US3871444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water quality analysis system with multicircuit single shell heat exchanger
Assignee: Rosemount Inc
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Filing: 1971-08-02
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Granted: 1975-03-18
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Expires: 1991-08-02
Abstract
Abstract A modular water quality analysis system for steam electric power generating plants is disclosed which includes a novel single shell multicircuit heat exchanger having means to individually vary the rate of flow of cooling water through each of the multiple circuits therein so that the single heat exchanger can simultaneously cool a plurality of samples entering it at widely differing high inlet temperatures to the same lower range of outlet temperatures. The heat exchanger has a physical construction such that it can be mounted on top of the system rack which contains a plurality of modules of apparatus for accepting water or steam samples from various test points in the power generating system, reducing the pressure and temperature thereof, directing and metering the flow of samples, and performing analyses for such water characteristic as pH, specific or cation conductivity, dissolved oxygen, sodium content and the like. The fact that the single shell heat exchanger can be mounted on top of the system rack and thereby replace a plurality of individually manifolded and valved heat exchangers formerly mounted at the back of the rack makes possible a considerable saving in cost, space and weight, a greater flexibility in system layout design, together with greatly improved access to the system components for adjustment and maintenance purposes, and faster instrument response due to shorter sample tubing runs. This flexibility of design in the modular system also permits the same basic apparatus to be adapted to a large variety of different sizes and types of power generating plants having different analysis requirements thereby providing a custom installation for each plant which nonetheless retains all of the advantages of standardized design and equipment.
Inventors
- 👤 Edwin A Houser
- 👤 Bernell W Schwindt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:37
CPC Classifications
F; F01; F01K; F01K21/00; F01K21/06; F22; F22D; F22D11/00; F22D11/006; F28; F28D; F28D7/00; F28D7/0066; F28D7/0083; F28D7/02; F28D7/024; F28F; F28F27/00; G; G01; G01N; G01N25/00; G01N25/20; G01N25/22; G01N25/40; Y; Y10; Y10S; Y10S165/00; Y10S165/092; Y10S165/101; Y10S165/104
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
349 words
A single closed shell multicircuit heat exchanger wherein each of said separate heat exchange circuits affords an individually adjustable rate of flow of coolant for a sample to be cooled therein, said heat exchanger comprising; a. an elongated heat exchanger shell, said shell having a first closure plate at a first end thereof and a second closure plate positioned inwardly from the second end thereof; b. a first plenum chamber detachably mounted on said first end of said heat exchanger shell, said first plenum chamber having cooling water inlet means connected thereto; c. an end plate detachably connected to said shell at said second end thereof to form with said second closure plate a second plenum chamber in said second end of said shell, said second plenum chamber having cooling water outlet means connected thereto; d. a plurality of apertures in each of said closure plates; e. a plurality of hollow cylindrical baffle spools extending between said closure plates inside said heat exchanger shell and detachably secured to said first and second closure plates, each spool surrounding one aperture in each of said plates so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; f. means on said end plate to detachably mount a plurality of coils of sample tubing, each coil extending into one of said spools, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith and both extending out of its associated spool, through said second plenum chamber and said end plate and out of said heat exchanger; g. each of said coils being separately and individually removable from said heat exchanger by removing said first plenum chamber and said heat exchanger shell from said end plate, sliding said spool off of the coil to be removed, and disconnecting said coil from said end plate; and h. separate means operatively associated with each of said spools to regulate the rate of flow of cooling water through that individual spool independently of the rate of flow of cooling water through any other spool.
Claim 2
Dependent Claim
349 words
A single closed shell multicircuit heat exchanger wherein each of said separate heat exchange circuits affords an individually adjustable rate of flow of coolant for a sample to be cooled therein, said heat exchanger comprising; a. an elongated heat exchanger shell, said shell having a first closure plate at a first end thereof and a second closure plate positioned inwardly from the second end thereof; b. a first plenum chamber detachably mounted on said first end of said heat exchanger shell, said first plenum chamber having cooling water inlet means connected thereto; c. an end plate detachably connected to said shell at said second end thereof to form with said second closure plate a second plenum chamber in said second end of said shell, said second plenum chamber having cooling water outlet means connected thereto; d. a plurality of apertures in each of said closure plates; e. a plurality of hollow cylindrical baffle spools extending between said closure plates inside said heat exchanger shell and detachably secured to said first and second closure plates, each spool surrounding one aperture in each of said plates so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; f. means on said end plate to detachably mount a plurality of coils of sample tubing, each coil extending into one of said spools, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith and both extending out of its associated spool, through said second plenum chamber and said end plate and out of said heat exchanger; g. each of said coils being separately and individually removable from said heat exchanger by removing said first plenum chamber and said heat exchanger shell from said end plate, sliding said spool off of the coil to be removed, and disconnecting said coil from said end plate; and h. separate means operatively associated with each of said spools to regulate the rate of flow of cooling water through that individual spool independently of the rate of flow of cooling water through any other spool.
