CN215798940U

CN215798940U - electro-Fenton reaction effluent treatment plant

Info

Publication number: CN215798940U
Application number: CN202121456620.8U
Authority: CN
Inventors: 余聪; 雷静; 单梅; 周梦; 陈慧; 蒋毅
Original assignee: Wuhan New Yuking Environmental Protection Technology Co ltd
Current assignee: Wuhan New Yuking Environmental Protection Technology Co ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-02-11
Anticipated expiration: 2031-06-29

Abstract

The utility model provides an electro-Fenton reaction wastewater treatment device, which comprises an electro-Fenton reaction tank, an intermediate water tank, a neutralization coagulation tank, a sedimentation tank, a blower, an aeration device, a first direct-current power supply and a second direct-current power supply, wherein the intermediate water tank is arranged in the middle of the electro-Fenton reaction tank; the aeration device is arranged at the bottom of the electro-Fenton reaction tank, and the blower is connected with the aeration device; the intermediate water tank is connected with the electro-Fenton reaction tank through a pipeline, the electro-Fenton reaction tank is connected with the neutralization coagulation tank through a pipeline, and the neutralization coagulation tank is connected with the sedimentation tank through a pipeline; a first anode plate and a cathode plate are sequentially arranged in the electro-Fenton reaction tank from bottom to topAnd the anode and the cathode of the first direct current power supply are electrically connected with the first anode plate and the cathode plate respectively, and the anode and the cathode of the second direct current power supply are electrically connected with the second anode plate and the cathode plate respectively. The wastewater treatment device of the utility model does not need to add a medicament and continuously generates Fe²⁺And H₂O₂Can ensure the continuous and effective degradation of organic pollutants. The treatment process is clean, the sludge amount is small, the post-treatment is simple, and no secondary pollution is caused.

Description

electro-Fenton reaction effluent treatment plant

Technical Field

The utility model belongs to the technical field of electrochemical wastewater treatment, and particularly relates to an electro-Fenton reaction wastewater treatment device.

Background

High-concentration degradation-resistant organic wastewater is a difficult problem of water treatment technology. The wastewater is mainly generated in the production processes of dye, pesticide, medicine, chemical industry, coking and the like, and the wastewater has high pollutant concentration, high toxicity and high salt content and is difficult to biodegrade, so that the wastewater can be effectively and properly treated only by adopting a pretreatment technology and a pretreatment method. If the substances are discharged to the environment without treatment, the environment is seriously polluted and the human health is threatened. With the rapid development of industry and agriculture, people synthesize more and more organic matters, wherein the refractory organic matters account for a large proportion, so that the treatment research on the refractory organic matters has attracted high attention of relevant experts at home and abroad, and is a hotspot and difficulty of the current water pollution prevention and treatment research.

The advanced oxidation technology has very obvious advantages in the field of treating organic wastewater difficult to degrade. The fenton reaction is a typical advanced oxidation process: the hydroxyl free radical is generated by the reaction of the hydrogen peroxide and the ferrous ions, and the organic matters which are difficult to degrade and can not be removed by the traditional technology can be rapidly removed. The research and application of Fenton (Fenton) reagent in wastewater treatment are receiving increasing attention at home and abroad. The advantage of the Fenton's reagent oxidation process is that H₂O₂High decomposition speed and high oxidation rate, but because of a large amount of Fe²⁺Presence of H₂O₂The utilization rate of (A) is not high, the organic pollutants are not completely degraded, and the reaction is necessaryUnder acidic condition, otherwise, Fe (OH) is precipitated₃Precipitating the added Fe²⁺Or Fe³⁺The method has the defects that the neutralization of the solution consumes a large amount of acid and alkali, and the treatment cost is high, so that the wide application of the method is limited. In view of this, the improvement of this method is being sought by environmental scientists, and the fenton method is essentially developed along both photochemical and electrochemical routes.

The electro-Fenton method is produced by an electrochemical method and is used as a continuous source of a Fenton reagent, and the electro-Fenton method and the Fenton reagent are immediately acted after being produced to generate hydroxyl radicals with high activity so as to degrade organic matters, wherein the essence is that the Fenton reagent is directly generated in the electrolytic process. Compared with the traditional Fenton method, the electro-Fenton method has the unique advantages that a small amount of chemical agents are not needed or only needed; the treatment cost can be greatly reduced; the treatment process is clean, and secondary pollution to water quality is avoided; the equipment is relatively simple, and the parameters to be controlled in the electrolysis process are only current and voltage, so that the automatic control is easy to realize. The electro-Fenton method has the concomitant purification effects of anodic oxidation, electro-adsorption and the like besides the oxidation effect of hydroxyl radicals, so that the treatment efficiency is higher than that of the traditional Fenton method, the occupied area is small, the treatment period is short, the condition requirement is not strict, the electro-Fenton method is easy to combine with other methods, and an effective way is provided for the comprehensive treatment of the wastewater.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a method for continuously and efficiently producing Fe by an electrochemical method without adding a medicament²⁺And H₂O₂The electro-Fenton reaction wastewater treatment device.

In order to achieve the purpose, the utility model adopts the following technical scheme:

an electro-Fenton reaction wastewater treatment device comprises an electro-Fenton reaction tank, an intermediate water tank, a neutralization coagulation tank, a sedimentation tank, an air blower, an aeration device, a first direct current power supply and a second direct current power supply;

the aeration device is arranged at the bottom of the electro-Fenton reaction tank, and the blower is connected with the aeration device;

the intermediate water tank is connected with the electro-Fenton reaction tank through a pipeline, the electro-Fenton reaction tank is connected with the neutralization coagulation tank through a pipeline, and the neutralization coagulation tank is connected with the sedimentation tank through a pipeline;

from the bottom up is equipped with first anode plate, negative plate and second anode plate in proper order in the electro-Fenton reaction tank, first DC power supply's positive pole and negative pole respectively in first anode plate and negative plate electricity are connected, second DC power supply's positive pole and negative pole respectively in second anode plate and negative plate electricity are connected.

Still further, the first anode plate and the cathode plate are vertically arranged, and the second anode plate is horizontally arranged.

Furthermore, the first anode plate is a titanium plate or a titanium iridium alloy plate, the cathode plate is a graphite plate, and the second anode plate is a stainless steel plate containing iron elements.

Further, the surface of the first anode plate is coated with a Sn-Sb-Ir-Ta composite oxide catalyst.

Furthermore, the first anode plate, the cathode plate and the second anode plate are all porous structures, the aperture ratio is 20-40%, and the aperture is 6 mm.

Furthermore, the first direct current power supply and the second direct current power supply are adjustable voltage type direct current power supplies and are respectively connected with an ammeter for monitoring the working current.

Furthermore, a water distribution device is arranged at the bottom of the electro-Fenton reaction tank and is connected with the middle water tank.

The utility model has the beneficial effects that:

1. the cost of the chemical agent is greatly reduced, and the treatment cost can be greatly reduced.

2、Fe²⁺And H₂O₂The generation is continuous at a considerable rate, and hydroxyl free radicals (. OH) are continuously generated in the treatment process, so that the organic pollutants can be continuously and effectively degraded for a long time.

3. The system has more synergistic oxidation effects, and besides the Fenton oxidation effect, the direct electrocatalytic oxidation and the electricity of the first anode plateAdsorption, Fe (OH)₃Flocculation, etc., and high treatment efficiency.

4. The treatment process is clean, the sludge amount is small, the post-treatment is simple, and no secondary pollution is caused.

5. The equipment is relatively simple, and the parameters to be controlled in the electrolysis process are only current and voltage, so that the automatic control is easy to realize.

Drawings

FIG. 1 is a schematic view of a wastewater treatment apparatus according to the present invention;

wherein: 1. an electro-Fenton reaction tank; 2. a middle water tank; 3. A neutralization coagulation tank; 4. a sedimentation tank; 5. a blower; 6. an aeration device; 7. a first direct current power supply; 8. a second DC power supply.

Detailed Description

To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific embodiments. This invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the utility model to those skilled in the art, and the present invention will only be defined by the appended claims.

The utility model provides an electro-Fenton reaction effluent treatment plant, includes electro-Fenton reaction tank 1, middle pond 2, neutralization coagulation pond 3, sedimentation tank 4, air-blower 5, aeration equipment 6, first DC power supply 7 and second DC power supply 8.

The aeration device 6 is arranged at the bottom of the electro-Fenton reaction tank 1, and the blower 5 is connected with the aeration device 6; middle pond 2 is connected with electro-Fenton reaction tank 1 through the pipeline, and electro-Fenton reaction tank 1 is connected with neutralization coagulation pond 3 through the pipeline, and neutralization coagulation pond 3 is connected with sedimentation tank 4 through the pipeline. The middle water tank 2 is a water inlet amount adjusting and buffering area of the device, the neutralization coagulation tank 3 is a water outlet adjusting area of the device, the neutralization coagulation is carried out in the neutralization coagulation tank 3 to precipitate iron salt so as to remove suspended matters and non-soluble COD in the outlet water, and the sedimentation tank 4 is a device for carrying out mud-water separation on the iron salt and the suspended matters after coagulation.

electro-Fenton reaction tankThe first anode plate, the cathode plate and the second anode plate are sequentially arranged in the first direct current power supply 1 from bottom to top, the anode and the cathode of the first direct current power supply 7 are electrically connected with the first anode plate and the cathode plate respectively, and the anode and the cathode of the second direct current power supply 8 are electrically connected with the second anode plate and the cathode plate respectively. The first direct current power supply 7 is used for generating H₂O₂And a second DC power supply 8 for generating Fe² ⁺。

Further, the first anode plate and the cathode plate are vertically arranged, and the second anode plate is horizontally arranged. The use efficiency and the treatment efficiency of the Fenton reagent are improved through the difference of the space positions of the polar plates.

