Fire Tube Boilers Also referred to as smoke tube boilers, shell boilers, package boilers Multiple gas paths - 2, 3 and 4 pass Internal furnace or fire box as the 1st pass Dry back or wet back design Single fuel or dual fuel design Little or no steam separation equipmentGet Price
Answer (1 of 5): What causes the black smoke in gas-fired boilers? A bad fuel-air mixture. Natural gas contains approximately 94% methane (CH4) with some trace elements such as ethane and propane. Complete combustion, or conversion of the potential heating value of methane requires two moleculesGet Price
May 29, 2021 · Draught fan failure-Air supply fan failure operates audible and visual alarms. High flue gas temperature- Burner Stopped and the alarm was given. Smoke density-Emitted smoke through uptake, being monitored and if deviate from …Get Price
Feb 25, 2014 · combustion in boilers 1. Combustion Theory Lecture 12 Combustion in Boilers 2. Learning Outcomes 1. Overview of general boiler designs and applications – Heat balance/heat transfer/ heat availability/excess air/size and shape of the combustor – Boiler configurations: Smoke tube (Fire tube) and water tube/ Water wall designs Natural Circulation and Forced …Get Price
Jan 07, 2022 · Boiler types. 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. Firetube boilers are used for auxiliary purposes to provide smaller quantities of low-pressure steam on diesel engine powered ships.Get Price
Shell boilers may be defined as those boilers in which the heat transfer surfaces are all contained within a steel shell. Shell boilers may also be referred to as 'fire tube' or 'smoke tube' boilers because the products of combustion pass through the boiler tubes, which in turn transfer heat to the surrounding boiler water.Get Price
Boiler types The types of exhaust gas boilers utilising the diesel engine exhaust gas heat may, in principle, be divided into two main groups: • Water tube boilers • Smoke tube boilers Water tube boilers This is the boiler type most frequently used – often in connection with high exhaust gas heat utilisation. The exhaustGet Price
Oct 30, 2020 · Types of waste heat boiler. According to the type of fluid in the tube: smoke tube waste heat boiler (or called fire tube) and water tube waste heat boiler. Boiler water circulation methods are divided into: natural circulation, forced circulation, and tubular circulation.Get Price
Tube failure is one of the major problems occurring in the boiler. 30% of tube failures occur in the economizer. Economizer tubes face fireside (external) and waterside (internal) corrosion. The fireside corrosion is a function of flue gas components, tube …Get Price
May 04, 2009 · The tube failures in a boiler during initial phase of operation are different from the types that occur after prolonged operation. During the initial period of operation of boiler the type of tube failures seen are short term overheating, weld failures, material defects, chemical excursion failure, and sometimes fatigue failures.Get Price
Apr 05, 2019 · 11) If the water level is dropping fast and temperature across the boiler are rising, that means it is going for a hydrogen fire. 12) Stop the boiler water circulation pumps and close the valves. 13) Check the exhaust for kind of smoke coming. 14) Boundary cooling can be adopted to cool the fire.Get Price
A smoke tube boiler is one in which hot exhaust gas from the engine passes through tubes running within a sealed container of water.Get Price
Jul 13, 2010 · Flush up the boiler and re-inspect the plugs for leaks under full steam pressure. Stop the burner, allow the boiler to cool and remove the soot. Allow boiler to depressurize, and open the blow down valve to drain the boiler. Enter the boiler flue box and cut a hole in the side of the relevant smoke tube.Get Price
Answer (1 of 10): Boiler tube leakage is very serious problem and whenever it is noticed i.e. by increase in DM water consumtion or decrease in the steam outlet temperature or by hissing sound at some floor or lowering of fire ball temperature spits(if its in …Get Price
Chapter 14 - Boiler System Failures. Deaerator Cracking. Feedwater Line Erosion. Economizer Tubes. Failures Due to Overheating. Failures Due to Corrosion. Successful, reliable operation of steam generation equipment requires the application of the best available methods to prevent scale and corrosion.Get Price
Comparison of Coil Type and Shell Type Boilers; Improving Direct Efficiency of Solid Fuel Fired Boilers through Automation; Boiler Efficiency : Introduction and Method of Calculation; What is a Boiler : Introduction to Boilers; Comparison of Water Tube and Smoke Tube Boilers; Types of Boilers and Boiler Classification; Boiler Safety and Role of Get Price
