CN213569936U - Wastewater treatment system - Google Patents
Wastewater treatment system Download PDFInfo
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- CN213569936U CN213569936U CN202022406343.1U CN202022406343U CN213569936U CN 213569936 U CN213569936 U CN 213569936U CN 202022406343 U CN202022406343 U CN 202022406343U CN 213569936 U CN213569936 U CN 213569936U
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Abstract
The utility model provides a wastewater treatment system belongs to waste water treatment technical field, include: a pre-oxidation unit having a wastewater inlet; the electro-Fenton unit comprises an electro-Fenton body communicated with the pre-oxidation unit and an electrode plate group arranged in the electro-Fenton body, wherein the electrode plate group is used for conducting electricity and filling iron-carbon filler, and the electro-Fenton body is provided with a wastewater outlet; the ozone generating unit is communicated with the electro-Fenton body; wherein, wastewater treatment system forms the waste water route from waste water inlet to waste water delivery port, from the first oxidation gas circuit of electricity fenton body to preoxidation unit to and from the ozone generation unit to the second oxidation gas circuit of electricity fenton body. The technical effects are as follows: by utilizing multiple oxidation reactions formed by combining the pre-oxidation unit, the electro-Fenton unit and the ozone generation unit, organic matters in the high-salinity wastewater are basically mineralized, the COD removal rate and the chromaticity removal rate are greatly improved, and the wastewater treatment efficiency can be effectively improved.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, more specifically say, relate to a waste water treatment system.
Background
In the treatment of wastewater such as domestic wastewater, industrial wastewater and the like, the traditional wastewater treatment process can mainly remove suspended matters, colloids, bacteria and the like in water, and organic matters dissolved in water are difficult to remove. Therefore, the high-grade oxidation technology is usually adopted for removing, and the method can be applied to high-salinity wastewater such as coking wastewater, pharmaceutical wastewater and the like.
The pure ozone oxidation treatment process has selectivity, has a good treatment effect on unsaturated organic matters and aromatic compounds in the wastewater, but has a poor treatment effect on organic matters such as small molecular fatty acid and the like, and is difficult to completely mineralize and decompose the organic matters. The pure Fenton oxidation treatment process has the problems of low yield of free radicals, incomplete mineralization and the like.
Therefore, how to provide a wastewater treatment system capable of effectively removing organic substances in wastewater is an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a wastewater treatment system aims at solving the technical problem of how to get rid of waste water organic matter effectively.
In order to achieve the above object, the utility model adopts the following technical scheme: there is provided a wastewater treatment system comprising: a pre-oxidation unit having a wastewater inlet; the electro-Fenton unit comprises an electro-Fenton body communicated with the pre-oxidation unit and an electrode plate group arranged in the electro-Fenton body, wherein the electrode plate group is used for conducting electricity and filling iron-carbon filler, and the electro-Fenton body is provided with a wastewater outlet; the ozone generating unit is communicated with the electro-Fenton body; the wastewater treatment system is formed from the wastewater inlet to the wastewater water path of the wastewater outlet, from the electro-Fenton body to the first oxidation gas path of the pre-oxidation unit, and from the ozone generation unit to the second oxidation gas path of the electro-Fenton body.
Further, the pre-oxidation unit with be equipped with the constitution between the electro-Fenton body the water route siphunculus in waste water route, the electro-Fenton body with be equipped with the constitution between the pre-oxidation unit the first gas circuit siphunculus of first oxidation gas circuit, ozone generating unit extremely be equipped with the constitution between the electro-Fenton body the second gas circuit siphunculus of second oxidation gas circuit.
Furthermore, the water path through pipe, the first air path through pipe and the second air path through pipe are all provided with on-off control valves.
Furthermore, the first air passage pipe is arranged at a position of the electric Fenton body higher than that of the second air passage pipe.
Further, the pre-oxidation unit comprises a pre-oxidation body with the wastewater inlet, and a first gas distribution component communicated with the first gas passage pipe is arranged in the pre-oxidation body.
Further, a second gas distribution component communicated with the second gas path through pipe is arranged in the electro-Fenton body, and the second gas distribution component is arranged close to the iron-carbon filler.
Further, the pre-oxidation unit comprises a pre-oxidation body with the wastewater inlet, and the ratio of the height to the diameter of the pre-oxidation body is 4:1 to 8: 1.
Further, the bottom of the electro-Fenton body is also provided with at least one sludge discharge hopper.
