Multi-layer spraying and burning evaporation wall type supercritical water oxidation reactor

Abstract

The invention relates to a multi-layer spraying and burning evaporation wall type supercritical water oxidation reactor. The multi-layer spraying and burning evaporation wall type supercritical water oxidation reactor mainly consists of a barrel body, an upper end cover, a lower end cover, a burner and an evaporation wall, wherein the barrel body, the upper end cover and the lower end cover are fixedly arranged respectively; the evaporation wall is arranged in the barrel body, and a reactant outlet is formed in the lower end cover. The multi-layer spraying and burning evaporation wall type supercritical water oxidation reactor is characterized in that the burner is a multi-layer burner, wherein the multi-layer burner consists of a central burner arranged on the centers of the end covers and at least one lower-layer burner positioned on the lower part of the first burner, a ring-shaped narrow gap is formed between the central burner and the lower-layer burner; a fuel and oxygen gas mixture inlet is formed in the center; and a sewage and oxygen gas mixture inlet communicated with the ring-shaped narrow gap is formed in the lower-layer burner. The multi-layer spraying and burning evaporation wall type supercritical water oxidation reactor disclosed by the invention is scientific and reasonable in structural design, the blockage and corrosion of a pre-heater, a reactor and a pipeline can be effectively overcome, the amount of purified water for the evaporation wall is reduced, the size of the reactor is reduced and the amount of precious alloys is reduced.

Description

technical field [0001] The invention relates to a supercritical water oxidation reactor in the field of environmental protection technology, in particular to a multilayer spray-fired evaporation wall type supercritical water oxidation reactor. Background technique [0002] At present, the main methods used in the industrial treatment of water samples containing organic compounds are oxidation, adsorption filtration, and incineration. Among them, there will still be residual organic matter in the water samples treated by the oxidation method and adsorption filtration method, while the treatment cost of the incineration method is relatively high, and substances such as dioxins will be produced, which require subsequent treatment. [0003] Supercritical water oxidation (SCWO) technology was first proposed by American scholar Modell in the mid-1980s as a deep oxidation technology that can completely and thoroughly destroy the structure of organic matter. In "Energy and Environm...

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Problems solved by technology

The reactor of this kind of structure has the following disadvantages: 1. It is formed with a fuel inlet and an oxygen inlet at the center of the end cover, which requires a large amount of auxiliary fuel and concentrates in high-temperature areas, and the processing capacity is small, so it is difficult to scale up industrially; 2. Since the evaporating wall is in a supercritical state, the phenomenon of salt hanging on the upper evaporating wall is serious, and a large amount of pure water is needed for washing, which is very easy to cause salt precipitation and wall hanging

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