Flue gas filtering device for boiler waste heat recovery equipment

Abstract

The utility model discloses a flue gas filtering device for boiler waste heat recovery equipment, which comprises a fixed pipe, the left end and the right end of the fixed pipe are both communicated with connecting pipes, the other end of the connecting pipe on the left side is communicated with a flue gas outlet pipe of a boiler, and the other end of the connecting pipe on the right side is communicated with a gas inlet pipe of the boiler waste heat recovery equipment. By arranging a first baffle, a fixing cover, a clamping block, a second spring, a fixing frame, filter plates, a handle and a supporting plate, in the filtering operation process before boiler flue gas waste heat recovery through the device, when the filter plate on one side is used for a long time and needs to be replaced and cleaned, a new filter plate is placed in the fixing cover at the top of the corresponding filter plate, and the filter plate is replaced and cleaned; and then the handle is operated to control the new filter plate to replace the corresponding filter plate, so that the replacement operation of the filter plates in the use process of the boiler waste heat recovery equipment is realized, the influence on the use of the boiler waste heat recovery equipment during the replacement of the filter plates is avoided, and the continuity of boiler waste heat recovery is ensured.

Description

Technical Field

[0001] This utility model relates to the field of boiler waste heat recovery technology, and in particular to a flue gas filtration device for boiler waste heat recovery equipment. Background Technology

[0002] Boilers generate a large amount of waste heat during operation. If this waste heat is not recovered and utilized, it will be wasted. By using waste heat recovery equipment to recover the waste heat, it can be reused to heat water, air or other media, thereby improving energy utilization efficiency and reducing energy waste.

[0003] According to patent application number 202123143184.1, entitled "A Waste Heat Recovery Pipeline for Boiler Flue Gas Waste Heat Recovery," this patent includes a protective pipe and a limiting mechanism. A conveying pipe is installed on the protective pipe, and an insulated cavity is formed between the protective pipe and the conveying pipe. This waste heat recovery pipeline for boiler flue gas waste heat recovery uses a filter plate to filter the flue gas during the recovery process. This avoids the possibility of residual dust inside the flue gas affecting its use. Furthermore, the filter plate can be easily removed after filtration, facilitating cleaning or replacement and improving its filtration efficiency. The insulated cavity effectively reduces heat loss during flue gas transport, thereby improving the flue gas transport efficiency and increasing its utilization rate.

[0004] The aforementioned patent, by installing a filter plate before the waste heat recovery equipment, can filter out residual dust in the boiler flue gas, preventing it from affecting the operation of the equipment. However, subsequent replacement and cleaning of the filter plate requires removing the moving platform to access it. This disrupts the operation of the waste heat recovery equipment, as the filter plate cannot be removed for replacement and cleaning while the equipment is in use, thus affecting the continuity of waste heat recovery. Therefore, this patent proposes a flue gas filtration device for boiler waste heat recovery equipment to address these issues. Utility Model Content

[0005] The technical problem to be solved by this utility model overcomes the existing defects and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A flue gas filtration device for boiler waste heat recovery equipment includes a fixed pipe with connecting pipes at both ends. The other end of the left connecting pipe is connected to the boiler's flue gas outlet pipe, and the other end of the right connecting pipe is connected to the boiler waste heat recovery equipment's air inlet pipe. A fixed frame is in contact with the inner side of the fixed pipe, and a filter plate is fixedly connected to the inner side of the fixed frame. Fixed covers are connected to both the upper and lower ends of the fixed pipe. A second spring is fixedly connected to the top end of the inner side of the fixed pipe, and a locking block is fixedly connected to the other end of the second spring. The locking block is slidably connected to the fixed pipe and engages with the fixed frame. A push block penetrating the fixed pipe is fixedly connected to the top end of the locking block and is slidably connected to the fixed pipe. A controller is fixedly connected to the front end of the fixed pipe.

[0008] As a further improvement of this utility model, a first baffle is slidably connected to the inner top of the fixed cover at the top, and the first baffle passes through the fixed cover at the top. A first spring is fixedly connected to the inner side of the first baffle, and a fixed block that contacts the first baffle is fixedly connected to the other end of the first spring. The fixed block is fixedly connected to the fixed cover at the top.

[0009] As a further improvement of this utility model, the top of the inner side of the fixed cover at the bottom end is in contact with a support plate, the bottom end of the support plate is fixedly connected to a handle, and one end of the outer side of the fixed cover at the bottom end is hinged to a door.

[0010] As a further improvement of this utility model, the handle passes through the bottom fixing cover, the outer bottom end of the handle is provided with an external thread, and the handle is spirally connected to the bottom fixing cover.

