64 results about "Feedwater heater" patented technology

The invention relates to the technical field of multi-energy complementary power generation, and discloses an industrial steam supply peak shaving system and method coupling fused salt heat storage and solar energy, and the industrial steam supply peak shaving system comprises a coal-fired power generation system and an industrial steam supply system; in the heat storage mode, the boiler, the steam cooler and the condenser are sequentially connected; in the heat release mode, the high-pressure heater, the primary feed water heater and the low-pressure cylinder are sequentially connected through pipelines; and the feed pump, the secondary feed water heater and the boiler are connected in sequence. In the low ebb of the electrical load, solar energy is used for heating fused salt to store heat, and part of high-temperature steam is extracted from steam-water circulation of the improved coal-fired power generation system to store the heat in a heat storage device and does not enter a steam turbine for power generation; the power load output is adjusted by adjusting the thermal load output of the thermodynamic system in the power generation process, and load decoupling of the boiler and the steam turbine is achieved. And in the electrical load peak, the stored heat energy is released back to steam-water circulation, and the electrical load of the coal-fired power generation system is increased.

The invention relates to a horizontal integrated hairpin type feed water heater for a power plant. The horizontal integrated hairpin type feed water heater comprises a left pipe box, a right pipe box, two pipe plates, a group of feed water inlet and outlet pipes, a U-shaped pipe bundle, two straight-section shells, a hairpin bend connected with the two straight-section shells, a steam inlet, a drain outlet and other parts. The device is particularly suitable for heaters with small pipe side feed water flow and higher temperature rise; the high-temperature feed water and the low-temperature feed water are distributed in the two relatively independent tube boxes, so that the temperature difference stress of a tube plate and a tube box sealing head is avoided; the overheating section, the condensation section and the subcooling section are integrated in one device, so that the occupied area of the device and the number of connecting pipelines can be reduced; deformation stress caused by thermal displacement difference of two sections of barrel bodies of the equipment can be greatly reduced through four-support configuration; the overall height of the equipment can be reduced through horizontal arrangement, and overhaul and maintenance are facilitated.

A heating device based on the form of heat supply using a secondary circuit in a nuclear power plant, and a control method therefor. The heating device based on the form of heat supply using a secondary circuit in a nuclear power plant comprises: a device for heat supply using extraction steam from a steam turbine, and multiple stages of heat exchangers, wherein heat supply drained-water end outlets of multiple stages of high-pressure feedwater heaters in the device for heat supply using the extraction steam from the steam turbine are respectively correspondingly connected to hot-side medium inlets of the multiple stages of heat exchangers on a one-to-one basis; hot-side medium outlets of the multiple stages of heat exchangers are all connected to drained-water end inlets of low-pressure feedwater heaters in the device for heat supply using the extraction steam from the steam turbine; and cold-side medium inlets and cold-side medium outlets of the multiple stages of heat exchangers are all connected to a heat supply network in series. While heating is achieved, the cost for transforming a secondary circuit pipe and the impact on a working medium in a main steam pipe are reduced.

The application discloses a generator set shared peak regulation system and a working method thereof. The system comprises a steam generator, a steam power generation device, a heat recovery device, a generator, an energy storage switch, a water taking shutoff valve, a backwater regulating valve, a molten salt cold tank, a cold molten salt pump, a molten salt electric heater, a hot molten salt tank, a hot molten salt pump, a feedwater heater inlet shutoff valve, a feedwater heater, a feedwater heater outlet shutoff valve, a heat network water heater inlet shutoff valve, a heat network water heater, a heat network water heater outlet regulating valve and a heat network water taking shutoff valve. The application realizes the peak regulation of two or more generators by one peak regulation system, is a shared energy storage system, uses a heat storage medium such as molten salt to realize large-capacity, long-time and high-quality energy storage, realizes the deep peak regulation of the unit, and the heat energy has diversified uses. The application can realize the flexible transformation of the whole plant through single investment, and has high equipment utilization.

A nuclear power plant comprising at least one nuclear reactor having a steam generator, a steam cycle including the steam generator, a first turbine fluidly coupled to the steam generator, a first condenser fluidly coupled to the first turbine, and a feedwater heater fluidly coupled to the first condenser and the steam generator, an intermediate thermal loop including the first condenser, and an evaporator, and an organic cycle including the evaporator, a second turbine fluidly coupled to the evaporator, a second condenser fluidly coupled to the second turbine, and a heat exchanger fluidly coupled to the second condenser and the evaporator.

