CONDENSATE HEAT EXCHANGER HAVING TWO PRIMARY TUBE BANKS AND ONE SECONDARY TUBE BANK Russian patent published in 2011 - IPC F24H1/00 

FIELD: power industry.

SUBSTANCE: there proposed is heat exchanger (versions) containing a pair of primary tube banks enveloping gas or liquid fuel burners and secondary tube bank on which condensation of steam contained in combustion gas leaving primary tube banks takes place. Three of the above tube banks are installed mutually parallel and near each other in gas-tight housing and interconnected with each other. At that, heat exchanger includes the devices providing circulation of water subject to heating, namely cold water, between tube or tubes forming secondary tube bank, and tube or tubes forming primary tube bank. Housing is divided on the level of secondary tube bank by means of partition located both inside and outside the above bank. Partition allows the contact of hot gases leaving one primary tube bank only with semi-cylindrical part of secondary tube bank and passage through the above part, and contact of hot gases leaving the other primary tube bank only with the rest part of the secondary tube bank and passage through the above part. The boiler including the above described heat exchanger and boiler plant including several proposed boilers is also proposed.

EFFECT: increasing power of the plant without changing its mass and dimensional characteristics.

21 cl, 20 dwg