[0011] As a further improvement of this utility model, a second baffle is provided at the right end of the filter plate. A slider that is slidably connected to the fixed tube is fixedly connected to one side of the second baffle. A third spring is fixedly connected to one side of the slider. A pressure block is fixedly connected to the other side of the third spring. A pressure sensor is fixedly connected to the outside of the pressure block. Both the pressure block and the pressure sensor are in contact with the fixed tube. An alarm is fixedly connected to one side of the fixed cover at the top.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. A flue gas filtration device for boiler waste heat recovery equipment, comprising a first baffle, a fixed cover, a locking block, a second spring, a fixed frame, a filter plate, a handle, and a support plate. During the filtration operation before boiler flue gas waste heat recovery, after the flue gas passes through the fixed pipe via the connecting pipe on the left, the filter plate with a fixed frame on both the inner and outer sides of the fixed pipe filters the dust residue inside the flue gas. When one side of the filter plate needs to be replaced after prolonged use, first open the first baffle inside the fixed cover at the top of the corresponding filter plate and place the new filter plate with a fixed frame on the outer side into the fixed cover at the top of the corresponding filter plate. Then, control the locking block on the corresponding side to disengage from the fixed frame on the outer side of the corresponding filter plate. Next, after rotating the handle corresponding to the fixed cover at the bottom of the corresponding filter plate to disengage from the screw connection with the fixed cover at the bottom of the corresponding filter plate, pull the corresponding support plate downwards using the corresponding handle to further control the flow of the filter gas. The corresponding filter plate is moved down into the fixed cover at the bottom of the corresponding filter plate, and at the same time, the new filter plate is moved down into the fixed tube to replace the filter plate. When the filter plate replacement is completed, the corresponding locking block is reset and locked into the fixed frame on the outside of the new filter plate. Then, the baffle door on the outside of the fixed cover on the corresponding side is opened to remove the replaced filter plate with the fixed frame on the outside for cleaning. When filtering boiler flue gas before waste heat recovery, when the filter plate on one side needs to be replaced and cleaned, the new filter plate is placed in the fixed cover on top of the corresponding filter plate, and then the new filter plate is replaced by the new filter plate controlled by the handle. This realizes the filter plate replacement operation during the use of the boiler waste heat recovery equipment, avoiding the impact of filter plate replacement on the use of the boiler waste heat recovery equipment and ensuring the continuity of boiler waste heat recovery.

[0014] 2. The flue gas filtration device used in boiler waste heat recovery equipment, through the setting of a second baffle, slider, third spring, pressure block, pressure sensor and alarm, when the device performs the filtration operation before the boiler flue gas waste heat recovery, because the more serious the blockage of the filter plate, the less wind resistance the second baffle on the right side of the filter plate, the less pressure the slider on the second spring on the outside of the second baffle, the less pressure the pressure block on the pressure sensor, and the lower the pressure value sensed by the pressure sensor. Therefore, when the pressure value sensed by the pressure sensor is lower than the set range, the alarm on the corresponding side will sound an alarm. In this way, when the filter plate on one side is seriously blocked, it realizes the automatic reminder for the staff to replace and clean the filter plate. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] Figure 1This is a schematic diagram of the overall structure of the flue gas filtration device for boiler waste heat recovery equipment according to this utility model.

[0017] Figure 2 This is a cross-sectional structural diagram of the flue gas filtration device for boiler waste heat recovery equipment according to this utility model.

[0018] Figure 3 This utility model relates to a flue gas filtration device for boiler waste heat recovery equipment. Figure 2 A schematic diagram of the structure at point A.

[0019] In the diagram: 1. Fixed pipe; 2. Connecting pipe; 3. Fixed frame; 4. Filter plate; 5. Fixed cover; 6. First baffle; 7. First spring; 8. Fixed block; 9. Second spring; 10. Locking block; 11. Pushing block; 12. Support plate; 13. Handle; 14. Door stop; 15. Second baffle; 16. Sliding block; 17. Third spring; 18. Pressure block; 19. Pressure sensor; 20. Alarm; 21. Controller. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. In order to better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable for those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0021] like Figure 1-3 As shown, a flue gas filtration device for boiler waste heat recovery equipment includes a fixed pipe 1. Both ends of the fixed pipe 1 are connected to connecting pipes 2. The other end of the left connecting pipe 2 is connected to the flue gas outlet pipe of the boiler, and the other end of the right connecting pipe 2 is connected to the air inlet pipe of the boiler waste heat recovery equipment. A fixed frame 3 is in contact with the inner side of the fixed pipe 2. A filter plate 4 is fixedly connected to the inner side of the fixed frame 3. Both ends of the fixed pipe 1 are connected to fixed covers 5. A second spring 9 is fixedly connected to the top end of the inner side of the fixed pipe 1. A locking block 10 is fixedly connected to the other end of the second spring 9 and is slidably connected to the fixed pipe 1. The locking block 10 is engaged with the fixed frame 3. A push block 11 that penetrates the fixed pipe 1 is fixedly connected to the top end of the locking block 1 and is slidably connected to the fixed pipe 1. A controller 21 is fixedly connected to the front end of the fixed pipe 1. Example

