15 results about "Multistage compressor" patented technology

The present invention relates to a boil-off gas reliquefaction system for a ship. The boil-off gas reliquefaction system for a ship according to the present invention, whereby boil-off gas generated from a liquefied natural gas (LNG) storage tank for a ship is reliquefied, comprises: a first heat exchanger for recovering cold heat from a first boil-off gas generated in the storage tank; a multi-stage compressor for compressing the boil-off gas that has passed through the heat exchanger; a high-pressure gas line for supplying high-pressure gas that is supplied from the multi-stage compressor; a low-pressure gas line for supplying the boil-off gas, which is supplied from the multi-stage compressor, as a low-pressure gas by using a decompression valve; a second heat exchanger in which heat exchange occurs between the high-pressure gas line and the low-pressure gas line downstream of the decompression valve; and a third heat exchanger by which the boil-off gas that has passed through the second heat exchanger is cooled by means of heat medium oil of a cryogenic chiller.

This invention is a method for the production and distribution of compressed air in organized industrial zones (OIZs), specifically involving the centralized production of compressed air using energy-efficient turbo compressors and its transmission to industrial facilities via high-pressure conveying lines. The method aims to produce compressed air more efficiently and minimize energy losses during transport, thanks to the low energy consumption and multi-stage compression mechanism of turbo compressors. This method also ensures fair and accurate billing based on the measurement of compressed air consumption supplied to industrial facilities. Each industrial facility is equipped with high-accuracy meters to precisely measure the amount of compressed air consumed. Data from these meters is collected and processed in real time via a central control system. Billing is then based solely on the amount of air consumed. The system aims to reduce operating costs through energy efficiency and low maintenance costs, as well as to ensure environmental sustainability by reducing carbon emissions. The fact that turbo compressors offer lower energy consumption and maintenance requirements compared to screw compressors increases the overall efficiency of this method and provides economic advantages.

The application discloses a pipeline structure for multistage compressor series connection, which comprises a first pipe body and a second pipe body connected with each other, a first cavity, a second cavity and a third cavity are sequentially arranged in the first pipe body along the length direction, the cross-sectional dimension of the second cavity is smaller than that of the third cavity; a fourth cavity and a fifth cavity are sequentially arranged in the second pipe body along the length direction, the cross-sectional dimension of the fourth cavity is smaller than that of the third cavity; a valve body is slidably arranged in the third cavity, the length of the valve body is smaller than the depth of the third cavity, and a flow channel communicating with the third cavity and the fourth cavity is arranged in the valve body. The application can automatically increase the pressure of the gas when the pressure of the gas is small, and can automatically make part of the gas directly jump over the pressure increasing stage when the pressure of the gas is large, which is beneficial to optimizing the load distribution and effectively improving the pressure increasing efficiency and the cycle transfer efficiency of the multistage compressor.

The application discloses a flue gas carbon dioxide capturing and conveying integrated system, and relates to the technical field of carbon dioxide capturing.The carbon dioxide capturing and conveying integrated system comprises a pretreatment and absorption module, an integrated processing module, a refining and liquefaction module and an energy management and control module, the pretreatment and absorption module is used for preliminarily treating flue gas and absorbing CO2 in the flue gas, the integrated processing module comprises a multistage compressor unit, a desorption tower and a closed heat pump circulation system, the closed heat pump circulation system is used for transmitting heat generated by the multistage compressor unit to the desorption tower, the refining and liquefaction module is used for refining CO2 gas desorbed and obtaining liquid CO2 used for conveying through liquefaction, and the energy management and control module is used for dynamic regulation and control of each module.The capturing and conveying integrated system can realize integrated, efficient and compact processing from flue gas to conveyable liquid CO2 product through process depth coupling and modular design.

The application discloses a compressed air energy storage-fused salt heat storage comprehensive energy system and an operation method thereof, and belongs to the technical field of energy conversion and energy storage. The system comprises a multi-stage compressor unit, a fused salt-air heat exchanger group, a high-temperature fused salt tank, a low-temperature fused salt tank, a high-pressure gas storage well, an expander, a generator, a regional heat supply heat exchange unit, a heat network circulating pump, a water supplement device and an inter-stage reheating flow channel. The multi-stage compressor unit is connected with the high-pressure gas storage well through the fused salt-air heat exchanger group, and the low-temperature fused salt tank and the high-temperature fused salt tank form a heat storage loop through the fused salt-air heat exchanger group. The outlet of the high-temperature fused salt tank is divided into two paths, one of which is connected with the expander through the inter-stage reheating flow channel, and the other of which is connected with the regional heat supply heat exchange unit to form a closed heating loop. The expander is coaxially connected with the generator, and the air inlet of the expander is connected with the high-pressure gas storage well. The application realizes large-temperature-difference external heat supply while improving the power generation efficiency through high-temperature fused salt heat storage and double-path heat distribution.

