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CN106225424A - The air separation unit that a kind of product oxygen pump and circulation oxygen pump share - Google Patents

The air separation unit that a kind of product oxygen pump and circulation oxygen pump share Download PDF

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Publication number
CN106225424A
CN106225424A CN201610691857.1A CN201610691857A CN106225424A CN 106225424 A CN106225424 A CN 106225424A CN 201610691857 A CN201610691857 A CN 201610691857A CN 106225424 A CN106225424 A CN 106225424A
Authority
CN
China
Prior art keywords
oxygen pump
tower
oxygen
product
heat exchange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610691857.1A
Other languages
Chinese (zh)
Inventor
蒋波
蒋一波
徐小芹
杨荣
孙旭阳
曹徽
韦霆
徐前进
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Zhihai Chemical Equipment Engineering Co Ltd
Original Assignee
Zhejiang Zhihai Chemical Equipment Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Zhihai Chemical Equipment Engineering Co Ltd filed Critical Zhejiang Zhihai Chemical Equipment Engineering Co Ltd
Priority to CN201610691857.1A priority Critical patent/CN106225424A/en
Publication of CN106225424A publication Critical patent/CN106225424A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F25J3/04048—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams
    • F25J3/04054—Providing pressurised feed air or process streams within or from the air fractionation unit by compression of cold gaseous streams, e.g. intermediate or oxygen enriched (waste) streams of air
    • 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
    • F25J3/04406—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
    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04787—Heat exchange, e.g. main heat exchange line; Subcooler, external reboiler-condenser
    • 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
    • F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
    • F25J3/04793—Rectification, e.g. columns; Reboiler-condenser
    • 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
    • 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
    • F25J2200/04—Processes or apparatus using separation by rectification in a dual pressure main column system
    • F25J2200/06—Processes or apparatus using separation by rectification in a dual pressure main column system in a classical double column flow-sheet, 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/40—Air or oxygen enriched air, i.e. generally less than 30mol% of 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
    • 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
    • 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
    • F25J2235/02—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams using a pump in general or hydrostatic pressure increase
    • 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
    • F25J2240/00—Processes or apparatus involving steps for expanding of process streams
    • F25J2240/40—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval
    • F25J2240/46—Expansion without extracting work, i.e. isenthalpic throttling, e.g. JT valve, regulating valve or venturi, or isentropic nozzle, e.g. Laval the fluid being 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
    • 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

Landscapes

  • 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 air separation unit that a kind of product oxygen pump and circulation oxygen pump share, its key equipment includes: main heat exchanger, product oxygen pump, by the cold rectifying column formed of master of Shang Ta, lower tower and centre, and the closing thermal insulation ice chest filled with pearlife of these equipment is installed, described upper tower bottom is provided with liquid oxygen outlet port, this liquid oxygen outlet port pipe is connected to product oxygen pump, two-way has been picked out after this product oxygen pump, one tunnel connects main heat exchanger, by carrying out the liquid oxygen re-heat heat exchange runner of heat exchange with the pressure-air heat exchange runner just flowed, and pick out ice chest；Described adjacent pressure-air heat exchange runner is connected to lower tower after main heat exchanger picks out；Separately lead up to be connected to after choke valve main cold, as the lower tower nitrogen of low-temperature receiver condensation and make liquid oxygen connect upper tower after flashing to oxygen；Product oxygen pump and circulation oxygen pump are mainly shared by the present invention, i.e. use a product oxygen pump, both can guarantee that the needs of oxygen were produced in intrinsic pressure contracting, and can substitute again the function of circulation oxygen pump, reach Simplified flowsheet, reduce the purpose of equipment investment.

