Axial flow induced draft fan movable blade drying device

Abstract

The utility model provides a kind of axial flow induced draft fan moving vane drying device, comprising: axial flow induced draft fan, air guide component and dryer, the air guide component is installed in the downside of axial flow induced draft fan, the air guide component right end is fixedly connected with dryer left end, compared with prior art, the utility model has the beneficial effects as follows: by setting air guide component, so that drying airflow can move to the position required to heat and dry as required, improve equipment use convenience and drying effect, the setting of dryer, by adding dryer in the downside of axial flow induced draft fan, cooperate air guide component, under the action of air guide component, it can be dried according to the need in the inside of axial flow induced draft fan, solve the problem that high viscosity, acidity, ash smoke adhere to the root of axial flow induced draft fan moving vane, cause blade seal damage, jamming transmission device (sliding block, mandrel, crank shaft) and other important components damage even lead to induced draft fan vibration big influence unit safe operation problem.

Description

Technical Field

[0001] This utility model belongs to the technical field of drying equipment, and specifically relates to an axial flow induced draft fan moving blade drying device. Background Technology

[0002] Currently, under spot market conditions, the unit load requires long-term deep adjustments or rapid responses, demanding quick and flexible operation. Adjustable-blade induced draft fans, subject to unit load changes, need to respond quickly to load change commands. The blade actuator rapidly adjusts the mechanical parts to change the blade opening, placing higher demands on the flexibility of the induced draft fan's blade switching. Because it is installed at the boiler electrostatic precipitator outlet, during fan operation, the flue gas from the furnace carries acidic substances such as ammonia and sulfur trioxide. After passing through the dust collector, it enters the desulfurization absorption tower via the induced draft fan and is finally discharged through the chimney. Acid mist reacts with water vapor in the flue gas to form acid vapor. The presence of acid vapor significantly increases the dew point of the flue gas. When flue gas containing acid vapor flows through the fan blades, and the blade temperature is lower than the acid vapor's dew point, the acid vapor, carrying ash, condenses at the blade roots, easily forming acid corrosion and deposits. Over time, this will affect the blade switching action, easily causing damage to the blade device, and causing asynchronous blade opening, resulting in increased fan vibration and ultimately affecting the safe operation of the unit.

[0003] After the unit is shut down, backflow of flue gas can occur when only one unit is running. Moist and corrosive flue gas from the desulfurization absorption tower system returns to the induced draft fan chamber, condensing into acidic liquid at the root of the moving blades, accompanied by ash caking, causing corrosion and adhesion at the blade roots. When the blades open and close, the spindle drives the regulating disc and slider. Due to jamming at the blade roots, the slider and crank deform and break during blade opening and closing, causing equipment damage. Therefore, we aim to design a novel axial flow induced draft fan blade drying device to solve this problem. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an axial flow induced draft fan blade drying device to solve the problems mentioned in the background technology.

[0005] This utility model is achieved through the following technical solution: an axial flow fan blade drying device, comprising: an axial flow fan, a guide assembly, and a dryer, wherein the guide assembly is installed on the lower side of the axial flow fan, and the right end of the guide assembly is fixedly connected to the left end of the dryer.

[0006] The air guiding assembly includes a wind box, an adjusting component, and a wind duct. The wind duct is movably installed on the upper end of the wind box, and an adjusting component for adjusting the direction of the wind duct is installed on the upper left side of the wind box.

[0007] The dryer includes a connecting pipe, a heating box, and an air inlet fan. The right end of the connecting pipe is fixedly connected to the left end of the heating box, and the air inlet fan is installed on the right end of the heating box.

[0008] In a preferred embodiment, the axial flow fan includes a drive motor, a transmission shaft, an air inlet box, and an air inlet pipe. The transmission shaft is rotatably mounted on the left end of the air inlet box, and the left end of the transmission shaft is connected to the drive motor via a coupling. The air inlet pipe is mounted on the right end of the air inlet box, and blades are mounted inside the air inlet pipe via the transmission shaft.

[0009] In a preferred embodiment, the upper end of the air inlet box is provided with an air outlet, the lower end of the air inlet box is provided with an air inlet, and the upper end of the air inlet box is connected to the external boiler electrostatic precipitator outlet. In actual use, the air box is connected to the lower end of the air inlet box through the air inlet, and the air duct extends into the lower end of the air inlet box through the air inlet.

[0010] In a preferred embodiment, the upper end of the bellows is fixed with an installation cylinder, and the installation cylinder has an installation cavity inside, through which the bellows is movably installed inside the installation cylinder.

[0011] In a preferred embodiment, the air duct has a hollow interior, and an exhaust port one is provided at the upper end of the air duct, and an exhaust port two is provided at the lower end of the air duct. The size and structure of the exhaust port one are the same as those of the exhaust port two, and the two are connected. The air guiding component can guide the hot air as needed, so that it can better heat the blades and flue gas.

