26 results about "Kalina cycle" patented technology

The present invention discloses a power generation system utilizing LNG cold energy and industrial waste heat recovery, including an LNG loop, a two-stage ORC / KC integrated power generation system, and a two-stage ORC waste heat recovery system. After the LNG is pressurized by a circulating pump, heat is exchanged with the two-stage ORC / KC integrated power generation system through the LNG loop, and at the same time, the two-stage ORC waste heat recovery system is used to recycle and utilize low-grade industrial waste heat resources. A working method thereof is also provided. The present invention utilizes the Kalina cycle and the organic Rankine cycle to absorb high-temperature and low-temperature industrial waste heat respectively, utilizes LNG cold energy to recover industrial waste heat and converts the two into electrical energy, and performs heat exchange with LNG through multiple working fluids and combined heat exchange with working fluids of each system, thereby improving the comprehensive utilization efficiency of LNG cold energy and realizing reasonable cascade utilization of LNG cold energy and low-grade waste heat resources of steel plants.

The utility model discloses a system for coupling low-temperature coal gas waste heat utilization with ammonia-containing wastewater purification, which relates to the technical field of low-temperature coal gas waste heat utilization and comprises an evaporator, a separation tank, a steam turbine, a generator, a cooler, an ejector, a condenser, a pressure pump, a booster pump, a deamination device, a gas-liquid separator, a cooling device, a preheater and a circulating water preparation device. The evaporator is provided with a hot gas inlet and a cold gas outlet, a first working medium inlet of the evaporator is connected with a first working medium outlet of the booster pump, a second working medium outlet of the evaporator is connected with a second working medium inlet of the separation tank, and an ammonia-rich steam inlet of the steam turbine is connected with an ammonia-rich steam outlet of the separation tank. According to the Kalina cycle principle, ammonia-containing wastewater purification and utilization are coupled, 60%-80% of ammonia water is adopted as a working medium, ammonia-rich steam is used for expansion acting, output work is converted into electric energy for self-use, the rest part can be output outwards, and the energy utilization rate is improved.

According to the energy storage system based on LNG cold energy gradient utilization and waste heat recovery, LNG high-grade cold energy is stored through the cold storage device in the power utilization peak period, and low-grade cold energy is directly used for power generation; cold energy of the LNG is directly subjected to heat exchange with air in the electricity utilization trough period, and meanwhile cold energy of the cold storage device is applied to the air; the cold energy is utilized to the greatest extent, and the energy storage capacity of the system is increased. High-grade heat energy is utilized by heating high-pressure air at an inlet of the expansion machine through waste heat, residual low-grade heat is recycled through Kalina circulation, the energy storage system is based on an energy storage technical route of LNG cold energy gradient utilization and waste heat recycling, the efficiency and capacity of the energy storage system are improved through an external cold source and a heat source, and the energy storage efficiency is improved. And in addition, waste cold and waste heat are utilized in a gradient mode, and the good practical value is achieved.

The invention relates to the technical field of ship ammonia fuel power systems, in particular to an ammonia fuel waste heat and Kalina cycle coupling utilization system which comprises an ammonia fuel supply system and a Kalina cycle system, the ammonia fuel supply system comprises a fuel tank and an engine, and low-temperature ammonia fuel in the fuel tank is conveyed to the engine through a supply pipe to do work; the Kalina circulating system comprises a separator, a steam turbine and a generator, ammonia gas in the ammonia fuel supply system is mixed with exhaust gas through an ammonia gas pipe to form an ammonia water solution, and the ammonia water solution sequentially flows through a second heat exchanger and a third heat exchanger through a pipeline and then enters the separator; ammonia steam is separated from the separator to drive the steam turbine to do work and generate electricity through the generator, and exhaust gas generated after the steam turbine does work is mixed with ammonia gas in the ammonia fuel supply system; high-temperature smoke generated after the engine does work is exhausted after heat exchange through the third heat exchanger through the smoke exhaust pipe, and surplus fuel after the engine does work is subjected to heat exchange through the second heat exchanger through the liquid return pipe and then flows back to the fuel tank.

