidize.
The photocatalytic oxidation technology is developed on the basis of photochemical oxidation technology, is a reaction process for oxidizing and degrading organic pollutants under the action of visible light or ultraviolet light, and is an advanced oxidation technology which is researched more at present. Because of the limited reaction conditions, photochemical oxidation degradation is not thorough enough, and various aromatic organic intermediates are easy to generate, and the efficiency of photochemical oxygen can be greatly improved by combining with a photocatalytic oxidant. It uses semiconductor material as catalyst to convert the light energy existed in nature into the energy required by chemical reaction to produce catalytic action, and makes the surrounding oxygen and water molecules be excited into free negative ions with high oxidation power.
The photocatalyst is a substance which does not change under the irradiation of light and can promote chemical reaction, and the catalyst can generate active species such as hydroxyl free radical, superoxide free radical and the like under the irradiation of sunlight, and is like chlorophyll in the photosynthesis of plants. Almost all COD substances and partial inorganic substances harmful to human bodies and environment can be decomposed, not only can the reaction be accelerated, but also the in the nature can be applied, and the resource waste and the additional pollution are not caused. The most representative example is "photosynthesis" of plants, which absorbs carbon dioxide toxic to animals and converts light energy into oxygen and water.
The reactor types are divided into two types according to the photocatalytic oxidation technology, namely a flat plate type reactor of a catalyst immobilization technology and a suspension system photocatalytic oxidation reactor adopting a powder catalyst.
1. A flat plate reactor which uses natural light (sunlight) as an irradiation light source and adopts a catalyst immobilization technology; it has the following disadvantages: A. photocatalysts, which do not directly participate in the degradation reaction, convert water or oxygen into strongly oxidative reactive groups by absorbing light energy, which degrade contaminants and must therefore be in direct contact with water or oxygen molecules. Thus, it is the effective contact concentration, i.e., the concentration of photocatalyst that can be contacted with wastewater or air, that determines the performance of the photocatalyst, rather than a simple overall concentration of catalyst. B. One characteristic of the flat plate reactor is that the catalyst is fixed on the surface of the flat plate, thus greatly reducing the specific surface area of the catalyst which can be used for catalytic reaction, leading the effective contact concentration of the catalyst to be very low and greatly reducing the removal rate of pollutants by the reactor; C. the flat-plate reactor mostly utilizes a solar light source, and the proportion of ultraviolet rays capable of triggering photocatalytic oxidation reaction in sunlight is very low (about 4 percent), thereby greatly limiting the reaction speed.
2. The suspension system photocatalytic oxidation reactor which uses an artificial light source (ultraviolet lamp) as an irradiation light source and adopts a powder catalyst is adopted. It has the following advantages: A. because the catalyst is in a suspension state, catalyst particles can be as small as possible (a nano-scale powdery catalyst is generally selected), and the specific surface area of the particles is increased; B. the utilization efficiency of the surface of the catalyst particles is increased, the probability of the contact of the surface of the catalyst particles and pollutants is increased, and the removal rate of the pollutants by the reactor is greatly higher than that of the first type reactor. C. The suspended reactor mainly utilizes the ultraviolet light source with special wave band, the suspended catalyst can be contacted with the light source in all directions, and the catalytic reaction can be carried out under the irradiation of the ultraviolet light source with special wave band, so that the 10-30 times of light source effect can be amplified, the COD oxidation reaction rate in the wastewater is greatly improved, and the COD purification efficiency is improved.
