CN105605419A - Cold energy comprehensive recycling system of air and nitrogen station and recycling method thereof - Google Patents
Cold energy comprehensive recycling system of air and nitrogen station and recycling method thereof Download PDFInfo
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- CN105605419A CN105605419A CN201511028602.9A CN201511028602A CN105605419A CN 105605419 A CN105605419 A CN 105605419A CN 201511028602 A CN201511028602 A CN 201511028602A CN 105605419 A CN105605419 A CN 105605419A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
- F17C7/02—Discharging liquefied gases
- F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/65—Employing advanced heat integration, e.g. Pinch technology
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
- F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/032—Orientation with substantially vertical main axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/056—Small (<1 m3)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/014—Nitrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/013—Single phase liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
- F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
- F17C2225/0107—Single phase
- F17C2225/013—Single phase liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
- F17C2227/03—Heat exchange with the fluid
- F17C2227/0367—Localisation of heat exchange
- F17C2227/0388—Localisation of heat exchange separate
- F17C2227/0395—Localisation of heat exchange separate using a submerged heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2270/00—Applications
- F17C2270/05—Applications for industrial use
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A cold energy comprehensive recycling system of an air and nitrogen station comprises a liquid nitrogen storage tank, a nitrogen storage tank, an instrument air buffering tank, a cooling box, a main filtering separator, an auxiliary filtering separator, an air compressor and a precise filter. According to the cold energy comprehensive recycling system of the air and nitrogen station, cold energy released when liquid nitrogen is gasified can be utilized in the factory air manufacturing process, produced factory air can meet the requirements of water dew points and oil dew points, the using requirement can be guaranteed, meanwhile, the energy utilizing rate is increased, the system composition is simple, equipment cost is saved, and production cost of enterprises is reduced.
Description
Technical field
The present invention relates to petrochemical field, specifically, is a kind of for cold recovery comprehensive utilization in the empty nitrogen station of petrochemical equipmentApparatus and method.
Background technology
The factory of oil, chemical field all needs to arrange sky nitrogen station, for factory's wind and nitrogen being provided to process unit district.
Liquid nitrogen is the abbreviation of liquefaction nitrogen, and it is to utilize nitrogen after operating pressure liquefies under for about 0.8MPa and low temperature, volumeThis character of 1/600 left and right can narrow down to gaseous state time, for nitrogen transport provides a kind of efficient approach, has also strengthened simultaneouslyThe scope of application of nitrogen. After liquid nitrogen gasification, there are the advantages such as purity is high, pollution-free, water dew point is low, especially the liquid nitrogen after gasificationWater dew point can reach below-170 DEG C, is highly suitable for thawing and the purging of the exigent process pipe of dew point of cryogen frozen blockAnd displacement, and use in severe cold area as process gas.
The domestic common way by liquid nitrogen gasification is at present, and the liquid nitrogen being stored in liquid nitrogen storage tank is passed through from supercharging gasifier tankAfter interior medium supercharging, utilize pressure energy that liquid nitrogen in tank is pressed into air temperature type liquid nitrogen converter. The air temperature type liquid nitrogen converter runner of flowing throughLiquid nitrogen can from air, absorb heat, and become gas from liquid rotating thus. After air temperature type liquid nitrogen converter, gasification nitrogenThe temperature of gas can be than the low 10 DEG C of left and right of environment temperature, and in especially northerly winter, the temperature of nitrogen can be very low. This usuallyTechnological requirement can not be met, the cost of downstream line and equipment can be increased again simultaneously. This just need to increase by one on this nitrogen pipelinePlatform heater, rises to suitable operating temperature by nitrogen.
Factory's wind is mainly as the power source of instrument executing agency, and the purging of analytical instrument, anti-explosion electric system meter is closeThe bailout gas of envelope gas, factory air generation systems etc. Conventionally the way of the production of factory's wind is that outside air is through air compressingAfter machine inlet filter elimination dust, enter compressor by intake valve, mix with the lubricating oil spraying into, and enter discharge chambe compression.Compressed air after compression through air cooler or water cooler cooling after, enter gas-liquid separator and carry out gas-liquid separation. After separation, obtainCompressed air, still contains certain moisture and oil content, and its water dew point and oily dew point can not reach the matter of the factory air of national regulationAmount requirement, must arrange drying device. In compressed air drying is processed, the general absorption methods that adopt more. Make for cold districtWith compressed air, need to be imported combination drying machine, combination drying machine is made up of cooling driers and solid absorption drier, thenEnter accurate filter, the dew point of guarantee factory air reaches the requirement of national technical specification to factory air quality like this.