The embodiment of the present application provides a kind of liquid spray condensing system of ammonia circulating power generation system.The system includes liquid storage tank, working medium pump, spray section, condenser and control valve.By spraying low concentration liquid ammonia into high concentration ammonia vapor, the ammonia concentration is reduced, the condensing effect is ensured, the ammonia vapor is prevented from entering the liquid storage tank, the system back pressure is reduced and the system efficiency is improved.The present application only needs to be simply modified to realize the function of the original Kalina cycle power generation system, and the structure is simple and easy to implement.

The invention provides a light energy-electric energy-chemical energy coupling coal-fired unit system and an operation system. The system comprises a coal-fired power generation subsystem, a photovoltaic-thermochemistry subsystem and a Kalina circulation subsystem. The coal-fired power generation subsystem is connected with the photovoltaic-thermochemistry subsystem, and the photovoltaic-thermochemistry subsystem is connected with the Kalina circulation subsystem; the coal-fired power generation subsystem is used for basic power generation and peak regulation of the whole system; the photovoltaic-thermochemistry subsystem is used for converting solar energy into electric energy through a photovoltaic device and driving a reversible thermochemistry device based on a calcium-based compound by using the electric energy, so that conversion and storage of electric energy-heat energy-chemical energy are realized; the Kalina circulation subsystem is used for waste heat utilization of thermal chemical reaction products. The heat storage / release temperature is matched with the coal-fired system through thermochemical reaction pressure regulation and control, dynamic regulation of the Kalina cycle working medium concentration is combined, the irreversible loss of heat transfer is remarkably reduced, and the comprehensive energy utilization efficiency is improved.

The invention provides a multi-heat source self-adaptive coupling Kara cycle heat supply method and system, and the method comprises the following steps: pressurizing an ammonia water mixture, preheating the pressurized ammonia water mixture, and reheating the preheated ammonia water mixture by using one heat source in multiple heat sources to form a gas-liquid two-phase flow; the gas-liquid two-phase flow is separated, separated ammonia-rich steam is subjected to expansion acting, dead steam generated after acting is mixed with the separated ammonia-poor liquid phase, and a uniform working medium is formed; the working medium and the heat supply working medium are subjected to heat exchange, and finally the cooled working medium is pressurized and preheated again to complete the circulation process; dependence of a traditional heat supply system on high-grade energy is effectively reduced, and the double advantages of energy conservation, consumption reduction and environmental protection are achieved.

The embodiment of the invention provides a liquid spraying condensation system of an ammonia water circulation power generation system. The system comprises a liquid storage tank, a working medium pump, a spraying section, a condenser and a control valve. The low-concentration liquid ammonia water is sprayed into the high-concentration ammonia water vapor, so that the ammonia concentration is reduced, the condensation effect is ensured, the ammonia water vapor is prevented from entering the liquid storage tank, the back pressure of the system is reduced, and the efficiency of the system is improved. And the functions can be realized only by simply transforming the original Kalina cycle power generation system, and the system is simple in structure and easy to implement.

The invention discloses an absorption type combined cooling heating and power system based on a hydrogen fuel cell, the combined supply system comprises a hydrogen fuel cell unit, an organic Rankine cycle subsystem, a Kalina cycle subsystem and a lithium bromide absorption type refrigeration subsystem, the combined supply system utilizes the hydrogen fuel cell unit to carry out electrochemical reaction to generate electric energy, meanwhile, tail gas waste heat generated by the hydrogen fuel cell unit is used as driving force to drive the subsystems to perform power generation, heating or refrigeration functions; an intermediate heat exchanger is further arranged in each subsystem and used for improving the heat efficiency of each subsystem. According to the system, high-concentration hydrogen is provided for the anode of the hydrogen fuel cell through methane reforming hydrogen production, the output of the hydrogen fuel cell is improved, waste heat of the hydrogen fuel cell system is used for supplying power and heat to a user, meanwhile, the refrigeration effect needed by the user is provided, and the comprehensive utilization efficiency of energy is improved.