Further, the electro-Fenton body still is equipped with and is used for clearing up the manhole of mud bucket.
Further, the electrode plate group comprises at least one group of cathodes and anodes which are arranged alternately in sequence, and the iron-carbon filler is filled between the cathodes and the anodes.
The utility model provides a wastewater treatment system has following technological effect at least: compared with the prior art, in the wastewater treatment system provided by the utility model, high-salinity wastewater is firstly introduced into the pre-oxidation unit, oxygen and ozone transmitted from the first oxidation gas path can carry out primary oxidation treatment on the high-salinity wastewater, so as to realize primary removal of COD (chemical oxygen demand) and primary removal of chromaticity of the high-salinity wastewater; it is internal that the high salt waste water through preliminary oxidation treatment gets into electro-fenton, oxygen and ozone from second oxidation gas circuit conveying can make waste water when passing through electrode plate group, take place the little electrolytic reaction of iron carbon with the iron carbon filler simultaneously, take place oxidation reaction with ozone, take place anodic oxidation reaction at anode cell board, take place catalytic oxidation reaction with the ferric ion that the hydrogen peroxide solution that the negative pole produced and iron carbon filler provided, realize the quadruple oxidation reaction, make the organic matter in the high salt waste water basically mineralize, COD clearance and colourity desorption rate have been improved greatly, can improve the treatment effeciency of waste water effectively.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wastewater treatment system according to an embodiment of the present invention.
In the figure:
100. a wastewater treatment system 110, a pre-oxidation unit 112, a wastewater inlet
120. electro-Fenton unit 121, electro-Fenton body 122 and electrode plate group
123. Iron carbon filler 124, second gas distribution component 125 and mud bucket
126. Waste water outlet 130, ozone generating unit 140, water channel through pipe
150. The first air passage tube 160 and the second air passage tube
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Referring to fig. 1, a wastewater treatment system 100 according to an embodiment of the present invention will now be described.
The embodiment of the utility model provides a wastewater treatment system 100, include: a pre-oxidation unit 110 having a wastewater inlet 112; the electro-Fenton unit 120 comprises an electro-Fenton body 121 communicated with the pre-oxidation unit 110 and an electrode plate group 122 arranged in the electro-Fenton body 121, wherein the electrode plate group 122 is used for conducting and filling iron-carbon filler 123, and the electro-Fenton body 121 is provided with a wastewater outlet 126; and an ozone generating unit 130 communicated with the electro-Fenton body 121; the wastewater treatment system 100 includes a wastewater channel a from the wastewater inlet 112 to the wastewater outlet 126, a first oxidation channel B from the electro-Fenton body 121 to the pre-oxidation unit 110, and a second oxidation channel C from the ozone generation unit 130 to the electro-Fenton body 121.
It should be noted that the pre-oxidation unit 110 may be provided with a control valve for controlling the on-off of the wastewater at the wastewater inlet 112, and may also be provided with a pump body for pumping water, and the pre-oxidation unit 110 may be filled with a filler or a catalyst. The electro-Fenton body 121 can be provided with a pump body for pumping water at the wastewater outlet 126, and can also be provided with a water purification unit and a wastewater recycling tank. The iron-carbon filler 123 in the electro-fenton body 121 can be normally replaced according to the service life thereof to ensure a good treatment effect. The electrode plate group 122 is connected to a control power source to control the electrolytic reaction. The ozone generating unit 130 may be a pure oxygen source or an oxygen-rich source generating device, providing ozone and oxygen.
In the embodiment of the present invention, the treatment process of the wastewater treatment system 100 is specifically: firstly, high-salinity wastewater enters the pre-oxidation unit 110 from the wastewater inlet 112, and gas coming out of the electro-Fenton body 121 enters the pre-oxidation unit 110 through the first oxidation gas path B to be fully mixed with the wastewater therein to directly generate a pre-oxidation reaction or indirectly generate an oxidation reaction together with a catalyst. The process can carry out primary oxidation on the wastewater, and realize the first removal of COD and chromaticity of the wastewater.
