407 results about "Cogeneration" patented technology

The invention relates to the technical field of hydrogen load capacity configuration, in particular to a multi-scene hydrogen load comprehensive energy system double-layer capacity optimal configuration method, which comprises the following steps of: firstly, constructing a multi-scene model containing strong, weak, discontinuous and non-hydrogen loads based on the time sequence characteristics of hydrogen loads in an industrial park; then a comprehensive energy system mathematical model covering wind and light power generation, hydrogen energy conversion, multi-type energy storage and cogeneration units is established; then, constructing a double-layer capacity optimization configuration model of which the upper layer takes the whole life cycle cost minimization and the lower layer takes the operation cost minimization and the system stability optimization as targets; and finally, solving a Pareto leading edge by adopting a non-dominated sorting genetic algorithm with an elitist strategy, making a decision by utilizing an approximate ideal solution sorting method, and screening out a capacity configuration scheme with optimal comprehensive performance. The problem that a traditional configuration scheme is difficult to adapt to multi-scene hydrogen load fluctuation is effectively solved, and the economical efficiency, the stability and the renewable energy consumption capacity of the system are remarkably improved.

The invention discloses a high-pressure combustion combined heat and power generation energy storage system and method for hydrogen and oxygen production through electrolysis, and relates to the field of hydrogen energy storage. After the electrolytic cell produces high-pressure hydrogen and oxygen, the high-pressure hydrogen and oxygen are stored in the hydrogen / oxygen storage tank, the system can operate in a hydrogen / oxygen mode, and in the oxygen mode operation, the hydrogen and oxygen steam mixed gas from the oxygen storage tank and the hydrogen / oxygen evaporation compressor are combusted in the high-pressure combustion chamber to generate superheated steam, and then the superheated steam enters the expansion turbine to do work; due to excessive oxygen, dead steam after acting is separated into two working media through a gas-liquid separator, that is, gas enters a cooler to be cooled and then returns to a combustion chamber through a hydrogen / oxygen evaporation compressor, drainage water generated after liquid enters a heat supply heat exchanger is pressurized through a water pump and then enters a high-temperature combustion chamber, and therefore clean utilization of hydrogen energy and cyclic regeneration of the working media are achieved. The system can realize high power generation efficiency and excellent environmental protection performance, and is suitable for regions requiring stable consumption of fluctuating renewable energy sources, power and heat supply and the like.

The utility model provides a peak-shaving steam supply system for deep waste heat utilization of a thermoelectric unit, which deeply recovers cold end waste heat and flue gas waste heat of a cogeneration unit, is coupled with a two-stage compression heat pump, extracts waste heat to heat demineralized water, and serves as a primary heat source for supplying industrial steam, so that the waste heat participates in external heat supply; the superheater utilizes the generating capacity of the unit to enable industrial steam to reach steam supply parameters, the waste heat of the unit and the generating capacity are combined for external steam supply, the circulating heat efficiency is improved, the steam supply capacity is improved, meanwhile, the on-grid electricity is reduced, thermoelectric decoupling is achieved, the unit adjusting operation interval is expanded, the operation cost and pollutant emission are reduced, and peak regulation or spot transaction earnings are improved. And a clean, low-carbon, flexible, efficient, economical and energy-saving combined heat and power generation system is constructed.

The invention discloses a multi-time-scale park integrated energy system distribution robust optimization scheduling method, which comprises the following steps of: constructing an electric heating collaborative system model taking a combined heat and power generation unit as a core, and introducing a carbon transaction mechanism; constructing a confidence set in combination with a 1-norm and an infinity-norm, and respectively making a robust start-stop plan and a flexible operation strategy in day-ahead and intra-day two-stage scheduling; a column and constraint generation algorithm is adopted to decompose the constructed day-ahead and intra-day two-stage model into a main problem and a sub-problem for repeated iterative solution, and an optimal scheduling scheme with both economical efficiency and robustness is obtained. According to the method, the uncertainty of new energy prediction is fully considered, and the coping of the park to the randomness of the new energy can be better played through processing of different time scales.

