CN108362074A - A kind of method and apparatus for extracting krypton and xenon from Extra large air separation plant - Google Patents
A kind of method and apparatus for extracting krypton and xenon from Extra large air separation plant Download PDFInfo
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- CN108362074A CN108362074A CN201810249809.6A CN201810249809A CN108362074A CN 108362074 A CN108362074 A CN 108362074A CN 201810249809 A CN201810249809 A CN 201810249809A CN 108362074 A CN108362074 A CN 108362074A
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- Prior art keywords
- xenon
- tower
- krypton
- poor
- evaporator
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- 229910052743 krypton Inorganic materials 0.000 title claims abstract description 46
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910052724 xenon Inorganic materials 0.000 title claims abstract description 46
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 238000000926 separation method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 19
- PDEXVOWZLSWEJB-UHFFFAOYSA-N krypton xenon Chemical compound [Kr].[Xe] PDEXVOWZLSWEJB-UHFFFAOYSA-N 0.000 claims abstract description 144
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000005201 scrubbing Methods 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 24
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000001301 oxygen Substances 0.000 claims abstract description 23
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 23
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 86
- 229910052786 argon Inorganic materials 0.000 claims description 43
- 239000007789 gas Substances 0.000 claims description 17
- 238000000746 purification Methods 0.000 claims description 17
- 238000001704 evaporation Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 12
- 239000002994 raw material Substances 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 230000004941 influx Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 238000011027 product recovery Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 17
- 230000000630 rising effect Effects 0.000 description 5
- 238000000605 extraction Methods 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000004094 preconcentration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- -1 carbon hydrocarbon compound Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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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
- F25J3/04642—Recovering noble gases from air
- F25J3/04745—Krypton and/or Xenon
-
- 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
-
- 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
- F25J3/04078—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression
- F25J3/0409—Providing pressurised feed air or process streams within or from the air fractionation unit providing pressurized products by liquid compression and vaporisation with cold recovery, i.e. so-called internal compression of oxygen
-
- 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
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
- F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
- F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
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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
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04866—Construction and layout of air fractionation equipments, e.g. valves, machines
- F25J3/04872—Vertical layout of cold equipments within in the cold box, e.g. columns, heat exchangers etc.
- F25J3/04878—Side by side arrangement of multiple vessels in a main column system, wherein the vessels are normally mounted one upon the other or forming different sections of the same 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
- F25J2200/00—Processes or apparatus using separation by rectification
- F25J2200/34—Processes or apparatus using separation by rectification using a side column fed by a stream from the low 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
- F25J2215/50—Oxygen or special cases, e.g. isotope-mixtures or low purity O2
- F25J2215/52—Oxygen production with multiple purity O2
-
- 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
- F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
- F25J2235/50—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being oxygen
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Emergency Medicine (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The method and apparatus that the invention discloses a kind of to extract krypton and xenon from Extra large air separation plant, this method and device, the arrangement of upper tower landing is used for Extra large air separation plant, main condenser evaporator is placed in the characteristics of on lower tower, liquid oxygen collection liquid space is set in upper tower bottom, and poor krypton xenon scrubbing tower is set at the top of main condenser evaporator.The liquid oxygen taken out from upper tower bottom enters the progress rectifying of poor krypton xenon scrubbing tower after the pressurization of liquid oxygen elevator pump, concentration is evaporated subsequently into main condenser evaporator, after finally entering poor krypton xenon scrubbing tower progress level-one or two stage rectification, obtains the liquid containing krypton and xenon.Lower tower nitrogen or lower tower positive stream air this method can be used in the heat source of poor krypton xenon concentration tower and device is suitable for the Nm3/h grade Extra large air separation plants of 80,000 Nm3/h ~ 120,000, has the characteristics that safety is good, reliability is high, krypton xenon recovery rate is high, oxygen product recovery rate is stablized.
Description
Technical field
The present invention relates to technical field of air separation, and krypton and xenon are extracted from Extra large air separation plant more particularly to one kind
Method and apparatus.
