Solid particle material composite grading and drying device and method
A technology of grading drying and solid particles, which is applied in the directions of drying solid materials, drying gas layout, drying, etc., can solve the problems of high equipment investment, explosion, loss of calorific value of gasification products, etc., and achieve the effect of meeting the needs of subsequent processes.
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Embodiment 1
[0054] like figure 1 and figure 2 As shown, air at normal temperature is used as the carrier gas to dry and classify coal for gasification with a water content of 13-15% (mainly external water) and a particle size range of 0-8 mm.
[0055] The dryer is composed of a fluidized bed section and a moving bed section 13. The moving bed section 13 is located below the fluidized bed section. The segment is further divided into an upper dilute phase segment 11 and a lower dense phase segment 12 .
[0056] The cross-sectional area of the dense-phase section 12 is 1 / 3 of the cross-sectional area of the dilute-phase section 11 . A tubular heat exchange surface 16 is provided in the dense phase section 12 , and the superficial fluidization velocity of the carrier gas passing through the heat exchange surface 16 is 1 m / s. The dilute phase section and the moving bed section are respectively provided with tubular heat exchange surfaces 15 and 17 . Saturated steam with a pressure of ...
Embodiment 2
[0060] like figure 1 and image 3 As shown, using the flue gas at a temperature of 150°C as the carrier gas, the lignite with a water content of 30-40% (mainly internal water) and a particle size range of 0-10 mm is dried and classified.
[0061] The dryer is composed of a fluidized bed section and a moving bed section 13. The moving bed section 13 is located below the fluidized bed section. The two are separated by an air distribution pipe 18 with a hood, and are directly connected up and down through the gap between the pipes; the fluidized bed section The segment is further divided into an upper dilute phase segment 11 and a lower dense phase segment 12 .
[0062] The cross-sectional area of the dense-phase section 12 is 1 / 2 of the cross-sectional area of the dilute-phase section 11 . A tubular heat exchange surface 16 is provided in the dense phase section 12 , and the superficial fluidization velocity of the carrier gas passing through the heat exchange surface 16 i...
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