Apparatus for providing uniform heat transfer in superheating steam generators
AssigneeRochester District Heating Cooperative
InventorsHoward M. Cone, II, Dickie A. Van Der Lyke
Life of this patent
Estimating the term…
Abstract
A superheated steam generator having superheating steam tubes and boiler tubes fluidly connected to a boiler, wherein the steam tubes and boiler tubes extend, intermediate of a heat source and the boiler. Localized insulation is located adjacent the superheating steam tubes and intermediate of the boiler and the heat source to reduce heat transfer to the boiler in the region of the superheating steam tubes. To prevent local roiling within the boiler, the thermal resistance of the local insulation and the superheating steam tubes is substantially equal to the thermal resistance of the boiler tubes.
Claims5
An apparatus for producing superheated steam, comprising:
- (a) a boiler for retaining a quantity of liquid for conversion to steam;
- (b) a heater for supplying sufficient thermal energy to the boiler for converting a portion of the liquid to steam;
- (c) superheating steam tubes fluidly connected to the boiler and thermally exposed to the heater for raising the thermal content of the steam;
- and
- (d) localized heat transfer reducing means disposed between the heater and the boiler proximal to the superheating steam tubes for sufficiently inhibiting the local transfer of thermal energy to the boiler to substantially prevent carryover to the superheating steam tubes.
An apparatus for producing superheated steam, comprising:
- (a) a boiler for retaining a quantity of liquid to be vaporized:
- (b) heating means for transferring thermal energy to the boiler;
- (c) a plurality of boiler tubes fluidly connected to the boiler, the boiler tubes thermally coupled to the heating means for generating steam in the boiler tubes;
- (d) a plurality of superheating tubes fluidly connected to the boiler, the superheating tubes having a length extending between the heating means and the boiler to thermally couple the heating means to the steam;
- and
- (e) localized insulation intermediate of the superheating tubes and the boiler for reducing heat transfer to the boiler.
In an improved boiler having a first and a second set of fluid transporting tubes extending between the boiler and a heat source, wherein the first set of tubes has a greater thermal resistance than the second set of tubes during operating conditions, the improvement comprising:
- (a) means for locally reducing heat transfer from the heat source to the boiler in the area of the second set of tubes.
An apparatus having a furnace plenum for generating superheated steam, comprising:
- (a) a boiler having a heated region thermally exposed to the furnace plenum;
- (b) a plurality of boiler tubes fluidly connected to the boiler and extending from the boiler through the furnace plenum to generate steam;
- (c) a plurality of superheating tubes fluidly connected to the boiler and having a length extending through the furnace plenum for conducting steam from the boiler through the furnace plenum;
- and
- (d) localized means between the superheating tubes and a portion of the heated region for locally reducing heat transfer to the boiler in the area of the superheating tubes.
An apparatus for generating superheated steam, comprising:
- (a) a heat source;
- (b) a boiler having a heated region exposed to the heat source;
- (c) a plurality of boiler tubes fluidly connected to the boiler and having a length extending between the heat source and the heated region;
- (d) superheating tubes fluidly connected to the boiler and having a length extending between the boiler and the heat source to overlie a superheating section of the boiler;
- and
- (e) localized means between the superheating tubes and the superheating section for substantially precluding roiling in the superheating section of the boiler.
Dependencies are inferred from the claim text.