Background technology
Krypton, xenon have a wide range of applications as rare gas in fields such as illumination, Aerospace Satellite and medical industries.Air
In the content of krypton be 1.14ppm, the content of xenon is 0.086ppm, and krypton, xenon are mainly extracted from the byproduct of air separation plant.With
It air separation plant towards Nm3/h grade super-hugeization of 80,000 Nm3/h ~ 120,000 to develop, rare gas is extracted from Extra large air separation plant
Body contains huge economic value.
Currently, domestic krypton-xenon recovery plant focuses mostly in the 60000 following air separation plants of Nm3/h grades.For 60,000 Nm3/h
The extraction of the following air separation plant of grade, traditional krypton xenon generally has 2 kinds of modes：One is to produce the external pressure based on gas oxygen product
Contracting flow air separation plant carries out krypton, xenon pre-concentration by raw material of liquid oxygen；Another kind is that the space division of liquid oxygen pump Internal-compression flow is set
It is standby, since a large amount of liquid oxygen are extracted out from condenser/evaporator, it is impossible to krypton-xenon concentrate is extracted from liquid oxygen, using oxygen-enriched liquid air as raw material
Carry out krypton, xenon pre-concentration.
And for the Nm3/h grade Extra large air separation plants of 80,000 Nm3/h ~ 120,000, generally liquid oxygen pump Internal-compression flow, by
In the enlargement of equipment, technological process tissue and equipment arrangement have compared with the 60000 following air separation plants of Nm3/h grades compared with
Big difference：On the basis of compressing technological process in conventional liquid oxygen, using the scheme suitable for Extra large air separation plant ---
Upper tower landing is arranged in parallel with lower tower, and main condenser evaporator is placed on lower tower, adds liquid oxygen elevator pump, high pressure liquid oxygen product
It is extracted from upper tower bottom.According to Extra large air separation plant feature, original krypton xenon extracting mode is no longer applicable in.Therefore, it is necessary to
It is proposed the krypton and xenon extraction system suitable for the Nm3/h grade Extra large air separation plants of 80,000 Nm3/h ~ 120,000.
Invention content
It is an object of the invention to：Overcome the above-mentioned problems in the prior art, proposes that one kind is set from super-huge space division
The method and apparatus of standby middle extraction krypton and xenon, make poor krypton xenon scrubbing tower be arranged in main condenser evaporator top, the above tower bottom liquid
Oxygen is raw material so that is stablized into poor krypton xenon scrubbing tower liquid oxygen amount, main condenser Load Evaporator is stablized, and krypton xenon recovery rate is higher.
The purpose of the present invention is realized by following technical proposals：
A kind of device extracting krypton and xenon from Extra large air separation plant, including：Xia Ta, upper tower, main condenser evaporator, liquid oxygen carry
Pump, poor krypton xenon scrubbing tower, poor krypton xenon concentration tower and poor krypton xenon evaporator, the lower tower bottom is risen with raw air inlet pipe to be connected
It connects, there is the raw air inlet pipe branch to be connected with the import of poor krypton xenon evaporator, and the tops Xia Ta are provided with poor krypton
Xenon scrubbing tower is provided with main condenser evaporator in the poor krypton xenon scrubbing tower, and the main condenser evaporator and lower tower pass through pipeline
Connection, the poor krypton xenon scrubbing tower top and poor krypton xenon concentration tower top after pipe influx with upper tower bottom by being connected, institute
It states and is connected to respectively with upper tower bottom at the top of poor krypton xenon concentration tower by pipeline at the top of poor krypton xenon scrubbing tower, the upper tower bottom is logical
It crosses at the top of High Pressure Liquid Oxygen Pump and poor krypton xenon scrubbing tower and is connected to, the poor krypton xenon evaporator outlet and lower tower bottom pass through oxygen-enriched liquid pipe
It is connected to upper tower after collecting, there is fixed gas outlet pipe, the poor krypton xenon base of evaporator to have poor on the main condenser evaporator
Krypton xenon outlet pipe.
