Bucket Elevator

  • Coal-Fired Hot Blast Furnace

  • Common coal-fired hot blast stove includes manual feeding burning stove chain grate stove the fluidized bed combustion boiler etc. the furnace will be chosen according to different operating condition.

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Equipment Introduction
Common coal-fired hot blast stove includes manual feeding burning stove chain grate stove the fluidized bed combustion boiler etc. the furnace will be chosen according to different operating condition.
Manual feeding burning stove is one of the most simple in layer combustion furnaces which named from that the completion of adding coal poke the fire slag removal by manual work. The fuel can be coal wood biomass and other materials which is welcomed by the dryer users. Wide adaptability in all kinds of coal the operation is easy to be handled but with heavy labor intensity. Due to the coal is added periodically which leads the imbalance of supply and demand and the cyclical change of combustion process and also the economic efficiency of furnace is reduced sometimes with black smoke. To save energy eliminate smoke and control dust the method of “add coal frequently add coal in small quantity add coal quickly and add coal evenly” can adopted in the operation.
Chain grate furnace mechanical coaling is realized by using light chain grate furnace which equipped with blower induced draft fan to do mechanical ventilation and the automatic operation is realized with scraper slag extractor. The new type and energy saving furnace arch is adopted in front and tail furnace arch the coal falls onto the furnace grate from the coal bucket and get burned after getting into the furnace chamber the flame is folded to the front smoke box after reflecting by the tail arch and upward through the two sides’ combustion chamber and then reentered the furnace pipelines and get into the coal saving device through the tail smoke box and finally exhausted into atmosphere through the flue to the chimney driven by the induced draft fan.
The fluidized bed combustion boiler is one kind of new coal combustion technology developed in recent years the coal dust broken to a certain particle size and blew by the wind to form the boiling combustion in the furnace chamber at a certain height. When air flow through the static granular material layer by bottom - up approach if the velocity exceeds a certain limit the powder layer begins to bulge squirm with mobility and turns to be false fluid state the process known as fluidization of bulk material layer. The material after fluidization stirs up and down similar as the boiling of the fluid and so it’s also called boiling layer. The thermal devices of using this method to handle material is called fluidized bed combustion boiler.
The prominent advantage of fluidized bed combustion boiler is the wide adaptability to coals which can burn bituminous coal anthracite lignite coal and coal gangue. Another advantage of it is to make fuel combustion fully so as to it can obtain higher fuel efficiency.

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