LU505336B1 - Polygeneration system of cold, heat, electricity, and water based on compressed air energy storage - Google Patents
Polygeneration system of cold, heat, electricity, and water based on compressed air energy storage Download PDFInfo
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- LU505336B1 LU505336B1 LU505336A LU505336A LU505336B1 LU 505336 B1 LU505336 B1 LU 505336B1 LU 505336 A LU505336 A LU 505336A LU 505336 A LU505336 A LU 505336A LU 505336 B1 LU505336 B1 LU 505336B1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 230000005611 electricity Effects 0.000 title claims abstract description 40
- 238000004146 energy storage Methods 0.000 title claims abstract description 35
- 239000007789 gas Substances 0.000 claims abstract description 116
- 239000002028 Biomass Substances 0.000 claims abstract description 92
- 241001474374 Blennius Species 0.000 claims abstract description 73
- 238000002485 combustion reaction Methods 0.000 claims abstract description 53
- 239000002918 waste heat Substances 0.000 claims abstract description 35
- 239000013505 freshwater Substances 0.000 claims abstract description 31
- 238000005338 heat storage Methods 0.000 claims abstract description 27
- 238000002309 gasification Methods 0.000 claims abstract description 22
- 238000000746 purification Methods 0.000 claims abstract description 19
- 238000010411 cooking Methods 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims description 130
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 38
- 239000003546 flue gas Substances 0.000 claims description 38
- 238000011084 recovery Methods 0.000 claims description 33
- 238000010992 reflux Methods 0.000 claims description 27
- 238000000465 moulding Methods 0.000 claims description 19
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 16
- 238000010248 power generation Methods 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 230000006835 compression Effects 0.000 claims description 15
- 238000007906 compression Methods 0.000 claims description 15
- 239000000446 fuel Substances 0.000 claims description 15
- 238000005057 refrigeration Methods 0.000 claims description 14
- 238000010612 desalination reaction Methods 0.000 claims description 13
- 239000003507 refrigerant Substances 0.000 claims description 13
- 239000013535 sea water Substances 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 11
- 238000004821 distillation Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 238000004321 preservation Methods 0.000 claims description 6
- 230000003134 recirculating effect Effects 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 238000007493 shaping process Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000032258 transport Effects 0.000 abstract 1
- 238000012045 magnetic resonance elastography Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- -1 cold energy Substances 0.000 description 2
- 238000004200 deflagration Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/463—Gasification of granular or pulverulent flues in suspension in stationary fluidised beds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
- C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0903—Feed preparation
- C10J2300/0909—Drying
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0916—Biomass
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0956—Air or oxygen enriched air
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
- C10J2300/0973—Water
- C10J2300/0976—Water as steam
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
- C10J2300/1643—Conversion of synthesis gas to energy
- C10J2300/165—Conversion of synthesis gas to energy integrated with a gas turbine or gas motor
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1671—Integration of gasification processes with another plant or parts within the plant with the production of electricity
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1681—Integration of gasification processes with another plant or parts within the plant with biological plants, e.g. involving bacteria, algae, fungi
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/1693—Integration of gasification processes with another plant or parts within the plant with storage facilities for intermediate, feed and/or product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
- F02G5/02—Profiting from waste heat of exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a polygeneration system of cold, heat, electricity, and water based on compressed air energy storage, which comprises a seaweed biomass pretreatment subsystem, a seaweed biomass gasification purification subsystem, an internal combustion engine subsystem, an underwater compressed air energy storage subsystem, a compressed heat storage subsystem, a solar collector/storage subsystem and a waste heat utilization subsystem. The invention uses compressed air to store the surplus marine renewable energy power in low power consumption, and generates electricity through gasification of marine renewable energy devices and seaweed biomass in peak power consumption, and then utilizes expansion work to generate electricity in peak power consumption, thus meeting the power demand of users; the waste heat utilization subsystem uses the waste heat of different parts of the integrated system to generate cold energy, fresh water and hot water to meet the needs of users for cold and hot water; the seaweed biomass gasification subsystem transports biomass gas to the gas supply pipe network to provide cooking gas for users and meet the gas demand of users.
Description
POLYGENERATION SYSTEM OF COLD, HEAT, ELECTRICITY,
AND WATER BASED ON COMPRESSED AIR ENERGY
STORAGE
The invention relates to the technical field of renewable energy and energy storage, and in particular to a polygeneration system of cold, heat, electricity, and water based on compressed air energy storage.
The development of new energy sources, the realization of energy transformation, the reduction of fossil energy consumption and the construction of a green and low-carbon energy system are among the most important ways to reduce carbon dioxide emissions and achieve global carbon neutrality. Marine renewable energies (MRES) usually refers to wave energy, tidal energy, tidal current energy, temperature difference energy and salt difference energy; broadly speaking, it also includes marine biomass energy, offshore wind energy and offshore solar energy existing on the ocean surface. Furthermore, MREs with natural, clean, renewable, predictable and reliable energy characteristics will become an important alternative energy source during the energy transition period.
According to the report "Marine Renewable Energy Helps Blue Economy
Development" issued by the International Renewable Energy Agency (IRENA), it is pointed out that the total power generation potential of all marine energy technologies is 45,000 - 130,000 TWh, which means that marine energy can meet more than twice the current global power demand. However, MREs are unsteady, intermittent, and stochastic, which leads to the instability of power generation. Energy storage technologies have played a big part in the realization of stable power generation for
MREs. Underwater compressed air energy storage system using hydrostatic pressure has the advantages of high efficiency (- 71%) and high energy density. Underwater compressed air energy storage (UWCAES), which may efficiently integrate a variety 7505996 of energy sources in islands, coastal cities, and off-shore platforms, is a promising utility-size energy storage system for MREs.
There are abundant renewable energy sources such as light, wind, marine biomass and waves around ocean islands. However, at present, offshore islands still depend on diesel and gas engines for power generation, which is not conducive to the sustainable development of oceanic islands because of the high cost of power generation, high emissions, high pollution and the inability to bear large-scale loads.
Effectively utilizing the marine renewable energy around ocean islands and converting it into composite resources such as electricity, fresh water, energy storage, cold energy, heat and gas, as well as establishing an integrated energy supply system for ocean islands/offshore platforms that can operate independently and stably will provide an energy guarantee for the construction of ocean islands/offshore platforms with different functions such as residents, tourism, fisheries, transit bases and national defence, which is an urgent need to strengthen maritime sovereignty and practice the strategy of maritime power.
