1092 制冷技术选讲-冷冻干燥-冷冻浓缩-低温粉碎

冷冻干燥技术与装置

部分应用

原理与特点

冷冻干燥装置

冷冻浓缩技术与装置

部分应用

原理与特点

装置与过程

溶质夹带

低温粉碎技术与装置

部分应用

部分橡胶玻璃化温度

天然橡胶  -70~-73℃

顺丁橡胶  -102~-108℃

丁基橡胶  -60℃

氯丁橡胶  -40~-42℃

乙丙橡胶  -60℃

硅橡胶    -120~-128℃

部分装置

低温锻炼

金属，苗木，人体等

干冰清洗

低温提取

冷冻离心分离

冷却结晶

低温医疗

冷冻电镜

双语素材

Snow making

Artificial snow is a water spray into which compressed air is added.

In this way, the water is broken up into a fine mist and freezes very rapidly.

Cryogenic refrigeration

Cryogenic temperature are between –273℃ to –157℃.

Many substances are completely different in character at those temperatures.

For example, a steel plate at –212℃, when dropped on the floor, will shatter like glass.

Three methods are used to create these low temperatures:

(1)Expansion process with heat exchangers (Joule-Thompson process).

(2)Expansion process with heat exchangers and with gases performing work.

(3)Multiple cascade system.

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