An in-situ rapid sampling thermogravimetric analyzer

Abstract

The invention discloses an in-situ rapid sampling thermogravimetric analyzer. The in-situ rapid sampling thermogravimetric analyzer comprises a worktable, a heating furnace, a sample holder, a sampling probe, a heat preservation pipe, a furnace temperature control device and a data analysis device, wherein the heating furnace is arranged on the worktable; the sample holder is mounted on an electronic balance in the worktable and stretches into a hearth, and a crucible is arranged on the sample holder; the sampling probe is mounted on the heating furnace and is located above the crucible; the heat preservation pipe sleeves the outer part of the sampling probe and is internally provided with an ultrafine capillary tube; the ultrafine capillary tube stretches into the heat preservation pipe and the sampling probe in sequence and extends into the crucible; the furnace temperature control device is used for detecting and controlling the temperature of the heating furnace; and the data analysis device is used for acquiring weight and temperature signals. With the adoption of the in-situ rapid sampling thermogravimetric analyzer, the problems that a measurement error is large and a pipeline is easily blocked by a product can be effectively solved; and the in-situ rapid sampling thermogravimetric analyzer has the advantages of high measurement precision, convenient for operation, simple structure and the like.

Description

technical field [0001] The invention belongs to the field of thermogravimetric analysis instruments, and more specifically relates to an in-situ rapid sampling thermogravimetric analyzer. Background technique [0002] Thermogravimetric analyzer refers to an analytical instrument that measures the weight of a substance changing with temperature under controlled temperature conditions. It can reflect the change law of the weight of a substance during heat treatment. It is widely used in chemical industry, geology, biology, energy, environment, etc. field. However, thermogravimetry can only perform simple quantitative analysis on reactants. In practical applications, there are often multiple reactions between reactants occurring simultaneously, which is difficult to reflect on thermogravimetric data. In order to further understand the details of the reaction and determine the reaction mechanism, it is necessary to combine thermogravimetry with other gas analyzers (such as gas ...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides an in-situ rapid sampling thermogravimetric analyzer, the purpose of which is to overcome the measurement caused by product gas diffusion or secondary reaction in the existing combined thermogravimetric technology The problem of error, through the research and design of the structure and specific setting methods of its key components such as heating furnace, sample rack, sampling probe and insulation tube, can effectively solve the problem of large measurement error, and the product is easy to block the pipeline At the same time, it also has the advantages of high measurement accuracy, convenient operation and simple structure.

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