Drying method and apparatus for drying object
AssigneeFUJIFILM Corporation
InventorTakao Taguchi
Life of this patent
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Abstract
A technology can efficiently dry the high-boiling point solvent contained in the object and achieve the space-saving and energy-saving of a drying apparatus. A drying method for drying an object containing a first solvent while conveying the object into a chamber (38), comprises: a first drying step of drying the object up to a drying point in the prestage of the chamber (38); and a second drying step of forming a vapor atmosphere of a second solvent having a lower boiling point than the first solvent in the chamber (38) and drying the object such that the temperature of the object in an inlet port of the chamber (38) is made to be lower by a predetermined temperature difference than the temperature of the vapor atmosphere.
Claims18
A drying method for drying an object containing a first solvent while the object is conveyed,-comprising:
- a first drying step of drying the object up to a drying point;
- and
- a second drying step of forming, in a drying chamber at a post stage of the first drying step, a vapor atmosphere of a second solvent having a lower boiling point than the first solvent and drying the object such that a temperature of the object in an inlet port of the drying chamber is made to be lower by a predetermined temperature difference than a temperature of the vapor atmosphere, wherein
- 0.25≦CR(273.15+T)/(PT×M)<1.0
- is satisfied where a vapor amount of the second solvent is denoted as C [g/m3];
- a temperature of the object is denoted as T [° C.];
- a saturated vapor pressure of the second solvent at T° C. is denoted as PT [Pa];
- the molecular weight of the second solvent is denoted as M;
- and the gas constant is denoted as R (8.31 Pa·m3/(mol·K)).
A drying apparatus for drying an object containing a first solvent while the object is conveyed, comprising:
- a first drying section to dry the object up to a drying point;
- and
- a second drying section to form a vapor atmosphere of a second solvent having a lower boiling point than the first solvent in a drying chamber provided at a post stage of the first drying section and to dry the object such that a temperature of the object in an inlet port of the drying chamber is made to be lower by a predetermined temperature difference than a temperature of the vapor atmosphere, wherein the second drying section comprises:
- a solvent vapor generating device to generate a second solvent having a lower boiling point than the first solvent and to form a vapor atmosphere of the second solvent in the drying chamber;
- a heating device to heat the object in the drying chamber;
- a temperature detecting device to detect a temperature of the vapor atmosphere of the second solvent and a temperature of the object in an inlet port of the drying chamber;
- and
- a controlling device to control the heating device such that the temperature of the object in the inlet port of the drying chamber is lower by a predetermined temperature difference than the temperature of the vapor atmosphere therein, based on the detected results obtained by the temperature detecting device.
A drying method for drying an object containing a first solvent while the object is conveyed, -comprising:
- a first drying step of drying the object up to a drying point;
- and
- a second drying step of forming, in a drying chamber at a post stage of the first drying step, a vapor atmosphere of a second solvent having a lower boiling point than the first solvent and drying the object such that a temperature of the object in an inlet port of the drying chamber is made to be lower by a predetermined temperature difference than a temperature of the vapor atmosphere,
- wherein the temperature difference is in a range of 5° C. to 100° C., wherein
- 0.25≦CR(273.15+T)/(PT×M)<1.0
- is satisfied where a vapor amount of the second solvent is denoted as C [g/m3];
- a temperature of the object is denoted as T [° C.];
- a saturated vapor pressure of the second solvent at T° C. is denoted as PT [Pa];
- the molecular weight of the second solvent is denoted as M;
- and the gas constant is denoted as R (8.31 Pa·m3/(mol·K)).
A drying apparatus for drying an object containing a first solvent while the object is conveyed, comprising:
- a first drying section to dry the object up to a drying point;
- and
- a second drying section to form a vapor atmosphere of a second solvent having a lower boiling point than the first solvent in a drying chamber provided at a post stage of the first drying section and to dry the object such that a temperature of the object in an inlet port of the drying chamber is made to be lower by a predetermined temperature difference than a temperature of the vapor atmosphere, wherein the second drying section comprises:
- a solvent vapor generating device to generate a second solvent having a lower boiling point than the first solvent and to form a vapor atmosphere of the second solvent in the drying chamber;
- a heating device to heat the object in the drying chamber;
- a temperature detecting device to detect a temperature of the vapor atmosphere of the second solvent and a temperature of the object in an inlet port of the drying chamber;
- and
- a controlling device to control the heating device such that the temperature of the object in the inlet port of the drying chamber is lower by a predetermined temperature difference than the temperature of the vapor atmosphere therein, based on the detected results obtained by the temperature detecting device;
- and
- further comprising
- a third drying section to dry by hot air the object at a post stage of the second drying section.
Dependencies are inferred from the claim text.