US3751783A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of erection of horizontal surfaced heat transfer modules for steam generating units
Assignee: Combustion Engineering Inc
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Filing: 1971-06-22
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Granted: 1973-08-14
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Expires: 1991-06-22
Abstract
Abstract A method of erection of heat transfer module sections for horizontal surfaced steam generating units wherein hydraulically operated jacks are placed on the overhead structure in the permanent hanger line. Threaded rods extend through the jacks to the grade elevation where they are attached to the permanent hanger system. The heat transfer modules which may be superheater, reheater or economizer sections are individually brought into the furnace cavity and put together at grade elevation raising each module just high enough to bring in the next module for connection to the preceding module until the total surface is assembled. The jacks are then run up to the fully erected position for the total surface arrangement and the permanent hanger system installed to the furnace structural support.
Inventors
- 👤 J Roberts
- 👤 H Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:29
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/20; F22B37/202; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49387; Y10T29/49826; Y10T29/49828; Y10T29/49904
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
250 words
A method of erection of heat transfer module sections for a horizontal surface steam generating unit having an overhead structure in a permanent hanger line, a furnace cavity, and a grade elevation comprising the steps of: supporting a selected jacking system on the overhead structure of the steam generating unit; extending rods through said jacking system into the furnace cavity of the unit to the grade elevation thereof; attaching the permanent hanger system to the rods at grade elevation; actuating said jacking system to raise said rods and said permanent hanger system to only a height sufficient to permit insertion of a horizontal surfaced heat transfer module into the furnace cavity; inserting said horizontal surfaced heat transfer module into said furnace cavity at grade level and fixing said module to said permanent hanger system; building up the remainder of the heat transfer surface by actuating said jacking system to raise the combined assembled structure to only a height sufficient to permit the insertion of each next horizontal surfaced heat transfer module into the furnace cavity, inserting in turn each of said horizontal surfaced heat transfer modules into said furnace cavity at grade level, and fixing each of said modules to the preceding module until the total heat transfer surface is assembled; actuating said jacking system to run said total assembled horizontal heat transfer surface to its fully erected height within said furnace cavity, and permanently fixing said horizontal heat transfer surface to said furnace structure at said fully erected height.
Claim 2
Independent Claim
250 words
A method of erection of heat transfer module sections for a horizontal surface steam generating unit having an overhead structure in a permanent hanger line, a furnace cavity, and a grade elevation comprising the steps of: supporting a selected jacking system on the overhead structure of the steam generating unit; extending rods through said jacking system into the furnace cavity of the unit to the grade elevation thereof; attaching the permanent hanger system to the rods at grade elevation; actuating said jacking system to raise said rods and said permanent hanger system to only a height sufficient to permit insertion of a horizontal surfaced heat transfer module into the furnace cavity; inserting said horizontal surfaced heat transfer module into said furnace cavity at grade level and fixing said module to said permanent hanger system; building up the remainder of the heat transfer surface by actuating said jacking system to raise the combined assembled structure to only a height sufficient to permit the insertion of each next horizontal surfaced heat transfer module into the furnace cavity, inserting in turn each of said horizontal surfaced heat transfer modules into said furnace cavity at grade level, and fixing each of said modules to the preceding module until the total heat transfer surface is assembled; actuating said jacking system to run said total assembled horizontal heat transfer surface to its fully erected height within said furnace cavity, and permanently fixing said horizontal heat transfer surface to said furnace structure at said fully erected height.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein selection of said jacking system is accomplished so as to provide a series of hydraulic jacks, the number and positioning thereof being dependent upon the particular horizontal heat transfer surface configuration to be erected.
Claim 4
Dependent Claim
42 words
The method of claim 1 wherein the elements of the assembled horizontal heat transfer surface are selected in proper order from superheater modules, reheater modules or economizer modules depending upon the particular heat transfer surface configurations desired for the steam generating unit.
References Cited (Backward Citations)
US1839578A
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US2360222A
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US2605540A
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US2775810A
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US2746137A
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US3235956A
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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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |