DE741418C - Pipe arrangement, especially for superheaters - Google Patents

Pipe arrangement, especially for superheaters

Info

Publication number
DE741418C
DE741418C DED84894D DED0084894D DE741418C DE 741418 C DE741418 C DE 741418C DE D84894 D DED84894 D DE D84894D DE D0084894 D DED0084894 D DE D0084894D DE 741418 C DE741418 C DE 741418C
Authority
DE
Germany
Prior art keywords
pipe
pipe arrangement
flow
axial length
superheaters
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
Application number
DED84894D
Other languages
German (de)
Inventor
Alfred Strecker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsche Babcock and Wilcox Dampfkesselwerke AG
Original Assignee
Deutsche Babcock and Wilcox Dampfkesselwerke AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Deutsche Babcock and Wilcox Dampfkesselwerke AG filed Critical Deutsche Babcock and Wilcox Dampfkesselwerke AG
Priority to DED84894D priority Critical patent/DE741418C/en
Application granted granted Critical
Publication of DE741418C publication Critical patent/DE741418C/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
    • F22G3/001—Steam tube arrangements not dependent of location
    • F22G3/002—Steam tube arrangements not dependent of location with helical steam tubes

Description

Rohranordnung, insbesondere für Überhitzer Die Erfindung betrifft eine Rohranordnung, insbesondere für Überhitzen bestehend aus mehreren schrau.benfö:rmiggewickeltenRohren, welche mit parallelen Schraubenachsen nebeneinander und hintereinander im Heizgasstrom angeordnet sind, und besteht darin, daß in der Strömungsrichtung der Gase die axiale Länge der von den Heizgasen quer heaufschlagten Rohrschrauben oder bei gleicher axialer Länge die Steigung ab- oder zunimmt.Pipe assembly, particularly for superheaters The invention relates to a pipe arrangement, especially for overheating, consisting of several screw-shaped pipes, which with parallel screw axes next to each other and one behind the other in the heating gas flow are arranged, and consists in that in the flow direction of the gases, the axial Length of the pipe bolts that are pushed across by the heating gases or the same axial length the slope decreases or increases.

Bei Anordnung von Schraubenrohren als Berührungsrohrbündel muß häufig auf verschiedenartige Nebenbedingungen Rücksicht genommen werden. Wenn die Strömungsrichtung senkrecht zur Schraubenachse ist, können sie auch in den meisten Fällen erfüllt werden. Soll z. B. die Strömungsgeschwindigkeit der Heizgase trotz der eintretenden Gasabkühlung nicht verändert werden, so, ist dies dadurch erreichbar, daß die axiale Länge der Rohrschrauben in der Gasströmungsrichtung abnimmt. Wird dazu noch die Forderung gestellt, daß die gesamte Wärmeaufnahme je Rohr gleichbleiben soll, so, kann mit oder ohne Veränderung der Achslänge die Heizfläche dadurch vergrößert «erden, daß in der Gasströmii,ngsi-chtung die Schraubensteigung abnimmt. Damit durch die Hintereinanderschaltung so ungleicher Rohre die Strömungsverteilung in den Rohren nicht leidet, ist es vorteilhaft, jeweils die Rohrgruppen mit den kürzesten und den längsten Rohren hintereinanderzus:chahen.When arranging screw tubes as a contact tube bundle, various secondary conditions must often be taken into account. If the direction of flow is perpendicular to the screw axis, they can also be met in most cases. Should z. If, for example, the flow rate of the heating gases cannot be changed despite the gas cooling that occurs, this can be achieved in that the axial length of the pipe screws decreases in the direction of gas flow. If, in addition, the requirement is made that the total heat absorption per pipe should remain the same, the heating surface can be enlarged with or without changing the axial length by decreasing the pitch of the screw in the direction of the gas flow. So that the flow distribution in the pipes does not suffer from the series connection of such unequal pipes, it is advantageous to put the pipe groups with the shortest and the longest pipes one behind the other.

Es kann auch die Forderung gestellt sein, daß in der Richtung des Heiz:gasstromes die Gasgeschwindigkeit abnehmen soll, um Flugasche auszuscheiden. Dann ist die Umkehrung der vorher genannten Maßnahme angebracht.There can also be a requirement that in the direction of the Heating: the gas flow should decrease the gas velocity in order to separate fly ash. Then the reverse of the aforementioned measure is appropriate.

Es ist bei Rippenrohrheizkörp.ern mit quer angeströmten Rohren bekannt, in der Gasströmungsrichtung die Rohrlänge, die Rippenteileng oder die Rippenstärke zu ändern, um die Gasgeschwindigkeit zu beeinflussen. Bci Rippenrohren ist es jedoch viel leichter, den gestellten Aufgaben gerecht zu werden, weil die Veränderu-ng an den Rippen, wie Größe, Dicke, Teilung, die Strömung in den Rohren nicht stark be einflußt.It is known for finned tube heaters with cross-flow tubes, in the gas flow direction the pipe length, the fin parts or the fin thickness change to affect the gas velocity. Bci finned tubes, however, are much easier to do justice to the set tasks, because the change on the ribs, such as size, thickness, division, the flow in the pipes not strong influenced.

