| 摘要 |
A closed bottom heat exchange tank is provided for containing CO2 snow and the tank includes upstanding and interconnected side wall portions and a top wall extending between and interconnecting the upper marginal edges of the side wall portions. A CO2 snow forming header pipe generally parallels and closely overlies the top wall and is removably anchored thereto by inverted U-shaped clamps secured to the top wall through the utilization of threaded fasteners. One end of the header pipe is open for sealed communication with a liquid CO2 supply line and the other end of the header pipe is closed. A plurality of depending tubular nipples including upper ends shaped to conform to the underside of the header pipe have the upper ends thereof secured to the header pipe at points spaced longitudinally therealong and the lower end portions of the nipples are loosely received downwardly through openings formed in the top wall of the heat exchange tank. The lower portion of the supply line is provided with small diameter jet discharge bores formed therethrough opening into the upper ends of the nipples and the lower ends of the nipples are diametrically enlarged and open downwardly toward the bottom of the tank.
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