Vertical Fluidized Bed Furnace 90% Thermal Efficiency 450℃ Steam Temp

CFB Circulating Fluidized Bed Boiler coal fired boiler efficiency calculation

Fluidized Bed

1. At the bottom of the boiler furnace there is a bed of inert material. Bed is where the coal or fuel spreads. Air supply is from under the bed at high pressure. This lifts the bed material and the coal particles and keeps it in suspension. The coal combustion takes place in this suspended condition. This is the Fluidized bed.

2. Special design of the air nozzles at the bottom of the bed allows air flow without clogging. Primary air fans provide the preheated Fluidizing air. Secondary air fans provide pre-heated Combustion air. Nozzles in the furnace walls at various levels distribute the Combustion air in the furnace.

Circulation

1. Fine particles of partly burned coal, ash and bed material are carried along with the flue gases to the upper areas of the furnace and then into a cyclone. In the cyclone the heavier particles separate from the gas and falls to the hopper of the cyclone. 2. This returns to the furnace for recirculation. Hence the name Circulating Fluidized Bed combustion. The hot gases from the cyclone pass to the heat transfer surfaces and go out of the boiler.

Bed Material

1. To start with the bed material is sand. Some portion is lost in the ash during the operation and this has to be made-up. In coal fired boilers the ash from the coal itself will be the makeup material.

2. When firing bio fuels with very low ash content sand will be the makeup bed material. For high Sulphur coals Limestone addition to the bed material reduces SO2 emissions.

CFB High fuel flexibility

1. The main advantage of our boiler is its superb fuel flexibility. Most of the over 90 references around the world are multifuel boilers that combust biomasses and fossil fuels in continuously varying proportions.
2. Cocombustion is an environmentally benign method of combining excellent reliability and availability with great potential to optimize operational costs by allowing several fuel alternatives.

Main Specifications of Circulation Fluidized Bed Boiler

    Dehai Boiler is a manufacturer of A-class boiler(Power station boiler,industrial boiler,HRSG,waste-to-energy boiler,biomass boiler) and correlated A-class pressure parts intergrating the design,fabrication,installation,repair and mainteance.

Dehai has ISO9001:2008 certificate issued by France AFAQ-EAQA Ltd,A-class boiler manufacturing license,ASME S Stamp and U Stamp authorized certificate.

    Through effective management system and high quality products,Dehai became the qualified supplier of many famous boiler factories and energy companies and has won a lot of stable customers both domestic and abroad ,such as :Amec Foster Wheeler,Alstom,Dongfang Boiler,Harbin Boiler,Hangzhou Boiler,etc.

    Based on the business idea of "High quality for survival and perfect service for development",we shall care for customers' demand and keep improving our work permanently. To create Dehai brand,is to serve clients with our improved products and better performance.

    Dehai is located in Economic and Technological Development Zone,Zhangjiagang City,Jiangsu Province. S38 highway Zhangjiagang exit is about 1.5 kilometers to the north of our company and the traffic is very convenient.