In liquid nitrogen gasification technological process, liquid nitrogen was still ultralow temperature fluid (approximately-175 DEG C) before entering air temperature type liquid nitrogen converter,The quality of this cold is very high, directly enters air temperature type liquid nitrogen converter re-heat (thermal source is air) gasification and causes energy waste.Meanwhile, for continuing to promote nitrogen temperature, make it reach rational serviceability temperature, still need electric heater be set in downstream or steam addsThe heaters such as hot device, this also can cause these high-quality thermals source to be wasted greatly.
Summary of the invention
The present invention is directed to current empty nitrogen station and not only waste cold energy, also need additional configuration heater to consume more multiple-energy-source and heat up,Cause the great problem of energy waste, designed a kind of empty nitrogen station cold energy comprehensive reutilization system and recoverying and utilizing method thereof.
Empty nitrogen of the present invention station cold energy comprehensive reutilization system, comprises liquid nitrogen storage tank, nitrogen storage tank, instrument wind surge tank, coldCase, main filter separator, secondary filter separator, air compressor, accurate filter.
Described ice chest is provided with cold fluid runner and hot fluid runner.
Described air compressor is compound compressor, and the progression of described compound compressor is N, and described hot fluid runner is provided with NIndividual.
Described N is more than or equal to 2 integer.
Described cold fluid runner is connected with nitrogen storage tank with liquid nitrogen storage tank respectively.
The N-1 level outlet of described air compressor is by N-1 level compressed air discharge duct and N-1 level hot fluid runner phaseConnect, described N-1 level hot fluid runner is the N level entrance phase with described air compressor by N level compressed air inlet pipe roadConnect.
The N level outlet of described air compressor is by N level compressed air discharge duct and ice chest N level hot fluid runner phaseConnect, described N level hot fluid runner is connected with main filter separator by shallow cold compression air duct.
Preferably, compressed air inlet pipe road is provided with secondary filter separator.
Preferably, described main filter separator connects accurate filter by purification of compressed air pipeline.
Preferably, on described purification of compressed air pipeline, air-heating type gasifier is installed.
Preferably, accurate filter is connected with factory's wind surge tank.
Preferably, on described purification of compressed air pipeline, active carbon adsorber is installed.
Preferably, described ice chest is in parallel or be in series with air-heating type gasifier.
Preferably, on described compressed air discharge duct, compressed air surge tank is installed.
Preferably, in described compressed air surge tank, be connected with methyl alcohol storage tank by filling pipeline, described filling pipeline is provided withDispenser pump.
Preferably, after described ice chest and air-heating type gasifier, contact or be parallel with electric heater.
Preferably, further comprise heat exchanger, low-grade fever drying tower and refrigeration compressor, described heat exchanger comprise forecooler,Evaporimeter, remaining cold heat exchanger, radiator.
Described N level compressed air discharge duct, the hot fluid runner of forecooler, the hot fluid runner of evaporimeter, low-grade fever drying towerBe connected successively.
After the cold fluid runner of described forecooler and the series connection of the cold fluid runner of remaining cold heat exchanger, in parallel with purification of compressed air pipeline;
Described evaporimeter, refrigeration compressor, remaining cold heat exchanger are contacted successively by refrigerant line.
Between the hot fluid runner that described evaporimeter and low-grade fever drying tower are connected, branch road filter separator is installed.
Preferably, between the hot fluid runner that described forecooler and evaporimeter are connected, branch road filter separator is installed.
Preferably, described forecooler and remaining cold heat exchanger are in parallel or be connected with radiator.