A micro-electrolysis, Fenton reaction and photo-oxidation catalysis integrated wastewater treatment technology belongs to the technical field of electrolysis chemical water treatment. The technology has the advantages of novelty, high efficiency, no selectivity to wastewater and the like, is particularly suitable for degrading unsaturated hydrocarbon, has mild reaction conditions, does not cause secondary pollution, and has good application prospect. The utility model is mainly characterized in that the iron-carbon micro-electrolysis-Fenton strong oxidation combined treatment process is used, and the homogeneous photocatalytic oxidation-heterogeneous photocatalytic oxidation technology combined treatment process is used. The working principle is that when semiconductor powder catalyst exists in organic waste water, homogeneous photocatalytic oxidation-heterogeneous photocatalytic oxidation technology can be comprehensively utilized, after ultraviolet light with certain intensity irradiates, a certain amount of active oxygen and free radicals with various forms can be generated in the waste water of the device for many times, and the active oxygen and the free radicals have higher oxidation potential, so that the active oxygen and the free radicals can react with COD (chemical oxygen demand) and degrade the COD, and further mineralize the active oxygen and the free radicals into water and carbon dioxide, thereby achieving the purpose of treatment. The photocatalysis process adopts semiconductor material as photocatalyst and is carried out at normal temperature and normal pressure, thus greatly reducing the cost of wastewater treatment. More mainly relates to micro-electrolysis, Fenton reaction and photocatalysis advanced wastewater treatment technology, which can degrade pollutants into nontoxic inorganic small molecular substances such as CO2、H2O and various corresponding inorganic ions to realize harmlessness, and provides a new and potential way for treating water pollution.
In view of this, the present embodiment provides a sewage treatment apparatus, as shown in fig. 1, which may include a first container and a second container, wherein the first container is internally provided with a waste water distributor 2, an aeration device 4, and a micro-electrolysis chamber 5 in sequence from bottom to top; the waste water distributor 2 is communicated with the outside of the first container through a water inlet 1; the aeration means 4 communicates with the outside of the first container through the air inlet 3.
The second capacitor is communicated with the first container through a water inlet pipe 15, and a multi-medium material adding and mixing chamber 6, a homogeneous phase photocatalytic degradation chamber 7 and a photoelectrocatalysis reaction chamber 8 are arranged in the second capacitor. In one embodiment, the wastewater inlet pipe 15 is horizontally arranged tangentially with the multimedia material adding and mixing chamber 6.
Preferably, the sewage treatment apparatus further comprises a micro-electrolysis material inlet 9, a micro-electrolysis material outlet 10 and a sludge discharge port 11 provided on the first container; the inlet 9 for the micro-electrolytic material is arranged at the top of the first container; the micro-electrolysis material outlet 10 and the sludge discharge port 11 are both disposed at the bottom of the first container.
Preferably, the micro-electrolysis chamber 5 comprises a micro-electrolysis material layer 5 and a micro-electrolysis material tray 12; the micro-electrolysis material layer 5 and the micro-electrolysis material tray 12 are both located at the bottom of the micro-electrolysis chamber 5, and the micro-electrolysis material layer 5 is located above the micro-electrolysis material tray 12.
In one embodiment, the waste water distributor 2 is communicated with a water inlet pipe in the micro-electrolysis chamber 5, the waste water distributor 2 is horizontally arranged, the bottom of the waste water distributor 2 is provided with small holes, and the number of the waste water distributors 2 is more than or equal to one. The more 500mm the aeration means 4 is above the bottom surface of the micro electrolysis chamber 5.
Preferably, the multi-media material adding and mixing chamber 6 comprises: a medium A feed port 16, a medium B feed port 17, a medium C feed port 18 and a wastewater mixed liquid outlet 19; the medium A feed port 16, the medium B feed port 17 and the medium C feed port 18 are all arranged at the upper end of the multi-medium material adding and mixing chamber 6 and are distributed at equal intervals; the waste water mixed liquid outlet 19 is arranged at the center of the bottom of the multimedia material adding and mixing chamber 6 and is connected to a liquid distributor 20 on the side surface of the middle upper part of the multimedia material adding and mixing chamber 6 through a pipeline; the multi-medium material adding and mixing chamber 6 is cylindrical, and the medium A feed port 16, the medium B feed port 17 and the medium C feed port 18 all enter the multi-medium material adding and mixing chamber 6 along a tangent line, so that materials are mixed fully.
Preferably, the homogeneous photocatalytic degradation chamber 7 and the liquid distributor 20 are disposed at the same height, and an ultraviolet light source 21 is disposed in the homogeneous photocatalytic degradation chamber 7. The homogeneous photocatalytic degradation chamber 7 is made of Fe2+ or Fe3+H2O2As a medium, the uv light source 21 helps the fenton reaction to generate hydroxyl radicals, which degrade the contaminants. The ultraviolet light source 21 is immersed in the sewage liquid phase, so that the photons generated by the ultraviolet light source can be more effectively utilized by the catalyst, the generation speed of hydroxyl free radicals is increased, COD is promoted to form a large amount of activated molecules, and the treatment efficiency of the organic pollutants difficult to degrade is improved.
