CN103256081A - Energy comprehensive utilization method based on supercritical air - Google Patents
Energy comprehensive utilization method based on supercritical air Download PDFInfo
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- CN103256081A CN103256081A CN2013101971130A CN201310197113A CN103256081A CN 103256081 A CN103256081 A CN 103256081A CN 2013101971130 A CN2013101971130 A CN 2013101971130A CN 201310197113 A CN201310197113 A CN 201310197113A CN 103256081 A CN103256081 A CN 103256081A
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Abstract
The invention discloses an energy comprehensive utilization method based on supercritical air. The method is suitable for an energy comprehensive utilization system based on the supercritical air. The system comprises an air liquefaction subsystem, an air separation subsystem and an air expanding generating subsystem. The method comprises the following steps that the air liquefaction subsystem liquefies air; the air separation subsystem separates liquefied air to obtain nitrogen and oxygen, the nitrogen is conveyed to the air expanding generating subsystem through a pipeline, the oxygen is stored and/or conveyed to external equipment; the air expanding generating subsystem generates power through the nitrogen provided by the air separation subsystem. Through the method, the nitrogen with high purity flows in main pipelines of the system in most time, energy comprehensive utilization based on the supercritical air is effectively achieved, and service life of the system is prolonged.
Description
Technical field
The present invention relates to the comprehensive utilization of energy field, particularly a kind of comprehensive utilization of energy method based on supercritical air.
Background technique
The energy is the requisite production and subsistence of modern society, ensures the energy stabilizing supply, and improving constantly efficiency of energy utilization is the important foundation of the national economic development and social progress.China's energy is deficient relatively, energy owning amount is in world's reduced levels per capita, and China is in industrialization and urbanization Rapid development stage, to basic raw material demands such as iron and steel, cement, makes the industry of these highly energy-consumings still keep certain growth rigidity.Therefore, solve the recycling of used heat and the waste heat of these industries, the comprehensive utilization ratio that improves the energy is significant.
Along with the energy resource supply growing tension, the cost that energy consumption occupies is increasing for high energy-consuming enterprises influence, have in addition surpass the cost of raw material.Utilize used heat, exhaust heat recovery power generation, both can satisfy the lifelong need for electricity of enterprise to greatest extent, reduce the outsourcing electric weight, can reduce enterprise's cost of production again, increase economic efficiency.
Present existing used heat cogeneration technology comprises: high-temperature residual heat generating, the low-temperature cogeneration of band afterburning, the low-temperature cogeneration of no afterburning.The low-temperature cogeneration of no afterburning is owing to be UTILIZATION OF VESIDUAL HEAT IN without fuel, so more meet energy conservation and environment protection;
The tradition afterheat generating system is based on the system of gas turbine technology exploitation, namely utilize the high-temperature gas of industrial waste heat and waste heat, or utilize 350～450 degree low-temperature waste heat and waste heat gases Celsius, by the certain fossil fuel of afterburning, directly drive the gas turbine generating.Its shortcoming is that energy recovery efficiency is low.System needs fossil fuel that thermal source is provided, and does not meet the energy development requirement.
The low-temperature cogeneration of the no afterburning that occurs is to utilize low-temperature waste heat and waste heat gas in the recent period, reclaims heat energy by SP heat pipe waste heat boiler and AQC heat pipe waste heat boiler, drives the condensing steam turbine generator generating.This method makes final temperature of discharging gas be reduced to 150 degree Celsius, has improved the recovery rate of heat energy, and the system that makes has broken away from fossil fuel substantially.But this method remains a kind of recovery of single energy, and a large amount of heat energy of discharging in the water cooling system for these industry extensive uses still can't reclaim.
Reclaim and also to store the energy that may waste, effectively discharge the energy of storage then, be that each state of the whole world is all in the problem of seeking solution always.
As shown in Figure 1, this is a kind of typical comprehensive utilization of energy system construction drawing based on supercritical air in the prior art.Its concrete reference character is explained referring to disclosed Chinese invention patent application 201210266532.0 and utility application 201220370877.6.Should be based on the comprehensive utilization of energy system of supercritical air, being also referred to as supercritical air energy storage/release can system, comprises accumulation of heat/heat exchanger 2 and cold-storage/heat exchanger 4, and what reflux in the pipeline when energy discharges all is the air before and after the acting of expanding.Airborne oxygen nitrogen mixture can cause Corrosion of Pipeline with aging.
