A measuring device and measuring method for fuel particle thermal state collision restitution coefficient

Abstract

The invention discloses a fuel particle hot collision recovery coefficient measurement device and a measurement method. A combustion system and a collision system are arranged in a sealed cavity which is connected with a gas source, and the combustion atmosphere can be adjusted by a flow valve; a combustion reaction device is a tubular electrical heating furnace with a temperature control function and can realize heating of the fuel particle; the temperature of the fuel particle is tracked by an infrared thermal imaging instrument, so that the temperature of particle collision in a non-contact manner can be measured; a high-speed camera is adopted to capture the movement images of the fuel particle before and after collision, the speed of the fuel particle before and after collision can be acquired through image analysis and the collision recovery coefficient can be computed. The device can measure the particle collision recovery coefficient in a high-temperature hot state, and has important practical value on the mathematical modeling of a hot fluidized bed; different from the cold state experiment, the hot working status is more close to the real fuel combustion environment in the fluidized bed, therefore, the obtained experimental data can be used for analyzing and judging the agglomeration and caking tendency during fuel combustion.

Description

technical field [0001] The invention belongs to the fields of energy engineering and chemical engineering, in particular to a measuring device and a measuring method for the collision restitution coefficient of fuel particles under thermal working conditions. Background technique [0002] The collision restitution coefficient of particles can be defined by the ratio of the rebound velocity of particles after collision to the velocity before collision, that is, e=|V R | / V, where V R refers to the rebound velocity of particles after collision, V refers to the velocity of particles before collision, and the physical meaning of collision restitution coefficient is to describe the energy loss before and after collision. [0003] In the numerical simulation of fluidized bed combustion reactors (such as fluidized bed, spouted bed), the collision recovery coefficient of fuel particles (such as coal particles, biomass particles, waste plastic particles, etc.) is one of the key param...

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Problems solved by technology

[0010] Technical problem to be solved: Aiming at the deficiencies of the prior art, the present invention proposes a thermal state collision restitution coefficient measuring device and method for solid fuel particles, which solves the problem that the existing conventional collision restitution coefficient measurement Technical Problems in Measuring Collision Restitution Coefficient

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