The invention belongs to the field of energy storage, and particularly relates to an energy storage system and method based on a silicon-based ultrahigh-temperature phase change heat storage coupling gas turbine. The system comprises a silicon-based ultra-high-temperature heat storage device, an outlet of the silicon-based ultra-high-temperature heat storage device is connected with an ultra-high-temperature heat recovery device, an outlet of the ultra-high-temperature heat recovery device is connected with a circulating fan and a combustion chamber, and the circulating fan is connected with an inlet of the silicon-based ultra-high-temperature heat storage device; an outlet of the combustion chamber is connected with a gas turbine, the gas turbine is connected with a gas compressor, and the gas compressor is connected with an inlet of the ultra-high-temperature heat recovery device; an outlet of the gas turbine is connected with a waste heat boiler, and an outlet of the waste heat boiler is connected with a feed water heater and a steam turbine. The ultrahigh-temperature phase-change heat storage device with the silicon-based phase-change material as the heat storage medium is adopted, electric energy is converted into high-grade heat energy to be stored, and the efficient electricity-heat-electricity energy storage round-trip efficiency can be achieved and can reach 60% through an existing gas-steam combined cycle unit. If combined heat and power generation is considered, the energy storage efficiency can reach 85%.

The present invention provides a method for controlling the reactivity of a boric acid-free reactor in a secondary system of a pressurized light-water reactor, wherein: a turbine and a main water feeding system of a pressurized light-water reactor comprise a steam generator (S / G), a high-pressure turbine, a low-pressure turbine, a high-pressure feedwater heater, and a low-pressure feedwater heater; the high pressure turbine is provided with extracted steam ① and ② capable of heating feedwater, the low pressure turbine is provided with extracted steam ③ and ④ capable of heating feedwater, the high-pressure feedwater heater is provided with high pressure heaters ① and ② for receiving extracted steam from the turbines to heat feedwater, and a low-pressure feedwater heater is provided with low pressure heaters ③ and ④ for receiving extracted steam from the turbines to heat feedwater; and when operated with constant reactivity and temperature set as default values, the high-pressure heater ① receives extracted steam ② of the high-pressure turbine to heat feedwater, the high-pressure heater ② receives extracted steam ① of the high-pressure turbine to heat feedwater, the low-pressure heater ③ receives extracted steam ④ of the low-pressure turbine to heat feedwater, and the low-pressure heater ④ receives extracted steam from the low-pressure turbine ③ to heat feedwater.

The present invention discloses a heating device based on the secondary circuit heat supply mode of a nuclear power plant and its control method, relating to the field of secondary circuit heat supply of a nuclear power plant. In the heating device based on the secondary circuit heat supply mode of a nuclear power plant, the heat supply drain end outlets of the multi-stage high-pressure feedwater heaters in the steam turbine extraction steam heat supply device are respectively connected in a one-to-one manner to the high-temperature side medium inlets of the multi-stage heat exchangers. The high-temperature side medium outlets of the multi-stage heat exchangers are all connected to the drain end inlets of the low-pressure feedwater heaters in the steam turbine extraction steam heat supply device. The low-temperature side medium inlets and low-temperature side medium outlets of the multi-stage heat exchangers are all connected in series to the heat supply pipe network. The present invention can realize heat supply without changing the main pipeline of the secondary circuit, and can reduce the renovation cost of the secondary circuit pipeline and the influence on the working fluid of the main steam pipeline.

The invention discloses a biomass afterburning tower-type photo-thermal power generation system and an operation method, and belongs to the technical field of photo-thermal power generation. The biomass afterburning tower-type photo-thermal power generation system comprises a molten salt loop, a water loop and an afterburning loop; the afterburning loop comprises a biomass afterburning system, a fused salt heater, a superheated steam heater, a reheated steam heater and a feed water heater; high-temperature flue gas formed in the biomass afterburning system exchanges heat with fused salt in the fused salt loop and superheated steam and reheated steam in the water loop through the fused salt heater, the superheated steam heater and the reheated steam heater to form medium-temperature flue gas. And the medium-temperature flue gas exchanges heat with feed water through a feed water heater to form low-temperature flue gas which is used for improving the quality of biomass. The system is suitable for a tower type system with high weather fluctuation sensitivity, fused salt in the fused salt loop and superheated steam and reheated steam in the water loop are heated through heat generated in the afterburning loop, and therefore the heat storage amount in the high-temperature fused salt tank is guaranteed, the efficiency of a steam turbine is improved, and energy waste and pollutant emission are reduced.