The invention discloses a process for directly synthesizing dimethyl ether (DME) by taking urban organic wastes as raw materials, preparing synthesis gas (H2, CO and CO2) through gasification and efficiently utilizing residual heat and components. The synthesis gas firstly passes through a Kalina cycle system to recover waste heat and generate power, then the hydrogen content is increased through water vapor shift, and CO2 is captured through a chemical adsorption method to obtain high-purity hydrogen. And the captured CO2 and hydrogen are mixed, preheated and compressed, and then enter a reactor to generate DME, methanol and water under the action of a catalyst. After the reaction product is cooled and subjected to gas-liquid separation, unreacted gas is recycled; and rectifying the liquid-phase product to obtain a DME product, and recycling methanol for reproduction.

The invention discloses a temperature control method and system driven by solar energy and process waste heat. Comprising the steps that solar energy is collected and used as refrigeration energy input of the system; process waste heat energy is collected, process gas is subjected to Kalina cycle to generate electric energy to drive a compressor, or ammonia water is adopted for direct absorption; and the solar energy and / or the process waste heat energy are / is used for providing a low-temperature cold source for temperature control for the air cooler or the water cooler, so that accurate control over the outlet temperature of the air cooler or the water cooler is achieved. According to the invention, the effects of system stability, safe production, energy conservation and emission reduction in the industrial process can be improved.

The invention discloses an organic solid waste recycling economy poly-generation system and an operational research optimization method thereof, and belongs to the technical field of recycling economy, thermal power generation, anaerobic fermentation, waste heat utilization, organic solid waste treatment, insect protein production and operational research optimization. Comprising a circular economy multi-union system composed of an anaerobic fermentation system, a gas internal combustion engine system, a waste heat recovery system, an insect protein production system and a logistics system, and the waste heat recovery system adopts one of multiple waste heat recovery systems of a Kalina cycle, an ORC cycle or an SCO2 Brayton cycle. An organic solid waste treatment system, a biogas power generation system, a waste heat utilization system and an insect protein production system are deeply coupled and supply chain scheduling optimization is carried out, so that the problems of high anaerobic treatment cost of kitchen garbage and serious landfill treatment pollution are solved, and electric energy and protein are produced while pollution and carbon emission are reduced; and the economic benefit of the poly-generation system is improved.

The invention discloses an ammonia-hydrogen coupled distributed comprehensive energy supply system and method. According to the invention, the flue gas waste heat of a hydrogen ammonia gas turbine and a high-temperature direct ammonia solid oxide fuel cell (DA-SOFC) is recycled in a gradient manner, and the flue gas hot water type lithium bromide unit, the organic Rankine cycle, the four-step copper chloride cycle, the Kalina cycle and the like are sequentially adopted for carrying out gradient utilization on the waste heat with different temperature grades; the whole utilization process relates to full-chain waste heat recovery from high temperature to medium and low temperature, so that the energy utilization efficiency is greatly improved compared with that of a traditional system; meanwhile, by means of the recovery system, cold, heat, electricity and hydrogen multi-energy combined supply is achieved, and the energy self-sufficiency rate of the user side is remarkably increased. In addition, ammonia hydrogen energy serves as the core, no fossil energy is involved in the whole chain, and the whole system can achieve near-zero emission of carbon.

The application discloses a biomass fuel-solid oxide fuel cell comprehensive energy system with a CO2 capture function, which comprises a top circulation system and a bottom circulation system; the top circulation system comprises a solid oxide fuel cell, the cathode inlet of the solid oxide fuel cell is communicated with external air, the anode inlet of the solid oxide fuel cell is communicated with biomass gas and water, the cathode outlet of the solid oxide fuel cell is communicated with the permeation side of a water-gas displacement membrane reactor, and the anode outlet of the solid oxide fuel cell is communicated with the supply side of the water-gas displacement membrane reactor; the supply side of the water-gas displacement membrane reactor is communicated with a combustion chamber, and the combustion chamber is directly connected with external oxygen; the bottom circulation system comprises a transcritical carbon dioxide cycle, a Kalina cycle, a humidification-dehumidification device and an organic Rankine cycle; the solid oxide fuel cell tail gas waste heat and liquefied petroleum gas cold energy can be recycled in stages, and the joint supply of fresh water, carbon dioxide, electric power, cold energy and other energy and substances can be ensured.

