SHELL-AND-TUBE HEAT EXCHANGERS IN PROCESSES OF HYDROCARBON DEGRADATION C-C (VERSIONS) Russian patent published in 2018 - IPC F28D7/16 C07C5/333 

FIELD: chemistry.

SUBSTANCE: invention relates to the shell-and-tube countercurrent heat exchanger to heat the raw vapours in the processes of dehydrogenation of paraffin hydrocarbons C₃-C₅ by the heat of contact gas coming from the dehydrogenation reactor comprising a vertical cylindrical casing (₁ ), a bundle of the heat exchanging tubes (2) with an upper (4) and a lower (3) tube gratings, a nozzle (5) and a distributing chamber (6) to input the contact gas in the upper part of the tube space (2) of the heat exchanger (11), a collecting chamber (7) and a nozzle (8) to output the chilled contact of gas from the lower part of the tube space, as well as nozzles (9) to input vapours of the raw material in the annular space of the heat exchanger (11), divided into sections by transverse horizontal partitions of the segment type (13), and to output (10) the heated vapours of raw materials from it. The heat exchanger is also characterized by the fact that the heat exchanger (11) contains connections (12) to supply a part of the feed raw material in a liquid form for the heat exchanger (11) into the intertube space of the bundle of the heat exchange tubes (2) and/or into the intertube space of the bundle of the heat exchange tubes (2) divided by sectors (17), which are limited to the upper (4) and lower (3) tube gratings and vertical channels (18) between the sectors (17). A version of a shell-and-tube heat exchanger for cooling the contact gas is also proposed.

EFFECT: increase in capacity of dehydrogenation plants of hydrocarbons C₃-C₅ and reducing the costs in production.

22 cl, 6 dwg, 8 ex, 2 tbl