848results about "Steam superheaters" patented technology

A molten salt heating direct-flow type wet saturated steam generation system, comprising an evaporation device, a molten salt conveying device, a preheating device, a softened water conveying device, and a dryness adjustment device. The evaporation device is provided with a first heat exchange pipeline and a second heat exchange pipeline; the molten salt conveying device comprises a molten salt conveying apparatus and a molten salt recovery apparatus; the preheating device is provided with a first preheating pipeline, and an outlet of the second heat exchange pipeline is connected to a steam output pipeline; and the dryness adjustment device comprises an adjustment member and a dryness measurement apparatus. According to the steam generation system provided by the present invention, the temperature of softened water and the temperature of molten salt can be adjusted to appropriate ranges, avoiding the crystallization of the molten salt; moreover, the dryness of wet saturated steam can be controlled by means of coarse adjustment and fine adjustment, and the direct-flow type evaporation device is suitable for softened water having poor quality so as to meet the steam injection requirements of oil fields.

Disclosed is an energy storage and steam generation system, including an electrode steam boiler. One side of the electrode steam boiler is connected with a boiler deaerator through a pipeline. A pipeline A is arranged at the top of the electrode steam boiler. The pipeline A is connected with a steam superheater, and an outlet of the steam superheater is provided with an external steam supply outlet pipeline. A molten salt steam generation bypass pipeline and a pipeline B are arranged on the steam superheater. One end of the molten salt steam generation bypass pipeline is connected to the steam superheater. A low-temperature molten salt storage tank is connected to the pipeline B, and a high-temperature molten salt storage tank is connected to the low-temperature molten salt storage tank through a pipeline. The other end of the molten salt steam generation bypass pipeline is connected to the high-temperature molten salt storage tank. Meanwhile, a generation method is further disclosed. According to the present disclosure, electric energy is converted into heat energy to be stored in the molten salt, and then energy is released for external steam supply by means of a method for generating steam through heating by coupling the molten salt, thereby realizing large-scale heat storage, prolonging the life of a heating system, and improving the reliability.

Disclosed is a marine fuel cell-based integrated heat, electricity, and cooling supply system comprising a power supply system and a waste heat recovery system; the power supply system comprises wind turbine generator sets, solar generator sets, and a fuel cell power module; the waste heat recovery system encompasses a turbine power generation module and a lithium bromide refrigeration module; the fuel cell power module is connected to both the turbine power generation module and the lithium bromide refrigeration module; the turbine power generation module is used to generate electricity using waste heat. This approach fully exploits the waste heat from the exhaust gas generated by the fuel cell power module, resulting in a high overall energy utilization rate. The self-consumption electricity and pure hydrogen fuel for the integrated energy supply system can be obtained from solar and wind energy, ensuring low carbon emissions for the entire system.

The invention belongs to the technical field of fused salt energy storage, and particularly relates to a start-stop peak regulation coal-fired power generation system and method coupled with fused salt energy storage. According to the system and method for achieving safe and efficient start-stop peak regulation of the unit through coupled fused salt energy storage, when the unit needs to be shut down, a boiler operates at the lowest stable combustion load, a back pressure turbine is arranged to absorb boiler main steam to provide necessary auxiliary power for the unit, and fused salt and a water heat storage system are added to store boiler hot resteam; the original steam turbine of the unit stops, and the unit stops and does not stop the boiler; heat stored by the fused salt and water heat storage system is used for generating steam in unit starting and load increasing stages to increase the load increasing rate of a unit turbine. According to the method, the operation safety problem, the economical problem and the service life loss problem of unit start-stop peak regulation are solved.

Conduction oil is adopted as a heat-carrying medium of a boiler tail flue gas heat recoverer and an external air pre-heater, flue gas low-temperature corrosion is effectively avoided, meanwhile, efficient recycling of waste heat of flue gas of the steam boiler is achieved, and the steam boiler is compact and convenient to install and arrange. The composite heat-carrying type steam boiler is characterized in that the steam boiler adopting water as a heat-carrying medium and the heat-conducting oil boiler adopting heat-conducting oil as a heat-carrying medium are combined, and the composite heat-carrying type steam boiler has a good application prospect.

