CFBC is a Canadian radio station broadcasting at 930 AM in Saint John, New Brunswick. The station plays a country music format and is owned & operated by the Maritime Broadcasting System.CFBC’s first broadcast was on November 21, 1946, and was an affiliate of the CBC Dominion Network until its dissolution in 1962. The callsign comes from the station’s original owner, the Fundy Broadcasting Company (later known as Fundy Cable). CFBC-FM began operating in 1965 at 98.9 MHz; it is now known as CJYC-FM. MBS purchased CFBC and CJYC from Fundy in 1997.For several years, CFBC and, sister station, CJYC-FM’s studios were on Carleton Street in Uptown Saint John. In the mid-1990s, CFBC and CJYC-FM moved their studios and offices to 199 Chesley Drive. In 1997, CFBC and CJYC-FM moved into MBS’s facility on Union Street, where they are as of August 2011.In addition to the oldies format, CFBC is known for its news coverage, including the morning talk show Talk of the Town which went off the air in 2006.Unionized staff at CFBC and two other MBS stations in Saint John went on strike in June 2012 triggering calls for a boycott of the station’s advertisers and leading strikers to set up an internet radio station.In August 2013, CFBC flipped from oldies/classic hits to country.
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.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.
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. 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.
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. 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.