CN204006965U - A kind of liquid oxygen and liquid nitrogen device for making - Google Patents
A kind of liquid oxygen and liquid nitrogen device for making Download PDFInfo
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- CN204006965U CN204006965U CN201420369680.XU CN201420369680U CN204006965U CN 204006965 U CN204006965 U CN 204006965U CN 201420369680 U CN201420369680 U CN 201420369680U CN 204006965 U CN204006965 U CN 204006965U
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04284—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams
- F25J3/0429—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams of feed air, e.g. used as waste or product air or expanded into an auxiliary column
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04006—Providing pressurised feed air or process streams within or from the air fractionation unit
- F25J3/04012—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling
- F25J3/04018—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of warm gaseous streams; details of intake or interstage cooling of main feed air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
- F25J3/04163—Hot end purification of the feed air
- F25J3/04169—Hot end purification of the feed air by adsorption of the impurities
- F25J3/04181—Regenerating the adsorbents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—Generation of cold for compensating heat leaks or liquid production, e.g. by Joule-Thompson expansion
- F25J3/04375—Details relating to the work expansion, e.g. process parameter etc.
- F25J3/04381—Details relating to the work expansion, e.g. process parameter etc. using work extraction by mechanical coupling of compression and expansion so-called companders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2215/00—Processes characterised by the type or other details of the product stream
- F25J2215/40—Air or oxygen enriched air, i.e. generally less than 30mol% of O2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/40—Processes or apparatus involving steps for recycling of process streams the recycled stream being air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/50—Processes or apparatus involving steps for recycling of process streams the recycled stream being oxygen
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model relates to a kind of liquid oxygen and liquid nitrogen device for making, and this device comprises self-cleaning air filter, air compressor machine, cold air unit, separator, molecular sieve adsorber, main heat exchanger, Xia Ta, Shang Ta, subcooler and decompressor.The raw material of this device is air, then air enters ice chest by pressurized end, cold air unit, the molecular sieve adsorber of self-cleaning air filter, air compressor machine, decompressor successively, the expanding end that enters turbo-expander from the extraction of main heat exchanger middle and lower part through main heat exchanger rear portion air carries out adiabatic expansion, and the air after expansion is sent ice chest after heat exchanger re-heat; Remainder air is cooled to and goes out main heat exchanger after liquefaction point and enter Xia Ta and carry out rectifying.Then liquid oxygen product is extracted out and is carried to liquid oxygen storage tank from the bottom of lower tower, and liquid nitrogen product is extracted out and carried to liquid nitrogen storage from main cold liquid nitrogen side.The disclosed device of the utility model is simple to operate, recovery rate is high and energy consumption is low, and equipment investment cost is low simultaneously.
Description
Technical field
The utility model relates to air separation field, relates in particular to a kind of liquid oxygen and liquid nitrogen device for making.
Background technology
Along with the fast development of all trades and professions, to the required amount of industrial gasses, also there is the demand of larger growth, particularly liquid form product to rise year by year, the annual speed with 15%～20% increases.Because liquid space division product has, convenient store, supply facilitates, ensure the quality of products, transfer efficiency advantages of higher is more and more adopted by user, market potential is very large.If only depend on air separation plant byproduct not can meet the demand in market, the application of full air separation units producing liquids device has become a kind of trend.Along with the very big improvement of traffic and in order to pursue higher economic benefit, liquid air goods, with features such as its good quality, lower cost of transportation, the good ratio of performance to price and safe readies, are more and more subject to user's favor; Though and China is vast in territory, the supply of industrial gasses reaches far away developed country can cover with central gas supply the scale of up to a hundred kilometers, so liquid sale just becomes a kind of good selection of gas companies.Meanwhile, fluid product can also be allocated the situation of each department product unevenness between supply and demand preferably, and along with the further normalization that medical oxygen is used, utilizing liquid oxygen to produce medical oxygen also becomes a kind of trend.