The invention belongs to the technical field of coal-fired power generation, and particularly relates to a Carnot battery system based on a coal-fired power generation unit and an operation method of the Carnot battery system. The Carnot cell system comprises a heat pump system taking supercritical carbon dioxide as a working medium, a heat storage system and a coal-fired power generation system; the heat pump system comprises a first compressor, a second compressor, a first heat regenerator, a second heat regenerator, a third heat regenerator, a first turbine and a second turbine; the heat storage system comprises a hot tank and a cold tank; the coal-fired power generation system comprises a coal-fired boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a power generator, a condenser, an eighth low-pressure heater, a seventh low-pressure heater, a sixth low-pressure heater, a fifth low-pressure heater, a deaerator, a first high-pressure heater, a second high-pressure heater and a third high-pressure heater. The split-flow compression process and the split-flow expansion process are matched with the multi-stage heat regenerator and the multi-stage fused salt heater, the energy efficiency coefficient of the Carnot battery in the electricity-to-heat conversion process is improved, and therefore the round-trip efficiency of the Carnot battery is improved.

The utility model provides a flexible peak shaving system for a fused salt energy storage coupling thermal power generating unit. The flexible peak shaving system comprises a thermal power generation system, a fused salt heat absorption unit, a fused salt storage unit and a fused salt heat release unit. In the peak regulation stage of the thermal power generating unit, the fused salt heat absorption unit operates, part of main steam is extracted to serve as a heat source and exchanges heat with fused salt to achieve fused salt heat absorption, meanwhile, the fused salt heat release unit operates, a first steam return pipe is opened and used for supplementing boiler reheat steam, the problem of boiler cold overtemperature during fused salt energy storage is solved, and the system can operate smoothly and safely. When the thermal power generating unit operates at the peak, the fused salt heat release unit operates, the fused salt heat absorption unit does not operate, the first steam return pipe is closed, high-temperature fused salt heats supplied water shunted by the water supply unit to generate steam, and the steam converges to a main steam pipeline and / or a reheat steam pipeline through a pipeline and / or exchanges heat with condensate water of the water supply unit through the pipeline. And the molten salt heat release process is realized.

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.

A master-slave type multi-unit cooperative decoupling system comprises a master unit thermodynamic system, a slave unit thermodynamic system and a decoupling steam supply main pipe. Each of the driving unit and the subordinate unit is a thermodynamic system composed of a boiler, a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder. A hot end outlet of the boiler reheater of the active unit is connected with a decoupling steam supply main pipe, and the decoupling steam supply main pipe is connected with a cold end inlet of the reheater of the slave unit; the driving unit assists the subordinate unit in performing machine-boiler decoupling operation by outputting reheated steam; on the basis, if machine-furnace decoupling transformation is carried out on the active unit, whole-plant decoupling can be achieved; the system is simple in configuration, reliable in switching and good in cost performance; and under the decoupling working condition, the decoupling high bypass is opened, the flow is large, the steam turbine flow is small, and when the steam turbine jumps, the original high bypass flow is small, and the impact degree on the boiler is weakened.

Integrated energy systems, such as for use in green industrial processes that produce few or no carbon emissions, and associated devices and methods are described herein. A representative integrated energy system can include a power plant system having multiple modular nuclear reactors. The nuclear reactors can generate steam for direct industrial use or for use in an electrical power conversion system to generate electricity. Individual ones of the nuclear reactors can be configured to flexibly generate differing outputs of steam or electricity based on the vary requirements of the industrial processes of the integrated energy system. The industrial processes can include, for example, the production of hydrogen, oxygen, nitrogen, ammonia, urea, sulfur, sulfuric acid, and / or other useful chemicals.

