Double-furnace body thermobalance capable of changing temperature quickly

Abstract

The invention discloses a double-furnace body thermobalance capable of changing temperature quickly, which comprises a reactor, a double-furnace heating device, an electronic scale weighing device and a temperature sensor, wherein the reactor is formed by an inner tube and an outer tube in a nested manner; a reaction gas inlet is formed in the side wall at the bottom end of the outer tube; an air inlet and an air outlet are formed in the top surface and the lower side wall of the inner tube respectively; a sample is arranged in the inner tube; airflow enters the outer tube through the gas inlet, is baffled at the top of the outer tube, enters the inner tube through the air inlet in the top of the inner tube, and then is discharged through the air outlet of the inner tube; the double-furnace heating device comprises an inner heating furnace and an outer heating furnace, a concave cavity is arranged in the middle of the outer heating furnace, the reactor is placed in the concave cavity, and the inner heating furnace is placed in the cavity between the reactor and the inner wall of the outer heating furnace. The double-furnace body thermobalance capable of changing temperature quickly, provided by the invention, is simple in structure and low in cost, and can satisfy the thermobalance experience, which requires different sample amounts, different temperature rising rates, different atmospheres including vapor, and quick switching between two different reaction temperatures.

Description

technical field [0001] The invention belongs to the technical field of electric heating experimental equipment, and in particular relates to a rapid temperature-variable double-furnace thermal balance, which is mainly suitable for large-sample thermogravimetric experiments of solid samples in different atmospheres, different heating rates, and rapid cycle switching between different reaction temperatures Test and analyze. Background technique [0002] A thermobalance is an instrument that measures the mass of a sample as it changes with temperature under programmed temperature control conditions. Traditional thermobalances are complex in structure, difficult to process, and expensive. Usually, micro samples (less than 20 mg) are analyzed under the conditions of conventional reaction atmosphere and slow temperature program (0-25°C / min). [0003] Many cyclic reaction processes need to switch repeatedly at different temperatures, such as metal oxides undergoing oxidation and r...

AI Technical Summary

Problems solved by technology

The traditional thermobalance has complex structure, difficult processing, and high price. It usually analyzes micro-sample (less than 20mg) under the condition of conventional reaction atmosphere and slow temperature program (0-25°C / min).

[0003] Many cyclic reaction processes need to switch repeatedly at different temperatures, such as metal oxides undergoing oxidation and reduction processes in chemical looping combustion, CO 2 Calcium-based oxides are cyclically calcined and carbonated during capture. The temperature of the two reaction processes is different in each cycle, and the number of cycles needs to be dozens or even hundreds of times. However, the conventional thermal balance has a slow heating and cooling rate and cannot meet this requirement. Class Experiment Requirements

[0004] Chinese patent, publication date: August 11, 2010, publication number: CN101799242A, application number: 201010104591.9 Invention patent "a controllable rapid temperature rise thermal balance reaction furnace", using the balance lifting mechanism to quickly put the sample into the high temperature furnace to achieve Rapid heating, but during this process, the balance is in motion, and the weighing fluctuation will be large

Images