91results about "Steam regeneration" patented technology

A system for generating steam for industrial heat. The system may include a plurality of heat pump cycles in thermal communication with each other and in thermal communication with a steam generation cycle. The plurality of heat pump cycles may include first and second heat pump cycles. The first heat pump circulates a first a working fluid and includes a first heat exchanger. The second heat pump cycle circulates a second working fluid and includes a second heat exchanger. The first heat exchanger transfers heat from the first to the second working fluid. The second heat exchanger transfers heat to a third working fluid in the steam generation cycle.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the energy storage system provides higher-temperature heat to a conventional lower-temperature heat source to boost the temperature of a thermal power cycle working fluid to a turbine, thereby increasing efficiency of the power cycle.

Waste heat cascade utilization system for the synergistic recovery of heat energy from heat exchange and milling heat, characterized in that it includes a mechanical heat recovery device, a primary preheating device, a secondary steam generation device and a tertiary low-temperature utilization device; wherein the mechanical heat recovery device connects the heat-generating components of the blower mill to the dry pipe inlet air duct in order to absorb the heat generated by the heat-generating components of the blower mill and transfer it to the dry pipe inlet air duct; wherein the primary preheating device, the secondary steam generating device and the tertiary low-temperature utilization device are arranged sequentially in the flue gas duct at the dry pipe flue gas outlet; wherein the heat outlet of the primary preheating device is connected to the combustion air duct of the boiler in order to preheat the combustion air of the boiler; wherein the steam outlet of the secondary steam generating device is connected to the steam inlet of a steam turbine to assist the turbine in driving a generator for electricity generation; and wherein the tertiary low-temperature utilization device is connected to the process water line to regulate the process water temperature and to assist the plant heating.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the energy storage system provides higher-temperature heat to a conventional lower-temperature heat source to boost the temperature of a thermal power cycle working fluid to a turbine, thereby increasing efficiency of the power cycle.

The utility model discloses a positive pressure shaft seal system for a steam turbine, which comprises the steam turbine, a heat exchanger, a low pressure section seal and a high pressure section seal, the steam turbine is a back pressure type steam turbine, the steam turbine comprises a cylinder and a rotor, the cylinder is connected with a steam inlet pipe and a steam exhaust pipe, the rotor is arranged in the cylinder, and two ends of the rotor are connected with a main shaft. Low-pressure section seals and high-pressure section seals are installed on the main shaft, the low-pressure section seals on the two sides are both connected with steam leakage connecting pipes, the steam leakage connecting pipes on the two sides are both connected with a heat exchanger, and a circulating water pipeline, a condensate water pipeline and an atmosphere exhaust pipe are further installed on the heat exchanger. The shaft end steam leakage amount of the steam turbine is effectively reduced, the working steam amount consumed by the shaft seal steam extractor for establishing negative pressure is reduced, the internal pressure of the heat exchanger is positive, a water seal does not need to be arranged, and the civil engineering cost is effectively reduced.

The invention provides a thermodynamic cycle system applied to a steam turbine. The thermodynamic cycle system comprises a boiler, the steam turbine and a vortex tube. The boiler generates steam with first temperature; the steam turbine discharges a first path of steam with second temperature to the vortex tube, a second path of steam with second temperature is discharged to the liquid inlet of the boiler, the vortex tube separates the first path of steam into hot steam with third temperature and cold steam with fourth temperature, and the hot steam with third temperature is recycled to the steam turbine; the steam turbine drives mechanical equipment through hot steam with the third temperature, cold steam with the fourth temperature is discharged to the liquid inlet of the boiler, the third temperature is higher than the second temperature, and the fourth temperature is lower than the second temperature; wherein the cold steam with the fourth temperature cools the second path of steam to generate cooling liquid, the cooling liquid enters the boiler from a liquid inlet of the boiler, the steam with the first temperature is generated after heating, a vacuum water ring pump and a condenser are omitted, and energy is saved.

