sodium carbonate to control slag in a boiler

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

I believe washing soda is primarily sodium carbonate.In boilers, it hydrolyzes to form sodium hydroxide and co2 gas, the gas passing off with the steam, generally 70 to 90% of the sodium carbonate becomes sodium hydroxide.

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Role of carbonates in the chemical evolution of sodium ...

72 Sodium carbonate activation of blast furnace slag has been applied for half a century in Easter 73 Europe [20, 21], as a lower cost and more environmentally friendly alternative to the widely 74 used activators sodium hydroxide or sodium silicate used for production of activated slag …

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Standard Specification For Boiler Compound And Water ...

as a boiler water additive to control scale formation and to prevent steam contamination. the blend shall be suitable ... weight sodium carbonate (na co ), light, 23 of which not less than 58% shall be in the form of sodium oxide (na 0). it shall not 2 contain insoluble matter exceeding 0.05%.

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Boiler contaminants: jeopardising power plant operation

 · A problem with sodium is the cycle it undergoes during hydrolysis. 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 sodium hydroxide.

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Dry InjectIon of soDIum sorbents for aIr pollutIon control

control technology is dry injection of sodium sorbents (trona or sodium bicarbonate). In a dry sorbent injection system, sodium sorbent is injected into the hot flue gas duct and reacts with SO 2, SO 3, HCl, HF and some NO x. Due to its low capital cost and ease of opera-tion, dry injection of sodium sorbents is being used at more and more boilers,

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Leaching of aluminum and iron from boiler slag generated ...

Leaching of aluminum and iron from boiler slag generated from a typical Chinese Steel Plant. ... A solution of sodium hydroxide was added to the leach liquor in order to make precipitation of Fe(III) ions. ... The sodium hydrogen carbonate obtained from the precipitation of aluminum hydroxide can be converted to sodium hydroxide ...

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Using Sodium Carbonate/Bicarbonate in stripped product ...

YMMV. In my 25 litres low wines (diluted down to 33% for boiler volume requirements) I added 125g sodium carbonate (store bought washing soda) and 50g rock salt. It was far easier to distinguish foreshots from heads, I collected near a litre with an obvious fuel spirit smell.

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Fixation of CO2 by carbonating calcium derived from blast ...

Preliminary process calculations showed that approximately 4.4 kg of blast furnace slag, 3.6 l of acetic acid (100 wt%), and 3.5 kg of sodium hydroxide would be required to bind 1 kg of carbon dioxide, resulting in 2.5 kg of 90% calcium carbonate.

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QUIZ Analyst Fall 2004 - Home | The Association of Water ...

stringent control of feedwater and condensate chemistry, scale and deposition will ... center of the sample with slag or filings. ... Sodium carbonate 0.5 to 1.0 % by weight Sodium metasilicate 0.5 to 1.0 % by weight Trisodium phosphate 0.5 to 1.0 % by weight

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Water Treatment Requirements for Low and Medium Pressure ...

 · Although dealkalization of boiler makeup is a common practice in high pressure boiler installations, many low and medium pressure boilers operate on soft water makeup. The natural bicarbonate alkalinity is not removed in a sodium exchange water softener.

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Chemical acceleration of a neutral granulated blast ...

1. Introduction. Alkali-activated slag (AAS) concretes are considered as a possible alternative to ordinary Portland cement (OPC) concretes. There are four main activators usually used to activate slags, namely sodium silicates, sodium hydroxide, sodium sulfate, and sodium carbonate.

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BOILER WATER TREATMENT - DieselShip

As a knock on effect will slightly increase boiler water alkalinity. Stable at high temperatures so is used more than hydrazine to control the steam line alkalinity as there is less chance of copper corrosion which occurs with the prescience of ammonia. Proper boiler water treatment eliminates sludge and scale deposits within the boiler.

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THE GREEN TECHNOLOGY

Scale Prevention, Corrosion Control and Oxygen Scavenger includes dispersant . FILTERSORB® SP3, The Non-Chemical Scale Prevention Media BEST BOILER TECHNOLOGIES for Boiler Water Treatment ... contributes to formation of scale as Sodium Carbonate in hot water boilers and Sodium

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QUIZ Analyst Fall 2004 - Home | The Association of Water ...

stringent control of feedwater and condensate chemistry, scale and deposition will ... center of the sample with slag or filings. ... Sodium carbonate 0.5 to 1.0 % by weight Sodium metasilicate 0.5 to 1.0 % by weight Trisodium phosphate 0.5 to 1.0 % by weight

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The National Board of Boiler and Pressure Vessel Inspectors

The exact melting point depends on the relative amounts of sodium and potassium, but the minimum melting point can be as low as 1030 o F. In oil-fired boilers,mixtures of vanadium pentoxide and sodium oxide or vanadium pentoxide and sodium sulfate are the problem.

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Overview - Fuel Tech Inc

In addition to the application of TIFI for SO 3 control, Fuel Tech can combine this approach with the injection of trona or other sodium based sorbents such as sodium bi-sulfite (SBS) or sodium carbonate/bi-carbonate into the duct downstream of the economizer or air heater. Systems designed for the injection of dry magnesium hydroxide or dry ...

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High-Pressure Steam Cycle and Boiler Water Treatment

High-Pressure Steam Cycle and Boiler Water Treatment ... caustic” is generated in the boiler water – Sodium to phosphate ratio is approximately 2.75:1 and provides margin of safety for good control of the program ... prone to slag type deposits

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BOILER WATER TREATMENT - DieselShip

As a knock on effect will slightly increase boiler water alkalinity. Stable at high temperatures so is used more than hydrazine to control the steam line alkalinity as there is less chance of copper corrosion which occurs with the prescience of ammonia. Proper boiler water treatment eliminates sludge and scale deposits within the boiler.

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ALKALINITY CONTROL - Guardian CSC

provides the alkali required for alkalinity control in the boiler water. Most raw waters contain bicarbonate (HCO-). So does effluent waters from sodium cycle and from most sodium-acid cycle zeolite softeners. Under boiler water conditions, bicarbonate decomposes first to carbonate and then to carbon dioxide .

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7 Recovery Boiler Fireside Deposits and Plugging Prevention

RECOVERY BOILER FIRESIDE DEPOSITS AND PLUGGING PREVENTION Honghi Tran Pulp & Paper Centre and ... This "moving target" makes deposit control a ... mainly sodium sulphate (Na2SO4) and sodium carbonate (Na2CO3) with a small amount of sodium chloride (NaCl), and reduced sulphur compounds, such as Na2S.

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Technologies for the Control of Sulphur Dioxide Emissions ...

Technologies for the Control of Sulphur Dioxide Emissions From Coal /Pet Coke Fired Boiler Prof .Veena. A Shinde a, Mr.Kushal V. Kadam b ... material than other alkalis such as sodium carbonate, magnesium carbonate and ammonia which is expensive than limestone .The alkali used reacts with SO ...

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Boiler contaminants: jeopardising power plant operation

 · A problem with sodium is the cycle it undergoes during hydrolysis. 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 sodium hydroxide.

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Quality COLOR SPECKLES & AOS Manufacturer

COLOR SPECKLES & AOS. Sodium Carboxymethyl Cellulose CMC Detergent Grade. Contact Now. Sodium Tripolyphosphate(STPP 94%) for detergent powder and water softerner (mostly for the boiler); ceramic industry. Contact Now. sodium carbonate/soda ash light. Contact Now. Detergent Grade Sodium Silicate or Solid Water Glass Na2sio3. Contact Now.

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Use trisodium phosphate or sodium carbonate to neutralize the boiler water - do not use both. The proportions are 1 lb. for each 50 gallons of water when using trisodium phosphate (TSP) or 1 lb. for each 30 gallons of water when using sodium carbonate. Sodium hydroxide (lye) is sometimes a recommended chemical by some publications, but

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Power Engineering 4th Class A2 Chapter 66 Flashcards | Quizlet

Pitting of boiler metal may be prevented by: a. Preheating boiler feed water to between 80 and 105°C ... slag deposits in superheaters b) decreased steam pressure c) increased steam pressure d) increase in boiler efficiency e) tube failure. E. ... A. Sodium carbonate B. Sodium anions C. Sodium cations D. Sodium bicarbonate

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71 of 113

welding slag 6. and plain old dirt ... Use trisodium phosphate or sodium carbonate to neutralize the boiler water - do not use both. The proportions are 1 lb. for each 50 gallons of water when using trisodium phosphate (TSP) or 1 lb. for each 30 gallons of water when using sodium carbonate. Sodium hydroxide (lye) is sometimes a recommended ...