The present invention relates to a combined cycle coupled molten salt energy storage deep peak shaving system and a method thereof. The system includes: a circulating power generation mechanism, including a steam turbine unit and a waste heat boiler unit. The steam generated by the waste heat boiler unit enters the steam turbine unit to do work and generate electricity. The waste heat boiler unit includes a feed water heater; a molten salt energy storage mechanism, including a low-temperature molten salt storage tank, a high-temperature molten salt storage tank, a primary molten salt heater, a secondary molten salt heater, a low-temperature molten salt pump, a high-temperature molten salt pump, a high-pressure steam superheater, a high-pressure steam generator, a low-pressure steam superheater, a low-pressure steam generator, and a first feed water pump. The technical solution of the present invention realizes the cascaded and efficient utilization of the waste heat of high-temperature flue gas and the heat of high-temperature molten salt, greatly reduces the heat transfer temperature difference, reduces the irreversible loss, and also increases the output of high-quality steam. After the steam is output, it continues to act on the steam turbine unit, and also greatly improves the power generation capacity of the steam turbine unit.

The application is suitable for supercritical technical field, and provides a primary frequency modulation control method, which comprises the following steps: designing a low-pass high filter and a high-pass low filter, decomposing a frequency signal, and obtaining low-frequency components and high-frequency components of the frequency signal respectively; sending the low-frequency components into a condensate water flow bypass valve controller, adjusting the bypass valve opening degree according to the low-frequency components; sending the low-frequency components into a low-level feedwater heater water level adjustment logic as a feedforward signal, and pre-judging and adjusting the low-level feedwater heater water level; sending the high-frequency components into a feedwater flow bypass valve controller, and adjusting the feedwater bypass valve opening degree according to the high-frequency components; and sending the high-frequency components into a high-level feedwater heater water level adjustment logic as a feedforward signal, and pre-judging and adjusting the high-level feedwater heater water level. By adjusting the water quantity on the high-level feedwater heater side, the steam side extraction quantity is changed, the temperature change is stable, and the stable operation of the unit is beneficial; the primary frequency modulation of the power grid is provided with an effective auxiliary means, and the frequency modulation precision and the frequency modulation response speed are improved.

The invention provides a water generation system capable of effectively utilizing waste heat of scavenging air cooling water. The present invention is a fresh water system (1) for desalinating seawater contained in a ship, the fresh water system being provided with: a fresh water device (2) provided with a heater (3) for heating and evaporating seawater, and a condenser (4) for cooling and condensing steam generated by evaporation of seawater; a scavenging air cooler (14) configured to be capable of cooling scavenging air supplied to an internal combustion engine (diesel engine (10)) for a ship by heat exchange with scavenging air cooling water; and a feed water heater (5) configured to be capable of heating the seawater supplied to the heater (3) by heat exchange with at least a portion of the scavenging air cooling water discharged from the scavenging air cooler (14).

The utility model discloses a kind of anticorrosion devices of low pressure feedwater heater drainage system under different working conditions, including automatic oxygenation system, automatic ethanolamine system, monitoring system and control system;Automatic oxygenation system includes compressed air storage tank, oxygenation electric cut-off valve and low pressure heater;Compressed air storage tank is connected with oxygenation electric cut-off valve, oxygenation electric cut-off valve is connected with low pressure heater;Automatic ethanolamine system includes ethanolamine solution tank and dosing pump electric cut-off valve;Ethanolamine solution tank is connected with dosing pump electric cut-off valve, dosing pump electric cut-off valve is connected with low pressure heater;Low pressure heater is connected with monitoring system, monitoring system is connected with control system, oxygenation electric cut-off valve and dosing pump electric cut-off valve are connected with control system.The utility model can monitor low pressure feedwater heater drainage system water vapor quality in real time.Realize AVT (O) and OT two kinds of operating condition Full coverage anticorrosion requirement, accurate, real-time feedback low pressure feedwater heater drainage water vapor quality, through ammonia oxygen collaborative device dynamic optimization oxygenation and ethanolamine addition amount Realize intelligent collaborative anticorrosion control.

