A fluidized bed boiler using coal gangue combustion
A technology of fluidized bed boiler and coal gangue, which is applied in fluidized bed combustion equipment, burning fuel in molten state, steam boiler, etc., can solve the problems of high ash content, low calorific value, low utilization rate of coal gangue, etc., and achieve thermal quality The effect of good exchange and full combustion
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Embodiment 1
[0023] Example 1: A XF-SI type circulating fluidized bed boiler purely burning coal gangue
[0024] Retrofit circulating fluidized bed boilers such as figure 2 As shown, it includes a furnace 1, a tail shaft 2, a circulation channel 3, a steaming heating surface 4, a water wall 5 and an air distribution plate.
[0025] At first cyclone air cap 7 is installed in furnace 1, as image 3 As shown, the cyclone hood 7 we adopt has holes on the side wall of the hood 7 to form an airflow channel, as Figure 4 As shown, the orthographic projection of the airflow channel on the opening of the outer wall of the cyclone hood 7 does not coincide with the orthographic projection of the opening on the inner wall of the cyclone hood 7, and the deviation direction and angle are consistent.
[0026] Secondly, remove the water wall in the furnace 1, such as figure 1 shown.
[0027] After the coal gangue is fed into the furnace 1, it is ignited with charcoal, and the swirling flow is generat...
Embodiment 2
[0030] Adopt the circulating fluidized bed boiler in the above-mentioned embodiment 1, put into coal gangue with a calorific value of about 1000 kcal / kg, keep part of the water-cooled wall in the furnace, and arrange the area of the water-cooled wall per ton of steam to be 0.5 square meters, which is appropriate Increase the convective heat exchange surface, use wood to ignite to make it burn, and measure the temperature of the furnace to be 900-950 degrees. If steam with a saturation temperature of 194 degrees and 1.27 trillion is required, 1 ton of coal gangue can produce 1,000 kilograms of qualified steam steam.
Embodiment 3
[0032] Adopt the circulating fluidized bed boiler in the above-mentioned embodiment 1, put into coal gangue with a calorific value of about 900 kilocalories / kg, keep part of the water-cooled wall in the furnace, and arrange the area of the water-cooled wall per ton of steam to be 0.3 square meters, and Increase the convective heat exchange surface, use wood ignition to make it burn, and measure the temperature of the furnace as 900-950 degrees. If steam with a saturation temperature of 194 degrees and 1.27 MPa is required, 1 ton of coal gangue can produce 850 kg of steam that meets the conditions. of steam.
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