DEVICE FOR FORMING AIR-GAS SCREEN TO PROTECT PEOPLE AGAINST HAZARDOUS CHEMICAL SUBSTANCES Russian patent published in 2005 - IPC

FIELD: equipment for collective protection of human respiratory organs against hazardous or toxic substances.

SUBSTANCE: device is made as land-based line heat source which generates heat during natural gas combustion, tubular gas collector with perforated upper part and additional channel bordered with the upper part. The additional channel is defined by impermeable side longitudinal partitions and outer perforated walls. Perforated walls of additional channel are concentric and have relative lengths equal to 1/12 - 1/6 of circle perimeter. Number and dimension of perforated orifices in one wall are identical to that in another wall. Axes of perforations of one wall are arranged in staggered order strongly in center of space between corresponding axes of that of another wall. Outer wall of additional channel is continued in circumferential direction symmetrically in both sides and extends beyond side longitudinal partitions for total length equal to 1/2 of cylindrical shell perimeter. The wall has longitudinal perforations located near side longitudinal partitions. Partition width is equal to side longitudinal partition height. Tubular gas collector is located above ground surface and mounted on solid air-tight support.

EFFECT: increased reliability and operational safety during generating heat in amount enough for stable air-gas screen forming.

2 dwg