Preferably, the photoelectrocatalysis reaction chamber 8 is arranged below the multimedia material adding and mixing chamber 6 and the homogeneous phase photocatalysis degradation chamber 7; a plurality of detachable waste water flow layer plates 28 are arranged in the photoelectrocatalysis reaction chamber 8, one end of each waste water flow layer plate 28 is provided with a waste water flow layer control plate 26, and the other end of each waste water flow layer plate 28 is provided with a waste water guide plate 25; on the adjacent waste water flow layer plate 28, the positions of the waste water flow layer control plates 26 and the waste water guide plates 25 are alternately arranged; the height of the upper part of the wastewater flowing layer control plate 26 protruding out of the wastewater flowing layer plate 28 is 200mm, and the height of the lower part of the wastewater flowing layer control plate 26 protruding out of the wastewater flowing layer plate 28 is 200 mm. In a particular embodiment of the method of the present invention,
the wastewater flow layer plates 28 of each layer are made of mirror-grade stainless steel plates with the thickness of 1.0-2.0mm, the wastewater flow layer plate of the upper layer can be used as the ultraviolet light source reflecting plate 29 of the wastewater flow layer plate 28 of the lower layer, and the distance between the wastewater flow layer plate reflecting plate 29 of each layer and the ultraviolet light source 21 is 50-100 mm.
The support framework of each layer of wastewater flow laminate 28 is made of mirror stainless steel tubes by welding. The distance between the stainless steel pipes is 400mm and 500 mm; the turbulence creating means 27 of the waste water flow layer plate 28 of each layer are fixed on the stainless steel pipe 30 of the support frame, and the distance between the turbulence creating means 27 is about 400mm and 500 mm.
In one embodiment, the UV light source 21 is disposed in the UV tube fixture and sealing fixture 22, and the fixture and sealing fixture 22 is attached to a high quality soft nylon or soft rubber 22, either on top of the liquid or submerged in the liquid.
Preferably, the number of the wastewater flow layers 28 is more than or equal to 5, and the distance between the adjacent wastewater flow layers 28 is 300mm to 400 mm; a plurality of groups of ultraviolet light sources 21 are arranged above any wastewater flowing layer plate 28; the distance between any of the wastewater flow laminae 28 and its corresponding ultraviolet light source 21 may be from 50mm to 100 mm.
Preferably, a wastewater pH value detector 24 is arranged at the top of the homogeneous photocatalytic degradation chamber 7.
Preferably, a plurality of exhaust ports 23 are formed on the sidewall of the photoelectrocatalysis reaction chamber 8.
Preferably, the bottom of the photoelectrocatalysis reaction chamber 8 is provided with a waste water outlet 31.
The sewage treatment equipment that this application embodiment provided has overcome simultaneously that reaction time is short, illumination intensity is low, the poor scheduling problem of treatment waste water effect among equipment such as current single microelectrolysis, fenton reaction, photocatalysis. The utility model provides a sewage treatment device adopts the little electrolysis of iron carbon-fenton strong oxidation combined treatment technology, and homogeneous phase photocatalytic oxidation-heterogeneous photocatalytic oxidation technology combined treatment technology cooperates the parallelly connected use of multilayer ultraviolet lamp, increases the multi-medium raw materials component and synthesizes and utilize simultaneously, can effectively utilize sewage treatment device's space, enlarges the waste water treatment scope, increases the length and the illumination time that waste water flows, improves waste water reaction rate, reinforcing waste water treatment effect.
The sewage treatment equipment provided by the embodiment of the application also overcomes the problems that an ultraviolet lamp tube is easy to pollute, the service life is short, the catalysis efficiency is low and the like in the existing wastewater photocatalysis device, and the novel photocatalysis technology device for deeply treating the wastewater is invented and has the advantages that the lamp tube is separated from the wastewater and is not easy to pollute, a plurality of layers of ultraviolet lamp sets are connected in series to catalyze the wastewater, and a plurality of media are combined for comprehensive utilization.
