Heat exchanger and manufacturing method thereof

Abstract

The invention discloses a heat exchanger, particularly relates to an air heat exchanger, and belongs to the technical field of heat exchanging equipment. The heat exchanger comprises a smoke inflow end and a smoke outflow end, and is characterized in that a protection pipe set is arranged at the smoke inflow end, the area of the protection pipe set accounts for one fourth of the whole heat exchanging area, an air heat exchanger body is arranged at the smoke outflow end, the air heat exchanger body comprises an outlet air bellow, an inlet air bellow, heat exchanging collecting pipes and a lower air bellow, the area of the air heat exchanger body accounts for three fourths of the whole heat exchanging area, a cold air bellow and a hot air bellow of the protection pipe set are made of stainless steel plates, collecting pipes of the protection pipe set are made of stainless steel materials, and aluminizing is carried out on the surfaces of the collecting pipes. The invention further discloses a manufacturing method of the heat exchanger. On the premise of meeting the requirements of users, the heat exchanger can raise the preheating temperature, the service life can be prolonged by one time, and the maintenance cost can be reduced to be one fourth of original maintenance cost. The service life can be prolonged to be about 12 years from original about three years, the economical benefits are remarkable, and the heat exchanger is of great significance on economical operating of a heating furnace.

Description

technical field [0001] The invention relates to a heat exchanger and a manufacturing method thereof, in particular to an air heat exchanger and a manufacturing method thereof, belonging to the technical field of heat exchange equipment. Background technique [0002] In order to meet the needs of energy saving, metallurgical heating furnace heat recovery devices have been widely used, especially the air-gas heat exchanger installed in the flue of the heating furnace has played a great role in energy saving and emission reduction. However, there are still problems in the application process that cannot meet the requirements of users. Since the traditional heat exchanger is designed as a whole, after 3 years of use, the first row of heat exchange tubes will be oxidized and burned, resulting in air leakage, which needs to be replaced, and the maintenance cost is very high. How to reduce the maintenance cost of the heat exchanger and improve the service life of the heat exchange...

AI Technical Summary

Problems solved by technology

However, there are still problems in the application process that cannot meet the requirements of users.

Because the traditional heat exchanger is designed as a whole, after 3 years of use, the first row of heat exchange tubes will be oxidized and burned, and air leakage will occur, which needs to be replaced, and the maintenance cost is very high

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