WO2011039056A1 - Steam pressure controller - Google Patents
Steam pressure controller Download PDFInfo
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- WO2011039056A1 WO2011039056A1 PCT/EP2010/063592 EP2010063592W WO2011039056A1 WO 2011039056 A1 WO2011039056 A1 WO 2011039056A1 EP 2010063592 W EP2010063592 W EP 2010063592W WO 2011039056 A1 WO2011039056 A1 WO 2011039056A1
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- WIPO (PCT)
- Prior art keywords
- steam
- pressure
- thermocompressor
- working
- generating
- 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.)
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/20—Waste heat recovery
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/022—Heating the cylinders
- D21F5/028—Heating the cylinders using steam
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F5/00—Dryer section of machines for making continuous webs of paper
- D21F5/02—Drying on cylinders
- D21F5/06—Regulating temperature
Definitions
- the invention relates to a device for steam supply of technical equipment, in particular a fibrous web production machine.
- the paper web is formed from a very wet pulp suspension, which first passes through a headbox into a wire section, in which a large part of the water is removed. Thereafter, it is further dewatered in a press section before being fed to a dryer section.
- a dryer section of a paper machine typically comprises a number of hollow metal drying cylinders to which pressurized steam is supplied to heat the peripheral surfaces of the cylinders.
- the paper to be dried is guided on a path which brings it into contact with the circumferential surface of each drying cylinder in turn.
- the heat supplied to the paper web by means of the drying cylinders in the form of steam heats the paper web and in this way promotes the evaporation of the water from the paper web.
- a very high dry content of the paper web should be achieved.
- the paper web has a dry content of 45 percent when entering the dryer section and leaves the dryer section with a dry content of about 92 percent to 98 percent.
- the amount of heat supplied to the paper web as it passes through each drying cylinder is a function of the temperature of the peripheral surface of the corresponding drying cylinder.
- the temperature in turn is a function of the vapor pressure in the drying cylinder. For example, a drying cylinder with a higher vapor pressure is hotter than a drying cylinder with a lower vapor pressure. But also in other places in the machine steam is needed which has a corresponding working steam pressure.
- steam is generated in the steam boiler and, in addition, waste heat steam from steam-producing processes is used.
- the steam from both steam sources is mixed and fed to the machine.
- the invention is therefore an object of the invention to provide a device and a method for creating at the / the steam supply of a technical system can be improved and made more energy efficient.
- fibrous web making machines such as e.g. Paper machines consume very large amounts of water vapor in the production of the fibrous web around the many steam consumers, such as e.g. to supply the drying cylinders.
- a portion of the steam required is usually from plant parts in which one or more steam-producing processes take place, e.g. in the TMP plant.
- the steam supply is thus composed of two components, on the one hand from steam from a steam generating device with one or more Steam boilers, which generates the working steam with a vapor pressure of P D 2, and on the other from waste heat from the steam generating processes, which has a vapor pressure of P D i.
- the device according to the invention has a thermocompressor.
- thermocompressor With the thermocompressor, the waste heat steam is raised to the desired level of the steam working pressure PD3 so that the machine can operate at the optimum steam pressure level.
- the performance of the fibrous web manufacturing machine can be increased, while at the same time the steam-generating processes can be operated with optimum operating pressure.
- the drive of the thermocompressor is preferably carried out by means of high-pressure steam from the steam generating device.
- the waste heat steam is brought in the thermocompressor by the high-pressure steam to a higher vapor pressure of 2.0 - 3.5 bar.
- the steam pressure is increased to 2.3 - 2.7 bar, as most steam consumers in the system have the best efficiency at 2.3 - 2.7 bar.
- thermocompressor To control the thermocompressor, a pressure control is provided which controls the thermocompressor in relation to the measured vapor pressure P D i of the waste heat vapor.
- the working steam from the steam generating device and the steam from the thermocompressor (4) are then merged into a steam line.
- a turbine is preferably provided which relaxes the high-pressure steam to the working steam pressure P D 3 and thereby drives a generator for power generation.
- a turbine is preferably provided which relaxes the high-pressure steam to the working steam pressure P D 3 and thereby drives a generator for power generation.
- the heat recovery steam with a vapor pressure of P D i is used.
- the vapor pressure PDI from the steam-producing processes before being combined with the working steam is increased to the steam supply pressure of P D 3 required in the plant.
- the waste heat steam pressure P D i from the steam-generating process is preferably increased by means of a thermocompressor to the steam supply pressure of P D 3 required in the system.
- thermocompressor is controlled by means of a pressure control, which regulates the thermocompressor in relation to the measured vapor pressure P D i.
- Figure 1 shows the structure of a system according to the prior art
- FIG. 2 shows the structure of a first variant of a system according to the invention
- Figure 3 shows the structure of a second variant of an inventive
- FIG. 4 Symbol explanation according to DIN 2481; 1 shows the structure of a system for supplying a paper machine with working steam according to the prior art.
- the system comprises two steam sources 2, 5 from which a mixture is formed, which is made available to the paper machine as working steam 3.
- the working pressure may have a maximum of the pressure of the waste heat vapor and Abracermmedampfdruckschwankungen can be compensated only bad.
- FIG. 2 illustrates the construction of a first variant of a system according to the invention for supplying steam to a paper or fiber web production machine 11.
- thermocompressor 4 the pressure of the waste heat steam 2 is increased by means of a propellant medium such that the vapor pressure is equal to that of the desired working vapor 3.
- a driving medium e.g. High pressure steam 1 can be used. But it is also conceivable that low-pressure steam is used, with a corresponding difference in vapor pressure must be present in order to operate the thermocompressor 4 economically.
- a pressure control 7 is provided.
- thermo-compressor live steam 5 with a live steam pressure P D 2, which corresponds to the working steam pressure P D 3, must be supplied.
- FIG. 3 illustrates the structure of a second variant of a system according to the invention for supplying steam to a paper or fiber web production machine 11. In essence, this system corresponds to the system shown and described in FIG.
- the difference is that the live steam 6 is brought to the proper pressure level of the working steam pressure PD2 by the live steam pressure PD2 by relaxing the high-pressure steam 1 in the turbine 13.
- Figures 4 are symbol explanations for all drawings from 1 to 4 according to DIN 2481 -Waermekraftanlagen specified.
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Abstract
Description
Dampfdruckregelung Steam pressure control
Die Erfindung betrifft eine Vorrichtung zur Dampfversorgung von technischen Anlagen, insbesondere einer Faserstoffbahnherstellungsmaschine. The invention relates to a device for steam supply of technical equipment, in particular a fibrous web production machine.
In einer Faserstoffbahnherstellungsmaschine wie z.B. einer Papiermaschine wird die Papierbahn aus einer sehr nassen Faserstoffsuspension gebildet, die zunächst über einen Stoffauflauf in eine Siebpartie gelangt, in der ein Großteil des Wassers entfernt wird. Danach wird sie in einer Pressenpartie weiter entwässert, bevor sie einer Trockenpartie zugeführt wird. Eine solche Trockenpartie einer Papiermaschine umfasst typischerweise eine Anzahl von hohlen metallenen Trockenzylindern denen unter Druck stehender Dampf zugeführt wird, um die Umfangsflächen der Zylinder zu erhitzen. In a fibrous web making machine such as e.g. a paper machine, the paper web is formed from a very wet pulp suspension, which first passes through a headbox into a wire section, in which a large part of the water is removed. Thereafter, it is further dewatered in a press section before being fed to a dryer section. Such a dryer section of a paper machine typically comprises a number of hollow metal drying cylinders to which pressurized steam is supplied to heat the peripheral surfaces of the cylinders.
Das zu trocknende Papier wird auf einen Weg geführt, der es mit der Umfangsflä- che jedes Trockenzylinders der Reihe nach in Kontakt bringt. Die der Papierbahn mittels der Trockenzylinder zugeführte Wärme in Form von Dampf erhitzt die Papierbahn und fördert auf diese Weise die Verdunstung des Wassers aus der Papierbahn. Letztendlich soll ein sehr hoher Trockengehalt der Papierbahn erreicht werden. So besitzt die Papierbahn beispielsweise beim Eintritt in die Trockenpartie einen Trockengehalt von 45 Prozent und verlässt die Trockenpartie mit einem Trockengehalt von etwa 92 Prozent bis 98 Prozent. Die der Papierbahn zugeführte Wärmemenge beim Passieren jedes Trockenzylinders ist eine Funktion der Temperatur der Umfangsfläche des entsprechenden Trockenzylinders. Die Temperatur wiederum ist eine Funktion des Dampfdruckes im Trockenzylinder. So ist beispielsweise ein Trockenzylinder mit höherem Dampfdruck heißer als ein Trockenzylinder mit geringerem Dampfdruck. Aber auch an anderen Stellen in der Maschine wird Dampf benötigt der einen entsprechenden Arbeitsdampfdruck aufweist. The paper to be dried is guided on a path which brings it into contact with the circumferential surface of each drying cylinder in turn. The heat supplied to the paper web by means of the drying cylinders in the form of steam heats the paper web and in this way promotes the evaporation of the water from the paper web. Ultimately, a very high dry content of the paper web should be achieved. Thus, for example, the paper web has a dry content of 45 percent when entering the dryer section and leaves the dryer section with a dry content of about 92 percent to 98 percent. The amount of heat supplied to the paper web as it passes through each drying cylinder is a function of the temperature of the peripheral surface of the corresponding drying cylinder. The temperature in turn is a function of the vapor pressure in the drying cylinder. For example, a drying cylinder with a higher vapor pressure is hotter than a drying cylinder with a lower vapor pressure. But also in other places in the machine steam is needed which has a corresponding working steam pressure.
