CN201173660Y - Middle and small sized multi- behavior energy-saving -type air separation equipment - Google Patents

Middle and small sized multi- behavior energy-saving -type air separation equipment Download PDF

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Publication number
CN201173660Y
CN201173660Y CNU200820084257XU CN200820084257U CN201173660Y CN 201173660 Y CN201173660 Y CN 201173660Y CN U200820084257X U CNU200820084257X U CN U200820084257XU CN 200820084257 U CN200820084257 U CN 200820084257U CN 201173660 Y CN201173660 Y CN 201173660Y
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China
Prior art keywords
air
separation plant
air separation
compressor
valve
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Expired - Lifetime
Application number
CNU200820084257XU
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Chinese (zh)
Inventor
葛水福
葛浩华
葛浩俊
马金亮
许立国
向云华
蒋吉林
黄孝文
田曙光
陈海大
任智军
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Hangzhou Fortune Cryogenic Equipment Co ltd
Hangzhou Fortune Industry Group Co.,Ltd.
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HANGZHOU FUSIDA GAS EQUIPMENT CO Ltd
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Priority to CNU200820084257XU priority Critical patent/CN201173660Y/en
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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
    • F25J3/04157—Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line
    • 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
    • F25J3/04303—Lachmann expansion, i.e. expanded into oxygen producing or low 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
    • F25J3/04248—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.
    • F25J3/04393—Details relating to the work expansion, e.g. process parameter etc. using multiple or multistage gas work expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
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    • F25J3/04642—Recovering noble gases from air
    • F25J3/04648—Recovering noble gases from air argon
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    • 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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    • 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
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    • 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
    • F25J3/04703—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 being arranged in more than one vessel
    • 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
    • F25J3/04709—Producing crude argon in a crude argon column as an auxiliary column system in at least a dual pressure main column system
    • F25J3/04715—The auxiliary column system simultaneously produces oxygen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
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    • 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
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    • F25J3/04721—Producing pure argon, e.g. recovered from a crude argon column
    • F25J3/04727—Producing pure argon, e.g. recovered from a crude argon column using an auxiliary pure argon column for nitrogen rejection
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    • 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
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    • 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
    • F25J3/04775—Air purification and pre-cooling
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    • 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
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    • F25J3/04781—Pressure changing devices, e.g. for compression, expansion, liquid pumping
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    • F25J3/04763—Start-up or control of the process; Details of the apparatus used
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    • F25J3/04787—Heat exchange, e.g. main heat exchange line; Subcooler, external reboiler-condenser
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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
    • F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • F25J3/04957—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipments upstream of the fractionation unit (s), i.e. at the "front-end"
    • 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
    • F25J3/04951—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network
    • F25J3/04963—Arrangements of multiple air fractionation units or multiple equipments fulfilling the same process step, e.g. multiple trains in a network and inter-connecting equipment within or downstream of the fractionation unit(s)
    • 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
    • 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
    • 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/32—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as direct contact cooling tower to produce a cooled gas stream, e.g. direct contact after cooler [DCAC]
    • 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
    • F25J2205/00—Processes or apparatus using other separation and/or other processing means
    • F25J2205/30—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes
    • F25J2205/34—Processes or apparatus using other separation and/or other processing means using a washing, e.g. "scrubbing" or bubble column for purification purposes as evaporative cooling tower to produce chilled water, e.g. evaporative water chiller [EWC]
    • 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
    • F25J2215/56—Ultra high purity oxygen, i.e. generally more than 99,9% 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/24—Multiple compressors or compressor stages in parallel
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/40—Processes or apparatus involving steps for increasing the pressure of gaseous process streams the fluid being 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
    • F25J2235/00—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams
    • F25J2235/58—Processes or apparatus involving steps for increasing the pressure or for conveying of liquid process streams the fluid being argon or crude argon
    • 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
    • F25J2240/02—Expansion of a process fluid in a work-extracting turbine (i.e. isentropic expansion), e.g. of the feed stream
    • F25J2240/04—Multiple expansion turbines in parallel
    • 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
    • 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
    • F25J2280/00—Control of the process or apparatus
    • F25J2280/02—Control in general, load changes, different modes ("runs"), measurements

Landscapes

  • 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 gas separating device, in particular to an air separating device which comprises an air filter, an air compressor, an air precooling system, an air purifier, an fractionating column system, a booster expansion turbine, an oxygen compressor, an instrument control system and an electric control system; all of the systems are connected through a pipeline and a valve by adopting a flange and a welding structure to form a set of complete air separating device. The air separating device adopts the advanced technology of molecular sieve normal-temperature absorption, booster expansion turbine expanding refrigeration, regular stuffing upper column, etc, so the air separating device has the advantages of good purifying effect, high refrigerating efficiency, small upper column resistance, high oxygen extracting efficiency, etc., simultaneously, since the technology of varying duty is adopted, the elasticity of the operation is great, the alteration range of the output is large, not only the requirement for the oxygen of users under different working conditions is met, but also the purpose for saving the energy is achieved.