The purpose of the present invention is to provide an underwater compressed air energy storage system for cold, heat, electricity and water polygeneration based on marine renewable energy, which combines the abundant marine renewable energy around ocean islands to generate electricity comprehensively, and integrates the waste heat of the system to generate cold and hot water and seaweed biomass gasification to generate cooking gas, so as to meet the needs of users for cold, heat, electricity and water, and improve the comprehensive utilization efficiency of energy.
In order to achieve the above purpose, the invention provides a polygeneration system of cold, heat, electricity, and water based on compressed air energy storage, which includes: a seaweed biomass pretreatment subsystem for shaping dried seaweed biomass raw materials;
a seaweed biomass gasification purification subsystem for gasifying seaweed 7505996 biomass moulding fuel to generate seaweed biomass syngas, purifying and storing the seaweed biomass syngas, and conveying the seaweed biomass syngas to an external pipe network; an internal combustion engine subsystem for deflagrating the seaweed biomass syngas to drive the engine to generate electricity; an underwater compressed air energy storage subsystem for storing the surplus marine renewable energy power when the power consumption is low, and releasing high-pressure air to do work and generate electricity when the power consumption is high; a compressed heat storage subsystem for recovering and storing sensible heat contained in compressed air by using heat transfer oil, and heating air and fresh water by using the hot heat transfer oil; a solar collector/storage subsystem for storing solar energy by using molten salt, and heating high-pressure low-temperature air and fresh water by using hot molten salt to generate steam; and a waste heat utilization subsystem for generating cold energy, fresh water and hot water by using waste heat from different subsystems; where the seaweed biomass pretreatment subsystem, the seaweed biomass gasification purification subsystem, the internal combustion engine subsystem, the underwater compressed air energy storage subsystem, the compressed heat storage subsystem, the solar collector/storage subsystem and the waste heat utilization subsystem are connected in sequence.
Optionally, the seaweed biomass pretreatment subsystem includes a hot air dryer and a curing moulding device; the hot air dryer is sequentially connected with the curing moulding device; the hot air dryer is used for drying seaweed biomass raw materials by using hot air in the compressed thermal storage subsystem, and the curing moulding device is used for shaping the dried seaweed biomass raw materials.
Optionally, the seaweed biomass gasification purification subsystem includes a biomass preheater, a fluidized bed gasifier, a raw gas cooler, a purification and dust removal device, a roots blower, a safety water seal device and a gas storage tank; 7505996 where the biomass preheater, the fluidized bed gasifier, the raw gas cooler, the purification and dust removal device, the roots blower, the safety water seal device and the gas storage tank are connected in sequence; the biomass preheater is used for preheating the seaweed biomass moulding fuel by using the hot air in the oil heat exchanger; the raw gas cooler is used for heating the air as a gasifying agent by using the waste heat of the syngas at the outlet of the fluidized bed gasifier, where the gasifying agent is water vapor generated by a molten salt hot steam generator and hot air 10° generated by the raw gas cooler in a preset mass ratio as an air-water vapor gasifying agent; the seaweed biomass syngas in the gas storage tank is respectively delivered to the gas supply pipe network and the internal combustion engine subsystem, and the seaweed biomass syngas delivered to the gas supply pipe network is used for providing cooking gas and gas for power generation of the gas internal combustion engine; the seaweed biomass syngas delivered to the internal combustion engine subsystem is combusted in the internal combustion engine, and the heat released after combustion includes high-temperature flue gas and recycled cylinder liner water.
Optionally, the internal combustion engine subsystem includes an air filter, a gas internal combustion engine and a generator; where the air filter and the generator are respectively connected with the gas internal combustion engine; the air filter is used for filtering out particulate impurities in the air; the gas internal combustion engine is used for mixing the seaweed biomass syngas at the outlet of the gas storage tank and the air at the outlet of the air filter according to a preset ratio to form a mixed fuel, and converting the chemical energy of the fuel into kinetic energy; the generator drives the generator to rotate by utilizing the crankshaft of the gas internal combustion engine, and converts kinetic energy into electric energy.
Optionally, the underwater compressed air energy storage subsystem includes an air compressor, a check valve, a flexible gas storage device, a pressure regulating valve, an air expander and a reflux heat exchanger I; the air expander is connected 7505996 with the reflux heat exchanger I, the flexible gas storage device is connected with the check valve and the pressure regulating valve respectively, the check valve is connected with the last-stage aftercooler of the compressor, and the pressure 5 regulating valve is connected with the reflux heat exchanger I; where the reflux heat exchanger I is used for preheating the air flowing out of the flexible gas storage device; the air compressor is used for electric drive by utilizing marine renewable energy; the air compressor includes three turbines connected in parallel, and the turbines comprise a first-stage compressor, a second-stage compressor and a third-stage compressor; the air compressors are used for improving the compression efficiency by adopting three-stage compression, interstage and last-stage cooling methods; the air expander includes a first-stage expander, a second-stage expander and a third-stage expander, and the air expanders adopt a three-stage expansion and intermediate heating method to improve power generation efficiency.
Optionally, the compression heat storage subsystem includes two compressor interstage coolers, a compressor last-stage aftercooler, a hot oil tank, a hot oil pump, two oil heat exchangers, a cold oil tank and a cold oil pump; where the compressor interstage coolers include a first cooler and a second cooler, the oil heat exchangers include a first oil heat exchanger and a second oil heat exchanger, and the compressor last-stage aftercooler, the compressor interstage coolers and the oil heat exchangers all adopt compact fin-tube heat exchanger; the cold oil tank, the cold oil pump, the compressor interstage coolers, the hot oil tank, the hot oil pump and the oil heat exchangers are connected in sequence, where the first cooler and the second cooler are connected in parallel, the compressor interstage coolers and the hot oil tank are respectively connected in parallel with the compressor last-stage aftercooler, and the first oil heat exchanger and the second oil heat exchanger are connected in parallel; the sensible heat contained in the air in the compressed heat storage subsystem after passing through the air compressor is recovered and stored in the hot oil tank; the hot oil from the hot oil tank flows into the oil heat exchangers, and the air heated by 7505996 the first oil heat exchanger is used as the hot air source of the hot air dryer and the preheating of the seaweed biomass moulding fuel feed in the fluidized bed gasifier; the fresh water heated by the second oil heat exchanger enters the heat recovery steam generator.