The invention provides an electrolyser system (10) comprising a heat storage unit (14) and an electrolyser (16). The heat storage unit (14) comprises at least one heat source infeed. The electrolyser (16) comprises at least one electrolyser cell (20), a steam inlet and at least one off-gas outlet. The off-gas outlet is connected to the heat source infeed to heat the heat storage unit (14). The heat storage unit (14) is configured to use its stored heat to produce steam for feeding into the steam inlet and for generating electrical power, either one at a time or both at the same time. The invention also provides a system comprising an intermittent or variable electricity source (12) and an electrolyser system (10) as defined above. The intermittent or variable electricity source (12) can be configured to power the electrolyser (16) and to heat the heat storage unit (14) via a heating element, either both at the same time or individually.

Systems, methods, and apparatuses for utilizing heat are provided. A flash vessel structure includes a first flash chamber and a second flash chamber opposite the first flash chamber. The flash vessel structure is configured to receive a liquid media flow via the first flash chamber, flash evaporate a portion of the liquid media flow to generate a vapor, and drain the liquid media flow via a liquid outlet on the second flash chamber. Adjacent flash chambers are separated by a separator structure including a liquid opening submerged within the liquid media flow. Each flash chamber includes a vapor orifice configured to stay above the liquid media flow. The flash chambers are arranged along a horizontal direction that is substantially perpendicular to gravity. Compressors are coupled via a vapor channel to the flash structure to compress the vapor received from the respective flash chamber.

The present application discloses a cogeneration system based on a liquid-vapor ejector and a water turbine power generation device, which includes a boiler, an intermediate pressure cylinder of a steam turbine, a low-pressure cylinder of the steam turbine, a condenser and a feed water pump connected in sequence through pipelines, and a liquid-vapor ejector, a water turbine power generation device and a heat network heater connected in sequence through pipelines. The steam outlet of the intermediate pressure cylinder of the steam turbine or the extraction port of the low-pressure cylinder of the steam turbine is connected to the liquid-vapor ejector through a pipeline; the intermediate tap of the feed water pump is connected to the liquid-vapor ejector through a pipeline, the liquid-vapor ejector is connected to the fluid inlet of the water turbine power generation device through a pipeline, and the water turbine power generation device is connected to the water inlet of the heat network heater through a pipeline. The high-pressure water coming out of the intermediate tap of the feed water pump entrains the steam outlet of the intermediate pressure cylinder of the steam turbine or the pressurized high-temperature steam coming out of the extraction port of the low-pressure cylinder of the steam turbine to form high-temperature and high-pressure water to drive the water turbine power generation device to generate electricity, and then the high-temperature and high-pressure water becomes high-temperature and low-pressure water for heating, reducing the steam heat exchange loss.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the TES provides higher-temperature heat through non-combustible fluid to an alumina calcination system used to remove impurities or volatile substances and / or to incur thermal decomposition to a desired product.

A thermal energy storage system with fluid flow insulation, the system including heated thermal storage blocks positioned within a housing, and a method for operating the thermal energy storage system, including providing a flow of fluid into the housing, the fluid convectively extracting heat from a top region, a side region and a bottom region of the thermal energy storage system, to generate heated fluid that insulates the thermal storage blocks from the housing and a foundation of the thermal energy storage system.

The present invention relates to a method for recovering energy comprising the steps of: a) Providing a hot fluid stream; b) Thermally contacting the hot fluid stream with an aqueous condensate in a heat exchanger, thereby transferring heat from the hot fluid stream to the aqueous condensate and vaporizing at least part of the aqueous condensate to obtain a steam stream having a temperature T1 and a pressure p1; c) Subjecting the steam stream to at least one compressing step(s) to obtain a compressed steam stream having a pressure p2; and d) Using the compressed steam stream for energy recovery thereby obtaining a stream comprising an aqueous condensate, wherein—the ratio of pressure p2 to pressure p1, p2 / p1, is 5 to 50; a facility for recovering energy comprising one or more means for compressing the steam stream having a temperature T1 and a pressure p1 to obtain a compressed steam stream having a pressure p2, and the use of one or more means for compressing a steam stream connected in series in said method or facility for compressing a steam stream having a temperature T1 and a pressure p1 to obtain a compressed steam stream having a pressure p2 for direct energy recovery.

