Combined heat recovery device
AssigneeYucheng Feng
InventorYucheng Feng
Life of this patent
Estimating the term…
Abstract
A combined heat recovery device includes a high pressure cylinder of a steam turbine; a main steam pipe; a final-stage steam extraction pipe; an additional pipe additionally provided on the main steam pipe; a heat exchanger taking main steam in the main steam pipe as a heat source; a feedwater heater taking discharged steam from the heat exchanger as a heat source; and a steam side regulating valve provided on the additional pipe, configured to regulate main steam in the additional pipe, and capable of controlling a pressure of extracted steam behind the steam side regulating valve to control an outlet temperature of the feedwater heater to reach a preset feedwater temperature.
Claims19
A combined heat recovery device, comprising:
- a high pressure cylinder of a steam turbine;
- a main steam pipe;
- a final-stage steam extraction pipe;
- a heat exchanger, using a main steam in the main steam pipe as a heat source, wherein a working substance heated by the heat exchanger comprises at least one of:
- boiler hot secondary air, boiler hot primary air, or boiler feed powder, so that heat is sent into a boiler associated with the heat exchanger and fuel of the boiler is replaced;
- a feedwater heater, using a discharged steam from the heat exchanger as a heat source;
- an additional pipe, arranged on the main steam pipe and configured to connect the heat exchanger with the feedwater heater in series;
- and
- a steam side regulating valve, arranged on the additional pipe and configured to regulate the main steam in the additional pipe, wherein the steam side regulating valve is operative to control a pressure of extracted steam behind the steam side regulating valve to control an outlet temperature of the feedwater heater to reach a preset feedwater temperature.
Dependencies are inferred from the claim text.