Welcome to visit Beijing Songyuan Huaxing official website!
E-mail: sales@bjsyhx.com.cn
Product List
Breaking News
What are the advantages of a laboratory freeze dryer used in a laboratory over conventional methods?
The laboratory freeze dryer uses the physical principle to freeze the moisture in the compressed air to below the dew point, so that it can be precipitated from the air....
Analysis on the drying principle of freeze dryer
I believe everyone is familiar with freeze dryers. Such a machine that integrates freezing and drying has been favored by most experiments. The principle of freeze drying of freeze dryers is actually not complicated. Freezing and drying are divided into two processes. ...
How to properly maintain an industrial vacuum freeze dryer?
Industrial vacuum freeze dryer is composed of refrigeration system, vacuum system, heating system, electrical instrument control system. ...
What is the control system of industrial vacuum freeze dryer?
The control system of industrial vacuum freeze dryer is the command mechanism of the whole machine....
Analysis of periodic inspection and maintenance methods of pilot freeze dryer
Repair and eliminate the leakage and failure of the refrigeration system, vacuum system and heating system, and check whether the indicators of the pilot freeze dryer are in a normal state;...
Contact Us
Beijing Songyuan Huaxing
Service Line:+86-13161061291
Song Yuan:+86-13161061291
Address:C706 Changyin Building, NO.88 Yongding Road, Haidian District, Beijing, China
Your Location: Home >> News >> Technical support >> Comparison of the advantages and disadvantages of soil drying and air drying

Comparison of the advantages and disadvantages of soil drying and air drying

Release Date: 2018/12/6 17:36:28 .
Browse: 685


The microstructure test of the soil requires dry samples. Traditional drying methods, such as air drying and drying methods, have the disadvantages of shrinking the volume of the soil sample and changing the microstructure of the soil, and the reduction of the moisture content of the clay. Its microstructure will also change and its size will shrink. Conventional air drying and drying methods tend to make large changes in the microstructure of the soil, which cannot meet the test accuracy of microstructure research. The soil samples prepared by vacuum freeze-drying through a soil freeze dryer ensure that the microstructure of the soil samples does not change after dehydration.

Comparison of soil freeze dryers and drying air drying methods:

Air drying method. Due to the large surface tension of the liquid in the pores at normal temperature, the soil sample is often contracted and cracked, the soil particles are rearranged, and the pore state changes.

Drying method. Due to the uneven distribution of molecular stress during moisture migration in soil samples, cracks and volume shrinkage occur, and physicochemical interactions between soil particles can occur at high temperatures.

Freeze-drying method. The lyophilizer firstly turns the liquid water in the soil sample into amorphous ice without causing volume expansion, and then sublimates the water under a low temperature vacuum to discharge the vacuum piping system, so that the soil sample is dried.

share to:
Songyuan Freeze Dryer logo
Address:C706 Changyin Building, NO.88 Yongding Road, Haidian District, Beijing, China
Email:sales@bjsyhx.com.cn Facebook:SYHXfreezedryer