A kind of high-temperature soot gas jet experimental device and method

Abstract

The invention provides a high-temperature soot gas jet experiment device and method, belonging to the technical field of jet devices. The high-temperature soot gas jet experiment device comprises a jet flow outlet control component, a gas heating and storage component, a driving component and an auxiliary component; wherein the jet flow outlet control component comprises an outer jet flow tube, ajet flow guiding structure and a first insulating layer; the gas heating and storage component comprises an outer sleeve hermetically connected with the outer jet flow tube, an inner sleeve arranged in the outer sleeve, a bottom plate connecting the lower edge of the outer sleeve with the lower edge of the inner sleeve, a second insulating layer arranged on the inner wall of the outer sleeve, a third insulating layer arranged on the outer wall of the inner sleeve, a heating part arranged on the third insulating layer, a baffle arranged in the inner sleeve, and a transmission member; the transmission member is connected with the driving component; and the auxiliary component comprises a sealed sieve, a soot particle injection pipe, a dynamic and static pressure testing sensor, a temperaturedetecting sensor and a smoke generator. The device of the invention can form high-emperature soot gas with stable speed and controllable temperature.

Description

technical field [0001] The invention relates to the technical field of jet devices, in particular to a high-temperature soot gas jet experimental device and method. Background technique [0002] Volcanic eruption, chimney exhaust, fire, explosion, steelmaking and coking and other high-temperature pollution discharge, the diffusion law of pollutant diffusion is the entrainment and diffusion of particles carried by high-temperature gas at a certain initial velocity, and the particles in the airflow are in the flow field. Diffusion movement in the influence. The gas has low density and small specific heat. It is difficult to form a uniform and constant temperature jet by directly heating the gas and exporting it. At the same time, the gas is easy to be compressed, so it is impossible to form a stable jet through simple extrusion. , the density of the gas will change greatly during the heating process. For example, when the air is heated from 20°C to 500°C, the density of the g...

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Problems solved by technology

The gas has low density and small specific heat. It is difficult to form a uniform and constant temperature jet by directly heating the gas and exporting it. At the same time, the gas is easy to be compressed, so it is impossible to form a stable jet through simple extrusion. , the density of the gas will change greatly during the heating process. For example, when the air is heated from 20°C to 500°C, the density of the gas will change from 1.25kg⁄m 3 Reduced to 0.45kg⁄m 3 , the airtight heating method will inevitably form a large pressure in the volume, and the constant jet velocity cannot be formed in the process of direct discharge; in the gas-solid coupled jet flow generator, the most common method is the Venturi tube, but in the experiment Due to the easy compressibility of the gas, it is difficult to keep the airflow velocity and gas density consistent with the initial state when passing through the pipes with changing pore diameters, thus greatly reducing the reliability of the smoke and gas jet generation device

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