Circulating fluidized bed cfb boilers boilers product lineup. Conventional boilers for power generation can use only fossil fuels, such as highgrade coal, oil, and gas. A modern concept in steam generators, these boilers are designed and manufactured for a wide range up to about 550 tph capacity. Solids separator hot cyclone plate type plate type uncooled hot cyclones with loop seal assembly are adopted in enmas gb cfbc boilers. All this without compromising efficiency and with reduced emissions. Fbc fluidized bed combustion is a combustion technology used to burn solid fuels in steam boilers. At the bottom of the boiler furnace there is a bed of inert material. Circulating fluidized bed cfb boiler process youtube. Circulating fluidized bed cfb combustion boilers gives the flexibility for combustion of a wide range of coals and alternative fuel sources. A proven concept in steam generators, these stateoftheart systems are designed and manufactured for a. This chapter is devoted to basic aspects of circulating fluidized bed combustion cfbc.
Steam boiler definition, working principle, types, and. What is the difference between afbc and cfbc boiler,cfbc. As regards cfbc boilers, these are comparatively newer generation of technology and explosion. Now they are working well, and i must say, zg boiler gives us very timely and helpful support. What is the difference between afbc and cfbc boiler. Hot air is necessary for rapid combustion in the furnace and also for drying coal in milling plants. What is a steam boiler working principle, types of steam boilers. Circulating fluidized bed boiler is consisting of combustion chamber, separator, fly ash circulating system, superheater, convection bank, economizer, and air preheater. Cfbc boiler stands for circulating fluidized bed combustion boiler, the furnace is pressurised and the furnace gas is recirculated to capture the unburnt carbon, to increase the thermal efficiency of the boiler. The general costs of cfbc technologies for coalfired power generation are summarized in table 11. Combustion in a cfbc boiler tapash nag tn 28 nov 20 v0 1 2. We have over 70 years experience of industrial steam boiler and autoclave,and we have a professional installation and aftersales staff for products. Simulation training system of a circulating fluidized bed boiler. Developments in circulating fluidised bed combustion.
Generally, a steam boiler is a type of closed container, designed with steel for heating the water to generate steam by some energy source like burning of fuel with eventually. Air preheater is a heat transfer surface in which air temperature is raised by transferring heat from other media such as flue gas. Cfbc is listed in the worlds largest and most authoritative dictionary database of abbreviations and acronyms. In fluidized bed combustion boiler technology when air or gas is passed through an inert bed of solid particles such as sand supported on a fine mesh or grid, the air initially will seek a path of least resistance and pass upward through the sand. Atmospheric and pressurized fluidised bed boilers design. Characteristics of the internally circulating fluidized bed boiler.
Fbc boilers bureau of energy efficiency 145 figure 6. Key benefits are fuel flexibility, reduced emission and lower bed temperature. Critical velocity at which the pressure drop across the bed equals the weight of particles per unit cross sectional area of bed. This article gives a brief description of the working of a cfb boiler.
Cfbc needs huge mechanical cyclones to aquire and recycle the high amount of bed material, which need tall boiler. Circulating fluidized bedcfb boiler working principle. The features of circulating fluidizedbed boilers are described below. Where the energy gain of the working fluid water and steam is compared with the. Afbc and cfbc boilers operation manuals boilersinfo. Different versions industrial boilers ore developing with gradual change in their design of different parts and to optimize the thermal efficiency, fuel multiplicity and to sustain with environmental norms, with cost effectiveness for installation operation and maintenance. With more than 30 years of manufacturing boilers, the company has formed more than 400 varieties of gas boilers, biomass boilers, coalfired boilers, heatconducting oil boilers, etc.
Cfbc circulating fluidization bed combustion boiler. Today we discussed about the cfbc circulating fluidization bed combustion boiler pressure parts and their uses. What is the difference between an afbc and cfbc boiler. To prevent this erosion a thin layer of refractory covers the lower half of the furnace, upper transition areas and the cyclone. Cfbc characteristics operates under special fluid dynamic condition solid particles are mixed through furnace at a velocity exceeding the average terminal velocity of the particles major fractions of solids are captured by cyclone high recycle rate intensifies solid mixing and evens. Cfbc boiler is a singledrum, natural circulation, top supported, and membrane wall construction. It is reported that circulating fluidized bed boilers are more an more appeared in industries and commercial fields. Why choose zg as steam boiler working principle pdf manufacturer. Circulating fluidized bed combustion has given boiler and power plant operators a greater flexibility in burning a wide range of coal and other fuels.