A kind of empty nitrogen station cold energy comprehensive reutilization method, step is as follows:
1) liquid nitrogen in liquid nitrogen storage tank is passed in the cold fluid runner of ice chest and carries out heat exchange, by liquid nitrogen gasification, and sendEnter in nitrogen storage tank;
2) air, through 1 grading row air compressing of air compressor, is then sent into by 1 grade of compressed air discharge duct1 grade of hot fluid runner to ice chest carries out heat exchange, sends into the grading stepping line space air pressure of air compressor the 2nd after heat exchangeContracting, then carries out heat exchange by 2 grades of hot fluid runners that 2 grades of compressed air discharge ducts are sent to ice chest;
3) air compressor is according to step 2) mode carry out step by step successively air compressing, until compressed air reaches settingRequirement, is then sent to main filter separator, mistake by N level zone of heat liberation and the purification of compressed air pipeline of ice chestFilter condensed water and oil in compressed air, make compressed-air actuated water dew point and oily dew point reach setting requirement;
4) main filter separator is sent to accurate filter by compressed air by purification of compressed air pipeline, further removesWater in compressed air and greasy dirt, make compressed-air actuated water dew point and oily dew point reach setting requirement, then compressed air sentEnter factory's air pipe line, carry out factory's wind supply.
Preferably, the liquid nitrogen in described liquid nitrogen storage tank enters air-heating type gasifier, or electric heater and air-heating type gasifier,Intensification is gasificated into nitrogen, then enters into nitrogen storage tank.
Preferably, except the final stage hot fluid runner of ice chest, compressed air carries out heat by the hot fluid runners at different levels of ice chestAfter exchange, need by filter separator, isolate the water in compressed air, then enter air compressor next stage and carry out furtherAir compressing;
Preferably, in described compressed air surge tank, be connected with methyl alcohol storage tank by filling pipeline, described filling pipeline is provided withDispenser pump.
Preferably, described main filter separator is first sent into air-heating type gasifier by compressed air by shallow cold compression air duct and is enteredRow heats up, and sends into the airborne impurity of active carbon adsorber adsorption compression, then enters accurate filter.
Preferably, the hot fluid runner that the compressed air in described N level compressed air discharge duct can enter into forecooler entersRow heat exchange, the hot fluid runner then entering in evaporimeter carries out heat exchange again, then will compress empty by low-grade fever drying towerThe online water dew point of gas is down to setting requirement, finally sends into purification of compressed air pipeline.
Preferably, the cold fluid runner that the shallow cold compression air of the main filter separator of described outflow can enter forecooler carries out heat and hands overChange, the cold fluid runner that then enters remaining cold heat exchanger carries out heat exchange, finally sends purification of compressed air pipeline back to.
Preferably, described refrigeration compressor is by after refrigerant compression, and the hot fluid runner of sending into remaining cold heat exchanger carries out heat exchange,After expansion valve expenditure and pressure, the cold fluid runner that enters evaporimeter carries out heat exchange, finally gets back to refrigeration compressor and again carries outCompression.
Preferably, described compressed air leaves after the branch road hot fluid runner of forecooler, removes condensed water by filter separator;
Preferably, described compressed air leaves after the branch road hot fluid runner of evaporimeter, removes condensed water by filter separator;
Preferably, when compressed air enters and carries out heat exchange in the hot fluid runner of forecooler, can enter series connection with it orRadiator in parallel dispels the heat;
Preferably, when the hot fluid runner that cold-producing medium enters remaining cold heat exchanger carries out heat exchange, can enter series connection with it orRadiator in parallel dispels the heat.
The invention has the beneficial effects as follows: the cold energy use that empty nitrogen station cold energy comprehensive reutilization system discharges can be by liquid nitrogen gasification timeIn the process of manufacturing at factory's wind, factory's wind energy of producing enough reaches the requirement of water dew point and oily dew point, can ensure to use to wantAsk, also improved energy utilization rate simultaneously, system composition is simple, has saved equipment cost, has reduced enterprise's production cost.
Filter separator can be removed through the condensed water in the cooled compressed air of ice chest, has avoided condensed water to air compressorImpact, ensured service life and the even running of air compressor.
Compressed air surge tank and factory's wind surge tank cushion gas circuit, ensure the pressure stability of working media in whole pipeline.
Annotate the methyl alcohol is the icing situation preventing after pressure-air cooling, avoids, because of the freezing pipeline blockage that causes, having ensured system fortuneThe stability of row.
Air-heating type gasifier on purification of compressed air pipeline can be accelerated to improve compressed-air actuated temperature, makes factory's wind energy enough rapidReach process unit temperature required, saved equipment and piping cost simultaneously.
