| 摘要 |
<p>The invention relates to structural designs for contact devices used for carrying out mass-transfer in a gas (vapour)-fluid system in a cyclic mode and can be used in the food, chemical, petrochemical, oil-refining and other industries. The inventive mass-transfer device comprises a plate curtain, a contact bubble unit provided with holes, a shell provided with holes embodied along the perimeter thereof and an additional plate curtain. The shell is provided with a movable two-way valve which is arranged therein and consists of top and low plates interconnected by a spacing post. The folded top edge of the contact bubble unit is used in the form of a lift limiter for the valve, wherein the top plate of the valve is positioned in such a way that it is able to close the hole of the contact bubble unit for enabling vapour to pass under the top plate through the holes of said contact bubble unit. Said invention makes it possible to extend the operating range of vapour loads, to reduce the metal consumption and the height of the mass-transfer device and to increase the reliability and service life thereof.</p> |