In der Abbildung ist die Ansicht eines gemäß der Erfindung ausgebildeten Rohrbündels dargestellt, bei welchem die Strömungsgeschwindigkeit der Heizgase in der Strömungsrichtung abnehmen soll, um das Ausfallen der Flugasche zu erleichtern. Die Rohrgruppen i und .4 bzw. a und ä sind hintereinandergeschaltet, um den Einfluß der verschiedenen Bcheizung auszugleichen.In the figure is a view of a formed according to the invention Tube bundle shown, in which the flow rate of the heating gases in should decrease in the direction of flow in order to facilitate the precipitation of the fly ash. The pipe groups i and .4 or a and ä are connected in series to reduce the influence to compensate for the different tempering.

Claims (1)

PATENTANSPRÜCHE: i. Rohranordnung@insbesondere für überhitzer, bestehend aus mehreren schraubenförmig gewickelten Rohren, welche mit parallelen Schraubenachsen nebeneinander und hintereinander im H ,izgasstrom angeordnet sind, dadurch gekennzeichnet, daß in der Strömungsrichtung der Gase die axiale Länge der von den Gasen quer beaufschlagten Rahrs-chrauben zu- oder abnänmt oder bei gleicher axialer Länge die Steigung ab- oder zunimmt. a. Rohranordnung nach Anspruch i, dadurch gekennzeichnet, daß bei Hintereinanderschaltung von Rohrgruppen die längsten mit den kürzesten Rohrgruppen hintereinanderg eschaltet werden. Zur Abgrenzung des Anmeldungsgegenstandes vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden: deutsche Patentschrift ....... :\r. 55664i; französische Patentschrift .. . . - 574 96i.PATENT CLAIMS: i. Pipe arrangement @ in particular for superheaters, consisting from several helically wound tubes, which with parallel screw axes are arranged side by side and one behind the other in the hydrogen gas flow, characterized in that that in the direction of flow of the gases, the axial length of the transversely acted upon by the gases Rahrs screw increases or decreases or the pitch decreases with the same axial length. or increases. a. Pipe arrangement according to claim i, characterized in that at Series connection of pipe groups the longest with the shortest pipe groups can be switched one after the other. To delimit the subject of the application from The following publications are considered state of the art in the granting procedure been drawn: German patent specification .......: \ r. 55664i; French patent specification ... . - 574 96i.
DED84894D 1941-04-22 1941-04-22 Pipe arrangement, especially for superheaters Expired DE741418C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED84894D DE741418C (en) 1941-04-22 1941-04-22 Pipe arrangement, especially for superheaters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED84894D DE741418C (en) 1941-04-22 1941-04-22 Pipe arrangement, especially for superheaters

Publications (1)

Publication Number Publication Date
DE741418C true DE741418C (en) 1943-11-11

Family

ID=7064181

Family Applications (1)

Application Number Title Priority Date Filing Date
DED84894D Expired DE741418C (en) 1941-04-22 1941-04-22 Pipe arrangement, especially for superheaters

Country Status (1)

Country Link
DE (1) DE741418C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2499375A (en) * 2012-01-31 2013-08-21 Clean Thermodynamic Energy Conversion Ltd Steam generator with coiled superheaters
US9952003B2 (en) 2012-01-31 2018-04-24 Clean Thermodynamic Energy Conversion Ltd Steam generation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR574961A (en) * 1923-12-26 1924-07-22 Improvement in the construction or provision of heaters-economizers
DE556641C (en) * 1930-02-13 1932-08-12 Maschf Augsburg Nuernberg Ag Coiled pipe system arranged in a fire gas flue

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR574961A (en) * 1923-12-26 1924-07-22 Improvement in the construction or provision of heaters-economizers
DE556641C (en) * 1930-02-13 1932-08-12 Maschf Augsburg Nuernberg Ag Coiled pipe system arranged in a fire gas flue

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2499375A (en) * 2012-01-31 2013-08-21 Clean Thermodynamic Energy Conversion Ltd Steam generator with coiled superheaters
GB2499375B (en) * 2012-01-31 2016-06-22 Clean Thermodynamic Energy Conv Ltd Superheated fluid generation
US9952003B2 (en) 2012-01-31 2018-04-24 Clean Thermodynamic Energy Conversion Ltd Steam generation
US10845131B2 (en) 2012-01-31 2020-11-24 Clean Thermodynamic Energy Conversion Ltd Steam generation

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