Self-cleaning boiler flue gas waste heat recovery device

Abstract

The utility model provides a self-cleaning boiler flue gas waste heat recovery device, belongs to the field of waste heat recovery, and aims to solve the problem that impurities in gas are inconvenient to filter and clean conveniently, the self-cleaning boiler flue gas waste heat recovery device comprises a heat exchange box, and a fixed pipe is fixedly connected to the heat exchange box. The device is provided with a reciprocating screw rod; when waste heat recovery gas is filtered, impurities in the gas can be filtered through a filter screen in a treatment box, when the impurities on the filter screen are cleaned, an electric motor can be started to drive a reciprocating screw rod to operate, and the reciprocating screw rod can drive a fixing block to reciprocate during rotation; the fixing block drives the cleaning brush plate to move at the same time when moving, the cleaning brush plate can stably move through sliding supporting of the sliding block on the sliding rod when moving, the cleaning brush plate can clean impurities on the filter screen during reciprocating movement, and cleaned dust falls into the collecting box to be collected in a centralized mode. And the filter screen can avoid the situation that the gas is not filtered and is directly discharged.

Description

Technical Field

[0001] The utility model relates to the field of waste heat recovery, and in particular to a self-cleaning boiler flue gas waste heat recovery device. Background Art

[0002] The boiler flue gas waste heat recovery device is used to recover heat from the high-temperature flue gas discharged by the boiler and improve energy utilization efficiency. The device can significantly reduce energy costs, reduce exhaust emissions, and improve the overall efficiency of the system. It uses the heat in the flue gas to generate steam for power generation or industrial purposes. The total waste heat resources of various industries account for approximately 16% and 70% of their total fuel consumption, and the recyclable waste heat resources account for approximately 60% of the total waste heat resources. Directly discharging flue gas during the operation of the boiler is a huge waste of energy.

[0003] However, most of the current boiler flue gas waste heat recovery devices have the following problems:

[0004] For example, a boiler flue gas waste heat recovery device with the publication number CN217178556U can filter out impurities in the flue gas through the filter, but the filter box is connected to the receiving box. When the gas is filtered through the filter, some gas can be discharged through the receiving box, resulting in the gas not being filtered, affecting the subsequent cleaning effect, and making it inconvenient to filter and clean the impurities in the gas conveniently; at the same time, when the discharged gas is filtered through the filter cotton, in order to improve the filtering effect, the filter cotton is mostly fixedly installed in the equipment for a long time of filtration. There are too many impurities on the filter cotton, which is prone to clogging, affecting the subsequent filtering effect, and making it inconvenient to disassemble and replace the used filter cotton conveniently.

[0005] Therefore, we have made improvements to this problem and proposed a self-cleaning boiler flue gas waste heat recovery device. Utility Model Content

[0006] The purpose of the utility model is to address the current problems of inconvenience in conveniently filtering and cleaning impurities in the gas and inconvenience in conveniently disassembling and replacing the used filter cotton.

[0007] In order to achieve the above objectives, the present invention provides the following technical solutions:

[0008] A self-cleaning boiler flue gas waste heat recovery device is used to improve the above problems.

[0009] The specific application is as follows:

[0010] It includes a heat exchange box, a fixed pipe is fixedly connected to the heat exchange box, a processing box is fixedly connected to the fixed pipe, a splicing pipe is fixedly connected to the processing box, a filter is fixedly connected to the processing box, an electric motor is fixedly connected to the processing box, the output shaft of the electric motor is fixedly connected to a reciprocating screw, the reciprocating screw is rotatably connected to the processing box, a fixed block is threadedly connected to the reciprocating screw, a cleaning brush plate is fixedly connected to the fixed block, a slider is fixedly connected to the cleaning brush plate, the slider upper limit sliding connection is a slide rod, and the slide rod is fixedly connected to the processing box. Inside the box, the processing box is fixedly connected to the collection box, the collection box is bolted to a sealing plate, the heat exchange box is fixedly connected to a delivery pipe, the delivery pipe is fixedly connected to an exhaust box, the exhaust box is fixedly connected to a sealing gasket, a connecting frame is provided on the exhaust box, a filter frame is fixedly connected to the connecting frame, filter cotton is provided on the filter frame, the exhaust box is fixedly connected to a fixing frame, a spring is fixedly connected to the fixing frame, the other end of the spring is fixedly connected to a limiting plate, a block is fixedly connected to the limiting plate, and a pulling frame is fixedly connected to the limiting plate.

[0011] As a preferred technical solution of the present application, the output shaft of the electric motor is fixedly connected to the center of one end of the reciprocating screw, and the side end surface of the fixed block is in contact with the inner side surface of the processing box.