Next, the pre-oxidation unit 110 introduces the wastewater after the preliminary oxidation into the electro-Fenton body 121. Ozone and oxygen generated by the ozone generating unit 130 enter the electro-Fenton body 121 through the second oxidation gas path C. Firstly, ozone has an oxidizing effect and can generate an oxidizing reaction with wastewater; secondly, oxygen reacts near the cathode of the electrode plate group 122 to generate hydrogen peroxide, the higher the oxygen concentration is, the higher the hydrogen peroxide generating efficiency is, and meanwhile, the oxygen reacts with the iron-carbon filler 123 in the wastewater to form iron-carbon micro-electrolysis; thirdly, ferric ions generated by iron-carbon micro-electrolysis catalyze hydrogen peroxide generated by a cathode to generate hydroxyl radicals, so that the hydrogen peroxide has strong oxidation effect; fourth, hydroxyl radicals can also be generated by anodic oxidation reactions occurring at the anodes of the electrode plate groups 122. In the process, multiple oxidation treatment can be carried out on organic matters in the wastewater, and more organic polymers are adsorbed by flocculent precipitates formed by ferrous ions and ferric ions, so that most of the organic matters in the wastewater are mineralized, and the COD removal rate and the chroma removal rate are obviously improved.
Finally, the wastewater after the secondary oxidation treatment is discharged out of the electro-Fenton body 121 from the wastewater outlet 126.
So set up, realized the perfect combination of pre-oxidation treatment, ozone treatment and electro-Fenton processing, not only increased ozone oxidation efficiency, still make full use of the oxygen in the ozone improve electro-Fenton and produce hydrogen peroxide solution efficiency, provide oxygen for the little electrolysis of iron carbon simultaneously. In the electro-Fenton unit 120, not only the hydrogen peroxide is generated by electrolysis, but also the needed catalyst iron ions are provided by the iron-carbon filler 123, so that the hydrogen peroxide and the iron ion catalyst are all originated from the inside of the system and are different from the ordinary Fenton which needs to be added. The ozone type electro-Fenton treatment mode can be flexibly adjusted according to the requirements of the water quality of inlet water and the water quality of outlet water, can realize reasonable energy consumption control, and is a green, energy-saving and environment-friendly high-salinity wastewater treatment mode.
The embodiment of the utility model provides a wastewater treatment system 100 has following technological effect at least: compared with the prior art, in the wastewater treatment system 100 provided by the embodiment of the utility model, high-salt wastewater is firstly introduced into the pre-oxidation unit 110, oxygen and ozone transmitted from the first oxidation gas path B can carry out primary oxidation treatment on the high-salt wastewater, so that primary removal of COD (chemical oxygen demand) and primary removal of chromaticity of the high-salt wastewater are realized; high salt waste water through preliminary oxidation treatment gets into in the electro-fenton body 121, oxygen and ozone that come from second oxidation gas circuit C conveying can make waste water when passing through electrode plate group 122, take place iron carbon micro-electrolysis reaction with iron carbon filler 123 simultaneously, take place oxidation reaction with ozone, take place anodic oxidation reaction at anode cell board, take place catalytic oxidation reaction with the hydrogen peroxide produced of negative pole and the iron ion that iron carbon filler 123 provided, realize the quadruple oxidation reaction, make the organic matter in the high salt waste water basically mineralize, COD clearance and colourity desorption rate have been improved greatly, can improve the treatment effeciency of waste water effectively.
Referring to fig. 1, as an embodiment, a water path pipe 140 forming a wastewater path a is disposed between the pre-oxidation unit 110 and the electro-fenton body 121, a first gas path pipe 150 forming a first oxidation path B is disposed between the electro-fenton body 121 and the pre-oxidation unit 110, and a second gas path pipe 160 forming a second oxidation path C is disposed between the ozone generation unit 130 and the electro-fenton body 121. In this embodiment, the water channel pipe 140, the first air channel pipe 150, and the second air channel pipe 160 may be bent according to the layout, and may be formed by splicing multiple sections, thereby ensuring the tightness of the water channel and the air channel.
Further, on-off control valves are disposed on the waterway duct 140, the first air duct 150, and the second air duct 160. In the embodiment, the flow speed and flow quantity of the wastewater can be controlled by adjusting the on-off state of the on-off control valve, and the introduction speed and introduction quantity of the oxygen and the ozone are controlled. For example, the on-off control valve may be a ball valve.
Further, the first air passage pipe 150 is provided at a position higher than the second air passage pipe 160 in the electro-fenton body 121. Generally, the wastewater may occupy a certain height when passing through the electro-fenton body 121, and the first gas path pipe 150 is disposed at a high position, so that oxygen and ozone can be separated from the wastewater and then pass through the pre-oxidation unit 110.