Full air separation units producing liquids production mainly adopts cryogenic rectification separating technology, and the difference of utilizing each component evaporating temperature in air is separated and obtain fluid product by their.The raw material of air separation unit is atmosphere, and its main consumption is the energy, especially more crucial to the height of full liquid space division energy consumption.Therefore, in full liquid space division device, how further to fall low-energy-consumption and seem particularly important; And user requires more and more lower to energy consumption index, user and supplier more and more pay close attention to energy consumption index.For the complete set of equipments that adopts cryogenic rectification, recovery rate and energy consumption become the major parameter of evaluating complete set of equipments economic indicator and technical indicator; Air separation plant is large electricity consumer, the in the situation that of energy growing tension, for the user who uses full air separation units producing liquids, for they provide more low power technology flow process, development and production go out the complexes that product recovery rate is high, not only can accomplish to reduce energy consumption, reduce production costs, to the energy demand being becoming tight day, also can play certain mitigation.
The flow process that liquid space division adopts at present mainly contains air direct expansion circularly cooling flow process, has low pressure outer circulation swell refrigeration flow process, the middle pressure outer circulation swell refrigeration flow process of precooling and have middle pressure outer circulation swell refrigeration flow process of precooling etc.Above Process flow all needs to adopt extra supercharging air machine or nitrogen supercharging machine to carry out supercharging to unstrpped gas, increases operation easier.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art and provides that a kind of energy consumption is low, liquid oxygen and the liquid nitrogen device for making of liquid oxygen and liquid nitrogen are simply extracted in technological process by air separation.
The technical solution of the utility model is achieved in that a kind of liquid oxygen and liquid nitrogen device for making, comprise air compression system, chilldown system, purification system and ice chest, described air compression system comprises the air compressor machine that air cleaner and air cleaner are connected, described chilldown system comprises cold air unit, described purification system comprises molecular sieve adsorber, electric heater and muffler, and described ice chest comprises expanding end and the fractionating column of main heat exchanger, decompressor, described air compressor machine is connected with the pressurized end of a decompressor by the first pipeline, described pressurized end connects a cold air unit by second pipe, described cold air unit connects a separator by the 3rd pipeline, described separator is connected with molecular sieve adsorber by the 4th pipeline, the exit of described molecular sieve adsorber arranges the 5th pipeline, described the 5th pipeline is connected with two pipelines after a main heat exchanger: the 6th pipeline and the 7th pipeline, described the 7th pipeline is connected to the expanding end of decompressor described in, described the 6th pipeline is connected to the place, Xia Ta gas access of fractionating column through first throttle valve, the exit of described decompressor connects the 8th pipeline, described the 8th pipeline is connected to the purification system of ice chest outside after main heat exchanger, described fractionating column comprises tower, lower tower and the condenser/evaporator between Shang Ta and lower tower, the liquid outlet of described lower top of tower connects the 9th pipeline, the liquid outlet of described lower tower bottom connects the tenth pipeline, described the 9th pipeline is connected to described upper tower middle part after a subcooler and the second choke valve, described the tenth pipeline is connected to the top of described upper tower after described subcooler and the 3rd choke valve, the dirty gas outlet of described upper top of tower connects the 11 pipeline, the dirty gas outlet of described condenser/evaporator top connects 1 the 12 pipeline, described the 11 pipeline and described the 12 pipeline are connected to the purification system of ice chest outside after main heat exchanger, the liquid oxygen side outlet place of described condenser/evaporator connects the 13 pipeline, described the 13 pipeline is through being connected on the liquid oxygen storage tank of ice chest outside by the 4th choke valve, the nitrogen side outlet place of described condenser-reboiler connects the 14 pipeline, described the 14 pipeline is connected on the nitrogen storage tank of ice chest outside after subcooler and the 5th choke valve.
Described upper tower be the number of plates be 38 ~ 45 or corresponding tower tray number be 45 ~ 72 dish sieve plates under tower, described upper tower be the number of plates be 50 ~ 80 or corresponding tower tray number be 72 ~ 108 dish structured packings on tower.
Described main heat exchanger and subcooler are aluminum fin formula heat exchanger.
The good effect that the technical solution of the utility model produces is as follows:
The air of the pressurized end of the turbo-expander of this device is to carry out whole superchargings from the gas after air compressor compression, the gas of the expanding end of decompressor is from the gas of molecular sieve adsorber, through heat exchanger middle part extraction unit lease making pipeline, entering expanding end expands, expansion goes molecular sieve as regeneration gas after by heat exchanger heat exchange, for air separation unit provides cold; Liquid oxygen product extracts from condenser/evaporator the inside, sends into liquid oxygen storage tank after piping and valve; Liquid nitrogen product is extracted out through subcooler and is crossed and coldly by pipeline and valve, send into liquid nitrogen storage from lower top of tower.