Introduction. Fire tube boilers, also known as smoke tube boilers, are the most common type of industrial boiler employed today. Compared to water tube boilers, they are much more suitable for smaller plant applications because they can better cope with sudden high demand steam fluctuations.. Combustion occurs within a furnace with the exhaust gasses (flue-gasses) …Get Price
The boiler room log lists boiler operation data that can be used to increase boiler safety and efficiency as well as identifying a potential malfunction. 8-A boiler room log is used to record information regarding operation of the boiler during a given period of time. The number and frequency of the checks to be performed depend on the plant.Get Price
Aug 28, 2021 · In essence, any type of boiler can be a 3-pass boiler if we take care of specific design considerations. However, the fire tube/ smoke tube 3-pass boilers are seen most commonly in the industries due to their ability to handle steam …Get Price
Tube Failures in High Pressure Boilers - Bright Hub EngineeringGet Price
Feb 25, 2019 · These localized hotspots weaken the tube material over time and would eventually lead to boiler failure. The soot removed from the tubes is blown out by the flue gases, or can be trapped if the blower has a soot collector. …Get Price
High pressure boilers (1) - SlideShare. The high-pressure boilers are widely used for power generation in thermal power plants. Example: Lamont boiler, Benson boiler, loeffler boiler, Babcock and Wilcox boiler In high-pressure boiler if the feed-water pressure increases, the saturation temperature of water rises and the latent heat of vaporization decreases.Get Price
Exhaust Gas Boiler on Ships - Marine EngineeringGet Price
The smoke tube boiler is a type of boiler where flue gas is passing on the inside of many tubes, which creates many challenges for a fouling prevention It was concluded that the appearance of defects on the boiler tube sample indicates cavitation type corrosion failure. Cavitation damage superficially . Fire Tube Boiler (3 Pass) Explained Get Price
Tube Failures in High Pressure Boilers - Bright Hub EngineeringGet Price
Dec 09, 2015 · Exhaust gas boiler (EGB or EGE) or economiser described in this article is a smoke tube boiler with steam space, used for heat recovery from main engine exhaust gas. An illustration of the boiler is shown in figure below. The exhaust gas boiler is designed as a vertical boiler with a cylindrical shell surrounding the boiler tubes and water drum Get Price
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 Get Price
Smoke tube exhaust gas economizer/boiler EMB/EME-VST. Vertical smoke tube exhaust gas boiler resp. economiser; Fulfils partly the function of a silencer in the exhaust gas system. Own steam space and therefore it works independently from other boilers in the system.Get Price
Boiler and economiser Boiler types There are two different types of boiler available; water tube boilers and smoke tube boilers. A smoke tube boiler is one in which hot exhaust gas from the engine passes through tubes running within a sealed container of water. In water tube boilers, water circulates in tubes heated externally by hot exhaust gasGet Price
May 13, 2016 · Smoke tube boiler and water tube boiler are the main types of industrial boiler in global market. They are differ from not only structure, but also usage. Smoke tube boiler. Smoke tube boiler, as its name suggests, of which smoke or heat flowing through boiler tubes and the water surrounds outside of the tubes to be heated and turned into steam.Get Price
May 04, 2009 · Erosion. Fire side corrosion (Called also as High temperature Corrosion) Lack of quality control. These lead to twenty-two primary causes that can cause a tube failure in a high pressure boiler: Short term overheating failure. Long term overheating failure (called also as creep failures) Dissimilar metal weld failure.Get Price
7. Cochran Boiler: A Cochran boiler is one of the best popular types of vertical multi-tubular, fire- tube boiler. The Cochran boiler is made in sizes upto 2.75 metre diameter and 5.8 metre height. It has a maximum evaporative capacity of 3640 kg of steam per hour, from cold feed, when burning 568 kg of coal per hour.Get Price
Boilers are very good devices used to produce steam by providing energy in the form of heat to the water. The boiler discussed in this report is a fire tube boiler which is …Get Price
The principle of the boiler is based on a common water and steam space and separate sections for oil firing and exhaust gas. If several engines are utilized, the boiler can be delivered with several separate exhaust gas sections. The boiler comprises smoke tubes both for the oil fired and the exhaust gas section. From the top of the boiler Get Price
