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Title: Integral separation start-up system for a vapor generator with variable pressure furnace circuitry
Claims: What is claimed is: 1. A start-up system for use in a power plant having a steam turbine and a condenser, said system comprising a vapor generator, means for establishing a main fluid flow path connecting said turbine, said condenser and said vapor generator in a series flow relationship, a plurality of separators connected in said main flow path between said vapor generator and said turbine, said separators adapted to accommodate the full operating load conditions of said vapor generator after start-up and to separate the fluid from said vapor generator into a vapor and a liquid during start-up, said vapor being passed in said main flow path to said turbine, means for establishing an auxiliary flow path extending out of said main flow path and connected to said separators for receiving the liquid from said separators during start-up, said auxiliary flow path including one branch flow line connected directly to said condenser and another branch flow line connected to said main flow path between said condenser and said vapor generator. 2. The system of claim 1 further comprising pump means for forcing said fluid through said main flow path and said auxiliary flow path, said pump means providing the sole means of fluid circulation during start-up and during full operating load conditions. 3. The system of claim 1 further comprising valve means associated with each of said branch flow lines for controlling the flow of liquid through said lines. 4. The system of claim 1 further comprising heat exchange means disposed in said main flow path between said condenser and said vapor generator, said other branch flow line being connected to said main flow path upstream of said heat exchange means. 5. A method of starting up a power plant having a turbine and a condenser, comprising the steps of connecting said turbine and said condenser in a main flow path with a vapor generator in a series flow relationship, passing fluid through said vapor generator to heat said fluid, connecting a plurality of separators in said main flow path between said vapor generator and said turbine so that said separators separate said fluid into a vapor and liquid during start-up and accommodate the full operating load conditions of said vapor generator after start-up, passing the vapor from said separators in said main flow path to said turbine, and selectively passing the liquid from said separators out of said main flow path directly to said condenser or back to said main flow path between said condenser and said vapor generator. 6. The method of claim 5 further comprising the step of pumping said fluid through said main flow path and said auxiliary flow path, said step of pumping providing the sole method of fluid circulation during start-up and during full operating load conditions. 7. The method of claim 5 further comprising the step of operating said vapor generator at variable pressures during start-up. 8. The method of claim 5 further comprising the step of heating said liquid in said main flow path between said condenser and said vapor generator. Other info: Inventors: Stevens, William D. (North Caldwell, NJ, US) Gorzegno, Walter P. (Morristown, NJ, US) Application Number: 533389 Filing Date: 1974-12-16 Publication_date: 1976-05-04 Assignee: Foster Wheeler Energy Corporation (Livingston, NJ) Primary Class(es): 122/406.1 122/406.5, 122/479.7 Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Sprague, Kenneth W. Assistant Examiner: Attorney: Naigur; Marvin A., Wilson; John E. |
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