AFBC BOILER CBL s AFBC Boilers offer the most effective solution for process heat and power generation They can burn on various fuels with a combustion efficiency of over 85% irrespective of ash content Advantages of AFBC BOILER High efficiency Fast response to load variation/fluctuation Low on operating cost Simple operation and quick start up
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Get PriceAFBC Boilers Losses discussions 1 AFBC BOILERS PERFORMANCE IMPROVEMENT By Manohar Tatwawadi Director 91 9372167165 total output power solutions 08 Aug 19 1total output power solutions 2
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Get PriceAfbc Boiler Operation Boioer snowman ro Maintain drum level at normal recommended level Initally the top bed temperature will raise and at the time of mixing temperature drops and bottom temperature raises at the time of mixing Bed super heater drains Check the following valves are kept in open condition
Get PriceStart up inspection of afbc boiler 1 All main hole doors are closed 2 all drives drag chain pocket feeders are proper running condition 3 All pneumatic damper discharged damper and compartmental damper are in proper working condition 4 All interlock & protection are in line 5 Check availability of coal of specifications size 4mm
Get PriceIBE In Bed Evaporating Coils In some FBC Boilers complete furnace is covered with evaporator coils Coils are generally fitted in 2 nos inner & outer 15 What is the standard size of Bed materials used in AFBC Boilers Bed material is Crushed refractory of size around 0 85 to 2 36 mm & having fusion temperature > 1300 Deg Cdf
Get PriceThere is an air box with eight Bed Coils Life In Afbc Boilers why bed coil failure in afbc life of bed coil in afbc boiler primeragildenburgh Boiler Presentation Almost all AFBC/ bubbling bed boilers use in bed evaporator tubes in the bed of limestone sand and fuel for extracting the heat from the bed to maintain the bed temperature The bed
Get PriceFailure Analysis of Bed Coil Tube in an Atmospheric The bed coil tube of AFBC boiler operated for about 1 000 h has the dimensions of 510 mm OD and 70 mm thickness The fuel used in the boiler is coal of size 6 mm In the AFBC system the water from the boiler drum is made to run through six down comers It enters the inlet header of bed coils and then passes through waterwall to outlet header
Get PriceThe bed coil tube of AFBC boiler operated for about 1 000 h has the dimensions of 51 0 mm OD and 7 0 mm thickness The fuel used in the boiler is coal of size 6 mm In the AFBC system the water from the boiler drum is made to run through six down comers It enters the inlet header of bed coils and then passes through water wall to outlet header
Get PriceThe bubbling type AFBC boiler offers efficient cost effective reliable and viable alternative to conventional solid fuel fired boilers for industrial applications With over 280 installations across the world the boiler offers benefits like fuel flexibility high efficiency low emissions and reduced capital and operating expenses
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Get Price13 11 2024 0183 32 Brief Construction Features of AFBC Boiler The bed coil tube of AFBC boiler operated for about 1 000 h has the dimensions of 510 mm OD and 70 mm thickness The fuel used in the boiler is coal of size 6 mm In the AFBC system the water from the boiler drum is made to run through six down comers
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Get PriceThe CFBC boiler has more advantages than AFBC boiler a High efficiency Due to the intense mass and heat exchange in the fluidized bed unburned coal particles can increase the residence time in the furnace by multiple cycles which is very beneficial to the fuel burnout b Fuel flexibility
Get PriceCoal Biomass Fired Water Tube Boiler Type steam boiler / hot water boiler Capacity 6 30 ton / 4 2 21MW Pressure <1 6MPa Fuel Biomass Fuel Rice Husk Bagasses Solution Textile plant Food Industry Heating Supply Rice mill Circulating Fluidized Bed Boiler Type steam boiler / hot water boiler Capacity 10 400 ton / 7 168MW Pressure <9 81MPa
Get PriceBed coil shield we are leading manufacturer and suppliers of bed coil based in south africa bed evaporator coil shield is widely used in afbc boilers fluidized bed area to minimize wear rate we ensure durability and quality the offered coil shield is well known among patrons for its flawless performance amp long service life learn more
Get PriceThe high concentration of bed material along with staged air supply ensures that bulk combustion temperatures do not exceed 950°C making it environment friendly lesser production of NOx means of utilizing coal It adopts a process different from Pulverized Fuel where coal is milled to fine powder similar to Continue Reading Anonymous
Get PriceThe boiler is designed for fluidising velocities up to 4 5 m/s generating high turbulence and resulting in good mixing of hot bed material with fuel and recirculated fly ash The height of the bed is kept constant through removal of the produced bed ash as a function of the differential pressure between the airbox and freeboard
Get PricePresentation on CFBC Boilers SlideShare Dec 11 2024· Difference Between CFBC & AFBC CFBC boiler Flue gas velocity 3 7 to 4 3 m/sec Over bed feeding U beam Technology No bed coil UBC Less than 2% Efficiency high 88% Clinker formation chances low Tube erosion high as compared to AFBC Ash recycle unburned heavy particle system
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Get PriceStudded Bed Coils & Tubes 1 2 3 Studded Tubes are used to increase the Surface Areas to achieve higher Heat Transfer Rates They are used in Fluidized Bed Coils and Fluidized Bed Superheaters They are also used in Refineries as Reheaters We use Automatic Stud Welding Machines using Drawn Arc method capable of welding studs up to max 13mm
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Get Price10/25/2024 1 44 PM The major reason is caustic gouging in bed tubes of these high pressure AFBC Boilers Corroision in the boiler is prevented by maintaining the boiler water condition in such a way that the magnetic layer is maintained Boiler water has to be at Ph 9 to 10 2 in order to preserve the magnetic layer of steel This is done by
Get PriceFLUIDIZATION PROBLEMS FACED • Naturally the bed material size will be right from fly ash dust to coarser ash • If the boiler is provided with over bed start up burners the height of the bed material has to be kept to 600 700 mm in order to cover up the bed coil • The bed plate is designed for a pressure drop of 300 mm at MCR
Get PriceFBC Bubbling Circulating AFBC PFBC ACFBC PCFBC V=3 5 m/sec 1 2m/sec up to 10m/sec — AFBC Boiler • In AFBC boiler coal is cursed to a size of 1 6mm … Quick inquiry Email Us A Case Study on AFBC Boiler Shutdown Audit by Mr K K Pratibhan …
Get Pricethe 100% over bed firing for any type of fuels are not worth for afbc boiler some customers are buying the afbc boiler for bio mass over bed firing with 30 to 50% of under bed combination of coal firing some other few customers are only buying the 100% over bed firing afbc without experience in hot temperature corrosion and carbon loss unburnt …
Get PriceCompared to pulverized coal fired boilers the AFBC boilers are more susceptible to erosion along the fireside path The erosion is caused by the direct impingement of in bed particles on the tube surfaces Super heater coils of an AFBC boiler are found to be affected extensively by solid particle erosion
Get PriceThe bed inventory should be more or less constant like boiler drum level This is the key to stability of the combustion in AFBC / CFBC boilers Flue gas does not transfer heat directly to bed coil It is the bed material that transfers the heat to the bed coil Less bed height causes erratic combustion
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