DE702811C

DE702811C - Forced current steam generator with radiation and contact heating surface

Info

Publication number: DE702811C
Application number: DE1936G0092589
Authority: DE
Original assignee: HERPEN CO KG LA MONT KESSEL
Current assignee: HERPEN CO KG LA MONT KESSEL
Priority date: 1936-04-02
Filing date: 1936-04-02
Publication date: 1941-02-17

Description

Die Erfindung erstreckt sich auf Dampferzeuger mit zwangmäßigem Wasserfluß, dessen Heizfläche in durch Strahlung und Berührung beheizte Rohrgruppen unterteilt ist. Bei ' solchenDampferzeugern besteht die Schwierigkeit, eine der Dampferzeugung in den einzelnen Rohrgruppen entsprechende Wasserverteilung der zwangmäßig geförderten Verdampfungsflüssigkeit bei allen Belastungen zu erreichen. The invention extends to steam generators with forced water flow, the Heating surface is divided into tube groups heated by radiation and contact. at 'Such steam generators have the difficulty of producing steam in the individual Pipe groups corresponding water distribution of the forced evaporation liquid to be reached under all loads.

Diese Schwierigkeit soll erfindungsgemäß dadurch beseitigt werden, daß für die Strahlungs- und Berührungsheizfläche getrennte Zwangströme vorgesehen sind.
Man hat schon vorgeschlagen, für einzelne in verschiedenem Temperaturgebiet liegende Rohrstränge, die durch Berührung beheizt werden, getrennte Umwälzpumpen vorzusehen. Diese durch Berührung beheizten Rohrgruppen haben wohl verschieden hohe Wärmeaufnahme; der verhältnismäßige Anteil ihrer Wärmeaufnahme ändert sich mit der Belastung aber nicht wesentlich, da alle Rohrgruppen durch Berührung beheizt werden. Anders lie- gea die Verhältnisse jedoch, wenn die Heizfläche in durch Strahlung und Berührung beheizte Rohrgruppen unterteilt ist. Bei der durch Strahlung beheizten Rohrgruppe nimmt mit sinkender Belastung des Dampferzeugers die anteilmäßige Dampfleistung zu, während bei der durch Berührung beheizten Rohrgruppe die anteilmäßige Dampfleistung abnimmt. Mit der Laständerung verschiebt sich demnach die notwendige Verteilung in entgegengesetztem Sinne. Durch getrennten Zwangstrom für Strahlungs- und Berührungsheizfläche wird dagegen der große Vorteil erzielt, daß keine gegenseitige Beeinflussung eintritt und für jeden der Zwangströme die gewünschte Veränderung der Fördermenge bei Lastwechsel vorgenommen werden kann.According to the invention, this difficulty is to be eliminated in that separate forced currents are provided for the radiant and contact heating surfaces.
It has already been proposed to provide separate circulating pumps for individual pipe strings in different temperature ranges which are heated by contact. These tube groups, which are heated by contact, have different levels of heat absorption; the proportion of their heat absorption does not change significantly with the load, however, since all tube groups are heated by touch. However, unlike Lie gea the conditions when the heating surface is divided into heated by radiation and contact tube groups. In the case of the tube group heated by radiation, the proportionate steam output increases as the load on the steam generator decreases, while in the case of the tube group heated by contact, the proportionate steam output decreases. With the change in load, the necessary distribution shifts in the opposite sense. By contrast, separate forced currents for radiant and contact heating surfaces achieve the great advantage that no mutual interference occurs and the desired change in the delivery rate can be made for each of the forced currents in the event of load changes.

Für die getrennten Zwangströme kann eine besondere Fördereinrichtung vorgesehen oder es kann eine Fördereinrichtung gewählt werden, die gemeinsamen Zufluß der Verdampfungsflüssigkeit hat und voneinander unabhängige Fördereinrichtungen besitzt.A special conveying device can or can be provided for the separate forced flows a conveying device can be selected, the common inflow of the evaporation liquid and has independent funding institutions.

Die Erfindung wird an einem Ausführungsbeispiel an Hand der Zeichnungen nachstehend näher beschrieben.The invention is illustrated below using an exemplary embodiment with reference to the drawings described in more detail.

Abb. r zeigt einen Dampferzeuger, der aus Strahlungs- und Berührungsfläche besteht. Es handelt sich hier um einen Dampferzeuger mit zwangmäßigem Wasserumlauf.Fig. R shows a steam generator that consists of a radiation and a contact surface. It This is a steam generator with forced water circulation.

Von der Trommel 1 läuft das Wasser zu den Umwälzpumpen 2 und 3. Die Umwälzpumpe 2 drückt das Wasser durch die Strahlungsheizfläche, die aus den Rohren 4 und S besteht. Die Rohre 4 münden unmittelbar wieder in die Trommel 1 und leiten hier das entstandene Dampf-Wasser-Gemisch ein. Die Rohre 5 sind am Sammler 6 angeschlossen. Vom Sammler 6 wird das Dampf-Wasser-Gemisch durch Leitung 7 in die Trommel ge-The water runs from drum 1 to circulating pumps 2 and 3. The circulating pump 2 pushes the water through the radiant heating surface, which comes from the pipes 4 and S. consists. The pipes 4 lead directly back into the drum 1 and conduct the here resulting steam-water mixture. The pipes 5 are connected to the collector 6. From the collector 6, the steam-water mixture is fed into the drum through line 7.

Claims

leads. From the pump 3 the water is conveyed through line 8 into the distributor 9 of the contact heating surface 10 pressed. The steam-water mixture created in the contact heating surface is returned from the collector 11 through line 12 to the drum 1.

In the embodiment according to Fig. 1

the flame develops from the burner 13, which rises in the combustion chamber and enters the

»0 stirrer heating surface 10 enters. A superheater can be located between the contact heating surface 10 14 be installed. The flue gases then also enter the downstream heating surface 15.

The feed pump 21 presses the feed water

'5 through the heating surface 15 into the drum 1.

Instead of the two independent circuits shown in Fig. 1, you can also several are provided, according to the invention, the heating surface groups of the individual Circuits should lie either in the radiation part or in the contact part of the heating surface.

In the example shown in Fig. 1, each pump has its own particular drive. One can both pumps are also provided with a common drive in a known manner; this has the Advantage that the changes in the power requirement that occur when the load changes of the individual pumps approximately equalize, so that the prime mover always approximates is equally charged.

If two separate pumps are provided

it is advantageous to connect the pressure lines of both pumps to one another, so that if one pump fails, the other serves as a reserve for this group of heating surfaces.

Instead of the separate circulation pumps, you can also choose a common one, the separate one Has pressure port. Fig. 2 shows an embodiment for this. The liquid flows through suction port 16 to. The pump has two impellers 17 seated on a common shaft and 18, which feed the water into the separate pressure ports 19 and 20 assigned to them support financially. Such a pump has the advantage of the largest, especially for smaller units Simplicity. Instead of the two separate wheels shown, you can also run several of them.

It is advisable to install control devices in the individual pressure lines, see above that one z. B. when changing the fuel also the water supply to the Strahlungsund Can change the contact heating surface.

In the chosen embodiment, a steam generator with a compulsory Water circulation shown; however, the invention also extends to steam generators forced flow or circulation of any working medium.

Pa τεν tanspruc ηε:

ι. Forced current steam generator with radiant and contact heating surface, characterized in that for the radiant heating surface (4, s) and the touch heating surface (10) separate forced currents for a common Work equipment is provided.

2. Steam generator according to claim 1, characterized in that for the individual Heating surface groups (4, 5 and 10) different pumps with common Drive are provided.

3. Steam generator according to claim 1, characterized in that the pressure · lines of the separate forced currents are connected to each other, so that in the event of failure one conveying device, the heating surface group can be supplied with liquid from the other conveying device can.

1 sheet of drawings