The inventor finds in realizing process of the present invention, although in Chinese patent application 201210266532.0,200910225252.3,201220370877.6 and multiple supercritical air energy storage/release is also disclosed in 201210518522.1 can system, some problems have been solved on the part degree, but what reflux in the pipeline when releasing energy owing to these systems is air always, oxygen wherein causes system pipeline aging fast, the defective that life-span is short, can occur that system cost is also unrecovered to be come but system's problem of ageing failure, and not only need cold-storage heat-exchanger also to need regenerative heat exchanger in these systems, cause system complex, build the high problem of cost.In addition, the existing system majority has only provided air-fluidized means, and for liquefaction back air separable for nitrogen and oxygen, take full advantage of energy resources more and do not propose a solution.Therefore, a kind of system be provided, energy storage can be solved, can effectively release energy again, can also be the more system of efficent use of resources of nitrogen and oxygen with the air separation after the liquefaction, and can make system have the relatively long life-span, so that guarantee can not only cost-recovering, can also bring great economic benefit.
Summary of the invention
Based on above problem, the invention discloses a kind of comprehensive utilization of energy method based on supercritical air, it utilizes property and the heat-exchanger rig of air supercritical state, with the air stored energy that liquefies, carry out nitrogen oxygen then and separate, isolate the higher oxygen of value, make the nitrogen expansion acting, make system release can the time pipeline in main circulation be nitrogen, prolong lifetime of system, thus solve that paddy electricity, wind-powered electricity generation abandon that electricity can not get effectively utilizing and compressed-air energy storage after problem of complex utilization.
For reaching above-mentioned purpose, the invention provides a kind of comprehensive utilization of energy method based on supercritical air, described method is applicable to a kind of comprehensive utilization of energy system based on supercritical air, and described system comprises: air liquefaction subtense angle, air separation subtense angle, gas expansion power generation subtense angle; Described method comprises the steps:
Described air liquefaction subtense angle liquefies to air;
Described air separation subtense angle separates to obtain nitrogen and oxygen to the air after liquefying, and described nitrogen is flowed to described gas expansion power generation subtense angle by pipeline, and described oxygen is stored and/or output to external equipment;
The nitrogen that described gas expansion power generation subtense angle utilizes described air separation subtense angle to provide generates electricity.
The useful technique effect of technique scheme of the present invention is: compare with traditional used heat, afterheat generating system, the comprehensive utilization of energy system has following potential advantage: take all factors into consideration recovery and the utilization of energy, not only improved energy utilization efficiency, can be enterprise simultaneously provides production required raw material and by-product, can be enterprise and reduce cost, create new growth engines.The present invention is dexterously with pressurized air deep cooling oxygen processed, combines with the energy recovery generating, proposed a kind of implementation methods of the comprehensive energy recycling system that life-span is long, efficient is high for highly energy-consuming industries such as metallurgical, cement and thermoelectricitys.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
The comprehensive utilization of energy system construction drawing based on supercritical air of Fig. 1 prior art;
Fig. 2 is the comprehensive utilization of energy system construction drawing based on supercritical air of the embodiment of the invention;
Fig. 3 is the flow chart based on the comprehensive utilization of energy method of supercritical air of the embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention more cheer and bright, below in conjunction with embodiment and with reference to accompanying drawing, the present invention is described in more detail.Should be appreciated that these descriptions are exemplary, and do not really want to limit the scope of the invention.In addition, in the following description, omitted the description to known features and technology, to avoid unnecessarily obscuring concept of the present invention.
Fig. 2 is the comprehensive utilization of energy system construction drawing based on supercritical air of the present invention.In a preferred embodiment of the present invention, the comprehensive utilization of energy system based on supercritical air of the present invention comprises: air liquefaction subtense angle S1, air separation subtense angle S2, gas expansion power generation subtense angle S3.Wherein, air liquefaction subtense angle S1 can comprise air compressor unit 2, cold-storage heat exchanger 3 and liquid container 5.Air separation subtense angle S2 can comprise oxygen-nitrogen separator 9, heat exchanger 10.Gas expansion power generation subtense angle S3 can comprise by propeller shaft couplings by at least one low-pressure expansion machine 13, at least one expansion unit and the generator 14 that high pressure expansion machine 12 constitutes.In the comprehensive utilization of energy system based on supercritical air of the present invention, any at least one pipeline (as pipeline 30,29,28,20,21) that is provided with between the two among air liquefaction subtense angle S1, the gentle volumetric expansion power generation sub-system of the air separation subtense angle S2 S3.Be provided with the pipeline 30 of band valve 15 between air compressor unit 2 and the low-pressure expansion machine 13, this pipeline 30 is used for by air compressor unit 2 to low-pressure expansion machine 13 input pressurized air.Be provided with pipeline 29 between gas expansion power generation subtense angle S3 and the cold-storage heat-exchanger 3, this pipeline is used for by gas expansion power generation subtense angle S3 to cold-storage heat-exchanger 3 transporting low temperature gases.Can be provided with throttle valve (as 4), pressure regulator valve (as 11) or stop valve (as 6,17,15) on the pipeline.As the general condition of realizing the comprehensive utilization of energy system based on supercritical air of the present invention, certainly also comprise the oxygen therapy pipe valve 8 that the liquid oxygen after will separating among cold-storage gas outlet pipe road 30 among the air liquefaction subtense angle S1 and valve 16, the air separation subtense angle S2 is exported, but these are not emphasis of the present invention, therefore they are not described in detail.
Be provided with the pipeline 23 of inlet opening that is connected to the high pressure expansion machine 12 of gas expansion power generation subtense angle S3 from the low temperature nitrogen delivery outlet of air separation subtense angle S2 between air separation subtense angle S2 and the gas expansion power generation subtense angle S3, be used for carrying high pressure low temperature nitrogen by air separation subtense angle S2 to gas expansion power generation subtense angle S3.On pipeline, can be provided with pressure regulator valve 11.At this moment, what flow through in the pipeline 23 is the higher nitrogen of purity, so the gas attack effect that pipeline 23 is subjected to the gas passageway of high pressure expansion machine 12 is very little, and therefore lifetime of system also can prolong greatly.Although the various import and export of clearly not drawing the air separation subtense angle among the figure, those skilled in the art readily appreciates that, can as required nitrogen delivery outlet, oxygen delivery outlet and air-out be set, and connects corresponding the import and export.
Air separation subtense angle S2 also and between the generator 14 of gas expansion power generation subtense angle S3 can be provided with pipeline 28, and this pipeline is used for by air separation subtense angle S2 to generator 14 transporting low temperature gases.Also modulating valve can be set on this pipeline.Here Shu Ru gas can be unsegregated air, also can be the nitrogen after separating, if nitrogen, can prolong the life-span of the pipeline of flowing through equally.
Liquid container 5 is provided with pipeline between cold-storage heat-exchanger 3, this pipeline is used for by liquid container 5 to cold-storage heat-exchanger 3 transporting low temperature gases.As shown in Figure 2, this moment, pipeline can be regulated by modulating valve 17, was used for the air of liquid container 5 part gaseous states is flowed to cold-storage heat-exchanger 3.When working, gas expansion power generation subtense angle S3 can close the path of this pipeline by regulating low temperature valve 17.Be noted that cold-storage heat-exchanger 3 is the most basic structures to being provided with pipeline 19 between the liquid container 5, pipeline 19 is to be transported to liquid container 5 for the liquid air with cold-storage heat-exchanger 3, can be provided with throttle valve 4 in the path.
Be provided with the pipeline 28 of cooler that is connected to the generator 14 of gas expansion power generation subtense angle S3 from the low temperature nitrogen delivery outlet of air separation subtense angle S2 between the generator 14 of air separation subtense angle S2 and gas expansion power generation subtense angle S3, be used for from air separation subtense angle S2 to generator 14 transporting low temperature nitrogen, generator is cooled off.What carry here is the higher nitrogen of purity, and it is aging to reduce pipeline.
Air liquefaction subtense angle S1 can also comprise air purification and purifier apparatus, and is not shown, and compressor bank 2 can adopt coaxial series connection or split axle parallel connection to connect with driving source, and a compressor only schematically draws among the figure.Can comprise many low pressure compressors and high pressure compressor in the compressor bank, unit is connected mutually or is integrated into whole multistage unit.
The expansion unit can comprise many low-pressure expansion machines and high pressure expansion machine, can adopt the parallel connection of coaxial series connection or split axle to connect with generator shaft.They are connected mutually or are integrated into whole multiple expansion engine.
Compressor in the compressor bank 2 can be piston type, axial flow, radial inflow, screw type or hybrid.Each low pressure compressor entrance connects the air source.
Cold-storage heat-exchanger 3 can be one or more combination of tubular type, board-like, tubular fin type and plate-fin heat exchanger.
All can be provided with valve on each connecting tube, valve location can arrange as required.
Also be provided with at least one cryopump 7 on the pipeline between liquid container 5 and the air separation subtense angle S2.
Cryopump 7 is reciprocating type, centrifugal or hybrid cryopump.
Low-pressure expansion machine 13 is discharged cryogenic gas, is connected with cold-storage heat-exchanger 3 through pipeline 29.Be noted that especially, in the comprehensive utilization of energy system based on supercritical air of the present invention, only be when high pressure expansion machine 12 is imported low temperature nitrogen, need not open valve 15, that is to say, it only is being only of when high pressure expansion machine 12 is not imported low temperature nitrogen, flowing through in the pipeline 29 air after the swollen machine 13 of low pressure expands, other times throttle down 15, open valve 11, making what flow through in pipeline 29 and the expansion unit is the higher nitrogen of purity, thereby reduce the corrosion of pipeline and expansion unit and wear out the prolongation lifetime of system.