Air-heating type gasifier on liquid nitrogen gasification pipeline and electric heater can improve the scale of liquid nitrogen gasification, in nitrogen demandWhen large, ensure demand.
The heat energy producing can make full use of air compressing time, compressed air completes after the heat exchange with liquid nitrogen, makes nitrogen temperature, energyEnough minimizings are not even used the extra energy to heat, and have further improved the utilization rate of the energy, have reduced plant produced cost.
The temperature of compressed air and refrigeration machine cryogen can be effectively controlled in the use of radiator, convenient operation personnel to heat balanceRegulate.
The condensed water that filter separator produces can remove gas cooled time, ensures that free water does not enter subsequent processing.
Liquid nitrogen utilizes compressed-air actuated heat energy, is converted into the gasification nitrogen that meets process unit needs; Compressed air utilizes liquid nitrogenCold energy, is converted into the factory's wind that meets process unit needs, has ensured that the cold energy of compressed-air actuated heat energy and liquid nitrogen can both be hadEffect ground utilizes.
Brief description of the drawings
Accompanying drawing 1 is the structural representation one of this sky nitrogen station cold energy comprehensive reutilization system;
Accompanying drawing 2 is the structural representation two of this sky nitrogen station cold energy comprehensive reutilization system.
Detailed description of the invention
In order further to understand structure of the present invention, feature and other object, existing describe in detail in conjunction with appended preferred embodiment asUnder, illustrated preferred embodiment is only for technical scheme of the present invention is described, and non-limiting the present invention.
The specific embodiment of the present invention is as follows:
Embodiment mono-:
As shown in Figure 1, this sky nitrogen station cold energy comprehensive reutilization system comprise liquid nitrogen storage tank V-01, nitrogen storage tank V-02,Ice chest E-01, air compressor C-01, main filter separator F-02, secondary filter separator F-01, accurate filter F-03.
In ice chest E-01, be provided with cold fluid runner and hot fluid runner.
Air compressor is compound compressor, and progression is N, and hot fluid runner is provided with N, and N is more than or equal to 2 integer.
Cold fluid runner is connected with nitrogen storage tank V-02 with liquid nitrogen storage tank V-01 respectively.
The N-1 level outlet of air compressor C-01 is by N-1 level compressed air discharge duct and ice chest E-01 N-1 level hot-fluidBody runner is connected, and described ice chest E-01 N-1 level hot fluid runner is by N level compressed air inlet pipe road and described air pressureThe N level entrance of contracting machine C-01 is connected.
The N level outlet of air compressor C-01 is by N level compressed air discharge duct and ice chest E-01 N level flow of heated fluidRoad is connected, and described N level hot fluid runner is connected with main filter separator F-02 by shallow cold compression air duct.
Main filter separator F-02 connects accurate filter F-03 by purification of compressed air pipeline.
Taking N=2 as example, air compressor is two-stage compressor, and the hot fluid runner in ice chest E-01 is provided with two.
Liquid nitrogen in liquid nitrogen storage tank V-01 is passed in the cold fluid runner of ice chest E-01.
Meanwhile, atmosphere is compressed after the chopped-off head of air compressor C-01, and compressed-air actuated temperature is increased to 170 DEG C of left and right,Then be sent in the 1st grade of hot fluid runner of ice chest E-01 by 1 grade of compressed air discharge duct.
In ice chest E-01, in the liquid nitrogen in cold fluid runner and the 1st grade of hot fluid runner, the compressed air of high temperature carries out heat exchange.
Too low for temperature after avoiding heat exchange, the compressed air temperature after heat exchange in the 1st grade of hot fluid runner is reduced to 20 DEG C of left and right. Then send into air compressor C-01 secondary by 2 grades of compressed air inlet pipe roads and further carry out air compressing.
Further the compressed air of compression reaches setting pressure, and temperature is also increased to 160 DEG C of left and right again, and then compressed air is logicalCross the 2nd grade of hot fluid runner that 2 grades of compressed air discharge ducts enter ice chest E-01, carry out heat with the liquid nitrogen in cold fluid runnerExchange.
After heat exchange, the liquid nitrogen temperature in cold fluid runner raises, and is gasificated into nitrogen, be then sent in nitrogen storage tank V-02,Nitrogen storage tank V-02 sends into nitrogen process island again and uses.