[0012] As a preferred technical solution of the present application, the center line of the fixed block and the center line of the slider are on the same horizontal line, and the side end surface of the cleaning brush plate is in contact with the side end surface of the filter screen.

[0013] As a preferred technical solution of the present application, the filter racks are evenly distributed in the exhaust box, and the exhaust box corresponds one-to-one with the filter cotton through the filter racks.

[0014] As a preferred technical solution of the present application, the fixing frames are symmetrically distributed on the left and right sides of the exhaust box, and the fixing frames correspond one-to-one with the pulling frames through limiting plates.

[0015] As a preferred technical solution of the present application, the pulling frame is limitedly slidably connected to the fixing frame, the exhaust box is fixedly connected to an exhaust pipe, and the cross section of the fixing frame is "T"-shaped.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In the scheme of this application:

[0018] 1. A reciprocating screw is provided; when filtering the gas recovered from waste heat, impurities in the gas can be filtered through the filter in the processing box. When cleaning the impurities on the filter, the electric motor can be turned on to drive the reciprocating screw to operate. The reciprocating screw can drive the fixed block to move back and forth when rotating, and the fixed block drives the cleaning brush plate to move at the same time when moving. The cleaning brush plate can move smoothly under the sliding support of the slider on the slide rod when moving. The cleaning brush plate can clean the impurities on the filter when reciprocating, and the cleaned dust can fall into the collection box for centralized collection, and the gas passing through the collection box can be filtered through the filter to avoid the situation where the gas is directly discharged without filtering.

[0019] 2. A connecting frame is provided; when taking out the filter frame for exhaust filtration and replacing the filter cotton on the filter frame, the pulling frames on the fixed frames on both sides can be pulled, and the pulling frames drive the limit plates to move. The limit plates can squeeze the springs when moving, and at the same time the limit plates can drive the blocks to disengage from the exhaust box and the connecting frame. When the connecting frame is unobstructed, the connecting frame and the filter frame can be taken out and disassembled, and the filter cotton on the filter frame can be taken out and replaced. When installing and resetting, the filter frame can be inserted into the exhaust box and sealed under the fit of the sealing gasket to avoid air leakage. Then loosen the pulling frames on both sides, and drive the limit plates and the block to reset under the push of the spring. The block can be engaged in the exhaust box and the connecting frame for fixed limit, thereby improving the installation and replacement of the filter effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the self-cleaning boiler flue gas waste heat recovery device provided in this application;

[0021] Figure 2 A schematic side view of the processing box of the self-cleaning boiler flue gas waste heat recovery device provided in this application;

[0022] Figure 3 A schematic diagram of the side view of the reciprocating screw structure of the self-cleaning boiler flue gas waste heat recovery device provided in this application;

[0023] Figure 4 A schematic side view of the connecting frame of the self-cleaning boiler flue gas waste heat recovery device provided in this application;

[0024] Figure 5 A schematic side view of the filter frame of the self-cleaning boiler flue gas waste heat recovery device provided in this application;

[0025] Figure 6 The self-cleaning boiler flue gas waste heat recovery device provided in this application Figure 5 Enlarged structural diagram at point A in the middle.

[0026] Markings in the figure: 1. Heat exchange box; 2. Fixed pipe; 3. Processing box; 4. Splicing pipe; 5. Filter; 6. Electric motor; 7. Reciprocating screw; 8. Fixed block; 9. Cleaning brush plate; 10. Slider; 11. Sliding rod; 12. Collecting box; 13. Sealing plate; 14. Delivery pipe; 15. Exhaust box; 16. Sealing gasket; 17. Connecting frame; 18. Filter frame; 19. Filter cotton; 20. Fixed frame; 21. Spring; 22. Limit plate; 23. Block; 24. Pull frame; 25. Exhaust pipe. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0028] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0031] In the description of this utility model, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product is typically placed when in use, or the orientations or positional relationships commonly understood by those skilled in the art. Such terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" and the like are used solely for distinction and description and should not be construed as indicating or implying relative importance.

