Ultra-high temperature pulverized coal combustion experiment device

Abstract

The invention discloses an ultra-high temperature pulverized coal combustion experiment device, belongs to the technical field of blast furnace ironmaking, and solves the problem of combustion ratio detection of pulverized coal under an ultra-high temperature condition. Meanwhile, the device can be applied to combustion ratio detection of novel fuels such as biomass. The device comprises a gas mixing tank, a gas preheating furnace, a gas accelerator, a pulverized coal screw feeder, a flow meter, a rapid cut-off valve, a mixing pipe, an electric arc combustion chamber, an electric arc control cabinet, a dust collector, a secondary dust remover, a gas analyzer, a computer, a data wire and a tail gas treatment device. By adopting the ultra-high temperature pulverized coal combustion experiment device, the pulverized coal can be evenly and continuously sprayed into the combustion chamber according to different flows; meanwhile, hot air is accelerated by adopting the gas accelerator; ultra-high temperature pulverized coal is generated by adopting the electric arc combustion chamber; the combustion state of the pulverized coal can be closer to the actual work condition of a blast furnace. Therefore, reasonable technological parameter and coal injection scheme are provided for efficient combustion of the pulverized coal of the blast furnace.

Description

technical field [0001] The invention relates to an experimental device for simulating ultra-high temperature pulverized coal combustion, and belongs to the technical field of blast furnace ironmaking. technical background [0002] With the pressure of cost and environment, pulverized coal injection in blast furnace and greatly increasing coal ratio and reducing coke ratio are the development trend of ironmaking technology in the world, and it is also one of the most effective measures to reduce ironmaking cost. Enhancing the combustion of pulverized coal in the tuyere swirl is the key to increasing the amount of coal injected into the blast furnace. Therefore, it is necessary to study the high-efficiency pure oxygen combustion of dense phase coal pulverized coal under blast furnace conditions to reveal the kinetic mechanism of oxygen-coal combustion reaction and obtain the key control parameters for high-efficiency oxygen-coal combustion. [0003] Although the current exper...

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Problems solved by technology

[0003] Although the current experimental equipment for detecting the combustion rate of pulverized coal has been continuously improved, it still has the following shortcomings: First, the detection process is mostly intermittent injection, and the airflow velocity and coal injection speed cannot be controlled; The temperature is low and mostly constant, and the temperature of the hot blast cannot be adjusted; third, the flow velocity of the hot blast is small, which is far from the actual flow velocity of the blast furnace, and cannot accurately simulate the operation status of blast furnace pulverized coal on site; fourth, the temperature of the pulverized coal combustion chamber is low and cannot Simulation of temperature in tuyere swirl zone of blast furnace

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