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A multi-point oxygen injection and segmented mixing device for supercritical water oxidation reaction tubular reactor

A supercritical water oxidation, tubular reactor technology, applied in chemical/physical/physical-chemical stationary reactors, feeding devices, chemical instruments and methods, etc., can solve the problems of oxygen waste and reduce system economy, etc. Achieve the effect of optimizing the reaction route, improving the service life and preventing local over-temperature

Active Publication Date: 2018-06-26
XI AN JIAOTONG UNIV
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Problems solved by technology

In order to prevent salt deposition in the tubular reactor, the flow rate of the material in the tube can generally reach several meters per second. If the oxygen and the material are not mixed uniformly at such a high flow rate, the material will be broken when the reaction does not fully occur. Flow out of the reactor, causing a waste of oxygen and reducing the economics of the system

Method used

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  • A multi-point oxygen injection and segmented mixing device for supercritical water oxidation reaction tubular reactor
  • A multi-point oxygen injection and segmented mixing device for supercritical water oxidation reaction tubular reactor

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0028] see figure 1 , the invention discloses a multi-point oxygen injection and segmented mixing device for a supercritical water oxidation reaction tubular reactor. Several reaction main pipes of the reactor are provided with an oxygen injection port 2, and each oxygen injection port 2 is provided with a core pipe 4 that can extend into the reaction main pipe, and several groups of pipes are provided on the core pipe 4 for Pores 5 for diffusion of oxygen. The core tube 4 is also sheathed with a number of helical parts 3 with stirring and supporting functions. The central part of the helical part 3 is discontinuous, and it is made into a ring structure to cover the outside of the core tube, and the top of the helical part 3 just fits the inner wall of the reaction main tube.

[0029] The ...

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Abstract

The invention discloses a multi-point oxygen injection and subsection mixing device for a supercritical water oxidizing reaction tubular reactor. The tubular reactor comprises a plurality of reaction main tubes provided with main material inlets. Each reaction main tube on the tubular reactor is provided with an oxygen injection inlet. Each oxygen injection inlet is provided with a core tube capable of extending into the corresponding reaction main pipe. Each core tube is provided with a plurality of sets of small holes for oxygen diffusion. The oxygen concentration of each area is effectively reduced, the local reaction degree is lowered, in this way, uniform oxygen injection can be achieved, the material corrosion tendency is reduced, the safety of the tubular reactor is improved, and the service life of the tubular reactor is prolonged.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a multi-point oxygen injection and segmented mixing device for a supercritical water oxidation reaction tubular reactor. Background technique [0002] Supercritical water oxidation (SCWO) is a new technology used to treat difficult organic wastewater. Water has many special properties above the supercritical point (374°C, 22.1MPa), such as the sharp decrease in the ion product constant, density and viscosity of water, and the increase in diffusivity, resulting in supercritical water having extremely high solubility for organic matter and gases , organic matter can be almost completely dissolved in supercritical water. Therefore, using this special property of supercritical water, it can be used as a reaction medium for the oxidation reaction of organic matter. [0003] Supercritical water oxidation reaction is an ideal organic wastewater oxidation treatme...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72B01J4/00B01J19/18
CPCB01J4/001B01J19/1812C02F1/72C02F2201/002
Inventor 王树众杨健乔王玉珍张拓王来升王明宋文瀚
Owner XI AN JIAOTONG UNIV
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