[0032] Example 1:

[0033] like Figure 1-6As shown, this embodiment proposes a self-cleaning boiler flue gas waste heat recovery device, including a heat exchange box 1, a fixed pipe 2 is fixedly connected to the heat exchange box 1, a treatment box 3 is fixedly connected to the fixed pipe 2, a splicing pipe 4 is fixedly connected to the treatment box 3, a filter 5 is fixedly connected to the treatment box 3, an electric motor 6 is fixedly connected to the treatment box 3, an output shaft of the electric motor 6 is fixedly connected to a reciprocating screw 7, the reciprocating screw 7 is rotatably connected to the treatment box 3, a fixed block 8 is threadedly connected to the reciprocating screw 7, a cleaning brush plate 9 is fixedly connected to the fixed block 8, a slider 10 is fixedly connected to the cleaning brush plate 9, the slider 10 is slidably connected to the upper limit of the slider 11, and the slider 11 is fixedly connected In the processing box 3, a collecting box 12 is fixedly connected to the processing box 3, a sealing plate 13 is bolted to the collecting box 12, a conveying pipe 14 is fixedly connected to the heat exchange box 1, an exhaust box 15 is fixedly connected to the conveying pipe 14, a sealing gasket 16 is fixedly connected to the exhaust box 15, a connecting frame 17 is provided on the exhaust box 15, a filter frame 18 is fixedly connected to the connecting frame 17, a filter cotton 19 is provided on the filter frame 18, a fixing frame 20 is fixedly connected to the exhaust box 15, a spring 21 is fixedly connected to the fixing frame 20, the other end of the spring 21 is fixedly connected to a limiting plate 22, a blocking block 23 is fixedly connected to the limiting plate 22, and a pulling frame 24 is fixedly connected to the limiting plate 22.

[0034] Example 2:

[0035] The solution in Example 1 is further introduced below in conjunction with a specific working method, as described below:

[0036] like Figure 3 As shown, as a preferred embodiment, on the basis of the above method, the output shaft of the electric motor 6 is further fixedly connected to the center part of one end of the reciprocating screw 7, and the side end face of the fixed block 8 is in contact with the inner side face of the processing box 3, which can ensure that the fixed block 8 can move smoothly through the support of the inner side face of the processing box 3 when moving.

[0037] like Figure 3 As shown, as a preferred embodiment, on the basis of the above method, further, the center line of the fixed block 8 and the center line of the slider 10 are on the same horizontal line, and the side end face of the cleaning brush plate 9 is in contact with the side end face of the filter screen 5, which can ensure the cooperation between the fixed block 8 and the slider 10 and can drive the cleaning brush plate 9 to move back and forth smoothly.

[0038] like Figure 5 As shown, as a preferred embodiment, on the basis of the above method, the filter racks 18 are further distributed equidistantly in the exhaust box 15, and the exhaust box 15 corresponds one-to-one with the filter cotton 19 through the filter racks 18, which can ensure that the filter racks 18 and the filter cotton 19 are distributed equidistantly, and can smoothly filter the exhaust gas.

[0039] like Figure 6 As shown, as a preferred embodiment, on the basis of the above method, further, the fixing frame 20 is symmetrically distributed on the left and right sides of the exhaust box 15, and the fixing frame 20 corresponds one-to-one with the pulling frame 24 through the limiting plate 22, which can ensure that the limiting plates 22 on both sides can cooperate with the clamping block 23 to stably limit and fix the connecting frame 17.

[0040] like Figure 6 As shown, as a preferred embodiment, on the basis of the above method, further, the pulling frame 24 is connected to the fixed frame 20 in a limited sliding manner, the exhaust box 15 is fixedly connected to the exhaust pipe 25, and the cross-section of the fixed frame 20 is "T"-shaped, which can ensure that the "T"-shaped fixed frame 20 can easily move and engage with the connecting frame 17.

[0041] Specifically, the self-cleaning boiler flue gas waste heat recovery device is used in combination with Figure 1-6 When filtering the gas recovered from waste heat, the gas is transported to the processing box 3 through the splicing pipe 4, and then the impurities in the gas are filtered through the filter screen 5 in the processing box 3. When cleaning the impurities on the filter screen 5, the electric motor 6 can be turned on to drive the reciprocating screw 7 to operate. The reciprocating screw 7 can drive the fixed block 8 to move back and forth when rotating. The fixed block 8 drives the cleaning brush plate 9 to move at the same time when moving. The cleaning brush plate 9 can move smoothly under the sliding support of the slider 10 on the slide rod 11 when moving. The cleaning brush plate 9 can clean the impurities on the filter screen 5 when reciprocating, and the cleaned dust can fall into the collection box 12 for centralized collection, and the gas passing through the collection box 12 can be filtered through the filter screen 5 to avoid the situation where the gas is directly discharged without being filtered.

