sodium carbonate to control slag in a boiler

CHEMICALS - Alpha Marine Solutions

Prevents tube bridging and slag formation. SOOT STICKS Active blend of mineral based salts, containing slag modifiers and carbon oxidation catalyst. Effect to remove unburned carbon slag from: boiler furnaces, super heaters, economisers, air heaters and exhaust path stacks.

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Using of congruent phosphate as equilibrium phosphate ...

Congruent phosphate control was derived to prevent the formation of free caustic by feeding orthophosphates to maintain a boiler water sodium-to-phosphate ratio at which theory surmised free ...

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Binder chemistry of sodium carbonate-activated CFBC fly ...

Apr 23, 2018· Compressive strength tests showed that strength development was relatively faster in samples with 5% sodium carbonate. The main binder gel in samples with and without sodium carbonate was composed of AFt, AFm and C–S–H, while the formation and Al-substitution in C–S–H was enhanced by sodium carbonate-activation.

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Mass Release of Trace Elements from Coal Combustion By ...

Mass Release of Trace Elements from Coal Combustion By-Products Ann G. Kim1 and George Kazonich1 ... sodium carbonate, sulfuric acid, and ferric chloride. The leachate is analyzed for antimony, arsenic, barium, boron, cadmium, chromium, ... 2 non-utility boiler fly ashes and the steel slag. The trace element concentration of these samples is ...

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BOILER WATER TREATMENT - DieselShip

Proper boiler water treatment eliminates sludge and scale deposits within the boiler. However, over along period of time a film of copper and iron oxides build up on the tube surface. Most of these oxides are transported from oxides of corrosion within the feed system to the boiler with the condensate.

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Water Handbook -Boiler Deposits: Occurrence And Control | SUEZ

Carbonate Control. Before the acceptance of phosphate treatment in the 1930's, calcium sulfate scaling was a major boiler problem. Sodium carbonate treatment was used to precipitate calcium as calcium carbonate to prevent the formation of calcium sulfate. The driving force for the formation of calcium carbonate was the maintenance of a high ...

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Standard Specification For Boiler Compound And Water ...

a uniform mixture of sodium lignosulfo-nate, sodium hexametaphosphate, and anti-foam for use as a boiler water additive to control scale formation and to prevent steam contamination. the blend shall be suitable for use in the generation of steam for the process-ing of food, readily soluble in water, contain less than 0.5% insoluble matter,

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Dry Sorbent Injection of Sodium Sorbents for SO2, HCl and ...

In a dry sorbent injection system, trona or sodium bicarbonate is injected directly into hot flue gas. After injection, the sorbent is calcined into porous sodium carbonate that reacts with acid gases (SO 2, HCl and SO 3). This technology is able to achieve high removal rates for .

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Recovery Boiler - an overview | ScienceDirect Topics

May 03, 2011· Sodium carbonate is formed by the combustion of black liquor in the recovery boiler, and then caustic is formed by the addition of calcium oxide to sodium carbonate in the recausticizing plant. • Lime is then recovered in the lime cycle through the calcination of lime mud.

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What do I use to stop boiler foaming and where do it get ...

What do I use to stop boiler foaming and where do it get it. ... allowing one to control the alkalinaty by which of the sodium phosphates is used.When the reaction is with sodium carbonate the products are the insoluable tricalcium phosphate and sodium carbonate which in turn controls calcium sulfate scale and also hydrolyzes to sodium ...

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Water Treatment Requirements for Low and Medium Pressure ...

Apr 27, 2015· Low and medium pressure boilers must be protected from scale deposition and corrosion to promote optimum energy efficiency and prolong the useful life of the plant equipment. The definition of low and medium pressure is somewhat discretionary. For the purposes of this discussion, low pressure shall apply to boilers up to 150 psig. These boilers.