This invention proposes a photovoltaic-driven compressed air energy storage system with multi-stage compression and segmented heat recovery. The system includes: photovoltaic modules, a multi-stage compressor unit, a thermal storage heat exchanger, a high-temperature thermal storage tank, a low-temperature thermal storage tank, a regenerative heat exchanger, an expander, and an ORC unit. The photovoltaic modules supply power to the multi-stage compressor unit, which compresses the gas and stores it in the gas storage tank. Part of the heat generated is stored in the high-temperature contact tank and the low-temperature thermal storage tank through two thermal storage heat exchangers. The gas storage tank then feeds the high-pressure gas into the expander for expansion and work, driving a generator to produce electricity. Part of the waste heat from the expander's exhaust gas is fed into the ORC unit for secondary power generation, realizing waste heat utilization. This invention achieves efficient utilization and long-term energy storage of photovoltaic energy, significantly improving energy efficiency and operational safety, and solving the problems of low efficiency, large heat loss, and insufficient regulation capacity in traditional compressed air energy storage systems.

This application discloses a system and method for producing cryogenic cooling capacity based on carbon dioxide, belonging to the field of pipeline transportation technology. The system includes: a multi-stage compressor, a first heat exchanger, an absorption chiller, a regenerator, a second heat exchanger, a booster pump, and an expander. By processing the input room-temperature gaseous carbon dioxide through a series of steps, the system can output cryogenic gaseous carbon dioxide that provides cryogenic cooling capacity for the cryogenic distillation process of carbon dioxide. By using this cryogenic carbon dioxide to replace liquid ammonia as a refrigerant, not only is the problem of the difficulty in obtaining cryogenic cooling capacity in the cryogenic distillation process solved, but the hazards are also reduced, making the refrigeration process more energy-efficient and environmentally friendly.

The application provides a refrigeration system and a control method thereof. The refrigeration system comprises a main circuit, an air supplement branch and a liquid supplement branch. The main circuit is connected with a multi-stage compressor, a condenser, an economizer, a main throttling element and an evaporator through pipelines. The air supplement branch is connected with an air outlet of the economizer and an intermediate stage air inlet of the multi-stage compressor through a pipeline. The liquid supplement branch is connected with the intermediate stage air inlet of the multi-stage compressor from a section of the main circuit with high-pressure liquid-phase refrigerant. According to the refrigeration system and the control method thereof, liquid-phase refrigerant can be introduced when the vibration or noise of the unit exceeds the limit through the design of the liquid supplement branch. The liquid-phase refrigerant in the form of droplets can effectively absorb the sound wave energy in the pipeline of the compressor, thereby reducing the overall exhaust pulsation of the compressor and ultimately reducing the noise and vibration at the condenser.

Disclosed herein is a system for compressing a working fluid. The system includes a rotary driver in rotary communication with a shaft of a compressor. The compressor includes: a casing arrangement; and a first compressor section in the casing arrangement, the first compressor section including a multiple-stages with a rotating impeller running at a high speed. At least one of the casing arrangement or the first compressor impeller includes a material that is resistant to corrosion by carbon dioxide or hydrogen. The compressor is operative to compress syngas to a pressure in the range of 50 to 120 bar.

This invention discloses an optimized design method for improving the performance and reducing the cost of a compressed air energy storage power station heat exchange system. The compressed air energy storage power station heat exchange system includes a compression energy storage system and a bypass system. The compression energy storage system includes a multi-stage compression mechanism and a multi-stage expansion mechanism. The multi-stage compression mechanism includes multiple compressor units, and the multi-stage expansion mechanism includes multiple turbines. The bypass system includes a water-to-water heat exchanger arranged between two series-connected gas-to-water heat exchangers. The water-side pipeline includes a pumping bypass and a mixing pipeline. Cold water from a cold water storage tank enters a gas-to-water heat exchanger for primary gas-to-water heat exchange. The water after heat exchange is divided into a main pipeline and branch pipelines. The water from the branch pipelines enters a plate heat exchanger via the pumping bypass to exchange heat with water in a cold open water tank. The cooled water from the branch pipelines enters the mixing pipeline. The cold side of the water-to-water heat exchanger is connected to both the cold open water tank and the hot open water tank. The optimized design method for improving the performance and reducing the cost of a compressed air energy storage power station heat exchange system provided by this invention has the advantages of high heat exchange efficiency and low cost.