[0042] When it is necessary to clean and collect the impurities collected in the collection box 12, the bolts on the sealing plate 13 can be removed and taken out from the collection box 12 to centrally clean the dust and impurities. The filtered gas can be transported to the heat exchange box 1 through the fixed pipe 2. After the waste heat is recovered in the heat exchange box 1, it can be discharged to the exhaust box 15 through the delivery pipe 14. The discharged gas is filtered by the filter frame 18 and the filter cotton 19 in the exhaust box 15, and is discharged through the exhaust pipe 25 after the treatment is completed.

[0043] The filter holder 18 is then removed from the filter housing 15 and the filter cotton 19 is removed for replacement. When the filter holder 18 is removed from the filter housing 15 and the filter cotton 19 is replaced, the pull racks 24 on the fixing racks 20 on both sides can be pulled. The pull racks 24 drive the limit plates 22 to move. The limit plates 22 can squeeze the springs 21 when moving. At the same time, the limit plates 22 can drive the block 23 to disengage from the exhaust box 15 and the connecting rack 17. When the connecting rack 17 is unobstructed, the connecting rack 17 and the filter holder 18 can be removed and disassembled. The filter cotton 19 on the filter holder 18 can be removed and replaced. When installing and resetting, the filter holder 18 can be inserted into the exhaust box 15 and sealed under the fit of the sealing gasket 16 to avoid air leakage. Then, the pull racks 24 on both sides are loosened, and the limit plates 22 and the block 23 are reset under the push of the springs 21. The block 23 can be engaged in the exhaust box 15 and the connecting rack 17 for fixed limit, thereby improving the installation and replacement filtering effect.

[0044] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements that do not deviate from the spirit and scope of the utility model are included in the scope of the claims of the present invention.

Claims

1. A self-cleaning boiler flue gas waste heat recovery device, comprising a heat exchange box (1), characterized in that: The heat exchange box (1) is fixedly connected to a fixed pipe (2), the fixed pipe (2) is fixedly connected to a processing box (3), the processing box (3) is fixedly connected to a splicing pipe (4), the processing box (3) is fixedly connected to a filter (5), the processing box (3) is fixedly connected to an electric motor (6), the output shaft of the electric motor (6) is fixedly connected to a reciprocating screw (7), the reciprocating screw (7) is rotatably connected to the processing box (3), the reciprocating screw (7) is threadedly connected to a fixed block (8), the fixed block (8) is fixedly connected to a cleaning brush plate (9), the cleaning brush plate (9) is fixedly connected to a slider (10), the slider (10) is slidably connected to an upper limit of a slide rod (11), the slide rod (11) is fixedly connected to the processing box (3), the processing box (3) is fixedly connected to A collecting box (12) is provided, a sealing plate (13) is bolted to the collecting box (12), a delivery pipe (14) is fixedly connected to the heat exchange box (1), an exhaust box (15) is fixedly connected to the delivery pipe (14), a sealing gasket (16) is fixedly connected to the exhaust box (15), a connecting frame (17) is provided on the exhaust box (15), a filter frame (18) is fixedly connected to the connecting frame (17), a filter cotton (19) is provided on the filter frame (18), a fixing frame (20) is fixedly connected to the fixing frame (20), the other end of the spring (21) is fixedly connected to a limiting plate (22), a clamping block (23) is fixedly connected to the limiting plate (22), and a pulling frame (24) is fixedly connected to the limiting plate (22).

2. The self-cleaning boiler flue gas waste heat recovery device according to claim 1, characterized in that: The output shaft of the electric motor (6) is fixedly connected to the center of one end of the reciprocating screw (7), and the side end surface of the fixed block (8) is in contact with the inner side surface of the processing box (3).

3. The self-cleaning boiler flue gas waste heat recovery device according to claim 1, characterized in that: The center line of the fixed block (8) and the center line of the slider (10) are on the same horizontal line, and the side end surface of the cleaning brush plate (9) is in contact with the side end surface of the filter screen (5).

4. The self-cleaning boiler flue gas waste heat recovery device according to claim 1, characterized in that: The filter racks (18) are distributed in equal intervals in the exhaust box (15), and the exhaust box (15) corresponds to the filter cotton (19) one by one through the filter racks (18).

5. The self-cleaning boiler flue gas waste heat recovery device according to claim 1, characterized in that: The fixing frames (20) are symmetrically distributed on the left and right sides of the exhaust box (15), and the fixing frames (20) correspond to the pulling frames (24) one by one through the limiting plates (22).

6. The self-cleaning boiler flue gas waste heat recovery device according to claim 1, characterized in that: The pulling frame (24) is connected to the fixing frame (20) in a limited sliding manner, the exhaust box (15) is fixedly connected with an exhaust pipe (25), and the cross section of the fixing frame (20) is "T"-shaped.

Images