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CORROSION PROTECTION OF CONDENSATE SYSTEMS

Equation #3 illustrates that since soda ash (i.e., sodium carbonate) is also a source of carbon dioxide, sodium hydroxide (i.e., caustic soda) should be used for boiler water pH control rather than soda ash. Carbon dioxide by itself is not corrosive; however, when it dissolves in water (i.e.,

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Power Engineering 4th Class A2 Chapter 67 - Quizlet

Start studying Power Engineering 4th Class A2 Chapter 67. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

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Feed Water Treatment to Avoid Corrosion

Sodium erythorbate; Sodium Sulfite. Sodium Sulfite is a white crystalline or powder soluble in water. Sodium Sulfite decomposes on heating and is prepared from sulfur dioxide and sodium carbonate or caustic soda. Sodium Sulfite is an effective scavenger for use in systems operating below 1000 psi.

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Power Engineering 4th Class A2 Chapter 66 - Quizlet

Start studying Power Engineering 4th Class A2 Chapter 66. Learn vocabulary, terms, and more with flashcards, games, and other study tools. ... Pitting of boiler metal may be prevented by: a. Preheating boiler feed water to between 80 and 105°C ... A. Sodium carbonate B. Sodium anions C. Sodium cations D. Sodium bicarbonate

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Making Vanadium | Vanitec

The slag from South Africa contains up to 25% V2O5 whereas the slag from China and Russia contains between 14% and 22%. The V2O5 is extracted from the slags by a roast-leach process in which the slags are roasted in kilns or in multi-hearth furnaces with sodium carbonate, chloride or .

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Boiler contaminants: jeopardising power plant operation

Boiler contaminants: jeopardising power plant operation. 05 August 2014. Optimum positioning of analytical instruments at key points throughout the water and steam cycle and water treatment plant on modern power stations can provide operators with a valuable insight for improving plant efficiency and cost effectiveness.

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Thermodynamic Study of the Corrosion of Refractories by ...

A large number of scientists studied the influence of additives on the corrosion resistance of refractories. Some of the researchers found that additive could significantly improve the slag corrosion resistance [12,13,14,15,16].Presently, new anti-sodium corrosion refractories have been studied by changing the ratio of refractory materials [17,18,19,20].

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EFFECTS OF CIRCULATING FLUIDIZED BED COMBUSTION FLY .

circulating fluidized bed combustion (CFBC) fly ash, sodium hydroxide (NaOH), sodium silicate (Na 2SiO 3), sodium phos-phate (Na 3PO 4), and sodium carbonate (Na 2CO 3) as activators on the workability, bleeding, sett ing time, compressive strength, shrinking, and absorption of the alkali-activated slag (AAS) cement mortars.

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Four Boiler Contaminants that Jeopardize Power Plant ...

During this process, sodium carbonate is turned into sodium hydroxide, which then attacks iron in the boiler. As iron dissolves, it forms sodium ferroate, which under hydrolysis regenerates into ...

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Best Practices in Cleaning Internal Surfaces of High ...

The drum internals are installed before start of alkali boil out. Normally sodium carbonate and sodium phosphate in equal quantity along with a detergent to about 0.05 to 0.1% by volume are used for alkali boil out. After the boil out solution is added, the drum level is checked though a gauge glass and confirmed before firing the boiler.

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Four Boiler Contaminants that Jeopardize Power Plant ...

During this process, sodium carbonate is turned into sodium hydroxide, which then attacks iron in the boiler. As iron dissolves, it forms sodium ferroate, which under hydrolysis regenerates into ...

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2/18/2014 - The Association of Water Technologies

2/18/2014 10 Condensate inlet and Make Up line are close together. This will cause pitting unless the valve and the "T" are replaced with Stainless Steel. What is The Surge Tank? • Used to control transient heat migration • Can be used as a feed water tank and feed the boiler in lieu of the DA • Can be an integral part of the DA (two

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water treatment – removing hardness (calcium and magnesium ...

Calcium carbonate precipitation takes place with the formation of sodium carbonate that will react with permanent hardness according to reactions (5) and (6) above. Using caustic soda will, therefore, lower water hardness to a level that is equal to twice the reduction in .

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