Optionally, the solar collector/storage subsystem includes a solar collector, a hot salt tank, three molten salt heat exchangers, a molten salt hot steam generator, a cold salt tank and a molten salt pump; the molten salt pumps include a cold salt pump and a hot salt pump; the molten salt heat exchangers include a first molten salt heat exchanger, a second molten salt heat exchanger and a third molten salt heat exchanger, and both the molten salt heat exchangers and the molten salt hot steam generator adopt compact fin-tube heat exchangers; where the solar collector, the hot salt tank, the hot salt pump, the molten salt heat exchangers, the cold salt tank and the cold salt pump are sequentially connected, where the molten salt heat exchangers and the cold salt tank are respectively connected in parallel with the molten salt hot steam generator, and the first molten salt heat exchanger, the second molten salt heat exchanger and the third molten salt heat exchanger are connected in parallel; the solar collector uses solar energy to heat molten salt entering through the cold salt pump, and the heated molten salt is respectively stored in the hot salt tank; it then enters the molten salt heat exchangers through the hot salt pump to heat air and enters the molten salt hot steam generator to heat fresh water to generate steam, and the released molten salt is stored in the cold salt tank.
Optionally, the waste heat utilization subsystem includes a recirculating cylinder liner water unit, a flue gas heat storage unit, an organic Rankine cycle (ORC) and ejector cycle unit, a low-temperature multi-effect distillation seawater desalination unit and a steam heat utilization unit; the recirculating cylinder liner water unit is respectively connected with the gas internal combustion engine and the heat preservation water tank in the waste heat utilization subsystem; the flue gas heat storage unit is respectively connected with the 7505996
ORC and ejector cycle unit, the low-temperature multi-effect distillation seawater desalination unit and the heat preservation water tank, and the steam heat utilization unit is connected with the molten salt hot steam generator in the solar collector/storage subsystem; where the flue gas heat storage unit includes a heat recovery steam generator I, a heat recovery steam generator II and a flue gas/water heat exchanger, and the steam heat utilization unit includes a lithium bromide absorption refrigeration unit and a plate heat exchanger; the waste heat from the flue gas thermal storage unit flows into the ORC and ejector cycle unit to drive the ORC cycle to generate electricity and the ejector refrigeration cycle to generate cold energy; then the low-grade flue gas at the outlet of the heat recovery steam generator, the raw gas cooler, the hot air at the outlet of the reflux heat exchanger and the hot water at the outlet of the second oil heat exchanger flow into the heat recovery steam generator II to drive the low-temperature multi-effect distillation seawater desalination unit to produce fresh water, and the flue gas afterheat at the outlet of the heat recovery steam generator II drives the flue gas/water heat exchanger to produce hot water; the steam from the steam heat utilization unit drives the lithium bromide absorption refrigeration unit to generate cold energy in summer, and the plate heat exchanger is used to supply heat load to users in non-summer season.
Optionally, the ORC and ejector cycle unit includes an ORC subunit and an ejector cycle subunit, and the ORC subunit is respectively connected with the flue gas heat storage unit and the ejector cycle subunit; where the ORC subunit includes a turbine, a condenser I, a working medium pump I, a reflux heat exchanger II and a heat exchanger I; the turbine, the heat exchanger I, the reflux heat exchanger II, the condenser I and the working medium pump I are connected in sequence; the ejector cycle subunit includes a heat exchanger II, an ejector, an evaporator, an expansion valve, a condenser II and a working medium pump II; the heat exchanger II, the ejector, the evaporator, the expansion valve and the working medium 7505996 pump II are sequentially connected, and the expansion valve and the working medium pump II are respectively connected in parallel with the condenser II, the ORC subunit utilizes the heat recovery steam generator I to recover the heat of the flue gas discharged by the gas internal combustion engine, converts the organic fluid into saturated steam, and then expands in the turbine to generate power to push the generator to generate electricity; the toluene steam at the outlet of the turbine recovers its energy through the heat exchanger I, where the reflux heat exchanger II is used to heat the remaining energy at the inlet of the heat recovery steam generator I, and the organic fluid returns to the heat recovery steam generator I after passing through the condenser I and the working medium pump I; the ejector cycle subunit utilizes the heat recovered by the heat exchanger II from the overheated flow at the turbine outlet to evaporate the liquid refrigerant, and the refrigerant vapor and the refrigerant flow brought out from the evaporator as the power flow are mixed with the ejector, then flow to the condenser II, and release heat to cooling water for condensation; where the refrigerant concentrated flow of the condenser is divided into two flows: one part is vaporized in the evaporator by absorbing heat from the cooling medium after being expanded in the expansion valve, and the other part is pumped back to the heat exchanger II by the working medium pump II to form a primary air flow.
Compared with the prior art, the invention has the following advantages and technical effects: 1. The invention makes full use of abundant marine renewable energy resources such as wind energy, solar energy, seaweed biomass energy, wave energy, etc. around ocean islands according to local conditions, and uses compressed air to store redundant marine renewable energy power when the electricity consumption is low, and deeply integrates the two, thus realizing efficient utilization of marine renewable energy, reducing fossil energy consumption and avoiding environmental pollution; 2. The invention makes the most of the waste heat from different parts of the integrated system, and generates electric energy, cold energy, fresh water, heating or domestic hot water through the ORC, ejector cycle/lithium bromide absorption 7505996 refrigeration cycle, low-temperature multi-effect seawater desalination unit and heat exchanger, thus improving the utilization efficiency of heat energy and realizing cascade recycling of waste heat; 3. The flat and curved rectangular winglet vortex generators with common-flow-up (CFU) configuration installed on the fin surface of the compact fin tube heat exchanger are used to reduce the weak area behind the heat exchange tube, improve the flow resistance characteristics and heat exchange performance of the compact fin-tube heat exchanger, and enhance the heat exchange performance and comprehensive performance of the compact fin-tube heat exchanger; 4. The invention effectively utilizes the marine renewable energy around the ocean island and the waste heat of the integrated system, and converts them into composite resources such as electricity, energy storage, gas, cold energy, fresh water, heating and the like, thus establishing an integrated energy supply system for the ocean island/offshore platform that can operate independently and stably, and providing a powerful energy guarantee for the construction of the ocean island/offshore platform with different functions such as residents, tourism, fishery, transit base and national defence.
The accompanying drawings, which constitute a part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application, and do not constitute an improper limitation of this application. In the attached drawings:
FIG. 1 is a schematic diagram of the overall structure of a polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a waste heat utilization subsystem according to an embodiment of the present invention; and
FIG. 3 is a schematic diagram of a compact fin-tube heat exchanger according to an embodiment of the present invention. 7505996
It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail with reference to the attached drawings and examples.
It should be noted that the steps shown in the flowchart of the accompanying drawings may be executed in a computer system such as a set of computer-executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order from here.
The invention provides a polygeneration system of cold, heat, electricity, and water based on compressed air energy storage, as shown in FIG. 1. The system includes a seaweed biomass pretreatment subsystem, a seaweed biomass gasification purification subsystem, an internal combustion engine subsystem, an underwater compressed air energy storage subsystem, a compressed heat storage subsystem, a solar collector/storage subsystem and a waste heat utilization subsystem.
