985results about "Steam use" patented technology

The invention provides a power plant deep peak regulation and power generation optimization method and system based on steam extraction energy storage, and relates to the technical field of power grids, the method comprises the steps that high-temperature and high-pressure steam is generated through a steam turbine, the steam enters a steam extraction system, and the steam extraction system is used for extracting part of steam exhausted by the steam turbine when the load of the power grid is low; the extracted steam is conveyed into the energy storage device to be stored; based on historical power grid load data and real-time load prediction data, dynamic optimization adjustment of generated power is carried out by combining characteristics of a generator set of a power plant, and deep peak regulation operation of the generator set in a low-load operation state is realized by controlling a power generation dispatching control module of the power plant. The output power of each unit is adjusted through an optimization algorithm; when the load of the power grid is low, part of steam of the steam turbine is stored in the energy storage device through the steam extraction system, and when the load of the power grid is peak, the stored steam flows back to the steam turbine again to be reused.

The present invention provides a coal-fired power generation system coupled with steam energy storage and an operation method, which belong to the technical field of coal-fired power generation. The coal-fired power generation system coupled with steam energy storage comprises: a coal-fired power generation component, wherein the coal-fired power generation component comprises: a coal-fired boiler, a high-pressure steam turbine, a medium-pressure steam turbine, a low-pressure steam turbine, a condenser, a deaerator and a high-pressure heater which are connected and arranged; a steam energy storage component, wherein the steam energy storage component comprises: a gas storage tank; the coal-fired power generation system coupled with steam energy storage of the present invention improves the peak-shaving and frequency-regulating capabilities of the coal-fired unit.

A thermal battery energy storage system coupled with a coal-fired generator set and its operation method, including a coal-fired generator set system and a heat pump energy storage system coupled with molten salt heat storage; the coal-fired generator set system includes a high-pressure cylinder, a medium-pressure cylinder, a low-pressure cylinder, a generator, a condenser, a condensate pump, a low-pressure heater, a deaerator, a feedwater pump, a high-pressure heater, and a boiler; the invention uses the exhaust steam of the low-pressure cylinder as a heat source to preheat the circulating working fluid in the thermal battery heat pump system, so that the total efficiency and COP of the system are increased, and the exhaust steam recovery and utilization capacity is enhanced. At the same time, the output load of the coal-fired unit is reduced, the peak-shaving range of the unit is expanded, and the peak-shaving depth is increased.

Systems and methods for generating electrical power in an organic Rankine cycle (ORC) operation include one or more heat exchangers incorporated into mobile heat generation units, and which will receive a heated fluid flow from one or more heat sources, and transfer heat therefrom to a working fluid that is circulated through an ORC unit for generation of power. In embodiments, the mobile heat generation units comprise pre-packaged modules with one or more heat exchangers connected to a pump of a recirculation system, including an array of piping, such that each mobile heat generation unit can be transported to the site and installed as a substantially stand-alone module or heat generation assembly.

The invention relates to a compressed air energy storage compression waste heat recovery method and system. The system comprises a compressor unit, a compression side heat exchange system, a cooler, an expansion unit, an expansion side heat exchange system, a salt cavern, a low-temperature heat storage device, a high-temperature heat storage device, a motor, a generator and an organic working medium centripetal turbine power generation system. The compressor unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the compression side heat exchange system; the expansion unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the expansion side heat exchange system; and the organic working medium centripetal turbine power generation system is connected to the compressor unit through the cooler. Therefore, heat which is not utilized in the original compressed air energy storage compression process is completely used for heating the organic working medium R123 in the organic working medium centripetal turbine power generation system, efficient utilization of energy is achieved, and the overall efficiency of the compressed air energy storage system is improved.

The invention provides a power plant steam extraction energy storage peak shaving decoupling method and system based on a fused salt heat storage technology, and relates to the technical field of energy, and the system comprises a fused salt heat storage device, a steam extraction energy storage system, a peak shaving decoupling control device and a waste heat utilization device; the fused salt heat storage device comprises a high-temperature fused salt storage tank and a low-temperature fused salt storage tank which are longitudinally arranged in a layered mode. The steam extraction energy storage system comprises a steam turbine steam extraction opening, a steam extraction main pipeline, a plurality of branch pipelines and steam extraction adjusting valves arranged correspondingly. The peak shaving decoupling control device adopts a control algorithm based on fuzzy PID, and meanwhile coordinates the electric heating power in the high-temperature fused salt storage tank to realize the optimal matching of the steam extraction heat storage process and the fused salt heat release process; the waste heat utilization device is connected to the bottom of the low-temperature fused salt storage tank and provides cooling capacity for the working environment of the power plant.

