Abrégé

A waste heat recycling apparatus of double-layered steel strip heat treatment system is disclosed, which includes first and second heat-treatment lines, wherein first steel strip (1) in first heat-treatment line and second steel strip (2) in second heat-treatment line move in opposite directions, first waste recycling furnace (5) is arranged between first coiling wheel (3) and first tempering furnace (7) in first heat-treatment line, as well as between second uncoiling wheel (4) and second heating furnace (8) in second heat-treatment line, corresponding to first steel strip (1) and second steel strip (2); second waste recycling furnace (14) is arranged between first heating furnace (12) and first uncoiling wheel (16) in first heat-treatment line, as well as between second tempering furnace (13) and second coiling wheel (17) in second heat-treatment line, corresponding to first steel strip (1) and second steel strip (2). More than 90% of waste heat can be used to pre-heat steel strip to reduce the energy for heating steel strip, so that energy is saved and production cost are reduced.

Classes IPC  ?

• C21D 9/56 - Fours continus pour bandes ou fils métalliques
• F27B 19/04 - Combinaisons de différents genres de fours qui ne sont pas tous couverts par un seul des groupes principaux disposés pour un travail conjugué

Abrégé

A steel strip heat-treating system with waste heat utilizing apparatus is disclosed, which includes an uncoiling wheel (3), a coiling wheel (2), and a steel strip (1) disposed between the uncoiling wheel (3) and the coiling wheel (2). A heating furnace (6) and a tempering furnace (11) are disposed in sequence corresponding to the steel strip (1) between the uncoiling wheel (3) and the coiling wheel (2). The heating furnace (6) and tempering furnace (11) are arranged in parallel in upright direction. The rear end of the heating furnace (6) is provided with first quenching device (7), and the front end of the tempering furnace (11) is provided with second quenching device (10). A guiding tank (9) is disposed between first quenching device (7) and second quenching device (10). A waste heat utilizing apparatus (4) is mounted between front end of the heating furnace (6) and the rear end of the tempering furnace (11). The steel strip (1) of parallel structure is arranged in the waste heat utilizing apparatus (4). The waste heat of the steel strip can be utilized reasonably, hence energy waste and production cost are reduced.

Classes IPC  ?

• C21D 9/56 - Fours continus pour bandes ou fils métalliques
• F27B 19/04 - Combinaisons de différents genres de fours qui ne sont pas tous couverts par un seul des groupes principaux disposés pour un travail conjugué