Motor 1 is by the propeller shaft couplings of coupling and compressor bank 2; Generator 14 is by the propeller shaft couplings of coupling and expansion unit.
Compressor links to each other with low-pressure expansion machine through pipeline 30.After being used for compressor and opening machine, when the expansion unit can not provide low temperature nitrogen to cold-storage heat-exchanger 3, expand by low-pressure expansion machine 13, form Cryogenic air, the initial compression air is cooled.Although what flow through in pipeline 29 and the low-pressure expansion machine 13 this moment is air, the time is shorter, has therefore reduced corrosion and aging.The compressor high-pressure air connects cold-storage heat-exchanger 3 through main pipe 18.Heat exchanger 3 links to each other with liquid container 5 through pipeline 19 and throttle valve 4.
Be provided with valve 6 and at least one cryopump 7 in pipeline 21, valve is positioned at the upstream of cryopump.
Where necessary, open valve 17, by pipeline 20 the cryogenic gaseous air in the liquid container 5 is transported to cold-storage heat-exchanger 3 through cold air outlet.But throttle down 17 when cold-storage heat-exchanger 3 has enough low-temperature receivers.
Pipeline 28 connects cold air outlet or the gaseous nitrogen atmosphere outlet and the generator cooler that is integrated on the generator of air separator 9.The preferred gaseous nitrogen atmosphere outlet and the generator cooler that is integrated on the generator that connects air separator 9 can reduce the corrosion of generator cooler like this with aging.
The oxygen that air separator 9 is separated is sent through pipeline 22; Nitrogen is connected with high pressure, low-pressure expansion machine through pipeline 23,24 behind heat exchange tank 10.
Fig. 3 is the flow chart based on the comprehensive utilization of energy method of supercritical air of the embodiment of the invention.In conjunction with consulting Fig. 2 and Fig. 3, this method comprises the steps:
310, the air of air liquefaction subtense angle S1 liquefies;
320, air separation subtense angle S2 separates to obtain nitrogen and oxygen to the air after liquefying, and this nitrogen is flowed to gas expansion power generation subtense angle S3 by pipeline, and described oxygen is stored and/or output to external equipment;
330, the gas expansion power generation subtense angle S3 nitrogen that utilizes this air separation subtense angle S2 to provide generates electricity.
As one embodiment of the present of invention, utilize described air liquefaction subtense angle that air is liquefied and can comprise in the step 310:
By second pipeline 29 that arranges between this low-pressure expansion machine 13 and this cold-storage heat-exchanger 3, carry this cryogenic gas by low-pressure expansion machine 13 to described cold-storage heat-exchanger 3;
Utilize this cold-storage heat-exchanger 3 based on this cryogenic gas the pressurized air of exporting from second delivery outlet of air compressor unit 2 to be liquefied.
As one embodiment of the present of invention, in the step 320, utilize described air separation subtense angle that the air after liquefying is separated to obtain nitrogen and oxygen, described nitrogen is flowed to described gas expansion power generation subtense angle by pipeline, can comprise:
By being arranged on the pipeline 23 of inlet opening that is connected to the high pressure expansion machine 12 of gas expansion power generation subtense angle S3 from the low temperature nitrogen delivery outlet of air separation subtense angle S2, carry high pressure low temperature nitrogen by this air separation subtense angle S2 to this gas expansion power generation subtense angle S3.
As one embodiment of the present of invention, method shown in Figure 3 can also comprise step: by liquid container 5 to the pipeline 20 that arranges between the cold-storage heat-exchanger 3, by this liquid container 5 to these cold-storage heat-exchanger 3 transporting low temperature gases.
As one embodiment of the present of invention, method shown in Figure 3 can also comprise step: by the pipeline 33 that arranges between the cold-storage heat-exchanger 3 of air separation subtense angle S2 and air liquefaction subtense angle S1, by this air separation subtense angle S2 to cold-storage heat-exchanger 3 transporting low temperature gases.
More specifically at length, system of the present invention running is:
When system started, compressor bank was compressed into supercritical state with air in certain amount.On the one hand, when valve 11 is closed, when no low temperature nitrogen is supplied with the expansion unit, part pressurized air becomes Cryogenic air after pipeline 30 is delivered to low-pressure expansion machine expansion acting, send into cold-storage heat-exchanger 3 (can be multistage cold-storage heat-exchanger) through pipeline 29, be used for the cooling of main pipe high-pressure air, open and work as valve 11, when having low temperature nitrogen to supply with the expansion unit, then throttle down 15; On the other hand, the high-pressure air in the compressor bank main pipe, through cold-storage heat-exchanger 3 back coolings, most low temperature pressurized air are liquefied behind throttle valve, and send into low temperature liquid container 5 and store as cold energy.A small amount of remaining gaseous state Cryogenic air turns back to cold-storage heat-exchanger 3 through pipeline 20, and being used for provides the part low-temperature receiver to cold-storage heat-exchanger 3.
