Device for detecting moisture isothermal adsorption and desorption of biomass

Abstract

A device for detecting moisture isothermal adsorption and desorption of biomass comprises a gas premixing system, a constant temperature control system, a humidity control system, a weighing system, a data collecting and recording system, and the like. The device has the advantages that (1) working temperature and humidity intervals are wide, wherein the adjustment ranges of the temperature and humidity are as follows: the temperature ranges from 5 DEG C to 50 DEG C, the control accuracy is 0.3 DEG C, the relative humidity ranges from 5% to 95%, and the control accuracy is 3%; a constant temperature tank inner container is made of high heat conduction metal so that the temperature stability is good; and the device is provided with an external heating and refrigerating circulation device so that heating and refrigerating are fast, and reliability and stability of a test are ensured; (2) the weighing system is arranged in the device with the quality measurement range of 100g and accuracy of 0.0001g; weight information of a test sample can be continuously collected through a computer so that inconvenience of frequent sampling is avoided, influences on test conditions during sampling are removed, and the test is ensured to be performed under stable conditions; and (3) test parameters are conveniently set and can achieve automatic adjusting and real-time monitoring.

Description

[0001] technical field [0002] The invention relates to a device for isothermal adsorption and desorption of biomass moisture, in particular to a device used in the field of tobacco processing to detect the isothermal adsorption and desorption process of moisture in biomass (sheet tobacco or shredded tobacco). Background technique [0003] Sheet tobacco or shredded tobacco is a porous medium composed of complex organic substances. During the heat and humidity treatment process of tobacco processing, the pore structure of tobacco leaves or shredded tobacco may undergo some changes. The surface properties will cause certain changes in the ability of moisture in the processed tobacco or cut tobacco samples to absorb moisture and remove moisture under certain temperature and humidity conditions. When evaluating the isothermal adsorption and desorption capacity and change law of treated tobacco or shredded tobacco samples to moisture, it usually includes multiple continuous heat...

AI Technical Summary

Problems solved by technology

At present, most detection methods use constant temperature and humidity chambers to set different temperature and humidity conditions, carry out process detection, and obtain process change data through offline weighing. However, most of the existing commercial online detection products have a sample load of less than 30mg. Detection, the temperature control range is above normal temperature (cannot be lower than normal temperature) or cannot use the same set of equipment to complete the experimental detection work of continuous humidity adjustment

In addition, the adjustment and control of the humidity and temperature of the existing detection device has a long response time, and the stability is difficult to meet the experimental requirements.

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