US4543188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing foreign matters from condenser cooling water
Assignee: Hitachi Ltd
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Filing: 1983-11-03
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Granted: 1985-09-24
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Expires: 2003-11-03
Abstract
Abstract A foreign matter removing apparatus for removing foreign matters from cooling water such as sea water taken as the cooling water for the condenser of, for example, a power generating plant. The apparatus has an inversed frusto-conical barrel, a filter of a substantially same form as the barrel and disposed in the latter, a cooling water inlet pipe connected to a side portion of the barrel, a cooling water outlet pipe connected to an upper portion of the barrel, a foreign matter discharge pipe connected to a lower side portion of the barrel, and a butterfly valve disposed in the cooling water inlet at which the cooling water inlet pipe is connected to the barrel. The foreign matter discharge pipe is periodically opened while varying the opening degree or angular position of the butterfly valve thereby to remove and discharge foreign matters from the filter surface. The filter is provided at an upper portion thereof with a cover plate or, alternatively, non-perforated portion which effectively enhances the foreign matter removing ratio while eliminating the clogging of the filter and reducing the pressure drop.
Inventors
- 👤 Isao Okouchi
- 👤 Sankichi Takahashi
- 👤 Kenkichi Izumi
- 👤 Masahiko Miyai
- 👤 Katsumoto Otake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:52
CPC Classifications
F; F28; F28G; F28G1/00; F28G1/12; B; B01; B01D; B01D21/00; B01D21/0012; B01D21/26; B01D21/267; B01D21/30; B01D21/34; B01D29/00; B01D29/11; B01D29/114; B01D29/88; B01D29/90; B01D29/902; B01D29/908; B01D29/94; B01D29/945; B01D2201/00; B01D2201/02; B01D2201/28; B01D2201/287
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
125 words
A foreign matter removing apparatus for a condenser cooling water comprising: a generally cylindrical barrel, a filter mounted in said barrel, said filter having an upper and lower portion, an unfiltered cooling water inlet pipe connected to a side portion of said barrel, a filtered cooling water outlet pipe connected to an upper portion of said barrel, a foreign matter discharge pipe connected to a side portion of said barrel, a butterfly valve disposed in said unfiltered cooling water inlet pipe for adjusting the flow of water into said barrel to either directly flow into said barrel for filtering or to tangentially flow into said barrel for filter cleaning, and flow blocking means on an upper portion of said filter opposite said cooling water inlet.
Claim 2
Dependent Claim
125 words
A foreign matter removing apparatus for a condenser cooling water comprising: a generally cylindrical barrel, a filter mounted in said barrel, said filter having an upper and lower portion, an unfiltered cooling water inlet pipe connected to a side portion of said barrel, a filtered cooling water outlet pipe connected to an upper portion of said barrel, a foreign matter discharge pipe connected to a side portion of said barrel, a butterfly valve disposed in said unfiltered cooling water inlet pipe for adjusting the flow of water into said barrel to either directly flow into said barrel for filtering or to tangentially flow into said barrel for filter cleaning, and flow blocking means on an upper portion of said filter opposite said cooling water inlet.
Claim 3
Dependent Claim
21 words
A foreign matter removing apparatus according to claim 1, wherein said flow blocking means comprises a non-perforated portion of said filter.
Claim 4
Dependent Claim
18 words
A foreign matter removing apparatus according to claim 1, wherein said flow blocking means comprises a cover plate.
Claim 5
Dependent Claim
40 words
A foreign matter removing apparatus according to claim 1, wherein said flow blocking means is provided by said filter which is provided at its upper portion with a plurality of flow blocking portions equally spaced around the entire periphery thereof.
Claim 6
Dependent Claim
178 words
A foreign matter removing apparatus for condenser cooling water comprising: an inverted frusto-conical barrel, a filter mounted in said barrel and having a form substantially the same as that of said barrel and further having an upper and lower portion, an unfiltered cooling water inlet pipe connected to a side portion of said barrel, a filtered cooling water outlet pipe connected to an upper portion of said barrel, a foreign matter discharge pipe connected to a side portion of said barrel, a butterfly valve disposed in said unfiltered cooling water inlet pipe for adjusting the flow of water into said barrel to either directly flow into said barrel for filtering or to tangentially flow into an annular passage between the inner peripheral surface of said barrel and the outer peripheral surface of said filter to form a downward spiral flow which separates foreign matters from the outer peripheral surface of said filter and discharges the same from said foreign matter discharge pipe, and flow blocking means on an upper portion of said filter opposite said cooling water inlet.
