The boiler parameters are 70 tph, 88 kgcm2, 510 deg c and feed water temperature is 124 deg c. Circulating fluidizedbed combustion technology cfbc technology overview. Types, combustion in boilers, performances evaluation, analysis of losses, feed water treatment, blow down, energy conservation opportunities. The boiler with its simplified, costeffective and efficient design provides improved performance. Circulating fluidized bed cfb combustion boilers gives the flexibility for combustion of a wide range of coals and alternative fuel sources. It has become the technology of choice for clean firing of solid fuels. This article gives a brief description of the working of a cfb boiler. Cfbc design free download as powerpoint presentation. The division is an accredited epc contractor for industrial plant projects and efficiently provides trustworthy products and service. This state of act systems are manufactured over a range of 500 tph. Design of cfbc boiler boiler electricity generation.
Atmospheric and pressurized fluidised bed boilers design their problems. Organization of combustion process in cfbc boilers is different compared to the combustion in bfbc boilers. Circulating fluidised bed combustion boiler cfbc capacities. This cfbc technology utilizes the fluidised bed principle in which crushed 6 12 mm size fuel and limestone are. Circulating fluidized bed boiler design and operation and maintenance by prabir basu.
In addition to fuel flexibility, cfbc technology has environmental advan tages over other boiler designs such as pulverized coal or other combustion systems. Air cfb technology princi ples and benefits combustion of fuel in a high bed inventory consisting of a mixture of fuel, ashes and sorbent limestone. This section is all about afbc and cfbc boilers circulating fluidised bed combustion operation manuals. We have over 70 years experience of industrial steam boiler and autoclave,and we have a professional installation and aftersales staff for products. A weak point in the cfb boiler design is the particle separator, which is large and has traditionally been lined with thick refractory that is exposed to heavy erosion from the fuel particles. Design of cfbc boiler boiler electricity generation scribd. Energy performance assessment of boilers bureau of energy efficiency 1 1. Sub and supercritical boiler design with and without reheater. Operating experience of low grade fuels in circulating. Pdf design theory of circulating fluidized bed boilers. There are a lot of questions that are common for bfbc and cfbc boiler design, so the common questions will be listed first. This characteristic allows the oxycfb boiler to be made smaller and less expensive in a new unit application. In a pfbc boiler design, the combustion chamber operates at 5 to 20 atmospheres, with the cleaned exhaust gases driving a gas turbine. Recent advances in design have made it possible to reduce the amount of refractory by using steamcooled cyclones and thinner refractory.
Circulating fluidized bed boiler steinmuller engineering. Performance analysis of 250 mw lignite fired circulating fluidized bed 79 fig. Design considerations for cfb boilers springerlink. The disadvantage of an ehe is that it complicates the design and operation of the. Cfbc boiler manufacturer, combustion engineering boilers faq about combustion engineering boilers 1. This book is designed to provide practicing engineers, students, and researchers with insights into the operation and principle of the working of circulating fluidized bed cfb boilers. Developments in circulating fluidised bed combustion. Cfbc requires huge mechanical cyclones to capture and recycle the large amount of bed material, which requires a tall boiler. Fuel costs and maintenance costs represent the largest portion of your boiler equipment investment.
At the bottom of the boiler furnace there is a bed of inert material. A modern concept in steam generators, these boilers are designed and manufactured for a wide range up to about 550 tph capacity. The foster wheeler lagisza cfb boiler from conceptual design to existing plant 43% net efficiency. However in cfbc technology, the design of boilers involve the usage of high quality and quantities of refractory 2.
Msw consumer pdf mixed plastics consumer pdf wood and plastics polyolefin. Since the 1970s, circulating fluidized bed cfb technology has been applied to combustion and steam generation. Cfbc boilers are mostly claimed to be more cost effective than afbc boilers for industrial uses requiring more than 80110 thr of steam. The time of use of circulating fluidized bed combustion boilers cfbc boilers is more than 3 decades. Circulating fluidized bed combustion cfbc pdf free. Circulating fluidized bed boiler cfb boiler ge power. This cfbc technology utilizes the fluidised bed principle in which crushed 6 12 mm size fuel and limestone are injected into the furnace or combustor. Basic design engineering for a process steam cfbc boiler, 35 th, bitumi nous coal, newbuilt. About the boiler the cfbc boiler supplied by chinese company has been in operation for about 3 months prior to my visit to this plant. Why choose zg as undergraduate project on design and fabrication of a boiler water distiller manufacturer. Cfbc boiler design and calculation of main parameters and dimensions. Remember, the initial cost of a boiler is the lowest portion of your boiler investment.
