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iii) Operation 1) Exhaust gas boiler circulation must be maintained at all times. This is to maintain tube temperature and prevent "cold end" corrosion of tube and fins. 2) Soot blowing to be carried out at least three times daily. 3) If it is necessary to stop …
reduction of fuels quality and increasing the exhaust gas boiler efficiency had resulted in a recent year's increase of incidents of fire. Figure No. 1 shows the statistical representation of exhaust gas boiler fire on ships under the DNV supervision . Data for the 1993 rd and 2003 were not collected, and so even after the 2005th year. Due
Aug 27, 2015 · This may result in boiler soot fire or boiler uptake fire. When an uptake fire is suspected, never soot blow the economiser. Soot blow with steam causes steam to convert as hydrogen gas and result in metal fire. Preventive Actions. Regularly inspect boiler …
Problems in Boilers – Marine Study
Dec 21, 2017 · In engineering applications, there are various types of boilers such as water tube boilers, fire tube boilers, packaged boiler, fluidized bed combustion boiler, pulverized fuel boiler and waste heat boilers. These boilers are used in different industries such as power plants, paper, and chemical. The present paper reports various problems (such as agglomeration, slagging, fouling, caustic
Because the exhaust gasses pass through tubes submerged in water, the boiler is referred to as a 'fire/smoke tube boiler'. Water tube boilers have tubes full of water that are surrounded by exhaust gas i.e. the opposite of a fire tube boiler configuration. Fire Tube Boilers. Boiler Parts and Functions. Shell
In recent years, many troubles with tube leakage of exhaust gas side of water tube type composite boiler have been reported from the users. These troubles are mainly caused by inadequate or too much washing with water of the tubes. Wrong handling may further accelerate the sulfuric-acid corrosion at the dew point and shorten the life of boiler
and fire tube boilers puts it all together in one amazing combi-boiler in 2 sizes: NFC-175 & NFC-200. 5 modes of external domestic recirculation control built-in (Always on, Intelligent, Scheduling, HotButton, Aquastat) 11:1 TDR for DHW and up to 11:1 TDR for HTG; Approved venting: 2" up to 60' or 3" up to 150' PVC/CPVC/PP/SS
May 22, 2015 · Hydrogen Fires Instances have occurred in which the tubes of watertube boilers, superheaters, economisers and exhaust gas heat exchangers have, as a result of an intense fire, literally melted and run away in streams. Sometimes in the case of vertical tubes, they have melted and flowed back into their headers to solidify.
Mar 06, 2020 · An Exhaust Gas Boiler is a type of heat recovering system on ships which allows the exhaust heat of the main engine to produce steam while going out in the atmosphere. Every system, which is operated at high temperature, always has a risk of fire. This applies to EGB which has the inlet temperature of exhaust gases @ 300-400 deg. C.
Cleaver-Brooks continues to manufacture the most reliable and efficient firetube boilers in a number of popular styles and sizes, including the CBEX, CBJT, CBLE, ICB, and Ohio Special.
Nov 13, 2004 · A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.. The fire-tube boiler developed as the third of the four major historical types of boilers: low-pressure tank
Fig. 1: Number of soot-fire-damaged exhaust gas boilers in DnV- classed vessels 1982 84 86 88 90 92 94 96 98 00 2002 2004 70 60 50 40 30 20 10 0 e/overheating incidents per year ear This document, and more, is available for download at Martin's Marine Engineering Page - .dieselduck.net Fig. 5: Exhaust gas boiler – water tube type
tankers usually uses an exhaust gas heat exchanger at the base of the funnel and one or perhaps two watertube boilers. Saturated or superheated steam may be obtained from the auxiliary boiler. At sea it acts as a steam receiver for the exhaust-gas heat
The utility model relates to an exhaust silencer for a steam boiler whose main body is a cylinder-shaped silencing tube whose side walls are provided with exhaust holes. The utility model is mainly characterized in that the silencing tube is sleeve tubes with a plurality of layers; the circle cross sections of each sleeve tube is concentric; the lower end of the sleeve tube with an innermost
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Adjusting the "low fire offset" on the gas valve in even small increments can result in a significant increase in CO concentration. To avoid serious injury or death, DO NOT make any adjustments to the gas valve without monitoring the exhaust gases with a fully functional and calibrated flue gas analyzer.
Sep 28, 2013 · Every system, which is operated at high temperature, always has a risk of fire. This applies to EGB which has the inlet temperature of exhaust gases @ 300-400 deg. C. The most common type of Exhaust Gas Boiler (EGB) used on ships are water tube boilers.
Apr 05, 2019 · Reasons of Exhaust Gas Boiler Fire Following are the reasons but not limited to the ones mentioned below: Excessive Soot Accumulation Inside the Boiler Faulty Fuel Injection System, leading to incomplete combustion products reaching to the boiler
A fire-tube boiler is a type of boiler in which hot gases pass from a fire through one or more tubes running through a sealed container of water. The heat of the gases is transferred through the walls of the tubes by thermal conduction, heating the water and ultimately creating steam.. The fire-tube boiler developed as the third of the four major historical types of boilers: low-pressure tank