Described rectifying column adopts sieve-plate tower, good effect of heat exchange; Described rectifying column adopts packed tower, and operating flexibility is large, is applicable to Off-design operation; Described main heat exchanger and subcooler are aluminum fin formula heat exchanger, good effect of heat exchange; Described liquid nitrogen product is crossed after cold and is extracted out through subcooler, can increase liquid nitrogen degree of supercooling, reduces into storage tank gasification loss.
The utility model adopt a kind of simple to operate, without air or nitrogen supercharging machine, product recovery rate is high, floor space is little Process flow, obtain liquid form product, not only energy consumption is low, technological process is simple, and it is high to produce efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of liquid oxygen of the present utility model and liquid nitrogen device for making.
In figure, be labeled as: 1, self-cleaning air filter; 2, air compressor machine; 3, the pressurized end of turbo-expander; 4, cold air unit; 5, separator; 6, molecular sieve adsorber; 7, electric heater; 8, the first muffler; 9, the second muffler; 10, main heat exchanger; 11, the expanding end of turbo-expander; 12, Xia Ta; 13, subcooler; 14, condenser/evaporator; 15, Shang Ta; 16, ice chest; 17, first throttle valve; 18, the second choke valve; 19, the 3rd choke valve; 20, the 4th choke valve; 21, the 5th choke valve; 22, liquid oxygen storage tank; 23, liquid nitrogen storage; 24, cooler; 101, the first pipeline; 102, second pipe; 103, the 3rd pipeline; 104, the 4th pipeline; 105, the 5th pipeline; 106, the 6th pipeline; 107, the 7th pipeline; 108, the 8th pipeline; 109, the 9th pipeline; 110, the tenth pipeline; 111, the 11 pipeline; 112, the 12 pipeline; 113, the 13 pipeline; 114, the 14 pipeline.
The specific embodiment
Embodiment mono-
A kind of liquid oxygen and liquid nitrogen device for making, as shown in Figure 1, comprise air compression system, chilldown system, purification system and ice chest 16, described air compression system comprises the air compressor machine 2 that self-cleaning air filter 1 and self-cleaning air filter are connected, described chilldown system comprises cooler 24 and cold air unit 4, described purification system comprises molecular sieve adsorber 6, electric heater 7, the first muffler 8 and the second muffler 9, after the dirty nitrogen to 175 that electric heater heating ice chest is come ℃, send into molecular sieve adsorber and carry out regenerating molecular sieve, muffler is dirty nitrogen, the effect abating the noise is played in the emptying of nitrogen, described ice chest comprises main heat exchanger 10, expanding end 11 and the fractionating column of turbo-expander, described air compressor machine is connected with the pressurized end 3 of a turbo-expander by the first pipeline 101, the pressurized end of described turbo-expander connects described cooler by second pipe 102, from the second pipe of chiller treatment, be connected to described cold air unit, described cold air unit connects a separator 5 by the 3rd pipeline 103, described separator is connected with molecular sieve adsorber 6 by the 4th pipeline 104, the exit of described molecular sieve adsorber arranges the 5th pipeline 105, described the 5th pipeline is connected with two pipelines after a main heat exchanger: the 6th pipeline 106 and the 7th pipeline 107, described the 7th pipeline is connected to the expanding end of turbo-expander described in, described the 6th pipeline is connected to the place, Xia Ta gas access of fractionating column through first throttle valve 17, the exit of the expanding end of described turbo-expander connects the 8th pipeline 108, described the 8th pipeline is connected to the purification system of ice chest outside after main heat exchanger, described fractionating column comprises tower 15, 12 times towers and the condenser/evaporator 14 between Shang Ta and lower tower, the liquid outlet of described lower top of tower connects the 9th pipeline 109, the liquid outlet of described lower tower bottom connects the tenth pipeline 110, described the 9th pipeline is connected to described upper tower middle part after a subcooler 13 and the second choke valve 18, described the tenth pipeline is connected to the top of described upper tower after described subcooler and the 3rd choke valve 19, the dirty gas outlet of described upper top of tower connects the 11 pipeline 111, the dirty gas outlet of described condenser/evaporator top connects 1 the 12 pipeline, described the 11 pipeline and described the 12 pipeline 112 are connected to the purification system of ice chest outside after main heat exchanger, the liquid oxygen side outlet place of described condenser/evaporator connects the 13 pipeline 113, described the 13 pipeline is through being connected on the liquid oxygen storage tank 22 of ice chest outside by the 4th choke valve 20, the nitrogen side outlet place of described condenser-reboiler connects the 14 pipeline 114, described the 14 pipeline is connected on the nitrogen storage tank 23 of ice chest outside after subcooler and the 5th choke valve 21.