The invention provides a cogeneration unit peak regulation capability evaluation method, which comprises the following steps: firstly, constructing a thermodynamic system mathematical model, solving system coupling parameters under a deep peak regulation working condition through a multi-layer iterative loop architecture, and generating a multi-working-condition data set which covers a full working condition and meets physical consistency; secondly, deducing a linear qualitative relation equation of the power, the main steam flow and the heat supply steam extraction flow, preprocessing a data set, training a pure data driving model as a performance reference, introducing the linear qualitative relation equation as a physical constraint item into a loss function, and constructing and training a PINN; and finally, the rated boundary condition of the peak regulation capacity is determined, a thermal characteristic curve is obtained through PINN simulation, the peak regulation capacity range and the real-time peak regulation margin under different heat supply requirements are calculated, and the result is transmitted to a power system dispatching platform. According to the method, the all-working-condition peak regulation evaluation precision and reliability can be improved, and the flexibility and universality of the model are enhanced.

The invention provides a combined heat and power system and a control method thereof, and relates to the technical field of combined heat and power. The system comprises a fuel gas heat and power cogeneration subsystem, a heat supply subsystem and a fused salt heat storage subsystem, the fuel gas heat and power cogeneration subsystem is used for fuel gas power supply, the fused salt heat storage subsystem can convert solar energy and / or flue gas generated by power supply into heat energy of high-temperature fused salt to be stored, and the heat supply subsystem conducts primary heating on heat supply return water through geothermal energy; and flue gas and / or high-temperature fused salt generated by power supply are / is used for conducting secondary heating on heat supply return water. Geothermal energy, solar energy and fused salt heat storage are coupled, and renewable energy sources are fully utilized for heat and power cogeneration, so that the power supply requirement and the heat supply requirement of a user are met. In the ground source heat pump unit, primary heating is conducted through geothermal energy, heat supply return water is heated into warm water, then the warm water is secondarily heated into hot water through smoke in the gas heat and power cogeneration system, the compression ratio of a compressor in a ground source heat pump can be reduced, and power consumption of the compressor is reduced.

The invention discloses a gas power plant combined heat and power generation real-time optimization method based on SIS data. The method comprises the steps of obtaining real-time SIS data of a gas power plant; based on the real-time SIS data and the historical SIS data, a dynamic safe operation boundary matched with the current operation condition is dynamically determined through an unsupervised learning algorithm, and the dynamic safe operation boundary is a variable constraint set representing the safe operation limit of gas power plant equipment and changing along with operation condition parameters; and by taking the dynamic safe operation boundary as a constraint condition of optimization solution, generating an operation control instruction for controlling the operation of the cogeneration unit. The safety boundary matched with the operation condition is dynamically identified through an unsupervised learning algorithm, and real-time optimization is performed by taking the safety boundary as a constraint, so that the conservative property of a traditional fixed boundary method is effectively overcome, and the economical efficiency of cogeneration operation is remarkably improved on the premise of ensuring the safety of a unit.

The embodiment of the invention provides a flywheel direct-driven cogeneration unit dynamic adjusting system and a control method thereof, in the embodiment of the invention, a magnetic suspension technology is adopted to eliminate friction of a traditional mechanical bearing, and quick starting and stopping of the rotating speed of a flywheel are realized; the high-temperature superconducting magnetic clutch achieves instantaneous mechanical coupling / decoupling of the flywheel and the circulating pump through the zero resistance characteristic, and the response time is short. The frequency modulation requirement of a new energy power grid can be matched, and meanwhile hard constraint of thermal load fluctuation on electric energy output is avoided. The mechanical direct-drive path directly utilizes the kinetic energy of the flywheel to drive the circulating pump, so that a multi-stage energy conversion link in a traditional mode is omitted; the electric adjusting path realizes bidirectional power exchange between the flywheel and a power grid through an energy interface device, and the loss of an inverter is reduced; and the high-temperature superconducting magnetic clutch realizes zero-energy-loss transmission in a coupling state. The magnetic suspension flywheel set adopts a non-contact suspension technology, so that mechanical wear is eliminated; the high-temperature superconducting magnetic clutch achieves non-contact transmission through magnetic coupling, and friction loss is avoided.