The present application relates to the field of environmental protection equipment, especially a biomass energy equipment with carbon capture and storage, comprising an absorbent storage unit, an adaptive capture unit arranged on one side of the absorbent storage unit, a rich liquid pump arranged on one side of the adaptive capture unit, a rich liquid preheating unit arranged on one side of the rich liquid pump, a carbon dioxide desorption unit arranged on one side of the rich liquid preheating unit, and a multi-stage compressor arranged on one side of the carbon dioxide desorption unit, wherein the present application establishes an energy consumption model based on the detection data of the carbon dioxide concentration sensor and the gas flow rate sensor, dynamically adjusts the ammonia solution circulation amount and the heat input of the reboiler, realizes on-demand capture and energy optimization, and avoids unnecessary energy consumption caused by excessive capture; the lean liquid is introduced into the heat exchanger body to exchange waste heat with the rich liquid, preheats the rich liquid, and improves the energy utilization rate of the device.

This invention discloses a segmented oil injection and cleaning system for multi-stage compressors, relating to the field of compressor oil injection and cleaning technology. The system includes a base; a metering pump mounted on top of the base; an oil reservoir vertically fixed in the central positioning area of ​​the base, with a nitrogen inlet and an oil injection inlet at the top, and an oil outlet at the bottom connected to the suction port of the metering pump via a sealed pipeline; three sets of oil injection branches branching from the main oil outlet pipe of the metering pump, corresponding to the first, second, and third intake pipes of the multi-stage compressor; and a pressure regulating unit located on each oil injection branch for independently regulating the output oil pressure of the corresponding branch. This invention, through the synergy of three independent oil injection branches and the pressure regulating unit, accurately adapts to the pressure differences of each intake pipe, solving the problems of incomplete cleaning or oil waste associated with traditional single-pressure output systems. The integrated design simplifies installation and maintenance and improves system reliability.

The present disclosure relates to a high-concentration carbon dioxide capture system and method utilizing a deep eutectic solvent. The high-concentration carbon dioxide capture system utilizing a deep eutectic solvent according to the present disclosure comprises a multi-compressor for compressing flue gas; an absorber configured to receive flue gas compressed by the multi-compressor and to capture carbon dioxide contained in the flue gas using an absorbent; a first flash configured to receive the absorbent that has captured carbon dioxide from the absorber and to remove gases other than carbon dioxide captured in the absorbent; a second flash configured to receive the absorbent from the first flash and to heat the received absorbent to desorb carbon dioxide captured in the absorbent; and a third flash configured to receive compressed gas discharged from the second flash and to separate carbon dioxide from the received fluid and supply it to a storage tank, wherein the absorbent may be a deep eutectic solvent.

The application discloses a system and method for air compression energy storage coupled flexible peak regulation of coal power base, and belongs to the technical field of thermal power generation. The system comprises a motor, a multistage compressor, a high-low temperature molten salt storage tank, a mine injection-production well group, a compressed air heat exchanger, a multistage turbine and a generator, and a supporting thermal power unit. The redundant new energy and the redundant power of the unit load reduction preferentially drive the compressor to compress air, and the balance is used to heat the low-temperature molten salt. The low-temperature molten salt is used for cooling between compressor stages. The air storage is constructed by relying on the abandoned mine of the coal power, and the compressed air is stored by injection wells. In the energy release stage, the air storage is drawn out from the extraction well, is heated and warmed by the heat exchanger first, the heat source preferentially uses the high-temperature molten salt, the molten salt heat is insufficient, the thermal power unit is extracted to divert the high-temperature flue gas of the smoke chamber for heat supplement, the flue gas after heat exchange and temperature reduction flows back to the end of the flue gas; the warmed compressed air drives the turbine to drive the generator to be connected to the grid to generate electricity, so that the coal power deep peak regulation and the new energy consumption are coordinated.