DE755389C - Process to prevent salt build-up in turbines and superheaters - Google Patents

Process to prevent salt build-up in turbines and superheaters

Info

Publication number
DE755389C
DE755389C DEI55713D DEI0055713D DE755389C DE 755389 C DE755389 C DE 755389C DE I55713 D DEI55713 D DE I55713D DE I0055713 D DEI0055713 D DE I0055713D DE 755389 C DE755389 C DE 755389C
Authority
DE
Germany
Prior art keywords
superheaters
turbines
boiler
water
sodium hydroxide
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
DEI55713D
Other languages
German (de)
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI55713D priority Critical patent/DE755389C/en
Application granted granted Critical
Publication of DE755389C publication Critical patent/DE755389C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/083Mineral agents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)

Description

Verfahren zur Verhinderung von Salzansätzen in Turbinen und Uberhitzern Bei Anwendung von Hochdruckdampfkesseln besteht die Gefahr, daß sich in den Überhitzern und den. Turbinen Salzansätze bilden, die zu Störungen des Betriebes Anlaß geben. Dieser Umstrand wirkte bisher hemmend auf die stärkere Einführung von Hochdruckdampfkesseln.Process to prevent salt build-up in turbines and superheaters When using high-pressure steam boilers, there is a risk that the superheaters and the. Turbines form salt deposits, which give rise to malfunctions in operation. This boundary has so far had an inhibiting effect on the greater introduction of high-pressure steam boilers.

Nach den Untersuchungen verschiedener Forscher ist .die Anwesenheit von Natriumhydroxyd im Dampf als Ursache für das Festkleben der Salze anzusehen, sei es, daß es den Schmelzpunkt des Salzgemisches herabdrückt, so daß, dieses bei der Arbeitstemperatur flüssig ist, sei es, daS es, an sich klebend wirkt.According to the studies of various researchers, the presence to consider sodium hydroxide in the steam as the cause of the salts sticking, be it that it depresses the melting point of the salt mixture, so that this at the working temperature is liquid, be it that it has an adhesive effect.

Man trägt dieser Erkenntnis bisher Rec1@-nung, indem man die Alkalität des Speisewassers bzw. Kesselwassers mit Säuren. oder sauren Salzen weitgehend abstumpft. Es besteht dabei die Gefahr, daß bei versehentlicher Anwendung zu großer Mengen der zur Abstumpfung benutzten Säuren oder sauren Salze Korrosionen entweder an den Kesselzuleitungen oder sogar im Kessel selbst auftreten.So far this knowledge has been recognized by considering the alkalinity of the feed water or boiler water with acids. or acidic salts largely dull. There is a risk that, if used inadvertently, excessive amounts of the acids or acidic salts used for dulling corrosion either on the Boiler feed lines or even occur in the boiler itself.

Es wurde nun gefunden, daß man bei dem Betrieb von Hochdruckdampfkesseln Salzansatz in, den Überhitzern und den: Turbinen vermeiden kann, wenn man dem in bekannter Weise enthärteten Kesselspeisewasser, dem Kesselwasser oder dem daraus entwickelten Sattdampf Ammensalze, zweckmäßig solche nicht flüchtiger Säuren, insbesondere Ammensulfat oder Ammenphosphat, zusetzt, wobei sich die Bemessung des Salzzusatzes nach der Natriumhydroxydmenge richtet, die ohne Zusatz auftreten würde. Ein Teil des Natriums kann dabei im Kesselspeisewasser auch in Form von Carbonat oder Bicarbonat enthalten sein, das sich erst im Kessel unter Druck zu Natriumhydroxyd und Kohlendioxyd umsetzen würde. Das sich bildende Natriumsalz übt ebenso wie ein zufälliger Überschuß an Ammensalz. keinen Angriff auf die Teile der Dampfkesselanlage aus. Die Konzentrution des entweichenden Ammoniaks kann, falls die ursprüngliche Alkalität des Wassers sehr hoch war, durch passende zeitliche Verteilung des Ammonsalzzusatzes leicht ständig so niedrig gehalten werden, daß keinerlei Gefahr eines Angriffs z. B. auf kupferhaltige Teile der Anlage besteht.It has now been found that the Operation of High pressure steam boilers Avoid salt build-up in, the superheaters and the turbines can, if the boiler feed water softened in a known manner, the boiler water or the saturated steam developed therefrom, preferably non-volatile salts Acids, especially Ammenensulfat or Ammenphosphat, added, whereby the dimensioning the addition of salt depends on the amount of sodium hydroxide that occurs without the addition would. Some of the sodium can also be found in the boiler feed water in the form of carbonate or bicarbonate, which only turns into sodium hydroxide under pressure in the boiler and would convert carbon dioxide. The sodium salt that forms exercises as well as a accidental excess of nurse salt. no attack on the parts of the steam boiler system the end. The concentration of the escaping ammonia can, if the original The alkalinity of the water was very high, due to the appropriate time distribution of the ammonium salt addition can easily be kept so low that no risk of attack z. B. consists of copper-containing parts of the system.