The invention discloses a spray cooling intelligent management and control system optimization algorithm for a 330MW cogeneration unit, and relates to the technical field of thermal equipment cooling, and the algorithm comprises the steps: obtaining unit operation parameters, environment meteorological data, a spray system state and resource price information, and forming multi-source synchronous input data; on the basis of multi-source synchronous input data, feasibility judgment is carried out according to preset temperature, load and water source conditions, and a spraying enable signal is output; based on historical unit operation data, optimizing a time sequence prediction model constructed by hyper-parameters through a genetic algorithm, in response to the spray enable signal, performing rolling prediction on the saturation temperature of the condenser by using the time sequence prediction model in combination with a candidate spray strategy to obtain a temperature change sequence; according to the temperature change sequence, power generation benefit increment is calculated in combination with thermal characteristics of the steam turbine, spraying energy consumption and water consumption cost are deducted, and an optimization function is constructed; on the basis of the optimization function, supercooling prevention, condensation prevention, amplitude limiting execution and water source total amount limitation are embedded as hard constraint conditions.

The system comprises a power generation system and a heat supply system, the power generation system comprises a boiler, a carbon dioxide turbine, a heat regenerator, a precooler, a compressor and a motor generator, an outlet of the boiler is connected with an inlet of the turbine, an outlet of the turbine is connected with a hot side inlet of the heat regenerator, and an outlet of the compressor is connected with a hot side inlet of the precooler. An outlet of the precooler is connected with an inlet of the compressor, an outlet of the compressor is connected with a cold-side inlet of the heat regenerator, a cold-side outlet of the heat regenerator is connected with an inlet of the boiler, and the compressor and the turbine are respectively connected with the motor generator. The heat supply requirement can be met, complete thermoelectric decoupling is achieved, and the flexibility of the supercritical carbon dioxide cycle generator set is fully exerted while stable heat supply is achieved.

The application provides a geothermal water cascade utilization based combined production system and method of heat, electricity and helium, which comprises, in sequence, a geothermal exploitation pretreatment unit, a thermal energy cascade utilization unit, a water-soluble helium gas purification and storage unit, a tail water reinjection unit and a valve control unit, wherein the valve control unit is provided with valve groups matched with the units according to functions. According to the application, the geothermal exploitation pretreatment unit, the thermal energy cascade utilization unit, the water-soluble helium gas purification and storage unit and the tail water reinjection unit are connected in sequence to realize the collaborative operation of the geothermal water cascade utilization and the water-soluble helium extraction. The valve control unit matched according to functions and the system interlocking control logic are provided to provide a targeted control structure for each process unit, realize the accurate control of process parameters and the flexible switching of working conditions, provide a structural basis for the online maintenance of subsequent equipment and the recycling of helium extraction, improve the overall operation stability of the system and improve the comprehensive utilization efficiency of geothermal resources and water-soluble helium resources.

The invention discloses an electric-thermal coupling system cooperative load recovery method and system considering electric vehicle aggregation charging and discharging. The method comprises the following steps: step 1, establishing an objective function with the minimum load loss amount of the electric-thermal integrated energy system; 2, constructing an electric-thermal coupling system collaborative load recovery model, wherein the model comprises load recovery stage network topology constraint, power system steady-state operation constraint and regional heat supply system steady-state operation constraint; and step 3, solving by using an interior point method to obtain output of a power distribution network, a regional heat supply system network topology, a transformer substation, a distributed power supply and a cogeneration unit in the electric-thermal coupling system. The method provided by the invention can be practically applied to formulating a toughness improvement strategy of the park-level electro-thermal coupling system, fully exploits the flexibility of an electric vehicle cluster, reduces the overall load loss amount of the system, enhances the ability of the system to cope with sudden faults, and ensures the safe and stable operation of the system.

The utility model provides a combined heat and power supply air supply system of a fuel cell, which utilizes a byproduct high-pressure pure oxygen generated by hydrogen production through water electrolysis as a working fluid, realizes air humidification and cyclic utilization of electric pile waste gas through combination of an injection device and an air compressor branch, reduces the use of a humidifier and an intercooler, and reduces the complexity and air flow resistance of the system. The system comprises an air inlet main path, an oxygen inlet branch path, an air inlet branch path and an injection device, waste oxygen is introduced into the oxygen inlet branch path, the air inlet branch path is provided with an air compressor, and the injection device mixes the waste oxygen and fresh air and supplies the mixed waste oxygen and fresh air into a galvanic pile. The air outlet pipeline is connected with the water segregator, waste gas is recycled to humidify fresh air, and a backflow adjusting valve is arranged. The system reduces the power consumption of the air compressor and improves the cogeneration efficiency of the fuel cell.