A reaction turbine operates on the heat released from the condensation of steam, combined with inherent steam pressure and temperature heads. A series of rotors, each containing multiple curved internal channels, provide compressive boosts between successive stages, while avoiding excessive self-compression. Compressive effects and shock waves generated within these channels provide high levels of condensation, thereby releasing immense amounts of heat. The resulting hot vapor and condensate droplets are then ejected tangentially at the periphery of the rotors to generate thrust. The exhaust steam from the last stage is then compressed and returned to the engine inlet to be mixed with the incoming fresh steam, thereby efficiently completing the system cycle without the need of large cooling towers for condensation.

To provide a steam generating device and a steam generating method that can generate high-pressure steam from exhaust heat of low-pressure fluid with high efficiency.SOLUTION: A steam generating device comprises: a compressor for sucking and compressing steam; a condensate pipe for merging water separated from steam discharged from the compressor, with steam to be sucked by the compressor; and a pressure reducer provided in the condensate pipe, and for reducing the pressure of water flowing through the condensate pipe. Preferably, the steam generating device comprises an upstream compressor for compressing steam to be sucked by the compressor, and has a structure in which low-pressure steam is compressed by the two compressors.SELECTED DRAWING: Figure 1

A method includes using an isochoric displacement through a valved or ducted thermal regenerator to raise the pressure of a vaporized reactant or vaporized reactant constituent as a means to regeneratively capture waste exhaust heat from the product or product constituents of a previous endothermic dissociation of a previous charge of said reactant.

The invention provides a nuclear energy heat supply system which can be used in the technical field of energy. The system comprises a nuclear power generation system, a steam ejector, an absorption heat pump and a heat supply network pipeline, the nuclear power generation system comprises a steam turbine which comprises a high-pressure cylinder and a low-pressure cylinder. The steam ejector is connected with the high-pressure cylinder and the low-pressure cylinder and used for introducing high-grade steam of the high-pressure cylinder and low-grade steam of the low-pressure cylinder, and medium-grade steam is obtained after the high-grade steam and the low-grade steam are mixed. The absorption heat pump is connected with the steam ejector so as to take the medium-grade steam as a driving heat source; the absorption heat pump is connected with a closed circulating cooling pipeline of the nuclear energy power generation system so that closed circulating cooling water of the closed circulating cooling pipeline can serve as a low-temperature heat source. The heat supply network pipeline is connected with the absorption heat pump so that heat supply network return water in the heat supply network pipeline can be heated through the absorption heat pump. By recycling the exhaust steam of the low-pressure cylinder, the nuclear power heat supply efficiency and the energy utilization rate are greatly improved.

The invention relates to the technical field of thermal power plant steam turbines, in particular to a method and device for improving the economical efficiency of a low-load steam turbine, electronic equipment and a storage medium. And solar fluctuation is dynamically adjusted based on a heat storage system in the solar steam generation system, the wet steam running time of the low-pressure cylinder is shortened, meanwhile, the heat storage system is dynamically controlled, and the opening degree of a water supply valve and the flow of heat conduction oil are adjusted to adapt to load changes. According to the method, the coal consumption is reduced, the emission pollution is reduced, the energy utilization efficiency is improved, the deep peak regulation capacity is enhanced, and the low-load economy and the system stability are remarkably improved.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 900° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, thermal energy storage systems are used to improve efficiency and reduce carbon emissions associated with processing materials or other industrial applications.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the energy storage system provides higher-temperature heat to a steam cracking furnace system for converting a hydrocarbon feedstock into cracked gas, thereby increasing the efficiency of the temperature control.