System after having put aside a certain amount of liquid air in the liquid container 5, opens valve 6 after starting, cryopump 7 liquid towards air pressurized, the high-pressure liquid air is heated up through oxygen-nitrogen separator 9, reach the supercritical state of nitrogen after, make the nitrogen ebullition, gasification, with the nitrogen separation of from liquid air, gasifying.Remaining liquid is the liquid oxygen of certain purity, opens valve 8 and is transported to oxygen conveying pipe through pipeline 22.(the heat here can be can produce a large amount of used heat, waste heat from heat, blast furnace high-temperature gas heat exchanger, metallurgy, thermoelectricity, manufacture of cement that the sun absorbs to nitrogen after the gasification through the follow-up temperature of continuing rising of heat exchange tank 10 (or appellation heat exchanger) heat absorption, if hot water tank heat exchange deficiency, also can behind hot water tank, set up electric regenerative heat exchange chamber), further improve the required temperature of nitrogen expansion acting.High pressure nitrogen drives high pressure expansion machine 12, low-pressure expansion machine 13 actings through pipeline 23,24, drives generator for electricity generation.If valve 15 is opened, then can be after system start a period of time, the valve 15 in the pipeline 30 is closed, the low-pressure expansion machine relief opening is discharged pure low temperature nitrogen, be used for the cooling of main pipe air, and discharge through valve 16 from cold-storage heat-exchanger 3 outlet conduits 31, enter nitrogen gas delivery-line.This shows that the main pipeline 23 of system, 24,29,28 most times are to flow through the higher nitrogen of purity, but not oxygenous air can reduce the corrosion to system pipeline and expansion unit like this, and lifetime of system is prolonged.
Comprehensive utilization of energy system and method based on supercritical air of the present invention, can making motor, many to abandon wind-powered electricity generation with power station valley electricity and wind-powered electricity generation can be power supply, drives the pneumatics unit, with air liquefaction as the cold energy raw material storage.The energy that generates electricity is used for the power supply of smelting equipment and air compressor itself more, also can be with unnecessary electric energy feed-in electrical network.
Although do not draw in the drawings, in the comprehensive utilization of energy system based on supercritical air of the present invention, also comprise purification and the purifying of air in the air compression process, remove airborne solid matter, moisture and foreign gas; Air purification and purifier apparatus are integrated in the compressed air unit.
In the comprehensive utilization of energy system based on supercritical air of the present invention, compressor bank 2 overall pressure tatios are between 38～340.When being multiple compressors, can adopt coaxial series connection, split axle pattern in parallel to connect with driving source.
In the comprehensive utilization of energy system based on supercritical air of the present invention, expansion unit overall pressure tatio is between 38～340.When being many decompressors, can adopt coaxial series connection, split axle pattern in parallel to connect with generator shaft.
In the comprehensive utilization of energy system based on supercritical air of the present invention, compressor is piston type, axial flow, radial inflow, screw type or hybrid.
In the comprehensive utilization of energy system based on supercritical air of the present invention, decompressor is piston type, axial flow, centrifugal, screw type or hybrid.
In the comprehensive utilization of energy system based on supercritical air of the present invention, the heat exchanger of cold-storage heat-exchanger 3, supercritical air is cooled to 81K～150K (K is Kelvin temperature unit), and its heat exchanger is a kind of of tubular type, board-like, tubular fin type (as shown in FIG.) and plate-fin heat exchanger or combination.
In cold-storage heat-exchanger, the direct contact heat-exchanging of Cryogenic air and cool storage medium or non-direct contact heat-exchanging, its heat exchange form is a kind of or combination in sensible heat cold-storage or the solid-liquid phase change cold-storage.Heat exchanger cools off the high pressure supercritical air of main pipe.
The sensible heat cool storage medium that adopts has one or more in sealing ice hockey, stone or concrete, aluminium strip dish or other metals; The solid-liquid phase change cool storage medium is that phase transition temperature is at ammonia and the aqueous solution, salts solution, olefines, alkanes substance and the compound thereof of 81K～150K, one or more in alcohols and the aqueous solution thereof.Cool storage medium is stored in the thermally insulated container.
When cold-storage heat-exchanger provides the low temperature cold not enough, install the low-temperature expansion turbine engine additional or open valve 17, provide cold to replenish.
In the comprehensive utilization of energy system based on supercritical air of the present invention, liquid air low temperature liquid container 5 is low temperature storage tank or Dewar storage tank, and liquid air stores for atmospheric pressure or under pressure power.
