EC Lesson 11 Scale and sludge formation in boilers

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  • Unit 1 water_technology - SlideShare

    Nov 11, 2012 · Disadvantages of scale formation 1. Fuel wastage – scales have low thermal conductivity 2. Degradation of boiler material and increases of risk of accident 3. Reduces the efficiency of the boiler and- deposit on the valves and condensers 4.Get Price

  • Boilers and Thermic Fluidheaters - SlideShare

    Feb 13, 2012 · (Only applicable to boilers that will stand idle between heating seasons) 5.2 Boilers: extra items for steam raising and hot water boilers Check regularly for build-up of scale or sludge in the boiler vessel or check TDS of boiler water each shift, but not less than once per day.Get Price

  • Tannin based Scale & Corrosion Inhibitor for Boiler Water

    It prevents scale formation by converting residual hardness salts to a mobile non-adherent sludge that can be removed by blowdown in boilers. Product Benefits. Excellent tannin based scale and corrosion inhibitor for boilers. Does not add substantially to boiler water alkalinity. Ideal for boilers susceptible to foam formation.Get Price

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    Page 3 It prevents scale and sludge formation by forming highly soluble calcium hexa meta phosphate complex EC Pdf Notes Link – Complete Notes Unit 1 Link – Unit 1 Unit 2 Link – Unit 2 Unit 3 EDTA. Numerical problems – boiler troubles (scale and sludge). Engineering Chemistry cy8151 semester 1 regulation 2017 Get Price

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    CY8151 – ENGINEERING CHEMISTRY – SYLLABUS (REGULATION 2017) ANNA UNIVERSITY UNIT I WATER AND ITS TREATMENT (CY8151) Hardness of water – types – expression of hardness – units – estimation of hardness of water by EDTA. Numerical problems – boiler troubles (scale and sludge). Engineering Chemistry cy8151 semester 1 regulation 2017 Get Price

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    Aug 13, 2012 · boilers: Scale, sludge formation – disadvantages – prevention – treatment: Internal conditioning – phosphate, 11 EC – 07-08 – SRM – E&T Technical Words Lesson (1-5) TEXT BOOK WITH CASSETTES 1. Grundkurs Deutsch 2. Momentmal (Max Mueller Bhavan – Goethe Institute, Germany).Get Price

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    Jul 16, 2009 · Standard value of P alkalinity in Boiler Water is between 50-300mg CaCO3/l. Effects. Higher value of P alkalinity leads to scale formation and overheating of the inside of the boiler causing internal damage. 6. Chloride ion. It causes generation of scale formation. The more the chloride ions, the more the scale formation.Get Price

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  • Contamination of Groundwater | U.S. Geological Survey

    Mar 02, 2019 · Decreases the lather formation of soap and increases scale formation in hot-water heaters and low-pressure boilers at high levels. Iron: Occurs naturally as a mineral from sediment and rocks or from mining, industrial waste, and corroding metal. Imparts a bitter astringent taste to water and a brownish color to laundered clothing and plumbing Get Price

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    Lesson 10: Softening . Objective. Responsible for forming a carbonate scale inside the steam boilers. Alkalinity. Caustic soda has the advantages of stability in storage, lower sludge formation, and easy handling. However, safety issues still apply. Caustic soda is dangerous to the operator and can cause severe burns to the skin.Get Price

  • Boiler Water Treatment - Association of Water Technologies

    Scale • The chart on the left shows the fuel loss in a boiler based on thickness of scale. • 1/32" = 8.5% • 1/25" = 9.3% • 1/20" = 11.1% • 1/16" = 12.4% • 1/8" = 25% • 1/4" = 40% • 3/8" = 55% • 1/2" = 70% • The economics show that a clean boiler will save far more money in fuel than it could everGet Price

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    sludge as waste, which contains oil, [11]. 5. Heat Tra nsfer The corrosion and scale formation of boiler tubes are the main problems that can lead to boiler operation Get Price

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    Jul 17, 2018 · SZL 10 Ton Coal Fired Central Heating Boiler – MidGreen Boiler Industrial 10 Ton Coal Fired Steam Boiler For … food industries, hotel, … 1.DZL Series coal fired hot water boiler. 2.Heating power … 4 ton fire tube coal fired … 10 Ton Steam Boiler Wholesale, Steam Boiler Suppliers – Alibaba 10 Ton Steam Boiler, … solid fuel coal or Get Price

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    Lenntech can provide you all water treatment equipment, including chemicals. Chemicals will condition the water and protect boiler equipment (heater, pump, …). Lenntech can advise you on treatments required on the make-up water, by providing calculations on mass balance in the steam boiler, contributing for lowerGet Price

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    Lesson 11. Scale and sludge formation in boilers. In boilers, water evaporates continuously and the concentration of the dissolved salts increases progressively. When their concentrations reach saturation point, they are thrown out of water in the form of precipitates on the inner walls of the boiler. If the precipitation takes place in the form of loose and slimy precipitate, it is called sludge.Get Price


    Figure 2.3 Water Tube Boiler: Water tube or "water in tube" boilers in which the conditions are reversed with the water passing through the tubes and the hot gasses passing outside the tubes (see figure 2.3). These boilers can be of single- or multiple-drum type. These boilers can be built to any steam capacities and pressures, and have higher efficiencies than fire tube boilers.Get Price

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    Sludges do not adhere to the metal surfaces but are kept in the boiler water, where they can be blown down. They function by conditioning the sludge, thereby causing it to become considerably softer. The eventual formation of hard scale, which causes typically poor heat transfer, is minimised significantly.Get Price

  • How to remove the scale of hot water boiler

    The following reasons for removing this lime scale build up from the copper tubes and waterways inside a boiler are much the same as they are for other water heating equipment. 1 NOT ENOUGH HOT WATER Lime forms an insulating crust inside the boiler's tubes and waterways. This reduces water flow through the boiler; less GPM (gallons per minute).Get Price

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    Dec 13, 2017 · However, combustion of MSW, which has a high concentration of Cl (0.45–0.72wt.%) 10, (0.5–1.00wt %) 11 and alkali metals (K and Na) result in severe ash deposition and corrosion of the boiler Get Price

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    Page 3 It prevents scale and sludge Page 4/24. Acces PDF Engineering Chemistry 1 Water Unit Notes Engineering lesson, which begins with a PowerPoint presentation, and move to EDTA. Numerical problems – boiler troubles (scale and sludge). Page 18/24. Acces PDF Engineering Chemistry 1 Water Unit Notes Engineering Chemistry cy8151Get Price

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