A master-slave type multi-unit cooperative decoupling system, comprising a master unit thermal system, a slave unit thermal system and a decoupling steam delivery main pipe; the master unit and the slave unit each comprise a boiler, a high-pressure cylinder, a medium-pressure cylinder and a low-pressure cylinder to form a thermal system; the master unit boiler reheater hot end outlet is connected to the decoupling steam delivery main pipe, and the decoupling steam delivery main pipe is connected to the slave unit reheater cold end inlet; the master unit uses output reheated steam to assist the slave unit to perform unit-boiler decoupling operation; on this basis, if the master unit is reformed to perform unit-boiler decoupling, the whole plant decoupling can be realized; the system has simple configuration, reliable switching, good performance-price ratio, high steam and heat supply guarantee rate and strong anti-accident capability; under the decoupling working condition, the decoupling high bypass is opened and has large flow, the steam turbine flow is small, and when the steam turbine is tripped, the original high bypass flow is small, the impact on the boiler is weakened.

The invention relates to a steam discharge box, in particular to a marine multi-stage bypass discharge box, and belongs to the technical field of marine steam temperature and pressure reduction. The marine multistage bypass discharge box aims at solving the problems that in the prior art, cooling water is sprayed into high-temperature steam in most desuperheaters, but nozzles are prone to being blocked due to the water quality problem, the maintenance requirement is high, or temperature distribution is uneven. The steam desuperheater comprises a steam inlet, a first-stage pressure reduction structure, a second-stage pressure reduction structure, a third-stage pressure reduction structure, a final-stage box body structure and a plurality of desuperheating water assemblies, the steam inlet is connected with an inlet of the first-stage pressure reduction structure, the first-stage pressure reduction structure is inserted into a box body of the final-stage box body structure and extends into the final-stage box body structure, the second-stage pressure reduction structure and the third-stage pressure reduction structure are installed in the final-stage box body structure, and the second-stage pressure reduction structure and the third-stage pressure reduction structure are arranged outside an outlet of the first-stage pressure reduction structure from inside to outside in a sleeving mode. And a plurality of desuperheating water assemblies for desuperheating and decompressing are mounted on the final-stage box body structure.

An energy storage system converts variable renewable electricity (VRE) to continuous heat at over 1000° C. 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. Groups of thermal storage arrays may be controlled and operated at high temperatures without thermal runaway via deep-discharge sequencing. Forecast-based control enables continuous, year-round heat supply using current and advance information of weather and VRE availability. High-voltage DC power conversion and distribution circuitry improves the efficiency of VRE power transfer into the system.

To provide a steam generating device and a steam generating method that can generate high-pressure steam from exhaust heat of low-pressure fluid with high efficiency.SOLUTION: A steam generating device comprises: a compressor for sucking and compressing steam; a condensate pipe for merging water separated from steam discharged from the compressor, with steam to be sucked by the compressor; and a pressure reducer provided in the condensate pipe, and for reducing the pressure of water flowing through the condensate pipe. Preferably, the steam generating device comprises an upstream compressor for compressing steam to be sucked by the compressor, and has a structure in which low-pressure steam is compressed by the two compressors.SELECTED DRAWING: Figure 1

The invention discloses a coal-fired thermal power generating unit deep peak shaving system capable of reducing the station service power consumption rate, and relates to the technical field of flue gas waste heat utilization. Comprising a boiler, a steam ejector, a steam turbine high-pressure cylinder, a superheater reheater and a steam turbine intermediate-pressure cylinder, the system can flexibly extract ejected steam and ejected steam at the positions of a plurality of superheaters and reheaters, steam with different parameters is obtained according to working condition requirements, and it is ensured that a unit can still operate efficiently and stably during deep peak shaving. Steam with proper parameters is provided for the steam-driven induced draft fan and the steam-driven water feeding pump, so that switching to electric driving under low load is avoided, the station service power consumption rate is reduced, and the economical efficiency is improved. Low-quality reheat steam is efficiently utilized through the steam ejector, steam exhausted by the steam-driven induced draft fan is merged into a low-pressure steam supply system, and gradient utilization of heat is achieved. By reducing the steam flow of the second-stage superheater, the third-stage superheater, the first-stage reheater and the second-stage reheater, the temperature of main steam and reheated steam is increased, and the problem of insufficient steam temperature under low load is effectively solved.