[0022] like Figure 1-3 As shown, in order to solve the problem of inconvenience in placing the new filter plate 4 inside the top fixing cover 5, a first baffle 6 is slidably connected to the top inner side of the top fixing cover 5, and the first baffle 6 penetrates the top fixing cover 5. A first spring 7 is fixedly connected to the inner side of the first baffle 6, and a fixing block 8 that contacts the first baffle 6 is fixedly connected to the other end of the first spring 7. The fixing block 8 is fixedly connected to the top fixing cover 5. By pushing the first baffle 6 inside the top fixing cover 5 to compress the first spring 7, it is convenient to place the new filter plate 4 inside the top fixing cover 5. Example

[0023] like Figure 1-2 As shown, in order to solve the problem of not being able to prevent a large amount of filtered dust from being shaken off when the filter plate 4 is moved down after use, the top of the inner side of the fixed cover 5 at the bottom end is in contact with a support plate 12. The bottom end of the support plate 12 is fixedly connected to a handle 13, and the outer end of the fixed cover 5 at the bottom end is hinged to a door 14. By controlling the support plate 12 to move down slowly through the handle 13, the filter plate 4 after use can be moved down slowly, which can prevent a large amount of filtered dust from being shaken off. Example

[0024] like Figure 2 As shown, in order to solve the problem of inconvenience in controlling the slide of the tray 12 through the handle 13, the handle 13 passes through the bottom fixing cover 5, the outer bottom end of the handle 13 is provided with an external thread, and the handle 13 is screwed to the bottom fixing cover 5. By rotating the handle 13, the screw connection with the bottom fixing cover 5 is disengaged, which makes it convenient to control the slide of the tray 12 through the handle 13. Example

[0025] like Figure 2 As shown, to address the issue of inconvenience in reminding staff when the filter plate 4 needs replacement and cleaning, a second baffle 15 is provided on the right end of the filter plate 4. A slider 16, which is slidably connected to the fixed tube 1, is fixedly connected to one end of the outer side of the second baffle 15. A third spring 17 is fixedly connected to one end of the outer side of the slider 16, and a pressure block 18 is fixedly connected to the other end of the third spring 17. A pressure sensor 19 is fixedly connected to the outer side of the pressure block 18, and both the pressure block 18 and the pressure sensor 19 are in contact with the fixed tube 1. An alarm 20 is fixedly connected to one end of the outer side of the fixed cover 5 at the top. As the filter plate 4 becomes more severely clogged, the wind resistance on the second baffle 15 on the right side of the filter plate 4 decreases, the pressure of the slider 16 on the outer side of the second baffle 15 on the second spring 17 decreases, the pressure of the pressure block 18 on the pressure sensor 19 decreases, and the pressure value sensed by the pressure sensor 19 decreases. Therefore, when the pressure value sensed by the pressure sensor 19 is lower than the set range, the alarm 20 is triggered, making it convenient to remind staff when the filter plate 4 needs replacement and cleaning.