In the comprehensive utilization of energy system based on supercritical air of the present invention, cryopump 7 is reciprocating type, centrifugal or hybrid, and liquid air is pressurized to 3.8MPa～34Mpa, in the time of many, is plural serial stage or parallel connection.
In the comprehensive utilization of energy system based on supercritical air of the present invention, 9 fens high pressure of oxygen-nitrogen separator, middle pressure, low pressure three classes, be to utilize the boiling point of oxygen and nitrogen different, realize the separation of nitrogen, and will still be in liquid oxygen by pipeline 22, valve 8 outputs.
In the comprehensive utilization of energy system based on supercritical air of the present invention, heat exchange tank (being also referred to as heat exchanger) 10, waste heat, the used heat of the circulating water that apparatus cools such as utilization metallurgy, thermoelectricity, cement furnace are used make high pressure nitrogen further be warmed up to more than the 300K by heat exchanger.Heat exchanger 10 is a kind of of tubular type, board-like, tubular fin type and plate-fin heat exchanger or combination.
In the comprehensive utilization of energy system based on supercritical air of the present invention, waste heat, used heat can be waste heat and the used heat of power plant, cement industry, metallurgy industry, and waste heat and the used heat of native system machine operation generation.
In the comprehensive utilization of energy system based on supercritical air of the present invention, when energy storage, regulate energy storage capacity by the air inflow of control first order compressor.
In the comprehensive utilization of energy system based on supercritical air of the present invention, regulating air inflow is by regulating compressor load, start/stop time, start-stop part compressor or regulating the control that pressure ratio realizes air inflow.
In the comprehensive utilization of energy system based on supercritical air of the present invention, when utilizing the nitrogen energy storing and electricity generating, regulate generating capacity by the liquid air air inflow of control air separation subtense angle S2.
Obviously, those skilled in the art will readily appreciate that, can be in system on all duct routes, all kinds of valves are installed in any position of valve that needs, and perhaps adjust the relative position of valve and miscellaneous part as required.In the accompanying drawings, do not mark the pipeline place of valve, valve can be set as required yet.
Native system carries out high-efficiency comprehensive utilization to the energy, and following advantage is arranged: comprehensive utilization of energy rate height; Save energy and reduce the cost, reduce production costs, improve economic benefit of enterprises; Environmentally friendly; Lifetime of system is long.Be applicable to metallurgy, thermoelectricity and the cement production enterprise of various scales, reduce the consumption of business capital inputs and resources, have wide use prospect.
The comprehensive utilization of resource and the energy: the present invention utilizes paddy electricity and wind-powered electricity generation to abandon the wind-powered electricity generation energy, carries out the overcritical energy storage of liquid air and oxygen, nitrogen preparation; Utilize the cold of low temperature nitrogen
Realize the cooling of circulating water, reduce circulating water temperature; High Temperature High Pressure nitrogen generating after recycling is heated.The liquid oxygen that generates is admitted to the oxygen therapy pipeline, is used for purposes such as blast furnace steel-making; The nitrogen of Pai Chuing is utilized by tinning at last.System very effectively utilizes resource and the energy, almost not waste.
Energy-saving and cost-reducing, reduce production costs, improve economic benefit of enterprises: metallurgy, thermoelectricity, manufacture of cement can produce a large amount of used heat, waste heat, if do not fully utilized, can cause a large amount of energy wastes.The present invention has not only realized the recovery of used heat, waste heat, and has realized the resources effective utilization, will reduce enterprise's cost of production effectively, is example to produce 1640000 tons cement production enterprise per year, can be the economic benefit that enterprise brings 1,500 ten thousand yuan at least.
Environmentally friendly: this comprehensive utilization of energy system does not relate to fossil fuel, does not discharge any harmful matter, is complete environmental protection.
Belong to the energy-saving and cost-reducing system that a kind of novel high efficient energy sources fully utilize, can use with coordinative composition of equipments such as metallurgy, thermoelectricity, cement furnaces.
What reflux in the pipeline when releasing energy with system is that the legacy system of air is compared always, legacy system has mobile oxygen and causes the defective that system pipeline is aging soon, the life-span lacks, can occur that system cost is also unrecovered to be come but system's problem of ageing failure, and not only need cold-storage heat-exchanger also to need regenerative heat exchanger in these systems, cause system complex, build the high problem of cost.Therefore, the invention provides a kind of system, can solve energy storage, the system that can effectively release energy again, and can make system have the relatively long life-span so that guarantee can not only cost-recovering, can also bring great economic benefit.