The integrated system uses compressed air to store the surplus marine renewable energy power in low power consumption, generates electricity through marine renewable energy devices and deflagration of seaweed biomass syngas in the gas internal combustion engine in peak power consumption, and then expands high-pressure air in an air expansion unit to generate electricity in peak power consumption, thus meeting the power demand of users.
The seaweed biomass pretreatment subsystem includes a hot air dryer and a curing moulding device; the hot air dryer is sequentially connected with the curing moulding device, the hot air dryer is used for drying seaweed biomass raw materials by using hot air in the compressed thermal storage subsystem, and the curing moulding device is used for shaping the dried seaweed biomass raw materials.
The seaweed biomass gasification purification subsystem includes a biomass preheater, a fluidized bed gasifier, a raw gas cooler, a purification and dust removal 7505996 device, a roots blower, a safety water seal device and a gas storage tank; where the biomass preheater, the fluidized bed gasifier, the raw gas cooler, the purification and dust removal device, the roots blower, the safety water seal device and the gas storage tank are connected in sequence;
The biomass preheater is used for preheating the seaweed biomass moulding fuel by using the hot air in the oil heat exchanger; the raw gas cooler is used for heating the air as a gasifying agent by using the waste heat of the syngas at the outlet of the fluidized bed gasifier, where the gasifying agent is water vapor generated by a molten salt hot steam generator and hot air generated by the raw gas cooler in a preset mass ratio as an air-water vapor gasifying agent, the seaweed biomass syngas in the gas storage tank is respectively delivered to the gas supply pipe network and the internal combustion engine subsystem, and the seaweed biomass syngas delivered to the gas supply pipe network is used for providing cooking gas and gas for power generation in the gas internal combustion engine; the seaweed biomass syngas delivered to the internal combustion engine subsystem is combusted in the internal combustion engine, and the heat released after combustion includes high-temperature flue gas and recycled cylinder liner water.
The internal combustion engine subsystem includes an air filter, a gas internal combustion engine and a generator; where the air filter and the generator are respectively connected with the gas internal combustion engine; the air filter is used for filtering out particulate impurities in the air; the gas internal combustion engine is used for mixing the seaweed biomass syngas at the outlet of the gas storage tank and the air at the outlet of the air filter according to a preset ratio to form a mixed fuel, and converting the chemical energy of the fuel into kinetic energy; the generator drives the generator to rotate by utilizing the crankshaft of the gas internal combustion engine, and converts the kinetic energy into electric energy.
The underwater compressed air energy storage subsystem includes an air compressor, a check valve, a flexible gas storage device, a pressure regulating valve,
an air expander and a reflux heat exchanger I; the air expander is connected with the 7505996 reflux heat exchanger I, the flexible gas storage device is connected with the check valve and the pressure regulating valve respectively, the check valve is connected with the last-stage aftercooler of the compressor, and the pressure regulating valve is connected with the reflux heat exchanger I; where the reflux heat exchanger I is used for preheating the air flowing out of the flexible gas storage device, the air compressor is used for the electric drive by utilizing marine renewable energy; the air compressor includes three turbines connected in parallel, and the turbines comprise a first-stage compressor, a second-stage compressor and a third-stage compressor; the air compressor is used for improving the compression efficiency by adopting three-stage compression and interstage and last-stage cooling methods; the air expander includes a first-stage expander, a second-stage expander and a third-stage expander, and the air expander adopts a three-stage expansion and intermediate heating method to improve the power generation efficiency.
The compression heat storage subsystem includes two compressor interstage coolers, a compressor last-stage aftercooler, a hot oil tank, a hot oil pump, two oil heat exchangers, a cold oil tank and a cold oil pump; the cold oil tank, the cold oil pump, the compressor interstage coolers, the hot oil tank, the hot oil pump and the oil heat exchangers are connected in sequence, where the first cooler and the second cooler are connected in parallel, the compressor interstage coolers and the hot oil tank are respectively connected in parallel with the compressor last-stage aftercooler, and the first oil heat exchanger and the second oil heat exchanger are connected in parallel; the heat exchange tubes of the first cooler are respectively connected with the cold oil tank and the hot oil tank, and the fin channels of the first cooler are respectively connected with the first-stage compressor and the second-stage compressor; the heat exchange tubes of the second cooler are respectively connected with the cold oil tank and the hot oil tank, and the fin channels of the second cooler are respectively connected with the second-stage compressor and the third-stage compressor;
the heat exchange tube of the last-stage aftercooler is connected with the cold oil 7505996 tank and the hot oil tank respectively, and the fin channel of the second cooler is connected with the third-stage compressor and the check valve respectively; the oil inlet of the hot oil tank is respectively connected with the first cooler, the second cooler and the last-stage aftercooler, and the oil outlet of the hot oil tank is connected with the hot oil pump; the hot oil pump is respectively connected with the hot oil tank, the first oil heat exchanger and the second oil heat exchanger; the heat exchange tubes of the first oil heat exchanger are respectively connected with a hot oil pump and a cold oil pump, 10° and the fin channels of the first oil heat exchanger are respectively connected with air, the hot air dryer and the preheater; the heat exchange tubes of the first oil heat exchanger are respectively connected with the hot oil pump and the cold oil tank, and the fin channels of the first oil heat exchanger are respectively connected with the air, the hot air dryer and the preheater; the heat exchange tubes of the second oil heat exchanger are respectively connected with the hot oil pump and the cold oil tank, and the fin channels of the second oil heat exchanger are respectively connected with the fresh water and the heat recovery steam generator II; the cold oil tank is respectively connected with the first oil heat exchanger, the second oil heat exchanger and the cold oil pump; the cold oil pump is respectively connected with the cold oil tank, the compressor last-stage cooler, the second cooler and the first cooler.
The sensible heat contained in the air in the compressed heat storage subsystem after passing through the air compressor is recovered and stored through the hot oil tank; the hot oil in the hot oil tank enters the oil heat exchanger, and the air heated by the first oil heat exchanger is used as the hot air source of the hot air dryer and the preheating of the seaweed biomass moulding fuel feed in the fluidized bed gasifier; the fresh water heated by the second oil heat exchanger enters the heat recovery steam generator.