The invention discloses a peak regulation heat storage thermal power unit thermodynamic system and an operation method thereof, and belongs to the technical field of thermal power generation. Comprising a boiler, a turbine high-pressure cylinder, a turbine intermediate-pressure cylinder and a turbine low-pressure cylinder. A first outlet of the boiler is connected with a turbine high-pressure cylinder, and an outlet of the turbine high-pressure cylinder is connected to a second inlet of the boiler; a second outlet of the boiler is connected with a steam turbine intermediate-pressure cylinder, a first outlet of the steam turbine intermediate-pressure cylinder is sequentially connected with a heat storage unit and a feed water heater, and the feed water heater is connected to a first inlet of the boiler; a second outlet of the turbine intermediate-pressure cylinder is sequentially connected with a turbine low-pressure cylinder, a condenser and a condensate pump; an outlet of the condensate pump is divided into two paths, one path is sequentially connected with a condensate heater and a deaerator, and the deaerator is connected to a feed water heater; the other path of the condensate pump outlet is connected to the heat storage unit. And efficient combination of a heat storage technology and a thermal power generating unit thermodynamic system is realized.

The application discloses a waste heat utilization system and relates to the technical field of sewage treatment. The waste heat utilization system comprises a low-temperature multi-effect distillation device, a flue gas heat exchanger, a first flash tank, a second flash tank and a make-up water heater. The low-temperature multi-effect distillation device is provided with sewage inlets. The cold source inlet of the flue gas heat exchanger is communicated with the product water outlet of the low-temperature multi-effect distillation device. The water inlet of the first flash tank is communicated with the cold source outlet of the flue gas heat exchanger. The steam outlet of the first flash tank is communicated with the steam inlet of the first effect body. The water inlet of the second flash tank is communicated with the condensate water outlet of the first effect body. The heat source inlet of the make-up water heater is communicated with the steam outlet of the second flash tank. The cold source outlet of the make-up water heater is communicated with the make-up water inlet of at least one evaporation effect body. The waste heat utilization system realizes the step-by-step utilization of heat energy, greatly improves the overall thermal efficiency, reduces the energy consumption and cost of unit water production and solves the problem of energy consumption of high-temperature condensate water cooling.

The invention relates to the technical field of feed water heater operation performance analysis, and provides a nuclear power feed water heater operation performance analysis method which comprises the following steps: calculating a pipe side state according to pipe side measuring point data of a feed water heater, calculating states of a feed water heater shell side and a drain outlet pipeline, and calculating heat exchange performance of a condensation zone. Comprising condensation zone heat transfer efficiency and condensation heat transfer coefficient. The operation performance and the interface thermodynamic state of the nuclear power plant feed water heater can be efficiently and accurately analyzed.

This invention provides a thermal power generation system coupled with a supercritical carbon dioxide cycle, comprising: a thermal power unit, which includes a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a low-pressure feedwater heater group, a deaerator, and a high-pressure feedwater heater group connected in sequence to form a steam circulation loop; the extraction steam output end of the low-pressure cylinder is connected to the low-pressure feedwater heater group, and the extraction steam output ends of the intermediate-pressure cylinder and the high-pressure cylinder are respectively connected to the high-pressure feedwater heater group; a supercritical carbon dioxide subsystem, which includes a low-pressure cooler group, a first compressor, a high-pressure heater group, and a first turbine connected in series to form a working fluid circulation loop; the feedwater of the low-pressure feedwater heater group flows through the cold side of the low-pressure cooler group; the extraction steam output end of the intermediate-pressure cylinder, the hot side of the high-pressure heater group, and the hot side of the high-pressure feedwater heater group are connected in sequence, and / or, the extraction steam output end of the high-pressure cylinder, the hot side of the high-pressure heater group, and the hot side of the high-pressure feedwater heater group are connected in sequence.

The invention provides a nuclear power unit loop high-pressure water supply system and a flushing method thereof.The nuclear power unit loop high-pressure water supply system comprises a high-pressure water supply heater system, a steam generator main water supply system, a start and stop water supply system and a pipe assembly, and the pipe assembly comprises at least one first inlet and at least one first outlet; at least the outlet of the steam generator main water supply system is communicated with the first inlet, and the first outlet is used for being communicated with a conventional island waste liquid collecting system of the nuclear power unit, so that a flushing medium flowing out of the nuclear power unit loop high-pressure water supply system can flow into the conventional island waste liquid collecting system; the tube assembly is a permanent tube assembly. Impurities generated by flushing the high-pressure water supply system of the nuclear power unit loop can be discharged into a conventional island waste liquid collecting system through the pipe assembly and do not circularly flow in the high-pressure water supply system of the nuclear power unit loop, so that the probability that the impurities block a filter screen of equipment can be reduced.

The present invention relates to a thermal power unit coupled with molten salt energy storage deep peak regulation system and method thereof, wherein the system comprises: a circulating power generation mechanism, comprising a steam turbine unit and a waste heat utilization device, wherein the steam generated by the waste heat utilization device enters the steam turbine unit to perform work and generate electricity, and the waste heat utilization device comprises a feed water heater; a molten salt energy storage mechanism, comprising an energy storage component, an electrically heated molten salt heater, a molten salt bypass pipe, an electrically heated steam superheater, a steam bypass pipe, a high-temperature molten salt storage tank, a high-temperature molten salt pump, a high-pressure steam superheater, a high-pressure steam generator, a low-pressure steam superheater, a low-pressure steam generator and a first feed water pump. The technical solution of the present invention enables the flue gas waste heat to heat the molten salt in multiple stages for energy storage, and at the same time enables the high-temperature molten salt heat to heat the feed water in multiple stages to produce steam of different qualities, thereby realizing the step-by-step efficient utilization of the high-temperature flue gas waste heat and the high-temperature molten salt heat, reducing irreversible losses, and in addition, with the aid of electric heating, increasing the output of high-quality steam.

The invention provides a nuclear energy steam supply system based on a heat pipe reactor, the nuclear energy steam supply system comprises a first transportation mechanism, a second transportation mechanism and a third transportation mechanism, the first transportation mechanism is provided with a reactor, an evaporator and a superheater, and the evaporator and the superheater are respectively connected with one reactor; a steam conversion system is arranged on the second conveying mechanism, and a feed water pump and a feed water heater are arranged on the third conveying mechanism; the first pipeline sequentially flows through the evaporator, the superheater, the steam conversion system, the feed water heater and the feed water pump to return to the evaporator; the second pipeline flows through the steam conversion system and is used for exchanging heat with the first pipeline to generate steam for a user side to use. Compared with a traditional reactor, the steam supply system disclosed by the invention can be moved to a user side, so that the steam transportation path is greatly shortened, and the steam quantity and the temperature loss can be greatly reduced.

The present invention discloses a steam-electric coupled molten salt heat storage and peak-shaving system for a thermal power unit and its operating method. The system includes a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a condenser, a condensing pump, a low-pressure heating unit, a feedwater pump, a high-pressure heating unit, a generator, a molten salt cold tank, a low-temperature molten salt pump, a steam cooler, a bypass regulating valve, a molten salt electric heater, a molten salt hot tank, a high-temperature molten salt pump, and a feedwater heater. The present invention reduces the amount of electricity consumed by the unit through steam extraction and electricity consumption. It can store heat in large capacity, for a long time, and at low cost, achieving deep peak-shaving of the unit. At the same time, the stored heat energy heats the boiler feedwater, reducing high-pressure steam extraction and reducing the unit's heat consumption, thus achieving good economic benefits.

The present invention relates to the field of power generation technology, and specifically relates to a power generation system that utilizes flue gas compression for pressure storage, including: the steam inlet end of the feedwater heater is connected to the steam extraction end of the steam turbine; the flue gas compressor is connected to the boiler flue gas outlet; the steam inlet of the first heat exchanger is connected to the flue gas compressor, and the water inlet end of the first heat exchanger is connected to the pipeline between the condenser and the feedwater heater; the first heat exchanger uses the flue gas transported by the flue gas compressor to heat the condensate water of the condenser to form pressurized water; the water inlet of the pressure vessel is connected to the water outlet end of the first heat exchanger; the water outlet of the pressure vessel is connected to the pipeline between the feedwater heater and the boiler; the pressure vessel has a pressure storage state for storing pressurized water; and a pressure release state for releasing pressurized water into the boiler; this application utilizes flue gas compression for pressure storage to achieve deep peak shaving; uses feedwater to absorb the heat of the flue gas to improve the thermal efficiency of the boiler; and realizes rapid load change to meet the peak shaving and frequency modulation requirements after renewable energy is connected to the power grid.

The invention belongs to the technical field of energy storage systems, and particularly relates to an efficient zero-carbon gas turbine energy storage system and a using method. The system comprises a silicon-based ultrahigh-temperature heat storage device; an outlet of the silicon-based ultrahigh-temperature heat storage device is connected with a combustion chamber, and an inlet is connected with a gas compressor; an outlet of the combustion chamber is connected with a gas turbine, an outlet of the gas turbine is connected with a waste heat boiler, an outlet of the waste heat boiler is connected with a steam turbine and a feed water heater, an outlet of the steam turbine is connected with a condenser and a magnesium-based solid hydrogen storage device, and an outlet of the magnesium-based solid hydrogen storage device is connected with the combustion chamber and the steam turbine. And the other inlet of the magnesium-based solid hydrogen storage device is connected with an electrolytic hydrogen production device. The silicon-based ultrahigh-temperature heat storage device and the magnesium-based solid hydrogen storage device are combined, abandoned electricity or valley electricity is converted into high-grade heat energy and hydrogen energy, then the efficient zero-carbon energy storage function is achieved through gas-steam combined cycle thermoelectric conversion, and the electricity-electricity energy storage round-trip efficiency can reach 60%.

The invention provides a nuclear power unit loop low-pressure water supply system and a flushing method thereof.The nuclear power unit loop low-pressure water supply system comprises a condensed water extraction system, a low-pressure water supply heater system, a water supply deaerator system and a first pipe assembly, a first outlet of the first pipe assembly is used for being communicated with a conventional island waste liquid collecting system of a nuclear power unit, and at least the water supply deaerator system is communicated with the first pipe assembly through a first inlet. The first pipe assembly is used for enabling flushing media flowing out of the condensed water extraction system, the low-pressure feed water heater system and the feed water deaerator system to flow into the conventional island waste liquid collection system through the first pipe assembly; the first tube assembly is a permanent tube assembly. Impurities generated in the flushing process of the condensed water extraction system, the low-pressure feed water heater system and the feed water deaerator system can be discharged into the conventional island waste liquid collection system through the first pipe assembly, the impurities do not circularly flow in the low-pressure feed water system of the nuclear power unit loop, and the probability that the impurities block an equipment filter screen can be reduced.

This invention provides a heating system and control method for a high-temperature gas-cooled reactor (HTGR) nuclear power plant. The HTGR heating system includes: a HTGR nuclear island, a turbine generator set, a steam generator, a primary superheater, a secondary superheater, a heating mains, a user end, a feedwater preheater, a feedwater inlet, a deaerator, a feedwater heater, a feedwater pump, and a condenser. This invention fully utilizes the main steam from the HTGR nuclear island and the extracted steam from the turbine generator set as the heating steam source for the primary and secondary superheaters of the external heating system, producing externally supplied heating steam. Based on the operating status of the HTGR nuclear island, the heating system is controlled to adopt different operating modes, thereby achieving coordinated operation of power generation and heating. This provides high flexibility, high reliability, and good safety, and helps alleviate the pressure of carbon emissions from industrial heat consumption.

The present invention relates to a deep peak regulation system of a heating unit coupled with molten salt energy storage and a method thereof, wherein the system comprises: a circulating power generation mechanism, comprising a steam turbine unit and a waste heat utilization device, wherein the steam generated by the waste heat utilization device enters the steam turbine unit to perform work and generate electricity, and the waste heat utilization device comprises a feed water heater; a molten salt energy storage mechanism, comprising an energy storage component, a high-pressure steam generator, a low-pressure steam generator, a feed water reheater, a first feed water pump, a heat network heat exchanger, a high-pressure steam user, a medium-pressure steam user, a first steam temperature reduction and pressure reduction device, a steam pressure matcher, an industrial steam supply pipe and a molten salt bypass pipe. The technical solution of the present invention realizes the high-efficiency utilization of flue gas waste heat and high-temperature molten salt heat in a stepped manner, greatly reduces the irreversible loss caused by excessive heat exchange temperature difference, reduces the work capacity loss of high-parameter steam, and has significant economic benefits.

The invention relates to the technical field of feed water heater model calibration, aims to solve the problems that results vary from person to person, efficiency is low and calibration precision is poor under multiple working conditions in a traditional manual calibration mode, and discloses a multi-working-condition intelligent calibration method for a nuclear power plant feed water heater model. A feed water heater model and an intelligent optimization algorithm are transformed and integrated, data interaction between the model and the optimization algorithm is opened, standardized calibration of a single working condition is performed, the state of the model is initialized and the performance of the model is calibrated by using reference data of a single working condition one by one based on a mechanism and experience, and intelligent calibration of multiple working conditions is performed. And carrying out multi-working-condition calibration on the basis of a calibration result by adopting a population optimization method, and outputting steady-state data under each working condition. According to the method, the multi-working-condition weighted error of the model is further optimized by using a group optimization method, the calibration precision is improved, the number of optimization iterations can be greatly reduced, and the optimization efficiency is remarkably improved.

The present invention relates to the field of power generation technology, and specifically to a power generation system utilizing flue gas compression energy storage, comprising: a boiler, a steam turbine, a condenser, and a feedwater heater connected in sequence; the steam inlet of the feedwater heater is connected to the steam extraction end of the steam turbine; the flue gas compressor is connected to the flue gas outlet of the boiler and is electrically connected to a generator; the air inlet of a heat storage tank is connected to the flue gas compressor, the water inlet of the heat storage tank is connected to the water outlet of the condenser, and the water outlet of the heat storage tank is connected to the water inlet of the feedwater heater; a heat exchange structure and a heat storage medium are provided in the heat storage tank. The heat storage tank utilizes the flue gas compressed and transported by the flue gas compressor to heat the heat storage medium; and heats the condenser outlet water through the heat exchange structure and transports it to the water inlet of the feedwater heater; the present application utilizes flue gas compression to store heat and energy, utilizes the flue gas compressor to consume the electrical energy of the generator, and the heat storage medium absorbs and stores the heat of the flue gas compression; reduces boiler exhaust loss, improves boiler thermal efficiency, expands the load variation range, and increases the load variation rate.

The invention belongs to the cross technical field of a nuclear fusion energy technology and a heat-work conversion system, and provides a nuclear fusion Rankine cycle structure integrating divertor heat recovery, which comprises a primary side heat collection module and a secondary side heat-work conversion module, the heat-power conversion module comprises a steam generator, a first valve, a high-pressure turbine, a dehumidifier, a reheater, a low-pressure turbine, a condenser, a first water pump, a first feed water heater, a second feed water heater, a deaerator, a second water pump, a third feed water heater and a preheating heat exchanger which are sequentially connected through pipelines; the preheating heat exchanger preheats secondary side supplied water before entering the steam generator through heat of the divertor. And the outlet water temperature of the third feed water heater is matched with the temperature of the preheating heat exchanger by adjusting the inlet steam extraction flow of the third feed water heater. According to the structure, gradient utilization of nuclear fusion heat is achieved, and irreversible loss in the heat exchange process is reduced.

To provide a control system of nuclear power plant capable of precisely controlling the target water supply temperature, a control method of nuclear power plant, and a nuclear power plant.SOLUTION: The control system of a nuclear power plant controls a nuclear power plant including: a nuclear reactor; a condenser that converts steam generated in the nuclear reactor back into water: a feedwater heater that heats the water returned by the condenser; and a piping located downstream of the condenser and upstream of the feedwater heater or a drain pump that returns drain water from the feedwater heater to the equipment. The control system also includes: a feedwater temperature control unit that controls the feedwater temperature of the feedwater heater; and a target water supply temperature setting unit that outputs a water supply temperature command value. The feedwater temperature control unit controls the pump output of the drain pump based on the water supply temperature command value and the water supply temperature measurement value.SELECTED DRAWING: Figure 1