PURPOSE: To obtain a melting furnace for refuse, for which costly oxygen is not used, by providing an oxygen enriching device, equipped with an oxygen preferentially transmissive film, to a combustion-air feeding passage to feed the combustion air to a high-temperature furnace bed.
CONSTITUTION: A combustion-air feeding passage 15, communicatedly connected to the mouth ring of a fan, is provided to a high-temperature furnace bed 2, which is provided with a fan 14 of which air flow rate is adjustable, in the state that the passage 15 passes through a heat exchanger 12 on its feeding and returning routes. An oxygen enriching device 16, equipped with an oxygen preferentially transmissive film, is provided to the part of a combustion-air feeding passage 15 which is on the way to reach the heat exchanger 12 again, after the passage once passing through the heat exchanger 12. The oxygen concentration in combustion air can be enriched by the oxygen enriching device 16. With such a device being provided, a melting furnace of high operability, which is economically advantageous, since costly oxygen is not used, can be used safely, as an oxygen cylinder involving explosive and dangerous nature is not used, besides, a skilled operator to handle an apparatus to enrich oxygen and any legal regulation is not at all necessary, can be obtained.
SASAKI SHIYOUJIROU
ISHIMARU KIMIO
| JPS5438672A | 1979-03-23 | |||
| JPS491077A | 1974-01-08 |