The heat exchanger head (the element where heat exchange is performed) is assembled out of a set of standard modules with the base of 840х840 mm using bolted or welded joints. The module height varies depending on the required power, air resistance restrictions and dimensions of the mounted equipment.

If the modules located on the most loaded chimney flue segments are partially or completely worn out (for example, due to strong abrasive ability of dusty mediums) you may interchange the most and the least worn modules. For this purpose the modules are disconnected and then they are assembled in any other combination (without dismantling of the whole heat exchanger unit and its transportation to the place of repair). The weight of each module varies within 500-1500 kg depending on its height which simplifies this operation. The modular assembly using welding is the most preferable method. At modules welding the sheet metal bars with 20-25 mm width and 1.5 mm thickness are used as the joints between the modules. At replacement of modules connected in like manner it is enough to cut and reweld the bars. Experience has proven that this method simplifies and speeds up the process of modules disconnection and further assembly compared with flange couplings.

Thus, the modular design increases the service life of the heat exchanger, simplifies its installation and repair and reduces the corresponding costs, increases reliability, etc.

If one of the sections is worn out, it is fully replaced; or the most and the least worn sections are interchanged.




If one of the sections is worn out, it is fully replaced; or the most and the least worn sections are interchanged.

The technologies used at operation of the heat exchanger in gases with severe dust content.

The following changes in the standard design are made if the heat exchanger operates in gases with severe dust content:

  1. Wear-resistant steels are used. The steels increase wearing capacity 3-5 times against standard corrosion-resistant steels and 5-10 times against low-carbon steel used in gas ducts;
  2. The heat exchanger channel section is selected in the way that the flue gas velocity exceeds the channel scouring velocity;
  3. The screens are mounted at gas circuit inlets reducing significantly wear of the heat exchanger butt ends;
  4. The modular design of the heat exchanger improves its maintainability. If one of the sections is worn out, it is fully replaced; or the most and the least worn sections are interchanged. At that it is permissible to leave other heat exchanger sections unchanged if they are operational;
  5. Assembly manholes are mounted in the heat exchanger circuits to provide access to the most loaded sections;
  6. The heat exchanger is mounted on the gas circuit section after partial (or full) gas cleaning.




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