Vacuum moisture-absorption drying method and device
A technology of vacuum moisture absorption and drying method, which is applied in the direction of drying solid materials, dry cargo handling, drying chamber/container, etc., which can solve the problems of pollution and high cost, achieve low cost, reduce equipment cost, and speed up moisture absorption and drying.
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Embodiment 1
[0039] The invention provides a vacuum moisture absorption drying method, which is characterized in that the vacuum moisture absorption drying method comprises the following steps:
[0040] S1. Dehydrating the hygroscopic material by heating and drying by solar radiation or other energy thermal drying methods to obtain a dehydrated hygroscopic material;
[0041] S2. Pretreating the object to be dried, contacting and mixing the pretreated object to be dried with the dehydrated hygroscopic material;
[0042] S3. Put the contact-mixed object to be dried and the hygroscopic material into a drying container to carry out moisture absorption drying under a vacuum state, and then separate the hygroscopic material after absorbing water from the dried object to be dried.
[0043] In this embodiment, the hygroscopic material includes alum, modified alum (such as thermal acid modification, thermal alkali modification, roasting modification and mercapto modification), molecular sieve, modi...
Embodiment 2
[0054] In the present invention, the object to be dried can be pretreated as required, for example, the pretreatment in step S2 includes one of cutting, crushing, slicing, and neatly arranged; the object to be dried after the pretreatment in step S2 and The hygroscopic material after dehydration is sieved with different particle sizes (for example, belonging to different particle size ranges, micron level and centimeter level), so as to facilitate the subsequent separation of the two. In step S3, the hygroscopic material after water absorption and the drying The final separation method of the dry matter can include parabolic separation or sieving method. The parabolic separation method can separate the matter by throwing the to-be-separated matter by using different air buoyancy of different substances, and the sieving method can separate the material through a sieve.
Embodiment 3
[0056] Such as Figure 1-2 As shown, the present invention also provides a vacuum moisture absorbing device, which includes a drying container 1 for containing the contact-mixed object to be dried and the moisture-absorbing material, a vacuum pump 2, a vacuum valve 3 and an air pressure gauge 4, the vacuum pump 2 is in fluid communication with the drying container 1, the vacuum valve 3 and the air pressure gauge 4 are arranged between the drying container 1 and the vacuum pump 2, and the drying container 1 includes a vacuum bag, a vacuum box, a vacuum tank and a vacuum One of the barrels. A plurality of drying containers 1 are connected in parallel, and the vacuum pump 2 is connected to each drying container 1 through a valve 3 and a vacuum gauge 4 . This embodiment can industrialize the vacuum moisture absorption drying. Under the vacuum environment, the flow of water vapor between the drying object and the object to be dried will be accelerated, and the moisture absorption d...
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Abstract
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