Esterification reaction tower for producing glyceryl triacetate

Abstract

The invention discloses an esterification reaction tower for glyceryl triacetate production. The esterification reaction tower comprises a tower body, a reboiler, a gas distribution plate, a first condenser, a pervaporation membrane separator, a second condenser, a buffer tank, a reflux channel, a gear rack mechanism, a mesh cylinder and a gear motor. According to the invention, water generated bya reaction and a gas-phase azeotrope of a water-carrying agent are rapidly and efficiently dehydrated at the tower top, the removed water is intensively recycled in the buffer tank, and the recycledwater-carrying agent can be sent back to the tower as required and can also be discharged, so that the use is flexible; active carbon in a catalyst in a material can be directly intercepted in the mesh cylinder, so that the filtering difficulty of subsequent procedures is reduced; the mesh cylinder can reciprocate up and down in the tower and continuously rotate, so that the effect of stirring feed liquid is achieved, and the active carbon is dispersed so as to facilitate the reaction; and the feeding door of the mesh cylinder is matched with the reset spring, the upper pressing head and the lower pressing head, so that the functions of automatic feeding, cleaning and discharging can be achieved, and the esterification reaction tower has the advantages of being convenient to operate and maintain.

Description

technical field [0001] The invention belongs to the technical field of chemical production equipment, and in particular relates to an esterification reaction tower for triacetin production. Background technique [0002] When triacetin is synthesized, glycerol and acetic acid can be used as raw materials for esterification reaction. In order to facilitate the reaction, it is usually necessary to add water-carrying agent and catalyst. The catalyst can use concentrated sulfuric acid-activated carbon catalyst. This catalyst is concentrated Sulfuric acid and activated carbon are stirred and mixed according to a certain mass ratio, raised to a certain temperature, cooled and left for a certain period of time. After the above-mentioned raw materials are pre-reacted in the esterification reaction kettle, the materials are sent into the esterification reaction tower to continue the esterification reaction, and the azeotrope with water agent and water is discharged from the top of the...

AI Technical Summary

Problems solved by technology

[0005] Beneficial effects of the present invention: the present invention quickly and efficiently dehydrates the water generated by the reaction and the gas phase azeotrope with water agent at the top of the tower, which solves the problem of long recovery waiting time in traditional recovery equipment, and the removed water is concentrated and recovered in the buffer tank In the middle, the recovered water-carrying agent can be sent back to the tower according to needs, and can also be discharged, which is flexible to use; the slow flow plate in the return channel prevents the water-carrying agent from returning to the tower body from splashing larger droplets, and keeps the liquid The surface is stable, which is conducive to the normal stratification in the later stage of the reaction; when feeding, the invention can directly trap the activated carbon in the catalyst in the material in the mesh cylinder, which reduces the difficulty of filtering in the subsequent process, and at the same time, the mesh cylinder can move up and down in the tower, and Continuous rotation, on the one hand, it plays the role of stirring the material liquid, on the other hand, it disperses the activated carbon, which is beneficial to the reaction, increases the reaction rate, and shortens the reaction time; It can realize the functions of automatic feeding, cleaning and discharging, and has the advantages of convenient operation and maintenance

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