Description

A kind of middle-size and small-size multi-operating mode energy-saving type air separation plant
Technical field
The utility model relates to a kind of gas separation equipment, especially a kind of air separation equipment.
Background technology
Middle-size and small-size air separation equipment is divided into two kinds of high and medium voltages by the operating pressure grade, does not have low-pressure air separation plants, and high pressure is 10～15MPa, and middle pressure is 3～4MPa in the past.High pressure, middle pressure air separation plant energy consumption height, the power consumption of producing every cubic metre of oxygen is 1.2～1.4 degree electricity, and high pressure, middle pressure air separation plant because pressure height, processing safety are poor device damage often take place, life casualty accident, operating maintenance difficulty are big, the manufacturing cost height.
Begin to develop low-pressure air separation plants from the nineties, operating pressure is about 1～1.5MPa, unit oxygen energy consumption is at 0.8～1.0 degree, the air separation plant energy consumption decreases, processing safety also has improvement greatly, and shortcoming is single operating mode to operate, and the oxygen-producing amount adjustable range is between 95%～105%, therefore there is the problem of being forced to emptying when have more than is needed from start to finish in each user, causes the energy to waste greatly.
Summary of the invention
Thereby the purpose of this utility model is in order to provide a kind of can carry out variable working condition production and realize that user's gas consumption is unbalanced with a kind of equipment the time, to reduce the middle-size and small-size multi-operating mode energy-saving type air separation plant of emptying loss.
For realizing the purpose of this utility model, this specification provides a kind of middle-size and small-size multi-operating mode energy-saving type air separation plant, comprises air cleaner, air compressor, air precooling system, air purge device, fractionating column system, booster expansion turbine, oxygen compressor, instrument control system, electric-control system; Each system adopts flange or Welding Structure to be linked together successively by pipeline, valve, forms the complete air separation plant of a cover.
Air cleaner is a self-cleaning air filter, the pulse jet type parts that its ash-clearing structure parts are movement-less part.Air compressor is a centrifugal air compressor.
Air precooling system comprises semi-hermetic piston-type refrigeration compressor, condenser, evaporimeter, and hot gas bypass valve successively by pipeline, valve, adopts flange or welding to be linked together the formation air precooling system.
The air purge device comprises absorbing cylinder, electric heater, vent muffler, instrument, electric-control system, successively by pipeline, valve, adopts flange or Welding Structure to be linked together, and forms air cleaning system.。
Fractionating column ice chest system comprises tower, main heat exchanger, subcooler, condenser/evaporator, crude argon column, crude argon condenser, pure argon column, pure argon evaporator, pure argon condenser, circulation liquid argon pump up and down, successively by pipeline, valve, adopt flange or Welding Structure to combine by flow chart, be contained in cold insulated cabinet, form the fractionating column system.
Booster expansion turbine directly is contained in the ice chest; Or be contained in the independent little ice chest, be connected with ice chest by the gap bridge that is incubated.
The middle-size and small-size multi-operating mode energy-saving type air separation plant that the utility model provides has adopted the absorption of molecular sieve normal temperature, the booster expansion turbine swell refrigeration, advanced technology such as tower makes equipment have good purification, the refrigerating efficiency height in the structured packing, last tower resistance is little, the oxygen extraction ratio advantages of higher.Simultaneously, owing to adopt the variable working condition technology to make operating flexibility big, the harvest fluctuation amplitude is big, has both satisfied the oxygen demand of use under user's the different operating modes, and the while is can reach purpose of energy saving.
Description of drawings
Fig. 1～9th, process principle figure of the present utility model.
The specific embodiment
The purpose of this utility model, feature and advantage will be in conjunction with the embodiments, are further described with reference to accompanying drawing.To help to understand the utility model by embodiment, but not limit content of the present utility model.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.
Embodiment 1: this middle-size and small-size multi-operating mode energy-saving type air separation plant comprises air cleaner, air compressor, air precooling system, air purge device, fractionating column system, booster expansion turbine, oxygen compressor, instrument control system, electric-control system; Each system adopts flange or Welding Structure to be linked together successively by pipeline, valve, forms the complete air separation plant of a cover.
Air cleaner is a self-cleaning air filter, the pulse jet type parts that its ash-clearing structure parts are movement-less part.Air compressor is a centrifugal air compressor.
Air precooling system comprises semi-hermetic piston-type refrigeration compressor, condenser, evaporimeter, and hot gas bypass valve successively by pipeline, valve, adopts flange or welding to be linked together the formation air precooling system.
The air purge device comprises absorbing cylinder, electric heater, vent muffler, instrument, electric-control system, successively by pipeline, valve, adopts flange or Welding Structure to be linked together, and forms air cleaning system.。
Fractionating column ice chest system comprises tower, main heat exchanger, subcooler, condenser/evaporator, crude argon column, crude argon condenser, pure argon column, pure argon evaporator, pure argon condenser, circulation liquid argon pump up and down, successively by pipeline, valve, adopt flange or Welding Structure to combine by flow chart, be contained in cold insulated cabinet, form the fractionating column system.
Booster expansion turbine directly is contained in the ice chest; Or be contained in the independent little ice chest, be connected with ice chest by the gap bridge that is incubated.
Brief description of the process of the present utility model is as follows:
Air enters air compressor after air cleaner filters out dust and mechanical admixture, enter air precooling system after compression and the cooling.The air cooling that in the evaporimeter of the precooling unit of air precooling system, is cooled, part moisture content condensation is simultaneously got off, the air that goes out evaporimeter enters removes in the separator that free moisture content is laggard goes into sieve purification system (sieve purification system is made up of two purifiers, two electric heaters, two purifiers switch use, when a job, another dirty nitrogen by fractionating column enters follow-up system through the electric heater thermal regeneration after the agent of the absorbing cylinder of purified devices such as airborne moisture content, the carbon dioxide absorption).
From purifying air that purifier comes out, major part enters main heat exchanger and enters Xia Ta with the temperature that the gas converting heat that backflows is cooled near liquefaction, the remainder air enters the booster expansion machine pressurized end, enter the supercharger aftercooler after the merit that the absorption decompressor discharges is pressurized and enter main heat exchanger to normal temperature, after being cooled to uniform temperature, be sent to decompressor, through swell refrigeration, major part enters tower and participates in smart gold-plating, and remainder enters dirty nitrogen pipe cooling box after the main heat exchanger re-heat.
Air obtains oxygen-enriched liquid air, liquid nitrogen, liquid air and liquid nitrogen respectively from following tower bottom and condenser/evaporator through smart gold-plating in the following tower, is cooled off cold by the dirty nitrogen, the nitrogen that come from last tower.Oxygen-enriched liquid air is extracted out from subcooler, and major part enters crude argon condenser and makes low-temperature receiver, and remainder enters tower and participates in smart gold-plating, enters Shang Ta after entering the liquid air vaporization of crude argon condenser, and liquid nitrogen participates in smart gold-plating from entering tower after subcooler is extracted throttling out.In last tower, through smart gold-plating respectively condenser/evaporator bottom, on tower bottom and top obtain liquid oxygen, oxygen, dirty nitrogen and nitrogen.
Oxygen is extracted out from last tower bottom and is entered the main heat exchanger re-heat to normal temperature cooling box deoxidation air compressor.
Liquid oxygen is extracted out from condenser/evaporator, sends ice chest and enters user's storage tank.
Dirty nitrogen is extracted out from last tower top and is entered subcooler, and heat exchange is laggard goes into main heat exchanger, enters sieve purification system after the part re-heat, as regenerating molecular sieve gas.
Nitrogen is extracted out from last top of tower and is entered subcooler, and heat exchange is laggard goes into main heat exchanger, uses for the user after the re-heat.
From last tower bottom, extract argon gold-plating part gas and enter crude argon column I, with from crude argon column II behind the thick liquid argon heat and mass that circulation liquid argon pump transports, enter crude argon column II, crude argon column II low-temperature receiver is for crossing the liquid air after cold through subcooler, in crude argon column II, argon gold-plating part gas is behind heat and mass, slough the oxygen component, enter pure argon column then, pure argon column top and bottom are provided with condenser and evaporimeter respectively, and cold and heat source is respectively liquid nitrogen and nitrogen, crude argon through smart gold-plating, obtains liquid straight argon in the pure argon condenser bottom in pure argon column.

Claims (7)

1, a kind of middle-size and small-size multi-operating mode energy-saving type air separation plant is characterized in that: comprise air cleaner, air compressor, air precooling system, air purge device, fractionating column system, booster expansion turbine, oxygen compressor, instrument control system, electric-control system; Each system adopts flange or Welding Structure to be linked together successively by pipeline, valve, forms the complete air separation plant of a cover.
2, air separation plant according to claim 1 is characterized in that: described air cleaner is a self-cleaning air filter, the pulse jet type parts that its ash-clearing structure parts are movement-less part.
3, air separation plant according to claim 1 is characterized in that: described air compressor is a centrifugal air compressor.
4, air separation plant according to claim 1, it is characterized in that: described air precooling system comprises semi-hermetic piston-type refrigeration compressor, condenser, evaporimeter, hot gas bypass valve successively by pipeline, valve, adopts flange or welding to be linked together the formation air precooling system.
5, air separation plant according to claim 1, it is characterized in that: described air purge device comprises absorbing cylinder, electric heater, vent muffler, instrument, electric-control system, by pipeline, valve, adopt flange or Welding Structure to be linked together successively, form air cleaning system.。
6, air separation plant according to claim 1, it is characterized in that: described fractionating column ice chest system comprises tower, main heat exchanger, subcooler, condenser/evaporator, crude argon column, crude argon condenser, pure argon column, pure argon evaporator, pure argon condenser, circulation liquid argon pump up and down, successively by pipeline, valve, adopt flange or Welding Structure to combine by flow chart, be contained in cold insulated cabinet, form the fractionating column system.
7, air separation plant according to claim 1 is characterized in that: described booster expansion turbine directly is contained in the ice chest; Or be contained in the independent little ice chest, be connected with ice chest by the gap bridge that is incubated.
CNU200820084257XU 2008-03-12 2008-03-12 Middle and small sized multi- behavior energy-saving -type air separation equipment Expired - Lifetime CN201173660Y (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767542A (en) * 2012-07-23 2012-11-07 江苏申久化纤有限公司 High-air-capacity centrifugal air compressor
CN104208980A (en) * 2014-08-22 2014-12-17 中国华能集团清洁能源技术研究院有限公司 Turning wheel air separation purification device and turning wheel air separation purification method
CN106744697A (en) * 2017-01-17 2017-05-31 孔祥旭 A kind of super energy-conservation making oxygen by air separation device
EP3438586A1 (en) * 2017-08-03 2019-02-06 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device for air separation by cryogenic distilling
FR3069914A1 (en) * 2017-08-03 2019-02-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude APPARATUS AND METHOD FOR AIR SEPARATION BY CRYOGENIC DISTILLATION
FR3069915A1 (en) * 2017-08-03 2019-02-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude APPARATUS AND METHOD FOR AIR SEPARATION BY CRYOGENIC DISTILLATION
WO2021204424A3 (en) * 2020-04-09 2021-12-02 Linde Gmbh Process for cryogenic fractionation of air, air fractionation plant and integrated system composed of at least two air fractionation plants
FR3118145A1 (en) * 2020-12-23 2022-06-24 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for restarting an air separation device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102767542A (en) * 2012-07-23 2012-11-07 江苏申久化纤有限公司 High-air-capacity centrifugal air compressor
CN104208980A (en) * 2014-08-22 2014-12-17 中国华能集团清洁能源技术研究院有限公司 Turning wheel air separation purification device and turning wheel air separation purification method
CN106744697A (en) * 2017-01-17 2017-05-31 孔祥旭 A kind of super energy-conservation making oxygen by air separation device
EP3438586A1 (en) * 2017-08-03 2019-02-06 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device for air separation by cryogenic distilling
EP3438584A1 (en) * 2017-08-03 2019-02-06 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device for air separation by cryogenic distilling
FR3069914A1 (en) * 2017-08-03 2019-02-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude APPARATUS AND METHOD FOR AIR SEPARATION BY CRYOGENIC DISTILLATION
FR3069915A1 (en) * 2017-08-03 2019-02-08 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude APPARATUS AND METHOD FOR AIR SEPARATION BY CRYOGENIC DISTILLATION
US10794630B2 (en) 2017-08-03 2020-10-06 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method and device for separating air by cryogenic distillation
US10866024B2 (en) 2017-08-03 2020-12-15 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Device and method for separating air by cryogenic distillation
WO2021204424A3 (en) * 2020-04-09 2021-12-02 Linde Gmbh Process for cryogenic fractionation of air, air fractionation plant and integrated system composed of at least two air fractionation plants
FR3118145A1 (en) * 2020-12-23 2022-06-24 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for restarting an air separation device
WO2022136088A1 (en) * 2020-12-23 2022-06-30 L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for restarting an air separation unit

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