Zur Versorgung der Papiermaschine wird Dampf in Dampfkessel erzeugt und zusätzlich Abwärmedampf aus dampferzeugenden Prozessen verwendet. Der Dampf aus beiden Dampfquellen wird gemischt und der Maschine zugeführt. To supply the paper machine, steam is generated in the steam boiler and, in addition, waste heat steam from steam-producing processes is used. The steam from both steam sources is mixed and fed to the machine.
Damit der in den Dampfkesseln erzeugte Hochdruckdampf als Arbeitsdampf verwendet werden kann, ist es notwendig, diesen zu entspannen. Dies geschieht üblicherweise in einer Turbine mit der ein Generator angetrieben wird. In order for the high-pressure steam generated in the steam boilers can be used as working steam, it is necessary to relax this. This is usually done in a turbine with a generator is driven.
Das Problem bei diesem Verfahren der Dampfversorgung ist es allerdings, dass der dampferzeugende Prozess eine Limitierung des Dampfarbeitsdruckes bewirkt. Die TMP-Anlage wie auch die Papiermaschine würden einen besseren Wirkungsgrad erzielen, wenn der Arbeitsdruck in der Maschine erhöht werden könnte. The problem with this process of steam supply, however, is that the steam generating process causes a limitation of the steam working pressure. The TMP plant as well as the paper machine would achieve better efficiency if the working pressure in the machine could be increased.
Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung und eine Verfahren zur schaffen bei mit der /dem die Dampfversorgung einer technischen Anlage verbessert und energieeffizienter gestaltet werden kann. The invention is therefore an object of the invention to provide a device and a method for creating at the / the steam supply of a technical system can be improved and made more energy efficient.
Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen sind in den Unteransprüchen beschrieben. According to the invention the object is achieved by the features of claim 1. Advantageous embodiments are described in the subclaims.
Insbesondere Faserstoffbahnherstellungsmaschinen, wie z.B. Papiermaschinen verbrauchen bei der Herstellung der Faserstoffbahn sehr große Mengen Wasserdampf um die vielen Dampfverbraucher wie z.B. die Trockenzylinder zu versorgen. Ein Teil des benötigten Dampfes stammt üblicherweise aus Anlagenteilen in dem ein oder mehrere dampferzeugende Prozesse stattfinden wie z.B. in der TMP- Anlage. In particular, fibrous web making machines, such as e.g. Paper machines consume very large amounts of water vapor in the production of the fibrous web around the many steam consumers, such as e.g. to supply the drying cylinders. A portion of the steam required is usually from plant parts in which one or more steam-producing processes take place, e.g. in the TMP plant.
Die Dampfversorgung setzt sich somit aus zwei Komponenten zusammen, zum einen aus Dampf aus einer Dampferzeugungsvorrichtung mit ein oder mehreren Dampfkesseln, die den Arbeitsdampf mit einem Dampfdruck von PD2 erzeugt, und zum anderen aus Abwärmedampf aus den dampferzeugenden Prozessen, der einen Dampfdruck von PDi aufweist. The steam supply is thus composed of two components, on the one hand from steam from a steam generating device with one or more Steam boilers, which generates the working steam with a vapor pressure of P D 2, and on the other from waste heat from the steam generating processes, which has a vapor pressure of P D i.
Um den Dampfdruck PDi aus dem dampferzeugenden Prozess auf den benötigten Anlagen Dampfarbeitsdruck von PDS ZU erhöhen, weißt die erfindungsgemäße Vorrichtung einen Thermokompressor auf. In order to increase the steam pressure P D i from the steam-generating process to the required systems steam working pressure of PDS ZU, the device according to the invention has a thermocompressor.