The invention discloses an ammonia-doped reaction-based oil-gas turbine working medium modification and power improvement structure, relates to the technical field of oil-gas energy utilization, and solves the problem of poor expansion power capability of an oil-gas working medium in an existing oil-gas turbine. The premixer is provided with a gas inlet, a nozzle ring and a gas outlet; the ammonia gas storage tank introduces ammonia gas into the premixer through a nozzle ring to be mixed with oil gas, and the mixed gas is discharged from a gas outlet to enter the oil gas turbine; the oil-gas turbine is connected with the generator through a rotating shaft; a gas outlet of the oil-gas turbine is communicated with the combustion chamber; the nozzle ring comprises a plurality of ammonia gas nozzles, the ammonia gas nozzles are movably arranged on the premixer, and the spraying direction of ammonia gas in the premixer is adjusted through the ammonia gas nozzles. The injection flow direction of ammonia gas is changed according to the main flow velocity of an oil gas working medium, the expansion power capability of fuel pyrolysis gas can be improved, and the turbine performance is better improved.

A process for producing hydrogen is described, comprising: (i) subjecting a gaseous mixture comprising hydrocarbons and steam to steam reforming in a gas-heated reformer or an adiabatic pre-reformer, followed by autothermal reforming with an oxygen-rich gas in an autothermal reformer to produce a reformed gas mixture; (ii) increasing the hydrogen content of the reformed gas mixture by subjecting the reformed gas mixture to one or more water-gas shift stages in a water-gas shift unit to provide a hydrogen-rich reformed gas; (iii) passing the hydrogen-rich reformed gas and the oxygen-rich gas through an oxidation unit comprising an oxidation catalyst that converts carbon monoxide present in the hydrogen-rich reformed gas to carbon dioxide to form a carbon dioxide-rich gas mixture; (iv) cooling the carbon dioxide-rich gas mixture and separating condensed water therefrom; and (v) passing the carbon dioxide-rich gas mixture to a carbon dioxide separation unit to provide a carbon dioxide gas stream and a hydrogen product gas stream.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 1000° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, the TES provides higher-temperature heat through non-combustible fluid to an alumina calcination system used to remove impurities or volatile substances and / or to incur thermal decomposition to a desired product.

Provided herein are methods and systems for generating steam. The methods may comprise circulating a first working fluid through a first heat pump cycle, circulating a second working fluid through a second heat pump cycle, and transferring heat from said first working fluid to said second working fluid in a heat exchanger coupled to the first heat pump cycle and the second heat pump cycle. In some embodiments, the first heat pump cycle receives heat from an ambient air stream.

An energy storage system (TES) converts variable renewable electricity (VRE) to continuous heat at over 900° C. Intermittent electrical energy heats a solid medium. Heat from the solid medium is delivered continuously on demand. Heat delivery via flowing gas establishes a thermocline which maintains high outlet temperature throughout discharge. The delivered heat which may be used for processes including power generation and cogeneration. In one application, thermal energy storage systems are used to improve efficiency and reduce carbon emissions associated with processing materials or other industrial applications.

The invention discloses a gas turbine-split-flow self-condensation transcritical carbon dioxide combined cycle system. An inlet of a carbon dioxide working medium splitter in a split-flow self-condensation transcritical carbon dioxide power bottom cycle system is connected with a carbon dioxide outlet of an ejector injection pressurization self-condensation system. A first outlet is connected with a cold side inlet of the carbon dioxide heater, and is heated, acted by a high-temperature turbine and reheated to a first inlet of the carbon dioxide mixer; the hot side of the heater is connected with a gas turbine exhaust outlet which is communicated with the environment. A second outlet is connected with a cold side inlet of the heat regenerator and reaches a second inlet of the mixer after acting of the low-temperature turbine, and an outlet of the mixer is connected back to the ejector injection pressurization self-condensation system. According to the invention, a novel working medium shunting and ejector structure combined cycle structure is introduced, so that efficient conversion of exhaust waste heat of the wide-temperature-range gas turbine at different environment cold source temperatures can be realized while self-condensation of a carbon dioxide working medium is ensured, and the combined cycle waste heat utilization efficiency is improved.