The solar collector/storage subsystem includes a solar collector, a hot salt tank,
three molten salt heat exchangers, a molten salt hot steam generator, a cold salt tank 7505996 and a molten salt pump; the molten salt pump includes a cold salt pump and a hot salt pump; the molten salt heat exchangers include a first molten salt heat exchanger, a second molten salt heat exchanger and a third molten salt heat exchanger, and both the molten salt heat exchangers and the molten salt hot steam generator adopt compact fin-tube heat exchangers; the solar heat collector is respectively connected with the cold salt pump and the hot salt tank; the hot salt tank is respectively connected with the solar collector and the hot salt pump; the hot salt pump is respectively connected with the hot salt tank, the molten salt hot steam generator and the molten salt heat exchangers; the heat exchange tubes of the first, second and third molten salt heat exchangers and the molten salt hot steam generator are respectively connected with the hot salt pump and the cold salt tank, and the fin channels of the first molten salt heat exchanger are respectively connected with a reflux exchanger I and a first-stage expander; the fin channels of the second molten salt heat exchanger are respectively connected with the first-stage expander and the second-stage expander; the fin channels of the third molten salt heat exchanger are respectively connected with the second-stage expander and the third-stage expander, and the fin channels of the molten salt hot steam generator are respectively connected with the fresh water, a three-way valve (FIG. 2) and a fluidized bed gasifier.
The cold salt tank is respectively connected with the molten salt hot steam generator, the molten salt heat exchangers and the hot salt pump; the cold salt pump is respectively connected with the cold salt tank and the solar collector.
The waste heat utilization subsystem includes a recirculating cylinder liner water unit, a flue gas heat storage unit, an organic Rankine cycle and ejector cycle unit, a low-temperature multi-effect distillation seawater desalination unit and a steam heat utilization unit; the flue gas heat storage unit is connected with the organic Rankine cycle and ejector cycle unit and the low-temperature multi-effect distillation seawater desalination unit; the recirculating cylinder liner water unit is respectively connected 7505996 with the gas internal combustion engine, the fresh water and the heat preservation water tank; the flue gas heat storage unit includes a heat recovery steam generator I, a heat recovery steam generator II and a flue gas/water heat exchanger, and the steam heat utilization unit includes a lithium bromide absorption refrigeration unit and a plate heat exchanger; the waste heat from the flue gas thermal storage unit flows into the organic
Rankine cycle and ejector cycle unit to drive the ORC for cycle power generation and the ejector to circulate refrigeration to generate cold energy; then the low-grade flue gas at the outlet of the heat recovery steam generator, the raw gas cooler, the hot air at the outlet of the reflux heat exchanger and the hot water at the outlet of the second oil heat exchanger flow into the heat recovery steam generator II to drive the low-temperature multi-effect distillation seawater desalination unit to produce fresh water, and finally the flue gas afterheat at the outlet of the heat recovery steam generator II drives the flue gas/water heat exchanger to produce hot water. The steam from the steam heat utilization unit drives the lithium bromide absorption refrigeration unit to generate cold energy in summer, and the plate heat exchanger is used to supply heat load to users in non-summer season.
The hot air dryer in the seaweed biomass pretreatment subsystem uses part of the hot air from the first oil-heat exchanger to dry seaweed biomass raw materials until the water content drops below 20%; the seaweed biomass gasification and purification subsystem uses water vapor generated by the molten salt hot steam generator and hot air generated by the raw gas cooler as gasification agents in the best mass ratio.
The gasification agent, using part of the water vapor generated by the molten salt hot steam generator and the hot air generated by the raw gas cooler as the air-water vapor gasification agent in the best mass ratio, thus improving the quality, calorific value and gasification efficiency of seaweed biomass gasification.
The biomass preheater uses part of the hot air of the first oil-heat exchanger to preheat biomass particles until the water content drops below 10%.
The raw gas cooler 1s used for heating the air used as the gasifying agent of the gasifier by using the waste heat of the high-temperature syngas at the outlet of the 7505996 fluidized bed gasifier.
The heat, which was released by the seaweed biomass syngas in the internal combustion engine subsystem after combustion in the gas internal combustion engine, includes high-temperature flue gas and recycled cylinder liner water to prevent the gas internal combustion engine from overheating. The biomass syngas in the gas storage tank is transported to the gas supply pipe network by the pressure generated by the gas storage tank counterweight to provide users with cooking gas and gas internal combustion engine power generation gas, so as to realize stable external gas supply and power supply.
In the internal combustion engine subsystem, the air filter and the generator are respectively connected with the gas internal combustion engine.
The air compressors in the underwater compressed air energy storage subsystem are driven by the surplus marine renewable energy in the power consumption trough; the air compressors include a first air compressor, a second air compressor and a third air compressor.
In order to utilize the waste heat of the expanded air, the reflux heat exchanger is placed behind the third-stage expander, and the recovered heat is used to preheat the high-pressure and low-temperature air flowing out of the flexible gas storage device.
Marine renewable energy includes at least one of solar energy, wind energy, marine biomass energy and wave energy; considering the limited island area, the marine renewable energy power generation equipment adopts bladeless fan, floating photovoltaic panel, seaweed biomass fluidized bed gasifier and oscillating buoy wave power device respectively.
The air compressor adopts three-stage compression and interstage and last-stage cooling methods, and the air expander adopts three-stage expansion and intermediate heating methods, thus improving compressor efficiency and power generation. The air compressor sets adopt the same compression ratio, thus minimizing the required compression power. The air compressor set consists of three parallel turbines (axial, hybrid or centrifugal compressors).
The inter-stage cooler and the last-stage aftercooler of the air compressor set 7505996 exchange heat with the heat-conducting oil from the cold oil tank by using the air compression heat at the outlets of the first air compressor, the second air compressor and the third air compressor, and the hot oil after heat storage is stored in the hot oil tank.
The sensible heat contained in that compressed air in the compress heat storage subsystem after being compressed by the first air compressor, the second air compressor and the third air compressor is recovered and stored in a heat conducting oil tank; the hot oil enters the first oil heat exchanger to heat air and the second oil heat exchanger to heat fresh water, and part of the air heated by the first oil heat exchanger is used as the hot air source of the hot air dryer in the seaweed biomass gasification purification subsystem to dry the seaweed biomass raw materials, and part of the air is used for preheating the seaweed biomass moulding fuel feed in the fluidized bed gasifier; the fresh water heated by the second oil heat exchanger enters the heat recovery steam generator II to drive the low-temperature multi-effect seawater desalination unit.
The solar collector/storage subsystem uses solar energy to heat molten salt and stores it in a hot salt tank, and part of the hot molten salt enters the first molten salt heat exchanger, the second molten salt heat exchanger and the third molten salt heat exchanger to heat the high-pressure and low-temperature air, so as to increase the temperature of the air entering the air expansion unit; part of the hot molten salt enters the molten salt hot steam generator to heat fresh water to generate steam.