In order to uniformly introduce oxygen and ozone into the pre-oxidation unit 110, as a specific embodiment, the pre-oxidation unit 110 includes a pre-oxidation body having a wastewater inlet 112, and a first gas distribution member is provided in the pre-oxidation body and is communicated with the first gas passage pipe 150. In this embodiment, the preoxidation body is a cavity with a holding cavity, and can hold wastewater to be treated. The first gas distribution component can be provided with a cavity with uniform spray holes, so that oxygen and ozone can be uniformly introduced into the pre-oxidation body, different positions can be synchronously oxidized, and a more uniform treatment effect is obtained.
In order to uniformly introduce oxygen and ozone into the electro-fenton body 121, referring to fig. 1, as an embodiment, a second gas distribution member 124 is disposed in the electro-fenton body 121 and is communicated with a second gas channel 160, and the second gas distribution member 124 is disposed adjacent to the iron-carbon filler 123. In this embodiment, the second gas distribution member 124 may specifically have a cavity with uniform spraying holes, which enables oxygen and ozone to be uniformly introduced into the electro-fenton body 121. The second gas distribution member 124 covers the outline range of the iron-carbon filler 123, so that different positions can be synchronously oxidized, and a more uniform treatment effect is achieved.
The specific structure of the pre-oxidation unit 110 is not limited, and as a specific embodiment, the pre-oxidation unit 110 includes a pre-oxidation body having a wastewater inlet 112, and the ratio of the height to the diameter of the pre-oxidation body is 4:1 to 8: 1. In this embodiment, the preoxidation body is a cavity with a holding cavity, and can hold wastewater to be treated. The ratio of the height to the diameter of the pre-oxidation body can be 4:1, 5:1, 6:1, 7:1, 8:1 and the like, and the arrangement can ensure that the waste water in the pre-oxidation body has a larger treatment area and a certain primary oxidation treatment effect. The pre-oxidation body can be filled with filler, catalyst and the like to assist in finishing primary oxidation treatment.
Referring to fig. 1, as an embodiment, at least one sludge discharge hopper 125 is further disposed at the bottom of the electro-fenton body 121 for cleaning iron sludge generated from wastewater treatment. In this embodiment, during the wastewater treatment process, the ferrous ions and the ferric ions are likely to form flocculent precipitates with the hydroxide, and adsorb suspended or colloidal micro particles and organic polymers in the wastewater to form iron sludge, which can be settled in the sludge discharge hopper 125 to further reduce the chromaticity of the wastewater and remove part of organic pollutants to purify the wastewater.
Further, the electro-fenton body 121 is further provided with a manhole for cleaning the mud bucket 125. In this embodiment, the manhole is used for in time clearing out the iron mud in the mud bucket 125, guarantees the interior waste water treatment capacity of electro-fenton body 121, improves the continuation of handling.
As a specific embodiment, the electrode plate group 122 includes at least one set of cathodes and anodes alternately arranged in sequence, and the iron carbon filler 123 is filled between the cathodes and the anodes. Specifically, the multiple sets of cathodes and anodes which are sequentially and alternately arranged are generally adopted, the cathodes and the anodes can be graphene pole plates and carbon fiber pole plates, the two pole plates have high corrosion resistance and long service life, meanwhile, oxygen can generate hydrogen peroxide near the cathodes more easily, and the electro-Fenton efficiency can be improved. In addition, the reverse pole function of the cathode and the anode can prevent scaling and prolong the service life of the polar plate.
Two specific examples of wastewater treatment are provided below for illustration.
The first embodiment is as follows: the electro-Fenton body 121 is filled with iron-carbon fillers 123 with the volume of more than 2/3, the cathode is made of carbon fiber materials, and the anode is made of graphene materials. Coking wastewater is pumped into the system through the wastewater inlet 112 by the water pump, the coking wastewater inflow rate is controlled to enable the coking wastewater to stay in the electro-Fenton body 121 for 0.5h, the system is fully filled with wastewater, the electro-Fenton control power supply is started to control the current density to be 200A/m2, the ozone generating unit 130 is started to control the ozone concentration to be 10g/m3, after the system continuously runs for 2 hours, a water sample is collected from the wastewater outlet 126, the COD removal rate is detected to be more than 85%, and the effluent color is colorless and transparent.
