The boiler receives the feed water, which consists of varying proportion of recovered condensed water (return water) and fresh water, which has been purified in varying degrees (make up water).The make-up water is usually natural water either in its raw state, or treated by some process before use.
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Sep 26, 2016 · For industrial companies using a boiler for its facility, some type of boiler feed water treatment system is usually necessary to ensure an efficient process and quality steam generation. The most appropriate boiler feed water treatment system will help the facility avoid costly plant downtime, expensive maintenance fees, and boiler failure as a result of scaling, corrosion, and fouling of the
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Boilers work at a high heat adjacent to pressurized vessels which put their operators at a risk of burns and explosions. Burning of fuel used in boilers may lead to fires, carbon monoxide poisoning, etc. Boiler operators come into contact with various substances used in boilers (fuel, water additives, etc.) which may lead to eye and skin disorders.
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Apr 07, 2019 · The quality of boiler water plays an important role in deciding the overall marine boiler efficiency. Contamination of boiler water leads to several types of problems, including the main ones - corrosion and scale formation.
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As the boiler water cycles of concentration increase then the feedwater flow and the steam make approach the same number Basic Boiler Calculations. Calculate the feedwater composition (impurities) from make up and condensate analysis below Make-Up Condensate Feedwater Total Hardness 2 …
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Sep 01, 2011 · Following are the main objects of boiler water treatment. Prevention of scale formation in boiler and feed system by using distilled water or precipitating all scale forming salts into non adherent sludge. Prevention of corrosion in boiler and feed system by maintaining the boiler water in an alkaline condition, free from dissolved gases.
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The use of chelant treatments and demineralized water has improved the cleanliness of boiler heat transfer surfaces to such an extent that essentially bare-metal conditions are common. Only a thin, protective, magnetic oxide film remains in such instances.
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Sep 04, 2020 · Inside the boiler system, the boiler feed water passes through a series of pipelines, tanks, and equipment. The feed water is always chemically treated to reduce the effects of harmful minerals and gases. However, the boiler feed water is not the only one responsible for problems related to boiler water contamination and boiler efficiency. The
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The blowdown from the flash tank is passed through an exchanger and used to preheat boiler makeup water. With the use of an efficient heat exchange unit, the only heat loss is the terminal temperature difference between the incoming makeup water and the blowdown water to the sewer. This difference usually amounts to 10-20°F (5-10°C).
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The boiler receives the feed water, which consists of varying proportion of recovered condensed water (return water) and fresh water, which has been purified in varying degrees (make up water).The make-up water is usually natural water either in its raw state, or treated by some process before use.
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Sep 03, 2020 · Although water from marine evaporators and boiler condensate return systems is essentially "pure", minute quantities of potentially harmful salts and minerals can be carried by this composition and feed water into the boiler, where they will accrue, ultimately resulting in serious problems in the steam generating unit.
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Both effects will reduce the pipe's overall thermal efficiency when used as a heat exchanger. Boiler feedwater is an essential part of boiler operations. The feed water is put into the steam drum from a feed pump. In the steam drum the feed water is then turned into steam from the heat. After the steam is used it is then dumped to the main
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May 31, 2009 · water in the boiler; when the spaces between the tubes and flues are contracted; when there is fierce ebullition, this cause may be said to accompany all priming; in passing from fresh water to salt or salt to fresh; when the water used is muddy, dirty, …
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Jan 18, 2016 · Hard water is water that has a higher than usual mineral content. While hard water may not be harmful to you directly, it can cause a number of problems with your plumbing system and appliances using water, including your boiler. The minerals in the hard water can lead to scale building up within your boiler.
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In some marine boilers with main burner firing in heavy fuel oil, it is very difficult to initially start the boiler with the main burner. For start up of such boiler, a separate pilot or ignition burner is provided which uses diesel oil as fuel. This enables the pilot burner to ignite even at the coldest condition the ship …
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Mar 12, 2013 · The main idea is to make gas give its all heat to the water and hence the efficiency of the boiler is increased. Natural / forced draught- On ships we generally use the forced draught fans. Heat source – solid / liquid / gas / nuclear / waste gas- If we talk about marine boiler heat source that is being used on ships, then liquid and waste
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Boiler water chemistry - Properties of feed water explored
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Common issues found on boiler due to feed water quality - DieselShip
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Boiler water carry-over is the contamination of the steam with boiler-water solids. Bubbles or froth actually build up on the surface of the boiler water and pass out with the steam. This is called foaming and it is caused by high concentration of any solids in the boiler water. It is generally believed, however, that specific substances such as alkalis, oils, fats, greases, certain types of
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Sep 03, 2020 · Using unprocessed fresh water (e.g. shore water) as a makeup source can present some of the same problems experienced with distilled water, but in addition, certain contaminants which are naturally present in fresh water can be extremely destructive in boiler systems if not dealt with promptly and effectively soluble salts such as Chloride
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