A kind of device extracting krypton and xenon from Extra large air separation plant of the present invention, also has in the High Pressure Liquid Oxygen Pump
Liquid oxygen product outlet pipe, the liquid oxygen product outlet pipe are connected with subcooler.
A kind of device extracting krypton and xenon from Extra large air separation plant of the present invention, the upper tower bottom have high pressure liquid
Oxygen pump is connected with high pressure liquid oxygen outlet pipe in the High Pressure Liquid Oxygen Pump, and the high pressure liquid oxygen outlet pipe is connect with heat exchanger.
A kind of device extracting krypton and xenon from Extra large air separation plant of the present invention, the upper tower outside have argon purification
System, the argon purification system include：Crude argon column and crude argon condenser, the upper tower are carried out two-way mutual by pipeline crude argon column
It is logical, it is connected to upper tower by pipeline at the top and bottom of the crude argon condenser, the subcooler is condensed by pipeline and crude argon
Device is connected, and has crude argon outlet pipe on the crude argon condenser.
A kind of device extracting krypton and xenon from Extra large air separation plant of the present invention also has second level krypton xenon purification system
System, the second level krypton xenon purification system include：The poor krypton xenon scrubbing tower of two level and the poor krypton xenon evaporator of two level, the poor krypton of two level
It is connected with poor krypton xenon concentration tower by pipeline at the top of xenon scrubbing tower, the poor krypton xenon outlet pipe and the poor krypton xenon scrubbing tower top of two level
It is connected, the poor krypton xenon evaporator of two level is connected with raw air inlet pipe, the poor krypton xenon evaporator outlet of two level
It is connected with oxygen-enriched liquid pipe, the poor krypton xenon wash tower bottoms of two level have the poor krypton xenon outlet pipe of two level.
A kind of extracting method of krypton and xenon, includes the following steps：
S1, raw air A1 obtain oxygen-enriched liquid air after lower tower rectifying；
S2, oxygen-enriched liquid air after depressurizing throttling by sending to crude argon column；
S3, oxygen-enriched liquid air obtain the higher liquid oxygen of xenon concentration containing krypton after upper tower carries out rectifying；
S4, liquid oxygen are introduced into poor krypton xenon scrubbing tower and carry out rectifying, are evaporated subsequently into main condenser；
S5, the liquid oxygen after the evaporation of main condenser is sent into poor krypton xenon concentration tower and poor krypton xenon evaporator further evaporates；
S6, the fluid product containing krypton and xenon is obtained at the product end of poor krypton xenon concentration tower and poor krypton xenon evaporator；
S7, the product that previous step obtains is further processed to the concentration of needs and state.
The extracting method of a kind of krypton and xenon of the present invention, the S6 steps are carried out with second level purification process later.
The extracting method of a kind of krypton and xenon of the present invention, the heat source of the part of the raw air A1 as crude argon column.
A kind of extracting method of krypton and xenon, the liquid oxygen of the main condenser are largely back to tower bottom, main cold to make
The liquid oxygen of solidifying evaporator keeps certain circulating ratio.
According to above-mentioned technical proposal, the beneficial effects of the invention are as follows：
1, it is suitable for the Nm3/h grade Extra large air separation plants of 80,000 Nm3/h ~ 120,000, safety is good, and reliability is high.
2, poor krypton xenon scrubbing tower setting is on main condenser evaporator top, and the above tower bottom liquid oxygen is raw material so that into poor krypton
Xenon scrubbing tower liquid oxygen amount is stablized, and main condenser Load Evaporator is stablized, and krypton xenon recovery rate is higher.
3, poor krypton xenon is extracted by raw material of liquid oxygen, only part oxygen has been taken away in poor krypton xenon product, to oxygen product recovery rate
Do not influence.