The sewage treatment equipment provided by the embodiment of the application adopts an iron-carbon micro-electrolysis-Fenton strong oxidation combined treatment process. The utility model discloses little electrolysis and fenton strong oxidation allies oneself with uses technology, for little electrolysis, more can effectually get rid of the complicated waste water of composition especially have more obvious advantage to CODCr, biodegradability. Compared with the addition in the Fenton oxidation technologyFe2+Not only saves the cost of the medicament, but also achieves the purpose of treating wastes with processes of wastes against one another. The micro-electrolysis and Fenton reaction combined process can effectively oxidize and decompose COD, improve the biodegradability of the wastewater and simultaneously have very obvious decoloration and odor removal effects.
Adding H2O2 after the iron-carbon micro-electrolysis reaction, and generating Fe by anode reaction2+Can be used as catalyst for subsequent catalytic oxidation treatment, i.e. Fe2+And H2O2Forming a Fenton reaction oxidation system. Nascent state generated by cathode reaction [ H]Can generate oxidation reduction reaction with a plurality of components in the waste water, destroy chromophoric groups (such as azo groups) in dye intermediate molecules and decolor the dye intermediate molecules. Through the iron-carbon aeration reaction, a large amount of hydrogen ions are consumed, so that the pH value of the wastewater is increased, and conditions are created for subsequent catalytic oxidation treatment.
The sewage treatment equipment provided by the embodiment of the application adopts a homogeneous photocatalytic oxidation-heterogeneous photocatalytic oxidation combined treatment process: (1) the homogeneous photocatalytic degradation is Fe2+Or Fe3+And H2O2As a medium, the pollutants are degraded by generating hydroxyl radicals through a photo-Fenton reaction. The ultraviolet ray can improve the effect of oxidation reaction and is an effective catalyst. UV-Fe2+Or Fe3+And H2O2In combination, the generation speed of hydroxyl free radicals can be increased, and COD can be promoted to form a large amount of activated molecules, so that the treatment efficiency of the organic pollutants difficult to degrade can be improved. (2) Heterogeneous photocatalytic degradation is achieved by irradiating certain semiconductor photocatalysts with energy band structures, such as TiO, with light2、ZnO、CdS、WO3、SrTiO3、Fe2O3Etc., can induce the generation of hydroxyl radicals. In the aqueous solution, under the action of the semiconductor photocatalyst, water molecules generate hydroxyl radicals with extremely strong oxidizing capability, and can oxidize and decompose various COD. And promotes COD to form a large amount of activated molecules so as to improve the treatment efficiency of the organic pollutants difficult to degrade.
The suspension system photocatalytic oxidation reactor designed by the sewage treatment equipment provided by the embodiment of the application selects the ultraviolet light source with a special waveband, and under the irradiation of the high-energy ultraviolet light source with the special waveband, the catalytic reaction can amplify 10-30 times of light source effect, so that the COD oxidation reaction rate in the wastewater is greatly improved, the COD oxidation reaction rate is enabled to be oxidized into micromolecular compounds more quickly, and the COD purification efficiency is improved.
The suspension system photocatalytic oxidation reactor designed by the sewage treatment equipment provided by the embodiment of the application overcomes the defects existing in the separation and continuous operation of the suspension system photocatalyst. The ultraviolet lamp is directly and reasonably arranged in the reactor, and the wastewater to be treated is approached to the maximum extent, so that the photons generated by the ultraviolet lamp can be effectively utilized by the catalyst. At the same time, the molecular chain of organic or inorganic high-molecular compound is reacted under the irradiation of high-energy ultraviolet beam to produce low-molecular compound, such as CO, by using the nano semiconductor catalyst with strongest activity and highest reaction efficiency after special treatment2、H2O, and the like. After the high-concentration COD wastewater is treated by the device, a more ideal purification effect can be achieved.
Although the embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the application, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. The sewage treatment equipment is characterized by comprising a first container and a second container, wherein a waste water distributor (2), an aeration device (4) and a micro-electrolysis chamber (5) are sequentially arranged in the first container from bottom to top; the waste water distributor (2) is communicated with the outside of the first container through a water inlet (1); the aeration device (4) is communicated with the outside of the first container through an air inlet (3); the second capacitor is communicated with the first container through a wastewater inlet pipe (15), and a multi-medium material adding and mixing chamber (6), a homogeneous phase photocatalytic degradation chamber (7) and a photoelectrocatalysis reaction chamber (8) are arranged in the second capacitor.