After heat exchange, compressed-air actuated temperature is reduced to below-50 DEG C, is then sent to main filtration by shallow cold compression air ductIn separator F-02, main filter separator F-02 filters out condensed water and the oil droplet in compressed air, and compressed-air actuated water is revealedPoint and oily dew point reach setting requirement.
The shallow cold compression air of getting rid of condensed water leaves main filter separator F-02, sends into first by purification of compressed air pipelineAir-heating type gasifier AH-02, air-heating type gasifier makes shallow cold compression atmosphere temperature rising to approaching normal temperature.
The purification of compressed air of normal temperature enters in accurate filter F-03, and accurate filter F-03 removes tiny in compressed airDust, can further ensure the result of use in process unit district.
Finally, the compressed air that water dew point and oily dew point all reach setting requirement leaves accurate filter F-03, sends into factory's wind defeatedSend pipeline.
Embodiment bis-:
Embodiment bis-is basic identical with the structure composition of embodiment mono-, and difference is:
Secondary filter separator F-01 is installed on N-1 level compressed air inlet pipe road. N-1 level compressed air is in the warm of ice chest E-01In fluid course, complete with cold fluid runner in liquid nitrogen complete after a heat exchange, temperature reduce. Secondary filter separator F-01 coupleThe compressed air that temperature reduces carries out gas-liquid separation, removes Yin Wendu and reduces and the condensed water of generation, makes to enter air compressor C-01The compressed air of next stage is drier, ensures the service life of air compressor C-01, makes compressor operating stable, reliable.
Embodiment tri-:
Embodiment tri-is basic identical with embodiment mono-structure composition, and difference is:
Compressed air surge tank V-05 is installed on compressed air piping, and accurate filter F-03 is connected with factory's wind surge tankV-03. Compressed air surge tank V-05 and the wind surge tank V-03 of factory cushion the pulsation of gas circuit medium, ensure wholeLoine pressure is stable.
Embodiment tetra-:
Embodiment tetra-is basic identical with embodiment mono-structure composition, and difference is:
Filler pipe is connected with methanol solution storage tank V-07, and dispenser pump P-01 is installed on filler pipe. It is empty that filler pipe can be deep into compressionIn gas surge tank V-05, and fog-spray nozzle is installed. The vaporific methanol solution of fog-spray nozzle ejection fully mixes with compressed air.
To the vaporific methanol solution of annotating in compressed air, be to freeze after compressed air heat exchange in order to prevent, avoid because of the icing pipe that causesRoad is stopped up, the stability of guarantee system operation.
Methanol solution drop in compressed air, when by main filter separator F-02 and accurate filter F-03, is removed,Can reclaim and use by factory.
Embodiment five:
Embodiment five is basic identical with embodiment mono-structure composition, and difference is:
Active carbon adsorber T-03 is installed on purification of compressed air pipeline, or accurate filter F-03, or charcoal absorptionDevice T-03 and accurate filter F-03. Be active carbon adsorber T-03 and accurate filter F-03 two on purification of compressed air pipelinePerson at least installs one.
Active carbon adsorber T-03 can be in the time that the filter core of accurate filter F-03 not be changed in time, and adsorption compression is airborne assortedMatter, as the filter plant for subsequent use of accurate filter F-103, ensures the quality of the factory's wind producing.
Embodiment six:
Embodiment six is basic identical with embodiment mono-structure composition, and difference is:
Cold fluid runner is parallel with the second air-heating type gasifier AH-01, connects or also between cold fluid runner and nitrogen storage tank V-01Be associated with electric heater E-07.
Gasify the nitrogen amount that cannot meet the nitrogen demand of process island time at liquid nitrogen by carry out heat exchange in ice chest E-01,Allow liquid nitrogen also simultaneously by the second air-heating type gasifier AH-01 or the electric heater E-07 gasification that heats up, to ensure techniqueThe nitrogen demand in district.
Embodiment seven:
Embodiment seven is basic identical with embodiment mono-structure composition, and difference is:
As shown in Figure 2, empty nitrogen station cold energy comprehensive reutilization system further comprises heat exchanger, low-grade fever drying tower T-01With refrigeration compressor C-02. Heat exchanger comprises forecooler E-02, evaporimeter E-04, remaining cold heat exchanger E-06, radiator.