[0026] In this embodiment, when using the device, the sensing range of the pressure sensor 19 is set by the controller 21. When the boiler waste heat recovery equipment recovers waste heat from the boiler flue gas, the flue gas inside the boiler is drawn by the pump in the waste heat recovery equipment and enters the fixed pipe 1 through the left connecting pipe 2. Then, after passing through the filter plate 4 in the fixed pipe 1 and the fixed pipe 1, it enters the waste heat recovery equipment through the right connecting pipe 2 for waste heat recovery. During this process, the filter plate 4, which has a fixed frame 3 on both the inner and outer sides of the fixed pipe 1, continuously filters the dust residue inside the flue gas. During the process of filtering the dust residue inside the flue gas through the filter plate 4, the more severe the blockage of the filter plate 4, the greater the wind resistance experienced by the second baffle 15 on the right side of the filter plate 4. The smaller the pressure, the less pressure the slider 16 on the outer side of the second baffle 15 exerts on the corresponding second spring 17, the less pressure the pressure block 18 exerts on the corresponding pressure sensor 19, and the smaller the pressure value sensed by the pressure sensor 19. Therefore, when the pressure value sensed by the corresponding pressure sensor 19 is lower than the set range, the alarm 20 on the corresponding side will sound an alarm to remind the staff that the filter plate 4 on one side is severely clogged. At this time, the staff first pushes the first baffle 6 inside the top fixing cover 5 of the corresponding filter plate 4 to compress the corresponding first spring 7, further opening the top fixing cover 5 of the corresponding filter plate 4. Then, a new filter plate 4 with a fixing frame 3 on the outside is placed inside the corresponding fixing cover 5. After resetting the corresponding first baffle 6, the corresponding push block 11 on the corresponding side pushes the filter plate 4 to the next step. The locking block 10 compresses the corresponding second spring 9, further disengaging the locking block 10 from the fixing frame 3 on the outer side of the corresponding filter plate 4. After completing the above operation, rotate the handle 13 corresponding to the fixing cover 5 at the bottom of the corresponding filter plate 4 to disengage it from the screw connection. Then, slowly pull the corresponding tray 12 down through the handle 13. At this time, the filter plate 4 with the fixing frame 3 on the outer side that needs to be replaced will continuously move into the fixing cover 5 at the bottom of the corresponding side. The new filter plate 4 with the fixing frame 3 on the outer side will continuously move into the fixing tube 1 to replace the used filter plate 4. When the replacement of the filter plate 4 is completed, reset the locking block 10 to engage with the fixing frame 3 on the outer side of the new filter plate 4, and then open the corresponding... Remove the filter plate 4 with the fixing frame 3 on the outside of the side bottom fixing cover 5 through the baffle 14 and clean it. Finally, reset the corresponding baffle 14. During the process of removing and cleaning the filter plate 4 on one side, the pressure value sensed by the pressure sensor 19 will also decrease due to the severe blockage of the filter plate 4 on the left side. Therefore, when both alarms 20 sound at the same time, replace and clean the filter plate 4 on the left side first. When the alarm 20 on the right side is deactivated after replacing the filter plate 4 on the left side, it is not necessary to replace and clean the filter plate 4 on the right side. If the alarm 20 on the right side is not deactivated after replacing the filter plate 4 on the left side, then replace and clean the filter plate 4 on the right side.

[0027] The above are preferred embodiments of the present invention. The basic principles, main features, and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope thereof. All such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas filtration device for boiler waste heat recovery equipment, comprising a fixed pipe (1), characterized in that: The fixed pipe (1) is connected to connecting pipes (2) at both ends. The other end of the connecting pipe (2) on the left is connected to the flue gas pipe of the boiler, and the other end of the connecting pipe (2) on the right is connected to the air inlet pipe of the boiler waste heat recovery equipment. The fixed pipe (1) is in contact with a fixed frame (3). A filter plate (4) is fixedly connected to the inside of the fixed frame (3). The fixed pipe (1) is connected to a fixed cover (5) at both ends. A second spring (9) is fixedly connected to the top of the inside of the fixed pipe (1). A locking block (10) is fixedly connected to the other end of the second spring (9). The locking block (10) is slidably connected to the fixed pipe (1). 10) Engages with the fixed frame (3), the top of the locking block (10) is fixedly connected to a push block (11) that penetrates the fixed tube (1), and the push block (11) is slidably connected to the fixed tube (1), and the front end of the fixed tube (1) is fixedly connected to a controller (21); the top of the fixed cover (5) at the top is slidably connected to a first baffle (6), and the first baffle (6) penetrates the top fixed cover (5), the inside of the first baffle (6) is fixedly connected to a first spring (7), the other end of the first spring (7) is fixedly connected to a fixed block (8) that contacts the first baffle (6), and the fixed block (8) is fixedly connected to the top fixed cover (5).

2. The flue gas filtration device for boiler waste heat recovery equipment according to claim 1, characterized in that: The bottom of the fixed cover (5) has a support plate (12) in contact with the top of the inner side. The bottom of the support plate (12) is fixedly connected to a handle (13). The bottom of the fixed cover (5) has a door (14) hinged to one end of the outer side.

3. The flue gas filtration device for boiler waste heat recovery equipment according to claim 2, characterized in that: The handle (13) passes through the bottom fixing cover (5), the bottom outer side of the handle (13) is provided with an external thread, and the handle (13) is spirally connected to the bottom fixing cover (5).

4. The flue gas filtration device for boiler waste heat recovery equipment according to claim 1, characterized in that: The filter plate (4) is provided with a second baffle (15) on the right end. A slider (16) that is slidably connected to the fixed tube (1) is fixedly connected to one end of the second baffle (15). A third spring (17) is fixedly connected to one end of the slider (16). A pressure block (18) is fixedly connected to the other end of the third spring (17). A pressure sensor (19) is fixedly connected to the outside of the pressure block (18). Both the pressure block (18) and the pressure sensor (19) are in contact with the fixed tube (1). An alarm (20) is fixedly connected to one end of the fixed cover (5) at the top.

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