Difference between Water Tube & Smoke Tube Boilers
The table below gives a brief comparison of Water Tube and Smoke Tube Boilers-comparison of water tube and smoke tube boilers
Read MoreThe table below gives a brief comparison of Water Tube and Smoke Tube Boilers-comparison of water tube and smoke tube boilers
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Boiler Horsepower What is the boiler horsepower of a boiler generating 21,500 lbs of steam per hour at 155 psi? The factor of evaporation is 1.08. BHP = (LB/HR*fe)/34.5 BHP Boiler Horsepower BHP = (LB/HR*fe)/34.5 Lb/Hr Pounds per Hour BHP = 21500 * 1.08 / 34.5 Fe Factor of Evaporation BHP = 673 Cycle
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The term HRSG refers to the waste heat boiler in a Combined Cycle Power Plant. In its basic form these are bundles of water or steam carrying tubes paced in the hot gas flow path. These recover the heat from the gas to generate superheated steam, hence the name Heat Recovery Steam Generator.
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Jan 01, 2013 · New Jersey Boiler Code is commonly called NJAC 12 subchapter 4. In New Jersey, the term “boiler” means a closed vessel in which water is heated, steam is generated, steam is superheated, or any combination thereof, under pressure or vacuum, for external use by the direct application of heat [5]. The term “boiler”shall include fired or
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One is the boiler /machinery (B/M) coverage for the pressure side, meaning the tubes, drums, water level controls and safety relief valves. The second part of a boiler’s insurance is the property coverage, which covers the fire side, such as the fuel train, firebox, and refractory-related issues.
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But development of riveting and steel making processes soon made cast iron obsolete. Cylindrical boilers were later expanded to contain several passes and eventually developed into the fire tube boiler (Lobben, 1930). The water tube boiler was created at the end of 1800.
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I would also stay away from seal welding the tubes if this is a water tube boiler. You will likely only postpone the problem of changing the tubes in the future. For small package tube boiler there generally have rolled connections - WITH NO SEAL WELDING. Tubes are rolled between 8%-10% wall reduction - basically strain.
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Causes: Tube damage occurs due to the combination of thermal fatigue and corrosion. Corrosion fatigue is influenced by boiler design, water chemistry, boiler water oxygen content, and boiler operation. A combination of these effects leads to the breakdown of the protective magnetite on the ID surface of the boiler tube.
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Improve HRSG efficiency. Boiler deposits of iron oxide and ammonium bisulfate on the flue gas side can lead to tube fouling of HRSGs. This reduces the heat transfer efficiency and increases back pressure on an adjoining gas turbine, which can lead to higher operating costs.
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Apr 23, 2016 · The difference between fire tube boiler and water tube boiler can be done on various points. These points include types of fluid flows within the tubes, steam generation rate, floor area required for the steam generation, transportation, efficiency, fluctuating loads, operating cost etc. the knowledge of the difference about these two boilers is very crucial.
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Boiler tube metal corrosion can add to this deposit, but with good boiler operation and proper water treatment practices, tube metal corrosion is not usually significant. The insulating effect of a corrosion product deposit can cause tube metal overheating and subsequent failure.
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Dec 20, 2018 · Instead, a boiler turns water into steam. Boilers can be used to not only heat water, but also heat your home and even generate power. Boilers heat water very quickly, and like hot water heaters, are available in tanked and tankless versions. However, unlike hot water heaters, some boiler systems come with a hot water storage cylinder.
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Aug 31, 2014 · With the exception of corrosion fatigue, all the water-side boiler tube failure mechanisms occur under deposits. Get rid of the deposits and you also stop the water-side tube failures. Determining
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WHR Boiler deals with highly particulate flue gas. The place where burnt hot Ash at very high temperatures needs to be cooled down before its properly disposed.It requires Electrostatic Precipitator and ID Fan as every other boiler.
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The flow of gas is horizontal while the water is heated in vertically-arranged evaporator tubes, producing a natural, cost-effective circulation effect. With decades of OEM experience, cutting-edge research and development, and extensive field service experience, we are a global leader in the horizontal HRSG segment.
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The term HRSG refers to the waste heat boiler in a Combined Cycle Power Plant. In its basic form these are bundles of water or steam carrying tubes paced in the hot gas flow path. These recover the heat from the gas to generate superheated steam, hence the name Heat Recovery Steam Generator.
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May 17, 2017 · 3D Rendering of HRSG Assembly 4:45 Version. This feature is not available right now. Please try again later.
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The water may be applied with hand lances and/or boiler soot blowers. Dry out the boiler setting immediately after water washing to reduce damage to the refractory and other parts of the setting. Safety is always paramount; therefore, always be cautious when washing boiler firesides.
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If you are interested in reading one of our past articles, please contact us to request it. Boiler Biz is provided as a courtesy to HRSG owners and O&M staff only; therefore, no requests from consultants, suppliers or OEMs, please. Access 2001 Summer Specifications for
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The boiler-water and makeup treatment systems for drum-type boilers typically installed in cogen and combined-cycle systems with GTs rated 60 MW and below are less costly to own and operate. However, if the GT features water injection for power augmentation, a demineralizer already is required for the plant.