The invention belongs to the technical field of Carnot battery energy storage, and particularly relates to a low-steam reactive three-cylinder series operation system of a Carnot battery unit and a working method of the low-steam reactive three-cylinder series operation system. Comprising a high-pressure cylinder, an intermediate-pressure cylinder and a low-pressure cylinder which are sequentially connected, in the working state, blades in the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder rotate highly and release a large amount of heat energy, cooling steam is introduced into the high-pressure cylinder at the moment, the cooling steam sequentially flows through the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder, and the cooling steam is cooled. And friction blast heat can be taken away, so that stable temperature distribution of a through-flow part is maintained, meanwhile, flutter and water erosion of the blades are avoided, and the economical efficiency and the safety of operation of the Carnot battery unit are guaranteed.

The invention belongs to the technical field of fused salt energy storage, and particularly relates to a thermal power generating unit deep peak shaving system and method of a fused salt heat storage coupling high-temperature heat pump. In the high-generation time period of renewable energy sources, the load of a thermal power generating unit needs to be reduced, at the moment, a boiler operates at the lowest stable combustion load, a fused salt heat storage system is added, all main steam is extracted to enter the heat storage system to heat fused salt, a high-pressure cylinder of a steam turbine is stopped, and an intermediate-pressure cylinder and a low-pressure cylinder of the steam turbine operate under the low-load working condition; the output load of the unit only meets the plant power, and the load is not output to the power grid; in the load rising time period, heat stored by the fused salt heat storage system is used for generating steam in the unit load rising stage to increase the unit steam turbine load rising rate and peak power generation; the problems of operation safety and low energy grade in the unit peak regulation process are solved. In the peak period of electricity utilization, heat stored in the fused salt heat storage system is released into the unit, and the output load of the unit is rapidly increased. An outlet of the deaerator serves as a water taking point, part of supplied water is extracted to pass through the preheater, the evaporator and the superheater to generate high-temperature and high-pressure steam, the high-temperature and high-pressure steam enters a high-pressure cylinder of the steam turbine to do work, and therefore the output load of the steam turbine is rapidly increased. The invention provides a thermal power generating unit deep peak regulation system and method of a fused salt heat storage coupling high-temperature heat pump, and aims to realize deep peak regulation of a unit and power generation by absorbing renewable energy sources such as wind and light.

The electric steam boiler system is characterized in that a water supplementing pipeline is connected with an electrode boiler through a fourth valve, the output of the electrode boiler is connected with a spherical tank through a pipeline and a first valve, and saturated steam directly discharged from the spherical tank is connected with a user side through a pipeline and a tenth valve; and the output of the spherical tank passes through the solid energy storage superheater before being connected with the user side through a pipeline and a third valve. The system is high in energy storage efficiency, long in service life and high in safety, the solid energy storage superheater directly heats saturated steam stored in the spherical tank, simultaneous charging and discharging can be achieved, the electric steam boiler system can rapidly adapt to changes of different heat using scenes and requirements, and the electric steam boiler system can produce both saturated steam and superheated steam.

The invention provides a method for optimizing an integrated coal gasification combined cycle process by utilizing solar energy. The method comprises the following steps: generating hydrogen and oxygen through photovoltaic electrolysis of water; the dead steam / oxygen mixed gas is heated through fused salt generated through photo-thermal; the coal gasifier is heated through fused salt generated through photo-thermal; carrying out pre-combustion carbon capture on the cooled synthesis gas through an MOF material with a photoinduced structural transformation property; the synthesis gas subjected to carbon capture in the combustion chamber and the other part of oxygen are subjected to pure oxygen combustion; and cooling the flue gas for carbon capture after combustion. According to the method, the operation load fluctuation, the energy consumption and the carbon capture cost of the coal gasification combined cycle process are reduced, and the overall economy is improved.