Mit dem Thermokompressor wird der Abwärmedampf auf das gewünschte Niveau des Dampfarbeitsdruckes PD3 angehoben, so dass die Maschine bei optimalem Dampfdruckniveau arbeiten kann. Damit kann die Leistung der Faserstoffbahnher- stellungsmaschine gesteigert werden, wobei gleichzeitig auch die dampferzeugenden Prozesse mit optimalem Betriebsdruck betrieben werden können. With the thermocompressor, the waste heat steam is raised to the desired level of the steam working pressure PD3 so that the machine can operate at the optimum steam pressure level. Thus, the performance of the fibrous web manufacturing machine can be increased, while at the same time the steam-generating processes can be operated with optimum operating pressure.
Der Antrieb des Thermokompressors erfolgt vorzugsweise mittels Hochdruckdampf von der Dampferzeugungsvorrichtung. Der Abwärmedampf wird im Thermokompressor durch den Hochdruckdampf auf einen höheren Dampfdruck von 2,0 - 3,5 bar gebracht. Wobei der Dampfdruck Idealerweise auf 2,3 - 2,7 bar erhöht wird, da die meisten Dampfverbraucher in der Anlage bei 2,3 - 2,7 bar den besten Wirkungsgrad haben. The drive of the thermocompressor is preferably carried out by means of high-pressure steam from the steam generating device. The waste heat steam is brought in the thermocompressor by the high-pressure steam to a higher vapor pressure of 2.0 - 3.5 bar. Ideally, the steam pressure is increased to 2.3 - 2.7 bar, as most steam consumers in the system have the best efficiency at 2.3 - 2.7 bar.
Zur Regelung des Thermokompressors ist eine Druckregelung vorgesehen, die den Thermokompressor in Bezug auf den gemessenen Dampfdruck PDi des Abwärmedampfes regelt. To control the thermocompressor, a pressure control is provided which controls the thermocompressor in relation to the measured vapor pressure P D i of the waste heat vapor.
Der Arbeitsdampf aus der Dampferzeugungsvorrichtung und der Dampf aus dem Thermokompressor (4) werden anschließend in eine Dampfleitung zusammengeführt. The working steam from the steam generating device and the steam from the thermocompressor (4) are then merged into a steam line.
Wird Hochdruckdampf zur Anlagenversorgung verwendet, ist vorzugsweise eine Turbine vorgesehen, die den Hochdruckdampf auf den Arbeitsdampfdruck PD3 entspannt und dabei einen Generator zur Stromerzeugung antreibt. Bei dem bevorzugten Verfahren zur Dampfversorgung von technischen Anlagen, insbesondere Faserstoffbahnherstellungsmaschinen, wird zur Dampfversorgung eine Dampferzeugungsvorrichtung, die Arbeitsdampf mit einem Dampfdruck von PD3 erzeugt, und mindestens einem dampferzeugenden Prozess, der Abwärmedampf mit einem Dampfdruck von PDi erzeugt, verwendet. Wobei der Dampfdruck PDI aus den dampferzeugenden Prozessen vor dem zusammenführen mit dem Arbeitsdampf auf den in der Anlage benötigten Dampfversorgungsdruck von PD3 erhöht wird. If high-pressure steam is used to supply the system, a turbine is preferably provided which relaxes the high-pressure steam to the working steam pressure P D 3 and thereby drives a generator for power generation. In the preferred method for steam supply of technical equipment, in particular a fibrous web forming machine, for steam supply and a steam generating device that generates the working steam with a vapor pressure of PD3, produces at least one steam-generating process, the heat recovery steam with a vapor pressure of P D i, is used. The vapor pressure PDI from the steam-producing processes before being combined with the working steam is increased to the steam supply pressure of P D 3 required in the plant.
Dabei wird der Abwärmedampfdruck PDi aus dem dampferzeugenden Prozess vorzugsweise mittels eines Thermokompressors auf den in der Anlage benötigten Dampfversorgungsdruck von PD3 erhöht. In this case, the waste heat steam pressure P D i from the steam-generating process is preferably increased by means of a thermocompressor to the steam supply pressure of P D 3 required in the system.
Zudem ist es sehr Vorteilhaft, wenn der Thermokompressor mittels einer Druckregelung geregelt wird, die den Thermokompressor in Bezug zum gemessenen Dampfdruck PDi regelt. In addition, it is very advantageous if the thermocompressor is controlled by means of a pressure control, which regulates the thermocompressor in relation to the measured vapor pressure P D i.
Mit dem erfindungsgemäßen Dampfversorgungssystem können Druckschwankungen verhindert und Arbeitsdamfdruck auf das gewünschte Niveau angehoben werden. With the steam supply system according to the invention, pressure fluctuations can be prevented and working steam pressure can be raised to the desired level.
Die erfindungsgemäße Lösung wird nachfolgend anhand von Figuren erläutert. Darin ist im Einzelnen Folgendes dargestellt: The solution according to the invention is explained below with reference to figures. It details the following:
Figur 1 den Aufbau eines Systems entsprechend dem Stand der Technik;Figure 1 shows the structure of a system according to the prior art;
Figur 2 den Aufbau einer ersten Variante eines erfinddungsgemäßen Systems; FIG. 2 shows the structure of a first variant of a system according to the invention;
Figur 3 den Aufbau einer zweiten Variante eines erfinddungsgemäßen Figure 3 shows the structure of a second variant of an inventive
Systems; system;
Figur 4 Symbolerklärung gemäß DIN 2481 ; Die Figur 1 zeigt den Aufbau eines Systems zur Versorgung einer Papiermaschine mit Arbeitsdampf entsprechend dem Stand der Technik. Das System umfasst zwei Dampfquellen 2, 5 aus denen ein Gemisch gebildet wird, dass der Papiermaschine als Arbeitsdampf 3 zur Verfügung gestellt wird. Figure 4 Symbol explanation according to DIN 2481; 1 shows the structure of a system for supplying a paper machine with working steam according to the prior art. The system comprises two steam sources 2, 5 from which a mixture is formed, which is made available to the paper machine as working steam 3.
Bei dieser Ausführung kann der Arbeitsdruck maximal den Druck des Abwärmedampfes aufweisen und Abwärmedampfdruckschwankungen können nur schlecht ausgeglichen werden. In this embodiment, the working pressure may have a maximum of the pressure of the waste heat vapor and Abwärmmedampfdruckschwankungen can be compensated only bad.
Die Figur 2 verdeutlicht den Aufbau einer ersten Variante eines erfindungsgemäßen Systems zur Dampfversorgung einer Papier- oder Faserbahnherstellungsma- schine 1 1 . FIG. 2 illustrates the construction of a first variant of a system according to the invention for supplying steam to a paper or fiber web production machine 11.
Der bei der Faseraufbereitung im der TMP-Anlage anfallende Abwärmedampf 2 wird durch einen Dampftrockner 8 mit einem Wasserabscheider 9 geleitet und dabei entwässert. Der nun trockene Abwärmedampf 2 wird anschließend dem Thermokompressor 4 zugeführt. Im Thermokompressor 4 wird der Druck des Abwärmedampfes 2 mit Hilfe eines Treibmediums derart erhöht, dass der Dampfdruck gleich dem des gewünschten Arbeitsdampfes 3 ist. Als Treibmedium kann z.B. Hochdruckdampf 1 verwendet werden. Es ist aber auch Denkbar, dass Niederdruckdampf verwendet wird, wobei ein entsprechender Dampfdruckunterschied vorhanden sein muss, um den Thermokompressor 4 wirtschaftlich zu betreiben. Zur Regelung des Prozesses ist eine Druckregelung 7 vorgesehen. The resulting in the fiber processing in the TMP plant waste heat steam 2 is passed through a steam dryer 8 with a water separator 9 and thereby dehydrated. The now dry waste heat steam 2 is then fed to the thermocompressor 4. In the thermocompressor 4, the pressure of the waste heat steam 2 is increased by means of a propellant medium such that the vapor pressure is equal to that of the desired working vapor 3. As a driving medium, e.g. High pressure steam 1 can be used. But it is also conceivable that low-pressure steam is used, with a corresponding difference in vapor pressure must be present in order to operate the thermocompressor 4 economically. To regulate the process, a pressure control 7 is provided.
Um die benötigten Dampfmengen für die Papiermaschine 1 1 zur Verfügung zur stellen, muss dem Arbeitsdampf 3 aus dem Thermokompressor Frischdampf 5 mit einen Frischdampfdruck PD2, der dem Arbeitsdampfdruck PD3 entspricht, zugeführt werden. In order to provide the required amounts of steam for the paper machine 1 1, the working steam 3 from the thermo-compressor live steam 5 with a live steam pressure P D 2, which corresponds to the working steam pressure P D 3, must be supplied.