4, most of liquid oxygen of main condenser evaporator is back to tower bottom liquid oxygen pond so that the liquid oxygen of main condenser evaporator
Certain circulating ratio is kept, carbon hydrocarbon compound concentration in main condenser evaporator is made to be maintained in safe range, ensures main condenser
The safety of evaporator.
5, Extra large air separation plant carries krypton xenon using liquid oxygen, and ice chest height is reasonable, and liquid air can smoothly enter into crude argon condensation
Device, air separation plant global reliability are high.
Description of the drawings
Fig. 1 is a kind of schematic device for extracting krypton and xenon from Extra large air separation plant of the present invention；
Fig. 2 is a kind of second of embodiment schematic diagram of device for extracting krypton and xenon from Extra large air separation plant of the present invention.
Specific implementation mode
With reference to specific embodiments and the drawings, the present invention is further illustrated.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Such as the first implementation that Fig. 1 is a kind of method and apparatus for extracting krypton and xenon from Extra large air separation plant of the present invention
Example, including：Lower tower C1, upper tower C2, main condenser evaporator K1, liquid oxygen elevator pump OP2, poor krypton xenon scrubbing tower C4, the concentration of poor krypton xenon
Tower C5 and poor krypton xenon evaporator K3, the bottoms lower tower C1 are connected with raw air inlet pipe A1, the raw air inlet pipe A1
It is connected with the import of poor krypton xenon evaporator K3 with branch, the tops lower tower C1 are provided with poor krypton xenon scrubbing tower C4, described
Main condenser evaporator K1, the main condenser evaporator K1 is provided in poor krypton xenon scrubbing tower C4 to be connected to by pipeline with lower tower C1,
At the top of the poor krypton xenon scrubbing tower C4 and tops poor krypton xenon concentration tower C5 after pipe influx with the bottoms upper tower C2 by being connected, institute
It states and is connected to respectively at the top of the poor krypton xenon concentration tower C5 and bottoms upper tower C2 by pipeline at the top of poor krypton xenon scrubbing tower C4, the upper tower
The bottoms C2 at the top of High Pressure Liquid Oxygen Pump OP1 and poor krypton xenon scrubbing tower C4 by being connected to, the poor outlets krypton xenon evaporator K3 and lower tower
The bottoms C1 are connected to after being collected by oxygen-enriched liquid pipe A2 with upper tower C2, have fixed gas outlet pipe A3 on the main condenser evaporator K1,
The bottoms poor krypton xenon evaporator K3 have poor krypton xenon outlet pipe A4, also have liquid oxygen product outlet pipe on the High Pressure Liquid Oxygen Pump OP1,
The liquid oxygen product outlet pipe is connected with subcooler, and the bottoms upper tower C2 have High Pressure Liquid Oxygen Pump OP1, the High Pressure Liquid Oxygen Pump
High pressure liquid oxygen outlet pipe is connected on OP1, the high pressure liquid oxygen outlet pipe is connect with heat exchanger, has argon purification on the outside of the upper tower C2
System, the argon purification system include：Crude argon column C3 and crude argon condenser K2, the upper tower C2 by pipeline and crude argon column C3 into
The two-way intercommunication of row, the top and bottom crude argon condenser K2 are connected to by pipeline with upper tower C2, and the subcooler passes through pipe
Road is connected with crude argon condenser K2, has crude argon outlet pipe on the crude argon condenser K2.
