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.

The present application relates to an exhaust steam waste heat recovering and supplying system used for air-cooling units in large thermal power plants. Each of the two steam turbines has independent exhaust steam extraction system, and the exhaust steam extraction system of each steam turbine is connected with corresponding pre-condenser to heat the return water of the heating network. The exhaust steam extraction system of each steam turbine is further connected with the corresponding steam ejector; the exhaust port of each steam is connected with the corresponding steam ejector condenser to heat the return water of the heating network. The exhaust steam waste heat of the air-cooling units in a thermal power plant can be recycled in high efficiency to improve the utility rate of the exhaust steam, increase heating capacity, reduce cold end loss to the largest extent, and maximize the energy saving benefits.

Steam generators in power plants exchange energy from a primary medium to a secondary medium for energy extraction. Steam generators includes one or more primary conduits and one or more secondary conduits. The conduits do not intermix the mediums and may thus discriminate among different fluid sources and destinations. One conduit may boil feedwater while another reheats steam for use in lower and higher-pressure turbines, respectively. Valves and other selectors divert steam and/or water into the steam generator or to other turbines or the environment for load balancing and other operational characteristics. Conduits circulate around an interior perimeter of the steam generator immersed in the primary medium and may have different cross-sections, radii, and internal structures depending on contained. A water conduit may have less flow area and a tighter coil radius. A steam conduit may include a swirler and rivulet stopper to intermix water in any steam flow.

Steam generators in power plants exchange energy from a primary medium to a secondary medium for energy extraction. Steam generators includes one or more primary conduits and one or more secondary conduits. The conduits do not intermix the mediums and may thus discriminate among different fluid sources and destinations. One conduit may boil feedwater while another reheats steam for use in lower and higher-pressure turbines, respectively. Valves and other selectors divert steam and/or water into the steam generator or to other turbines or the environment for load balancing and other operational characteristics. Conduits circulate around an interior perimeter of the steam generator immersed in the primary medium and may have different cross-sections, radii, and internal structures depending on contained. A water conduit may have less flow area and a tighter coil radius. A steam conduit may include a swirler and rivulet stopper to intermix water in any steam flow.

The single working-medium vapor combined cycle and the vapor power device for combined cycle is provided in this invitation and belongs to the field of energy and power technology. The condenser connects the mixing evaporator by a condensate pipeline via the circulating pump and the preheater, the expander connects the mixing evaporator by a vapor channel via the middle-temperature evaporator, the mixing evaporator connects the compressor and the second expander by a vapor channel, the compressor connects the expander by a vapor channel via the high-temperature heat exchanger, the second expander connects the condenser by a vapor channel; the condenser connects the middle-temperature evaporator by a condensate pipeline via the second circulating pump and a second preheater, the middle-temperature evaporator connects the third expander and the condenser by a vapor channel; the high-temperature heat exchanger, the middle-temperature evaporator, the mixing evaporator, the preheater and the second preheater connects the external part by a working-medium channel of the heat source, the expander connects the compressor and transfers power, the expander, the second expander and the third expander connects the external part and output power, in summary, these above-mentioned equipment and pipelines build up the vapor power device for combined cycle.

Apparatus for electric power generation. A system includes a boiler for heating a fluid, the boiler directing a first portion of the heated fluid to a turbine for the generation of electric power and a second portion of the heated fluid to a thermoelectric (TE) generator, and a condenser connected to the turbine that condenses hot fluid emitted from the turbine and feeds the condensed fluid to the TE generator, the TE generator generating electric power from a difference in temperature of the second portion of the heated fluid and the condensed fluid from the turbine.

Apparatus for electric power generation. A system includes a boiler for heating a fluid, the boiler directing a first portion of the heated fluid to a turbine for the generation of electric power and a second portion of the heated fluid to a thermoelectric (TE) generator, and a condenser connected to the turbine that condenses hot fluid emitted from the turbine and feeds the condensed fluid to the TE generator, the TE generator generating electric power from a difference in temperature of the second portion of the heated fluid and the condensed fluid from the turbine.

A coal fired oxy boiler power plant is disclosed in which a steam coil oxygen preheater located on an oxygen line Air Separation Unit is thermally integrated with the condensate system. Thermal energy for the steam coil oxygen preheater is provided via an extraction line connected to a steam extraction port of an intermediate pressure steam turbine. A drain line of the steam coil oxygen preheater fluidly connects the steam coil oxygen preheater to a point of the Rankine steam cycle fluidly within the condensate system.

A coal fired oxy boiler power plant is disclosed in which a steam coil oxygen preheater located on an oxygen line Air Separation Unit is thermally integrated with the condensate system. Thermal energy for the steam coil oxygen preheater is provided via an extraction line connected to a steam extraction port of an intermediate pressure steam turbine. A drain line of the steam coil oxygen preheater fluidly connects the steam coil oxygen preheater to a point of the Rankine steam cycle fluidly within the condensate system.

A method for heat integration between a chemical synthesis plant that runs an exothermic reaction and (ii) and a partner plant that generates a working fluid such as steam (e.g., runs a power cycle). The present disclosure describes both internal and external heat integration. Internal heat integration may provide heat from the exothermic reaction (e.g., from methanol synthesis) to a reboiler associated with a distillation column of the chemical synthesis plant. External heat integration may use heat from the exothermic reaction to preheat a condensed water stream (which stream is downstream from the turbine and condenser of the power cycle). Such reduces the need for bleed off the turbine to preheat condensed water as part of the power cycle. A bleed off the turbine provides heat to the reboiler associated with the distillation column of the chemical synthesis plant. Heat integration provides overall improved energy use within both plants.