The invention relates to the technical field of flue gas recovery, and discloses a flue gas waste heat recovery device for combined heat and power generation, which comprises an energy conversion mechanism positioned in a main fixed rack, and is matched with an input tank body, a three-way input pipe and an assembly rack for contacting sucked flue gas; the heat exchange dissipation mechanism is located in the fixing shell and used for dissipating heat generated by the electronic element. The wind driven generator is located in the fixing shell and matched with the output shaft for wind power generation. By means of the liquid storage pool and the filter plate structure, heat energy in high-temperature flue gas is transmitted through contact of water and flue gas, water is heated, and therefore the heat energy is recycled, waste heat resources of the flue gas are fully utilized through the design, the heat energy utilization efficiency is improved, flow of the high-temperature flue gas drives turbofan blades to rotate, then the output shaft is driven to rotate, and the heat energy utilization efficiency is improved. Energy is converted into electric energy through the wind driven generator, the kinetic energy of the waste smoke can be directly converted into the electric energy, and an effective combined heat and power generation mode is formed.

The application relates to a combined heat and power system, which comprises a boiler, a generator unit, a molten salt heat storage subsystem and a steam heat storage subsystem; the generator unit comprises a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder; the molten salt heat storage subsystem comprises a cold salt tank, a hot salt tank, a heat storage heat exchanger and a heat supply heat exchanger, the heat storage heat exchanger is provided with a first low-temperature medium flow channel and a first high-temperature medium flow channel, the heat supply heat exchanger is provided with a second low-temperature medium flow channel and a second high-temperature medium flow channel; the first high-temperature medium flow channel is connected with a steam extraction end of the medium-pressure cylinder; one end of the second low-temperature medium flow channel is connected with a water supply end, and the other end is connected with a heat user; the steam heat storage subsystem comprises a steam heat storage tank, an input end of the steam heat storage tank is connected with the steam extraction end of the medium-pressure cylinder, an output end is connected with a steam inlet end of the low-pressure cylinder, and the steam heat storage tank has the advantages of being able to meet different scheduling requirements and increasing the flexibility of scheduling.

The invention discloses a hydrogen fuel cell heat and power cogeneration system for zero-carbon energy supply of a building, and the system comprises a fuel cell power generation module which is used for receiving high-purity hydrogen as a fuel and generating direct current through electrochemical reaction so as to supply power to an electric load of the building. And the heat recovery and heat supply module is used for recovering heat generated in the operation process of the fuel cell power generation module so as to supply heat to a building heat load. And the hydrogen supply module is connected with the fuel cell power generation module and is used for providing hydrogen required by the fuel cell power generation module. And the intelligent energy management module is used for monitoring electric / thermal load requirements in real time and dynamically adjusting the output power of the fuel cell power generation module. The method has the advantages that zero carbon emission can be realized; the energy is efficiently utilized; the modular design supports flexible expansion from kW level to hundred kW level, and adapts to different building scales; the system has the capabilities of automatic start and stop, load following and grid-connected / off-grid switching; the environment adaptability is high; and the technology maturity is high, and a large-scale deployment basis is provided.

The invention provides a novel system for efficiently carrying out heat-work conversion by taking liquid ammonia / water as a circulating working medium, low-grade sensible heat can be recovered, latent heat is recovered by using an ammonia compressor to compress and heat a circulating working medium gasification heat source, and the heat-work or thermoelectric conversion efficiency is greatly improved. According to the invention, the liquefied latent heat of the working medium is effectively utilized as an internal heat source for circulating gasification, the economic and technical bottleneck of low efficiency of implementing low-grade thermoelectricity or heat-work conversion in the existing combined heat and power generation or ammonia working medium is well broken, the energy consumption and the working medium circulation amount can be greatly reduced, and the method has wide popularization and application values and is worthy of popularization and application. And greater economic and social environmental protection benefits can be created, and energy conservation and emission reduction are greatly realized.