Description

The air separation unit that a kind of product oxygen pump and circulation oxygen pump share
Technical field
The present invention relates to a kind of product oxygen pump and circulate the air separation unit that oxygen pump shares, especially one cryopump Compression liquid oxygen laggard main heat exchanger heat exchange produces the air separation unit of oxygen, it is adaptable to interior compression process, belongs to cryogenic air separation technology Field.
Background technology
Existing liquid oxygen internal compression is as it is shown in figure 1, the equipment related generally to has: main heat exchanger 1, flow process oxygen pump 2, master Tower, king-tower contains: lower tower 3, main cold 4, upper tower 5.Main heat exchanger 1 effect is: after just flowing pressure-air and low temperature supercharging, liquid oxygen changes Heat, makes liquid oxygen gasification become oxygen product to extract ice chest 6 out, is just flowing air cooling-down and is becoming low temperature liquid air to enter lower tower 3.Flow process oxygen pump is made With: liquid oxygen is sucked from main cold 4, after supercharging, sends into main heat exchanger 1.King-tower effect: separated by cryogenic rectification and produce oxygen, nitrogen produces Product, produce nitrogen at lower tower 3 top, produce liquid oxygen bottom lower tower 3.The effect of main cold 4 is: bottom above tower 3, liquid oxygen is as cold Lower tower 3 top nitrogen is condensed into liquid nitrogen by case 6, and the backflow as lower tower 3 refluxes.Above-mentioned all devices is cryogenic equipment, peace It is contained in the ice chest 6 adiabatic by pearlife cold insulation of closing.
Under normal circumstances, lower tower 3, main cold 4, upper tower 5 can be assembled together as an overall tower, but at some In the case of, in order to reduce ice chest height, king-tower can be divided into two parts, lower tower 3 and main cold 4 one tower of composition, upper tower 5 is single An only tower, two towers land simultaneously and are arranged in ice chest 6.By previously described, lower tower 3 nitrogen needs tower 5 to produce Liquid oxygen condense as backflow as low-temperature receiver, so after king-tower is divided into two towers, need the liquid oxygen bottom upper tower 5 Send into main cold 4.Due to the restriction of flow scheme design pressure, the pressure bottom lower tower 3 is the same with main cold 4 liquid oxygen cavity pressures, institute Liquid head cannot be overcome to send into by pressure itself with liquid oxygen main cold, so needing liquid pump to pressurize, master is cold, the most generally for feeding In the case of can increase circulation oxygen pump.
Above-mentioned king-tower is divided into the schematic flow sheet of two sections, sees Fig. 2.Knowable to the contrast of Fig. 2 and Fig. 1, owing to king-tower divides Becoming two towers, whole requirements of process increases circulation oxygen pump 7 equipment, and increases corresponding pipeline and valve, thus, add The complexity of whole technological process and the investment adding equipment.So, in the technological process shown in Fig. 2, the most both King-tower segmentation to be accomplished, to reduce the purpose of ice chest height, can accomplish again not increase the investment of extra circulation oxygen pump？It is me Need thinking key issue.
Summary of the invention
It is an object of the invention to the deficiency overcoming prior art to exist, and a kind of energy Simplified flowsheet, saving equipment are provided The air separation unit that the product oxygen pump of investment and circulation oxygen pump share.
The present invention purpose complete by following technical solution: a kind of product oxygen pump and circulation oxygen pump share Air separation unit, its key equipment includes: main heat exchanger, product oxygen pump, by the cold rectification formed of master of Shang Ta, lower tower and centre Tower, and the closing thermal insulation ice chest filled with pearlife of these equipment is installed, described upper tower bottom is provided with liquid oxygen and extracts out Mouthful, this liquid oxygen outlet port pipe is connected to product oxygen pump, has picked out two-way after this product oxygen pump, and a road connects main heat exchanger, By carrying out the liquid oxygen re-heat heat exchange runner of heat exchange with the pressure-air heat exchange runner just flowed, and pick out ice chest；Described adjacent Pressure-air heat exchange runner after main heat exchanger picks out, be connected to lower tower；Separately lead up to and be connected to after choke valve main cold, make Condense lower tower nitrogen for low-temperature receiver and make liquid oxygen connect upper tower after flashing to oxygen.
As preferably: described lower tower and main one tower of cold composition, upper tower is a single tower, described ice chest It is welded by steel construction and panel, is filled with in ice chest for preventing equipment from running the pearlife of cold thermal insulation.
Product oxygen pump and circulation oxygen pump are mainly shared by the present invention, i.e. use a product oxygen pump, both can guarantee that intrinsic pressure contracting Produce the needs of oxygen, the function of circulation oxygen pump can be substituted again, reached Simplified flowsheet, reduce the purpose of equipment investment.
Accompanying drawing explanation
Fig. 1 is that oxygen schematic diagram is produced in existing interior compression.
Fig. 2 is existing product oxygen pump and circulates the interior compression product oxygen schematic diagram that oxygen pump independently uses.
Fig. 3 is product oxygen pump of the present invention and circulates the interior compression product oxygen schematic diagram that oxygen pump shares.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention will be described in detail: shown in Fig. 3, and a kind of product oxygen pump and circulation oxygen pump share Air separation unit, its key equipment includes: main heat exchanger 11, product oxygen pump 12, cold by the master of upper tower 13, lower tower 14 and centre The rectifying column of 15 compositions, and the closing thermal insulation ice chest 16 filled with pearlife of these equipment is installed, bottom described upper tower 3 Being provided with liquid oxygen outlet port 17, this liquid oxygen outlet port 7 pipe is connected to product oxygen pump 12, has picked out two after this product oxygen pump 12 Road, a road 18 connects main heat exchanger 11, by carrying out the liquid oxygen re-heat heat exchange of heat exchange with the pressure-air heat exchange runner 19 just flowed Runner 20, and pick out ice chest 16；Described adjacent pressure-air heat exchange runner 19 is connected to after main heat exchanger 11 picks out Tower 14；Another road 21, by being connected to main cold 15 after choke valve 22, condenses lower tower nitrogen as low-temperature receiver and makes liquid oxygen flash to oxygen Tower 13 it is connected in succession by pipe after gas.
Shown in figure, described lower tower 14 and main cold 15 one tower of composition, upper tower 13 is a single tower, described Ice chest 16 be welded by steel construction and panel, be filled with in ice chest 16 for prevent equipment run cold thermal insulation pearlife.
Embodiment: oxygen is produced in the interior compression that a kind of product oxygen pump of the present invention and circulation oxygen pump share, and it is crucial Equipment includes: main heat exchanger 11, product oxygen pump 12, lower tower 14, main cold 15, upper tower 13, all of equipment is cryogenic equipment, installs In the ice chest 16 closed by steel construction and panel, ice chest 16 prevents from running cold thermal insulation built with pearlife.Main flow is summarized: liquid Oxygen is extracted out bottom upper tower 13, sends into product oxygen pump 12, is divided into two-way after product oxygen pump supercharging, and main heat exchanger 1 is sent on a road With the pressure-air heat exchange just flowed, after re-heat to room temperature, extract ice chest 16 out, just flowing after pressure-air cooling is liquefied as liquid air and sending into Lower tower；Choke valve 23 of separately leading up to is sent into main cold 15 and is flashed to feeding after oxygen as lower tower 14 nitrogen of low-temperature receiver condensation, liquid oxygen Upper tower 13.
The effect of the present invention, makes product oxygen pump and circulation oxygen pump share, both ensure that product oxygen by product oxygen pump Output, shunts at product oxygen pump discharge again, is sent into by liquid oxygen main cold, thus reached two can not the sharing, significantly of function pump Simplify technological process, save the investment of cryogenic oxygen pump.

Claims (2)

1. product oxygen pump and circulation oxygen pump share an air separation unit, its key equipment includes: main heat exchanger, product oxygen pump, By the cold rectifying column formed of the master of Shang Ta, lower tower and centre, and the closing with pearlife filling installing these equipment is exhausted Hot ice chest, it is characterised in that described upper tower bottom is provided with liquid oxygen outlet port, this liquid oxygen outlet port pipe is connected to product oxygen pump, Having picked out two-way after this product oxygen pump, a road connects main heat exchanger, by carrying out with the pressure-air heat exchange runner just flowed The liquid oxygen re-heat heat exchange runner of heat exchange, and pick out ice chest；Described adjacent pressure-air heat exchange runner picks out from main heat exchanger After be connected to lower tower；Separately lead up to be connected to after choke valve main cold, as the lower tower nitrogen of low-temperature receiver condensation and make liquid oxygen flash to Upper tower is connected after oxygen.
The air separation unit that product oxygen pump the most according to claim 1 and circulation oxygen pump share, it is characterised in that under described Tower and main one tower of cold composition, upper tower is a single tower, and described ice chest is welded by steel construction and panel, cold It is filled with in case for preventing equipment from running the pearlife of cold thermal insulation.
CN201610691857.1A 2016-08-19 2016-08-19 The air separation unit that a kind of product oxygen pump and circulation oxygen pump share Pending CN106225424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610691857.1A CN106225424A (en) 2016-08-19 2016-08-19 The air separation unit that a kind of product oxygen pump and circulation oxygen pump share

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610691857.1A CN106225424A (en) 2016-08-19 2016-08-19 The air separation unit that a kind of product oxygen pump and circulation oxygen pump share

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1277347A (en) * 1999-05-07 2000-12-20 英国氧气集团有限公司 Separation of air
CN102230716A (en) * 2011-06-08 2011-11-02 杭州优埃基空分设备有限公司 Method and device for separating air through air pressurization, backflow expansion and internal compression
CN103712417A (en) * 2013-12-30 2014-04-09 上海启元空分技术发展股份有限公司 Method and device for separating air through steps of air pressurizing, reflux expansion and internal compression
JP2016075409A (en) * 2014-10-03 2016-05-12 神鋼エア・ウォーター・クライオプラント株式会社 Air separation plant
CN205373261U (en) * 2015-12-29 2016-07-06 中国空分设备有限公司 Low positive pressure of low high extraction percentage of liquid flows large -scale interior compression air separation system of inflation
CN206019155U (en) * 2016-08-19 2017-03-15 浙江智海化工设备工程有限公司 The air separation unit that product oxygen pump and circulation oxygen pump are shared

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1277347A (en) * 1999-05-07 2000-12-20 英国氧气集团有限公司 Separation of air
CN102230716A (en) * 2011-06-08 2011-11-02 杭州优埃基空分设备有限公司 Method and device for separating air through air pressurization, backflow expansion and internal compression
CN103712417A (en) * 2013-12-30 2014-04-09 上海启元空分技术发展股份有限公司 Method and device for separating air through steps of air pressurizing, reflux expansion and internal compression
JP2016075409A (en) * 2014-10-03 2016-05-12 神鋼エア・ウォーター・クライオプラント株式会社 Air separation plant
CN205373261U (en) * 2015-12-29 2016-07-06 中国空分设备有限公司 Low positive pressure of low high extraction percentage of liquid flows large -scale interior compression air separation system of inflation
CN206019155U (en) * 2016-08-19 2017-03-15 浙江智海化工设备工程有限公司 The air separation unit that product oxygen pump and circulation oxygen pump are shared

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Application publication date: 20161214