Filtering device for flue gas waste heat recovery

Abstract

The utility model discloses a filtering device for flue gas waste heat recovery, which comprises a ventilation pipe, two ends of the ventilation pipe are respectively provided with an air inlet and an air outlet, a plurality of filter screens are detachably connected in the ventilation pipe along the length direction of the ventilation pipe, and a first rotating shaft is rotatably mounted on one side of each filter screen in the ventilation pipe. Knocking mechanisms are fixedly connected to the first rotating shafts, a gear motor is fixedly installed on the outer wall of the ventilation pipe through a support, the first rotating shafts are in transmission connection with an output shaft of the gear motor, and the bottom of the ventilation pipe is located on the side, facing the air inlet, of each filter screen and fixedly communicates with an ash hopper. According to the filtering device, after the filtering device is used for a period of time, the gear motor is started to drive the first rotating shafts to rotate, and the knocking mechanism can be driven to rotate, so that the filter screen is knocked by the knocking mechanism to shake off dust adhered to the filter screen, and the dust on the surface of the filter screen can be cleaned without taking out the filter screen; the manual maintenance period of the filter screen is greatly prolonged, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to a filtering device, in particular to a filtering device for recovering waste heat from flue gas. Background Art

[0002] The temperature of boiler flue gas is relatively high, and heat exchange equipment is usually used to recover the waste heat of the flue gas. Since the flue gas usually contains a lot of dust and impurities, the flue gas needs to be filtered before heat exchange to prevent the impurities in the flue gas from clogging the heat exchange equipment. After some existing flue gas filtering devices have been used for a period of time, the dust and impurities in the flue gas will adhere to the filter screen, affecting the flow of flue gas at the filter screen. Therefore, the filter screen needs to be removed for cleaning, which is time-consuming and needs to be improved. Utility Model Content

[0003] The purpose of the present invention is to provide a filter device for recovering waste heat from flue gas, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A filtering device for recovering waste heat from flue gas, comprising a ventilation pipe with an air inlet and an air outlet respectively provided at both ends, a plurality of filter screens being detachably connected to the ventilation pipe along its length direction, a first rotating shaft being rotatably installed on one side of each filter screen in the ventilation pipe, a knocking mechanism being fixedly connected to the first rotating shaft, a reduction motor being fixedly installed on the outer wall of the ventilation pipe through a bracket, the first rotating shaft being transmission-connected to the output shaft of the reduction motor, an ash hopper being fixedly connected to the bottom of the ventilation pipe on the side of each filter screen facing the air inlet, and a blocking cover being detachably connected to the bottom end of the ash hopper.

[0006] As a further solution of the present invention: one end of the first rotating shaft is fixedly connected to the first bevel gear after passing through the ventilation pipe, the outer wall of the ventilation pipe is rotatably connected to the second rotating shaft through a bearing seat, the outer wall of the second rotating shaft and the corresponding parts of each first bevel gear are fixedly sleeved with a second bevel gear, the second bevel gear and the corresponding first bevel gear are engaged with each other, and one end of the second rotating shaft is fixedly connected to the output shaft of the reduction motor through a coupling.

[0007] As a further solution of the present invention: the knocking mechanism includes a connecting seat fixedly sleeved on the first rotating shaft, the outer wall of the connecting seat is slidably penetrated by a plurality of guide rods, one end of the guide rod is fixedly connected to the limiting block, the other ends of the plurality of guide rods are commonly fixedly connected to a connecting plate, the outer wall of the guide rod located between the connecting seat and the guide rod is sleeved with a spring, the outer wall of the connecting plate is rotatably connected to a roller through a wheel frame, and the filter is located within the movable range of the corresponding roller.

[0008] As a further solution of the present invention: the outer wall of the ventilation pipe and the corresponding parts of each filter screen are slidably penetrated with an installation frame through a socket, and the filter screen is fixedly installed in the corresponding installation frame. One end of the installation frame passes through the ventilation pipe and is fixedly connected to a mounting plate, and the mounting plate is fixedly connected to the ventilation pipe by bolts.

[0009] As a further solution of the present invention: the inner wall of the ventilation pipe is fixedly connected to a baffle frame on both sides of each socket, and the installation frame is located between the two corresponding baffle frames.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] In the utility model, after the filter device has been used for a period of time, the reduction motor is started to drive each first rotating shaft to rotate, which can drive the knocking mechanism to rotate, so that the knocking mechanism is used to knock on the filter to shake off the dust adhering to the filter. The dust on the surface of the filter can be cleaned without taking out the filter, which greatly extends the manual maintenance cycle of the filter and has a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure is a structural diagram of a filter device for recovering waste heat from flue gas.

