Supercritical water treatment and resource utilization system for waste organic matter

Abstract

The invention belongs to the field of environmental protection, relating to a technology for carrying out harmless treatment and resource utilization on waste organic liquid such as organic waste water / municipal sludge, and the like which has high concentration and is difficult for biochemical degradation, taking supercritical water as a reaction medium. The invention also discloses a supercritical water treatment and resource utilization system for waste organic matters. The system has the versatility, can flexibly select an optimal supercritical water treatment method in SCWO, SCWPO and SCWG according to the characteristics of different materials, integrates pretreatment, mixing, reaction, as well as product separation and collection of the materials, integrates COD emission reduction, desalination, slag removal and hydrogen production, and integrates the harmless treatment and the resource utilization of the waste organic matters.

Description

Technical field [0001] The invention belongs to the field of environmental protection, and relates to the use of supercritical water as a reaction medium for the harmless treatment and resource utilization of high-concentration organic waste water / urban sludge and other waste organic liquids that are difficult to biodegrade. Critical water treatment and resource utilization system. Background technique [0002] Supercritical water (SCW for short) refers to water in a special state whose temperature and pressure are both higher than its critical point (T=374.15°C, P=22.12MPa). Supercritical water has the properties of both liquid and gaseous water. In this state, only a small amount of hydrogen bonds exist, the dielectric constant is similar to that of organic solvents, and it has a high diffusion coefficient and low viscosity. Under sufficiently high pressure, organic matter and oxygen can be mutually dissolved in SCW in any proportion, so that the heterogeneous reaction becomes ...

AI Technical Summary

Problems solved by technology

[0005] 1) The ultimate goals of the three technologies (SCWO, SCWPO and SCWG) included in the supercritical water treatment technology are not the same, but they have similar supercritical water reaction environments; currently there is no supercritical water treatment system that combines the above three technologies. Critical water treatment system, resulting in single function and poor adaptability of supercritical water treatment system

[0006] 2) The existing supercritical water treatment system controls the salt content of materials strictly, which seriously affects the wide range of supercritical water treatment objects

The solubility of the salt contained in the material and the salt produced by the reaction in supercritical water is extremely low. The existing supercritical water treatment system has not carried out thorough desalination treatment. Salt deposition is likely to cause blockage of pipelines and reactors. The treated water has a high salt content and is difficult to recycle

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