2. The sewage treatment apparatus according to claim 1, further comprising a micro-electrolysis material inlet (9), a micro-electrolysis material outlet (10) and a sludge discharge port (11) provided on the first container; the inlet (9) for the micro-electrolytic material is arranged at the top of the first container; the micro-electrolysis material outlet (10) and the sludge discharge port (11) are both arranged at the bottom of the first container.
3. The wastewater treatment plant according to claim 2, characterized in that the micro-electrolysis chamber (5) comprises a layer of micro-electrolysis material and a tray (12) of micro-electrolysis material; the micro-electrolysis material layer and the micro-electrolysis material tray (12) are both positioned at the bottom of the micro-electrolysis chamber (5), and the micro-electrolysis material layer is positioned above the micro-electrolysis material tray (12).
4. Sewage treatment plant according to claim 3, characterised in that said multimedia material adding and mixing chamber (6) comprises: a medium A feed port (16), a medium B feed port (17), a medium C feed port (18) and a waste water mixed liquid outlet (19);
the medium A feed port (16), the medium B feed port (17) and the medium C feed port (18) are all arranged at the upper end of the multi-medium material adding and mixing chamber (6) and are distributed at equal intervals; the waste water mixed liquid outlet (19) is arranged in the center of the bottom of the multi-medium material adding and mixing chamber (6) and is connected to a liquid distributor (20) on the side surface of the middle upper part of the multi-medium material adding and mixing chamber (6) through a pipeline;
the multi-medium material adding and mixing chamber (6) is cylindrical, and the medium A feed port (16), the medium B feed port (17) and the medium C feed port (18) all enter the multi-medium material adding and mixing chamber (6) along a tangent line.
5. The wastewater treatment plant according to claim 4, wherein the homogeneous photocatalytic degradation chamber (7) is arranged at the same height as the liquid distributor (20), and the homogeneous photocatalytic degradation chamber (7) is provided with an ultraviolet light source (21).
6. The wastewater treatment plant according to claim 5, characterized in that the photoelectrocatalysis reaction chamber (8) is arranged below the multimedia material adding and mixing chamber (6) and the homogeneous photocatalytic degradation chamber (7); a plurality of detachable waste water flowing layer plates (28) are arranged in the photoelectrocatalysis reaction chamber (8), one end of each waste water flowing layer plate (28) is provided with a waste water flowing layer control plate (26), and the other end of each waste water flowing layer plate (28) is provided with a waste water guide plate (25); the positions of the waste water flowing layer control plates (26) and the waste water guide plates (25) are alternately arranged on the adjacent waste water flowing layer plates (28);
the height of the upper part of the waste water flowing layer control plate (26) protruding out of the waste water flowing layer plate (28) is 200mm, and the height of the lower part of the waste water flowing layer control plate (26) protruding out of the waste water flowing layer plate (28) is 200 mm.
7. The sewage treatment apparatus according to claim 6, wherein the number of the wastewater flow floors (28) is 5 or more, and a distance between adjacent wastewater flow floors (28) is 300mm to 400 mm; a plurality of groups of ultraviolet light sources (21) are arranged above any wastewater flowing laminate (28); the distance between any of the wastewater flow laminae (28) and its corresponding ultraviolet light source (21) may be from 50mm to 100 mm.
8. The wastewater treatment plant according to claim 7, characterized in that the top of the homogeneous photocatalytic degradation chamber (7) is provided with a wastewater pH detector (24).
9. The wastewater treatment plant according to claim 8, characterized in that the side wall of the photoelectrocatalytic reaction chamber (8) is provided with a plurality of exhaust ports (23).
10. Sewage treatment plant according to claim 9, characterised in that the bottom of said photo-catalytic reaction chamber (8) is provided with a waste water outlet (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920342888.5U CN210764779U (en) | 2019-03-06 | 2019-03-06 | Sewage treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920342888.5U CN210764779U (en) | 2019-03-06 | 2019-03-06 | Sewage treatment equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210764779U true CN210764779U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920342888.5U Expired - Fee Related CN210764779U (en) | 2019-03-06 | 2019-03-06 | Sewage treatment equipment |
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