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Supercritical water oxidation reaction apparatus and method

A supercritical water oxidation and reaction device technology, which is applied in the direction of oxidized water/sewage treatment, etc., can solve the problems of prolonged reaction time, large heat consumption, and lower temperature of the reaction zone, so as to reduce requirements and manufacturing difficulties, and reduce equipment manufacturing costs , cost reduction effect

Active Publication Date: 2014-04-09
ENN SCI & TECH DEV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main heat exchange part 406 of the reaction device 400 is directly placed in the reaction zone, which will directly absorb the heat generated by the reaction, resulting in a decrease in the temperature of the reaction zone or a prolonged reaction time, resulting in the need to consume a large amount of heat

Method used

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  • Supercritical water oxidation reaction apparatus and method
  • Supercritical water oxidation reaction apparatus and method
  • Supercritical water oxidation reaction apparatus and method

Examples

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Effect test

example 1

[0050] Use the sludge slurry with a concentration of 5% as the original reaction raw material, and preheat it to about 280°C to form the raw material A to be preheated, enter the raw material A to be preheated from the material input pipe 2 into the heat exchange coil, and use The reaction heat released by the oxidation reaction in the reaction zone of the inner casing is preheated. After preheating, the temperature of the material reaches about 480 ° C. The reaction raw material B is discharged from the raw material output pipe 1 and then transported to the reactant nozzle 3 . Afterwards, reaction raw material B and oxidizing agent C (for example, the oxygen of normal temperature, oxidizing agent consumption is 110% of COD content in the raw material) enter the reaction zone of inner housing 8 respectively from the central tube of reactant nozzle 3 and annular structure, wherein reaction raw material B is mixed with oxygen to carry out supercritical water oxidation reaction, t...

Embodiment 2

[0054] Use coal-water slurry with a concentration of 10% as the original reaction raw material, and preheat it to about 300°C to form the raw material A to be preheated, enter the raw material A to be preheated from the material input pipe 2 into the heat exchange coil, and use The reaction heat released by the oxidation reaction in the reaction zone of the inner casing 8 is preheated. After preheating, the temperature of the material reaches about 500°C. Afterwards, reaction raw material B (coal-water slurry) and oxidant C (for example, the oxygen that preheats to about 80 ℃, the oxidant consumption is 10% of COD content in the raw material) enters from the center tube of reactant nozzle 3 and the annular structure respectively. In the reaction zone of the shell 8, the reaction raw material B is mixed with oxygen to perform supercritical water oxidation reaction, the reaction temperature is about 663° C., and the pressure is 25-26.3 MPa. The high-temperature reaction product ...

Embodiment 3

[0058] Such as Figure 4 As shown, using waste water with a COD content of about 32500mg / L and an ammonia nitrogen content of about 120mg / L as the original reaction raw material, and preheating to about 350°C to form the raw material A to be preheated, the preheated Raw material A is delivered to reactant nozzle 3 . Afterwards, the raw material A and oxygen to be preheated enter the reaction zone of the inner housing 8 from the central tube and the annular structure of the reactant nozzle 3 respectively, wherein the reaction raw material B is mixed with oxygen to carry out supercritical water oxidation reaction, and the reaction temperature is about 530°C, the pressure is 28-30MPa.

[0059] In this example 3, supercritical water with a temperature of about 385° C. and a pressure of about 28.5-32 MPa is used as the bubbling medium D to enter the interior of the inner shell 8 from the bubbling medium delivery pipe 15 and pass through the dispersion holes 18 on the shield 19 Th...

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Abstract

The invention relates to a supercritical water oxidation reaction apparatus, which comprises a case body produced by an overpressure-resistant material; an inner case body produced by a heatproof material, wherein the inner case body is supported in the outer case body, an interval zone is provided between the inner case body and the outer case body, and the interval zone is isolated with cavity fluid; an end cap arranged at the open end of the inner case body and the outer case body in a sealing mode; a reactant nozzle arranged on the end cap and used for injecting an oxidizing agent and a reaction raw material into the inner case body, so that the oxidizing agent and the reaction raw material are subjected to an oxidation reaction near the reactant nozzle to form a reaction zone and generate the reaction products; and a products outlet arranged on the inner case body and extended to the outside part of the outer case body to discharge the reaction products outwardly. A cooling medium is provided in the interval zone. The invention also provides a supercritical water oxidation reaction method. The effective separation is carried out through a high-temperature region and a high-pressure area supported by the wall of a reactor by using the inner case body and the outer case body; the material selection difficulty and manufacture difficulty of the supercritical water oxidation reaction apparatus can be reduced, and the cost is effectively reduced.

Description

technical field [0001] The present invention relates to a supercritical oxidation reaction device in the field of environmental protection, in particular to a device for treating carbonaceous substances such as sewage, sludge, coal, biomass, waste plastics, etc. by using the principle of supercritical water oxidation, and using the device to process Method of supercritical oxidation reaction. Background technique [0002] Supercritical water refers to water when the density of water expanded due to high temperature is exactly the same as that of water vapor compressed due to high pressure when the pressure and temperature reach a certain value. At this time, there is no difference between the liquid and gas of water, and they are completely blended together to become a new kind of water in a state of high pressure and high temperature. Generally, supercritical water exists under ambient conditions with a temperature of 374° C. or higher and a pressure of 22.1 MPa or higher....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72
Inventor 张玉宝程乐明王青高志远谷俊杰刘扬曹雅琴宋庆峰宋成才杜娟
Owner ENN SCI & TECH DEV
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