Forecooler E-02, evaporimeter E-04 and remaining cold heat exchanger E-06 are provided with cold fluid runner and hot fluid runner.
The hot fluid runner of compressed air piping, forecooler E-02, the hot fluid runner of evaporimeter E-04, low-grade fever drying tower T-01,Purification of compressed air pipeline is connected successively.
After the cold fluid runner of forecooler E-02 and the series connection of the cold fluid runner of remaining cold heat exchanger E-06, with purification of compressed air pipeRoad parallel connection.
The cold fluid runner of evaporimeter E-04, the hot fluid runner of refrigeration compressor C-02, remaining cold heat exchanger E-06 series winding.
A compressed air part in compressed air piping has entered the hot fluid runner of ice chest E-01, and another part enters into precoolingIn the hot fluid runner of device E-02.
Leave main filter separator F-02 and enter the ducted compressed air of purification of compressed air, a part flows to accurate filterF-03, another part enters into the cold fluid runner of forecooler E-02.
In forecooler E-02, the compressed air temperature in hot fluid runner is 160 DEG C of left and right, and compression sky in cold fluid runnerGas is below-50 DEG C, and both have carried out heat exchange at forecooler E-02.
After heat exchange, the compressed air temperature in hot fluid runner is down to 10 DEG C of left and right, and continues to be fed into evaporimeter E-04'sIn hot fluid runner; And compressed air in cold fluid runner rises to 10 DEG C of left and right, and continue to be fed into remaining cold heat exchanger E-06Cold fluid runner in.
Meanwhile, refrigeration compressor C-02 becomes refrigerant compression after liquid, send in the hot fluid runner of remaining cold heat exchanger E-06,Medium by remaining cold heat exchanger E-06 cold fluid runner is cooling, then is inflated after valve throttling cooling, enters the cold of evaporimeter E-04Fluid course, cold-producing medium gasifies in evaporimeter E-04 cold fluid runner. Cold-producing medium heat absorption, the hot-fluid of absorption evaporimeter E-04Compressed-air actuated heat in body runner, in the hot fluid runner of evaporimeter E-04, compressed air temperature reduces, and refrigerant temperature literHeight, and get back to refrigeration compressor and again compressed.
The compressed air that temperature reduces leaves the hot fluid runner of evaporimeter E-04, enters into low-grade fever drying tower T-01, will beLine water dew point is down to below-50 DEG C, then sends back in purification of compressed air pipeline, and compressed air further passes through accurate filterAfter F-03, sending into process island uses. This one compressed air does not directly carry out heat exchange with liquid nitrogen, but has used and liquid nitrogen heatThe lower compressed-air actuated cold of temperature after exchange.
Compressed air in the cold fluid runner of remaining cold heat exchanger E-06 rises to normal temperature by 10 DEG C of left and right, then sends back to purify and pressesContracting air duct, further uses compressed air by sending into process island after accurate filter F-03. This one compressed air makesWith the compressed-air actuated heat of high temperature heat up.
This embodiment takes full advantage of compressed-air actuated heat energy and exchanges rear compressed-air actuated cold energy with liquid nitrogen, has further improvedThe utilization rate of the energy, has reduced factory cost.
Embodiment eight:
Embodiment eight is basic identical with embodiment seven structure compositions, and difference is:
Forecooler E-02 is in parallel or be connected with the first radiator E-03. In the time that the demand of process island factory wind is larger, forecoolerThe cold fluid runner of E-02 is reducing in compressed air temperature, further with its series winding, radiator the one E-03 in parallelAccelerate the speed of compressed air cooling, meet the demand of the high tolerance in process island. Remaining cold heat exchanger E-06 is in parallel or be connected with second looseHot device E-05, when the cold fluid runner of remaining cold heat exchanger E-06 reduces refrigerant temperature, falls apart with its series winding, in parallel secondHot device E-05 further accelerates the cooling rate of cold-producing medium, alleviates remaining cold heat exchanger E-06 load, ensures refrigeration compressor C-02Job stability, ensure the demand of process island high tolerance.
Embodiment nine:
Embodiment nine is basic identical with embodiment seven structure compositions, and difference is:
Between the hot fluid runner of forecooler E-02 and the hot fluid runner of evaporimeter E-04, branch road filter separator F-04 is installed;Between the hot fluid runner of evaporimeter E-04 and low-grade fever drying tower T-01, branch road filter separator F-04 is installed.