Should be understood that above-mentioned embodiment of the present invention only is used for exemplary illustration or explains principle of the present invention, and is not construed as limiting the invention.Therefore, any modification of under situation without departing from the spirit and scope of the present invention, making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.In addition, claims of the present invention are intended to contain whole variations and the modification in the equivalents that falls into claims scope and border or this scope and border.
Claims (13)
1. comprehensive utilization of energy method based on supercritical air, described method is applicable to a kind of comprehensive utilization of energy system based on supercritical air, described system comprises: air liquefaction subtense angle, air separation subtense angle, gas expansion power generation subtense angle; It is characterized in that described method comprises the steps:
Described air liquefaction subtense angle liquefies to air;
Described air separation subtense angle separates to obtain nitrogen and oxygen to the air after liquefying, and described nitrogen is flowed to described gas expansion power generation subtense angle by pipeline, and described oxygen is stored and/or output to external equipment;
The nitrogen that described gas expansion power generation subtense angle utilizes described air separation subtense angle to provide generates electricity.
2. the method for claim 1 is characterized in that, described air liquefaction subtense angle comprises air compressor unit, cold-storage heat-exchanger and liquid container; Described air separation subtense angle comprises oxygen-nitrogen separator, heat exchanger; Described gas expansion power generation subtense angle comprise by propeller shaft couplings by at least one low-pressure expansion machine, at least one expansion unit and the generator that high pressure expansion machine constitutes; Any at least one pipeline that is provided with between the two in described air liquefaction subtense angle, described air separation subtense angle, the described gas expansion power generation subtense angle; Be provided with the pipeline of band valve between described air compressor unit and the described low-pressure expansion machine, this pipeline is used for by described air compressor unit to described low-pressure expansion machine input pressurized air; Be provided with pipeline between described gas expansion power generation subtense angle and the described cold-storage heat-exchanger, this pipeline is used for by described gas expansion power generation subtense angle to described cold-storage heat-exchanger transporting low temperature gas.
3. method as claimed in claim 2 is characterized in that, describedly utilizes described air liquefaction subtense angle that air is liquefied to comprise:
First pipeline that has valve that arranges between first delivery outlet by air compressor unit and the described low-pressure expansion machine, the low-pressure expansion machine of part pressurized air being imported described gas expansion power generation subtense angle expands, and produces cryogenic gas;
By second pipeline that arranges between described low-pressure expansion machine and the described cold-storage heat-exchanger, carry described cryogenic gas by described low-pressure expansion machine to described cold-storage heat-exchanger;
Utilize described cold-storage heat-exchanger based on described cryogenic gas the pressurized air of exporting from second delivery outlet of described air compressor unit to be liquefied.
4. method as claimed in claim 2 is characterized in that, described utilize described air separation subtense angle to liquefaction after air separate to obtain nitrogen and oxygen, described nitrogen is flowed to described gas expansion power generation subtense angle by pipeline, comprising:
By being arranged on the pipeline of inlet opening that is connected to the high pressure expansion machine of described gas expansion power generation subtense angle from the low temperature nitrogen delivery outlet of described air separation subtense angle, carry high pressure low temperature nitrogen by described air separation subtense angle to described gas expansion power generation subtense angle.
5. method as claimed in claim 3 is characterized in that, described method also comprises:
By described liquid container to the pipeline that arranges between the described cold-storage heat-exchanger, by described liquid container to described cold-storage heat-exchanger transporting low temperature gas.
6. method as claimed in claim 3 is characterized in that, described method also comprises:
The pipeline that arranges between the cold-storage heat-exchanger by described air separation subtense angle and described air liquefaction subtense angle, by described air separation subtense angle to described cold-storage heat-exchanger transporting low temperature gas.
7. as each described method among the claim 1-6, it is characterized in that described air liquefaction subtense angle also comprises air purification and purifier apparatus, described compressor bank adopts coaxial series connection or split axle parallel connection to connect with driving source.
8. method as claimed in claim 7 is characterized in that, described expansion unit adopts coaxial series connection or split axle parallel connection to connect with generator shaft.
9. as the described method of claim to 2, it is characterized in that:
Compressor in the described air compressor unit is piston type, axial flow, radial inflow, screw type or hybrid;
Described decompressor is piston type, axial flow, radial inflow, screw type or hybrid.
10. as the described method of claim to 2, it is characterized in that:
Described cold-storage heat-exchanger is one or more combination of tubular type, board-like, tubular fin type and plate-fin heat exchanger.
11. as the described method of claim to 2, it is characterized in that:
Be provided with valve on each connecting tube;
Also be provided with at least one cryopump on the pipeline between described liquid container and the described air separation subtense angle.
12. as the described method of claim to 11, it is characterized in that:
Described cryopump is reciprocating type, centrifugal or hybrid cryopump.
