61results about "Steam regeneration" patented technology

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.

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.

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.

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.

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.

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.

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

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.

According to the garbage power generation cooling system and the power station, circulating water in a first circulating water pipeline sequentially flows through a second heat exchange channel of a condenser and a fourth heat exchange channel of a first heat exchanger, when flowing through the second heat exchange channel, the circulating water takes away heat of steam flowing through the first heat exchange channel, and when flowing through the fourth heat exchange channel, the circulating water takes away heat of steam flowing through the first heat exchange channel; and the heat is transferred to the low-temperature LNG in the third heat exchange channel, so that the low-temperature LNG is gasified. And circulating water in the second circulating water pipeline sequentially flows through a cooling water channel in the auxiliary machine and a fourth heat exchange channel of the first heat exchanger, takes away heat of the auxiliary machine when flowing through the cooling water channel of the auxiliary machine, and transfers the heat to the low-temperature LNG in the third heat exchange channel to gasify the low-temperature LNG when flowing through the fourth heat exchange channel. According to the garbage power generation cooling system provided by the invention, the low-pressure low-temperature steam acting in the steam turbine and the auxiliary machine are cooled by utilizing the cold energy of the low-temperature LNG, so that the cold energy of the LNG is effectively utilized.

The thermal power generating unit is characterized in that an outlet of a main steam pipeline is communicated with an inlet of the front cylinder, an inlet of the high-pressure cylinder and an inlet of a reheater, and the outlet of the main steam pipeline is communicated with an inlet of a front cylinder bypass adjusting valve through a front cylinder bypass; an outlet of the front cylinder bypass regulating valve is communicated with an industrial steam supply pipeline through a steam supply pressure regulating valve and a second desuperheater, the outlet of the front cylinder bypass regulating valve is communicated with an inlet of a reheater through a steam ejector and a first desuperheater, and an outlet of the front cylinder is communicated with an inlet of a low-pressure cylinder through a first steam exhaust check valve; an outlet of the high-pressure cylinder is communicated with an inlet of the reheater through the high-exhaust check valve, an outlet of the reheater is communicated with the steam ejector and an inlet of the medium-pressure cylinder, an outlet of the low-pressure cylinder is communicated with the condenser, and the unit can improve the peak load regulation capacity of the thermal power generating unit, the heat efficiency of the cylinders in the low load state and the steam supply capacity in the low load state.

Carnot battery with simplified charging cycle by an ejector ensuring cooling production. The invention relates to a Carnot battery comprising a drive cycle for converting thermal energy into electricity and a simplified ejector-equipped refrigeration cycle (SERS) comprising a working fluid circulation refrigeration circuit comprising three branches arranged in parallel: • a drive branch and • a refrigeration branch, and • a mixing branch on which is arranged an ejector for ensuring the mixing of the working fluid from the drive branch and the working fluid from the refrigeration branch, and the battery comprising a thermal energy storage module comprising a fluid for storing cold thermal energy and forming the source to be cooled for the refrigeration branch.The storage module is thermally connected to the condenser of the engine cycle, ensuring the transfer of cold thermal energy from the fluid stored in the energy storage module to the engine cycle.

The application relates to a carbon dioxide gas recovery system and recovery method in a Brayton cycle, the recovery system comprising a cooler, a first compressor, a gas collecting tank, a second compressor, a heat exchanger, an expander and a separator connected in sequence through pipelines, the upper end of the separator being connected to the cooler through a pipeline, a mixed gas inlet pipe and a condensate water outlet pipe being connected to the cooler, and the lower end of the separator being connected to the heat exchanger through a pipeline. The recovery system collects the mixed gas in the Brayton cycle system, separates and processes the pure carbon dioxide gas, and sends the carbon dioxide gas into the Brayton cycle system again, so that the leakage and the supplement are balanced in theory.

