sodium carbonate to control slag in a boiler

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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 sulphate or lime in Russia This produces sodium vanadates ....

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Sodium Hydroxide 25 for pH Control, Boiler ,

25 sodium hydroxide caustic soda for pH control, boiler feedwater deionization plant resin regeneration More on our high-quality sodium hydroxide here...

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

and easy-to-use option for waste-to-energy boiler owners INTRODUCTION Solid waste incinerators emit air pollutants such as SO 2, HCl, and mercury The wet scrubbers used at the utility power plants are too large and costly for waste-to-energy applications As a result, dry sorbent injection of sodium sorbents ,...

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Boiler Water Treatment Chemicals, Feed, and Control ,

Boiler Water Treatment Chemicals, Feed, and Control - Perhaps It Is More Complicated Than We Thought - Dave Christophersen CROWN Solutions, Inc September 15, 2006 Chemicals used to treat steam boiler systems are applied based upon the demand and mode of reaction of each chemical used The theoretical versus actual consumption and the ease of...

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Feed Water Treatment to Avoid Corrosion

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 For pressures above 1000 psi breakdowns may form corrosive Hydrogen Sulfide and/or Sulfur Dioxide Sodium Sulfite may also increase the amount of dissolved solids and the conductivity of the boiler ....

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SODIUM CARBONATE

SODIUM CARBONATE SODA ASH Technical Data Sheet ALKALINITY VALUES Alkalinity active sodium oxide is expressed as a percent of the molecular weights of the alkali relative to sodium oxide An alkalinity conversion factor of 132 tons of soda ash for each dry ton of caustic soda is established from this comparison of percent Na 2 O...

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US20070119352A1

A slag and corrosion control process is described The process entails identifying the location of at least one slagging problem area in a boiler introducing a slag control chemical comprising magnesium oxide or hydroxide into combustion gases in a location identified as having a slagging problem identifying the location of at least one corrosion problem area in a boiler and introducing a ....

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Scaling in boilers

Causes, and prevention of scaling in boilers, type of scaling Boiler scale is caused by impurities being precipitated out of the water directly on heat transfer surfaces or by suspended matter in water settling out on the metal and becoming hard and adherent Evaporation in a boiler causes impurities to concentrate This interferes with heat transfers and may cause hot spots...

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Why is phosphate dosing done in a boiler?

Phosphate is doing interesting job in Boiler It works as an anti-scalant since phosphate react with calcium hardness to create suspended solids which is easier to discharge via blowdown in order to prevent any calcium carbonate CaCO3 /calcium....

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Coal Bottom Ash/Boiler Slag

Boiler slag usually exhibits less abrasion loss and soundness loss than bottom ash because of the glassy surface texture and lower porosity 30 Coal pyrites or soluble sulfate that are sometimes in bottom ash or boiler slag, may account for the sodium ,...

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PDF Thermodynamic Study of the Corrosion of ,

The corrosion of refractories by sodium salts in waste liquid at high temperature has become a serious problem This paper focuses on the thermodynamic characterization of sodium carbonate Na2CO3 ....

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Fireside Deposits In Coal

Fireside deposits in coal-fired boilers TABLE l Major causes of wall slag slag grows in size, the flue gas velocity increas This increased velocity and the decreased heat transfer due to slag insulated tubes tends to cause slag buildup in the next section of the convection pass As the slag builds up, it s strength increas At...

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Thermodynamic Study of the Corrosion of ,

A large number of scientists studied the influence of additives on the corrosion resistance of refractori 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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Stationary Engineer Flashcards Quizlet

1 to remove precipitated sludge or loose scale \n2 To permit rapid lowering of the boiler water if it has become too high accidentally \n3 As a means of removing water from the boiler so that fresh water may be added to keep the concentration of solids below the point where difficulties may be experienced...

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CHEMISTRY 224 THE CONDENSATE, FEEDWATER AND BOiLER SYSTEM

a the desired boiler water pH numerical values, and b that all other desired values are ALARA OBJECTIVES On completion of this lesson the trainee will be able to General 21 State and briefly explain two major objectives of chemical control of the Condensate, Feedwater and Boiler System...

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Standard Specification For Boiler Compound And Water ,

a uniform mixture of sodium lignosulfo-nate, sodium hexametaphosphate, and anti- 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 05 insoluble matter....

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Coal Bottom Ash/Boiler Slag

Boiler slags are predominantly single-sized and within a range of 50 to 05 mm No 4 to No 40 sieve Ordinarily, boiler slags have a smooth surface texture, but if gases are trapped in the slag as it is tapped from the furnace, the quenched slag will become somewhat vesicular or porous...

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BOILER WATER TREATMENT FUNDAMENTALS

An example of this combining of ions is the action between Calcium and Carbonate The chemical compound which forms is Calcium Carbonate Other impurities which will affect the boiler water treatment control include Copper, Iron Oxides, oil and dissolved gas...

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ALKALINITY CONTROL

Sodium hydroxide and/or sodium carbonate may be present as excess treating chemicals in the effluent from a lime-soda softener the use of such pre-treating equipment automatically 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 ....

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Hot water, sodium carbonate, and sodium ,

Hot water, sodium carbonate, and sodium bicarbonate for the control of postharvest green and blue molds of clementine mandarins Article in Postharvest Biology and Technology 24 1 January 2002 ....

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Four Boiler Contaminants that Jeopardize Power ,

A particular 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 ....

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Steam Boiler Control Phosphate in Steam Boiler

Control phosphate in steam boiler is controlling process of phosphate which is supplied into steam boiler Phosphate is soluble in water alkalinity in the boiler so that the concentration can be maintained by adding sodium phosphate which having different alkalinity...

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DEPOSIT CONTROL FOR A BLACK LIQUOR ,

07022019 0183 32 Disclosed is a process for reducing slag in a black liquor recovery boiler, the process comprising injecting and burning black liquor in a boiler by contacting it with primary air and secondary air introducing a slag-reducing chemical into the gases above the injection locations through interlaced, tangential or concentric secondary, tertiary, and/or quarternary air ports...

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Hydration of slag

The hydration of slag-blended cements was investigated in this study A large experimental program was performed to measure the main hydration reaction indicators such as heat release, free and combined water, and portlandite content A multiphasic hydration model is proposed to take the difference of hydration kinetics between clinker and slag ....

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Power Engineering 4th Class A2 Chapter 67

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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Method of protecting steam boilers against ,

Analysis of the deposit in the seams of the first boiler showed 80 sodium sulfate, 10 sodiumchloride, and 10 sodium carbonate It will be obvious that the invention is not limited to steam boilers as such but is equally applicable to evaporators or any container in which water containing free alkali or carbonate may be heated Thus, for ....

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Study 53 Terms Power Engineering 4th Class ,

Start studying Power Engineering 4th Class A2 Chapter 66 Learn vocabulary, terms, and more with flashcards, games, and other study tools...

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Using Sodium Bicarbonate for SO2 Mitigation ,

Milled sodium bicarbonate has been known to be more reactive than trona in mitigating SO 2, so in late 2007 a trial with sodium bicarbonate was conducted with the existing trona handling system to ....

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DEPOSIT CONTROL FOR A BLACK LIQUOR ,

Disclosed is a process for reducing slag in a black liquor recovery boiler, the process comprising injecting and burning black liquor in a boiler by contacting it with primary air and secondary air introducing a slag-reducing chemical into the gases above the injection locations through interlaced, tangential or concentric secondary, tertiary, and/or quarternary air ports...

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Boiler Water Treatment Services ChemTreat, Inc

ChemTreat field engineers have more experience with boiler water treatment than any other technical team in the industry After evaluating the steam generator network, our technical experts can identify items to improve plant efficiency and equipment reliability...

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