The utility model relates to the technical field of steam generators, in particular to a steam generator with overheating exhaust, which comprises a steam generator body, a heating cavity is arranged in the steam generator body, and a steam coil is arranged in the heating cavity. Wherein a first connecting air pipe, a second connecting air pipe and an overheating exhaust pipe are arranged at the top of the steam generator body; the overheating exhaust pipe is communicated with the heating cavity; the first connecting gas pipe is connected with the first gas distribution mechanism, and the first gas distribution mechanism is communicated with the heating cavity; the first connecting gas pipe is connected with the first gas distribution mechanism, the second connecting gas pipe is connected with the second gas distribution mechanism, the second gas distribution mechanism is communicated with the heating cavity, and the overheating exhaust pipe is arranged on the steam generator body, so that overheating smoke in the heating cavity can be exhausted from the overheating exhaust pipe instead of being exhausted from the first connecting gas pipe or the second connecting gas pipe; and the whole exhaust period is shortened, so that the problem of overheating can be quickly solved.

According to the gasification fine slag dewatering, drying and recycling method and system provided by the invention, by adopting the scheme, gasification fine slag with high water content can be dewatered and dried and can be used as fuel for resource utilization. The method comprises the following steps: 1) treating coal gasification black water in a black water treatment unit to obtain flash steam and gasification fine slag to be treated; 2) feeding the gasified fine slag to be treated into a fine slag preheater, and preheating by using a heating medium; (3) the preheated gasified fine slag is fed into a drying device to be subjected to heat exchange with superheated steam, and dried gasified fine slag and secondary steam are obtained; (4) the secondary steam is subjected to dust removal treatment, and the obtained secondary steam subjected to dust removal is fed into a fine slag preheater to serve as the heating medium; (5) the secondary steam output by the fine slag preheater is subjected to superheat treatment, and superheated steam is obtained; feeding the superheated steam into a drying device for heat exchange; and 6) feeding the dried gasified fine slag as fuel into a combustion unit for use.

The utility model discloses a multi-group composite winding pipe type heat exchanger which comprises a shell, a medium inlet and a medium outlet, and an inlet end partition plate and an outlet end partition plate are fixedly connected in the shell. An inner split-range cylinder and an outer split-range cylinder are arranged in a shell, the opposite ends of the inner split-range cylinder and the outer split-range cylinder are fixedly connected with an inlet end partition plate and an outlet end partition plate respectively, and a plurality of inlet via holes connected with an inner hole of the inner split-range cylinder are formed in the inlet end partition plate; a plurality of outlet via holes connected with an inner cavity of the shell on the radial outer side of the outer split-range cylinder are formed in the outlet end partition plate; two ends of the preheating winding tube bundle, the hair winding tube bundle and the overheating winding tube bundle in the shell are respectively connected with an inlet and an outlet which are respectively formed in the side wall of the shell; the utility model can realize three functions of preheating, evaporation and overheating, has the advantages of compact structure, large heat exchange area per unit volume, high heat transfer efficiency and capability of realizing multi-stream heat exchange, can improve the steam quality, avoids blockage, and is easy to realize large scale.

The invention relates to the technical field of boilers, in particular to a saturated dual-purpose steam boiler and a flue structure thereof.The saturated dual-purpose steam boiler comprises a first boiler used for combusting fuel to generate smoke and converting liquid water into steam through heat exchange; the second boiler is used for burning fuel to heat the saturated steam into superheated steam; the smoke outlet is used for discharging smoke generated by the boiler; the communicating flue is used for guiding flue gas of the second boiler into the first boiler; the steam-water separator is used for separating water drops in the steam to obtain purer and dry saturated steam; the water draining module is used for draining condensed water separated by the steam-water separator and preventing steam leakage at the same time; the water supply module is used for conveying water to the first boiler and the second boiler; and the overpressure discharge module is used for discharging overheated steam to reduce the pressure in the second boiler. The steam generator has the beneficial effects that saturated steam and superheated steam under different working conditions can be produced, local vortex caused by direct hedging of smoke can be prevented, one smoke outlet is shared, and the applicability is improved.