If Fig. 2 is a kind of second of embodiment of the device for extracting krypton and xenon from Extra large air separation plant of the present invention, one
Kind extracts the device of krypton and xenon from Extra large air separation plant, which is characterized in that including：Lower tower C1, upper tower C2, main condenser evaporation
Device K1, liquid oxygen elevator pump OP2, poor krypton xenon scrubbing tower C4, poor krypton xenon concentration tower C5 and poor krypton xenon evaporator K3, the bottoms lower tower C1
Portion is connected with raw air inlet pipe A1, and there is the raw air inlet pipe A1 branch to be connected with the import of poor krypton xenon evaporator K3
It connects, the tops lower tower C1 are provided with poor krypton xenon scrubbing tower C4, and main condenser evaporator is provided in the poor krypton xenon scrubbing tower C4
K1, the main condenser evaporator K1 are connected to lower tower C1 by pipeline, are concentrated with poor krypton xenon at the top of the poor krypton xenon scrubbing tower C4
By being connected with the bottoms upper tower C2 after pipe influx at the top of tower C5, at the top of the poor krypton xenon scrubbing tower C4 by pipeline respectively with
It is connected to the bottoms upper tower C2 at the top of poor krypton xenon concentration tower C5, the bottoms upper tower C2 are washed by High Pressure Liquid Oxygen Pump OP1 and poor krypton xenon
Connection at the top of tower C4 is washed, rear and upper tower C2 is collected in the poor outlets krypton xenon evaporator K3 and the lower bottoms tower C1 by oxygen-enriched liquid pipe A2
It is connected to, there is fixed gas outlet pipe A3, the bottoms poor krypton xenon evaporator K3 there is poor krypton xenon to go out on the main condenser evaporator K1
Also there is liquid oxygen product outlet pipe, the liquid oxygen product outlet pipe to be connected with subcooler, institute on pipe A4, the High Pressure Liquid Oxygen Pump OP1
The bottoms tower C2 are stated with being connected with high pressure liquid oxygen outlet pipe, the high pressure on High Pressure Liquid Oxygen Pump OP1, the High Pressure Liquid Oxygen Pump OP1
Liquid oxygen outlet pipe is connect with heat exchanger, includes with argon purification system, the argon purification system on the outside of the upper tower C2：Crude argon column C3
Two-way intercommunication is carried out by pipeline crude argon column C3 with crude argon condenser K2, the upper tower C2, at the top of the crude argon condenser K2 and
Bottom is connected to by pipeline with upper tower C2, and the subcooler is connected by pipeline with crude argon condenser K2, and the crude argon is cold
There is crude argon outlet pipe on condenser K2, also there is second level krypton xenon purification system, the second level krypton xenon purification system includes：Two level
Pass through pipeline and poor krypton xenon at the top of poor krypton xenon scrubbing tower C6 and two level poor krypton xenon evaporator K4, the poor krypton xenon scrubbing tower C6 of two level
Concentration tower C5 is connected, and is connected at the top of the poor krypton xenon outlet pipe A4 and the poor krypton xenon scrubbing tower C6 of two level, the poor krypton xenon of two level
Evaporator K4 imports are connected with raw air inlet pipe A1, and the poor outlets krypton xenon evaporator K4 of two level are connected with oxygen-enriched liquid pipe A2
It connects, the poor bottoms krypton xenon scrubbing tower C6 of two level have the poor krypton xenon outlet pipe A5 of two level.
A kind of extracting method of krypton and xenon, includes the following steps：
S1 raw airs A1 obtains oxygen-enriched liquid air after lower tower C1 rectifying；
S2, oxygen-enriched liquid air after depressurizing throttling by sending to crude argon column C3；
S3, oxygen-enriched liquid air obtain the higher liquid oxygen of xenon concentration containing krypton after upper tower C2 carries out rectifying；
S4, liquid oxygen are introduced into poor krypton xenon scrubbing tower C4 and carry out rectifying, are evaporated subsequently into main condenser K1；
S5, the liquid oxygen after main condenser K1 evaporations are sent into poor krypton xenon concentration tower C5 and poor krypton xenon evaporator K3 and are further evaporated；
S6, the fluid product containing krypton and xenon is obtained at the product end of poor krypton xenon concentration tower C5 and poor krypton xenon evaporator K3；
S7, the product that previous step obtains is further processed to the concentration of needs and state.
It is carried out with second level purification process after the step S6.
Heat source of the part of the raw air A1 as crude argon column C3.
The oxygen-enriched liquid air of the main condenser K1 is largely back to tower bottom, to make the liquid oxygen of main condenser evaporator protect
Hold certain circulating ratio.
