Double-fluid external mixing type nozzle based on high-pressure water

Abstract

The invention provides a double-fluid external mixing type nozzle based on high-pressure water. The double-fluid external mixing type nozzle comprises a slurry pipe and multiple high-pressure water pipes. The high-pressure water pipes are arranged outside the slurry pipe in parallel and are evenly distributed in the circumferential direction of the slurry pipe. A slurry nozzle body is formed at the tail end of the slurry pipe. The tail ends of the high-pressure water pipes incline in the axis direction of the slurry pipe and are provided with high-pressure water nozzle bodies. The extending lines of the high-pressure water nozzle bodies intersect with the extending line of the slurry nozzle body. After high-pressure water flow in the high-pressure water pipes is sprayed out obliquely from the high-pressure water nozzle bodies, the high-pressure water flow collides with slurry sprayed out from the slurry nozzle body outside the nozzle, and the slurry is broken and atomized into small slurry drops under the colliding and shearing effects of the high-pressure water flow. The double-fluid external mixing type nozzle based on high-pressure water is particularly suitable for the supercritical water gasifier technology and has the beneficial effects of being good in anti-blockage performance, resistant to corrosion and high temperature and the like.

Description

Technical field [0001] The invention belongs to the technical field of supercritical water gasification, and particularly relates to a two-fluid external mixing nozzle based on high-pressure water. Background technique [0002] Supercritical water gasification technology is a clean energy technology that has attracted much attention in recent years. It refers to a technology that converts coal or biomass into clean energy such as hydrogen above the critical point (Tc=647K, Pc=221bar). Compared with water at room temperature, supercritical water has significantly lower polarity, can dissolve most organic substances and gases, and also has the advantages of low viscosity and strong transportation capacity, so that organic solid raw materials can react quickly in the supercritical water environment. Clean energy such as hydrogen. [0003] Since the operating pressure of the supercritical water vaporization device is higher than 221bar, the existing gas-liquid two-fluid nozzle technol...

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Problems solved by technology

[0003] Since the operating pressure of the supercritical water gasification device is higher than 221bar, the existing gas-liquid two-fluid nozzle technology is difficult to apply to the supercritical water high-pressure environment, and the generation of high-pressure gas requires a lot of compression work, resulting in waste of resources and energy. , which is not conducive to the promotion of industrial application of this technology

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