ES424112A1 - Apparatus for the recovery of sublimation products from reaction gases - Google Patents

Abstract

Improvements in sublimators to obtain sublimation products, especially phthalic acid anhydride, from reaction gases, which consist of a closed casing for the reception or conduction through the reaction gas and several rows of tubes provided with fins mounted there superimposed in an approximately horizontal position inside which a heating medium or a cooling medium circulates alternately and in which the reaction gas is conducted inside the casing in a crossed direction with respect to the flow of heating medium or cooling pipes inside the tubes, the fin tubes of each row having been joined, arranged in each case superimposed, alternately with one of their ends in the form of a hairpin by an elbow bend and endowing themselves at the opposite ends with the means of connection for feeding or evacuating the heating or cooling medium and in which the tubes or rows of superimposed tubes, are supported in a limitedly movable way and spaced from each other to allow different thermal expansions, characterized in that at least in both end zones of each fin tube -with arrangement or distribution equal to each other with respect to the totality of the tubes - slip shoes are attached that surround the fin tube in a box-shaped shape, but are perforated in the form of a cage, whereby the fin tubes, adjacent in height to each other, rest loose on each other, resting the Skate shoes, stacked directly one on top of the other, of the different fin tubes of all the tube rows or of groups of tube rows also loosely on support beams, in each case common, anchored in the casing. (Machine-translation by Google Translate, not legally binding)