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 invention relates to the technical field of compressed carbon dioxide energy storage, and provides a double-liquid-state storage compressed carbon dioxide energy storage system, which comprises a heat pump loop, a first multi-stream heat regenerator, a compressor, a cooler and a first turbine, a second multi-stream heat regenerator, a second multi-stream heat regenerator, a second multi-stream heat regenerator, a second multi-stream heat regenerator, a second multi-stream heat regenerator, a second multi-stream heat regenerator and a second turbine, and the power generation loop comprises a high-pressure CO2 liquid storage tank, a high-pressure working medium pump, a second multi-stream heat regenerator, a heater, a second turbine, a precooler and a condenser. CO2 flows in the heat pump loop and the power generation loop to serve as a working medium, and low-pressure CO2 liquid and high-pressure CO2 liquid are stored in the low-pressure CO2 liquid storage tank and the high-pressure CO2 liquid storage tank and used for the heat pump loop and the power generation loop respectively. By using the CO2 liquid, the pressure in the tank can be maintained during release, the output flow is ensured, and the output of the system is stable. And meanwhile, CO2 liquid can be output through the high-pressure working medium pump, pressure loss caused by throttling is avoided, and the energy storage efficiency is improved. And through liquid storage tank storage, the storage tank volume can be reduced, and the energy storage cost is reduced.

The invention relates to the technical field of coalification black water treatment, and particularly discloses a coal gasification black water flash steam waste heat steam turbine gradient utilization system which comprises a black water flash steam turbine module and a steam exhaust condensation module. The black water flash steam turbine module comprises a high-pressure flash evaporator, a low-pressure flash evaporator, a vacuum flash evaporator, a supplementary condensing steam turbine, a generator and a settling tank, and a water outlet of the vacuum flash evaporator is connected with the settling tank; the steam exhaust condensation module comprises an evaporative condenser and a condensate pump. Through the design of the scale scraping and water uniformizing piece, part of cooling water falling around the heat exchange coil from top to bottom falls on the water uniformizing plate to drive the water uniformizing plate to rotate, when the water uniformizing plate rotates, water on the water uniformizing plate is thrown out under the action of centrifugal force, cooling water without heat exchange can be uniformized to other heat exchange pipes for heat exchange, and the heat exchange efficiency is improved. Therefore, the cooling water flows more uniformly among the heat exchange coils, the utilization rate of the cooling water is improved, and the heat exchange efficiency is improved.

The invention relates to the technical field of nuclear energy comprehensive utilization, and discloses an energy system with nuclear energy as base load and a control method.The system comprises a nuclear power secondary loop system, a renewable energy system, an energy storage system, a steam supply system, a seawater desalination system, a hydrogen production system, a heating system and a refrigeration system; the heat of the reactor core enters the steam generator to generate main steam; the photovoltaic module and the wind turbine generator set carry out renewable energy power generation; a storage battery is used for storing renewable energy electric power, and a molten salt heat storage system is used for storing heat energy; the steam supply heat exchanger is used for heating fresh water produced by the seawater desalination system to obtain superheated steam; the low-temperature multi-effect evaporation system and the reverse osmosis membrane method seawater desalination system generate fresh water; the electrolytic bath generates hydrogen and oxygen; the heating system and the refrigerating system are used for refrigerating in summer and heating in winter, and nuclear energy, wind energy, solar energy and the like are coupled and utilized in a stepped mode.

The invention belongs to the technical field of carbon dioxide energy storage, and particularly relates to a supercritical carbon dioxide energy storage system with combined cooling, heating and power, which realizes combined cooling, heating and power by recycling waste heat of a combined cooling, heating and power system and improves the energy utilization rate of the system. Carbon dioxide generated by the combined cooling heating and power system is captured and stored in the exhausted oil and gas reservoir high-pressure gas chamber and the exhausted oil and gas reservoir low-pressure gas chamber through the carbon dioxide capturing system, energy is stored through the stored carbon dioxide gas, and the stability maintaining effect on electric energy is achieved while carbon emission is reduced. The energy release unit is in heat exchange connection with the carbon dioxide capture system, the temperature of high-pressure carbon dioxide in the energy release stage is increased, and the comprehensive energy utilization rate and efficiency of the system are further improved.