After compressed air is by the hot fluid runner of forecooler E-02 and the hot fluid runner of evaporimeter E-04, temperature reduces,Corresponding branch road filter separator F-04 removes compressed air Yin Wendu and reduces the condensed water and the oil that produce, has alleviated low-grade fever drying towerT-01 is the load that reaches water dew point, has improved the stability of operating efficiency and equipment operation.
Claims (10)
1. an empty nitrogen station cold energy comprehensive reutilization system, is characterized in that, comprises liquid nitrogen storage tank (V-01), nitrogen storage tank(V-02), instrument wind surge tank (V-03), ice chest (E-01), air compressor (C-01), main filter separator (F-02),Secondary filter separator (F-01), accurate filter (F-03);
In described ice chest (E-01), be provided with cold fluid runner and hot fluid runner;
Described air compressor (C-01) is compound compressor, and the progression of described compound compressor is N, described flow of heated fluidRoad is provided with N;
Described N is more than or equal to 2 integer;
Described cold fluid runner is connected with nitrogen storage tank (V-02) with liquid nitrogen storage tank (V-01) respectively;
The N-1 level outlet of described air compressor (C-01) is by N-1 level compressed air discharge duct and ice chest (E-01)N-1 level hot fluid runner be connected, described ice chest N-1 level hot fluid runner by N level compressed air inlet pipe road with described inThe N level entrance of air compressor (C-01) is connected;
The N level outlet of described air compressor (C-01) is by N level compressed air discharge duct and ice chest (E-01) NLevel hot fluid runner is connected, and described N level hot fluid runner is by shallow cold compression air duct and main filter separator (F-02)Be connected;
Described compressed air inlet pipe road is provided with secondary filter separator (F-01);
Described main filter separator (F-02) connects accurate filter (F-03) by purification of compressed air pipeline;
Compressed air surge tank (V-05) is installed on described compressed air discharge duct, and accurate filter (F-03) is connected with workFactory atmosphere surge tank (V-03);
Described compressed air surge tank (V-05) is connected with methyl alcohol storage tank (V-07) by filling pipeline, on described filling pipeline, pacifiesDispenser pump (P-01) is housed;
Active carbon adsorber (T-03), the first air-heating type gasifier (AH-02) are installed on described purification of compressed air pipeline;
Between described cold fluid runner and nitrogen storage tank (V-01), be in series or in parallel with electric heater (E-07), the second air temperature type gasChange device (AH-01).
2. empty nitrogen according to claim 1 station cold energy comprehensive reutilization system, is characterized in that, further comprises heat friendshipParallel operation, low-grade fever drying tower (T-01) and refrigeration compressor (C-02), described heat exchanger comprises forecooler (E-02), evaporationDevice (E-04), remaining cold heat exchanger (E-06), radiator,
The hot fluid runner of described N level compressed air discharge duct, forecooler (E-02), the hot fluid of evaporimeter (E-04)Runner, low-grade fever drying tower (T-01) are connected successively;
After the parallel connection of cold fluid runner or series connection of the cold fluid runner of described forecooler (E-02) and remaining cold heat exchanger (E-06),In parallel with purification of compressed air pipeline;
Described evaporimeter (E-04), refrigeration compressor (C-02), remaining cold heat exchanger (E-06) are contacted successively by refrigerant line;
Described forecooler (E-02) and remaining cold heat exchanger (E-06) are in parallel or be connected with the first radiator (E-03) and the respectivelySecond radiator (E-05);
Between the hot fluid runner that described forecooler (E-02) and evaporimeter (E-04) are connected, branch road filter separator is installed(F-04)；
Between the hot fluid runner that described evaporimeter (E-04) and low-grade fever drying tower (T-01) are connected, branch road isolated by filtration is installedDevice (F-04).