The present disclosure proposes a thermal power plant peak-shaving system coupled with a heat pump energy storage, comprising: a thermal power system, a heat pump system, an energy storage system and a heating system; wherein, when in the peak-shaving state, the heat absorption channel of the heat pump system is used to absorb heat from the steam circulation path, and the heat release channel of the heat pump system is used to release heat to the energy storage system; when in the peak state, the heat absorption channels of the superheater, the evaporator and the preheater are used to absorb heat from the energy storage system in sequence, and the heat release channels of the preheater, the evaporator and the superheater are used to release heat to the steam circulation path in sequence. In a thermal power plant peak-shaving system coupled with a heat pump energy storage disclosed in the present disclosure, a heat pump cycle is established between the thermal power system and the energy storage system using a heat pump system, and the thermal energy of the peak-shaving steam is "transferred" to the energy storage system to improve the quality and increase the value of the thermal energy. The heat pump cycle can provide the energy storage system with thermal energy that is several times the amount of power consumption, thereby effectively improving the electrical efficiency of the system.

The invention provides a subcritical boiler platen reheater clamping pipe leakage prevention method, device and equipment. The subcritical boiler platen reheater clamping pipe leakage prevention method comprises the steps that dissimilar steel welding connection of a clamping pipe and a pulling plate is relieved; assembling a pipe ring on the outer wall of the clamping pipe to form non-welding type mechanical isolation, and welding and fixing a pulling plate on the outer wall of the pipe ring to complete reconstruction of a stress conduction path; after reconstruction is completed, a two-factor monitoring mechanism for spheroidizing degradation of the clamping pipe and temperature fluctuation of the screen reheater is established; monitoring data are collected based on a two-factor monitoring mechanism, and combustion parameter pre-adjustment and pipeline preventive replacement are dynamically triggered; according to the method, the leakage correlation event is periodically analyzed, the coal blending combustion and maintenance strategy is reversely optimized, the problem that leakage is likely to be caused in a traditional welding mode is solved by removing welding and completing stress conduction path reconstruction, faults can be warned in advance through two-factor monitoring and periodic analysis, and the possibility of leakage is reduced.

The invention discloses an evaporation and overheating integrated heat exchanger and a superheated steam generation method.The heat exchanger comprises a horizontal shell and a partition plate arranged in the shell and provided with evaporation holes, the partition plate divides the shell into an evaporation cavity and an overheating cavity, and a first heating assembly is arranged in the evaporation cavity of the shell; the second heating assembly is arranged in the overheating cavity of the shell, and the liquid inlet and the steam outlet are formed in the upper portion and the lower portion of the same end of the shell. During use, water is guided into the evaporation cavity through the liquid inlet; starting the first heating assembly and the second heating assembly; the first heating assembly is used for heating water in the evaporation cavity to generate steam; steam enters the overheating cavity through the evaporation holes and is output through the steam outlet after being heated into superheated steam by the second heating assembly. The device is small in occupied area, compact in structure and small in pressure loss in the steam evaporation process; the partition plate is creatively used as the gas-liquid separator, and an independent gas-liquid separator is not needed. Therefore, the evaporation efficiency is high, and the quality of the generated steam is good.

The invention relates to a wide-load efficient coal power unit thermodynamic system and a wide-load efficient coal power unit thermodynamic system control method. The wide-load efficient coal power unit thermodynamic system comprises a front high-pressure cylinder and a rear high-pressure cylinder. The front steam admission amount and the front through-flow area of the front high-pressure cylinder are smaller than the rear steam admission amount and the rear through-flow area of the rear high-pressure cylinder, and the steam admission amount sum of the front steam admission amount and the rear steam admission amount meets the rated working condition use requirement of the wide-load efficient coal power unit thermodynamic system. A first valve is arranged on a first main steam transmission branch where the front high-pressure cylinder is connected with the main steam transmission pipeline, a second valve is arranged on a second main steam transmission branch where the rear high-pressure cylinder is connected with the main steam transmission pipeline, and a third valve is arranged on a first steam exhaust pipeline where the front high-pressure cylinder is connected with the rear high-pressure cylinder. The connection state comprises a series connection state and a parallel connection state, and the wide-load operation efficiency of the wide-load efficient coal power unit thermodynamic system can be effectively improved.