The present application relates to the technical field of energy utilization, and particularly to a combined heat and power generation system capable of efficiently and flexibly heating by means of dual-unit combined supply, comprising a high backpressure unit and a conventional unit, and further comprising a first-stage heating unit, a second-stage heating unit, a third-stage heating unit, and a fourth-stage heating unit. In the present application, four stages of different heating units are provided and are simultaneously communicated with a conventional backpressure unit and the high backpressure unit, and a low-pressure cylinder crossover pipe heating mode and a low-pressure cylinder zero-output heating mode are flexibly selected on the basis of the total steam consumption demand of the third-stage and fourth-stage heater in combination with the real-time electric load condition of the conventional backpressure unit, so that the heating load of the units can be adjusted more flexibly; and when an electric load is determined, the external heating loads of the conventional and high backpressure units can fluctuate between -50% and +50%, and a high thermal-electric decoupling capability is realized.

Arrangement (1) for pasteurizing and subsequently separating solids from a slurry containing solid and liquid components, comprising: • a heating device (2) for heating the slurry containing solid and liquid components, • a storage container (5) for the slurry upstream of the heating device (2), namely a biogas plant, • a pasteurization device (3) downstream of the heating device (2) for pasteurizing the slurry containing solid and liquid components, • a pressing device (4), preferably a screw press separator, further downstream for separating the solids from the previously pasteurized slurry, • a combined heat and power plant (7) that can be operated by burning a gas phase (6), preferably biogas, escaping from the slurry stored in the storage container (5), wherein the heating device (2) for heating the slurry is designed to utilize at least part of the waste heat from the combined heat and power plant (7).and• a gassing vessel (8) for directly heating the slurry contained therein by direct supply and / or dispersion of a waste heat stream (13), namely a hot exhaust gas stream, from the combined heat and power plant (7) into the slurry.

The invention discloses a renewable energy driven coupling heat and power cogeneration system and an operation method thereof. Geothermal water resources are utilized in a gradient mode according to a temperature interval, and hot water exploited from a geothermal well is filtered and then drives an organic Rankine cycle system to generate power; geothermal water subjected to heat exchange through the evaporator is used for resident heating, heating return water preheats an organic working medium through a preheater of the organic Rankine cycle system, and therefore the power generation efficiency of the system is improved. Geothermal water passes through the preheater and then enters a floor heating pipeline to be used for floor heating heat supply of residents. The maximum circulation heat efficiency and efficiency of the two organic Rankine cycles can be achieved through circulation organic working medium screening and operation parameter optimization; through combination of power generation and heating, the comprehensive utilization efficiency of system energy is improved; and meanwhile, in combination with heat using scenes such as a constant-temperature swimming pool and wetland restoration, waste heat resources of floor heating return water and hot water at an outlet of the condenser are recycled, and maximum waste heat recovery of the system is achieved.

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 provides a multi-energy system dynamic carbon factor calculation method and device based on an analysis method. The invention belongs to the technical field of low-carbon operation and carbon emission metering of an integrated energy system. The method provided by the invention comprises the following steps: respectively calculating the loss of a cogeneration unit and the loss of an electric boiler; the carbon emission responsibility of the output energy flow of the cogeneration unit is obtained, and the carbon emission responsibility of the output energy flow of the electric boiler is obtained; determining the electric energy carbon emission responsibility and the heat energy carbon emission responsibility of the output energy flow of the cogeneration unit; and determining a carbon emission factor of an electric end and a carbon emission factor of a hot end under the influence of wind curtailment and light curtailment of the system, and dynamically adjusting the output of each device in the system by taking the minimization of the total carbon emission of the system as a target. According to the method, loss of a conversion link is accurately metered in an electricity, heat and gas coupling scene, loss carbon emission is reasonably shared according to energy quality difference and each output energy flow proportion, and a dynamic carbon emission factor which can be used for system optimization regulation and control and emission management is generated.