Aalborg OC is a high performance, combined oil and exhaust gas-fired boiler, with a 750-5,000 kg/h capacity of the oil-fired section at 9 bar(g) design pressure. Aalborg OC is a vertical,older designs of composite boilers. cylindrical boiler with an exhaust gas section consisting of bare smoke tubes while the oil-fired section features pin tubes inGet Price
Anymore, I use stainless pipe and elbows on about every natural draft appliance we service and/or install. We used to see 24ga smoke pipe on units that has been in use for 20 years with no problems. That was in the days of good steel, standing pilots and high flue gas temperatures keeping the pipe nice and dry.Get Price
Water Tube Boiler the Parat top fired water tube boiler is a fully automatic steam boiler. a sufficiently dimensioned steam drum makes the boiler suitable for evaporating steam from additional external exhaust gas boilers. the design and performance is a result of solid experience and high technicalGet Price
Boilers can be classified as follows. According to the flow of water and hot gases – fire tube (or smoke tube) and water tube boilers. In fire tube boilers, hot gases pass through tubes which are surrounded with water. Examples: Vertical, Cochran, Lancashire and Locomotive boilers. There may be single tube as in case of Lancashire boiler or Get Price
Exhaust Gas Boilers And Economisers for Marine . Liming 0183; The consequences of starting a circulating pump with the exhaust gas boiler tubes at elevated temperatures could be disastrous. On vessels with an exhaust economiser by pass valve, water temperature is a critical factor in preventing condensation and acid formation on the gas side.Get Price
May 22, 2015 · With tangent tube construction a failed tube can be plugged and the boiler operated normally without further attention. Sometimes it is difficult to find the failed tube, in an exhaust gas boiler with closely fitted finned tubes for example, a method, which has found success, is ultrasonic detection.Get Price
Watertube boilers, on the other hand, need an economizer section in the gas passes in order In shell boilers with a working pressure of between 7 and 17 bar the the exhaust gases and the water temperature, the boiler exit gas tem READ MORE. Boiler. Table- 20: Factor "α" for minimum thickness of water type, super-heater tube, re-heater tube Get Price
Jul 30, 2009 · Most of the fire tube boilers now come in a complete package.The main parts of the package are : oil burners. fuel pump. forced draft fan. feed pump. automatic control system. Boiler mountings. The most basic type of a package boiler is single passage three pass design. One such boiler is shown in the figure.Get Price
Dec 09, 2015 · Exhaust gas boiler (EGB or EGE) or economiser described in this article is a smoke tube boiler with steam space, used for heat recovery from main engine exhaust gas. An illustration of the boiler is shown in figure below. The exhaust gas boiler is designed as a vertical boiler with a cylindrical shell surrounding the boiler tubes and water drum Get Price
Smoke Tube Boiler | Internal Furnace Boilers Explanation Get Price
Fire-Tube Boiler (~1800) The fire tube boiler, the oldest design, is made so the products of combustion pass through tubes surrounded by water in a shell. The furnace/flame volume can either be inside or external to the shell that contains the water. The upper steam capacity of fire tube boilers is about 20,000 Ibm/hr, and the peak pressureGet Price
Smoke tube boiler cleaning. In heating plants and saw-mills, a cost-efficient and compact way to recuperate the energy in the hot flue gas, is by means of a smoke tube boiler. As the name suggests in a smoke tube boiler, the flue gas passes inside tubes, surrounded by a water mantle cooling the smoke tubes.Get Price
Boiler Types Fire Tube Boiler. One of the most basic types of boilers, the fire tube boiler is also one of the oldest designs. The burner shoots the flame into a tube that is immersed in water contained in the main vessel of the boiler itself. There may be multiple fire tubes.Get Price
Gas/Oil Boiler (fire tube boiler) Capacity：0.5-50t/h, 350-28000kw. Horsepower：30hp-3000hp (bhp) Pressure：0-3.8Mpa, 0-38Bar. Fuel：Natural gas, lpg, diesel, heavy fuel oil, crude oil, dual fuel, exhaust gas. WNS series：Horizontal package shell boiler / fire tube boiler / gas diesel oil burner boiler / automatic steam or hot water boiler Get Price
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, …Get Price
The following boiler tube failure mechanisms are some of the most common that occur on modern operating boilers. We've organized these into three sections three pass smoke boiler / smoke free hot water boiler / what is smoke tube and fire tube boilers / tubular smoke boiler / fish feed production line oil fired smoke tube boiler in Afghanistan Get Price