Provided is a technology capable of adjusting supply and demand of electric power. A compressed air energy storage device 100 comprises: air compressors 6, 7 that generate compressed air; heat exchangers 24, 25 that exchange heat between the compressed air and a heat storage medium; a pressure accumulation tank 8 that stores the compressed air that has undergone heat exchange in the heat exchangers 24, 25; a heat storage tank 21 that stores the heat storage medium that has undergone heat exchange in the heat exchangers 24, 25; a heat exchanger 32 that generates low-pressure steam by heating water through heat exchange with the heat storage medium; a steam compressor 41 that generates high-temperature steam by compressing the low-pressure steam; generators 12, 13 that generate electric power; and expanders 10, 11 that drive the generators 12, 13 by means of the compressed air or the high-temperature steam. The compressed air energy storage device supplies one or more of the compressed air, the high-temperature steam, and the electric power.

A system for improving a steam oil ratio (SOR) includes a direct steam generator (DSG) boiler fluidly coupled with a downhole portion of a steam system via at least a DSG outlet, wherein the DSG boiler is configured to schedule super-heat delivered to the downhole portion to optimize the SOR associated with the system.

The invention discloses a thermochemical energy storage system and method of an integrated heat pump, an outlet of a water storage tank is communicated with a shell side inlet of a thermochemical reactor through a first water pump and a pipe side of a steam generator, and a shell side outlet of the thermochemical reactor is communicated with an inlet of the water storage tank through a shell side of a preheater and a pipe side of a waste heat recoverer; an outlet of the second water pump is divided into two paths, one path is communicated with the pipe side of the thermochemical reactor, the other path is communicated with the pipe side of the high-temperature heat exchanger through the pipe side of the preheater, and an outlet of the compressor is communicated with an inlet of the expansion machine sequentially through the shell side of the steam generator and the shell side of the high-temperature heat exchanger. And an outlet of the expansion machine communicates with an inlet of the compressor through the shell side of the waste heat recoverer. By means of the system and method, heat can be effectively recovered.

The utility model discloses a sintering system for recycling sintering ring cooling waste gas, which comprises a sintering machine and a ring cooling machine which are sequentially connected in series, a main body fan cover (1) is arranged above the sintering machine in a covering manner, and a cooling fan cover (9) is arranged on the ring cooling machine in a covering manner. And a medium-temperature waste gas outlet of the cooling fan cover (9) is respectively communicated with a front-section air inlet (201), a middle-section air inlet (301) and a rear-section air inlet (401) of the main body fan cover (1) through three independent waste gas recycling pipelines (901). According to the sintering ring cooling waste heat recovery device, waste heat recovery of sintering ring cooling medium-temperature and low-temperature waste gas is achieved at low cost and high efficiency, meanwhile, the discharge amount of the waste gas is remarkably reduced, meanwhile, the sintering working condition is greatly enhanced, and the quality of sintered ore products is remarkably improved.

The invention relates to a waste heat gradient recovery system and a non-ferrous metal smelting system. The waste heat gradient recovery system comprises a heat exchanger, a deaerator, a coal economizer, a fire smelting waste heat boiler, a superheater and a high-pressure pump, and the heat absorption side of the heat exchanger, the deaerator, the coal economizer, a heat absorption side pipeline of the fire smelting waste heat boiler and the superheater are sequentially communicated. The high-pressure pump is arranged between the deaerator and the economizer, so that the demineralized water sequentially exchanges heat and recovers waste heat of the low-temperature area of the sulfuric acid dry absorption section, the low-temperature area of the sulfuric acid conversion section, the pyrometallurgy section and the intermediate-temperature area of the sulfuric acid conversion section. According to the waste heat gradient recovery system, low-grade waste heat in the non-ferrous metal smelting system is recovered, the waste heat recovery efficiency is improved, the steam yield is also improved, superheated steam with high-grade heat energy is finally produced by recovering different grades of waste heat, subsequent steam utilization is facilitated, and the utilization rate of the superheated steam is improved. And the energy consumption in the waste heat gradient recovery system is also reduced.

