Convection Recuperators
Tubular heat exchangers that utilize convection heat transfer to preheat combustion air or gas for saving fuel.
Convection recuperators are comprised of tube bundles with the tubes welded to the tube sheets to assure gas tightness. 管安排, tube material 和 flow pattern are based on the specifics of each individual application, including temperatures, 作文, pressure drop limits 和 space availability.
在一个典型的设计中, the hot waste gas from the furnace flows horizontally through the recuperator, passing outside of vertical tubes. Combustion air en route to the burners makes two or more passes inside the tubes in a counter cross-flow pattern.
应用程序:
- 钢均热炉
- Steel reheat furnaces
- Steel heat treat furnaces
- Steel anneal 和 pickle lines
- Steel galvanizing lines
- Direct reduced iron furnaces
- Aluminum melting furnaces
- Aluminum de-lacquering systems
- Aluminum heat treat furnaces
- Ceramic 和 refractory kilns
- 热氧化剂
- 垃圾焚化炉
关键好处:
By recovering heat from the hot waste gas exiting a furnace 和 transferring it to the combustion air feeding the burners, fuel usage can be reduced by an average of twenty-five percent (25%), 在很多情况下, greater savings are realized. Waste gas temperatures entering convection recuperators are usually in the 1500°F to 2000°F range, 和 combustion air preheat temperatures are usually in the 800°F to 1200°F range.
For high temperature industrial furnaces, such as steel reheat furnaces, recuperators are valuable tools for increasing furnace efficiency. Up to sixty percent (60%) of the available energy in the fuel may be carried out of the furnace in the waste gas, 因此, heat recovery is essential for fuel conservation 和 economical operation. With fuel costs rising, recuperation is certain to play a vital role in the future.