[0013] Figure 2 for Figure 1 sectional view of .

[0014] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0015] Figure 4 The diagram is a structural diagram of a knocking mechanism in a filter device for recovering waste heat from flue gas.

[0016] Among them, the ventilation pipe 1, the air inlet 2, the air outlet 3, the baffle frame 4, the socket 5, the installation frame 6, the installation plate 7, the filter 8, the ash hopper 9, the blocking cover 10, the first rotating shaft 11, the first bevel gear 12, the second rotating shaft 13, the second bevel gear 14, the bracket 15, the reduction motor 16, the connecting seat 17, the connecting plate 18, the guide rod 19, the limit block 20, the spring 21, the wheel frame 22, and the roller 23. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0019] It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation as described in the specification. Therefore, it should not be understood as a limitation on the present invention.

[0020] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0021] See also Figures 1 to 4 In an embodiment of the present invention, a filtering device for recovering waste heat from flue gas comprises a ventilation pipe 1 with an air inlet 2 and an air outlet 3 respectively provided at both ends. A plurality of filter screens 8 are detachably connected to the ventilation pipe 1 along its length direction. A first rotating shaft 11 is rotatably installed on one side of each filter screen 8 in the ventilation pipe 1, and a knocking mechanism is fixedly connected to the first rotating shaft 11. A reduction motor 16 is fixedly installed on the outer wall of the ventilation pipe 1 through a bracket 15, and the first rotating shaft 11 is transmission-connected to the output shaft of the reduction motor 16. The bottom of the ventilation pipe 1 is located on the side of each filter screen 8 facing the air inlet 2 and is fixedly connected to an ash hopper 9. The bottom end of the ash hopper 9 is detachably connected to a blocking cover 10, which can be flange-connected, threaded-connected, etc. The blocking cover 10 can also be mechanically connected to the ash hopper 9 and opened electrically.

[0022] The utility model adopts the above-mentioned scheme. When in use, after the flue gas enters the ventilation pipe 1 from the air inlet 2, it will pass through each filter screen 8 and then be discharged from the air outlet 3, so as to utilize multiple filter screens 8 to perform multi-layer filtration on the flue gas. Some dust and impurities filtered out will fall into the ash hopper 9. It only needs to open the blocking cover 10 regularly to discharge the dust collected in the ash hopper 9. After the filtering device has been used for a period of time, the reduction motor 16 is started to drive each first rotating shaft 11 to rotate, which can drive the knocking mechanism to rotate, so as to utilize the knocking mechanism to knock on the filter screen 8 to shake off the dust adhered to the filter screen 8. There is no need to take out the filter screen, and the dust on the surface of the filter screen 8 can be cleaned, which greatly extends the manual maintenance cycle of the filter screen 8 and has a good use effect.

[0023] Specific combination Figure 1 and Figure 2 In one embodiment of the present utility model, one end of the first rotating shaft 11 is fixedly connected to the first bevel gear 12 after passing through the ventilation pipe 1. The first rotating shaft 11 is mechanically sealed with the ventilation pipe 1. The outer wall of the ventilation pipe 1 is rotatably connected to the second rotating shaft 13 through a bearing seat. The outer wall of the second rotating shaft 13 and the corresponding parts of each first bevel gear 12 are fixedly sleeved with a second bevel gear 14. The second bevel gear 14 is meshed with the corresponding first bevel gear 12. One end of the second rotating shaft 13 is fixedly connected to the output shaft of the reduction motor 16 through a coupling.

[0024] Starting the reduction motor 16 can drive the second rotating shaft 13 to rotate, and then use the cooperation of the first bevel gear 12 and the second bevel gear 14 to drive each first rotating shaft 11 to rotate, so as to drive the knocking mechanism to knock the filter 8. It has a simple structure and stable operation.

[0025] Specific combination Figure 4 In one embodiment of the present utility model, the knocking mechanism includes a connecting seat 17 fixedly sleeved on the first rotating shaft 11, and the outer wall of the connecting seat 17 is slidably penetrated by a plurality of guide rods 19, one end of the guide rod 19 is fixedly connected to the limiting block 20, and the other ends of the plurality of guide rods 19 are commonly fixedly connected to a connecting plate 18, and the outer wall of the guide rod 19 located between the connecting seat 17 and the guide rod 19 is sleeved with a spring 21, and the outer wall of the connecting plate 18 is rotatably connected to a roller 23 through a wheel frame 22, and the filter 8 is located within the movable range of the corresponding roller 23.

