Hood and method for generating carbon dioxide snow
阅读：564发布：2022-10-24
专利汇可以提供Hood and method for generating carbon dioxide snow专利检索，专利查询，专利分析的服务。并且An apparatus and method are provided wherein carbon dioxide gas, separated by centrifugal force from dry ice, is discharged up a stack at a velocity such that it aspirates CO2 vapor from a snow hood, including that developed by a conventional snow horn, and exhausts it from the area.，下面是Hood and method for generating carbon dioxide snow专利的具体信息内容。
1. Apparatus for generating carbon dioxide snow with a reduced carbon dioxide vapor content comprising a hood open on the bottom and having an enclosing side wall and top, substantially vertical vent means having its inlet in said top, a horn to convert liquid carbon dioxide into carbon dioxide snow and carbon dioxide vapor within the hood said horn being adjacent said vent, and jet means for directing a high velocity stream of carbon dioxide vapor up said vent at said inlet.
2. Apparatus according to claim 1 wherein the jet means comprises means to generate snow from liquid CO2 and to separate the CO2 vapor as a high velocity stream.
3. Apparatus according to claim 1 including a stack connected to said vent, suction means in said stack and damper means in said vent.
4. Apparatus according to claim 1 wherein the jet discharge is adjacent said inlet to said vent.
5. Apparatus according to claim 1 including a damper adjacent said inlet of said vent.
6. Apparatus according to claim 2 wherein the jet means comprises a bent tube wherein the snow and gas are separated by centrifugal force.
7. The method of converting liquid CO2 into dry ice snow and disposiNg of the resulting CO2 vapor comprising the steps of converting at a first location a stream of liquid CO2 into dry ice snow having a low velocity, separating the snow from the vapor substantially by gravity, converting a second stream of liquid CO2 into vapor and snow at a second location adjacent said first location, discharging the vapor from said second stream into a vent adjacent said first location at a velocity sufficient to aspirate the vapor from the first location into the vent.
8. Method according to claim 7 wherein the low velocity snow is delivered in a downward direction.
9. The method of claim 7 including the step of modulating the flow of CO2 vapor through the vent by admitting air to the vent adjacent the discharge of vapor from said second location.
10. The method of claim 7 including the step of applying suction to a stack connected to said vent whereby discharge of vapor in the stack is continued upon interruption of vapor discharge from said second location.
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