EP0622586B1 - Verfahren zum Betreiben einer Rohrleitung und Vorrichtung zur Durchführung des Verfahrens - Google Patents
Verfahren zum Betreiben einer Rohrleitung und Vorrichtung zur Durchführung des Verfahrens Download PDFInfo
- Publication number
- EP0622586B1 EP0622586B1 EP94106367A EP94106367A EP0622586B1 EP 0622586 B1 EP0622586 B1 EP 0622586B1 EP 94106367 A EP94106367 A EP 94106367A EP 94106367 A EP94106367 A EP 94106367A EP 0622586 B1 EP0622586 B1 EP 0622586B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flow
- bypass line
- flow resistance
- heat exchanger
- actuator
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000008367 deionised water Substances 0.000 claims abstract description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 2
- 230000008859 change Effects 0.000 abstract description 6
- 230000009467 reduction Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
Definitions
- the invention relates to a method for operating a apparatus provided with a bypass line, e.g. Heat exchanger for flowing media, preferably for water, deionized water or condensate, which media at least in the partial flow flow through the bypass line, and a device for Execution of the procedure.
- a bypass line e.g. Heat exchanger for flowing media, preferably for water, deionized water or condensate, which media at least in the partial flow flow through the bypass line, and a device for Execution of the procedure.
- the problem described above can also occur if due to an accident Interruption of the volume flow, e.g. due to pump failure or malfunction a pipeline shut-off in the previous pipeline section, the promotion the medium is temporarily omitted.
- this can happen in the heat exchanger for the reasons described above located medium evaporated, which has the consequence that through the formation of vapor bubbles in the heat exchanger whose resistance to the flow is so great that the flow comes to a standstill here.
- the flow resistance is the following arrangement referred to as a circuit of the heat exchanger Bypass line lower in the pipeline. It can happen that a Circuit arrangement that operates stably at a high total current is now unstable will, d. H. that the effects described above occur.
- the characteristic features are used to achieve the object of claim 1. It is provided that when reducing of the volume flow of the medium an increase in the flow resistance in Apparatus occurs, the division of the partial flows is changed in that the flow resistance in the bypass line is increased so that the apparatus is sufficient is fed with flow medium.
- the flow resistance in the bypass line is variably adjustable so that it is always the same as the flow resistance of the Apparatus. This ensures that the apparatus is sufficiently fluid is fed, so that there are undesirable partial or full evaporation, which increase the flow resistance of the apparatus, avoided or at least be overcome.
- the partial flow through the bypass line is interrupted as soon as in the apparatus an increased flow resistance occurs.
- This variant requires little circuitry or measurement and control engineering effort and is therefore easy and inexpensive to implement.
- a stepless one Change in the division of the partial flows and thus a change in the flow resistance to make the required process parameters in this way to comply as best as possible, d. H. the flow rate of the flowing To regulate the medium through the apparatus.
- a continuous change of the flow cross section of the bypass line is compared to the first Variant more complex, but also with regard to the operation of the circuit arrangement cheaper.
- the flow resistance of the bypass line also increased when the flow resistance of the apparatus is increased.
- a known device for performing the method mentioned in the introduction contains an apparatus, preferably a heat exchanger, with a bypass line is provided, in which an actuator for changing the Flow resistance of the bypass line is arranged.
- a solution of the The object underlying the invention is according to the invention through the features of the characterizing part of claim 3. After that is provided that the actuator is integrated in a measuring and control system and is controlled so that when the volume flow is reduced of the medium an increase in the flow resistance in the heat exchanger occurs, the flow resistance in the bypass line increased so that it is equal the flow resistance in the heat exchanger or exceeds it, so the heat exchanger is sufficiently supplied with medium.
- the actuator is a control valve educated. This allows a continuous adjustment of the flow cross section the bypass line and thus its flow resistance.
- the actuator can be expedient trained as a gate valve.
- the sole figure shows a circuit arrangement according to the invention.
- a circuit arrangement 10 is shown in the single figure, which has a pipeline 12 in which a as Heat exchanger trained apparatus 14 is arranged, the is provided with a bypass line 16.
- this bypass line is an actuator according to the invention 18 arranged, the motor-driven in the example shown Shut-off valve is shown and in concrete use as a gate valve, throttle valve or control valve can be trained.
- the total volume flow is divided accordingly the setting of the actuator 18 in the same Ratio like at full load.
- This can lead to instabilities lead to the flow, since it heats up the flowing Medium-serving apparatus 14 initially unchanged with heating medium is fed, but the amount of heat to the Volume flow flowing through full load operation is coordinated. Because of this excess supply of heat, it comes in the apparatus 14 for rapid heating of the flowing medium and finally to its evaporation.
- the invention employs the flow resistance in the bypass line by adjusting the actuator 18 is increased so far that he the flow resistance in the apparatus exceeds 14, so that the current flow pressure expels the vapor bubbles in the apparatus 14 and trouble-free part-load operation is possible. Around to ensure the latter, it may be necessary to To change the setting of the actuator 18 again.
- Procedure according to the invention for use by the Flow resistance in the bypass line 16 by changing the setting of the actuator 18 is increased so far that it prevails in apparatus 14 due to vapor bubble formation Flow resistance exceeds. This will achieved that the flowing medium is now due to the upcoming Pressure displaces the vapor bubbles from the apparatus 14 and thereby its flow resistance again brings the initial value. Once that is done, will the setting value of the actuator 18 is changed again and adjusted to these operating conditions.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Flow Control (AREA)
- Pipeline Systems (AREA)
- Treatment Of Water By Ion Exchange (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Air Transport Of Granular Materials (AREA)
Description
Claims (6)
- Verfahren zum Betreiben eines mit einer Bypassleitung versehenen Apparats, z. B. Wärmetauscher für strömende Medien, vorzugsweise für Wasser, Deionat oder Kondensat, welche Medien zumindest im Teilstrom die Bypassleitung durchströmen, dadurch gekennzeichnet, daß dann, wenn bei Verringerung des Volumenstromes des Mediums eine Erhöhung des Strömungswiderstands im Apparat auftritt, die Aufteilung der Teilströme dadurch geändert wird, daß der Strömungswiderstand in der Bypassleitung so erhöht wird, daß der Apparat ausreichend mit Strömungsmedium gespeist wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Teilstrom durch die Bypassleitung unterbrochen wird, wenn im Apparat infolge erhöhten Strömungswiderstandes ein Strömungsstillstand auftritt.
- Vorrichtung zur Durchführung des Verfahrens nach einem der Ansprüche 1 oder 2, mit einem Wärmetauscher (14), einer Bypassleitung (16) für den Wärmetauscher und einem in der Bypassleitung (16) vorgesehenen Stellglied (18) zur Veränderung des Strömungswiderstands der Bypassleitung (16), dadurch gekennzeichnet, daß das Stellglied (18) in eine Meß- und Regelstrecke eingebunden und so gesteuert ist, daß es dann, wenn bei Verringerung des Volumenstroms des Mediums eine Erhöhung des Strömungswiderstands im Wärmetauscher (14) auftritt, den Strömungswiderstand in der Bypassleitung (16) so erhöht, daß er gleich dem Strömungswiderstand im Wärmetauscher (14) ist oder diesen übersteigt, damit der Wärmetauscher ausreichend mit Medium gespeist wird.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Stellglied (18) ein Regelventil ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Stellglied (18) ein Absperrschieber ist.
- Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Stellglied (18) eine Drosselklappe ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4314390 | 1993-04-30 | ||
| DE4314390A DE4314390C2 (de) | 1993-04-30 | 1993-04-30 | Verfahren zum Betreiben eines hydraulischen Systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0622586A1 EP0622586A1 (de) | 1994-11-02 |
| EP0622586B1 true EP0622586B1 (de) | 1998-09-09 |
Family
ID=6486902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94106367A Expired - Lifetime EP0622586B1 (de) | 1993-04-30 | 1994-04-23 | Verfahren zum Betreiben einer Rohrleitung und Vorrichtung zur Durchführung des Verfahrens |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0622586B1 (de) |
| AT (1) | ATE170966T1 (de) |
| DE (2) | DE4314390C2 (de) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE498511C (de) * | 1928-04-13 | 1930-06-02 | Escher Wyss Maschf Ag | Sicherheitsvorrichtung fuer Waermeaustauschvorrichtungen |
| US2823650A (en) * | 1951-02-06 | 1958-02-18 | Svenska Maskinverken Ab | Method and means for heat exchange between flowing media, preferably for remote heating systems |
| DE1117602B (de) * | 1958-05-12 | 1961-11-23 | Sulzer Ag | Anordnung zur Speisewasservorwaermung mittels Dampf |
| DE1163866B (de) * | 1960-12-03 | 1964-02-27 | Sempell Rhein Armaturen | Waermeaustauscher-Absicherung durch Schnellschlussventile |
| DE1985808U (de) * | 1968-03-01 | 1968-05-22 | Fischer Ag Georg | Drosselstueck fuer rohrleitungen, insbesondere leitungsverzweigungen. |
| DE6812627U (de) * | 1968-12-20 | 1969-04-24 | Moehrlin Ges Mit Berschraenkte | Rohrstueck mit drosselstelle zum einbau in fluessigkeitsdurchstroemte leitungen |
| DE2244314A1 (de) * | 1972-09-09 | 1974-03-14 | Alexei Dipl Ing Andjulovici | Einrichtung zum konstanthalten des hydraulischen widerstandes in einem fluessigkeitsnetz |
| US4841722A (en) * | 1983-08-26 | 1989-06-27 | General Electric Company | Dual fuel, pressure combined cycle |
| DE3539621A1 (de) * | 1985-04-03 | 1986-10-16 | Heinz 2300 Kiel Behrens | Zweiwegregelung eines gasfoermigen mediums in rohrleitungen mit einem reaktionsraum |
| US4653524A (en) * | 1985-12-16 | 1987-03-31 | Wilson Warren M | Control valve assembly |
| DE4031207C2 (de) * | 1990-10-04 | 2000-03-09 | Grohe Armaturen Friedrich | Wassermischventil |
| DE4112057A1 (de) * | 1991-04-12 | 1992-10-15 | Oventrop Sohn Kg F W | Thermostatisch gesteuertes dreiwegeventil fuer einrohrheizungsanlagen |
-
1993
- 1993-04-30 DE DE4314390A patent/DE4314390C2/de not_active Expired - Fee Related
-
1994
- 1994-04-23 DE DE59406860T patent/DE59406860D1/de not_active Expired - Fee Related
- 1994-04-23 EP EP94106367A patent/EP0622586B1/de not_active Expired - Lifetime
- 1994-04-23 AT AT94106367T patent/ATE170966T1/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE59406860D1 (de) | 1998-10-15 |
| EP0622586A1 (de) | 1994-11-02 |
| DE4314390C2 (de) | 1997-01-30 |
| DE4314390A1 (de) | 1994-11-03 |
| ATE170966T1 (de) | 1998-09-15 |
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