Filtering apparatus, back wash method therefor, filtering device and power plant
First Claim
Patent Images
1. A filtering apparatus, comprising:
- a vessel adapted for connecting a feed inlet line for introducing feed into the vessel and a filtrate outlet line for letting filtrate out of the vessel;
a filter contained in the vessel for filtering the feed to let filtered feed flow as the filtrate; and
the filter being made of fluororesin to which thermal treatment is added in at least one of gas and liquid beforehand.
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Abstract
A filtering apparatus having a vessel and a filter made from fluororesin and treated before filtering operation by at least one of adding thermal treatment in gas or liquid and penetrating with fluid composed of hot water or steam at a temperature of less than melting point of the fluororesin.
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Citations
25 Claims
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1. A filtering apparatus, comprising:
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a vessel adapted for connecting a feed inlet line for introducing feed into the vessel and a filtrate outlet line for letting filtrate out of the vessel;
a filter contained in the vessel for filtering the feed to let filtered feed flow as the filtrate; and
the filter being made of fluororesin to which thermal treatment is added in at least one of gas and liquid beforehand. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 24)
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9. A filtering apparatus, comprising:
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a vessel adapted for connecting a feed inlet line for introducing feed into the vessel and a filtrate outlet line for letting filtrate flow out of the vessel; and
a filter contained in the vessel for filtering the feed to let filtered feed flow as the filtrate;
the filter being made of fluororesin permeated with permeation fluid composed of at least one of hot water and steam beforehand. - View Dependent Claims (10, 11, 14, 15, 17, 18, 19, 20)
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12. A method of manufacturing a filtering apparatus, comprising:
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making a filter for filtering feed from fluororesin;
adding thermal treatment to the filter by at least one of, heating the filter in at least one of gas and liquid, and penetrating the filter through permeation fluid composed of one of hot water and steam; and
after the adding of thermal treatment to the filter, arranging the filter in a vessel adapted for connecting a feed inlet line for introducing the feed into the vessel and a filtrate outlet line for letting filtrated feed flow as filtrate out of the vessel.
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13. A back wash method for back washing a filtering apparatus composed of a vessel and a filter made from fluororesin to which thermal treatment is added by using at least one of gas and liquid beforehand, the vessel being composed of a first compartment in which the filter is contained to filter feed in a filtering operation and a second compartment positioned above the first compartment to contain filtered feed as filtrate in the filtering operation, the back wash method comprising:
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first back washing the filter composed of, supplying back wash rinse fluid composed of at least one of water, air and steam into the filtering apparatus from the second compartment side of the filtering apparatus, passing the back wash rinse fluid through the filter, and discharging the back wash rinse fluid out of the filtering apparatus; and
second back washing the filter composed of, supplying back wash water into the filtering apparatus from the first compartment side of the filtering apparatus, passing the back wash water through the filter, and discharging the back wash water out of the filtering apparatus from the second compartment side of the filtering apparatus.
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16. A filtering device, comprising:
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a filtering apparatus composed of a vessel with a filtrate accumulation space provided in an upper side thereof and a filter contained in the vessel;
a feed inlet line for introducing feed into the filtering apparatus;
a filtrate outlet line for letting filtrate flow out of the filtering apparatus;
the filter filtering the feed to let filtered feed flow as the filtrate;
a back wash tank for storing back wash water to be supplied into the filtering apparatus, with a partition which easily passes liquid component and hardly passes gas component to separate the back wash tank into a first compartment and a second compartment;
the first compartment being adapted for connecting a gas supply line capable of controlling gas pressure and for supplying the gas to the filtering apparatus, and a make-up water supply line for supplying the back wash water to the filtering apparatus; and
the second compartment being connected to the filtrate accumulation space of the filtering apparatus. - View Dependent Claims (25)
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21. A filtering device, comprising:
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a filtering apparatus composed of a vessel with a filtrate accumulation space provided in an upper side thereof and a filter contained in the vessel;
a feed inlet line for introducing feed into the filtering apparatus;
a filtrate outlet line for letting filtrate flow out of the filtering apparatus;
the filter filtering the feed to let filtered feed flow as the filtrate;
a drain line for discharging fluid in a lower side of the filtering apparatus out of the filtering apparatus from an inlet side of the feed; and
a cooler installed in the drain line for cooing the discharging fluid. - View Dependent Claims (22, 23)
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Specification