The saturated steam at the outlet of the molten salt hot steam generator is partly used as a gasifying agent in the fluidized bed gasifier; part of it is used in the waste heat utilization subsystem, which drives the lithium bromide absorption refrigeration unit to generate cold energy in summer, and supplies heat load (heating or domestic hot water) to users in other seasons, as shown in FIG. 2.
The waste heat utilization subsystem uses the waste heat of flue gas, which firstly flows into the heat recovery steam generator-driven organic Rankine cycle and ejector cycle unit to produce cold energy during mid-peak hours and peak hours; then the low-grade flue gas, the hot air at the outlet of the raw gas cooler and the reflux 7505996 heat exchanger and the hot water at the outlet of the second oil heat exchanger flow into the second heat recovery steam generator and the low-temperature multi-effect distillation seawater desalination unit to produce fresh water. In addition, the excess heat from different parts of the subsystem heats fresh water and stores it in the heat preservation water tank to meet the heat demand of users.
The organic Rankine cycle (ORC) consists of a turbine, a condenser I, a working medium pump I, a reflux heat exchanger II, a heat exchanger I and a heat exchanger
IT.
The organic Rankine cycle subunit utilizes the heat recovery steam generator I to recover the heat of the flue gas discharged by the gas internal combustion engine, and converts the organic fluid into saturated steam, and then expands in the turbine to generate power to push the generator to generate electricity; the toluene steam at the outlet of the turbine recovers its energy through the heat exchanger I, where the heat exchanger II is used to provide saturated steam for the jet refrigeration cycle in summer, and the heat exchanger I is used to heat fresh water and provide hot water in other seasons. The reflux heat exchanger II is used to heat the remaining energy at the inlet of the heat recovery steam generator I, and the organic fluid returns to the heat recovery steam generator I after passing through the condenser I and the working medium pump I; the organic working medium of the ORC cycle is toluene, which can tolerate the high temperature of flue gas and whose performance is higher than that of other organic fluids in this temperature range.
The ejector cycle subunit uses the heat recovered by the heat exchanger II (the generator VG) to evaporate the liquid refrigerant, and the refrigerant steam (primary steam) and the refrigerant flow (secondary steam) brought from the evaporator as the power flow mix with the ejector and flow to the second condenser, and release heat to the cooling water for condensation; where the refrigerant concentrated flow of the condenser 1s divided into two streams, one of which is vaporized in the evaporator by absorbing heat from the cooling medium after expanding in the expansion valve, and the other is pumped back to the heat exchanger II (generator VG) by the working 7505996 medium pump II to form a primary air flow.
The circulating working fluid of the ejector is R123, which is an environment-friendly, non-toxic, non-flammable, non-corrosive and low-pressure refrigerant.
The compressor last-stage aftercooler, the compressor interstage cooler, the oil-heat exchanger, the molten salt heat exchanger, the molten salt hot steam generator and the flue gas/water heat exchanger all adopt a compact fin-tube heat exchanger with four rows of staggered circular tubes, as shown in FIG. 3. In order to improve the comprehensive performance of fin-tube heat exchangers, a new combination of curved and straight rectangular winglet vortex generators is proposed, which are configured to flow upward together on the plate fins.
The system uses compressed air to store the surplus marine renewable energy power in low power consumption, generates electricity through marine renewable energy devices and seaweed biomass gas deflagration in a gas internal combustion engine in peak power consumption, and then expands high-pressure air in an air expansion unit to generate electricity in peak power consumption, thus meeting the power demand of users; the waste heat utilization subsystem uses the waste heat of different parts of the integrated system to generate cold energy, fresh water and hot water, so as to meet the needs of users for cold and hot water; the purified biomass gas stored in the gas storage tank by the seaweed biomass gasification subsystem is transported to the gas supply network to provide cooking gas for users, thus meeting the gas demand of users.
The system can be implemented according to the following steps: 1. Off-peak hours
During off-peak hours (about 12 hours), the surplus electric power of marine renewable energy drives the motor, which drives the compressor unit of the underwater compressed air energy storage subsystem to compress air and consume electric energy. After passing through the compressor, the air pressure and temperature increase, and the air leaving the compressor exchanges heat with the cold heat transfer oil through the compressor interstage cooler and the last aftercooler, and the heat of 7505996 compressed air is then exchanged with the heat transfer oil and stored in the hot oil tank of the compressed heat storage subsystem. After three stages of compression and three times of heat exchange, high-pressure compressed air is transported to the underwater flexible gas storage device through pipelines for constant pressure storage.
At the same time, air exchanges heat with heat-conducting oil in the first oil heat exchanger of the compression heat storage subsystem, and part of the heated air is used as a hot air source of a hot air dryer in the seaweed biomass pretreatment subsystem to dry the dried seaweed biomass raw materials, and then the raw materials are made into biomass particles meeting industry standards by using a curing moulding device; the heat of the hot heat transfer oil is exchanged with air to become cold heat transfer oil, which is stored in the cold oil tank. 2. Mid-peak hours
During the middle and peak hours (8 hours), the seaweed biomass gasification and purification subsystem, internal combustion engine subsystem and waste heat utilization subsystem are operated to meet the needs of users for cold, heat, electricity, fresh water and gas. Biomass particles are preheated by hot air and fed to the fluidized bed gasifier, where they are gasified with a gasification agent to produce syngas. The high-temperature syngas passes through the raw gas cooler and the purification and dust removal device in turn to remove tar, ash and condensed water from the crude gas. The purified synthetic gas is pumped out by Roots blower, stored in gas storage tank with safe water seal, and then transported to the gas supply pipe network by the pressure generated by the gas storage tank counterweight to provide users with cooking gas and gas for power generation in gas internal combustion engines, thus realizing stable external gas supply and power supply. The heat recovery steam generator I, the heat recovery steam generator II uses the waste heat of the gas engine outlet flue gas, hot air at the first outlet of the reflux heat exchanger, hot air at the outlet of the raw gas cooler, hot water at the outlet of the second oil heat exchanger and steam at the outlet of the molten salt hot steam generator to operate the ORC cycle, the low-temperature multi-effect seawater desalination unit, the lithium bromide absorption refrigeration unit (summer) or the plate heat exchanger (other 7505996 seasons); at the same time, in order to reduce the energy loss in the ORC cycle and recover the energy in the outlet flow of the ORC turbine, the heat exchanger II is used to operate the jet refrigeration cycle (summer) or the heat exchanger I, so as to provide users with cold, heat and fresh water and realize the comprehensive utilization of energy. 3. Peak hours
During the peak period of power consumption (4 hours), the high-pressure and low-temperature compressed air stored in the underwater flexible gas storage device is released, preheated by the residual heat of the air at the outlet of the air expander, and exchanged heat with hot molten salt in the molten salt heat exchanger, so that the temperature rises, and the high-temperature and high-pressure air enters the expander to expand and do work, and drives the generator to generate electricity, thus realizing stable power supply to the outside. The operation of the whole integrated system effectively utilizes the marine renewable energy around the ocean island and the residual heat of the integrated system, and converts it into composite resources such as electricity, energy storage, gas, cold energy, fresh water, heating, etc, and establishes an integrated energy supply system for the ocean island/offshore platform that can operate independently and stably.