Claim 3
Dependent Claim
229 words
A liquid sample single shell multicircuit heat exchanger wherein each heat exchange circuit has an independently adjustable rate of flow of coolant comprising; a. a heat exchanger shell; b. a first plenum chamber at one end of said shell having liquid coolant inlet tube means connected thereto; c. a second plenum chamber at the other end of said shell having liquid coolant outlet tube means connected thereto; d. a plurality of hollow cylindrical baffle spools positioned inside said heat exchanger shell and extending between said first and second plenum chambers, each of said spools communicating with both of said plenum chambers so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; e. a coil of tubing for a liquid sample to be cooled positioned in each of said spools, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith and both extending out of one end only of said spool and thence through one of said plenum chambers and out of one end of said heat exchanger, whereby the liquid sample tubing is surrounded by the coolant in heat conducting relation thereto; and f. separate means operatively associated with each of said spools to regulate the flow of coolant through that individual spool independently of the rate of flow of coolant through any other spool.
Claim 4
Dependent Claim
229 words
A liquid sample single shell multicircuit heat exchanger wherein each heat exchange circuit has an independently adjustable rate of flow of coolant comprising; a. a heat exchanger shell; b. a first plenum chamber at one end of said shell having liquid coolant inlet tube means connected thereto; c. a second plenum chamber at the other end of said shell having liquid coolant outlet tube means connected thereto; d. a plurality of hollow cylindrical baffle spools positioned inside said heat exchanger shell and extending between said first and second plenum chambers, each of said spools communicating with both of said plenum chambers so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; e. a coil of tubing for a liquid sample to be cooled positioned in each of said spools, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith and both extending out of one end only of said spool and thence through one of said plenum chambers and out of one end of said heat exchanger, whereby the liquid sample tubing is surrounded by the coolant in heat conducting relation thereto; and f. separate means operatively associated with each of said spools to regulate the flow of coolant through that individual spool independently of the rate of flow of coolant through any other spool.
Claim 5
Dependent Claim
121 words
Apparatus as in claim 2 wherein the means to regulate the flow of coolant coMprises a first pair of apertures defined at the coolant entrance to each of said baffle spools, a control plate rotatably mounted on a shaft extending through said first plenum chamber and out of the end of said heat exchanger, said control plate having a second pair of apertures which can be fully aligned with said first pair of apertures in one rotational position of said control plate to permit maximum coolant flow and which can be totally misaligned with said first pair of apertures in another rotational position of said plate to fully restrict coolant flow, and means outside said heat exchanger to rotate said shaft.
Claim 6
Dependent Claim
261 words
A single shell multicircuit heat exchanger wherein each heat exchange circuit has an independently adjustable rate of flow of coolant comprising; a. a heat exchanger shell; b. a first plenum chamber at one end of said shell having coolant inlet means connected thereto; c. a second plenum chamber at the other end of said shell having coolant outlet means connected thereto; d. a plurality of hollow cylindrical baffle spools positioned inside said heat exchanger shell and extending between said first and second plenum chambers, each of said spools communicating with both of said plenum chambers so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; e. a coil of tubing for a fluid sample to be cooled positioned in each of said spools, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith and both extending out of one end only of said spool and thence through one of said plenum chambers and out of one end of said heat exchanger; and f. separate means to regulate the flow of coolant in each of said spools comprising a single aperture defined at the coolant entrance to each of said baffle spools, a disc rotatably mounted on a shaft extending through said first plenum chamber and out of said heat exchanger, said shaft and disc being positioned and arranged so that said disc fully covers and restricts said aperture in at least one rotational position of said disc, and means outside said heat exchanger to rotate said shaft.
