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  • What is the temperature of the steam in the boiler? - Quora

    To generate steam, you have to reach at least 100C, or 212 degrees Fahrenheit. However, the more pressure that exists in the boiler, the higher the temperature can be.Learn More

  • Auxiliary Boilers - SlideShare

    Jun 08, 2018 · Steam boiler efficiency depends upon the size of boiler used. A typical efficiency of steam boiler is 80% to 88%. 30. There are 6 important points that must be considered in order to improve boiler efficiency. 1. Feed Water Temperature To improve any system's efficiency, it is important to maintain the standard of all the inputs of that system.Learn More

  • Steam Propulsion

    All D-type boilers are designated as uncontrolled superheat boilers because all the steam generated by the boiler must pass through the superheater. Superheater outlet temperature is a result of the combustion gas flow in proportion to the total amount of steam flow through all ranges (0 - 120%).Learn More

  • Marine Steam Boilers Steam and Water System

    The water temperature must therefore not be below 130°C if low temperature corrosion shall be avoided. Since ships mostly are equipped with open feed water systems where the feed water temperature is not higher than 50-80°C this feed water may be mixed with saturated water from the O il F ired B oiler or from a steam separator drum, in proportions so that the water entering the EGE is minimum 130°C.Learn More

  • Boiler Efficiency - an overview | ScienceDirect Topics

    Boiler efficiency is a measure of the goodness of the chosen process and equipment to transfer combustion heat to the heat in steam. Boiler efficiency can be defined as the ratio of the useful heat output to the total energy input. (3.1) η = Q abs Q in. where. η is boiler efficiency.Learn More

  • How to Destroy a Boiler -- Part 1

    Typical industrial boilers are "natural circulation" boilers and do not utilize pumps to circulate water through the tubes. These units rely on the differential density between hot and cold water to provide the circulation. As the water removes heat from the tubes, the water temperature increases and it rises to the boiler steam drum.Learn More

  • Marine Steam Boilers - Boiler Construction

    MARINE STEAM BOILERS precision than is possible in the ordinary Bessemer bottom-blown converter ; it is on that accoUnt more generally used where the output of the steel foundry is small and castings of specified quality are required. . The charge of liquid pig-iron in the converter processesLearn More

  • Composite Boilers - Marine Engineering Study Materials

    Apr 29, 2014 · Composite boilers are often used in conjunction with Diesel machinery, since if the exhaust gas from the engine is low in temperature due to slow running of the engine and reduced power output; the pressure of the steam can be maintained by means of an oil fired furnace. Steam supply can also be maintained by these types of boilers when the Learn More

  • Types of Marine Boilers and Difference Between Water Tube

    Mar 12, 2013 · 1) These types of boilers have light weight construction. 2) Efficiency compared of the smoke tube boilers is much higher and those can be used to generate the high pressure steam. 3) Efficiency of combustion in this type of boiler is always good. 4) Thermal stresses are less as the water circulation is very good inside the tubes.Learn More

  • Steam Boiler | Working Principle and Types Of Steam Boiler

    Steam boiler is a cylindrical shape closed vessel which has sufficient capacity to contain water and steam.Generally, water or other fluid is stored in steam boiler to generate steam.This water or fluid is heated by flames or hot gasses which are produced by combustion of fuels and consequently steam is generated in the boiler at different Learn More

  • Marine Boiler Types- Various Advantages

    Marine boilers are of two types namely the water tube boiler and the fire tube boiler. The water tube type boiler is used for high-pressure, high-temperature, high-capacity applications. The Main boiler design depends on its application, ie. for motor ships, a small fire tube boiler would be satisfactory.Learn More

  • Boiler Combustion | CleanBoiler.org

    High flame temperatures and intimate air/fuel mixing are essential for low CO emissions. Some NOx control technologies used on industrial and commercial boilers reduce NOx levels by lowering flame temperatures by modifying air/fuel mixing patterns. The lower flame temperature and decreased mixing intensity can result in higher CO levels.Learn More

  • How do Boilers Work & What is their Use on Ships? - Bright

    Jul 29, 2009 · In this article, we look at the construction and operation of the marine boilers found on both steam-powered and fuel oil powered ships. The steam generation process is explained and important key phrases are defined. The various uses for steam aboard ship are described, and the difference between the water tube and fire tube basic designs in explained. Learn about how marine boilers …Learn More

  • What is the highest temperature that steam can attain in a

    There are two parts in a steam boiler, the primary boiler, then the secondary boiler or "super heater". The super heater can raise the temperature above the boiling point of water. Nuclear Power plants can go as high as 800C. The higher the differLearn More

  • Hotwell Boiler feedwater cascade tank - DieselShip

    Aug 31, 2021 · Hotwell filling. >> Hotwell Boiler feedwater cascade tank level is automatically maintained using a automatic filling valve which is controlled by float switches. the float switches read the water level and control opening / closing of the valve. A PID controller is used where the steam demand is very high such as Oil tanker and cruise ships.Learn More

  • How to Destroy a Boiler -- Part 1

    Trapped moisture quickly becomes steam and causes the refractory to spall as the steam escapes. The standard warm-up curve for a typical boiler does not increase the boiler water temperature over 100°F per hour. It is not unusual for a continuous minimum fire to exceed this maximum warm-up rate.Learn More

  • Marine Boiler Feedwater- Treatment & Purity Control

    Summarized below marine boiler detail Info pages: Requirement for various boiler types - water tube boilers and more; The watertube boiler is employed for high-pressure, high-temperature, high-capacity steam applications, e.g. providing steam for main propulsion turbines or cargo pump turbines.Learn More

  • Marine Boilers - Marine Engineering Knowledge Part 1

    Oct 13, 2015 · What is the meaning of marine boilers ? Boiler is a pressure vessel used on ships in which the water is heated to evaporate and generate the steam and the unit is so arranged that the generated steam accumulated in it. The two main types are water tube and fire tube. What is the boiler mounting ?Learn More

  • What Is Marine Boiler? | Principle of Marine Boiler

    Apr 17, 2021 · Marine boilers are of two types such as water tube boilers and fire tube boilers. Water-tube-type boilers are used for high pressure, high temperature, high capacity applications. The main boiler design depends on its application, ie. For motor ships, a small fire-tube boiler would be satisfactory. A boiler is a machinery that has been in use Learn More

  • (BOILERS) ON SHIPS | Marine Boiler-

    Mar 16, 2020 · PT Indira Dwi Mitra – Specialist Expert in Project Boiler Marine Heater,Marine boilers used in ships today are mostly for auxiliary purposes in vessels that run on marine diesel engines or diesel electric propulsion. In case of ships using steam turbines (mostly found in high speed vessels used by navies), boilers are a part of the main propulsion system.Learn More

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