A burner assembly of a supercritical water oxidation reactor

Abstract

The invention relates to a burner assembly of a supercritical water oxidation reactor. The burner assembly comprises a nozzle sleeve, a cooling water sleeve and a cooling water first permeating wall, wherein the nozzle sleeve comprises a center sleeve, an interlayer sleeve and an outermost layer sleeve; the center sleeve, the interlayer sleeve and the outermost layer sleeve of the nozzle sleeve and the cooling water first permeating wall are sequentially and coaxially mounted in a flat head and a connection flange of the reactor in a sheathing way from inside to outside, annular gaps are formed among the sleeves, and the lower ends of the sleeves form annular outlets descending step by step, the center sleeve is communicated with a top material channel vertically inserted from the flat head, the annular gaps are respectively communicated with the material channel and an oxidizing agent channel, the cooling water sleeve is closed with the bottom of the first permeating wall, and an annular cavity formed inside is communicated with a side wall first cooling water inlet. By adopting the nozzle sleeve, materials and an oxidizing agent can respectively enter the reactor step by step alternatively from different layer sections, and the condition of reactor corrosion caused by reflux combustion due to too early mixing is avoided.

Description

technical field [0001] The invention relates to high temperature and high pressure chemical equipment, in particular to a burner assembly of a supercritical water oxidation reactor. Background technique [0002] 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 Environment", one of the six major fields listed in the US National Key Technologies, it is pointed out that the most promising waste treatment technology is the SCWO method. [0003] Supercritical water (SCW) refers to water in a special state with a temperature exceeding 374.15°C and a pressure exceeding 22.12Mpa. Under this condition, the dielectric coefficient of water is greatly reduced, and oxidants and various organic substances form a homogeneous phase in the water system, eliminating mass transfer. Resistance, so that the hetero...

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Problems solved by technology

Moreover, the high-temperature gas makes it difficult to select the gas outlet pipeline instruments and valves of the equipment, and has high requirements on the material of the pipeline for transporting gas.

In addition to pipeline materials, the operating temperature of commonly used instruments and valves is below medium and high temperatures. When the temperature is too high, instruments and valves need to use high-alloy materials. The cost of high-alloy materials is several times higher than ordinary materials, resulting in the cost of the entire process system. High cost

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