[0012] In a preferred embodiment, the adjusting component includes a screw, a pull rod, and a transmission rod. The right end of the screw is rotatably connected to the left end of the pull rod, the right end of the pull rod is hinged to the lower end of the transmission rod, and the upper end of the transmission rod is hinged to the hinge seat on the left side of the lower end of the air duct.

[0013] After adopting the above technical solution, the beneficial effects of this utility model are as follows: By setting the air guide component, in actual use, if it is necessary to adjust the blowing angle of the hot air delivered to the air inlet box, the user can directly rotate the screw. Since the right end of the screw is rotatably connected to the left end of the pull rod, the right end of the pull rod is hinged to the lower end of the transmission rod, and the upper end of the transmission rod is hinged to the hinge seat on the lower left side of the air duct, as the pull rod moves, the transmission rod will drive the air duct to rotate left or right inside the installation cylinder, thereby achieving the adjustment of the blowing angle of the hot air delivered to the air inlet box, so that the drying airflow can move to the required heating and drying position as needed, improving the convenience of equipment use and drying effect;

[0014] The dryer is installed below the axial flow fan. In conjunction with the air guide assembly, the dryer can deliver outside air to the heating chamber for heating and then deliver it to the air guide assembly through the connecting pipe. Under the action of the air guide assembly, the inside of the axial flow fan can be dried as needed. This solves the problem that high viscosity, acidic, and ash-laden flue gas adheres to the root of the axial flow fan blades, causing damage to the blade seals, jamming, and damage to important components such as the transmission device (slider, spindle, crankshaft), and even causing large fan vibrations that affect the safe operation of the unit. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of an axial flow induced draft fan blade drying device according to the present invention.

[0017] Figure 2 This is a schematic diagram showing the connection between the air guide assembly and the dryer of an axial flow induced draft blade drying device according to this utility model.

[0018] Figure 3 This is a schematic diagram of the dryer structure of an axial flow induced draft fan blade drying device according to the present invention.

[0019] Figure 4 for Figure 2 An enlarged schematic diagram of point A in the middle.

[0020] In the diagram, 100-axial flow fan, 110-drive motor, 120-drive shaft, 130-inlet box, 131-outlet, 132-inlet, 140-inlet pipe, 150-blade;

[0021] 200-Air guide assembly, 210-Air box, 211-Mounting cylinder, 212-Mounting cavity, 220-Adjusting component, 221-Screw, 222-Transmission rod, 223-Pull rod, 230-Air duct, 231-Exhaust port one, 232-Exhaust port two;

[0022] 300-Dryer, 310-Connecting pipe, 320-Heating box, 330-Air inlet fan. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: an axial flow fan 100 moving blade drying device, including: an axial flow fan 100, an air guide assembly 200 and a dryer 300, the air guide assembly 200 is installed on the lower side of the axial flow fan 100, and the right end of the air guide assembly 200 is fixedly connected to the left end of the dryer 300.

[0025] The air guiding assembly 200 includes an air box 210, an adjusting component 220, and an air duct 230. The air duct 230 is movably mounted on the upper end of the air box 210, and the adjusting component 220 for adjusting the direction of the air duct 230 is mounted on the upper left side of the air box 210.

[0026] The dryer 300 includes a connecting pipe 310, a heating box 320, and an air inlet fan 330. The right end of the connecting pipe 310 is fixedly connected to the left end of the heating box 320, and the air inlet fan 330 is installed on the right end of the heating box 320.

[0027] Please see Figures 1 to 3 The axial flow induced draft fan 100 includes a drive motor 110, a transmission shaft 120, an air inlet box 130, and an air inlet pipe 140. The transmission shaft 120 is rotatably mounted on the left end of the air inlet box 130. The left end of the transmission shaft 120 is connected to the drive motor 110 via a coupling. The air inlet pipe 140 is mounted on the right end of the air inlet box 130. Blades 150 are mounted inside the air inlet pipe 140 via the transmission shaft 120.

[0028] An air outlet 131 is provided at the upper end of the air inlet box 130, and an air inlet 132 is provided at the lower end of the air inlet box 130. The upper end of the air inlet box 130 is connected to the external boiler electrostatic precipitator outlet. In actual use, the air box 210 is connected to the lower end of the air inlet box 130 through the air inlet 132, and the air duct 230 extends into the lower end of the air inlet box 130 through the air inlet 132.

[0029] An installation cylinder 211 is fixed to the upper end of the air box 210. An installation cavity 212 is provided inside the installation cylinder 211. The air duct 230 is movably installed inside the installation cylinder 211 through the installation cavity 212.

[0030] The interior of the air duct 230 is hollow, and an exhaust port 231 is provided at the upper end of the air duct 230, and an exhaust port 232 is provided at the lower end of the air duct 230. The size and structure of the exhaust port 231 are the same as those of the exhaust port 232, and the two are connected. The air guide component 200 can guide the hot air as needed, so that it can better heat the blades 150 and the flue gas.