The application provides a heat and power cogeneration unit heat supply extraction steam residual pressure utilization system, which comprises a gas supply unit and a heating unit, wherein the gas supply unit comprises a boiler (4), a high-pressure cylinder (1) communicated with the boiler (4), a medium-pressure cylinder (2) communicated with the high-pressure cylinder (1), and a low-pressure cylinder (3) communicated with the medium-pressure cylinder (2); the system further comprises a residual pressure utilization unit, which comprises a vortex tube (10) connected with the medium-pressure cylinder (2) through an extraction steam pipe (31); the system further comprises a heat network heat exchanger, and hot gas flow at a hot end of the vortex tube (10) sequentially passes through a hot end pipe (34), the heat network heat exchanger (7) and a return pipe (35) into a condenser (6); a cold end of the vortex tube (10) is connected into the condenser (6) through a cold end pipe (36); and a heat user (8) is connected to the heat network heat exchanger (7) through a heat exchange pipeline (37); because the vortex tube separates the inflow of the extraction steam pipe into cold gas flow or gas-liquid mixture with lower temperature and hot gas flow with higher temperature, the temperature of the hot gas flow after entering the heat network heat exchanger is higher than the temperature of the traditional extraction steam, and the larger heat transfer temperature difference means that, under the premise of constant heat exchange amount of the heat exchanger, the heat exchanger area can be greatly reduced, and the investment cost and land occupation of the heat exchanger are reduced; meanwhile, the product at the cold end outlet directly enters the condenser, and the required cold load of the condenser is also reduced, and the operation cost of the air cooler is reduced.

The utility model provides a thermal power generating unit four-stage cascade heating and heat supply system. The thermal power generating unit four-stage cascade heating and heat supply system comprises a high-back-pressure condenser, a steam increasing machine condenser and a four-stage heating channel formed by parallel heat supply network heaters which are sequentially connected in series. The steam increasing machine condenser comprises a front half part and a rear half part which are connected in series; the first-stage heat exchange tube bundle is arranged on the front half part of the steam increasing machine condenser, the second-stage heat exchange tube bundle is arranged on the rear half part of the steam increasing machine condenser, and the first steam increasing machine and the second steam increasing machine are arranged in parallel. And the outlet of the condenser is respectively connected with the front half throat part and the rear half throat part of the steam increasing machine condenser. According to the scheme, the comprehensive performance of the heat supply system of the thermal power generating unit is remarkably improved through the cooperative operation of the four-stage cascade heating system and the double steam increasing engines and the multi-unit combined supply design.

The invention belongs to the technical field of thermal power generating units, and discloses a thermal power generating unit dead steam total recovery steam circulation system and method.The system comprises a boiler, a steam turbine, a back pressure type steam turbine, a steam compressor and a steam mixer; an outlet of the boiler is connected with an inlet of the steam turbine, a dead steam outlet of the steam turbine is connected with an inlet of the steam compressor, a steam extraction pipeline of the steam turbine is connected with an inlet of the back pressure type steam turbine, and an outlet of the steam compressor and an outlet of the back pressure type steam turbine are both connected with the steam mixer. An inlet of the steam pump is connected with the steam mixer, an outlet of the steam pump is connected with the boiler, an outlet of the steam mixer is connected with the boiler, dead steam discharged by the steam turbine does not need to be cooled, condensed and discharged, all the dead steam enters the steam compressor for parameter improvement and then participates in circulation again, and cold source loss of the dead steam in the condensation process is fundamentally eliminated; the energy of the steam is fully recovered, and the heat efficiency of the thermal power generating unit is remarkably improved.

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 invention relates to the technical field of steam turbines, in particular to a steam turbine shaft seal air leakage recycling system which comprises a heat exchanger, a pressure release valve, an air guide pipe, a pressure maintaining valve, a base, a transfer tank, a steam inlet pipe and a purification assembly. A heat exchanger is arranged at the end, close to the transfer tank, of the top of the base, a pressure release valve is arranged between the output end of the side edge of the transfer tank and a steam inlet of the heat exchanger, and an air guide pipe is installed at the output end of the top of the transfer tank. A pressure stabilizing valve is installed on the air guide pipe, and the air guide pipe is communicated with a shaft seal of equipment such as a pump and a fan. According to the steam turbine shaft seal air leakage recycling system, shaft seal air leakage can be treated and recycled conveniently, and economic benefits are improved.

An apparatus includes one or more thermal storage blocks that define a radiation chamber and a fluid flow slot positioned above the radiation chamber to define a fluid pathway in a first direction. The apparatus includes a heater element positioned adjacent to the radiation chamber in a second, different direction, wherein the radiation chamber is open on at least one side to the heater element. The apparatus includes a fluid movement system configured to direct a stream of fluid through the fluid pathway in the first direction.