In the days of modernization, industrialization, technological world we find out a new method of steam production with help of coal. Circulating fluidised bed combustion boiler cfbc enmas. Iea clean coal centre operating experience of low grade fuels in circulating fluidised bed combustion cfbc boilers 3 preface this report has been produced by iea clean coal centre and is based on a survey and analysis of published. Key benefits are fuel flexibility, reduced emission and lower bed temperature. Study, evolution, design and analysis of cfbc boiler for. Solids separator hot cyclone plate type plate type uncooled hot cyclones with loop seal assembly are adopted in enmas gb cfbc boilers. 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. A cfbc could be a good choice if the following conditions are met.
Circulating fluidizedbed combustion technology cfbc. Prior exposure to the process of gassolid fluidization is not essential for full comprehension of this. Performance analysis of 250 mw lignite fired circulating. Cfbc boilers are generally more economical than afbc boilers for industrial application requiring more than 75 100 thr of steam. It is comparatively less than unlike the bubbling afbc boilers the erosion. Boilers bureau of energy efficiency 27 syllabus boilers. Take advantage of the most economical way to improve efficiency and.
The practical example of a first generation cfb boiler design is two 300 mwe cfb boilers at jacksonville energy authority in jacksonville. Heat credits include sulphation credit and forced draft fan credit. With a target of reducing refractory material in the boiler and increasing. Afbc boiler operation pdf afbc boilers firing coal are not competitive with oil or gas versa.
Cfbc needs huge mechanical cyclones to aquire and recycle the high amount of bed material, which need tall boiler. Fbc fluidized bed combustion is a combustion technology used to burn solid fuels in steam boilers. Circulating fluidized bed cfb boilers waste heat boilers heat recovery steam generators bubbling fluidized bed bfb boilers pc boilers. Handle high sulphur, high ash and high moisture fuels, petcoke, sludge, washery rejects, lignite, biomass. We provide free training courses and study material related to boilers and mechanical power plants oil and gas petroleum books. The feedstock, as well as the bed material, has a wide size distribution in cfb boilers. Project management team experienced in cfbc boiler and pc boilers installations. Over the past two decades, cfb technologyincluding cfb boiler operation and cfb boiler design has demonstrated its ability to efficiently utilize a wide variety of fuels while still meeting stringent stack emission limits. Studies on circulating fluidized bed cfb boilers have being conducted at the tsinghua university th for about two decades and much of works are done to link the fundamentals with practical. Benefits include high combustion efficiency, high reliability and availability, low maintenance cost, reduced erosion, enormous fuel flexibility and low emission. Fluidized bed boiler an overview sciencedirect topics.
Cfbc boilers are generally claimed to be more economical than afbc boilers for industrial application requiring more than 75 100 thr of steam. All this without compromising efficiency and with reduced emissions. Detailed refractory failure analysis selection of refractory materials to suit their existing operating conditions improved boiler design in line with calderys global best practices enhanced anchor design in line with cass increased lifetime and performance of cfbc boilers. Cfbc boiler manufacturer, undergraduate project on design and fabrication of a boiler water distiller faq about undergraduate project on design and fabrication of a boiler water distiller 1. Pdf studies on circulating fluidized bed cfb boilers have being conducted at the tsinghua university th for about two decades and much. Fbc boilers bureau of energy efficiency 143 syllabus fbc boilers. Fuel flexible design cfbc boiler in india fuel flexible design cfbc boiler in india. The fluidized bed boilers have a wide capacity range 0. Why choose zg as combustion engineering boilers manufacturer. For pcc and cfbc boilers, oxyfuel combustion systems that produce high.