Abstract: A continuous, desublimination apparatus capable of operating at high flow rates. The apparatus works on the principle of reducing temperature of a vapor-gas mixture below the desublimination point. It has a heated jacket with inlets and outlets of gases in which a gas permeable wall is coaxially spaced. Said wall encloses a desublimination space with nozzles for atomizing an evaporable liquid and with a distributor of a vapor-gas mixture at the inlet. The space between said gas permeable wall and the inner jacket wall is divided into at least three vertically aligned sections, the volumes of which increase in the direction away from said inlet of the vapor-gas mixture. In operation, a vapor-gas mixture is cooled below the desublimination point by an atomized liquid. Simultaneous blowing of a secondary gas through said gas permeable wall protects the wall of said desublimination space from solid deposits.