Described in described lower tower, condenser/evaporator machine, upper tower is integral type equipment complex, described upper tower be the number of plates be 38 ~ 45 or corresponding tower tray number be 45 ~ 72 dish sieve plates under tower, described upper tower be the number of plates be 50 ~ 80 or corresponding tower tray number be 72 ~ 108 dish structured packings on tower.
Described main heat exchanger and subcooler are aluminum fin formula heat exchanger.
Embodiment bis-
Liquid oxygen and a liquid nitrogen preparation method, utilize liquid oxygen and liquid nitrogen device for making, and this device is a kind of liquid oxygen and liquid nitrogen device for making of embodiment, and this is no longer going to repeat them.The method comprises:
1) this device raw material is air, air enters air compressor machine 2 after first filtering out impurity by self-cleaning air filter 1, gas pressure after compression is 0.6 ~ 1.0MPa, temperature is 40 ℃, the pressurized end 3 that gas after compressed directly enters turbo-expander carries out supercharging, supercharging enters air conditioner group 4 after being cooled to 40 ℃ by cooler 24 and is again cooled to 5 ~ 8 ℃, cooled gas enters molecular sieve adsorber absorption after separator 5 separates free water, gas adsorbs to fall water through absorber, after carbon dioxide and hydrocarbon partial, enter ice chest 16, through main heat exchanger 10 and the dirty nitrogen backflowing, oxygen, nitrogen carries out heat exchange, portion of air is extracted out from main heat exchanger middle and lower part, temperature is that-100 ~-130 ℃ of expanding ends 11 that enter turbo-expander carry out adiabatic expansion, air pressure after expansion is 25kpa, after main heat exchanger re-heat, send ice chest, remainder air is cooled to and goes out main heat exchanger after liquefaction point and enter lower tower 12 and carry out rectifying,
2) lower tower obtains pure nitrogen gas and liquid nitrogen at tower top, and purity contains oxygen for being less than 100PPmO
2; It at the bottom of tower, is 38% oxygen-enriched liquid air; The required phegma of lower tower is from the condenser/evaporator 14 of lower top of tower, and here oxygen is evaporated, and nitrogen obtains condensation; Part liquid nitrogen is returned lower tower as phegma, and another part liquid nitrogen is crossed cold deutomerite through subcooler 13 and flow to upper top of tower spray, tower rectifying in participation; From the oxygen-enriched liquid air of lower tower tower reactor, through subcooler, to cross and enter upper tower middle part after cold and participate in rectifying, through main heat exchanger re-heat, the gas after expansion goes purification system to make regeneration gas after mixing to the dirty nitrogen of extracting out at upper top of tower; Liquid oxygen product is extracted then throttling out and carries to liquid oxygen storage tank 22 from condenser/evaporator liquid oxygen side, liquid nitrogen product from condenser/evaporator liquid nitrogen side extract out through subcooler cross cold after throttling carrying to liquid nitrogen storage 23.
