EP3204704A1 - Verfahren zur regelung eines gekoppelten wärmetauscher-systems und wärmetauscher-system - Google Patents
Verfahren zur regelung eines gekoppelten wärmetauscher-systems und wärmetauscher-systemInfo
- Publication number
- EP3204704A1 EP3204704A1 EP15781577.0A EP15781577A EP3204704A1 EP 3204704 A1 EP3204704 A1 EP 3204704A1 EP 15781577 A EP15781577 A EP 15781577A EP 3204704 A1 EP3204704 A1 EP 3204704A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- fluid stream
- flow
- fluid
- intermediate temperature
- 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- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000012530 fluid Substances 0.000 claims abstract description 69
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 238000005259 measurement Methods 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000006870 function Effects 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000011064 split stream procedure Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- F25J3/04854—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
- 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
- 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 flow, which is formed by atmospheric air, in a heat exchanger system in
- the heat exchanger system has a plurality of parallel heat exchanger blocks.
- DE 4204172 A1 also shows such a method in FIG.
- the control tries to keep the intermediate temperatures in the various blocks as equal as possible by setting a small bypass.
- Temperature differences can cause very small changes in the flow rates to very different temperature profiles within the heat exchanger.
- 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 the scheme achieves a reduction of the load of the heat exchanger by load changes by the
- variable temperature profiles can be determined very accurately and influenced quickly.
- These altered temperature profiles inside the heat exchangers can be monitored by monitoring the input and output
- Outlet temperatures can not be detected with sufficient accuracy.
- 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 be more than two, for example three or four or more
- any known method can be used, for example
- the first fluid stream is formed by a main stream through which at least 50 mol% of the total amount of fluid flowing in the direction of the first
- the main stream comprises, for example, 80 to 100 mol%, in particular 85 to 95 mol% of the total
- 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 as a function of 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.
- Heat exchanger system cooled, and the second and third fluid flow 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 heated 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 is set, which part of the fourth fluid flow goes into the second fluid flow and which in the third
- Fluid flow 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).
- Figure 1 shows a first embodiment of the invention with two
- Figure 2 shows a second embodiment of the invention with two
- Figure 3 shows a third embodiment with three heat exchanger blocks.
- 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 partial 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 includes a controller, not shown, the control valve 13, the value to be set for the flow in the second partial flow 5 transmitted.
- the controller can be formed by an analogue electronic circuit or a digital device (for example signal processor, memory program control, microprocessor) or alternatively in the
- Process control system can be realized.
- 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 Tl 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, including the temperatures at the warm and / or cold end of the or
- Heat exchanger blocks to measure 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.
- Figure 2 largely corresponds to Figure 1.
- 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.
- TM temperature at the cold end of the first heat exchanger block 1
- Tl intermediate temperature, measurement at an intermediate point 16 of the second
- the valve 22 is designed as a manual valve and
- the valve 23 is designed as a control valve; its setting is dependent on the temperature difference TM - 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.
- Control valve in the main stream of the second heat exchanger block 8 to be cooled
- the first fluid flow is formed by air, the fourth fluid flow by nitrogen and the fifth fluid flow by oxygen.
- 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 Heat exchanger blocks 301, 302, 303.
- An air flow 304 is divided into four sub-streams 305, 306, 307, 308 through the
- Heat exchanger system out and reunited in line 309.
- a gaseous nitrogen product stream 310 is passed in two partial streams 31 1 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 substream 316 of a high-pressure airflow 315 is liquefied or pseudo-liquefied.
- Another partial flow 317 of the high-pressure air 3 5 is in
- Heat exchanger block cooled 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 removed from block 302 at an intermediate temperature and introduced into the block 301 at a location corresponding to that intermediate temperature.
- Partial flow formed by the stream 307.
- the distribution of these two air streams on the two heat exchanger blocks 301 and 302 is a function of a
- Heat exchanger block 302 has left and before entering the heat exchanger block 301 entry.
- the temperature measurement TIa influences the opening of the valve 319 and thus the flow rate of the mainstream 307 to be cooled.
- 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 31 1, the “second partial flow” by the nitrogen flow 312.