Statt das Ammonsa'lz dem Kesselwasser zuzusetzen, kann man vorteilhaft in den Sattdampf Wasser, z. B. Kondensat, einspritzen, das Ammonsialz, z. B. Ammonsu.lfat, gelöst enthält. Da der Gehalt an Natriumhydroxyd im Dampf nur sehr klein ist (er liegt meistens nur zwischen etwa o,z bis 2,o mg/l), ist die frei werdende Ammoniakmenge so gering, daß sie keine Korrosionen verursachen kann.. Abgesehen davon, daß. die unerwünschte Wirkung des Natriumhydroxyds schon bei nur teilweiser Umsetzung mit z. B. Ammonsulfat stark .gemildert wird, wird das Festkleben des, Salzansatzes durch das Entweichen des bei der Umsetzung entstehenden gasförmigen Ammoniaks noch besonders erschwert. Die Verwendung von Ammansalzen zur Verhinderung von Kesselstein, Wasserstein und Rostbildung ist bekannt. Nach diesem bekannten Verfahren sollen die Ammensalze in der Hitze durch Hydrolyse die entsprechenden Säuren abspalten, welche aus dem Carbonatgehalt des Wassers wassersteinverhindernde Kohlensäure frei machen sollen. Im Gegensatz hierzu handelt es sich bei dem vorliegenden Verfahren. nicht um die Aufbereitung von Wasser zwecks Verhinderung von Wasserstein und Rostbildung, sondern um die Behandlung von bereits. völlig enthärtetem Kesselspeisewasser.Instead of adding the Ammonsa'lz to the boiler water, it can be advantageous in the saturated steam water, z. B. condensate, inject the ammonium, z. B. Ammonsu.lfat, contains dissolved. Since the content of sodium hydroxide in the steam is only very small (er is usually only between about 0.2 to 2.0 mg / l), is the amount of ammonia released so small that it cannot cause any corrosion .. Apart from that. the undesirable effect of the sodium hydroxide even with only partial implementation z. B. ammonium sulfate especially the escape of the gaseous ammonia formed during the reaction difficult. The use of Amman salts to prevent scale, scale and rusting is known. According to this known method, the nurse salts In the heat by hydrolysis, the corresponding acids are split off, which from the The carbonate content of the water is supposed to release the anti-scaling carbon dioxide. This is in contrast to this in the case of the present method. not about that Treatment of water to prevent scale and rust formation, rather to treat already. completely softened boiler feed water.

Claims (1)

PATENTANSPRUCH: Verfahren zur Verhinderung von Salzansätzen in, Turbinen und Überhitzern, die mit Hochdruckdampf betrieben werden, dadurch gekennzeichnet, daß man dem in bekannter Weise enthärteten Kesselspeisewasser, dem Kesselwasser oder dem daraus entwickelten Sattdampf eine dem darin enthaltenen Natriumhydroxyd entsprechende Menge Ammensalze, zweckmäßig solche nicht flüchtiger Säuren, insbesondere Ammensulfat oder Ammenphosphat, zusetzt. Zur Abgrenzung des Erfindungsgegenstands vom Stand der Technik sind im Erteilungsverfahren folgende Druckschriften in Betracht gezogen worden: Deutsche Patentschrift Nr. 616o22; USA.-Patentschrift Nr. ig3567o. PATENT CLAIM: A method for preventing salt deposits in turbines and superheaters that are operated with high pressure steam, characterized in that the boiler feed water softened in a known manner, the boiler water or the saturated steam developed from it, an amount corresponding to the sodium hydroxide contained therein, expediently not volatile acids, especially amine sulfate or amine phosphate, added. In order to distinguish the subject matter of the invention from the state of the art, the following publications were taken into account in the granting procedure: German Patent No. 616o22; U.S. Patent No. ig3567o.
DEI55713D 1936-08-05 1936-08-05 Process to prevent salt build-up in turbines and superheaters Expired DE755389C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI55713D DE755389C (en) 1936-08-05 1936-08-05 Process to prevent salt build-up in turbines and superheaters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI55713D DE755389C (en) 1936-08-05 1936-08-05 Process to prevent salt build-up in turbines and superheaters

Publications (1)

Publication Number Publication Date
DE755389C true DE755389C (en) 1953-03-16

Family

ID=7194199

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI55713D Expired DE755389C (en) 1936-08-05 1936-08-05 Process to prevent salt build-up in turbines and superheaters

Country Status (1)

Country Link
DE (1) DE755389C (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1935670A (en) * 1930-03-15 1933-11-21 Babcock & Wilcox Co Steam generator and method of preventing turbine accumulations
DE616022C (en) * 1930-03-06 1935-07-18 Hydrologie Ag F Process to prevent scale and rust formation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE616022C (en) * 1930-03-06 1935-07-18 Hydrologie Ag F Process to prevent scale and rust formation
US1935670A (en) * 1930-03-15 1933-11-21 Babcock & Wilcox Co Steam generator and method of preventing turbine accumulations

Similar Documents

Publication Publication Date Title
DE875847C (en) Process for cleaning gases, in particular coke oven gases, from sulfur compounds
DE1517399B2 (en) Process for preventing the formation of deposits of scale-forming salts in an aqueous system
DE3230264A1 (en) METHOD FOR PREVENTING CORROSION OF METAL SURFACES IN AQUEOUS SYSTEMS
DE2229012B2 (en) Aqueous solution containing benzotriazole and tolytriazole with an anti-corrosion effect on metals
DE2453107B2 (en) Process for the preparation of phosphoester scale and corrosion inhibiting agents, such agents and their use
DE1517473A1 (en) Process for removing scale and preventing scale formation
DE755389C (en) Process to prevent salt build-up in turbines and superheaters
DE873605C (en) Process for treating glass fibers
DE636912C (en) Process for preventing the corrosion of magnesium and magnesium alloys
DE618614C (en) Process for bright pickling of metals
DE725322C (en) Process to prevent corrosion and the formation of deposits in water-carrying cooling and heating systems with insignificant evaporation
DE876079C (en) Procedure for preventing boiler water from spitting up
DE738121C (en) Process and device for corrosion protection in steam heating systems
DE1141267B (en) Process for separating fixed ammonium salts from coking plant waste water
DE573522C (en) Process to prevent scale formation
DE703556C (en) Sliding fastening of textile fabrics
DE916878C (en) Process for reducing the corrosive influence of water and aqueous solutions on iron
AT79562B (en) Anti-rust process.
AT273831B (en) Process for the prevention of deposits in aqueous systems and means for carrying out the process
AT150982B (en) Process for preventing the corrosion of magnesium and magnesium alloys.
AT73992B (en) Wood impregnation process.
DE931545C (en) Process for reducing corrosion in stills
DE349265C (en) Procedure for processing the gas water
DE732284C (en) Process for soaking wood
DE767910C (en) Prevents condensation from attacking iron materials