13. as the described method of claim to 2, it is characterized in that:
Heat exchanger in the described air separation subtense angle is a kind of of tubular type, board-like, tubular fin type and plate-fin heat exchanger or combination.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351020A (en) * | 2015-11-16 | 2016-02-24 | 南京师范大学 | System and method for reducing energy consumption of oxygen-enriched combustion power station based on nitrogen resource utilization |
| CN106050344A (en) * | 2016-06-14 | 2016-10-26 | 全球能源互联网研究院 | Cryogenic liquidized air energy storage system through low-temperature gaseous cool storage working media |
| CN108266229A (en) * | 2018-01-12 | 2018-07-10 | 泉州装备制造研究所 | A kind of adiabatic constant pressure compressed-air energy-storage system based on volatile fluid |
| CN112254361A (en) * | 2020-10-19 | 2021-01-22 | 中国科学院理化技术研究所 | Liquid air energy storage system adopting electric drive for air inlet precooling |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2489411A1 (en) * | 1980-08-29 | 1982-03-05 | Technigaz | Off peak energy storing system - has air liquefying and vaporising units to enable energy to be stored as liquid air in low volume |
| DE3139567A1 (en) * | 1981-10-05 | 1983-04-21 | Bautz, Wilhelm, 6000 Frankfurt | Process for storing electrical energy, using liquefied gases, in particular liquid air |
| CN1043196A (en) * | 1988-12-01 | 1990-06-20 | 林德股份公司 | Air separating method and device |
| CN101427007A (en) * | 2006-02-27 | 2009-05-06 | 高维有限公司 | A method of storing energy and a cryogenic energy storage system |
| CN101975335A (en) * | 2010-09-26 | 2011-02-16 | 上海交通大学 | Reliquefaction device for boil-off gas from liquefied natural gas vehicle gas filling station |
| CN102817655A (en) * | 2012-09-06 | 2012-12-12 | 南京玖壹环境科技有限公司 | Comprehensive energy source management system for peak shifting power supplying and method thereof |
-
2013
- 2013-05-22 CN CN201310197113.0A patent/CN103256081B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2489411A1 (en) * | 1980-08-29 | 1982-03-05 | Technigaz | Off peak energy storing system - has air liquefying and vaporising units to enable energy to be stored as liquid air in low volume |
| DE3139567A1 (en) * | 1981-10-05 | 1983-04-21 | Bautz, Wilhelm, 6000 Frankfurt | Process for storing electrical energy, using liquefied gases, in particular liquid air |
| CN1043196A (en) * | 1988-12-01 | 1990-06-20 | 林德股份公司 | Air separating method and device |
| CN101427007A (en) * | 2006-02-27 | 2009-05-06 | 高维有限公司 | A method of storing energy and a cryogenic energy storage system |
| CN101975335A (en) * | 2010-09-26 | 2011-02-16 | 上海交通大学 | Reliquefaction device for boil-off gas from liquefied natural gas vehicle gas filling station |
| CN102817655A (en) * | 2012-09-06 | 2012-12-12 | 南京玖壹环境科技有限公司 | Comprehensive energy source management system for peak shifting power supplying and method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351020A (en) * | 2015-11-16 | 2016-02-24 | 南京师范大学 | System and method for reducing energy consumption of oxygen-enriched combustion power station based on nitrogen resource utilization |
| CN106050344A (en) * | 2016-06-14 | 2016-10-26 | 全球能源互联网研究院 | Cryogenic liquidized air energy storage system through low-temperature gaseous cool storage working media |
| CN106050344B (en) * | 2016-06-14 | 2018-07-06 | 全球能源互联网研究院有限公司 | A kind of cold liquid air energy storage method of mixed working fluid moldeed depth and system |
| CN108266229A (en) * | 2018-01-12 | 2018-07-10 | 泉州装备制造研究所 | A kind of adiabatic constant pressure compressed-air energy-storage system based on volatile fluid |
| CN108266229B (en) * | 2018-01-12 | 2020-07-10 | 泉州装备制造研究所 | Adiabatic constant voltage compressed air energy storage system based on volatile fluid |
| CN112254361A (en) * | 2020-10-19 | 2021-01-22 | 中国科学院理化技术研究所 | Liquid air energy storage system adopting electric drive for air inlet precooling |
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|---|---|
| CN103256081B (en) | 2015-04-22 |
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Effective date of registration: 20160311 Address after: 211113 Tao Dong Road, Nanjing Airport Industrial Zone, Jiangning, Jiangsu Patentee after: Nanjing High Accurate Drive Electromechanical Automation Equipment Co., Ltd. Address before: 211100, No. 1 East Tianyuan Road, Jiangning District, Jiangsu, Nanjing Patentee before: Nanjing Juneng Electric Control Automation Equipment Manufacturing Co., Ltd. |
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