The roller kiln double-heat-source waste heat recovery Kalina circulation power generation system comprises a kiln body, one end of the kiln body is arranged to be a production waste gas discharge end, the other end of the kiln body is provided with a cooling waste gas discharge end, and a waste gas treatment mechanism is arranged between the production waste gas discharge end and the cooling waste gas discharge end of the kiln body. The waste gas treatment mechanism comprises a flue gas electrostatic dust collector arranged at the production waste gas discharging end and a cooling waste gas induced draft fan arranged at the cooling waste gas discharging end, a Kalina power generation assembly is arranged between the gas discharging end of the flue gas electrostatic dust collector and the gas inlet end of the cooling waste gas induced draft fan, and a cooling mechanism is arranged at the heat regeneration end of the Kalina power generation assembly; and connecting pieces for mutually connecting the waste gas treatment mechanism, the Kalina power generation assembly and the cooling mechanism are arranged among the waste gas treatment mechanism, the Kalina power generation assembly and the cooling mechanism. According to the roller kiln double-heat-source waste heat recovery Kalina circulating power generation system, kiln head smoke and kiln tail cooling waste gas of a kiln are recovered at the same time, so that waste heat resources of the roller kiln are fully utilized, and energy consumption and environmental pollution are reduced.

The invention provides a multi-combined supply system of a zero-carbon data center, relates to the technical field of multi-combined supply systems, and is used for reducing carbon emission of the data center. The multi-combined supply system of the zero-carbon data center comprises an oxidative coupling hydrogen evolution subsystem, a solid oxide fuel cell power generation subsystem, a triple-effect absorption type refrigeration cycle subsystem, a Kalena cycle subsystem and a humidification, dehumidification and desalination subsystem. The oxidative coupling hydrogen evolution subsystem is used for providing prepared hydrogen for the solid oxide fuel cell power generation subsystem, the solid oxide fuel cell power generation subsystem is used for providing power for the data center, and the triple-effect absorption refrigeration cycle subsystem absorbs waste heat of the solid oxide fuel cell power generation subsystem. The Kalina cycle subsystem is used for supplying cold energy generated by the triple-effect absorption type refrigeration cycle subsystem to a data center for refrigeration, and the Kalina cycle subsystem is used for absorbing waste heat of the triple-effect absorption type refrigeration cycle subsystem so as to supply electric power to the oxidative coupling hydrogen evolution subsystem.

The invention discloses an integrated energy system, and mainly relates to the technical field of energy utilization. Comprising an SOFC / GT module, a TCPC circulation module, an LNG cold energy recovery module, a gas-fired boiler module, a Kalina circulation module, an air source heat pump module, a solar photovoltaic photo-thermal module, an energy utilization module and an electricity management center. The comprehensive energy system for coupling the gas-fired boiler with the air source heat pump based on the solid oxide fuel cell, solar energy storage and LNG cold energy utilization is provided, the output energy forms are diversified, and through coupling of multiple modules, energy supply redundancy can be reduced, the utilization rate of equipment in the system can be increased, and the energy supply economical efficiency of the whole system can be improved.