This invention relates to the field of solid waste resource utilization and clean energy technology, specifically providing a cogeneration system and method based on pure combustion of extremely low calorific value coal gangue. The system includes a pretreatment unit, a pure combustion and activation unit, an alumina extraction unit, an energy recovery unit, and a resource utilization unit connected in sequence. The core of the method lies in: feeding extremely low calorific value coal gangue with a calorific value as low as 2300 kJ / kg into a circulating fluidized bed designed based on multiple regeneration and a combustion chamber without heating surfaces, without adding any high calorific value fuel, to achieve stable pure combustion and low-temperature activation at 850-900℃, generating highly active ash slag with an alumina activity index of not less than 79.6%; subsequently, alumina is extracted by acid extraction, and waste heat is simultaneously recovered for power generation and heating; finally, the white mud produced from alumina extraction is used to prepare silicon fertilizer or building materials, and the process wastewater is converted into chemical products such as dust suppressants and passivating agents. This invention is the first to achieve large-scale pure combustion of extremely low calorific value coal gangue, completely eliminating the dependence on high-quality coal and realizing the high-value utilization of all components, resulting in significant environmental and economic benefits.

The invention provides a solar-driven photo-thermal water-power cogeneration system and a preparation method thereof, according to the system, Fe3O4 and an MAX phase material are firstly combined through a unique material design, and then the combined material is coupled with super-hydrophobic SiO2, so that a super-hydrophobic MAX-Fe3O4 coated SiO2 photo-thermal composite material is prepared. The composite material is sprayed on the hot end of a thermoelectric module to efficiently absorb solar energy. And the cold end of the thermoelectric module is respectively connected with the foamy copper radiator and a water delivery channel made of a melamine sponge material. According to the design, on one hand, waste heat transferred to the cold end can be used for seawater evaporation; on the other hand, the temperature of the cold end can be further reduced through water evaporation, a continuous temperature difference is formed between the cold end and the hot end, and finally efficient solar-driven water and electricity cogeneration is achieved. By means of the design, multiple functions are integrated, the energy utilization efficiency is greatly improved, and a brand new thought is provided for research, development and application of a seawater desalination coupling electric energy production system.

The device comprises a base, a gas internal combustion engine, an air-cooled generator, a heat supply module, a gas inlet module, a water inlet module, a water outlet module, an afterburning furnace and an exhaust module, the gas internal combustion engine is fixedly connected with the base, the air-cooled generator is fixedly connected with the base, and the gas internal combustion engine is fixedly connected with the air-cooled generator. The air inlet module is fixedly connected with the gas internal combustion engine, the air inlet module is fixedly connected with the afterburning furnace, the heat supply module is fixedly connected with the gas internal combustion engine, the water inlet module is fixedly connected with the heat supply module, the water inlet module is fixedly connected with the afterburning furnace, the afterburning furnace is fixedly connected with the water outlet module, and the afterburning furnace is fixedly connected with the exhaust module. The heat supply module is fixedly connected with the water outlet module, and the heat supply module is fixedly connected with the exhaust module; the invention relates to the technical field of cogeneration equipment, and has the advantages of high efficiency, energy conservation, stable water supply, convenience in maintenance and the like.

The application discloses a method for cogeneration load prediction and optimization control and relates to the technical field of cogeneration optimization control. The importance of each variable in the original data set is obtained through different methods, and dimension reduction of the characteristic variables can better select important features to improve the model performance and then improve the universality and reduce the overfitting risk. By comparing the performance of different time series models to select the optimal model, the production load of the thermal power plant can be predicted with high accuracy. Combined with coal quantity change calculation and the time delay of the influence of coal quantity change on steam quantity, the production steam pressure can be effectively stabilized, the production demand can be met, the equipment loss can be reduced, and the main problem long plagued by the thermal power plant can be permanently solved.

This invention belongs to the field of nuclear power unit control technology, and discloses a method and apparatus for peak shaving in a cogeneration nuclear power unit based on secondary loop adjustment. The method includes: collecting the heat balance diagram of the cogeneration nuclear power unit; establishing mass and energy balance equations for each stage of the heaters in the secondary loop of the nuclear power unit, wherein a heat storage tank is installed in the secondary loop; converting the mass and energy balance equations into steam-water distribution equations; obtaining the extraction steam amount for each stage of regeneration in the secondary loop of the nuclear power unit based on the steam-water distribution equations; calculating the minimum and maximum turbine power through the work equations of the secondary loop of the nuclear power unit; defining the electrical load adjustment range of the nuclear power unit as less than or equal to the maximum turbine power and greater than or equal to the minimum turbine power; and performing peak shaving based on the electrical load adjustment range. This invention avoids the safety hazards of traditional nuclear power peak shaving and helps to improve the flexibility and scope of cogeneration nuclear power unit heat and power load adjustment.

