Method for simulating visualization of dynamic distribution characteristics of oxygen concentration in high-temperature carbonization furnace

Abstract

The invention discloses a method for simulating visualization of dynamic distribution characteristics of oxygen concentration in a high-temperature carbonization furnace, and relates to the technicalfield of real-time monitoring methods for oxygen concentration distribution in high-temperature carbonization furnaces used in carbon fiber production. The method comprises the following steps: (1), constructing a three-dimensional mathematical model for full-flow-field calculation of a high-temperature carbonization furnace; (2), establishing three-dimensional simulation models of a muffle cavityand an inlet and outlet sealing cavity of the high-temperature carbonization furnace by adopting three-dimensional CAD software SOLIDWORKS, and setting related parameters; (3), carrying out mesh generation on the three-dimensional simulation models; (4), importing the three-dimensional simulation models subjected to grid division into an Ansys Fluent module, and setting the Ansys Fluent module; (5), setting a detection point and a detection surface, and performing simulation operation to obtain a simulation result; and (6), under the same setting condition, setting different parameters and repeating the step (2) and the step (5) so as to carry out simulation calculation for multiple times. According to the method, the oxygen concentration distribution state in the high-temperature carbonization furnace can be visually judged, oxygen in the furnace can be better monitored, and the reasonable nitrogen supplementing airflow speed in the furnace can be determined, so that theoretical dataare provided for reducing the oxygen concentration.

Description

technical field [0001] The invention relates to the technical field of a real-time monitoring method for oxygen concentration distribution in a high-temperature carbonization furnace used in carbon fiber production. Background technique [0002] Carbon fiber production is a high-energy-consuming industry. The high-temperature carbonization furnace is one of the largest energy-consuming households in carbon fiber production equipment. At the same time, the high-temperature carbonization furnace is also a key equipment for carbon fiber production. Converted to carbon fiber with a carbon element content greater than 90%. High-temperature carbonization furnace is an integration of high-temperature technology and high-temperature equipment, and the operating temperature is generally 1000°C-1600°C. Carbonization is a pyrolysis and polycondensation reaction in an inert gas. There should be no oxygen in the carbonization furnace. The presence of oxygen will cause a chemical reactio...

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Problems solved by technology

[0003] In summary, the purpose of the present invention is to solve the problem that the oxygen concentration in the existing high-temperature carbonization furnace does not carry out real-time monitoring. When the oxygen content exceeds the standard, the equipment cannot alarm, resulting in chemical reactions in the furnace, and shortening the life of the furnace body for a long time. Due to the lack of technology for product quality decline, a simulation method for visualizing the dynamic distribution characteristics of oxygen concentration in a high-temperature carbonization furnace is proposed; by simulating the oxygen concentration in the furnace during the design process, a reasonable gas flow rate for nitrogen supplementation in the furnace is determined. And visualize the dynamic distribution characteristics of the oxygen concentration in the furnace

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