An energy storage system converts variable renewable electricity (VRE) to continuous heat. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. An array of bricks incorporating internal radiation cavities is directly heated by thermal radiation. The cavities facilitate rapid, uniform heating via reradiation. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. Gas flows through structured pathways within the array, delivering heat which may be used for processes including calcination, hydrogen electrolysis, steam generation, and thermal power generation and cogeneration. Low temperature waste heat from energy production can be recovered and used to improve overall system efficiency.

The embodiment of the invention provides a thermal power plant waste heat gradient utilization management method and system, belongs to the field of energy and power engineering, and aims at solving the problems that in the prior art, waste heat gradient matching is unreasonable, the low-temperature waste heat recovery efficiency is low, and the system integration degree is insufficient. The method comprises the following steps: constructing a multi-physics field coupling digital twinborn model and performing real-time correction; establishing a dynamic matching matrix of the residual heat source and the heat consumption load based on balance analysis; solving a Pareto optimal operation scheme through a multi-objective optimization model; and generating and issuing a cooperative control instruction. The system comprises a panoramic data sensing module, a digital twin modeling module, a balance and optimization decision module and a cooperative control instruction generation module. Through global optimization and dynamic regulation and control, the waste heat utilization efficiency, the economical efficiency and the equipment reliability are remarkably improved.

The invention discloses a low-pressure cylinder zero-output coupling steam heat accumulator which comprises an intermediate-pressure cylinder connected with a reheating hot section of a steam turbine; the low-pressure cylinder is connected with the output end of the medium-pressure cylinder; a cooling steam source is also connected; the generator is connected with the output end of the medium-pressure cylinder and / or the low-pressure cylinder to generate electric energy; the condenser is connected with the output end of the low-pressure cylinder; the condensate pump is connected with the output end of the condenser and further connected with the output end of the intermediate-pressure cylinder. The steam heat accumulator is connected with the output end of the medium-pressure cylinder; and the regenerative heating mechanism is respectively connected with the output ends of the steam heat accumulator and the intermediate pressure cylinder and is also connected with the input end of the condensate pump. In the deep peak regulation period of the unit, cooling steam enters the low-pressure cylinder, output of the unit can be reduced, part of heat is released through the steam heat accumulator, return water is heated and output through the regenerative heating mechanism, and deep peak regulation and thermoelectric decoupling of the unit are achieved.

The invention discloses a Carnot battery system for cascade heating of heat supply network water and an operation method of the Carnot battery system, and belongs to the technical field of Carnot battery systems, the system comprises a steam turbine power generation system, a heat supply network water heating system, an electricity-to-heat system and a storage tank heat storage and release system. Based on a traditional Carnot battery system, the heat supply network heat exchanger is additionally arranged on the heat storage part of the storage tank system, so that the thermoelectric load characteristic interval of the system is expanded, and the operation flexibility of the system is improved. And meanwhile, abandoned electricity of a new energy station can be reduced, and the network access rate of new energy is increased. In addition, the temperature of the heat storage medium entering the heat source heat exchanger is reduced by heating heat supply network water, so that the COP and the round-trip efficiency of the system are improved; the heat exchange loss of heat supply network water is reduced due to the cascade heating system, and the energy utilization rate is increased. Compared with a traditional Carnot cell system, the system has higher efficiency and lower coal consumption, and theoretical reference and technical transformation can be provided for coal-electricity low-carbon flexible transformation.

The invention discloses an LNG (Liquefied Natural Gas) cold energy utilization system and method, and the system comprises an organic Rankine cycle power generation unit which is used for heating LNG to-70 DEG C to-40 DEG C and conveying the heated LNG to an intermediate medium cold storage unit; the intermediate medium cold storage unit is used for transferring the cold energy of the LNG to an intermediate medium and heating the LNG into gaseous NG at the same time; and the gas-liquid carbon dioxide energy storage unit is used for transferring the cold energy of the intermediate medium to carbon dioxide. The ultralow-temperature LNG cold energy at the front end is recycled through the organic Rankine cycle power generation unit, direct contact between carbon dioxide and LNG is avoided through the intermediate medium cold storage unit, the LNG tail end cold energy is effectively recycled and effectively transmitted to all links of the gas-liquid carbon dioxide energy storage unit, efficient recycling of the LNG cold energy is achieved, and the energy storage peak shaving capacity is achieved.

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.

