1. Summary of heat storage technology
With the advancement of equipment and materials, regenerative heat exchanging technology has got revolutionary development and great progress. At present, this technology is widely used for heating furnace and ladle baker in metallurgical enterprises. This article is to introduce the function of heat storage technology for aluminum melting furnace, explaining that regenerative heat exchanging technology has advantages to improve the aluminum quality, speed up the aluminum speed, reduce the discharge of pollutants and save energy consumption, etc. This technology will have wide application prospect in non-ferrous metallurgy industry.
2. Principle of regenerative heat exchanging technology
Regenerative burners exist in pairs, and two opposite burners are a group (group A burner, group B burner). After the normal temperature air from blowers is switched into regenerative burner 1 and 4 by reversing valve, it is heated when passing the ceramic glomerulus in burner 1 and 4, and with a very short time the normal temperature air reaches to furnace temperature (generally 80-90%). When the heated air goes into the furnace, it absorbs the flue gas around to form a rarefied, lean-oxygen and high-temperature airflow with the oxygen content lower than 21%, and at the same time and inject fuels into the high-temperature air to make the fuel burn under lean-oxygen condition.
Meanwhile, the hot gas inside the furnace is emitted into the air through the other two burners, 2 and 3, and the high-temperature gas is stored in the heat retailers of burner 2 and 3, and then discharged through the reversing valve as low- temperature gas which is below 150? . When the heat stored in the heat retailer is saturated, the reversing valve exchange the direction and make the regenerative burners change its situations between heat storage and working, thus save energy and reduce the discharge of NOX, etc.
Regenerative heat exchanging technology has changed the traditional combustion mode; The fuel and air enter into the furnace from different ways with proper speed and mix with the combustion products in the furnace; 21% of the O2 is diluted and the fuels burn at high-temperature (above 1000? ) and oxygen deficient atmosphere (5~6.5%). This combustion mode has brought many advantages.
With remarkable energy-saving effect, saving 30% more than traditional melting furnace
Item combustion
Engine type furnace chamber
Max. Temperature furnace capacity furnace constructure burner QTY Total power
RL-3 burners 1100 3000 straight door&arc top 2 12KW
RL-5 burners 1100 5000 straight door&arc top 2 12KW
RL-8 burners 1100 8000 tilting door&arc top 2 15KW
RL-10 storage 1100 10000 tilting door&arc top 2 36KW
RL-12 storage 1100 12000 tilting door&arc top 2 36KW
RL-15 storage 1100 15000 tilting door&arc top 2 40KW
RL-18 storage 1100 18000 tilting door&arc top 2 40KW
RL-22 storage 1100 22000 tilting door&arc top 2 45KW
RL-25 storage 1100 25000 tilting door& plat top 2 45KW
RL-30 storage 1100 30000 tilting door& plat top 2 60KW
With the advancement of equipment and materials, regenerative heat exchanging technology has got revolutionary development and great progress. At present, this technology is widely used for heating furnace and ladle baker in metallurgical enterprises. This article is to introduce the function of heat storage technology for aluminum melting furnace, explaining that regenerative heat exchanging technology has advantages to improve the aluminum quality, speed up the aluminum speed, reduce the discharge of pollutants and save energy consumption, etc. This technology will have wide application prospect in non-ferrous metallurgy industry.
2. Principle of regenerative heat exchanging technology
Regenerative burners exist in pairs, and two opposite burners are a group (group A burner, group B burner). After the normal temperature air from blowers is switched into regenerative burner 1 and 4 by reversing valve, it is heated when passing the ceramic glomerulus in burner 1 and 4, and with a very short time the normal temperature air reaches to furnace temperature (generally 80-90%). When the heated air goes into the furnace, it absorbs the flue gas around to form a rarefied, lean-oxygen and high-temperature airflow with the oxygen content lower than 21%, and at the same time and inject fuels into the high-temperature air to make the fuel burn under lean-oxygen condition.
Meanwhile, the hot gas inside the furnace is emitted into the air through the other two burners, 2 and 3, and the high-temperature gas is stored in the heat retailers of burner 2 and 3, and then discharged through the reversing valve as low- temperature gas which is below 150? . When the heat stored in the heat retailer is saturated, the reversing valve exchange the direction and make the regenerative burners change its situations between heat storage and working, thus save energy and reduce the discharge of NOX, etc.
Regenerative heat exchanging technology has changed the traditional combustion mode; The fuel and air enter into the furnace from different ways with proper speed and mix with the combustion products in the furnace; 21% of the O2 is diluted and the fuels burn at high-temperature (above 1000? ) and oxygen deficient atmosphere (5~6.5%). This combustion mode has brought many advantages.
With remarkable energy-saving effect, saving 30% more than traditional melting furnace
Item combustion
Engine type furnace chamber
Max. Temperature furnace capacity furnace constructure burner QTY Total power
RL-3 burners 1100 3000 straight door&arc top 2 12KW
RL-5 burners 1100 5000 straight door&arc top 2 12KW
RL-8 burners 1100 8000 tilting door&arc top 2 15KW
RL-10 storage 1100 10000 tilting door&arc top 2 36KW
RL-12 storage 1100 12000 tilting door&arc top 2 36KW
RL-15 storage 1100 15000 tilting door&arc top 2 40KW
RL-18 storage 1100 18000 tilting door&arc top 2 40KW
RL-22 storage 1100 22000 tilting door&arc top 2 45KW
RL-25 storage 1100 25000 tilting door& plat top 2 45KW
RL-30 storage 1100 30000 tilting door& plat top 2 60KW