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Chemical acceleration of a neutral granulated blast ...

furnace slag activated using sodium carbonate. As strength development of alkali-activated slag cements containing neutral GBFS and sodium carbonate as activator at room temperature is known to be slow, three accelerators were investigated: sodium hydroxide, ordinary Portland cement and a combination of silica fume and slaked lime.

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Guide to Low-Emission Boiler and Combustion Equipment ...

GUIDE TO LOW-EMISSION BOILER AND COMBUSTION EQUIPMENT SELECTION C. B. Oland Date Published: April 2002 Prepared for the U.S. Department of Energy Office of Industrial Technologies Prepared by OAK RIDGE NATIONAL LABORATORY Oak Ridge, Tennes managed by UT-BATTELLE, LLC for the U.S. DEPARTMENT OF ENERGY under contract DE-AC 00OR22725

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Boiler feed water - Lenntech

Priming, or the passage of steam from a boiler in "belches", is caused by the concentration sodium carbonate, sodium sulphate, or sodium chloride in solution. Sodium sulphate is found in many waters in the USA, and in waters where calcium or magnesium is precipitated with soda ash.

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Feed Water Treatment to Avoid Corrosion - Engineering ToolBox

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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Boiler water - Wikipedia

Boiler water is the liquid phase of steam within a boiler. The term may also be applied to raw water intended for use in boilers, treated boiler feedwater , steam condensate being returned to a boiler, or boiler blowdown being removed from a boiler.

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1 Recausticizing - Principles and Practice - TAPPI

Sodium + Water + Calcium = Calcium + Sodium Carbonate Oxide Carbonate Hydroxide Figure 1 Shows the flowsheet in the form of a block diagram. CHEMICALS IN THE RECAUSTICIZING PLANT Sodium Carbonate (Na2CO3) - This is the main constituent of the smelt generated in the recovery boiler. Dissolving the

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Control of Slag and Insoluble Buildup in Ladles, Melting ...

unit feed stocks has steadily deteriorated. The result: slag related melting problems have become widespread issues in recent years. Yet, a search of the foundry technical literature from the past 30 years about slag control and buildup will result in only a handful of articles.

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Utilizing Iron and Steel Slag’s in Environmental ...

Utilizing Iron and Steel Slag’s in Environmental Applications-An Overview . Introduction . ... A basic method of algal control involves ... neutralization by the addition of alkaline chemicals (such as limestone, lime, sodium hydroxide, sodium carbonate, or magnesia) to water. Active treatment systems generally

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BOILER WATER TREATMENT AND CONDENSATE RETURN …

BOILER WATER TREATMENT AND CONDENSATE RETURN LINE PROTECTION By Richard B. Carey Hagan, Chemicals Controls, Inc: ,Hall Laboratories ... (sodium carbonate) are added to the water which has been heated to 215 degrees - 225 degrees F. The calcium and mag- ... one further step for complete control over boiler water conditions, and that is blowdown. ...

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Using of congruent phosphate as equilibrium phosphate ...

2 Methods of boiler internal scale control 2.1 Carbonate control Before the acceptance of phosphate treatment in the 1930’s, calcium sulphate scaling was a major boiler problem. Sodium carbonate treatment was used to precipitate calcium as calcium carbonate to prevent formation of …

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What are tannins and lignins, and how do they prevent ...

* During softening of water , we use sodium carbonate (soda lime process ) and due which part of sodium carbonate left behind in water.And in boiler usually temperatures used are high. ... What are tannins and lignins, and how do they prevent caustic embrittlement in boilers? Update Cancel. ... Or to avoid this problem,either we can control ...

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Feed Water Treatment to Avoid Corrosion - Engineering ToolBox

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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Role of carbonates in the chemical evolution of sodium ...

Role of carbonates in the chemical evolution of sodium carbonate-activated slag binders ... which could control the preferential consumption of Ca2? by the CO 3 2 ... slag at early times of curing, enhancing the use of these materials in engineering applications. Keywords Alkali-activated slag Sodium carbonate X-ray diffraction Nuclear magnetic

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Chemical acceleration of a neutral granulated blast ...

1. Introduction. Alkali-activated slag (AAS) concretes are considered as a possible alternative to ordinary Portland cement (OPC) concretes. There are four main activators usually used to activate slags, namely sodium silicates, sodium hydroxide, sodium sulfate, and sodium carbonate.

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