A system includes an exhaust diffuser system for a heat recovery steam generator (HRSG). The system includes an inlet portion, a diffuser portion axially extending from the inlet portion, and an outlet portion fluidly coupled to an axial distal end of the diffuser portion, wherein an outlet extent of the outlet portion is greater than an inlet extent of the inlet portion. The diffuser portion includes a plurality of wall portions, and the plurality of wall portions is incrementally angled relative to an axial extent extending from the inlet portion to the outlet portion. The system may further include a gas turbine engine coupled to the inlet portion and the HRSG.

According to the peak and frequency modulation thermal power generating unit system integrating heat pump energy storage, by coupling the heat pump energy storage device driven by the small steam turbine, when the load of the unit is reduced, the steam extraction amount of the small steam turbine is increased, the flow of the large steam turbine is reduced, and the output of the unit is reduced; surplus output of the small steam turbine drives the heat pump to operate, and mechanical energy is converted into cold energy and heat energy to be stored; when the load of the unit is increased, the stored high-temperature heat is used for heating the high-pressure heater feed water and squeezing the high-pressure extracted steam, and meanwhile, the stored low-temperature heat is used for cooling the low-pressure cylinder exhaust steam and reducing the back pressure of the unit, so that the output of the unit is increased. Mutual conversion between mechanical energy and heat energy is achieved through the coupling heat pump energy storage device, and therefore the effects of deep peak regulation, rapid peak jacking, frequency modulation and the like of the unit are achieved; energy at the hot end and the cold end of the heat pump energy storage device is fully stored and utilized, energy loss is small, and the energy utilization efficiency is high; the coupling degree of the heat pump energy storage device and the main machine is weak, the system is simple, operation is flexible, and good safety and economical efficiency are achieved.

Systems and methods for generating and a controller for controlling generation of geothermal power in an organic Rankine cycle (ORC) operation in the vicinity of a wellhead during hydrocarbon production to thereby supply electrical power to one or more of in-field operational equipment, a grid power structure, and an energy storage device. In an embodiment, during hydrocarbon production, a temperature of a flow of wellhead fluid from the wellhead or working fluid may be determined. If the temperature is above a vaporous phase change threshold of the working fluid, heat exchanger valves may be opened to divert flow of wellhead fluid to heat exchangers to facilitate heat transfer from the flow of wellhead fluid to working fluid through the heat exchangers, thereby to cause the working fluid to change from a liquid to vapor, the vapor to cause a generator to generate electrical power via rotation of an expander.

The embodiment of the invention discloses a peak regulation method, device and equipment for a cogeneration unit and a storage medium, and relates to the technical field of electric power, and the method comprises the steps: determining the heat user demand heat of a preset region in a current unit time length based on the heat supply scene information of heat users in the preset region and a predicted outdoor temperature sequence of the preset region in the current unit time length, based on heat supply network heat supply steam information extracted from the combined heat and power generation unit by a heat supply network heat supply system in the preset area in the current unit time, heat source heat supply heat of the preset area in the current unit time is determined; the supply and demand deviation is determined according to the heat user demand heat and the heat source heat supply heat, and when the supply and demand deviation is larger than a set deviation threshold value, a heat storage adjusting valve is opened to start a heat storage mode of the heat supply network heat supply system, and when the heat user demand heat is larger than the heat source heat supply heat, heat stored by the heat supply network heat supply system in the heat storage mode is used for heat supply. And the peak regulation flexibility of the cogeneration unit is improved in a peak load shifting manner.

The invention relates to a system and a method for rapidly switching energy storage and release modes of a large compressed air energy storage power station. The system comprises a compressor unit, a compression side heat exchange system, a cooler, an expansion unit, an expansion side heat exchange system, a salt cavern, a low-temperature heat storage device, a high-temperature heat storage device, a switching valve, a high-temperature heat storage circulating pump, a low-temperature heat storage circulating pump, a stop valve, a motor and a generator. The compressor unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the compression side heat exchange system and the cooler; the expansion unit is connected to the salt cavern, the low-temperature heat storage device and the high-temperature heat storage device through the expansion side heat exchange system; a switching valve is arranged between the compressor unit and the expansion unit. According to the invention, rapid switching between the energy storage mode and the energy release mode of the compressed air energy storage power station is realized, so that the increasingly frequent peak regulation requirement of a power grid is met.