Claims (3)
1. a liquid oxygen and liquid nitrogen device for making, comprise air compression system, chilldown system, purification system and ice chest, it is characterized in that: described air compression system comprises the air compressor machine that air cleaner and air cleaner are connected, described chilldown system comprises cold air unit, described purification system comprises molecular sieve adsorber, electric heater and muffler, and described ice chest comprises expanding end and the fractionating column of main heat exchanger, decompressor, described air compressor machine is connected with the pressurized end of a decompressor by the first pipeline, described pressurized end connects a cold air unit by second pipe, described cold air unit connects a separator by the 3rd pipeline, described separator is connected with molecular sieve adsorber by the 4th pipeline, the exit of described molecular sieve adsorber arranges the 5th pipeline, described the 5th pipeline is connected with two pipelines after a main heat exchanger: the 6th pipeline and the 7th pipeline, described the 7th pipeline is connected to the expanding end of decompressor described in, described the 6th pipeline is connected to the place, Xia Ta gas access of fractionating column through first throttle valve, the exit of described decompressor connects the 8th pipeline, described the 8th pipeline is connected to the purification system of ice chest outside after main heat exchanger, described fractionating column comprises tower, lower tower and the condenser/evaporator between Shang Ta and lower tower, the liquid outlet of described lower top of tower connects the 9th pipeline, the liquid outlet of described lower tower bottom connects the tenth pipeline, described the 9th pipeline is connected to described upper tower middle part after a subcooler and the second choke valve, described the tenth pipeline is connected to the top of described upper tower after described subcooler and the 3rd choke valve, the dirty gas outlet of described upper top of tower connects the 11 pipeline, the dirty gas outlet of described condenser/evaporator top connects 1 the 12 pipeline, described the 11 pipeline and described the 12 pipeline are connected to the purification system of ice chest outside after main heat exchanger, the liquid oxygen side outlet place of described condenser/evaporator connects the 13 pipeline, described the 13 pipeline is through being connected on the liquid oxygen storage tank of ice chest outside by the 4th choke valve, the nitrogen side outlet place of described condenser-reboiler connects the 14 pipeline, described the 14 pipeline is connected on the nitrogen storage tank of ice chest outside after subcooler and the 5th choke valve.
2. a kind of liquid oxygen according to claim 1 and liquid nitrogen device for making, it is characterized in that: described upper tower be the number of plates be 38 ~ 45 or corresponding tower tray number be 45 ~ 72 dish sieve plates under tower, described upper tower be the number of plates be 50 ~ 80 or corresponding tower tray number be 72 ~ 108 dish structured packings on tower.
3. a kind of liquid oxygen according to claim 1 and liquid nitrogen device for making, is characterized in that: described main heat exchanger and subcooler are aluminum fin formula heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420369680.XU CN204006965U (en) | 2014-07-07 | 2014-07-07 | A kind of liquid oxygen and liquid nitrogen device for making |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420369680.XU CN204006965U (en) | 2014-07-07 | 2014-07-07 | A kind of liquid oxygen and liquid nitrogen device for making |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061757A (en) * | 2014-07-07 | 2014-09-24 | 开封空分集团有限公司 | Liquid oxygen and liquid nitrogen preparation device and method |
| CN105758117A (en) * | 2014-12-19 | 2016-07-13 | 常熟市永安工业气体制造有限公司 | Pure nitrogen preparation method |
| CN106595221A (en) * | 2015-10-20 | 2017-04-26 | 乔治洛德方法研究和开发液化空气有限公司 | Oxygen production system and oxygen production method |
| CN111412695A (en) * | 2020-03-25 | 2020-07-14 | 西安交通大学 | Super supercooled liquid oxygen acquisition system based on liquid oxygen and liquid nitrogen mixing and vacuumizing |
| CN114715862A (en) * | 2022-03-28 | 2022-07-08 | 开封中新洁能科技有限公司 | Nitrogen trifluoride purification process |
-
2014
- 2014-07-07 CN CN201420369680.XU patent/CN204006965U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061757A (en) * | 2014-07-07 | 2014-09-24 | 开封空分集团有限公司 | Liquid oxygen and liquid nitrogen preparation device and method |
| CN104061757B (en) * | 2014-07-07 | 2016-09-07 | 开封空分集团有限公司 | A kind of liquid oxygen and liquid nitrogen device for making and method |
| CN105758117A (en) * | 2014-12-19 | 2016-07-13 | 常熟市永安工业气体制造有限公司 | Pure nitrogen preparation method |
| CN106595221A (en) * | 2015-10-20 | 2017-04-26 | 乔治洛德方法研究和开发液化空气有限公司 | Oxygen production system and oxygen production method |
| CN111412695A (en) * | 2020-03-25 | 2020-07-14 | 西安交通大学 | Super supercooled liquid oxygen acquisition system based on liquid oxygen and liquid nitrogen mixing and vacuumizing |
| CN114715862A (en) * | 2022-03-28 | 2022-07-08 | 开封中新洁能科技有限公司 | Nitrogen trifluoride purification process |
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