TUBULAR HEAT-EXCHANGER

FIELD: heat transfer equipment, particularly used in furnaces characterized by descending combustion product movement, namely in power installations such as exhaust gas heat utilizing devices. ^ SUBSTANCE: heat-exchanger comprises heat-exchanging pipe bundle provided with hexahedral connection parts formed at pipe ends and defining tube and annular spaces. The heat-exchanger has annular shape in top view and has inner window adapted to convey solid particles, namely combustion products. Connection parts of the pipes are welded with each other. Annular spaces defined around the pipes are closed with separate plates made as elongated hexahedrons tangentially adjoining paired pipes and welded with each other. One heat-exchanging pipe is removed from both heat-exchanger sides relatively vertical axis thereof. Inlet and outlet connection pipes communicated with annular space for heat transfer agent receiving are welded to free hexahedral cells formed after heat-exchanging pipes removal. Cells from opposite sides of connection pipes are closed with caps. ^ EFFECT: increased heat-exchanger strength and heat-transfer efficiency, elimination of complicated structural units, possibility to adapt heat-exchanger for burners characterized by descending combustion product movement. ^ 3 dwg