The invention provides a system and method for increasing the temperature of reheated steam through low-load stable combustion of a boiler, and relates to the technical field of thermal power generation. The system comprises a primary air supply device used for conveying hot primary air to a primary air duct; the secondary air supply device is used for conveying hot secondary air to the secondary air duct; the air extraction pipeline is used for extracting high-temperature flue gas exhausted by the economizer and conveying the high-temperature flue gas to the primary air duct and the secondary air duct; the separating device is used for separating particulate matters in the high-temperature flue gas, and the high-temperature flue gas after particulate matter separation becomes preliminarily purified flue gas; the primary air branch is used for conveying the primarily purified flue gas to a primary air duct so as to increase the air temperature of the hot primary air; and the secondary air branch is used for conveying the primarily purified flue gas to a secondary air duct so as to increase the air temperature of the hot secondary air. According to the system and method for increasing the temperature of the reheated steam through low-load stable combustion of the boiler, the temperature of the reheated steam of the boiler is remarkably increased, the operation economy of the boiler is improved, and the problem that in the prior art, the low-load combustion stability of the boiler is poor is solved.

The invention provides a heat pump coupling fused salt energy storage system and method suitable for peak regulation of a thermal power generating unit, a thermal power generating unit comprises a boiler and a multi-stage steam turbine assembly, the output end of the boiler is communicated with the multi-stage steam turbine assembly, and a heat storage subsystem comprises a high / low-temperature fused salt storage tank and a first / second heat exchanger assembly. The output end of the boiler further communicates with a steam-water channel inlet of the second heat exchanger assembly, an outlet of the multi-stage steam turbine assembly communicates with a water supply pipeline, and the water supply pipeline communicates with the input end of the boiler and a steam-water channel inlet of the first heat exchanger assembly. In the heat storage period, part of high-temperature steam output by the boiler is conveyed to the multi-stage steam turbine assembly, and the remaining high-temperature steam is distributed to the second heat exchanger assembly to be used for heating the low-temperature fused salt. In the heat release period, steam output by the multi-stage steam turbine assembly is condensed to form feed water, the feed water is transmitted to the first heat exchanger assembly, high-temperature steam is formed and flows back to the multi-stage steam turbine assembly, and the multi-stage steam turbine assembly is driven to do work to generate power.

The present invention provides a water-vapor heat exchange system, a movable steam injection boiler and a steam injection method thereof, which include a water heat exchanger located between a water pump and the convection section of the boiler, a flue gas heat exchanger located in the convection section of the boiler, and a radiation section heat exchanger located in the radiation section of the boiler. The water heat exchanger includes an inner heat exchanger tube and an outer heat exchanger tube that exchange heat with each other and are respectively used for the circulation of water medium. The inner heat exchanger tube, the flue gas heat exchanger, the outer heat exchanger tube and the radiation section heat exchanger are sequentially connected along the direction of water medium circulation. After the water medium absorbs heat in the convection section, it enters the water heat exchanger as a heat source to heat the water medium that has not entered the convection section, so that its temperature rises and exceeds the dew point temperature, so as to avoid the low-temperature corrosion of the finned tube by the flue gas. A superheat section is connected at the flue gas outlet of the radiation section, and a superheat section heat exchanger for further heating and evaporating the water medium is arranged in the superheat section. The wet saturated steam coming out of the radiation section is continuously heated and evaporated through the superheat section heat exchanger, ensuring the steam injection effect on the oil well.