[0026] When the first rotating shaft 11 rotates, it can drive the connecting seat 17 to rotate, so that the roller 23 contacts the corresponding filter 8 to knock the filter 8. After the roller 23 contacts the filter 8, it will drive the guide rod 19 to move toward the connecting seat 17 through the connecting plate 18 and compress the spring 21 so that the roller 23 can pass through the filter 8 smoothly.

[0027] Specific combination Figure 1-3 In one embodiment of the present invention, the outer wall of the ventilation pipe 1 and the corresponding parts of each filter screen 8 are slidably penetrated with a mounting frame 6 through a socket 5, and the filter screen 8 is fixedly installed in the corresponding mounting frame 6. One end of the mounting frame 6 passes through the ventilation pipe 1 and is fixedly connected to a mounting plate 7. The mounting plate 7 is fixedly connected to the ventilation pipe 1 by bolts. The inner wall of the ventilation pipe 1 is fixedly connected with a baffle frame 4 on both sides of each socket 5, and the mounting frame 6 is located between two corresponding baffle frames 4.

[0028] After removing the bolts for fixing the mounting plate 7 , the mounting hole 6 and the filter screen 8 can be pulled out from the ventilation pipe 1 , which is simple and convenient to operate.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A filter device for recovering waste heat from flue gas, characterized by: The invention comprises a ventilation pipe (1) with an air inlet (2) and an air outlet (3) respectively provided at both ends. A plurality of filter screens (8) are detachably connected in the ventilation pipe (1) along the length direction thereof. A first rotating shaft (11) is rotatably installed on one side of each filter screen (8) in the ventilation pipe (1). A knocking mechanism is fixedly connected to the first rotating shaft (11). A reduction motor (16) is fixedly installed on the outer wall of the ventilation pipe (1) through a bracket (15). The first rotating shaft (11) is transmission-connected to the output shaft of the reduction motor (16). An ash hopper (9) is fixedly connected to the bottom of the ventilation pipe (1) on the side of each filter screen (8) facing the air inlet (2). A blocking cover (10) is detachably connected to the bottom end of the ash hopper (9).

2. The filter device for recovering waste heat from flue gas according to claim 1, characterized in that: One end of the first rotating shaft (11) passes through the ventilation pipe (1) and is fixedly connected to the first bevel gear (12). The outer wall of the ventilation pipe (1) is rotatably connected to the second rotating shaft (13) through a bearing seat. The outer wall of the second rotating shaft (13) and the corresponding position of each first bevel gear (12) are fixedly sleeved with a second bevel gear (14). The second bevel gear (14) and the corresponding first bevel gear (12) are meshed with each other. One end of the second rotating shaft (13) is fixedly connected to the output shaft of the reduction motor (16) through a coupling.

3. The filter device for recovering waste heat from flue gas according to claim 1, characterized in that: The knocking mechanism comprises a connecting seat (17) fixedly sleeved on the first rotating shaft (11); a plurality of guide rods (19) are slidably penetrated through the outer wall of the connecting seat (17); one end of the guide rod (19) is fixedly connected to a limit block (20); the other ends of the plurality of guide rods (19) are commonly fixedly connected to a connecting plate (18); the outer wall of the guide rod (19) located between the connecting seat (17) and the guide rod (19) is sleeved with a spring (21); the outer wall of the connecting plate (18) is rotatably connected to a roller (23) through a wheel frame (22); and the filter screen (8) is located within the movable range of the corresponding roller (23).

4. The filter device for recovering waste heat from flue gas according to claim 1, characterized in that: The outer wall of the ventilation pipe (1) and the corresponding position of each filter screen (8) are slidably penetrated by a mounting frame (6) through a socket (5); the filter screen (8) is fixedly installed in the corresponding mounting frame (6); one end of the mounting frame (6) passes through the ventilation pipe (1) and is fixedly connected to a mounting plate (7); the mounting plate (7) is fixedly connected to the ventilation pipe (1) by bolts.

5. The filter device for recovering waste heat from flue gas according to claim 4, characterized in that: The inner wall of the ventilation pipe (1) is located on both sides of each socket (5) and is fixedly connected to a baffle frame (4), and the installation frame (6) is located between the two corresponding baffle frames (4).

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