The above is only the preferred embodiment of this application, but the protection scope of this application is not limited to this. Any change or replacement that can be easily thought of by a person familiar with this technical field within the technical scope disclosed in this application should be included in the protection scope of this application. Therefore, the protection scope of this application should be based on the protection scope of the claims.
Claims (9)
1. A polygeneration system of cold, heat, electricity, and water based on compressed air energy storage, characterized by comprising: a seaweed biomass pretreatment subsystem for shaping dried seaweed biomass raw materials; a seaweed biomass gasification purification subsystem for gasifying seaweed biomass moulding fuel to generate seaweed biomass syngas, purifying and storing the seaweed biomass syngas, and conveying the seaweed biomass syngas to an external pipe network; an internal combustion engine subsystem for deflagrating the seaweed biomass syngas to drive the engine to generate electricity; an underwater compressed air energy storage subsystem for storing the surplus marine renewable energy power when the power consumption is low, and releasing high-pressure air to do work and generate electricity when the power consumption is high; a compressed heat storage subsystem for recovering and storing sensible heat contained in compressed air by using heat transfer oil, and heating air and fresh water by using the hot heat transfer oil; a solar collector/storage subsystem for storing solar energy by using molten salt, and heating high-pressure low-temperature air and fresh water by using hot molten salt to generate steam; a waste heat utilization subsystem for generating cold energy, fresh water and hot water by using waste heat from different subsystems; where the seaweed biomass pretreatment subsystem, the seaweed biomass gasification purification subsystem, the internal combustion engine subsystem, the underwater compressed air energy storage subsystem, the compressed heat storage subsystem, the solar collector/storage subsystem and the waste heat utilization subsystem are connected in sequence.
2. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 1, characterized in that the seaweed biomass pretreatment subsystem comprises a hot air dryer and a curing moulding 7505996 device; the hot air dryer is sequentially connected with the curing moulding device, the hot air dryer is used for drying seaweed biomass raw materials by using hot air in the compressed thermal storage subsystem, and the curing moulding device is used for shaping the dried seaweed biomass raw materials.
3. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 2, characterized in that the seaweed biomass gasification purification subsystem comprises a biomass preheater, a fluidized bed gasifier, a raw gas cooler, a purification and dust removal device, a roots blower, a safety water seal device and a gas storage tank; where the biomass preheater, the fluidized bed gasifier, the raw gas cooler, the purification and dust removal device, the roots blower, the safety water seal device and the gas storage tank are connected in sequence; the biomass preheater is used for preheating the seaweed biomass moulding fuel by using the hot air in the oil heat exchanger; the raw gas cooler 1s used for heating the air as a gasifying agent by using the waste heat of the syngas at the outlet of the fluidized bed gasifier, where the gasifying agent is water vapor generated by a molten salt hot steam generator and hot air generated by the raw gas cooler in a preset mass ratio as an air-water vapor gasifying agent; the seaweed biomass syngas in the gas storage tank is respectively delivered to the gas supply pipe network and the internal combustion engine subsystem, and the seaweed biomass syngas delivered to the gas supply pipe network is used for providing cooking gas and gas for power generation in the gas internal combustion engine; the seaweed biomass syngas delivered to the internal combustion engine subsystem is combusted in the internal combustion engine, and the heat released after combustion comprises high-temperature flue gas and recycled cylinder liner water.
4. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 3, characterized in that the internal combustion engine subsystem comprises an air filter, a gas internal combustion engine and a generator; where the air filter and the generator are respectively connected with 7505996 the gas internal combustion engine; the air filter is used for filtering out particulate impurities in the air; the gas internal combustion engine is used for mixing the seaweed biomass syngas at the outlet of the gas storage tank and the air at the outlet of the air filter according to a preset ratio to form a mixed fuel, and converting the chemical energy of the fuel into kinetic energy; the generator drives the generator to rotate by utilizing the crankshaft of the gas internal combustion engine, and it converts kinetic energy into electric energy.
5. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 4, characterized in that the underwater compressed air energy storage subsystem comprises an air compressor, a check valve, a flexible gas storage device, a pressure regulating valve, an air expander and a reflux heat exchanger I; the air expander is connected with the reflux heat exchanger I, the flexible gas storage device is connected with the check valve and the pressure regulating valve respectively, the check valve is connected with the last-stage aftercooler of the compressor, and the pressure regulating valve is connected with the reflux heat exchanger I; where the reflux heat exchanger I is used for preheating the air flowing out of the flexible gas storage device; the air compressor is used for electric drive by utilizing marine renewable energy; the air compressors comprise three turbines connected in parallel, and the turbines comprise a first-stage compressor, a second-stage compressor and a third-stage compressor; the air compressors are used for improving the compression efficiency by adopting three-stage compression, interstage and last-stage cooling methods; the air expanders comprise a first-stage expander, a second-stage expander and a third-stage expander, and the air expanders adopt a three-stage expansion and intermediate heating method to improve power generation efficiency.
6. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 5, characterized in that the 7505996 compression heat storage subsystem comprises two compressor interstage coolers, a compressor last-stage aftercooler, a hot oil tank, a hot oil pump, two oil heat exchanger, a cold oil tank and a cold oil pump; where the compressor interstage coolers comprise a first cooler and a second cooler, the oil heat exchangers comprise a first oil heat exchanger and a second oil heat exchanger, and the compressor last-stage aftercooler, the compressor interstage coolers and the oil heat exchangers all adopt a compact fin-tube heat exchanger; the cold oil tank, the cold oil pump, the compressor interstage coolers, the hot oil tank, the hot oil pump and the oil heat exchangers are connected in sequence, where the first cooler and the second cooler are connected in parallel, the compressor interstage coolers and the hot oil tank are respectively connected in parallel with the compressor last-stage aftercooler, and the first oil heat exchanger and the second oil heat exchanger are connected in parallel; the sensible heat contained in the air in the compressed heat storage subsystem after passing through the air compressor 1s recovered and stored in the hot oil tank; the hot oil in the hot oil tank enters the oil heat exchanger, and the air heated by the first oil heat exchanger 1s used as the hot air source for the hot air dryer and the preheating of the seaweed biomass moulding fuel feed in the fluidized bed gasifier; the fresh water heated by the second oil heat exchanger enters the heat recovery steam generator.
7. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 6, characterized in that the solar collector/storage subsystem comprises a solar collector, a hot salt tank, three molten salt heat exchanger, a molten salt hot steam generator, a cold salt tank and a molten salt pump; the molten salt pump comprises a cold salt pump and a hot salt pump; the molten salt heat exchangers comprise a first molten salt heat exchanger, a second molten salt heat exchanger and a third molten salt heat exchanger, and both the molten salt heat exchangers and the molten salt hot steam generator adopt compact fin-tube heat exchangers; 7505996 where the solar collector, the hot salt tank, the hot salt pump, the molten salt heat exchangers, the cold salt tank and the cold salt pump are sequentially connected, where the molten salt heat exchangers and the cold salt tank are respectively connected in parallel with the molten salt hot steam generator, and the first molten salt heat exchanger, the second molten salt heat exchanger and the third molten salt heat exchanger are connected in parallel; the solar collector uses solar energy to heat molten salt entering through the cold salt pump, and the heated molten salt is respectively stored in the hot salt tank, enters the molten salt heat exchangers through the hot salt pump to heat air and enters the molten salt hot steam generator to heat fresh water to generate steam, and the released molten salt is stored in the cold salt tank.
8. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 7, characterized in that the waste heat utilization subsystem comprises a recirculating cylinder liner water unit, a flue gas heat storage unit, an organic Rankine cycle and ejector cycle unit, a low-temperature multi-effect distillation seawater desalination unit and a steam heat utilization unit; the recirculating cylinder liner water unit is respectively connected with the gas internal combustion engine and the heat preservation water tank in the waste heat utilization subsystem; the flue gas heat storage unit is respectively connected with the organic Rankine cycle and ejector cycle unit, the low-temperature multi-effect distillation seawater desalination unit and the heat preservation water tank, and the steam heat utilization unit is connected with the molten salt hot steam generator in the solar collector/storage subsystem; where the flue gas heat storage unit comprises a heat recovery steam generator I, a heat recovery steam generator II and a flue gas/water heat exchanger, and the steam heat utilization unit comprises a lithium bromide absorption refrigeration unit and a plate heat exchanger; the waste heat of the flue gas thermal storage unit flows into the organic Rankine cycle and ejector cycle unit to drive the ORC cycle to generate electricity and the 7505996 ejector refrigeration cycle to generate cold energy; then the low-grade flue gas at the outlet of the heat recovery steam generator, the raw gas cooler, the hot air at the outlet of the reflux heat exchanger and the hot water at the outlet of the second oil heat exchanger flow into the heat recovery steam generator II to drive the low-temperature multi-effect distillation seawater desalination unit to produce fresh water, and the flue gas afterheat at the outlet of the heat recovery steam generator II drives the flue gas/water heat exchanger to produce hot water; the steam from the steam heat utilization unit drives the lithium bromide absorption refrigeration unit to generate cold energy in summer, and the plate heat exchanger is used to supply heat load to users in non-summer season.
9. The polygeneration system of cold, heat, electricity, and water based on compressed air energy storage according to claim 8, characterized in that the organic Rankine cycle and ejector cycle unit comprises an organic Rankine cycle subunit and an ejector cycle subunit, and the organic Rankine cycle subunit is respectively connected with the flue gas heat storage unit and the ejector cycle subunit; where the organic Rankine cycle subunit comprises a turbine, a condenser I, a working medium pump I, a reflux heat exchanger II and a heat exchanger I; the turbine, the heat exchanger I, the reflux heat exchanger II, the condenser I and the working medium pump I are connected in sequence; the ejector cycle subunit comprises a heat exchanger II, an ejector, an evaporator, an expansion valve, a condenser II and a working medium pump II, the heat exchanger II, the ejector, the evaporator, the expansion valve and the working medium pump II are sequentially connected, and the expansion valve and the working medium pump II are respectively connected in parallel with the condenser II; the organic Rankine cycle subunit utilizes the heat recovery steam generator I to recover the heat of the flue gas discharged by the gas internal combustion engine, converts the organic fluid into saturated steam, and then expands in the turbine to generate power to push the generator to generate electricity; the toluene steam at the outlet of the turbine recovers its energy through the heat exchanger I, where the reflux heat exchanger II is used to heat the remaining energy at the inlet of the heat recovery 7505996 steam generator I, and the organic fluid returns to the heat recovery steam generator I after passing through the condenser I and the working medium pump I; the ejector cycle subunit utilizes the heat recovered by the heat exchanger II from the overheated flow at the turbine outlet to evaporate the liquid refrigerant, and the refrigerant vapor and the refrigerant flow brought out from the evaporator as the power flow are mixed with the ejector, then flow to the condenser II, and release heat to cooling water for condensation; where the refrigerant concentrated flow of the condenser is divided into two flows: one part is vaporized in the evaporator by absorbing heat from the cooling medium after being expanded in the expansion valve, and the other part is pumped back to the heat exchanger II by the working medium pump II to form a primary air flow.
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| CN202311031311.XA CN116816649B (en) | 2023-08-16 | 2023-08-16 | Underwater compressed air energy storage cold-hot water poly-generation system |
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| EP2253807A1 (en) * | 2008-10-29 | 2010-11-24 | Vítkovice Power Engineering a.s. | Gas turbine cycle or combined steam-gas cycle for production of power from solid fuels and waste heat |
| US11512402B2 (en) * | 2013-02-21 | 2022-11-29 | Faramarz Bairamijamal | High pressure process for CO2 capture, utilization for heat recovery, power cycle, super-efficient hydrogen based fossil power generation and conversion of liquid CO2 with water to syngas and oxygen |
| WO2014161065A1 (en) * | 2013-04-03 | 2014-10-09 | Sigma Energy Storage Inc. | Compressed air energy storage and recovery |
| CA3128752A1 (en) * | 2019-02-08 | 2020-08-13 | Hydrostor Inc. | Reversible heat exchangers in compressed air energy storage systems |
| CN109854318B (en) * | 2019-03-12 | 2023-09-01 | 上海发电设备成套设计研究院有限责任公司 | Biomass direct-fired cogeneration system and method |
| CN114540085A (en) * | 2022-01-27 | 2022-05-27 | 华南理工大学 | Poly-generation system and method for concentrating solar high-temperature gasification of biomass |
| CN116518568A (en) * | 2023-03-02 | 2023-08-01 | 江苏科技大学 | Combined cooling heating and power system integrating solid oxide fuel cell and solar energy and method thereof |
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