Sublimation device

Abstract

The invention provides a sublimation device. The sublimation device is used for sublimating solid materials and comprises a control unit, a feed bin, a sublimation cavity and a feed injection pipe, wherein the sublimation cavity is provided with a material feeding port and a material sublimation gas outlet; one end of the feed injection pipe communicates with the feed bin, and the other end of thefeed injection pipe communicates with the material feeding port of the sublimation cavity; and a first gas conveying pipe and a second gas conveying pipe are further arranged on the outer side of thefeed injection pipe in a sleeving manner. Compared with the prior art, the invention has the following beneficial effects: the first gas conveying pipe and the second gas conveying pipe are sequentially arranged on the outer side of the feed injection pipe in a sleeving manner, the temperature of gas conveyed in the first gas conveying pipe is lower than the sublimation temperature of a solid material, and the temperature of gas conveyed in the second gas conveying pipe is higher than the sublimation temperature of the solid material, so sublimated material gas cannot be hardened at the periphery of a material conveying channel when meeting cold in ascending process and prevented from blocking a material feeding opening.

Description

technical field [0001] The invention relates to a preparation technology for obtaining gaseous materials or chemical raw materials by using the sublimation characteristics of substances, in particular to a sublimation device. Background technique [0002] Sublimation refers to the process of changing a solid substance directly into a gaseous state without going through a liquid state. Some substances have a relatively high vapor pressure in the solid state. When heated, they can directly change into the gaseous state without going through the liquid state. This process is called the sublimation process. The temperature at which the vapor pressure of a solid substance is equal to the external pressure is called the sublimation point of the substance. The sublimation process can be used to separate sublimable substances from non-sublimable substances, or to separate solid mixtures of different volatilities. If the sublimable substances contain non-volatile impurities, sublima...

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Problems solved by technology

[0003] The existing ordinary sublimator generally includes a sublimation chamber, and a heating element is wrapped outside the sublimation chamber, and a feed port is also provided on the wall of the sublimation chamber, and the feed port is externally connected to a feed injection pipe, and the material is fed from the feed injection pipe and The feed inlet enters the sublimation chamber for sublimation. As the sublimation process progresses, the material will diffuse into the feed inlet and feed injection pipe after being heated and vaporized. Because the temperature of the feed inlet and feed injection pipe is higher than that in the sublimation chamber The temperature is low, so that the sublimated material re-condenses and hardens here, and it is easy to cause blockage of the feed inlet and feed injection pipe, affecting the continuous feeding

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