Isothermal thermogravimetry apparatus

Abstract

The invention discloses an isothermal thermogravimetry apparatus. The apparatus comprises an electric furnace, a gas preheater, a tray, a walking device, a weighing device and a temperature controller, a coiled tube is arranged in the gas preheater, the front end of the coiled tube is provided with a gas flow meter, the tail end of the coiled tube is introduced to the inner side of the electric furnace, the weighing device is fixedly arranged on the walking device, the front end of the support of the weighing device is fixedly provided with the tray, and the temperature controller is used for controlling the gas preheater and the temperature in the electric furnace. The electric furnace used in the invention is a high-temperature electric furnace, and realizes heating through a high-temperature electric heating rod, the temperature controller controls the heating rate of the electric furnace, can realize the temperature programming process, and also can keep the temperature unchanged at a preset value, and the hearth of the electric furnace is made of an anticorrosive high temperature material and can resist SO2, NO, HCl and other corrosive gases, so the isothermal thermogravimetry apparatus can realize the isothermal thermogravimetry function, and also can realize temperature programming thermogravimetry of traditional thermobalances.

Description

technical field [0001] The invention relates to the technical field of thermal analysis of industrial materials, in particular to a constant temperature thermogravimetric analysis device. Background technique [0002] Thermogravimetric analysis technology is an analysis technology widely used in chemical industry, coal, scientific research and experiment fields, etc. Its technical feature is to place the sample to be analyzed in a certain high-temperature reaction environment to allow the sample to undergo dehydration, drying, pyrolysis, and combustion. Wait for physical changes or chemical reactions, and use a balance to measure the change in sample quality during the reaction process. The change in sample quality can reflect the process speed and results of the reaction, and the reaction process can be analyzed according to its changes. Therefore, it is widely used in scientific research. laboratory. [0003] In the field of thermogravimetric analysis technology, the curr...

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Problems solved by technology

In order to meet the requirements of follow-up sample analysis and flue gas analysis of reaction atmosphere, the reaction gas flow rate must be greater than 1L / min, and the sample volume for a single analysis must be greater than 1g. These requirements cannot be met by thermobalances at present, and there is no such requirement at present. thermogravimetric analysis system

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