Claim 7
Dependent Claim
261 words
A single shell multicircuit heat exchanger wherein each heat exchange circuit has an independently adjustable rate of flow of coolant comprising; a. a heat exchanger shell; b. a first plenum chamber at one end of said shell having coolant inlet means connected thereto; c. a second plenum chamber at the other end of said shell having coolant outlet means connected thereto; d. a plurality of hollow cylindrical baffle spools positioned inside said heat exchanger shell and extending between said first and second plenum chambers, each of said spools communicating with both of said plenum chambers so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; e. a coil of tubing for a fluid sample to be cooled positioned in each of said spools, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith and both extending out of one end only of said spool and thence through one of said plenum chambers and out of one end of said heat exchanger; and f. separate means to regulate the flow of coolant in each of said spools comprising a single aperture defined at the coolant entrance to each of said baffle spools, a disc rotatably mounted on a shaft extending through said first plenum chamber and out of said heat exchanger, said shaft and disc being positioned and arranged so that said disc fully covers and restricts said aperture in at least one rotational position of said disc, and means outside said heat exchanger to rotate said shaft.
Claim 8
Dependent Claim
76 words
Apparatus as in claim 2 wherein the means to regulate the flow of coolant comprises a single aperture defined at the coolant entrance to each of said baffle spools, and a conical valve member rotatably mounted for axial movement into and out of said baffle spool, said valve fully closing the coolant entrance to said spool when it is fully seated in said spool, and means extending outside of said heat exchanger to rotate said valve.
Claim 9
Dependent Claim
84 words
Apparatus as in claim 2 wherein; a. each of said coils of sample tubing is coiled around the outside of an inner closed cylindrical hollow baffle and returns through the center of said hollow baffle, which is coaxial with said spool and which reduces the interior cross sectional area for flow of coolant through said spool to increase its velocity at a given pressure; and b. said flow regulating means comprises adjustable restriction means positioned at the coolant inlet to each of said spools.
Claim 10
Dependent Claim
288 words
A single shell multicircuit heat exchanger wherein each heat exchange circuit has an independently adjustable rate of flow of coolant comprising; a. a heat exchanger shell; b. a first plenum chamber at one end of said shell having coolant inlet means connected thereto; c. a second plenum chamber at the other end of said shell having coolant outlet means connected thereto; d. a plurality of hollow cylindrical baffle spools positioned inside said heat exchanger shell and extending between said first and second plenum chambers, each of said spools communicating with both of said plenum chambers so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; e. a coil of tubing for a fluid sample to be cooled positioned in each of said spools, together with an inner closed cylindrical hollow baffle, around the outside of which the sAmple tubing is coiled, which baffle is coaxial with said spool and which reduces the interior cross-sectional area for flow of coolant through said spool to increase its velocity at a given pressure, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith both extending out of one end only of said spool and thence through one of said plenum chambers and out of one end of said heat exchanger; and f. separate means operatively associated with each of said spools to regulate the flow of coolant through that individual spool independently of the rate of flow of coolant through any other spool, said flow regulating means comprising adjustable restriction means positioned at the coolant inlet to each of said spools, each of said flow regulating means being independently adjustable from outside of said heat exchanger shell.
Claim 11
Dependent Claim
288 words
A single shell multicircuit heat exchanger wherein each heat exchange circuit has an independently adjustable rate of flow of coolant comprising; a. a heat exchanger shell; b. a first plenum chamber at one end of said shell having coolant inlet means connected thereto; c. a second plenum chamber at the other end of said shell having coolant outlet means connected thereto; d. a plurality of hollow cylindrical baffle spools positioned inside said heat exchanger shell and extending between said first and second plenum chambers, each of said spools communicating with both of said plenum chambers so that each spool defines the outer limits of a separate coolant flow path between said plenum chambers; e. a coil of tubing for a fluid sample to be cooled positioned in each of said spools, together with an inner closed cylindrical hollow baffle, around the outside of which the sAmple tubing is coiled, which baffle is coaxial with said spool and which reduces the interior cross-sectional area for flow of coolant through said spool to increase its velocity at a given pressure, each of said coils having a sample inlet tube and a sample outlet tube continuous therewith both extending out of one end only of said spool and thence through one of said plenum chambers and out of one end of said heat exchanger; and f. separate means operatively associated with each of said spools to regulate the flow of coolant through that individual spool independently of the rate of flow of coolant through any other spool, said flow regulating means comprising adjustable restriction means positioned at the coolant inlet to each of said spools, each of said flow regulating means being independently adjustable from outside of said heat exchanger shell.
Claim 12
Dependent Claim
20 words
Apparatus as in claim 6 wherein each of said coils is separately and independently removable from said heat exchanger shell.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |