sodium carbonate to control slag in a boiler

Power Engineering 4th Class A2 Chapter 67 Flashcards | Quizlet

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

What is caustic embrittlement? - Quora

May 10, 2019· Caustic embrittlement is the phenomena in which the material of a boiler becomes brittle due to the accumulation of caustic soda. * As water evaporates in the boiler, the concentration of sodium carbonate increases in the boiler. Sodium carbonate ...

US5024783A - Boiler and boiler water treatment system ...

An in-service formulation for the removal of scale deposits from metallic working surfaces of boilers and for the ongoing prevention of build-up of such deposits on boiler surfaces, with such deposits commonly consisting of insoluble salts of calcium together with oxides of iron. The formulation comprises a blend of selected phosphonates, sodium lignosulfonate, one or more scale-modifying ...

Calculating Boiler Chemical Requirements – Water ...

Jun 26, 2017· B. Sodium sulfite dosage. Once the oxygen content of the feedwater has been estimated, the sulfite dosages can be calculated. The sulfite dosage is the sum of the ppm needed to neutralize the dissolved oxygen, plus additional amounts needed to produce an acceptable boiler water residual.

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…

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 ...

Boiler & Heating Water Treatment | Hawkins Inc.

Boiler Ultra-Concentrated Water Treatment This easy to use, easy to handle system features a more efficient use of chemical, labor, and freight. Click on the link below to find out more of this innovative solution that could make your life incredibly easy when dealing with boiler water treatment chemicals.

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 ...

Dosing Regimens for Marine Water Boilers

Marine boilers operate at high temperatures and pressures to supply superheated steam to the main and auxiliary steam turbines. To maintain the boiler's optimum steam output the feed water must be regularly tested. Any impurities or adverse conditions determined by testing should be eliminated by using standard dosing regimens for marine water boilers, and carried out by a merchant marine ...

Refractories by Sodium Carbonate - mdpi.com

Refractories by Sodium Carbonate Ying Zhao 1,*, Guishi Cheng 1, Yu Xiang 1, ... is studied from the viewpoint of slag and sedimentt; the anti-sodium corrosion performance of ... Corrosion of the refractory material by sodium salts in a waste liquid boiler.

Recovery Boiler Blog: POWER PLANT

Recovery Boiler - 6 is one of the two boiler units operating in the RB - 1 ( RB - 5 and RB - 6 ) . Boiler is located in the area currently only Riau.And Recovery boiler - 6, listed as one of the boilers are capable of operated for 365 days, 12 months without any stop …

Sodium Carbonate & Its Uses - WorldOfChemicals - Medium

Nov 14, 2016· Sodium carbonate is the chemical name for soda ash and washing soda. Major source of soda ash is trona ore. Sodium carbonate occurs naturally in …

Section 3 - Module 10: Internal Water Treatment for Boilers

Hydrazine is used in some high-pressure boilers: A ) To control the dissolved solids B ) To prevent foaming C ) To eliminate erosion D ) To reduce oxygen pitting ... Sodium in the boiler water to form sodium carbonate that attacks the colder areas of the boiler water …

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.

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.

Boiler water - Wikipedia

Boiler water is liquid water within a boiler, or in associated piping, pumps and other equipment, that is intended for evaporation into steam.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.

Controlling the reaction kinetics of sodium carbonate ...

Control of the kinetics of reaction of sodium carbonate-activated slag has been achieved in this study by adding CLDH as a carbonate binding agent, based on the understanding of the relationship between slag chemistry and the role of the functional group of the activator when producing activated slag …

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 calcium sulphate.

Chapter 12 Boiler Deposits: Occurence 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 ...

Sodium carbonate Na 2 CO 3 Washing soda Alkalinity Sodium bicarbonate NaHCO 3 ... of the boiler control panel before supply can be re-established. If the impurities in the boiler feedwater are not dealt with properly, carryover of boiler water into the steam system can occur. This may lead to problems

4-4 Recovery Boiler Chemical Principles

sulphur and sodium compounds would be transformed to sodium sulphide (Na2S) and sodium carbonate (Na2CO3) and be contained in the smelt on the furnace bottom. In a real recovery boiler, however, the process is more complicated. Figure shows an example of sulphur and sodium balances in a typical recovery boiler. This example could describe a process

Boiler Water Treatment | Sodium Chloride | Sodium Hydroxide

Sodium carbonate is converted into Sodium hydroxide, which increases the alkalinity of the water. Lime-Soda Treatment The problems: Increased levels of soluble sodium salts in the boiler, leading to dangers of foaming and carry-over. Uncontrolled production of sodium hydroxide leading to increased levels of caustic alkalinity.

ALKALINITY CONTROL - Guardian CSC

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 ...

4-7 Recovery Boiler Fireside Deposits and Plugging Prevention

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 Na2 ... various locations in the boiler. The carbonate content in deposits decreases dramatically toward the back side of the boiler. 4.7-4 Na 2CO 3 ...

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. Iron (Fe) and Manganese (Mn)

Recovery boiler - Wikipedia

Recovery boiler is the part of Kraft process of pulping where chemicals for white liquor are recovered and reformed from black liquor, which contains lignin from previously processed wood. The black liquor is burned, generating heat, which is usually used in the process or in making electricity, much as in a conventional steam power plant.The invention of the recovery boiler by G.H. Tomlinson ...

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.

Boiler - an overview | ScienceDirect Topics

Boiler slag is a by-product produced from a wet-bottom boiler, which a special type of boiler designed to keep bottom ash in a molten state before it is removed. These types of boilers (slag-tap and cyclone boilers) are much more compact than pulverized coal boilers used by most large utility generating stations and can burn a wide range of ...

US7845292B2 - Process for slag and corrosion control in ...

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 ...

Steam Boiler: Control Phosphate in Steam Boiler

Depending on the substances contained in the feed water and desired level of alkalinity in the boiler water and also the selected phosphate, so the control of phosphate can be equipped with add alkali in the form of sodium carbonate or sodium hydroxide.

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 …

Chemical acceleration of a neutral granulated blast ...

This paper presents results of a study on 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

FAQs | Weil-McLain Boilers & Products

Sodium carbonate (up to one pound for every 30 gallons of water content) or sodium hydroxide (lye) (up to one pound for every 50 gallons) may be used. Check pH level after cleaning. It should be between 7 and 8.5. A small amount of cleaner maybe added to adjust the pH up to the proper range. DO NOT use petroleum-based products in the boiler.