- the opening of the valve 320, which determines the flow rate of the main flow 312 to be heated, is set as a function of the temperature Tlb.
Landscapes
- 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14003476.0A EP3006875A1 (de) | 2014-10-09 | 2014-10-09 | Verfahren zur Regelung eines gekoppelten Wärmetauscher-Systems und Wärmetauscher-System |
PCT/EP2015/001980 WO2016055162A1 (de) | 2014-10-09 | 2015-10-08 | Verfahren zur regelung eines gekoppelten wärmetauscher-systems und wärmetauscher-system |
Publications (1)
Publication Number | Publication Date |
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EP3204704A1 true EP3204704A1 (de) | 2017-08-16 |
Family
ID=51690795
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14003476.0A Withdrawn EP3006875A1 (de) | 2014-10-09 | 2014-10-09 | Verfahren zur Regelung eines gekoppelten Wärmetauscher-Systems und Wärmetauscher-System |
EP15781577.0A Withdrawn EP3204704A1 (de) | 2014-10-09 | 2015-10-08 | Verfahren zur regelung eines gekoppelten wärmetauscher-systems und wärmetauscher-system |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14003476.0A Withdrawn EP3006875A1 (de) | 2014-10-09 | 2014-10-09 | Verfahren zur Regelung eines gekoppelten Wärmetauscher-Systems und Wärmetauscher-System |
Country Status (6)
Country | Link |
---|---|
US (1) | US10345040B2 (de) |
EP (2) | EP3006875A1 (de) |
KR (1) | KR20170066595A (de) |
CN (1) | CN106796081B (de) |
EA (1) | EA201790797A1 (de) |
WO (1) | WO2016055162A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3388775A1 (de) * | 2017-04-10 | 2018-10-17 | Linde Aktiengesellschaft | Verfahren zum betreiben eines wärmetauschers und geeigneter wärmetauscher |
DE102018003479A1 (de) * | 2018-04-27 | 2019-10-31 | Linde Aktiengesellschaft | Plattenwärmetauscher, verfahrenstechnische Anlage und Verfahren |
FR3084739B1 (fr) * | 2018-07-31 | 2020-07-17 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Echangeur de chaleur a configuration de passages amelioree, procedes d'echange de chaleur associes |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
MY117548A (en) * | 1998-12-18 | 2004-07-31 | Exxon Production Research Co | Dual multi-component refrigeration cycles for liquefaction of natural gas |
DE10021081A1 (de) | 2000-04-28 | 2002-01-03 | Linde Ag | Verfahren und Vorrichtung zum Wärmeaustausch |
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 |
CN104884893B (zh) * | 2012-10-09 | 2018-01-23 | 林德股份公司 | 换热器中温度分布的控制方法 |
DE202013008316U1 (de) | 2013-09-19 | 2013-10-18 | Linde Aktiengesellschaft | Plattenwärmetauscher und Wärmetauschereinheit |
-
2014
- 2014-10-09 EP EP14003476.0A patent/EP3006875A1/de not_active Withdrawn
-
2015
- 2015-10-08 EP EP15781577.0A patent/EP3204704A1/de not_active Withdrawn
- 2015-10-08 KR KR1020177012429A patent/KR20170066595A/ko not_active Withdrawn
- 2015-10-08 WO PCT/EP2015/001980 patent/WO2016055162A1/de active Application Filing
- 2015-10-08 US US15/513,167 patent/US10345040B2/en not_active Expired - Fee Related
- 2015-10-08 EA EA201790797A patent/EA201790797A1/ru unknown
- 2015-10-08 CN CN201580054538.3A patent/CN106796081B/zh active Active
Also Published As
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CN106796081B (zh) | 2019-12-17 |
US20170314852A1 (en) | 2017-11-02 |
KR20170066595A (ko) | 2017-06-14 |
WO2016055162A1 (de) | 2016-04-14 |
EA201790797A1 (ru) | 2017-08-31 |
EP3006875A1 (de) | 2016-04-13 |
US10345040B2 (en) | 2019-07-09 |
CN106796081A (zh) | 2017-05-31 |
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