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

Technology of treating high-concentration organic wastewater with wet type catalytic oxidation

A technology for catalytic wet oxidation of organic wastewater, applied in the direction of oxidation water/sewage treatment, water/sewage treatment, water/sludge/sewage treatment, etc., to reduce process energy consumption and improve wastewater treatment efficiency

Inactive Publication Date: 2019-03-12
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching, no reports of prior art were found

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
  • Technology of treating high-concentration organic wastewater with wet type catalytic oxidation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The catalyst (Pd-Ag-Zn / TiO 2 , where Pd accounts for 0.44wt%, Ag accounts for 1.5wt%, Zn accounts for 0.35wt%, TiO 2 Accounting for 97.71wt%) 4ml was filled in the fixed bed reactor. The COD content of the wastewater is 10000mg / L, and the space velocity is 0.5h -1 , given that the space velocity of oxygen-enriched gas is 34 times the space velocity of wastewater (16.8h -1 ), the oxygen concentration is 1.2 times of the theoretical oxygen demand, and the oxygen generator automatically adjusts the oxygen concentration to 25%. The waste water is mixed with oxygen-enriched gas and enters the heat exchanger. After heat exchange, the gas-liquid mixture is sent to the waste water reactor for reaction at 250°C and 6.0 MPa; the water vapor after the oxidation reaction first passes through the heat exchanger and then water-cooled The temperature of the device is cooled, and then sent to the gas-liquid separation tank for gas-liquid separation, the treated water is directly dis...

Embodiment 2

[0021]The catalyst of Example 5 in CN201810389974.1 (Ru-Ag-La / molecular sieve, wherein Ru accounts for 0.3wt%, Ag accounts for 0.9wt%, La accounts for 0.05wt%, molecular sieve accounts for 98.75wt%) 4ml is packed in fixed bed reaction inside the device. The COD content of the wastewater is 30000mg / L, and the space velocity is 1h -1 , given that the space velocity of oxygen-enriched gas is 35 times the space velocity of wastewater (35h -1 ), the oxygen concentration is 1.15 times of the theoretical oxygen demand, and the oxygen generating device automatically adjusts the oxygen concentration to 69%. The waste water is mixed with oxygen-enriched gas and enters the heat exchanger. After heat exchange, the gas-liquid mixture is sent to the waste water reactor for reaction at 200°C and 5.0 MPa; the water vapor after the oxidation reaction first passes through the heat exchanger and then water-cooled After cooling down, it is sent to the gas-liquid separation tank for gas-liquid s...

Embodiment 3

[0023] The catalyst (Au-Ag-Mo / ZrO 2 , where Au accounts for 0.4wt%, Ag accounts for 1.2wt%, Mo accounts for 0.5wt%, ZrO 2 Accounting for 97.9wt%) 4ml was filled in the fixed bed reactor. The COD content of the wastewater is 20000mg / L, and the space velocity is 1.5h -1 , given that the space velocity of oxygen-enriched gas is 36 times the space velocity of wastewater (54h -1 ), the oxygen concentration is 1.2 times of the theoretical oxygen demand, and the oxygen generating device automatically adjusts the oxygen concentration to 47%. The waste water is mixed with oxygen-enriched gas and enters the heat exchanger. After heat exchange, the gas-liquid mixture is sent to the waste water reactor for reaction at 210°C and 4.0 MPa; the water vapor after the oxidation reaction first passes through the heat exchanger and then water-cooled After cooling down, it is sent to the gas-liquid separation tank for gas-liquid separation; the treated water is sent to the next treatment sectio...

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 discloses a technology of treating high-concentration organic wastewater with wet type catalytic oxidation. The technology comprises the following steps that the technology adopts COD concentration online detection and is automatically correlated to an oxygen concentration regulation device, organic wastewater with the COD content being 10000-50000 mg / L and the liquid space velocityof the wastewater being 0.5-2.5 h<-1> is mixed with enriched oxygen, the device automatically regulates the oxygen volume concentration to be 25-99 percent, water which is sent into a wastewater reactor charged with a catalyst for treatment is directly discharged or sent to a next treatment work section, and tail gas containing nitrogen, oxygen, carbon dioxide and water vapor is directly exhaustedto atmosphere, wherein the space velocity of the enriched oxygen is 34-39 times the liquid space velocity of the wastewater, and the oxygen supply quantity is 1.1-1.2 times the theoretical oxygen demand. The technology disclosed by the invention has the advantages that high-concentration COD in acid or alkaline organic wastewater can be effectively removed.

Description

technical field [0001] The invention relates to a process for catalytic wet oxidation treatment of high-concentration organic wastewater, in particular to a process for catalytic wet oxidation treatment of organic wastewater containing high concentrations of COD and ammonia nitrogen. Background technique [0002] High-concentration organic wastewater mainly comes from the production processes of coal chemical industry, pharmaceuticals, papermaking, printing and dyeing, etc. Its remarkable characteristics are "four highs", that is, high COD (oil, phenols, polycyclic aromatic hydrocarbons), high ammonia nitrogen, and high chroma , high inorganic pollutants (sulfide, cyanide, salt), etc. High-concentration organic wastewater contains a large amount of biodegradable substances and toxic substances, which will seriously impact and poison microorganisms, resulting in the loss of activation ability of microorganisms. Improper treatment of high-concentration organic wastewater has ...

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): C02F1/72
CPCC02F1/725C02F1/727
Inventor 李德宝肖勇侯博鲁怀乾贾丽涛
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com