Method for collecting reversely subliming substance and apparatus therefor
AssigneeNippon Shokubai Co., Ltd.
InventorsTsukasa Takahashi, Shigetaka Takamiya, Kenji Nakahara
Life of this patent
Estimating the term…
Abstract
A reversely subliming substance is efficiently collected on a commercial scale from a gas containing the substance. This is achieved by introducing the gas containing the substance into a shell-and-tube collecting apparatus by controlling the resistance offered to the gas during the passage thereof through the cooled tubes retained inside the collecting apparatus or by utilizing gas-introducing tubes excelling in dispersibility.
Claims18
A method for collecting a reversely subliming substance from a gas containing the substance, which comprising:
- preparing a shell-and-tube collecting apparatus capable of performing adhesion and collection of the substance on the inside surfaces of cooled collection tubes, the collection tubes being fixed with tube sheets to the apparatus so as to arrange in parallel with in the apparatus;
- adjusting a pressure loss at which the gas passing through the collection tubes in the range of 0.05 to 50,000 Pa;
- and
- introducing the gas into said apparatus.
A method for collecting a reversely subliming substance from a gas containing the substance, which comprising:
- preparing a shell-and-tube collecting apparatus capable of performing adhesion and collection of the substance on the inside surfaces of cooled collection tubes, the collection tubes being fixed with tube sheets to the apparatus so as to arrange in parallel with in the apparatus;
- arranging an empty space under the lower part of cooled collection tubes;
- and
- introducing the gas into the empty space by adopting at least one of the following means:
- (1) a gas-introducing tube with a perforated plate at the outlet part thereof,
- (2) a gas-introducing tube the outlet direction of which has an angle larger than 90° relative to the directions in which the gas passes through the collection tubes, and
- (3) two or more gas-introducing tubes.
A shell-and-tube collecting apparatus capable of adhering and collecting a reversely subliming substance from a gas containing the substance, which comprising:
- plural of collection tubes cooled with a refrigerant on the inside surfaces of which the substance being adhered and collected and disposed in the apparatus by means of tube sheets;
- and
- baffle plates disposed on the outlet parts of said collection tubes for controlling a pressure loss of the gas passing through said collection tubes.
Dependencies are inferred from the claim text.