EP1191291A1 - Regelverfahren für eine Tieftemperatur-Rektifikationsanlage - Google Patents
Regelverfahren für eine Tieftemperatur-Rektifikationsanlage Download PDFInfo
- Publication number
- EP1191291A1 EP1191291A1 EP01122754A EP01122754A EP1191291A1 EP 1191291 A1 EP1191291 A1 EP 1191291A1 EP 01122754 A EP01122754 A EP 01122754A EP 01122754 A EP01122754 A EP 01122754A EP 1191291 A1 EP1191291 A1 EP 1191291A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- column
- operating
- liquid
- higher pressure
- amount
- 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.)
- Granted
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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 controlling the capacity of a low-temperature rectification plant, in which a fluid in a column operating at higher pressure a low-temperature rectification plant is initiated, which the higher Pressure working column and a lower pressure column and the liquid from the sump is operating at higher pressure Column is passed into the column operating at a lower pressure.
- Control methods for changing the capacity of a low-temperature rectification plant are known, with those in the column operating at higher pressure Setpoint for the sump level is set as the manipulated variable.
- the setpoint of the sump level is set to a changed amount of feed fluid set.
- the change in capacity is also called load change.
- F / D ratio ratio of liquid to steam
- the object of the invention is therefore to provide a method provide a low-temperature rectification with constant product purity Load changes, as well as in the event of malfunctions with fluctuating amount of feed fluid guaranteed.
- This object is achieved in that the amount of liquid, which is taken from the bottom of the column operating at higher pressure and which is fed to the column operating at a lower pressure, 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 column operating at higher pressure without Set the target value according to the amount of liquid withdrawn.
- a FIC unit Flow Indicated Control
- This unit usually has one Flow meter, as well as at least one with the flow meter over a Control line connected, controllable valve.
- the low-temperature rectification system is preferably a low-temperature rectification system for air separation. It is particularly preferred to increase the Operational safety in addition to flow control, a sump level indicator (level Indicator), the purpose of which is to exceed a displayed maximum value for the sump level, as well as the shortfall a set minimum value. Expediently, the described A warning signal is given if the values are exceeded or not reached.
- level Indicator level Indicator
- a further development of the invention provides that the low-temperature rectification system in addition to the higher pressure column and the an argon column with a Has top condenser and liquid from the sump which at higher pressure working column in the top condenser and from the top condenser in the lower pressure column is passed, the amount of liquid, which is taken from the bottom of the column operating at higher pressure, is regulated by means of a flow control, wherein a valve is actuated which the amount of fluid to be fed into the lower pressure column determined, and a valve is actuated that the corresponding amount of fluid in allows the top condenser of the argon column to enter.
- the degree of opening of the two valves by means of a split range control is particularly advantageous specified. This divides the from the swamp withdrawn amount of liquid. The distribution of the quantity on the both valves specified in proportions. When the flow rate changes the valve positions adapt automatically according to their proportions.
- the invention has the advantage that even with fluctuations Use fluid amount only a constant amount of liquid from the bottom of the higher pressure working column is removed. This leaves the Liquid feed into the column operating at lower pressure constant and undisturbed. The rectification in the column operating at a lower pressure remains unchanged good. The product purity is maintained. Furthermore, one Flow control an easy to implement with little effort on components reliable control method.
- the change in the amount of feed fluid is only reflected in a change in the The sump level is noticeable, which corresponds to that from the Bottom of the amount withdrawn from the column operating at higher pressure Liquid adjusts.
- Liquid adjusts To increase security, there are only a maximum value and a Minimum value set for the sump level. If the specified limit is exceeded Maximum value for the sump level and if the specified level is undershot A jerk signal is expediently given as a minimum value.
- the bottom level of the column operating at higher pressure can fall or increase without having a disruptive effect on the rectification.
- the amount of liquid withdrawn from the sump increases or the amount of feed air reduced. It can also be the amount of nitrogen-rich liquid in the column operating at a lower pressure or into a storage tank.
- FIG. 1 shows a column 1 operating at higher pressure, one 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 withdrawn from the bottom of column 1 operating at higher pressure Liquid is passed through the subcooler 3 to the FIC control 4, which is a Has flow meter.
- the flow and the resulting one Feed via the valve 5 into the column 2 operating at a lower pressure regulated so that the F / D ratio in column 2 also changes The quantity of input air remains constant.
- the flow of the Fluids measured after the fluid has passed the subcooler 3.
- a sump level indicator 7 (Level Indicator 7) attached at Exceeding a specified maximum value for the sump level and at Emits a signal if the value falls below a specified minimum value.
- FIG. 2 shows in addition to those already described in the section on FIG. 1 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 which the supply amount of fluid is fed into the top condenser 9 of the argon column 8 becomes.
- the FIC control 4 is designed as a split range control 4, which ensures that the division of those extracted from the swamp Amount of liquid on the two valves 5, 11 when the Flow rate through the FIC unit is adjusted so that the Readjust valve positions automatically according to their fluid content.
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- 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
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 die Menge der Flüssigkeit, die aus dem Sumpf der bei höherem Druck arbeitenden Kolonne (1) entnommen wird, mittels einer Durchflussregelung (4) geregelt wird, wobei 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 true EP1191291A1 (de) | 2002-03-27 |
EP1191291B1 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 |
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EP (1) | EP1191291B1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0299751A2 (de) * | 1987-07-16 | 1989-01-18 | The BOC Group, Inc. | Verfahren und Apparat zur Regelung der Speiseströme der Argonkolonne |
DE3732363A1 (de) * | 1987-09-25 | 1989-04-06 | Linde Ag | Verfahren und vorrichtung zum wiederanfahren einer gaszerlegungsanlage |
FR2676371A1 (fr) * | 1991-05-17 | 1992-11-20 | Air Liquide | Colonne de distillation d'air a garnissage ondule-croise. |
US5901580A (en) * | 1993-04-29 | 1999-05-11 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and installation for the separation of air |
EP0935109A2 (de) * | 1998-02-04 | 1999-08-11 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft |
-
2001
- 2001-09-21 EP EP20010122754 patent/EP1191291B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0299751A2 (de) * | 1987-07-16 | 1989-01-18 | The BOC Group, Inc. | Verfahren und Apparat zur Regelung der Speiseströme der Argonkolonne |
DE3732363A1 (de) * | 1987-09-25 | 1989-04-06 | Linde Ag | Verfahren und vorrichtung zum wiederanfahren einer gaszerlegungsanlage |
FR2676371A1 (fr) * | 1991-05-17 | 1992-11-20 | Air Liquide | Colonne de distillation d'air a garnissage ondule-croise. |
US5901580A (en) * | 1993-04-29 | 1999-05-11 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process and installation for the separation of air |
EP0935109A2 (de) * | 1998-02-04 | 1999-08-11 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Verfahren und Vorrichtung zur Tieftemperaturzerlegung von Luft |
Also Published As
Publication number | Publication date |
---|---|
EP1191291B1 (de) | 2005-05-04 |
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