Method for improving oxygen utilization rate of supercritical water oxidation system

An oxidation system and supercritical water technology, applied in the direction of oxidation water/sewage treatment, etc., can solve the problems of high oxygen cost and low utilization rate, and achieve the effects of improving economy, reducing the peroxygen coefficient, and improving oxygen utilization rate

Inactive Publication Date: 2010-09-15
SHANDONG UNIV
View PDF6 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A method for improving the utilization rate of oxygen in a supercritical water oxidation system. The invention aims at the problem of high cost and low utilization rate of oxygen in the operation of a supercritical water oxidation syst

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
  • Method for improving oxygen utilization rate of supercritical water oxidation system
  • Method for improving oxygen utilization rate of supercritical water oxidation system
  • Method for improving oxygen utilization rate of supercritical water oxidation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and a specific embodiment given by the inventor.

[0023] The organic waste liquid with a concentration of 8wt% in the waste liquid storage tank 2 is boosted to 25 MPa by the waste liquid booster pump 5, and heated to 400° C. injection. The oxygen in the oxygen tank 1 is pressurized to 25 MPa by the oxygen booster pump 4, and is directly injected from the oxygen inlet 17 on the upper part of the evaporating wall reactor 10 without preheating with an oxygen demand twice that of the complete oxidation of organic matter. In the upper part of the evaporation wall reactor 10, oxygen and organic matter are mixed and undergo supercritical water oxidation reaction. The evaporated water in the pure water storage tank 3 is boosted to 25.1 MPa by the evaporated water increasing pump 6 at a flow rate three times the sum of the mass flow rate of the organic waste liquid and oxygen, a...

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 relates to a method for improving oxygen utilization rate of a supercritical water oxidation system. The method comprises the following steps of: injecting excessive oxygen and preheated organic waste liquid from the upper part of an evaporation wall reactor, mixing the oxygen and the organic waste liquid, performing supercritical water oxidation reaction on the mixture, and injecting evaporation water from the lateral surface of the evaporation wall reactor so as to form a supercritical temperature reaction area on the upper part and a sub-critical temperature salt dissolution area on the lower part in the reactor. When the reacted rest oxygen downwards flows to the sub-critical temperature salt dissolution area from the supercritical temperature reaction area, a part of oxygen is separated out and circulated to the supercritical temperature area on the upper part of the reactor to form internal circulation utilization of the oxygen; and the reacted fluid enters a high-pressure gas-liquid separator through condensation and pressure reduction, is dissolved into sub-critical water and carries the oxygen flowing out of the reactor, is separated by the high-pressure gas-liquid separator and then is re-injected to the reactor to form external circulation utilization. The method remarkably reduces the excessive oxygen amount coefficient by improving the utilization rate of the oxygen, and improves the running economy of the supercritical water oxidation system.

Description

1. Technical field [0001] The invention belongs to the field of organic waste treatment, in particular to a method for improving the oxygen utilization rate of a supercritical water oxidation system. 2. Background technology [0002] Supercritical Water Oxidation (Supercritical Water Oxidation) technology is a new type of treatment of organic waste and recovery of energy and pure CO 2 Technology. This technology is a method of "burning" and oxidizing organic matter with oxygen or other oxidants under high temperature and high pressure conditions exceeding the critical point of water (T=374°C, P=22.1MPa). Supercritical water has a liquid-like density, solubility and good fluidity. It is a non-polar solvent, and it also has a gas-like diffusion coefficient and low viscosity. In supercritical water, the gas-liquid two-phase interface disappears, organic matter and O 2 It is completely soluble in supercritical water to form a homogeneous phase system, and the reaction speed i...

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
Inventor 马春元张凤鸣陈守燕陈桂芳张家明
Owner SHANDONG UNIV
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