A high-pressure boiler is a type of boiler that operates at a pressure above 80 bars. They are widely used in thermal power plants for the generation of power. In this article, we can discuss high-pressure boilers along with its types, Working, Advantages, Disadvantages & Applications.
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Jun 12, 2019 · Low-pressure Boiler: Typically used for process heating, low-pressure boilers can produce steam at a pressure as low as 15-20 bars. Medium-pressure Boiler: Used for power generation or a combination of power generation and process heating, medium-pressure boilers produce steam at a working pressure of 20-80 bars. High-pressure Boiler
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A kettle reboiler (Figure 10.1) consists of a horizontally mounted TEMA K-shell and a tube bundle comprised of either U-tubes or straight tubes (regular or finned) with a pull-through (type T) floating head.The tube bundle is unbaffled, so support plates are provided for tube support. Liquid is fed by gravity from the column sump and enters at the bottom of the shell through one or …
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Some boiler installations need 3-pump HP dosing systems, as shown above. Note the dissolving basket fitted in the dosing tank, and the top-mounted level switch (to stop pump on low level). 35. The General Arrangement drawing (known as GA Drawing) for a typical 2-pump boiler feed water dosing system is shown on the next slide…..
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It is the intercrystalline cracking of boiler due to Na2CO3. In high pressure, Na2CO3 undergoes hydrolysis to produce NaOH. This makes water caustic. The NaOH contenting water flows into the minute hair-cracks. Na2CO3 + H2O 2 NaOH + CO2 This NaOH occupies the hair line cracks of boiler metal and converts the insoluble Fe
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The advantages of Babcock and Wilcox boiler are: The overall efficiency of this boiler is high. The steam generation rate is higher about 20 ton per hour at pressure 10 to 20 bars. The tubes can be replaced easily. The boiler can expand and contract freely. It …
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When setting the boiler pressure of a hot water boiler: 1. The boiler pressure is set at least 70 kPa lower than the safety valve setting. 2. The boiler pressure should be set lower than 25% of the safety valve setting 3. The boiler pressure should be set at highest value possible for efficiency Select one: a. 1, 2, 3 b. 1 c. 2, 3 d. 2 e.
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Aug 05, 2018 · High high water level : If water at level H1 is not acknowledged, the feed water pump will stop at level H2, therefore cutting water supply to the boiler drum, the feed pump stop to prevent the drum of boiler from excessive hydraulic pressure exerted by the feed water, which may explode the boiler drum (at least weaken it).
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Configurations : Single drum / Bi Drum; Application : Power & Process; AFBC boilers offer efficient, cost-effective and reliable steam generation. The benefits include fuel flexibility, high efficiency, low emissions, and reduced capital and operating expenses. Our boilers are ideal for burning fuels containing high ash and high Sulphur content.
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ASSIGNMENT ASSIGNMENT Write a short notes on sludge Write a short notes This results high pressure causing boiler to in The addition of sodium phosphate in hard water reacts with the hardness hard water reacts with the hardness causing agents and gives calcium and causing agents and gives calcium and magnesium phosphates which are soft
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The pressure of steam inside the boiler is high, and so the feed water pressure must be raised before its entry into the boiler for consistent operation. Feed pump is a device which raises the pressure of water and forces it into the boiler. Feed water pressure must overcome the steam pressure for a steady flow of water to the boiler.
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May 04, 2021 · Boiler Feedwater Impurities. Water sources contain impurities that, at certain levels, can be very harmful.At high temperatures, even trace amounts of certain substances in feedwater can cause severe damage to equipment and pipes in a short amount of time. Problematic dissolved solids or suspended solids, oxygen, carbon dioxide and organic matter …
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(b) High Pressure, High-Temperature Boiler - A boiler in which water, oil, or other fluid is heated and intended for operation at pressures in excess of l60 psi and/or tem peratures in excess of 250 degrees Fahrenheit. (c) Heating Boiler - A steam or vapor boiler operating at a pressure not exceeding l5 psi steam pressure or
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Mar 21, 2013 · A) SAFETY VALVE: The function of the safety valve is to permit the steam in the boiler to escape to atmosp0here when pressure in the steam space in the boiler. The safety valve operates in the principle that a valve is pressed against its seat through some agency such as sturt, screw or spring by external weight or force, when the steam force
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Cornish boiler. These are the earliest form of high pressure fire tube boiler. These consist of long horizontal cylinder with single large flue containing fire. Fuel is added in the grate area where it burn to produce hot gases. The hot gases transfer the heat to the water. Water takes heat and after some time it starts boiling to produce steam.
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High-pressure boiler: The maximum pressure is more than 80 bars. Sub-critical boiler: If the boiler produces steam at a pressure that is less than the critical pressure it is known as sub-critical. Supercritical boiler: These boilers are used to produce steam at a pressure which is greater than the critical pressure.
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Demineralizers can produce high-purity water for nearly every use. Demineralized water is widely used for high pressure boiler feedwater and for many process waters. The quality of water produced is comparable to distilled water, usually at a fraction of the cost. Demineralizers come in a wide variety of sizes.
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Water Tube Boiler. Water tube boilers come under the category of the High-pressure boiler which is mainly designed for the power generation stations. In water tube boilers, water and steam mixture is inside the tubes while flue gases or smoke flow across the tubes. Wet Scrubber. Wet scrubbers are used in boilers as boiler accessories to control
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Sub-Critical Boiler: If the boiler produces steam at a pressure less than the critical pressure it is called sub-critical. Low-Pressure Boiler: The maximum pressure is of 15-20 bar and is used for the purpose of heating. High-Pressure Boiler: This boiler has a …
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High pressure air is used to convey the ash to the suitable location. A Boiler is consuming 72 TPH an imported coal having ash % 8, calculate the total ash generated in a complete month. Write a short note on properties of materials used in engineering of power plant. Strength: Ability to resist externally applied forces.
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In high pressure boilers, an excess of a soluble phosphate is added to the boiler water to precipitate the residual calcium ions in the form of a non-adherent precipitate of calcium phosphate and thus the scale formation is prevented. 20. Differentiate between drinking water and boiler feed water. S.No Drinking water Boiler feed water
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This steam possesses high pressure kinetic energy. The boiler contains water. The water is heated to its boiling temperature by the use of heat from the furnace. Due to heating of water, it gets converted into high pressure steam. The steam generated is …
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Mechanisms. Carryover also known as priming is any solid, liquid or vaporous contaminant that leaves a boiler with the steam. In low/medium pressure boilers (<100 bar) entrained boiler water is the most common cause of steam contamination. Both mechanical factors such as boiler design, high water levels, load characteristics and chemical factors such as high solids …
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Write Short Notes On 'intermittent Blow Down' And 'continuous Blow Down' With Respect To Boilers? Answer : The 'intermittent blown down' is given by manually operating a valve fitted to discharge pipe at the lowest point of boiler shell to reduce parameters (TDS or conductivity, pH, Silica and Phosphates concentration) within
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High pressure air is used to convey the ash to the suitable location. A Boiler is consuming 72 TPH an imported coal having ash % 8, calculate the total ash generated in a complete month. Write a short note on properties of materials used in engineering of power plant. Strength: Ability to resist externally applied forces.
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The high pressure feed water is supplied to the boiler through this valve. This valve opens towards the boiler only and feeds the water to the boiler. If the feed water pressure is less than the boiler steam pressure then this valve remains closed and prevents the back flow of steam through the valve.
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