The present invention the course of work be：Part liquid oxygen from the bottoms upper tower C2, after the OP2 pressurizations of liquid oxygen elevator pump,
Into poor krypton xenon scrubbing tower C4, after carrying out rectifying from the rising gas of main condenser evaporator K1, into main condenser evaporator K1,
Enter poor krypton xenon concentration tower C5 after being evaporated concentration, enters poor krypton xenon evaporator K3 after rectifying again, after being concentrated by evaporation again,
Obtain the product liquid containing krypton and xenon.The gas of main condenser evaporator K1 evaporations, ascends into poor krypton xenon scrubbing tower C4, with liquid
After oxygen carries out rectifying, into upper tower C2.The gas of poor krypton xenon evaporator K3 evaporations, ascends into poor krypton xenon concentration tower C5, with
After liquid oxygen carries out rectifying, enter upper tower (C2) after converging the gas from poor krypton xenon scrubbing tower C4.The heat of poor krypton xenon evaporator K3
Lower tower nitrogen or lower tower positive stream air can be used in source.
Embodiment 2 and the difference of the course of work of embodiment 1 are：Come from the liquid oxygen of main condenser evaporator K1, first
Into poor krypton xenon concentration tower C5, rectifying is carried out with the rising gas from krypton xenon evaporator K3, subsequently into krypton xenon evaporator K3, quilt
After evaporation and concentration, into the poor krypton xenon concentration tower C6 of two level, rectifying is carried out with the rising gas from two level krypton xenon evaporator K4, then
Into two level krypton xenon evaporator K4 the product liquid containing krypton and xenon is obtained after being concentrated by evaporation again.The poor krypton xenon evaporator of two level
The gas of K4 evaporations, ascends into the poor krypton xenon concentration tower C6 of two level, after carrying out rectifying with liquid oxygen, into the poor krypton xenon concentration of level-one
In tower C5；The gas of poor krypton xenon evaporator K3 evaporations, ascends into poor krypton xenon concentration tower C5, is concentrated with from the poor krypton xenon of two level
After the rising gas of tower C6 converges, rectifying is carried out with liquid oxygen, then converges the rising gas that poor krypton xenon scrubbing tower C4 comes, into upper tower
C2。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (9)
1. a kind of device extracting krypton and xenon from Extra large air separation plant, which is characterized in that including：Xia Ta, upper tower, main condenser
Evaporator, liquid oxygen elevator pump, poor krypton xenon scrubbing tower, poor krypton xenon concentration tower and poor krypton xenon evaporator, the lower tower bottom and raw material
Air inlet lines are connected, and there is the raw air inlet pipe branch to be connected with the import of poor krypton xenon evaporator, on the lower tower
Portion is provided with poor krypton xenon scrubbing tower, is provided with main condenser evaporator in the poor krypton xenon scrubbing tower, the main condenser evaporator and
Lower tower is connected to by pipeline, at the top of the poor krypton xenon scrubbing tower and poor krypton xenon concentration tower top by after pipe influx with upper bottom of tower
Portion is connected, and is connected to respectively with upper tower bottom at the top of poor krypton xenon concentration tower by pipeline at the top of the poor krypton xenon scrubbing tower, institute
It states tower bottom to be connected to by High Pressure Liquid Oxygen Pump and poor krypton xenon scrubbing tower top, the poor krypton xenon evaporator outlet and lower tower bottom
By being connected to upper tower after oxygen-rich liquid manifold collection, there is fixed gas outlet pipe, the poor krypton xenon evaporation on the main condenser evaporator
Device bottom has poor krypton xenon outlet pipe.
2. a kind of device extracting krypton and xenon from Extra large air separation plant according to claim 1, it is characterised in that：Institute
Stating, also there is liquid oxygen product outlet pipe, the liquid oxygen product outlet pipe to be connected with subcooler in High Pressure Liquid Oxygen Pump.
3. a kind of device extracting krypton and xenon from Extra large air separation plant according to claim 1, it is characterised in that：Institute
Stating tower bottom has High Pressure Liquid Oxygen Pump, and high pressure liquid oxygen outlet pipe, the high pressure liquid oxygen outlet pipe are connected in the High Pressure Liquid Oxygen Pump
It is connect with heat exchanger.
4. a kind of device extracting krypton and xenon from Extra large air separation plant according to claim 2, it is characterised in that：Institute
It states on the outside of tower and includes with argon purification system, the argon purification system：Crude argon column and crude argon condenser, the upper tower pass through pipe
Road crude argon column carries out two-way intercommunication, is connected to upper tower by pipeline at the top and bottom of the crude argon condenser, the subcooler
It is connected with crude argon condenser by pipeline, there is crude argon outlet pipe on the crude argon condenser.
5. a kind of device extracting krypton and xenon from Extra large air separation plant according to one of claim 1-4, feature
It is：Also there is second level krypton xenon purification system, the second level krypton xenon purification system includes：The poor krypton xenon scrubbing tower of two level and two
The poor krypton xenon evaporator of grade, the poor krypton xenon scrubbing tower top of two level are connected by pipeline with poor krypton xenon concentration tower, the poor krypton
It is connected at the top of xenon outlet pipe and the poor krypton xenon scrubbing tower of two level, the poor krypton xenon evaporator of two level is connected with raw air inlet pipe
Logical, the poor krypton xenon evaporator outlet of two level is connected with oxygen-enriched liquid pipe, and the poor krypton xenon wash tower bottoms of two level have two level
Poor krypton xenon outlet pipe.
6. the extracting method of a kind of krypton and xenon, which is characterized in that include the following steps：
S1, raw air obtain oxygen-enriched liquid air after lower tower rectifying；
S2, oxygen-enriched liquid air after depressurizing throttling by sending to condenser of crude argon tower；
S3, the oxygen-enriched liquid air after upper tower carries out rectifying, obtain the higher liquid oxygen of xenon concentration containing krypton；
S4, liquid oxygen are introduced into poor krypton xenon scrubbing tower C4 and carry out rectifying, are evaporated subsequently into main condenser K1；
S5, the liquid oxygen after the evaporation of main condenser is sent into poor krypton xenon concentration tower and poor krypton xenon evaporator further evaporates；
S6, the fluid product containing krypton and xenon is obtained at the product end of poor krypton xenon concentration tower and poor krypton xenon evaporator；
S7, the product that previous step obtains is further processed to the concentration of needs and state.
7. the extracting method of a kind of krypton and xenon according to claim 6, it is characterised in that：Had after the step S6
There is second level purification process.
8. the extracting method of a kind of krypton and xenon according to claim 7, it is characterised in that：Make the part of the raw air
For the heat source of crude argon column.
9. the extracting method of a kind of krypton and xenon according to claim 8, it is characterised in that：The big portion of liquid oxygen of the main condenser
Divide and is back to tower bottom, the circulating ratio to make the liquid oxygen of main condenser evaporator keep certain.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810249809.6A CN108362074B (en) | 2018-03-26 | 2018-03-26 | Method and device for extracting krypton and xenon from oversized air separation equipment |
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| CN201810249809.6A CN108362074B (en) | 2018-03-26 | 2018-03-26 | Method and device for extracting krypton and xenon from oversized air separation equipment |
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| CN108362074B CN108362074B (en) | 2023-11-24 |
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| CN114353434A (en) * | 2022-03-17 | 2022-04-15 | 杭州制氧机集团股份有限公司 | Device and method for concentrating krypton and xenon through low-temperature rectification |
| CN115839601A (en) * | 2023-02-27 | 2023-03-24 | 中科富海(杭州)气体工程科技有限公司 | Liquid air separation and krypton-xenon preconcentration integrated equipment |
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| CN108362074B (en) | 2023-11-24 |
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