The present invention discloses a Kalina cycle power generation system with variable working fluid, which includes a power generation module and a variable working fluid module. The power generation module includes an expansion generator, a condenser, a working fluid pump, an evaporator, a check valve and a concentration measuring instrument. The expansion generator is connected to the condenser and the evaporator. The check valve is connected to the condenser and the working fluid pump. The concentration measuring instrument is connected between the working fluid pump and the evaporator. The variable working fluid module is connected to both ends of the check valve. The variable working fluid module includes a rectifying component, a transition component, a working fluid tank and a regulating pump. The transition component is arranged between the rectifying component and the working fluid tank. The regulating pump is connected to the working fluid tank and the check valve. This system effectively utilizes the wasted energy by using waste heat resources, protects the ecological environment, and is of great significance for the effective utilization of renewable resources. By adjusting the proportion of ammonia water in the circulating working fluid, the optimal working condition of the system cycle is achieved, and environmental pollution is reduced.

The present invention provides a device and method for improving the efficiency of a cryogenic liquid air energy storage system. The device includes a liquid air energy storage subsystem and a Kalina cycle power generation subsystem; wherein, the liquid air energy storage subsystem includes an energy storage unit, a heat storage tank, a cold energy storage tank and an energy release unit; the cold energy storage tank is adapted to exchange heat with the energy storage unit and the energy release unit; the heat storage tank is adapted to exchange heat with the energy storage unit, the energy release unit and the Kalina cycle power generation subsystem. By setting up the energy storage unit, the heat storage tank, the cold energy storage tank and the energy release unit, the efficient storage and release of heat are realized; by setting up the heat storage tank to exchange heat with the energy storage unit, the energy release unit and the Kalina cycle power generation subsystem, the compression heat collected during the compression process is not only used to heat the air temperature at the inlet of the air turbine, but also used to drive the Kalina cycle power generation subsystem to generate electricity, improving the energy storage efficiency of the entire system. The efficiency of the combined power generation system proposed by the present invention can be increased by 5-10 percentage points.

The invention provides a system utilizing liquefied natural gas cold energy and gas turbine waste heat and an operation method, in the system, a gas turbine heat regenerator is connected with a Kalina cycle heater, and the Kalina cycle heater is connected with a first organic Rankine cycle heater; high-temperature fuel gas subjected to heat exchange in a heat regenerator of the gas turbine sequentially enters a Kalina cycle heater and a first organic Rankine cycle heater to provide heat for bottom cycle; the organic Rankine cycle condenser is connected with the Kalina cycle condenser, and liquefied natural gas sequentially enters the organic Rankine cycle condenser and the Kalina cycle condenser to condense corresponding working media. The system can efficiently and reasonably utilize exhaust waste heat energy of the regenerative gas turbine and cold energy in the gasification process of the liquefied natural gas, waste heat recovery is achieved through stepped utilization, the energy utilization rate is increased, and waste of exhaust heat of the gas turbine and the cold energy of the liquefied natural gas is reduced.

The present invention relates to the technical field of LNG cold energy utilization, and discloses a light hydrocarbon separation coupled cycle power generation system utilizing LNG cold energy, comprising an LNG light hydrocarbon separation system for recovering C2+ light hydrocarbon resources, and an organic Rankine cycle system, a Kalina cycle system, and a natural gas direct expansion system connected to the LNG light hydrocarbon separation system and used for power generation; the present invention effectively improves the thermal efficiency, efficiency and power generation efficiency of the system through the cascade integrated utilization of LNG cold energy; the overall system design of the present invention is reasonable and compact, and has the advantages of safe and flexible control, high efficiency and energy saving, strong practicality and low cost.

A new and innovative power and treated water co-generation system is provided that includes a modified Kalina cycle and a forward osmosis (FO) membrane. The Kalina cycle of the provided system is used for power production, whereas the system's FO process is used for water production. The provided system modifies a typical Kalina cycle to include a more efficient and relatively low-temperature heat source, while still utilizing the same working fluid, which is ammonia-water. The draw solution for the provided system's FO process is also ammonia-water, which is known and efficient for desalination and wastewater treatment. In some aspects, the working fluid of the system may be a specific ammonia-water composition including between 30-95% ammonia. The presently disclosed system combines the Kalina process and the FO process into an improved and innovative heat integration system to minimize energy requirements and enable operation at both small and large scales.