The above-mentioned data is a condition of wastewater treatment system 100 that ozone type electro-Fenton catalytic oxidation formed when handling coking wastewater, and above-mentioned wastewater treatment system 100 area is little, and the power consumption is little (equal treatment effect), and the decoloration effect is obvious (colorless transparent), and the decoloration is all qualified no colour to bounce, easy operation and nimble adjustable, and the COD clearance is high.
Example two: the electro-Fenton body 121 is filled with iron-carbon fillers 123 with the volume of more than 2/3, the cathode is made of carbon fiber materials, and the anode is made of graphene materials. Pharmaceutical wastewater is pumped into the system through the wastewater inlet 112 through the water pump, the water inflow rate of the pharmaceutical wastewater is controlled to enable the pharmaceutical wastewater to stay in the electro-Fenton body 121 for 1.0h, the system is fully filled with water, the electro-Fenton control power supply is started to control the current density to be 150A/m2, the ozone generating unit 130 is started to control the ozone concentration to be 5g/m3, after the system is continuously operated for 2 hours, the removal rate of water samples collected from the wastewater outlet 126 is over 85%, and the color of outlet water is colorless and transparent.
The above-mentioned data is a condition of wastewater treatment system 100 that ozone type electro-Fenton catalytic oxidation formed when handling coking wastewater, and above-mentioned wastewater treatment system 100 area is little, and the power consumption is little (equal treatment effect), and the decoloration effect is obvious (colorless transparent), and the decoloration is all qualified no colour to bounce, easy operation and nimble adjustable, and the COD clearance is high.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A wastewater treatment system, comprising:
a pre-oxidation unit having a wastewater inlet;
the electro-Fenton unit comprises an electro-Fenton body communicated with the pre-oxidation unit and an electrode plate group arranged in the electro-Fenton body, wherein the electrode plate group is used for conducting electricity and filling iron-carbon filler, and the electro-Fenton body is provided with a wastewater outlet; and
the ozone generating unit is communicated with the electro-Fenton body;
the wastewater treatment system is formed from the wastewater inlet to the wastewater water path of the wastewater outlet, from the electro-Fenton body to the first oxidation gas path of the pre-oxidation unit, and from the ozone generation unit to the second oxidation gas path of the electro-Fenton body.
2. The wastewater treatment system according to claim 1, wherein a water passage pipe constituting the wastewater water passage is provided between the pre-oxidation unit and the electro-Fenton body, a first gas passage pipe constituting the first oxidation gas passage is provided between the electro-Fenton body and the pre-oxidation unit, and a second gas passage pipe constituting the second oxidation gas passage is provided between the ozone generation unit and the electro-Fenton body.
3. The wastewater treatment system according to claim 2, wherein the water passage pipe, the first gas passage pipe and the second gas passage pipe are provided with on-off control valves.
4. The wastewater treatment system according to claim 2, wherein the first gas passage is provided at a position higher than a position at which the second gas passage is provided in the electro-Fenton body.
5. The wastewater treatment system of claim 2, wherein the pre-oxidation unit comprises a pre-oxidation body having the wastewater inlet, and a first gas distribution member is provided in the pre-oxidation body in communication with the first gas passage pipe.
6. The wastewater treatment system of claim 2, wherein a second gas distribution member is disposed in the electro-Fenton body and is communicated with the second gas channel through pipe, and the second gas distribution member is disposed adjacent to the iron-carbon filler.
7. The wastewater treatment system of claim 1, wherein the pre-oxidation unit comprises a pre-oxidation body having the wastewater inlet, the pre-oxidation body having a ratio of height to diameter of 4:1 to 8: 1.
8. The wastewater treatment system of claim 1, wherein the bottom of the electro-Fenton body is further provided with at least one sludge discharge hopper.
9. The wastewater treatment system of claim 8, wherein the electro-Fenton body is further provided with a manhole for cleaning the mud bucket.
10. The wastewater treatment system according to claim 1, wherein the electrode plate groups comprise at least one group of cathodes and anodes alternately arranged in sequence, and the iron-carbon filler is filled between the cathodes and the anodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022406343.1U CN213569936U (en) | 2020-10-26 | 2020-10-26 | Wastewater treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022406343.1U CN213569936U (en) | 2020-10-26 | 2020-10-26 | Wastewater treatment system |
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| CN213569936U true CN213569936U (en) | 2021-06-29 |
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| CN202022406343.1U Active CN213569936U (en) | 2020-10-26 | 2020-10-26 | Wastewater treatment system |
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