Radiant Tube Heated Rotary Hearth Furnace

Abstract

The invention discloses a radiant tube-heated rotary hearth furnace. The rotary hearth furnace comprises a furnace body, a radiant tube and a heat transfer enhancement device. The furnace body comprises a hollow annular cavity. A hearth space is defined in the hollow annular cavity. Rotatable furnace bottoms are arranged at the bottom of the hollow annular cavity. The furnace bottoms adopt hollow annular structures. A furnace bottom space is defined between the furnace bottoms. The furnace bottom space communicates with the hearth space by virtue of a plurality of communicating holes. The radiant tube is arranged in the hearth space. The heat transfer enhancement device is arranged on the furnace body to enable airflow in the furnace body to pass through materials placed on one furnace bottom by virtue of the communicating holes to flow from the hearth space to the furnace bottom space or from the furnace bottom space to the hearth space. According to the rotary hearth furnace, the airflow in the furnace body can pass through the materials on the furnace bottom upwards and downwards alternately, and the heat convection between gas in the furnace body and the materials is enhanced, so that the heat exchange capability of the rotary hearth furnace is improved, and the pyrolysis rate of the materials is increased.

Description

technical field [0001] The invention relates to the technical field of pyrolysis, in particular to a radiant tube heating rotary hearth furnace. Background technique [0002] In related technologies, the internal temperature rise rate of the material in the radiant tube heating rotary hearth furnace limits the pyrolysis rate of the material, and the main reason for the low internal temperature rise rate of the material in the radiant tube heating rotary hearth furnace is as follows: the high temperature air flow is difficult to penetrate the material layer , the radiation heat transfer cannot reach the inside of the material; the thermal conductivity of the material is small, and the heat conduction and heat transfer capacity is low. Contents of the invention [0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, it is an object of the present invention to propose a radiant tube heated rotary hearth furn...

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Problems solved by technology

[0002] In related technologies, the internal temperature rise rate of the material in the radiant tube heating rotary hearth furnace limits the pyrolysis rate of the material, and the main reason for the low internal temperature rise rate of the material in the radiant tube heating rotary hearth furnace is as follows: the high temperature air flow is difficult to penetrate the material layer , the radiation heat transfer cannot reach the inside of the material; the thermal conductivity of the material is small, and the heat transfer capacity is low

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