Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fenton's reagent oxidation wastewater treatment method and device thereof

A technology for oxidizing wastewater and treatment methods, which is applied in the direction of oxidized water/sewage treatment, special compound water treatment, water treatment parameter control, etc. It can solve the problems of high operational difficulty, difficulty, and reduced treatment effect, and reduce the difficulty of manual operation. , reduce processing costs, and stabilize the processing effect

Inactive Publication Date: 2017-12-15
CHINA PETROLEUM & CHEM CORP
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The pH control of the oxidized influent is not accurate enough
Controlling the pH of wastewater at an appropriate value is the most important condition for the oxidation of wastewater by the Fenton reagent process. However, some wastewater contains a high carbonate alkalinity, which acts as a buffer for pH adjustment, resulting It is difficult to adjust the pH of the wastewater to an appropriate value; and because the alkalinity of the wastewater generated by the production unit sometimes changes greatly, the constant acid addition will cause the pH of the oxidation influent to fluctuate, which will affect the Fenton Reagent oxidation treatment effect
For wastewater with the same alkalinity, there will be a "mutation point" where the pH value suddenly drops after adding acid. This is because the alkalinity in the water is completely neutralized by acid and cannot act as a "buffer". Continue to use concentrated acid It will be more difficult to adjust the pH value
Therefore, it is difficult to adjust the pH value accurately in the actual industrial application of the Fenton oxidation process, resulting in a decline in the treatment effect.
[0006] 2. The dosage control of oxidant is not precise enough
The method of adding a constant amount of oxidant in the existing device will not only lead to unstable COD of the effluent, but also sometimes excessive dosing, resulting in waste of medicament, and will also affect the detection of COD of the effluent (the remaining hydrogen peroxide in the effluent will affect the detection of COD. detection has an impact)
[0007] 3. The process is complex and the operation is difficult and intensive
[0011] Compared with the present invention, this related patent does not accurately control the pH of the reaction according to the type of wastewater to be treated, and the reaction effect is poor; this related patent makes the oxidation reaction complete by adding oxidants and catalysts in batches, but does not Consider adding oxidants and catalysts through the total amount of organic matter in wastewater. If the quality and quantity of wastewater vary greatly, the treatment effect will be unstable.

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
  • Fenton's reagent oxidation wastewater treatment method and device thereof
  • Fenton's reagent oxidation wastewater treatment method and device thereof
  • Fenton's reagent oxidation wastewater treatment method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Concentrated water produced by the reverse osmosis unit in the sewage reuse workshop of an oil refinery: water volume 80-110m 3 / h, COD is 80-180mg / L, pH is 7.0-8.9. The treatment method and device provided by the present invention are used to treat it: the waste water enters the first section of pH adjustment tank, and the first acid pump extracts 98% sulfuric acid from the concentrated acid storage tank to roughly adjust the pH of the waste water, and the effluent enters the second section of pH Adjusting tank, the second acid pump pumps 30% dilute sulfuric acid from the dilute acid storage tank to fine-tune the pH of the wastewater. Add 27.5% hydrogen peroxide and 20% ferrous sulfate to the ferrous sulfate storage tank. After 3 hours of oxidation, the effluent is extracted from the liquid caustic storage tank by the alkali pump to adjust the pH by 30%, and finally enters the sedimentation tank for solidification. Discharge after liquid separation.

[0032] See Tabl...

Embodiment 2

[0039] The wastewater produced by the styrene-butadiene plant of a rubber factory has undergone biochemical treatment and the water quality: the water volume is 220-300m 3 / h, COD is 76-150mg / L, pH is 6.9-8.5. The treatment method and device provided by the present invention are used for treatment: the waste water enters the first-stage pH adjustment tank, and the first acid pump pumps 98% sulfuric acid from the concentrated acid storage tank to adjust the pH of the waste water to 5.0, and the effluent enters the second-stage pH adjustment The second acid pump pumps 30% dilute sulfuric acid from the dilute acid storage tank to fine-tune the pH of the wastewater to 3.2. After the effluent enters the oxidation reaction pool, the first and second dosing pumps respectively collect the Add 27.5% hydrogen peroxide and 20% ferrous sulfate to the storage tank and the ferrous sulfate storage tank. After 3 hours of oxidation, the effluent will be pumped out 30% of the liquid caustic sod...

Embodiment 3

[0047] Wastewater from a printing and dyeing factory: water volume 50-75m3 / h, COD 5000-8000mg / L, pH 10-10.9. The treatment method and device provided by the present invention are used to treat it: the waste water enters the first section of pH adjustment tank, and the first acid pump extracts 98% sulfuric acid from the concentrated acid storage tank to roughly adjust the pH of the waste water, and the effluent enters the second section of pH Adjusting tank, the second acid pump pumps 30% dilute sulfuric acid from the dilute acid storage tank to fine-tune the pH of the wastewater. Add 27.5% hydrogen peroxide and 20% ferrous sulfate to the ferrous sulfate storage tank. After 3 hours of oxidation, the effluent is extracted from the liquid caustic storage tank by the alkali pump to adjust the pH by 30%, and finally enters the sedimentation tank for solidification. Discharge after liquid separation.

[0048] See Table 5 for the process parameter setting and monitoring results of t...

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

No PUM Login to View More

Abstract

The invention belongs to the field of wastewater treatment technology and specifically relates to a Fenton's reagent oxidation wastewater treatment method and a device thereof. Wastewater to be treated enters a 1-stage pH regulating tank, and concentrated acid is extracted from a concentrated acid storage tank through an acid adding pump to carry out first-step pH regulation; an effluent from the 1-stage pH regulating tank enters a 2-stage pH regulating tank, and diluted acid is extracted from a diluted acid storage tank through an acid adding pump to carry out second-step pH regulation; an effluent from the 2-stage pH regulating tank enters an oxidation reaction tank, hydrogen peroxide and ferrous sulfate are added into an inlet of the oxidation reaction tank through a dosing pump, and a reaction is conducted after mechanical agitation or air agitation and mixing of the materials and wastewater; after pH regulation of an effluent from the oxidation reaction tank is achieved by addition of alkali, the effluent enters a sedimentation tank, and the effluent from the oxidation tank undergoes solid-liquid separation in the sedimentation tank and finally discharging is followed. Dosage of the oxidizer is controlled precisely so as to avoid less or excessive dosage of the drug. It is ensured that the treatment effect is stable, and treatment cost is effectively reduced. Degree of automation is high, and manual operation difficulty is reduced.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a method and a device for treating wastewater oxidized by Fenton's reagent. Background technique [0002] With the improvement of human living standards and the rapid development of industrial production, more and more urban wastewater and industrial wastewater are produced correspondingly. Among them, most of the biodegradable wastewater is currently treated by biological methods. Wastewater containing refractory organic matter and toxic and harmful substances, such as wastewater from industries such as medicine, petrochemical, printing and dyeing, and papermaking, has large discharge, wide pollution, and poor biodegradability. The characteristics make it difficult for conventional physical, chemical and biological methods to meet the technical and economic requirements of purification treatment, which has become a difficult problem in the field of water...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/66
CPCC02F1/66C02F1/72C02F2209/07C02F2209/08C02F2209/40C02F2305/026
Inventor 邹宗海潘咸峰李波刘婷婷
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products