Furthermore, the first anode plate is a titanium plate or a titanium iridium alloy plate, and the surface of the first anode plate is coated with the Sn-Sb-Ir-Ta composite oxide catalyst. The organic pollutants can be degraded by direct oxidation reaction on the first anode plate, and electrocatalytic oxidation synergistic reaction is generated in the system.

The negative plate is a graphite plate, a large number of oxygen molecules are adsorbed on the surface of the negative plate and receive electrons provided by an external circuit to enable O to be generated₂The molecules are electrochemically reduced to form H₂O₂。

The second anode plate is a stainless steel plate containing iron element, and Fe generated by the second anode plate is under the action of an electric field²⁺。

Furthermore, the first anode plate, the cathode plate and the second anode plate are all porous structures, the aperture ratio is 20-40%, and the aperture is 6 mm. The design makes organic pollutants more easily contact with the surface of the electrode, thereby improving the reaction probability and the water treatment effect.

Furthermore, the first dc power supply 7 and the second dc power supply 8 are adjustable voltage dc power supplies, and are respectively connected to an ammeter for monitoring the operating current. H meeting the water treatment requirement can be obtained in the solution by adjusting the current₂O₂And H₂O₂With Fe²⁺The solubility ratio of (a).

Furthermore, the bottom of the electro-Fenton reaction tank 1 is also provided with a water distribution device, the water distribution device is connected with the middle water tank 2, and a water inlet pump is arranged on a pipeline between the water distribution device and the middle water tank 2. The water distribution device enables organic wastewater entering the electro-Fenton reaction tank 1 to be more dispersed, and the contact area between the organic wastewater and the electrode is increased, so that the water treatment efficiency is improved.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. An electro-Fenton reaction wastewater treatment device, characterized in that it comprises an electro-Fenton reaction tank (1), an intermediate water tank (2), a neutralization coagulation tank (3), a sedimentation tank (4), a blower (5) ), an aeration device (6), a first DC power supply (7) and a second DC power supply (8);

The aeration device (6) is arranged at the bottom of the electro-Fenton reaction tank (1), and the blower (5) is connected to the aeration device (6);

The intermediate water tank (2) is connected to the electro-Fenton reaction tank (1) through a pipeline, and the electro-Fenton reaction tank (1) is connected to the neutralization and coagulation tank (3) through a pipeline, so the The neutralization and coagulation tank (3) is connected with the sedimentation tank (4) through a pipeline;

The electro-Fenton reaction cell (1) is provided with a first anode plate, a cathode plate and a second anode plate in sequence from bottom to top, and the positive and negative electrodes of the first DC power supply (7) are respectively connected to the An anode plate and a cathode plate are electrically connected, and the positive electrode and the negative electrode of the second DC power supply (8) are electrically connected to the second anode plate and the cathode plate, respectively.

2 . The electro-Fenton reaction wastewater treatment device according to claim 1 , wherein the first anode plate and the cathode plate are arranged vertically, and the second anode plate is arranged horizontally. 3 .

3. The electro-Fenton reaction wastewater treatment device according to claim 1, wherein the first anode plate is a titanium plate or a titanium-iridium alloy plate, the cathode plate is a graphite plate, and the second anode plate is a titanium plate or a titanium-iridium alloy plate. The plate is a stainless steel plate containing iron elements.

4 . The electro-Fenton reaction wastewater treatment device according to claim 3 , wherein the surface of the first anode plate is coated with a Sn-Sb-Ir-Ta composite oxide catalyst. 5 .

5. A kind of electro-Fenton reaction wastewater treatment device according to claim 1, is characterized in that: described first anode plate, cathode plate and second anode plate are porous structure, open porosity 20-40%, aperture 6mm.

6 . The electro-Fenton reaction wastewater treatment device according to claim 1 , wherein the first DC power source ( 7 ) and the second DC power source ( 8 ) are adjustable voltage DC power sources, which are respectively connected to An ammeter is used to monitor the operating current.

7. The electro-Fenton reaction wastewater treatment device according to claim 1, characterized in that: the electro-Fenton reaction pool (1) is further provided with a water distribution device at the bottom, and the water distribution device is connected to the intermediate pool (2). )connect.