[0031] As the first embodiment of this utility model, by adding a dryer 300 to the lower side of the axial flow induced draft fan 100, in conjunction with the air guide assembly 200, in actual use, the dryer 300 can transport outside air to the heating box 320 for heating, and then transport it to the air guide assembly 200 through the connecting pipe 310. Under the action of the air guide assembly 200, the interior of the axial flow induced draft fan 100 can be dried as needed, solving the problem that high viscosity, acidic, and ash-laden flue gas adheres to the root of the moving blade of the axial flow induced draft fan 100, causing damage to the blade 150 seal, jamming, damage to important components such as the transmission device (slider, spindle, crankshaft), and even causing large vibration of the induced draft fan, affecting the safe operation of the unit.

[0032] Please see Figure 2 as well as Figure 4 The adjusting component 220 includes a screw 221, a pull rod 223, and a transmission rod 222. The right end of the screw 221 is rotatably connected to the left end of the pull rod 223. The right end of the pull rod 223 is hinged to the lower end of the transmission rod 222. The upper end of the transmission rod 222 is hinged to the hinge seat on the lower left side of the air duct 230.

[0033] As a second embodiment of this utility model, based on the first embodiment described above, by setting the air guide assembly 200, in actual use, if it is necessary to adjust the blowing angle of hot air supplied to the air inlet box 130, the user can directly rotate the screw 221. Since the right end of the screw 221 is rotatably connected to the left end of the pull rod 223, the right end of the pull rod 223 is hinged to the lower end of the transmission rod 222, and the upper end of the transmission rod 222 is hinged to the hinge seat on the lower left side of the air duct 230, as the pull rod 223 moves, the transmission rod 222 will drive the air duct 230 to rotate left or right inside the mounting cylinder 211, thereby achieving the adjustment of the blowing angle of hot air supplied to the air inlet box 130, so that the drying airflow can move to the required heating and drying position as needed, improving the ease of use of the equipment and the drying effect.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An axial flow induced draft fan blade drying device, comprising: An axial flow fan (100), an air guide assembly (200), and a dryer (300) are characterized in that an air guide assembly (200) is installed on the lower side of the axial flow fan (100), and the right end of the air guide assembly (200) is fixedly connected to the left end of the dryer (300). The air guiding assembly (200) includes a wind box (210), an adjusting component (220), and a wind duct (230). The wind box (210) is movably mounted on the upper end of the wind box (210), and an adjusting component (220) for adjusting the direction of the wind duct (230) is installed on the left side of the upper end of the wind box (210). The dryer (300) includes a connecting pipe (310), a heating box (320) and an air inlet fan (330). The right end of the connecting pipe (310) is fixedly connected to the left end of the heating box (320), and the air inlet fan (330) is installed on the right end of the heating box (320).

2. The axial flow induced draft fan blade drying device as described in claim 1, characterized in that: The axial flow fan (100) includes a drive motor (110), a transmission shaft (120), an air inlet box (130), and an air inlet pipe (140). The transmission shaft (120) is rotatably mounted on the left end of the air inlet box (130). The left end of the transmission shaft (120) is connected to the drive motor (110) via a coupling. The air inlet pipe (140) is mounted on the right end of the air inlet box (130). Blades (150) are mounted inside the air inlet pipe (140) via the transmission shaft (120).

3. The axial flow induced draft fan blade drying device as described in claim 2, characterized in that: The upper end of the air inlet box (130) is provided with an air outlet (131), the lower end of the air inlet box (130) is provided with an air inlet (132), and the upper end of the air inlet box (130) is connected to the external boiler electrostatic precipitator outlet.

4. The axial flow induced draft fan blade drying device as described in claim 1, characterized in that: The upper end of the air box (210) is fixed with an installation cylinder (211), and the interior of the installation cylinder (211) is provided with an installation cavity (212). The air duct (230) is movably installed inside the installation cylinder (211) through the installation cavity (212).

5. The axial flow induced draft fan blade drying device as described in claim 4, characterized in that: The air duct (230) has a hollow interior and an exhaust port 1 (231) is provided at the upper end of the air duct (230). An exhaust port 2 (232) is provided at the lower end of the air duct (230). The size and structure of the exhaust port 1 (231) are the same as those of the exhaust port 2 (232), and the two are connected.

6. The axial flow induced draft fan blade drying device as described in claim 1, characterized in that: The adjusting component (220) includes a screw (221), a pull rod (223), and a transmission rod (222), wherein the right end of the screw (221) is rotatably connected to the left end of the pull rod (223); The right end of the pull rod (223) is hinged to the lower end of the transmission rod (222), and the upper end of the transmission rod (222) is hinged to the hinge seat on the left side of the lower end of the air duct (230).

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