Claim 7
Dependent Claim
178 words
A foreign matter removing apparatus for condenser cooling water comprising: an inverted frusto-conical barrel, a filter mounted in said barrel and having a form substantially the same as that of said barrel and further having an upper and lower portion, an unfiltered cooling water inlet pipe connected to a side portion of said barrel, a filtered cooling water outlet pipe connected to an upper portion of said barrel, a foreign matter discharge pipe connected to a side portion of said barrel, a butterfly valve disposed in said unfiltered cooling water inlet pipe for adjusting the flow of water into said barrel to either directly flow into said barrel for filtering or to tangentially flow into an annular passage between the inner peripheral surface of said barrel and the outer peripheral surface of said filter to form a downward spiral flow which separates foreign matters from the outer peripheral surface of said filter and discharges the same from said foreign matter discharge pipe, and flow blocking means on an upper portion of said filter opposite said cooling water inlet.
Claim 8
Dependent Claim
21 words
A foreign matter removing apparatus according to claim 5, wherein said flow blocking means comprises a non-perforated portion of said filter.
Claim 9
Dependent Claim
18 words
A foreign matter removing apparatus according to claim 5, wherein said flow blocking means comprises a cover plate.
Claim 10
Dependent Claim
40 words
A foreign matter removing apparatus according to claim 5, wherein said flow blocking means is provided by said filter which is provided at its upper portion with a plurality of flow blocking portions equally spaced around the entire periphery thereof.
Claim 11
Dependent Claim
131 words
A foreign matter removing apparatus for a condensor cooling water comprising: a generally cylindrical barrel, a filter mounted in said barrel, said filter having an upper and lower portion, an unfiltered cooling water inlet pipe connected to a lower side portion of said barrel, a filtered cooling water outlet pipe connected to an upper portion of said barrel, a foreign matter discharge pipe connected to an upper side portion of said barrel opposite said inlet, a butterfly valve disposed in said unfiltered cooling water inlet pipe for adjusting the flow of water into said barrel to either directly flow into said barrel for filtering or to tangentially flow into said barrel for filter cleaning, and flow blocking means opposite said discharge pipe only on an upper side portion of said filter.
Claim 12
Dependent Claim
131 words
A foreign matter removing apparatus for a condensor cooling water comprising: a generally cylindrical barrel, a filter mounted in said barrel, said filter having an upper and lower portion, an unfiltered cooling water inlet pipe connected to a lower side portion of said barrel, a filtered cooling water outlet pipe connected to an upper portion of said barrel, a foreign matter discharge pipe connected to an upper side portion of said barrel opposite said inlet, a butterfly valve disposed in said unfiltered cooling water inlet pipe for adjusting the flow of water into said barrel to either directly flow into said barrel for filtering or to tangentially flow into said barrel for filter cleaning, and flow blocking means opposite said discharge pipe only on an upper side portion of said filter.
Claim 13
Dependent Claim
21 words
A foreign matter removing apparatus according to claim 9, wherein said flow blocking means comprises a non-perforated portion of said filter.
Claim 14
Dependent Claim
18 words
A foreign matter removing apparatus according to claim 9, wherein said flow blocking means comprises a cover plate.
Claim 15
Dependent Claim
40 words
A foreign matter removing apparatus according to claim 9, wherein said flow blocking means is provided by said filter which is provided at its upper portion with a plurality of flow blocking portions equally spaced around the entire periphery thereof.
References Cited (Backward Citations)
US3174622A
Cited
US3724669A
Cited
US3789992A
Cited
US3823831A
Cited
US3828930A
Cited
US3875063A
Cited
US4108778A
Cited
US4276171A
Cited
US4305822A
Cited
US4311591A
Cited
US4366056A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |