19 results about "Feedwater heater" patented technology

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 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 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 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 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.

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 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%.

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 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.

The utility model relates to the technical field of acid-making heat energy recovery, in particular to a device for improving the high-pressure steam production rate of a sulfuric acid device. A flue gas outlet of the high-temperature absorption tower is connected with a flue gas inlet of the flue gas heater, a flue gas outlet of the flue gas heater is connected with a cold side inlet of the cold-hot heat exchanger, a hot side flue gas outlet of the cold-hot heat exchanger is connected with a flue gas inlet of the economizer, and a flue gas outlet of the economizer is connected with a flue gas inlet of the high-temperature absorption tower. A cold-side high-pressure feed water outlet of the economizer is connected with the high-pressure waste heat boiler, the high-pressure waste heat boiler generates high-pressure steam, and an acid-side inlet of the flue gas heater is connected with an acid-side outlet of the high-temperature absorption tower and / or an acid-side outlet of the low-pressure feed water heater. And an acid side outlet of the flue gas heater is connected with an acid side inlet of the low-pressure feed water heater and / or other process equipment. Compared with the prior art, the heat is transferred to the high-pressure steam system to increase the high-pressure steam yield while low-pressure steam output is guaranteed.

This invention discloses an energy recovery system and method suitable for low-load wet operation of an ultra-supercritical boiler, comprising: a water storage tank, an atmospheric expansion tank, a heat accumulator, a thermal oil storage tank, a feedwater heater, a steam-water separator, a feedwater pump, a deaerator, and an ultra-supercritical boiler. The ultra-supercritical boiler and the water storage tank form a loop. The water storage tank is also connected to the atmospheric expansion tank and a condensate tank in sequence via pipelines. A branch pipeline between the water storage tank and the atmospheric expansion tank is connected to the heat accumulator. The heat accumulator, the thermal oil storage tank, and the feedwater heater form a loop on their heat source sides. The inlet of the feedwater heater on its feedwater side is connected to the deaerator via the feedwater pump, and the outlet of the feedwater heater on its feedwater side is connected to the ultra-supercritical boiler via a high-pressure regenerative heater group. This energy recovery system and method can effectively recover heat from saturated condensate, improve the operating efficiency of the ultra-supercritical boiler, and improve the denitrification efficiency of the denitrification equipment under low load.

To provide a power plant having a large synergistic effect by combining a solid polymer type water electrolysis device, a steam turbine plant, and a gas turbine cycle by hydrogen / oxygen combustion.SOLUTION: A section on a feed water pipeline of a steam turbine plant corresponding to pressure and temperature conditions of a gas turbine and a solid polymer type water electrolysis device is selected, a feed water circulation path including the solid polymer type water electrolysis device and a feed water heater is provided, and heat generated by water electrolysis of the solid polymer type water electrolysis device is absorbed by the feed water heater and used for heating boiler feed water.SELECTED DRAWING: Figure 1

This utility model relates to the field of coal chemical technology, and more particularly to a steam self-balancing dual isothermal converter system. In the steam self-balancing dual isothermal converter system, the mixed gas pipeline of water-gas and steam is connected to the mixed gas inlet of a medium-temperature heat exchanger; the mixed gas outlet of the medium-temperature heat exchanger is connected to the upper inlet of the first-stage isothermal converter; the lower outlet of the first-stage isothermal converter is connected to the converter gas inlet of the medium-temperature heat exchanger; the converter gas outlet of the medium-temperature heat exchanger is connected to a quencher; the converter gas outlet of the quencher is connected to a second-stage isothermal converter; the lower outlet of the second-stage isothermal converter is connected to a medium-pressure boiler feedwater heater; the converter gas outlet of the medium-pressure boiler feedwater heater is connected to a low-pressure boiler feedwater heater; and the converter gas outlet of the low-pressure boiler feedwater heater is connected to a converter gas output pipeline. This utility model can increase boiler water temperature and increase steam production without the need for external steam addition.

The invention discloses a system for increasing the high-pressure steam yield in the sulfur acid making process and a using method, and relates to the technical field of sulfur acid making. The system comprises a low-temperature heat recovery tower, a low-pressure steam generation unit, a diluter, a high-pressure boiler feed water heater, a conversion system and a steam recycling unit; the heat source is low-pressure steam by-produced by the low-pressure steam generation unit and is used for heating combustion-supporting air entering the sulfur burning furnace and flue gas entering the conversion system; and the high-pressure steam generation equipment is connected with the sulfur burning furnace and is used for receiving high-pressure boiler feed water preheated by the high-pressure boiler feed water heater and the economizer of the conversion system and generating high-pressure saturated steam. And heat energy is wasted.

The utility model relates to a coal power unit. Coal power unit, include: boiler, heat circulation system, back pressure machine and feedwater heater, the steam output end of boiler is connected with the steam input end of back pressure machine and the steam input end of heat circulation system respectively, the steam output end of back pressure machine is connected with the steam input end of feedwater heater, to steam output to feedwater heater, the feedwater output end of heat circulation system is connected with the feedwater input end of feedwater heater, to feedwater output to feedwater heater, the feedwater output end of feedwater heater is connected with the feedwater end of boiler, to steam heated after the feedwater output to boiler. Adopt the utility model can reduce coal power unit coal consumption.

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.

This invention discloses a peak-shaving system and method for coal-fired power units that couples thermal storage and high-pressure cylinder zero-output, relating to the field of peak-shaving technology for coal-fired power units. It aims to solve the technical problem of poor peak-shaving capacity in existing coal-fired power units. The system includes a coal-fired power generation system and a thermal storage system. The coal-fired power generation system includes a boiler and a steam turbine connected to the boiler, with a heater connected to the steam turbine. The thermal storage system includes a molten salt steam cooler, which is further connected to a molten salt steam condenser and a molten salt steam subcooler. It also includes a heat release system, which includes a molten salt steam generator and a molten salt feedwater heater. The molten salt steam generator is connected to a high-temperature hot salt pump, and the molten salt feedwater heater is connected to a low-temperature hot salt pump. The invention also includes a corresponding peak-shaving method. This invention can broaden the peak-shaving range of coal-fired power units and improve their ramp-up rate.

The utility model relates to a coal power unit. The coal power unit comprises a boiler, a thermodynamic cycle system, a unit load adjusting device and a feed water heater. The first end of the boiler is connected with the first end of the thermodynamic cycle system, the second end of the thermodynamic cycle system is connected with the first input end of the feed water heater, and the output end of the feed water heater is connected with the second end of the boiler; the input end of the unit load adjusting device is connected with the first end of the boiler and the first end of the thermodynamic cycle system, and the first output end of the unit load adjusting device is connected with the second input end of the feed water heater. By adopting the coal power unit provided by the invention, the coal consumption can be reduced.