PIPE FREEZER

PROBLEM TO BE SOLVED: To prevent the air pollution caused by dry ice, by cooling a heat exchanger with a freezer, and circulating a brine, which has come to a low temperature with the heat exchanger, to a cold head with a liquid pump, and freezing the fluid within a pipe by temperature drop of the c...

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Bibliographic Details
Main Author SUDO TADASHI
Format Patent
LanguageEnglish
Published 27.08.1999
Edition6
Subjects
BLASTING
COLD ROOMS
COMBINED HEATING AND REFRIGERATION SYSTEMS
COOLING OR FREEZING APPARATUS NOT COVERED BY ANY OTHERSUBCLASS
HEAT PUMP SYSTEMS
HEATING
ICE-BOXES
LIGHTING
LIQUEFACTION SOLIDIFICATION OF GASES
MANUFACTURE OR STORAGE OF ICE
MECHANICAL ENGINEERING
REFRIGERATION OR COOLING
REFRIGERATORS
WEAPONS
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Summary:PROBLEM TO BE SOLVED: To prevent the air pollution caused by dry ice, by cooling a heat exchanger with a freezer, and circulating a brine, which has come to a low temperature with the heat exchanger, to a cold head with a liquid pump, and freezing the fluid within a pipe by temperature drop of the cold head. SOLUTION: A freezer 1 is driven to cool a heat exchanger 2, and brine is cooled by the heat exchanger 2. Subsequently, the cooled brine is circulated to a cold head 5 by rotating a liquid pump 3, and the fluid within the pipe 4 is frozen by the temperature drop of the cold head 5. At this time, temperature sensors T1 and T2 are provided on the cold head side 5 of valves 13 and 14 so that the pipe 4 may not enter a low-temperature fragility region so as to control the temperature. Then, the power source of the freezer 2 and a hydraulic pump 3 is turned off, and an air pump 16 is rotated to apply pressure to the inside of the cold head 5, and the brine within the cold head 5 is recovered into a tank 6.
Bibliography:Application Number: JP19980074776