Electrochemical oxidation treatment device and method of low-salt wastewater through micro-fluid reactor

A technology of microfluidic reactor and oxidation treatment, applied in chemical instruments and methods, sterilization/microdynamic water/sewage treatment, water/sewage treatment, etc., can solve the problems of increasing investment cost, secondary pollution, etc., and achieve improvement Efficiency, prolonging life, and reducing the effect of plate spacing

Inactive Publication Date: 2018-11-13
SHAANXI UNIV OF SCI & TECH
View PDF4 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under normal circumstances, electrochemical wastewater treatment technology needs to be applied when the wastewater contains electrolytes such as sodium chloride or sodium sulfate. Under the action of an external power supply, the current passes through the electrolyte solution, and a redox reaction occurs on the surface of the cathode and anode; the higher the electrolyte content, the That is, the higher the conductivity, the smaller the resistance during the electrolysis reaction, and the easier the electrolysis reaction is. In the prior art, electrolytes such as NaCl/Na are often added t...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electrochemical oxidation treatment device and method of low-salt wastewater through micro-fluid reactor
  • Electrochemical oxidation treatment device and method of low-salt wastewater through micro-fluid reactor
  • Electrochemical oxidation treatment device and method of low-salt wastewater through micro-fluid reactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1, a certain degreasing agent production enterprise waste water treatment:

[0047] The effluent from the secondary sedimentation tank of the degreasing agent manufacturer was treated with microfluidic electrochemical oxidation. The initial total organic carbon content of the wastewater was 210±15mg / L, and the conductivity was 1.42ms / cm. In step 1, direct electrochemical oxidation was selected as the electrolytic process. The boron diamond electrode is used as the anode, the nickel is used as the cathode, and the area of ​​the reaction hole 6 is 3.75cm 2 , that is, the plate reaction area is 3.75cm 2 , the thickness of the isolation film layer 5 is 50 μm, that is, the distance between the plates is 50 μm, the current intensity is 20mA, 60mA, 100mA and 200mA, and the corresponding current density is 5.3~53mA / cm 2 , the organic matter removal effect is as figure 2 As shown, the power consumption required for the reaction varies with the injection flow rate a...

Embodiment 2

[0049] Embodiment 2, a certain chemical enterprise wastewater treatment:

[0050] The chemical company is mainly engaged in the development and production of surfactants, pharmaceutical excipients, and synthetic lubricating oil. The initial total organic carbon content of wastewater is 4500±150mg / L, and the conductivity is 5.42ms / cm. The electrolysis process adopts direct electrochemical oxidation and electro-fen The anode material is a boron-doped diamond electrode, the cathode material is a graphite electrode, and the reaction area of ​​the plate is 3.75cm 2 , the distance between the plates is 50μm, and about 0.5mmol / L of Fe is added to the wastewater 2+ , the current intensity is 20mA, 60mA, 100mA and 200mA respectively, corresponding to the current density of 5.3 ~ 53mA / cm 2 , the organic matter removal effect and the power consumption required for the reaction are shown in Figure 4 and Figure 5 .

[0051] Depend on Figure 4 It can be seen that by adjusting the cu...

Embodiment 3

[0052] Example 3, Wastewater Treatment of a Food Processing Enterprise

[0053] After testing the waste water of the food processing enterprise, the initial total organic carbon content was 120±5mg / l, the main component was maleic acid, and the conductivity was about 3.8ms / cm. The indirect electrochemical oxidation process was selected according to the effective components in the waste water. Anode material DSA, cathode nickel, plate spacing 75μm, reaction area 3.75cm 2 . Current intensity 10mA~100mA (current density 2.7mA / cm 2 -27mA / cm 2 ), the injection flow rates were 0.5mL / min, 0.3mL / min, and 0.1mL / min, respectively. Under the conditions of injection flow rate of 0.3mL / min, current intensity of 100mA, injection flow rate of 0.1mL / min, and current intensity of 50 and 100mA, the removal efficiency of organic matter can reach more than 80%, and the energy consumption per unit mass of organic carbon is 0.24±0.06kW h / gTOC, such as Figure 6 and Figure 7 shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Conductivityaaaaaaaaaa
Conductivityaaaaaaaaaa
Login to view more

Abstract

The invention discloses an electrochemical oxidation treatment device of a low-salt wastewater through micro-fluid reactor. An anode plate, an insulated membrane layer and a cathode plate are arrangedin the fluid direction; insulated pad layers are arranged on the outer sides of the anode plate and the cathode plate; shells are arranged on the outer sides of the insulated pad layers. The invention also discloses an electrochemical oxidation treatment method. An insulated membrane layer is only arranged between the anode plate and the cathode plate, so that a space of polar plates is greatly reduced, and the efficiency of an electrochemical reaction process is effectively improved; when a reaction device is used alone, a high action effect is achieved; according to different electrochemical oxidation processes, materials of the polar plates can be replaced; when the different polar plate materials are connected in series and the different electrochemical processes and electrochemical parameters are adopted, wastewater containing different types of pollutant substances are treated, so that the current density is increased to the maximum limit and the electrolysis time is shortened;electrochemical oxidation reaction on organic pollutants in the wastewater is directly carried out, so that secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to an electrochemical oxidation treatment device and method for low-salt wastewater by a microfluidic reactor. Background technique [0002] As the problem of water pollution becomes more and more serious, the legislative requirements for wastewater discharge in various countries are becoming increasingly strict. The technology of using electrochemical catalytic oxidation to treat refractory biodegradable organic pollutants has attracted widespread attention of researchers. Compared with other types of wastewater treatment technologies, the main advantages of electrochemical methods are mild reaction conditions, flexible operation, easy automation, strong selectivity, and no secondary pollution. In recent years, many researchers have begun to apply electrochemical wastewater treatment technology to high-salt / conductivity practical wastewater treatment projects such as...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C02F1/467C02F1/469C02F101/30
CPCC02F1/4672C02F1/469C02F2101/30
Inventor 马宏瑞马鹏飞
Owner SHAANXI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap