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EP3006875A1 - Procédé de réglage d'un système d'échangeur thermique couplé et système d'échangeur thermique - Google Patents

Procédé de réglage d'un système d'échangeur thermique couplé et système d'échangeur thermique Download PDF

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Publication number
EP3006875A1
EP3006875A1 EP14003476.0A EP14003476A EP3006875A1 EP 3006875 A1 EP3006875 A1 EP 3006875A1 EP 14003476 A EP14003476 A EP 14003476A EP 3006875 A1 EP3006875 A1 EP 3006875A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
flow
fluid
exchanger system
partial flow
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.)
Withdrawn
Application number
EP14003476.0A
Other languages
German (de)
English (en)
Inventor
Valdo Bahner
Thomas Hecht
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Priority to EP14003476.0A priority Critical patent/EP3006875A1/fr
Priority to US15/513,167 priority patent/US10345040B2/en
Priority to PCT/EP2015/001980 priority patent/WO2016055162A1/fr
Priority to EA201790797A priority patent/EA201790797A1/ru
Priority to KR1020177012429A priority patent/KR20170066595A/ko
Priority to EP15781577.0A priority patent/EP3204704A1/fr
Priority to CN201580054538.3A priority patent/CN106796081B/zh
Publication of EP3006875A1 publication Critical patent/EP3006875A1/fr
Withdrawn legal-status Critical Current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
    • F25J3/04763—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
    • F25J3/04854—Safety aspects of operation
    • F25J3/0486—Safety aspects of operation of vaporisers for oxygen enriched liquids, e.g. purging of liquids
    • 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
    • F25J3/042—Division of the main heat exchange line in consecutive sections having different functions having an intermediate feed connection
    • 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
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04193—Division of the main heat exchange line in consecutive sections having different functions
    • F25J3/04206—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product
    • F25J3/04212—Division of the main heat exchange line in consecutive sections having different functions including a so-called "auxiliary vaporiser" for vaporising and producing a gaseous product and simultaneously condensing vapor from a column serving as reflux within the or another 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
    • F25J3/04151—Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • 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
    • F25J3/04187—Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams
    • F25J3/04218—Parallel arrangement of the main heat exchange line in cores having different functions, e.g. in low pressure and high pressure cores
    • F25J3/04224—Cores associated with a liquefaction or refrigeration cycle
    • 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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0033—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for cryogenic applications

Definitions

  • the invention relates to a method for controlling a coupled heat exchanger system according to the preamble of patent claim 1.
  • EP 1150082 A1 shows a heat exchanger system in which a first fluid stream, which is formed by atmospheric air, is cooled in a heat exchanger system in countercurrent to a second fluid stream (nitrogen) and a third fluid stream (oxygen).
  • the heat exchanger system has a plurality of parallel heat exchanger blocks.
  • a “mass flow control device” is understood here to mean any device which specifically influences the mass flow of a fluid.
  • a mass flow control device may be formed, for example, as a manual valve, control valve, flap or fixed aperture.
  • the invention has for its object to operate a heat exchanger system of the type mentioned so that the heat exchange is carried out particularly efficiently and a particularly long service life of the heat exchanger blocks is achieved.
  • This object is achieved in that an intermediate temperature is measured at one of the two heat exchanger blocks between the hot and the cold end and is set as a function of the current value of this intermediate temperature, which part of the first fluid flow goes into the first partial flow and which in the second partial flow.
  • the division of the first fluid flow onto the blocks is carried out in such a way that the intermediate temperature comes as close as possible to its desired value.
  • variable temperature profiles can be measured very accurately and influenced quickly.
  • These altered temperature profiles inside the heat exchangers can not be detected with sufficient accuracy by observing the inlet and outlet temperatures.
  • the temperature profiles inside the heat exchanger change before the change in the outlet temperatures becomes visible.
  • a control based on the measurement of the inlet and outlet temperatures can therefore react to deviations of the temperature profiles only very late.
  • an intermediate temperature can also be measured at both heat exchanger blocks;
  • the heat exchanger system of the invention may also have more than two, for example three or four or even more heat exchanger blocks.
  • a first mass flow actuator is disposed in the conduit of the first substream upstream or downstream of the heat exchanger system, and a second mass flow actuator is in the conduit of the second substream upstream or downstream of the heat exchanger system; one of these two mass flow control devices is designed as a control valve and is set in dependence on the current value of the intermediate temperature.
  • the other mass flow control device may have various types, such as manual valve, control valve, flap or fixed orifice.
  • the mass flow actuators may be located upstream or downstream of the corresponding heat exchanger block. The valves should be tightly closed to protect the heat exchanger blocks at standstill.
  • the first fluid stream in the heat exchanger system is cooled, and the second and third fluid streams are warmed in the heat exchanger system.
  • the first fluid stream in the heat exchanger system is warmed and the second and third fluid streams are cooled in the heat exchanger system.
  • the first and the second variant can also be combined by - starting from the first variant - the second and the third fluid flow are formed by partial flows of a fourth fluid flow;
  • a second intermediate temperature is measured on that of the two heat exchanger blocks, on which not the first intermediate temperature is measured; the measurement of the second intermediate temperature is measured between the warm and the cold end.
  • this second intermediate temperature it is set which part of the fourth fluid flow goes into the second fluid flow and which into the third fluid flow.
  • the invention is applied twice, so to speak, namely both a split stream to be cooled (the first fluid stream) and a split stream to be heated (fourth stream of fluid).
  • measuring and adjusting devices are mainly shown.
  • Other measuring and control devices have been omitted as a rule for the sake of clarity.
  • additional devices such as valves are to be arranged.
  • the heat exchanger system of FIG. 1 consists of a first heat exchanger block 1 and a second heat exchanger block 2.
  • a "first fluid stream” 3 is divided into a "first partial stream” 4 and a “second partial stream” 5 and cooled in the two blocks 1, 2 of the heat exchanger system.
  • a second fluid flow 6 and a third fluid flow 7 are warmed, the second fluid flow 6 in the first heat exchanger block 1, the third fluid flow 7 in the second heat exchanger block 2.
  • the warmed second fluid stream 10 and the warmed third fluid stream 11 are withdrawn.
  • the cooled part streams are combined and withdrawn as a cooled first fluid stream 12.
  • valves 13 and 14 are shown in the first fluid flow.
  • valves may be required for the operation of the heat exchanger system.
  • the valve 14 is designed as a valve with a fixed control variable and is preset.
  • the valve 14 is ideally 100% open, but must be closed by hand, or via a corresponding control function to increase the pressure loss across heat exchanger block 1, if the distribution of pressure losses is so unfavorable that the temperature profile is no longer alone on the valve 13 can be regulated.
  • the signal line contains a controller, not shown, which transmits the regulating valve 13 the value to be set for the flow in the second partial flow 5.
  • the controller can be formed by an analog electronic circuit or a digital device (for example, signal processor, memory program control, microprocessor) or alternatively realized in the process control system.
  • the aim of the control is to achieve the best possible temperature profile over the height of the heat exchanger blocks.
  • the target value of the temperature TI is determined by a theoretically determined temperature profile and the exact location of the temperature measurement. This target value can be fixed. Alternatively, the target value is given variable in time, for example in the case of changing process conditions such as, for example, variable inlet temperatures of the streams. It may be useful to also measure the temperatures at the warm and / or cold end of the heat exchanger blocks and include in the scheme.
  • the first fluid flow is formed by air, the second fluid flow by nitrogen and the third fluid flow by oxygen.
  • the invention can also be realized if the drawing is tilted vertically and thus the first fluid stream is the stream to be cooled.
  • FIG. 2 corresponds largely FIG. 1 , Here, however, a current to be heated is divided between the two heat exchanger blocks 1, 2.
  • a fourth fluid stream 20 is branched into the second fluid stream 6 and the third fluid stream 7.
  • the warmed second fluid stream 10 and the warmed third fluid stream 11 are then combined again to a heated fourth fluid stream 21.
  • a fifth fluid flow 26/27 flows through the first heat exchanger block 1.
  • the second and third fluid streams are operated as follows in the embodiment.
  • the valve 22 is configured as a manual valve and preset.
  • the valve 23 is designed as a control valve; its setting is dependent on the temperature difference TI1 - TI2; The aim of the scheme is to keep this difference at zero, that is to bring the temperatures of the cold end of both heat exchanger blocks to the same level.
  • the regulation of the first fluid flow takes place as in the example of FIG. 1 depending on the intermediate temperature TI.
  • the first fluid flow is formed by air, the fourth fluid flow by nitrogen and the fifth fluid flow by oxygen.
  • FIG. 3 the control method according to the invention is applied twice, so to speak, in a heat exchanger system with three heat exchanger blocks 301, 302, 303.
  • An air stream 304 is passed through the heat exchanger system in four sub-streams 305, 306, 307, 308 and reunited in line 309.
  • a gaseous nitrogen product stream 310 is passed in two partial streams 311 and 312 through the left heat exchanger block 301 and through the right heat exchanger block 303, thereby warmed to approximately ambient temperature and reunited in line 313.
  • liquid pressurized oxygen 314 is first vaporized (or pseudo-vaporized if its pressure is supercritical) and then warmed to about ambient temperature.
  • a partial flow 316 of a high-pressure air flow 315 is liquefied or pseudo-liquefied.
  • Another partial stream 317 of the high-pressure air 315 is cooled in the heat exchanger block only to an intermediate temperature and then fed to an expansion turbine, not shown.
  • the partial flow 306 of the air flow 304 serves as a compensating flow between heat exchanger blocks 301 and 302. It is taken from the block 302 at an intermediate temperature and introduced into the block 301 at a location corresponding to this intermediate temperature.
  • the "first substream" of claim 1 is formed by the stream 305 and the "second substream” by the stream 307.
  • the distribution of these two air streams to the two heat exchanger blocks 301 and 302 is carried out as a function of an intermediate temperature TIa of the heat exchanger block 302.
  • This intermediate temperature Tla is measured in the stream 306 after leaving the heat exchanger block 302 and before entering the heat exchanger block 301.
  • the temperature measurement TIa influences the opening of the valve 319.
  • an intermediate temperature Tlb is measured on the surface of the heat exchanger block 303.
  • the "first partial flow” of patent claim 1 is formed by the nitrogen flow 311, the “second partial flow” by the nitrogen flow 312.
  • the opening of the valve 320 is adjusted as a function of the temperature Tlb.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Control Of Temperature (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP14003476.0A 2014-10-09 2014-10-09 Procédé de réglage d'un système d'échangeur thermique couplé et système d'échangeur thermique Withdrawn EP3006875A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP14003476.0A EP3006875A1 (fr) 2014-10-09 2014-10-09 Procédé de réglage d'un système d'échangeur thermique couplé et système d'échangeur thermique
US15/513,167 US10345040B2 (en) 2014-10-09 2015-10-08 Method for controlling a coupled heat exchanger system and heat exchanger system
PCT/EP2015/001980 WO2016055162A1 (fr) 2014-10-09 2015-10-08 Procédé de régultation d'un système d'échangeurs de chaleur couplés et système d'échangeurs de chaleur
EA201790797A EA201790797A1 (ru) 2014-10-09 2015-10-08 Способ регулировки сдвоенной теплообменной системы и теплообменная система
KR1020177012429A KR20170066595A (ko) 2014-10-09 2015-10-08 커플링된 열 교환기 시스템을 제어하기 위한 방법 및 열 교환기 시스템
EP15781577.0A EP3204704A1 (fr) 2014-10-09 2015-10-08 Procédé de régultation d'un système d'échangeurs de chaleur couplés et système d'échangeurs de chaleur
CN201580054538.3A CN106796081B (zh) 2014-10-09 2015-10-08 控制耦合的换热器系统的方法和换热器系统

