Step-heat-supplying oxygen-enrichment microwave ignition device

Abstract

The invention discloses a step-heat-supplying oxygen-enrichment microwave ignition device. The step-heat-supplying oxygen-enrichment microwave ignition device comprises a microwave heating area and anelectrical heating area, wherein the microwave heating area comprises a microwave generator and a ceramic tube capable of converting microwaves into heat energy under microwave radiation, the ceramictube is connected with a draught fan, and auxiliary airflow passes through the draught fan and can form primary oxygen-enrichment hot air through the ceramic tube; the primary oxygen-enrichment hot air is further heated through the electrical heating area, and secondary oxygen-enrichment hot air reaching the temperature required by sintering ignition is generated. According to the step-heat-supplying oxygen-enrichment microwave ignition device, the ignition mode is changed, a heat storage medium is heated in a step-heat-supplying mode through clean load energy such as microwaves or infrared or resistance, then air or hot waste gas is blown in and used for heat exchanging, high-temperature oxygen enrichment hot gas flow is formed, and therefore the oxygen-enrichment ignition aim is achieved; the ignition effect is improved, waste-gas discharging is reduced, the safer and more reliable effects are achieved, and the step-heat-supplying oxygen-enrichment microwave ignition device has theadvantages of being capable of saving energy, reducing emission, improving the quality and increasing the yield.

Description

technical field [0001] The invention belongs to the technical field of ironmaking, and more specifically relates to a microwave ignition device for cascade heating and oxygen-enrichment. Background technique [0002] The ignition of iron ore sintering needs to supply enough heat to the surface of the mixture to cause the solid fuel in it to ignite and burn. At the same time, the surface mixture is sintered under the action of high-temperature flue gas, and the sintering process is carried out from top to bottom with the help of draft. Therefore, the quality of the ignition effect directly affects the normal progress of the sintering process and the quality indicators of sintered ore. Therefore, the sintering ignition should meet the following requirements: high enough ignition temperature; certain ignition time; suitable ignition negative pressure; sufficient oxygen content in ignition flue gas; uniform ignition along the width direction of the trolley; appropriate holding t...

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Problems solved by technology

[0005] In order to solve the problem of low oxygen content in the sintering ignition process and reduce the investment cost and operating cost of microwave ignition, the present invention provides a microwave ignition device with cascade heating and oxygen enrichment. Combined heating for sintering ignition, so as to achieve the purpose of oxygen-rich ignition in the sintering process under the condition of low investment and low energy consumption

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