According to the power plant waste heat recovery system and method, the types of recovered power plant waste heat are very comprehensive, and the power plant waste heat is recycled in a stepped mode. All waste heat, including flue gas waste heat, circulating water waste heat, furnace wall waste heat and slag waste heat, of the thermal power plant is recovered at the same time. In addition, different heat pumps and different heat exchangers are selected according to different waste heat characteristics, all recoverable waste heat is efficiently recovered, and the energy conversion efficiency of a power plant is improved. The cascade recycling of the waste heat of the power plant comprises three recycling modes of a low-pressure steam turbine generator set, a low-boiling-point working medium generator set and a heat supply pipeline. According to the method, on one hand, the applicability of the waste heat recovery system of the power plant is improved, the method is suitable for different types of thermal power plants, and is also suitable for the influence of different seasons and environment temperature factors on waste heat, and on the other hand, the waste heat is recycled to the maximum extent according to comparison and matching of the temperature and pressure set value and the measured value of the recycling equipment, and waste of the waste heat is avoided.

The invention relates to the technical field of new energy power generation and energy storage, in particular to a combined heat and power generation system and method for achieving flexible peak regulation of a nuclear power unit. Thermoelectric decoupling is achieved through heat storage, meanwhile, waste heat of a power plant is comprehensively recycled, electric-heat conversion is achieved through heat pump temperature rising, and an ORC generator set is coupled to assist power peak regulation. In the peak period of power utilization, the nuclear power unit generates power in a full-power mode, the high-temperature heat storage tank serves as a high-temperature heat source to drive the ORC unit to generate power or supply heat to the outside, hot water returns to the medium-temperature heat storage tank to be stored after heat is released, and in addition, dead steam waste heat generated during power generation is stored through the low-temperature heat storage tank. In the electricity consumption trough period, steam extraction and heat storage are achieved as much as possible, the heat pump is driven by means of multiple electricity, waste heat of dead steam and waste heat stored in the peak period are heated by means of the heat pump, then heat is supplied, and redundant high-temperature heat is stored. In this way, the heat supply capacity is improved, deep peak regulation of electric power is achieved, and the whole combined heat and power generation system can be flexibly adjusted to operate according to changes of heat loads and electric loads.

The utility model relates to the technical field of solar photo-thermal power generation, in particular to a compressed carbon dioxide heat pump and heat conduction oil groove type photo-thermal coupled power generation system. The compressed carbon dioxide heat pump and heat conduction oil groove type photo-thermal coupled power generation system comprises a solar groove type heat collection module, a carbon dioxide heat conduction oil heat exchanger, a compressed carbon dioxide heat pump module, a fused salt heat storage module, a power generation module and a low-temperature heat storage module. The solar trough type heat collection module exchanges heat with the compressor compressed carbon dioxide heat pump module through the carbon dioxide heat conduction oil heat exchanger. The compressed carbon dioxide heat pump module exchanges heat with the low-temperature heat storage module through the fused salt heat storage module and the power generation module. The temperature of the fused salt in the trough type solar photo-thermal power station can be increased to 560 DEG C or above, the use amount of the fused salt is greatly reduced, the investment cost is reduced, and meanwhile steam parameters are improved, so that the power generation efficiency is improved.

The invention discloses a source and storage integrated low-carbon power generation system and an operation method. The system comprises a coal-fired power generation subsystem, a decarburization subsystem and a pump heat energy storage subsystem. In order to improve the operation flexibility and the energy efficiency level of the system, the system is optimized as follows: (1) in a low ebb of electricity consumption, electric energy is output to drive a compressor to pressurize and heat steam extracted by an intermediate-pressure cylinder, then molten salt is heated, and then the steam enters a reboiler after acting through an expansion machine; and finally, redundant electric energy is converted into heat energy of the fused salt to be stored. And (2) in the peak period of power utilization, the feed water from the deaerator is heated by the high-temperature fused salt stored in the fused salt storage tank and then enters the expansion machine to do work, so that the output of the decarburization coal-fired power generation unit is improved. And the extracted steam of the intermediate-pressure cylinder acts through the expansion machine and then enters the reboiler. And (3) normal-temperature water serves as a heat absorption working medium, waste heat in the decarburization process is sequentially absorbed according to the heat grade, and part of medium-pressure cylinder extraction steam is replaced under the action of the ejector to provide heat for the reboiler. According to the system, the carbon capture energy efficiency punishment is effectively reduced, and the operation flexibility is improved.