The invention discloses an industrial steam extraction combined heat and power generation frequency modulation system and an industrial steam extraction combined heat and power generation frequency modulation method adapting to a variable load condition, and relates to the technical field of combined heat and power generation. The problems that the heat storage capacity is limited and the frequency modulation capacity is low due to the fact that only reheating hot section steam is utilized at the present stage are abandoned, and in the sliding temperature operation mode, due to the fact that the temperature of main steam and the temperature of reheating steam can be changed by unit variable loads, the change trend of the steam extraction amount is completely opposite to the steam extraction temperature in the frequency modulation process, and the heat storage capacity is limited. Therefore, the outlet temperature of the heated molten salt is controlled by changing the sensible heat exchange amount of the main steam superheating heat exchanger and the reheating hot section steam superheating heat exchanger, and through the control strategy that the temperature is dynamically adjusted to be stable through the flow branches and the molten salt flow distribution of the main steam superheating heat exchanger and the reheating hot section steam superheating heat exchanger, the heat exchange efficiency of the molten salt is improved. The stability of the temperature of the heat storage medium in the heat storage process is greatly improved, and finally efficient operation of the system is achieved.

The invention belongs to the technical field of combined heat and power generation units, and particularly relates to a combined heat and power generation unit peak regulation system with an ultrahigh-temperature heat pump coupled with fused salt energy storage. According to the technical scheme, in the heat storage process, a combined heat and power generation unit operates under the lowest load working condition, a boiler is in the lowest stable combustion load, a certain amount of main steam is extracted to heat fused salt, sensible heat of the main steam is stored in the fused salt, and the main steam obtained after heat exchange is decompressed through a pressure reducing valve and then supplied to low-pressure steam; meanwhile, low-temperature steam serves as a low-temperature heat source in the ultra-high-temperature heat pump system with air as a circulating medium, steam flowing out of a boiler low-temperature reheater enters a low-temperature heat exchanger to heat the air, the steam obtained after heat exchange continues to enter a boiler high-temperature reheater to absorb heat to become reheated steam, and then the reheated steam enters a steam turbine intermediate-pressure cylinder to do work; meanwhile, a motor in the ultra-high-temperature heat pump system can consume the cogeneration unit to generate power, and the purpose of zero-load output is achieved. In the heat release process, heat stored by the fused salt is released into feed water to generate high-temperature and high-pressure steam and reheat steam which enter a high-pressure cylinder and an intermediate-pressure cylinder of a steam turbine to do work, and the load rising rate and the peak power generation capacity of the unit are improved; and meanwhile, part of the generated high-pressure steam and low-pressure steam are supplied externally, so that the requirement of industrial steam is met. The problems that in the peak regulation process of the cogeneration unit, the peak regulation capacity is small, and the boiler operation safety and external supply industrial steam parameters under the low load are limited are solved.

The invention provides a thermal power poly-generation system integrating waste heat recovery and pump heat energy storage. The thermal power poly-generation system comprises a combined heat and power generation system, and a flue gas waste heat utilization system exchanges heat with flue gas of the combined heat and power generation system and recovers flue gas waste heat; the pump heat energy storage system comprises a heat pump and a heat storage system, the heat storage system is connected with the combined heat and power generation system and the flue gas waste heat utilization system through pipelines for heat exchange through the heat pump, and the heat storage system is further electrically connected with the combined heat and power generation system for heat storage. The flue gas desulfurization waste heat recovery system is arranged on the tail flue of the boiler, so that the flue gas waste heat can be effectively recovered, and the coal consumption of a unit is reduced; cold energy supply can be achieved through the pump heat energy storage system, meanwhile, surplus electric energy and waste heat are converted into high-temperature heat energy to be stored in a high-temperature storage tank, the high-temperature heat energy is released when needed to generate steam, the steam is reinjected into a steam turbine thermodynamic system, the thermoelectricity operation interval is widened, the unit variable load rate is increased, and the power generation efficiency is improved. The operation regulation capability of the combined heat and power generation system is enhanced, and more flexible regulation and control means are provided.