A material ultra-high-speed heating system

Abstract

The invention discloses an ultrahigh speed material heating system which comprises a reaction device, a gas inlet device, a powder feeding device and a flue gas analysis device. The reaction device is connected with a high-temperature plasma generator in a sealing manner; the gas inlet device conveys gas into the high-temperature plasma generator; high temperature plasmas generated by the high-temperature plasma generator are fed into a reactor from the bottom of the reaction device; material particles are radially injected through a stainless steel pipe by carrier gas, and the material burning process is recorded by a high-speed camera and a CCD (Charge Coupled Device) camera; a temperature in the reactor is represented by a thermocouple; and the flue gas analysis device is used for collecting and detecting burnt material and gas phase parts. The ultrahigh speed material heating system uses the plasmas as a high-temperature heat source, can meet the requirement for ultrahigh speed material heating, reaches the requirement of industries of coal, power, chemical engineering, metallurgy and the like for high speed heating, also meets the high speed heating temperature in the scientific research process, and has the advantages of simple structure, easiness for operation and the like.

Description

technical field [0001] The invention belongs to the field of rapid heating and temperature raising devices for materials in industries such as energy, agriculture, chemical industry, iron and steel metallurgy, aerospace, environmental protection, experimental scientific research, etc., and more specifically relates to an ultra-high-speed material heating system. Background technique [0002] Commonly used solid fuels mainly include biomass, pulverized coal and solid waste. The combustion of solids, especially pulverized coal, as the most common way of energy utilization, has attracted widespread attention. The main heat transfer mode of the actual combustion process of pulverized coal in the boiler is radiation and convective heat transfer, and its temperature rise rate reaches 10000K / S. The combustion of pulverized coal is simulated by the experimental device to study the combustion characteristics of pulverized coal and reveal the combustion reaction of the flame. It can p...

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Problems solved by technology

However, this device has the following problems: 1) The high-temperature flue gas is produced by using an advection flame, and the concentration of carbon dioxide in the flue gas is relatively large, which is inconsistent with the actual flue gas. Difficulty; 2) The device uses PLIF to optically measure the pulverized coal, which can only detect the local ignition characteristics of the pulverized coal. Regarding the ignition temperature of the pulverized coal, the ignition mechanism (homogeneous or heterogeneous combustion), and the combustion time, etc. Combustion characteristics cannot be detected; 3) The device uses a transparent combustion chamber, but does not use any heat preservation device, which is not conducive to the burnout of pulverized coal

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