Afbc atmospheric bubbling fluidized bed combustion cfbc circulating fluidized bed combustion long answer. The water in the boiler should have a ph level of between 7. Afbc atmospheric fluidized bed combustion boiler cold. The boiler with its simplified, costeffective and efficient design provides improved performance. Cfbc boilers without external heat exchanges are therefore becoming more prominent 1. Difference between afbc and cfbc boiler pdf dear all, please tell me what is different between afbc boiler amp cfbc boiler. In 2010, we bought two sets of 280 ton cfb boiler form zhengzhou boiler co. Cfbc working principle the circulating fluidized bed combustion technology, cfbc, uses greater combustor superficial gas velocities than the bubbling bed. Cfb boilers from mitsubishi hitachi power systems mhps are able to combust a wide range of fuels, including bituminous. M i r e k, czestochowa university of technology, poland doi. Here ash leaving with flue gas is recirculated to combustion zone.
Triad highly recommends that boiler feed water be treated before it enters the boiler. Cfbc boilers are mostly claimed to be more cost effective than afbc boilers for industrial uses requiring more than 80110 thr of steam. Cfbc boiler stands for circulating fluidized bed combustion boiler. We have over 70 years experience of industrial steam boiler and autoclave,and we have a. Pc boiler for 600 mw projects and circulating fluidizedbed combustion cfbc boiler for 300 mw projects. Tech in thermal power engineering, poojya doddappa appa college of engineering gulbarga, yadgir, karnataka 585202, india. This section is all about afbc and cfbc boilers circulating fluidised bed combustion operation manuals. Performance guarantee test assessment of cfbc boiler. Grid nozzles for primary air used to fluidize the bed material inside the furnace can be seen. Circulating fluidised bed combustion boiler cfbc enmas. Handle high sulphur, high ash and high moisture fuels, petcoke, sludge, washery rejects, lignite, biomass.
Boilers bureau of energy efficiency 27 syllabus boilers. For pcc and cfbc boilers, oxyfuel combustion systems that produce high purity. Afbc boiler is a very developing technology now these days this technology is widely used in the industrial boiler for the purpose of efficient and clean burning of coal and other fuel for steam generation. However, the basic principles behind the cfbc in volve the external. The cfbc boiler supplied by chinese company has been in operation for about 3 months prior to my visit to this plant. Cfbc boiler manufacturer, steam boiler working principle pdf faq about steam boiler working principle pdf 1.
Sitong low pressure circulating fluidized bed boiler is a high efficiency. Sumitomo shi fw is the global leader in cfb technology and has supplied a full range of cfb boilers totaling 36 gwe in power capacity and 30 million hours of. The vapor generated may be delivered at lowpressure for the industrial progression work in sugar. Abstract the cfbc boiler is said to be the second generation fluidized steam power plant generates electricity by using fuel as input. This boiler is a new generation of low speed circulating fluidized bed boiler based on domestic and international advanced technology and experience. Afbc atmospheric fluidized bed combustion boiler cold start up procedure.
Types, combustion in boilers, performances evaluation, analysis of losses, feed water treatment, blow down, energy conservation opportunities. Afbc and cfbc boilers circulating fluidised bed combustion operation manuals presentations. Atmospheric and pressurized fluidised bed boilers design their problems. Someone consult for afbc boiler, while some search for cfbc boiler. Drivers for consideration for cfbc selection cfb available with usc designs up to 800 mwe with. Circulating fluidizedbed combustion technology cfbc. Take advantage of the most economical way to improve efficiency. Circulating fluidized bed combustion cfbc pdf free. Circulating fluidized bed cfb boilers waste heat boilers heat recovery steam generators bubbling fluidized bed bfb boilers pc boilers fw power group global references. Cfbc internal recirculation circulating fluidised bed combustion ir cfbc. Circulating fluidized bed technology 4th eu south africa clean coal working group meeting.