The application discloses a kind of based on kalina cycle's work heat exchange network optimization method, belong to work heat exchange network technical field, including S1 obtain process stream parameter, the property parameter of kalina cycle and other economic data;S2 by comparing the import and export temperature and import and export pressure of stream, the stream is classified;S3 the heat capacity flow rate and enthalpy of each stream are calculated;S4 construct work heat exchange network and the mixed integer nonlinear programming model (including objective function and constraint condition) of kalina (kalina) cycle coupling;S5 with annual total cost TAC minimization as objective function, utilize solver to solve model, obtain optimal work heat exchange network structure and operating parameter.The application adopts above-mentioned one kind based on kalina cycle's work heat exchange network optimization method, can determine optimal heat integration scheme, work exchange configuration and power generation scheduling strategy, realize multi-energy collaborative optimization, to significantly improve the economy and energy efficiency of system.

The present invention discloses a Kalina cycle-based automotive circulation system and control method thereof. The circulation system includes a Kalina cycle unit, a battery waste heat utilization unit, a cabin cooling unit, a cabin heating unit, and a heat and cold supply unit for supplying cooling or heating to the vehicle's cooling or heating components. The battery waste heat utilization unit includes a heat exchanger and the vehicle's fuel cell. The heat exchanger is connected in series between the Kalina cycle unit's high-pressure pump and expander. The cabin cooling unit, cabin heating unit, and heat and cold supply unit are all connected in series to the Kalina cycle unit's circulation pipeline, and the three are connected in parallel. Application of this solution can fully utilize the heat of the fuel cell to generate electricity, cool or heat the vehicle cabin, and heat or cool the vehicle's heating or cooling components, thereby avoiding the environmental hazards of direct battery waste heat discharge.

The present application belongs to the technical field of ocean energy utilization, and particularly relates to a marine temperature difference energy cogeneration system and method capable of adjusting medium concentration. The present application combines ammonia-water Kalina cycle power generation technology and heat pump heating technology, sets up a heat and power cogeneration system with an ammonia-water Kalina cycle power generation unit, a concentration adjusting unit and a heat pump heating unit, absorbs surface seawater heat by the ammonia-water Kalina cycle power generation unit to generate power, and supplies heat by the ammonia-water heat pump cycle. According to the characteristics that the high-temperature surface seawater temperature fluctuates greatly with climate time, the valve opening and closing state of the system is adjusted according to the change of the high-temperature surface seawater temperature, the ammonia gas medium is controlled to enter or lead out of the Kalina power generation unit to change the medium concentration of the Kalina cycle power generation unit, the efficient and reasonable utilization of marine temperature difference energy is realized, the energy comprehensive utilization efficiency of the marine temperature difference energy system is improved, and the carbon emission and the influence on the environment are reduced.

The invention discloses a biomass fuel-solid oxide fuel cell comprehensive energy system with a CO2 trapping function. The biomass fuel-solid oxide fuel cell comprehensive energy system comprises a top circulation system and a bottom circulation system, the top circulation system comprises a solid oxide fuel cell, a cathode inlet of the solid oxide fuel cell is communicated with outside air, an anode inlet of the solid oxide fuel cell is communicated with biomass gas and water, a cathode outlet of the solid oxide fuel cell is communicated with a permeation side of the water-gas replacement membrane reactor, and an anode outlet of the solid oxide fuel cell is communicated with a supply side of the water-gas replacement membrane reactor; the supply side of the water-gas replacement membrane reactor is communicated with the combustion chamber; the combustion chamber is directly connected with external oxygen; the bottom circulation system comprises a transcritical carbon dioxide cycle, a Kalina cycle, a humidifier-dehumidifier and an organic Rankine cycle; the combined supply of various energies and substances such as fresh water, carbon dioxide, electric power, cold energy and the like can be ensured while gradient recovery of tail gas waste heat of the solid oxide fuel cell and cold energy of liquefied petroleum and natural gas is realized.