Flue gas outlet device of air preheater and flue gas discharging method
An air preheater and flue gas outlet technology, which is applied in the boiler field of the petrochemical industry, can solve the problems of the reduction of the heat exchange effect of the air preheater, the reduction of the flow area of the flue, and the increase of the power consumption of the induced draft fan, so as to reduce the flue The effect of fouling and scaling, improving recovery rate and reducing labor cost
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Embodiment 1
[0057] refer to Figure 1-5 , the flue gas outlet device of the air preheater, including a flue, the flue includes a connecting portion 12 arranged in the direction of the flue gas flow, as a simplified structure, the flue gas inlet of the connecting portion 12 can be used as the flue gas input end .
[0058] The connecting portion 12 has a right-angled trapezoidal structure, including a first bottom 123 on the top, a second bottom 124 on the bottom, and a right-angle waist 125 and an oblique waist between the first bottom 123 and the second bottom 124. position, the oblique waist part forms a first slope surface 121, and the right-angle waist part 125 and the second bottom 124 form a second slope surface 122;
[0059] The first bottom 123 of the connecting part 12 is connected to the main body of the air preheater 100, the second bottom 124 of the connecting part 12 is connected to the dust collection device to form a flue gas and dust collecting end, and the right-angled wa...
Embodiment 2
[0072] To provide another flue gas outlet device with better effect, see Figure 1-5 , the flue gas outlet device is provided with a vertical transition flue 11 and a connecting portion 12 in sequence along the flue gas outflow direction, which is a more optimized structure than that of Embodiment 1, and the vertical transition flue 11 is used as the flue gas input end.
[0073] A vertical transitional flue 11 is further provided to play a transitional role, which cooperates with the structural characteristics of the connecting part 12, which is beneficial to the flow of smoke and the deposition of dust.
[0074] The connecting portion 12 has a right-angled trapezoidal structure, including a first bottom 123 on the top, a second bottom 124 on the bottom, and a right-angle waist 125 and an oblique waist located between the two bottoms. The oblique waist A first slope 121 is formed, and a second slope 122 is formed between the right-angle waist portion 125 and the second bottom ...
Embodiment 3
[0092] The dust collection device in Example 1-2 has been optimized and improved to realize automatic collection, sealing and unloading of dust, without the problem of dust escaping and causing pollution, and is more environmentally friendly and intelligent.
[0093] The dust collection device includes a settling ash hopper 15 and a closed ash unloading device 16; the inlet of the settling ash hopper 15 is connected to the second bottom 124 of the connecting portion 12, and the outlet is connected to the inlet of the closed ash unloading device 16 , the closed ash unloading device 16 includes a sealed cavity with an inlet and an outlet, and a valve for controlling the opening and closing of the inlet and outlet.
[0094] The inlet of the settling ash hopper 15 is welded at the outlet of the connecting part 1212 and kept open.
[0095] The closed ash unloading device 16 is connected to the settling ash hopper 15 through a flange, and the internal components such as the pneumati...
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