The embodiment of the invention provides a multi-steam-source cooperative frequency modulation combined heat and power generation system and a control method. The system comprises a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a power generator, a multi-stage regenerative heater, a heating system and a heating steam supply pipeline. A main steam outlet of the boiler is connected to the high-pressure cylinder through a main steam pipeline, a steam exhaust port of the high-pressure cylinder is connected to the intermediate-pressure cylinder through a pipeline, a steam exhaust port of the intermediate-pressure cylinder is connected to the low-pressure cylinder through a pipeline, and a steam exhaust port of the low-pressure cylinder is connected to the generator through a pipeline. A condensate water outlet of the medium-pressure cylinder is communicated to a condensate water inlet of the boiler through a first condensate water pipeline; the heating system is communicated with a steam exhaust port of the medium-pressure cylinder through a heating steam supply pipeline; the multi-stage regenerative heater is arranged on the first condensate water pipeline and connected with the high-pressure cylinder and / or the intermediate-pressure cylinder through steam extraction pipelines, and steam extraction adjusting valves are correspondingly arranged on the steam extraction pipeline between the high-pressure cylinder and the multi-stage regenerative heater and / or the steam extraction pipeline between the intermediate-pressure cylinder and the multi-stage regenerative heater.

The invention discloses a deep peak regulation and frequency modulation heat energy storage system and method coupled with a coal-fired unit, and belongs to the technical field of coal-fired unit flexible transformation and power grid regulation. Aiming at the problems that a single fused salt / solid heat storage occupies a large area, the initial investment is high, a steam generation system is complicated, and a conventional coal-fired unit is difficult to meet the requirements that the minimum power generation output of a new generation coal-electricity pilot demonstration unit is less than or equal to 20% Pe, and deep peak regulation is realized to give consideration to primary frequency modulation performance through self or auxiliary regulation as much as possible in the specification of power generation and transformation energy (2025) 363. The system comprises a heat energy storage unit and a coal-fired unit, the heat energy storage unit comprises a demineralized water supply water tank, an electrode steam boiler, a spherical tank and a heat storage type steam temperature increasing device, and the structure of spherical tank flash evaporation steam supply and heat storage temperature increasing sensible heat supplementing is adopted to be matched with steam supplementing of a steam turbine. The combined minimum power generation output of the two can be reduced to 10% Pe, the peak increase output is at least 5.6% Pe, primary frequency modulation is assisted by increasing and decreasing the power consumption of the electrode steam boiler, and new energy consumption is assisted.

The invention relates to the technical field of heating and heat supply, and discloses a method and system for improving the heating and heat supply capacity through soil heat storage, and the method comprises the steps that thermal power generating unit data are collected, and whether the heating steam extraction capacity meets the load requirement or not is judged; when the heating steam extraction capacity meets the load requirement, heat is stored through the soil heat accumulator; when the heating steam extraction capacity is insufficient, heat is released through the soil heat accumulator; heat storage and release parameters are calculated according to thermal power generating unit data, the heat release rate is dynamically adjusted, and heating load fluctuation is stabilized. According to the method, thermal power generating unit data are collected, the heating steam extraction capacity is judged, and the heat storage and release process is dynamically adjusted; through the sleeve structure and the fin design of the soil heat accumulator, the heat accumulation and heat release efficiency is improved; and in combination with calculation of heat storage and release parameters and soil heat storage amount, accurate monitoring and optimization of heat utilization are achieved, energy loss is reduced, the reliability and economical efficiency of the system are improved, and therefore efficient and stable operation of the heating system is achieved, and the requirements of deep peak regulation and extremely cold periods are met.

The invention belongs to the technical field of gas turbines, and relates to an indirect heating biomass gas turbine system and a method thereof, the indirect heating biomass gas turbine system comprises an air compressor, an air turbine, a generator, a combustion chamber, a first waste heat recovery module, an indirect heating module, a second waste heat recovery module and a third waste heat recovery module. The compressed air is heated in a mode of indirect heat exchange between the compressed air and the flue gas, direct contact between fuel combustion products and turbine blades is avoided, the problems of corrosion, dust deposition, abrasion, scaling and the like of the turbine blades are effectively prevented, the service life of core components such as the turbine blades is prolonged, and meanwhile the service life of the turbine blades is prolonged. The tail gas waste heat of the air turbine is used for heating compressed air, the average heat absorption temperature of air is increased, and therefore the fuel combustion thermoelectric conversion efficiency is improved, in addition, heat supply and cold supply are conducted on users through the tail gas waste heat of the air turbine, the energy utilization efficiency of the system is improved, and the energy consumption is reduced. And combined heat and power generation can be realized in winter, and combined cooling and power generation can be realized in summer.