EP1191291B1 - Regelverfahren für eine Tieftemperatur-Rektifikationsanlage - Google Patents
Regelverfahren für eine Tieftemperatur-Rektifikationsanlage Download PDFInfo
- Publication number
- EP1191291B1 EP1191291B1 EP20010122754 EP01122754A EP1191291B1 EP 1191291 B1 EP1191291 B1 EP 1191291B1 EP 20010122754 EP20010122754 EP 20010122754 EP 01122754 A EP01122754 A EP 01122754A EP 1191291 B1 EP1191291 B1 EP 1191291B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- column
- working
- relatively high
- high pressure
- liquid
- 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.)
- Expired - Lifetime
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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
- F25J3/04793—Rectification, e.g. columns; Reboiler-condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04248—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
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04642—Recovering noble gases from air
- F25J3/04648—Recovering noble gases from air argon
- F25J3/04654—Producing crude argon in a crude argon column
- F25J3/04666—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system
- F25J3/04672—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser
- F25J3/04678—Producing crude argon in a crude argon column as a parallel working rectification column of the low pressure column in a dual pressure main column system having a top condenser cooled by oxygen enriched liquid from high pressure column bottoms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04763—Start-up or control of the process; Details of the apparatus used
- F25J3/04769—Operation, control and regulation of the process; Instrumentation within the process
- F25J3/04793—Rectification, e.g. columns; Reboiler-condenser
- F25J3/048—Argon recovery
-
- 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
Definitions
- the invention relates to a method for regulating the capacity of a cryogenic rectification plant, in which a fluid in a working at a higher pressure column a cryogenic rectification unit is initiated, which at higher Pressure working column and a lower pressure column and at the liquid from the sump of the higher pressure working Column is passed into the lower pressure column.
- Control methods are known for changing the capacity of a cryogenic rectification plant, in which in the working at higher pressure column Setpoint for the sump level is set as manipulated variable. By changing the Setpoint of the sump level, the plant is on a modified amount of feed fluid set.
- the change in capacity is also called load change.
- the known control methods therefore have the goal keep the F / D ratio as constant as possible, so that the products of the Rectification plant for different load cases of the plant the same purity exhibit. This is in all known methods by a regulation of Sump level reached, which uses the level as a control variable.
- Control methods are known for example from the publications EP 0 684 436 or US 3,912,476 known.
- the invention is therefore based on the object of a method available provide a cryogenic rectification with consistent product purity Load changes, as well as in case of malfunction with fluctuating amount of input fluid guaranteed.
- This object is achieved according to the invention in that the amount of liquid, which is taken from the bottom of the working column at higher pressure and the working at lower pressure column is fed via a Flow control is regulated, with a manipulated variable for the flow control a desired flow rate is set and the level of the Liquid in the bottom of the working at higher pressure column without Setpoint setting according to the amount of liquid removed.
- flow control a FIC unit (Flow Indicated Control) as Control component used.
- This unit usually has one Flow meter, as well as at least one with the flow meter via a Control line connected, controllable valve on.
- the cryogenic rectification plant is a cryogenic rectification plant for air separation.
- Particularly preferred is to increase the Operational safety in addition to flow control a sump level indicator (Level Indicator) whose purpose is to exceed a set maximum value for the sump level, as well as the undershoot a specified minimum value. Appropriately, in the described Under- or overruns issued a warning signal.
- Level Indicator level Indicator
- a development of the invention provides that the cryogenic rectification plant in addition to the higher pressure column and the working at lower pressure column an argon column with a Head condenser and liquid from the sump at higher pressure working column in the top condenser and from the top condenser in the lower pressure working column is passed, wherein by means of Flow control a valve is controlled, the amount of zu adopteddem Fluid determined in the working at lower pressure column, and a valve is controlled, the corresponding amount of fluid in the top condenser of the Argon column enter.
- the degree of opening of the two valves by means of a split-range control specified. This is a division of the sump taken amount of liquid.
- the distribution of the amount on the two valves specified in proportions.
- the invention has the advantage that even with fluctuations of Use of fluid only a constant amount of liquid from the bottom of the higher pressure working column is removed. This leaves the diestechniksaufgabe in the working at lower pressure column constant and undisturbed. The rectification remains in the lower pressure column unchanged, good. The product purity is retained. Furthermore, one is Flow control a simple, with little effort on components to be realized, reliable control method.
- the change in the amount of feed fluid makes each case only in a change of Sump level noticeable, which without setpoint specification according to the Bottom of the working at higher pressure column amount Adjusting fluid.
- To increase security are just a maximum value and a Minimum value for the sump level. When exceeding the specified Maximum value for the sump level and below the specified level Minimum value is conveniently issued a warning signal. Within this Limits may be the sump level of the column operating at higher pressure or rise without disturbing the rectification.
- the removal amount of liquid from the sump increased or the amount of feed air reduced. It can also be the feed amount of the nitrogen-rich liquid in the be raised at a lower pressure column or in a storage tank.
- a working at a higher pressure column 1, a at lower pressure column 2, a subcooler 3, and a FIC control 4 (Flow Indicated Control 4), a valve 5, and a control line 6 are shown.
- the taken from the bottom of working at higher pressure column 1 Liquid is passed via the subcooler 3 to the FIC control 4, the one Flowmeter has.
- the flow and the resulting Feed via the valve 5 in the lower pressure column 2 is regulated so that the F / D ratio in the column 2 also change in itself Feed air quantity remains constant.
- a sump level indicator 7 mounted at the Exceeding a specified maximum value for the sump level and at Falls below a specified minimum value gives a signal.
- FIG. 2 shows, in addition to those already described in the section on FIG Components an argon column 8, a top condenser 9 of the argon column 8, and a second control line 10, which controls a second valve 11, through the the supply amount of fluid is fed to the overhead condenser 9 of the argon column 8 becomes.
- the FIC control 4 is executed in this example as a split-range control 4, thereby ensuring that the division of the withdrawn from the sump Amount of liquid to the two valves 5, 11 at a change of Flow rate through the FIC unit is adjusted so that the Readjust valve positions automatically according to their fluid proportions.
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)
Description
- Figur 1
- zeigt einen Ausschnitt einer Tieftemperatur-Rektifikationsanlage, die zur Durchführung des erfindungsgemäßen Verfahrens eine FIC-Regelung aufweist.
- Figur 2
- zeigt einen Ausschnitt einer Tieftemperatur-Rektifikationsanlage mit Argonkolonne, wobei zur Durchführung des erfindungsgemäßen Verfahrens eine FIC-Regelung vorgesehen ist, die zwei Ventile ansteuert.
Claims (5)
- Verfahren zur Regelung der Kapazität einer Tieftemperatur-Rektifikationsanlage, bei dem ein Fluid in eine bei höherem Druck arbeitende Kolonne (1) einer Tieftemperatur-Rektifikationsanlage eingeleitet wird, welche die bei höherem Druck arbeitende Kolonne (1) und eine bei niedrigerem Druck arbeitende Kolonne (2) aufweist, und bei dem Flüssigkeit von dem Sumpf der bei höherem Druck arbeitenden Kolonne (1) in die bei niedrigerem Druck arbeitende Kolonne (2) geleitet wird, dadurch gekennzeichnet, dass die Menge der Flüssigkeit, die aus dem Sumpf der bei höherem Druck arbeitenden Kolonne (1) entnommen wird und der bei niedrigerem Druck arbeitenden Kolonne (2) zugeführt wird, über eine Durchflussregelung (4) geregelt wird, wobei eine Stellgröße für die Durchflussregelung (4) auf eine gewünschte Durchflussmenge eingestellt ist und sich der Pegelstand der Flüssigkeit im Sumpf der bei höherem Druck arbeitenden Kolonne (1) ohne Sollwertvorgabe entsprechend der entnommenen Menge an Flüssigkeit einstellt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Tieftemperatur-Rektifikationsanlage eine Tieftemperatur-Rektifikationsanlage zur Luftzerlegung ist.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Tieftemperatur-Rektifikationsanlage zusätzlich zu der bei höherem Druck arbeitenden Kolonne (1) und der bei niedrigerem Druck arbeitenden Kolonne (2) eine Argonkolonne (8) mit einem Kopfkondensator (9) aufweist und Flüssigkeit von dem Sumpf der bei höherem Druck arbeitenden Kolonne (1) in den Kopfkondensator (9) und von dem Kopfkondensator (9) in die bei niedrigerem Druck arbeitende Kolonne (2) geleitet wird, wobei mittels der Durchflussregelung (4) ein Ventil (5) angesteuert wird, das die Menge an zuzuführendem Fluid in die bei niedrigerem Druck arbeitende Kolonne (2) bestimmt, und ein Ventil (11) angesteuert wird, das die entsprechende Menge an Fluid in den Kopfkondensator (9) der Argonkolonne (8) eintreten lässt.
- Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass der Öffnungsgrad der beiden Ventile (5, 11) mittels einer Split-Range-Regelung (4) vorgegeben wird.
- Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass bei einer Erhöhung der Kapazität einer Tieftemperatur-Rektifikationsanlage keine außerhalb der bei höherem Druck arbeitenden Kolonne (1) gespeicherte stickstoffreiche Flüssigkeit in die bei höherem Druck arbeitende Kolonne (1) eingeführt wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20010122754 EP1191291B1 (de) | 2000-09-21 | 2001-09-21 | Regelverfahren für eine Tieftemperatur-Rektifikationsanlage |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10047102A DE10047102A1 (de) | 2000-09-21 | 2000-09-21 | Regelverfahren für eine Tieftemperatur-Rektifikationsanlage |
DE10047102 | 2000-09-21 | ||
EP01103827 | 2001-02-15 | ||
EP01103827A EP1191290A1 (de) | 2000-09-21 | 2001-02-15 | Regelverfahren für eine Tieftemperatur-Rektifikationsanlage |
EP20010122754 EP1191291B1 (de) | 2000-09-21 | 2001-09-21 | Regelverfahren für eine Tieftemperatur-Rektifikationsanlage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1191291A1 EP1191291A1 (de) | 2002-03-27 |
EP1191291B1 true EP1191291B1 (de) | 2005-05-04 |
Family
ID=27214078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20010122754 Expired - Lifetime EP1191291B1 (de) | 2000-09-21 | 2001-09-21 | Regelverfahren für eine Tieftemperatur-Rektifikationsanlage |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1191291B1 (de) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4784677A (en) * | 1987-07-16 | 1988-11-15 | The Boc Group, Inc. | Process and apparatus for controlling argon column feedstreams |
DE3732363A1 (de) * | 1987-09-25 | 1989-04-06 | Linde Ag | Verfahren und vorrichtung zum wiederanfahren einer gaszerlegungsanlage |
FR2676371B1 (fr) * | 1991-05-17 | 1993-07-23 | Air Liquide | Colonne de distillation d'air a garnissage ondule-croise. |
FR2704632B1 (fr) * | 1993-04-29 | 1995-06-23 | Air Liquide | Procede et installation pour la separation de l'air. |
US5996373A (en) * | 1998-02-04 | 1999-12-07 | L'air Liquide, Societe Ananyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Cryogenic air separation process and apparatus |
-
2001
- 2001-09-21 EP EP20010122754 patent/EP1191291B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1191291A1 (de) | 2002-03-27 |
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