3. an empty nitrogen station cold energy comprehensive reutilization method, is characterized in that, step is as follows:
1) liquid nitrogen in liquid nitrogen storage tank (V-01) is passed in the cold fluid runner of ice chest (E-01) and carries out heat exchange, by liquidNitrogen, and be sent in nitrogen storage tank (V-02);
2) air is through 1 grading row air compressing of air compressor (C-01), then by 1 grade of compressed air discharge ductThe 1 grade of hot fluid runner that is sent to ice chest (E-01) carries out heat exchange, sends into air compressor (C-01) after heat exchange2 grading steps are carried out air compressing, are then sent to 2 grades of heat of ice chest (E-01) by 2 grades of compressed air discharge ductsFluid course carries out heat exchange;
3) air compressor (C-01) is according to step 2) mode carry out step by step successively air compressing, until compressed air reachesSet requirement, be then sent to main filtration by afterbody heat exchanger tube and the purification of compressed air pipeline of ice chest (E-01)Separator (F-02), filters out condensed water and oil in compressed air, compressed-air actuated water dew point and oily dew point is reached and establishProvisioning request;
4) main filter separator (F-02) is sent to accurate filter (F-03) by compressed air by purification of compressed air pipeline,Further remove water and the greasy dirt in compressed air, make compressed-air actuated water dew point and oily dew point reach setting requirement, then willCompressed air is sent into factory's air pipe line.
4. empty nitrogen station cold energy comprehensive reutilization method according to claim 3, is characterized in that, except ice chest (E-01)Beyond final stage hot fluid runner, compressed air is undertaken after heat exchange, by mistake by the hot fluid runners at different levels of ice chest (E-01)Filter separator (F-01), isolates the water in compressed air, then enters air compressor next stage and carry out further air compressing.
5. empty nitrogen station cold energy comprehensive reutilization method according to claim 3, is characterized in that, to compressed air surge tank(V-05) in, pass into vaporific methanol solution, after vaporific methanol solution is fully mixed with compressed air, then enter ice chest (E-01)Hot fluid runner in carry out heat exchange.
6. empty nitrogen station cold energy comprehensive reutilization method according to claim 3, is characterized in that main filter separator (F-02)Compressed air is first sent into the first air-heating type gasifier (AH-02) by shallow cold compression air duct and heat up, send into activityThe airborne impurity of charcoal absorber (T-03) adsorption compression, then enter accurate filter (F-03).
7. empty nitrogen station cold energy comprehensive reutilization method according to claim 3, is characterized in that liquid nitrogen storage tank (V-01)In liquid nitrogen can enter the second air-heating type gasifier (AH-01), or electric heater (E-07) and the second air-heating type gasifier(AH-01), heat up and be gasificated into nitrogen, then enter into nitrogen storage tank (V-02).
8. empty nitrogen station cold energy comprehensive reutilization method according to claim 3, is characterized in that described N level compressed airThe hot fluid runner that compressed air in discharge duct enters into forecooler (E-02) carries out heat exchange, then enters evaporimeter(E-04) the hot fluid runner in carries out heat exchange again, then passes through low-grade fever drying tower (T-01) by compressed-air actuated onlineWater dew point is down to setting requirement, finally sends into purification of compressed air pipeline;
The cold fluid runner that the shallow cold compression air that flows out main filter separator (F-02) enters forecooler (E-02) carries out heat and hands overChange, the cold fluid runner that then enters remaining cold heat exchanger (E-06) carries out heat exchange, finally sends purification of compressed air pipeline back to;
Refrigeration compressor (C-02) is by after refrigerant compression, and the hot fluid runner of sending into remaining cold heat exchanger (E-06) carries out heat and hands overChange, after expansion valve expenditure and pressure, the cold fluid runner that enters evaporimeter (E-04) carries out heat exchange, finally gets back to refrigeration and pressesContracting machine (C-02) compresses again.
9. empty nitrogen station cold energy comprehensive reutilization method according to claim 3, is characterized in that, described compressed air leavesAfter the hot fluid runner of forecooler (E-02), remove condensed water by branch road filter separator (F-04); Described compressed airLeave after the hot fluid runner of evaporimeter (E-04), remove condensed water by branch road filter separator (F-04).
10. empty nitrogen station cold energy comprehensive reutilization method according to claim 3, is characterized in that, compressed air enters in advanceWhen carrying out heat exchange in the hot fluid runner of cooler (E-02), the forecooler (E-03) that enters series connection with it or parallel connection entersRow heat radiation; When the hot fluid runner that cold-producing medium enters remaining cold heat exchanger (E-06) carries out heat exchange, enter series connection with it orCryogen radiator (E-03) in parallel dispels the heat.
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| CN105605419B (en) | 2018-08-07 |
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