DRAFT DEVICE FOR TRANSPORTATION OF CHEMICALLY AGGRESSIVE AND HIGH-TEMPERATURE NONEXPLOSIVE GAS MEDIA Russian patent published in 2008 - IPC F23L5/00 F27D7/04 

FIELD: metallurgy and machine building enterprises.

SUBSTANCE: invention can be used in gas cleaning plants of pickling shops and for circulating gas medium in metal heat treatment furnaces. Proposed device has scroll housing, intake branch pipe, working wheel with blades connected with wheel main disk at one side and with ring at other side. Part of blades is provided with additional blades, weld seams of working wheel are brought out of the limits of its flow portion and are blown by clean air sucked in from surrounding space inside device owing to rarefaction built by rotating additional blades. If proposed device is used for transfer of high-temperature gas medium in thermal furnaces, blowing out of outer surfaces of working wheel with cold ambient air reduced temperature of side surfaces of working wheel by scores of degrees which increases mechanical strength of wheel even at temperature rise of handled gas medium.

EFFECT: increased reliability, and service life of working wheel and mechanical strength of device.

2 cl, 4 dwg