Zur Regelung der Frischdampfzufuhr ist eine entsprechende Regelung vorgesehen. For regulating the live steam supply, a corresponding regulation is provided.
Die Figur 3 verdeutlicht den Aufbau einer zweiten Variante eines erfindungsgemäßen Systems zur Dampfversorgung einer Papier- oder Faserbahnherstel- lungsmaschine 1 1 . Im Wesentlichen entspricht dieses System dem in Fig.2 dargestellten und beschriebenen System. FIG. 3 illustrates the structure of a second variant of a system according to the invention for supplying steam to a paper or fiber web production machine 11. In essence, this system corresponds to the system shown and described in FIG.
Der Unterschied besteht darin, dass der Frischdampf 6 mit dem Frischdampfdruck PD2 durch das entspannen des Hochdruckdampfes 1 in der Turbine 13 auf das richtige Druckniveau des Arbeitsdampfdruckes PD2 gebracht wird. The difference is that the live steam 6 is brought to the proper pressure level of the working steam pressure PD2 by the live steam pressure PD2 by relaxing the high-pressure steam 1 in the turbine 13.
Die Figuren 4 sind Symbolerklärungen für sämtliche Zeichnungen von 1 bis 4 gemäß DIN 2481 -Waermekraftanlagen angegeben. Figures 4 are symbol explanations for all drawings from 1 to 4 according to DIN 2481 -Waermekraftanlagen specified.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Hochdruckdampf1 high pressure steam
2 Abwärmedampf 2 waste heat steam
3 Arbeitsdampf 3 working steam
Thermokompressor thermal compressor
5 Frischdampf 5 live steam
6 Frischdampf aus Turbine 6 live steam from turbine
7 Druckreglung 7 pressure control
8 Dampftrockner 8 steam dryer
9 Wasserabscheider 9 water separators
10 Dampfleitung 10 steam line
1 1 Papiermaschine 1 1 paper machine
12 Kondensatabfuhr 12 condensate removal
13 Turbine 13 turbine
PDi AbwärmedampfdruckP D i waste heat vapor pressure
PD2 Frischdampfdruck P D 2 live steam pressure
PD3 ArbeitsdampfdruckP D 3 working steam pressure
PD4 Hochdruckdampfdruck P D4 high pressure steam pressure
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200910045203 DE102009045203A1 (en) | 2009-09-30 | 2009-09-30 | Steam pressure control |
| DE102009045203.6 | 2009-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011039056A1 true WO2011039056A1 (en) | 2011-04-07 |
Family
ID=43016604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2010/063592 Ceased WO2011039056A1 (en) | 2009-09-30 | 2010-09-16 | Steam pressure controller |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102009045203A1 (en) |
| WO (1) | WO2011039056A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4447964A (en) * | 1981-11-23 | 1984-05-15 | Gardner Thomas A | Dryer drainage by recirculation with primary and secondary dryers |
| US4522035A (en) * | 1981-01-23 | 1985-06-11 | Techmark Corporation | Method and apparatus for recovering waste energy |
| WO2001027388A1 (en) * | 1999-10-08 | 2001-04-19 | Stora Enso Ab | Method and device for supplying steam to the drying section in a papermaking machine |
| DE102008000227A1 (en) * | 2008-02-04 | 2009-08-06 | Voith Patent Gmbh | Device for supplying heating group with vaporous medium for printing machine, has thermal compressor increasing pressure of drift medium expanded in pressure chamber so that steam is again supplied to pressure chamber |
-
2009
- 2009-09-30 DE DE200910045203 patent/DE102009045203A1/en not_active Withdrawn
-
2010
- 2010-09-16 WO PCT/EP2010/063592 patent/WO2011039056A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4522035A (en) * | 1981-01-23 | 1985-06-11 | Techmark Corporation | Method and apparatus for recovering waste energy |
| US4447964A (en) * | 1981-11-23 | 1984-05-15 | Gardner Thomas A | Dryer drainage by recirculation with primary and secondary dryers |
| WO2001027388A1 (en) * | 1999-10-08 | 2001-04-19 | Stora Enso Ab | Method and device for supplying steam to the drying section in a papermaking machine |
| DE102008000227A1 (en) * | 2008-02-04 | 2009-08-06 | Voith Patent Gmbh | Device for supplying heating group with vaporous medium for printing machine, has thermal compressor increasing pressure of drift medium expanded in pressure chamber so that steam is again supplied to pressure chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102009045203A1 (en) | 2011-03-31 |
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