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Boiler Tube Failures - eecpowerindia. 2013-12-6 · Causes: Tube damage occurs due to the combination of thermal fatigue and corrosion. Corrosion fatigue is influenced by boiler design, water chemistry, boiler water oxygen content and boiler operation. Leads to the breakdown of the protective magnetite on the ID surface of the boiler tube.
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Oct 23, 2017 · Before placing the boiler in service the boiler water should be analyzed so as to determine if any undesirable portion of the cleaning be washed out of the boiler before it is placed in service.
Read MoreMonitor exhaust temperature, the boiler expert suggested, and keep it above the dewpoint for the fuel being burned. Run a dehumidifier in the exhaust-gas space after the damper is closed. Pipe and tube repair and replacement is a relatively common maintenance activity at combined-cycle plants—unfortunately. Material damage/wastage is
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as the position of the water and hot gases. In a fire tube boiler, hot gases are inside the tube and water is at outside the tube, while water tube boiler has water inside the tube and gases on the outside. Fire tube boilers produce lower rate of steam compared to water tube boilers. The focus for this will be on HRSG with water tube boilers.
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Heat Recovery Steam Generators (HRSG) Various types and designs Shell and tube exchanger Water tube boiler Multiple drum system low pressure (LP) medium pressure (MP)
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In water tube boilers, the way the water is recirculated inside the boiler before becoming steam can be described as either natural circulation or forced circulation. In a water tube boiler, the water is recirculated inside until the vapor pressure of the water overcomes the vapor pressure inside the stream drum and becomes saturated steam.
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Benefits of Clean Water •Eliminates need for blowdown and its treatment (3% energy savings) •Extended boiler life (10 - 15%) •Reduced maintenance and downtime •Eliminates tube scaling •Minimize need for active chemical treatment •Minimizes chemical costs Clean water benefits the entire plant
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Water Tube Boiler Components of Water Tube Boiler. The water tube boiler can be built with boiler shell, burner, mud drum or mud ring, furnace, safety valve, strainer, sight glass, feed check valve, steam stop valve, etc. Boiler Shell: This shell is the external cylindrical part of a pressure container.
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Jun 23, 2020 · A high-pressure boiler is defined as a boiler in which steam or vapor is generated at a pressure equal to or greater than 15 psig, or a boiler in which water is heated at a temperature of 250°F and a pressure greater than 160 psig, when water is heated for use external to the boiler itself. High-pressure High Pressure Boiler Inspection Procedures (with Checklist) Read More
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Surprisingly, hideout and boiler tube corrosion can also occur in HRSGs where the heat flux is much lower than in coal- or oil-fired units. This is because there may be accumulation of corrosion products or inadequate mass flow through some generating tubes; particularly during duct burner firing.
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Jul 01, 2011 · For the multi-pressure drum HRSG examined here, boiler water treatment for the IP and HP evaporators has largely evolved from the chemistry developed for conventional steam generators.
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Heat Recovery Steam Generators. RENTECH Boiler Systems offers a full range of custom designed HRSG boiler systems to meet your most demanding requirements. Custom engineered HRSG for gas turbines from 1MW to 40 MW; Factory assembled natural circulation water tube designs; Cross flow or water wall boiler designs
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The economizer is a bunch of horizontal water tubes usually located in the back pass or second pass (after the primary superheaters and reheaters) of the boiler through which the feed water enters the boiler to absorb the residual heat from the exhaust flue gas and transfer it to the steam production cycle. This process helps in improving
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SCOTCH MARINE (FIRE TUBE) BOILERS Our two-pass, three-pass or four-pass Scotch Marine(Fire Tube) boilers are available in dryback, wetback, steam or hot water versions; from 15 to 800 hp with pressures to 300 psig. Hurst Scotch Marine boilers are rated to 81% minimum efficiency.
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Once-through Boiler Characteristics. The once through boiler has high load response characteristics due to the fact that it does not have a drum and has a much lower water inventory. In the once through boiler, many times the load change response is dictated by the firing system and its controls rather than the boiler, per-say.
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Aug 31, 2010 · Many units operated under older feedwater and boiler water chemistry guidelines (pH between 8.8 and 9.2 with low dissolved oxygen) derived from mixed metallurgy system and industrial boiler
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Over 85 years of diverse industry experience, our commitment to develop innovative boiler water treatment technologies continues today. Chemical treatment coupled with 3D TRASAR technology provides comprehensive boiler water treatment solution mitigating scale and corrosion of the boiler system.
Read MoreAbout Our Blog. Clarity’s Water Treatment blog is dedicated to topics having to do with the water treatment industry. We cover popular water treatment topics that include boiler water, cooling water, and waste water treatment; as well as related topics like odor control, smart release technology, cooling tower cleaning, legionella remediation and environmentally friendly water treatment options.
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4 High−temperature water boiler − a water boiler intended for operation at pressures in excess of 160 psi (1.1 MPa) and/or temperatures in excess of 250°F (120°C). 5 Heat recovery steam generator (HRSG) − a boiler that has as its principal source of thermal energy a hot gas steam having high−ramp rates and tem-
Read MoreOxygenated treatment (OT) is a technique used to reduce corrosion in a boiler and its associated feedwater system in flow-through boilers. With oxygenated treatment, oxygen is injected into the feedwater to keep the oxygen level between 30-50 ppb. "Common injection points are just after the condensate polisher and again at the deaerator outlet."
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