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14003476.0A EP3006875A1 (fr) 2014-10-09 2014-10-09 Procédé de réglage d'un système d'échangeur thermique couplé et système d'échangeur thermique

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EP3388775A1 (fr) * 2017-04-10 2018-10-17 Linde Aktiengesellschaft Procédé de fonctionnement d'un échangeur thermique et échangeur thermique adapté
RU2755968C1 (ru) * 2018-07-31 2021-09-23 Л'Эр Ликид, Сосьете Аноним Пур Л'Этюд Э Л'Эксплуатасьон Де Проседе Жорж Клод Теплообменник с улучшенной конфигурацией проходов, связанные с ним способы обмена теплом

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DE102018003479A1 (de) * 2018-04-27 2019-10-31 Linde Aktiengesellschaft Plattenwärmetauscher, verfahrenstechnische Anlage und Verfahren

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EP1150082A1 (fr) 2000-04-28 2001-10-31 Linde Aktiengesellschaft Procédé et dispositif d'échange de chaleur
DE102007021564A1 (de) 2007-05-08 2008-11-20 Linde Ag Verfahren zur Temperaturmessung in Anlagenteilen
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US3167113A (en) * 1962-09-13 1965-01-26 Phillips Petroleum Co Equalization of loads on heat exchangers
US4381814A (en) * 1980-10-01 1983-05-03 Phillips Petroleum Company Control of heat transfer from heat exchangers in parallel
JPS59137797A (ja) * 1983-01-28 1984-08-07 Hitachi Ltd 多連式熱交換器の温度平衡制御方法
JPS59142397A (ja) * 1983-02-04 1984-08-15 Hitachi Ltd 空気分離装置用切換式熱交換器群の温度制御方法
DE4204172A1 (de) * 1992-02-13 1993-08-19 Linde Ag Verfahren zur behandlung eines einsatzstromes und verfahren zur tieftemperaturzerlegung von luft
EP1150082A1 (fr) 2000-04-28 2001-10-31 Linde Aktiengesellschaft Procédé et dispositif d'échange de chaleur
DE102007021564A1 (de) 2007-05-08 2008-11-20 Linde Ag Verfahren zur Temperaturmessung in Anlagenteilen
DE102009042994A1 (de) * 2009-09-25 2011-03-31 Linde Aktiengesellschaft Verfahren und Vorrichtung zur sicherheitstechnischen Überwachung eines thermisch belasteten Apparates
DE202013008316U1 (de) 2013-09-19 2013-10-18 Linde Aktiengesellschaft Plattenwärmetauscher und Wärmetauschereinheit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3388775A1 (fr) * 2017-04-10 2018-10-17 Linde Aktiengesellschaft Procédé de fonctionnement d'un échangeur thermique et échangeur thermique adapté
RU2755968C1 (ru) * 2018-07-31 2021-09-23 Л'Эр Ликид, Сосьете Аноним Пур Л'Этюд Э Л'Эксплуатасьон Де Проседе Жорж Клод Теплообменник с улучшенной конфигурацией проходов, связанные с ним способы обмена теплом

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KR20170066595A (ko) 2017-06-14
EA201790797A1 (ru) 2017-08-31
CN106796081B (zh) 2019-12-17
US20170314852A1 (en) 2017-11-02
WO2016055162A1 (fr) 2016-04-14
EP3204704A1 (fr) 2017-08-16
US10345040B2 (en) 2019-07-09

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