A waste heat recovery device for power plants

Abstract

The invention discloses a waste heat recycling device for a power plant, which specifically relates to the field of waste heat utilization, including a heat exchange box, a branch pipe is fixedly installed inside the heat exchange box, one end of the branch pipe is connected to a smoke conveying pipe, a fixing frame is fixedly installed on the inner wall of the smoke conveying pipe, a shaft is rotatably connected inside the fixing frame, a transmission paddle is fixedly installed on one end of the shaft, the transmission paddle is rotatably connected to the inner side of the smoke conveying pipe, a guide is fixedly installed on the end of the shaft away from the transmission paddle, a filter plate is fixedly installed on the inner wall of the smoke conveying pipe, a scraper is slidably connected inside the smoke conveying pipe, the scraper and the filter plate are arranged in a fitted shape, a baffle is fixedly installed on one side of the scraper, and a guide groove is fixedly installed on one side of the baffle. The invention filters the flue gas through the filter plate by setting the filter plate and the scraper, and removes the impurities filtered on one side of the filter plate by the reciprocating sliding of the scraper, thereby avoiding the phenomenon that the filter plate is blocked and the flue gas cannot pass.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat utilization, and more specifically, to a waste heat recycling device for a power plant. Background Art

[0002] Power plants generate electricity by burning coal, and a lot of waste heat is generated in the process of power generation. In order to avoid heat loss, the waste heat needs to be reused. When coal is burned, impurities such as dust are generated. When the heat in the hot air flow is recovered, the impurities will condense in the pipe. The backlog over time will cause the pipe wall to thicken, reducing the efficiency of heat recovery.

[0003] Chinese invention CN217430982U discloses a waste heat recycling device for a waste incineration power plant, comprising: a water collecting frame, a smoke outlet pipe is arranged inside the water collecting frame; the two ends of the smoke outlet pipe respectively penetrate the left and right outer walls of the water collecting frame. The invention optimizes the installation method of the filter plate, which is simple and convenient to install the filter plate, has a relatively small overall structure, and reduces the installation and maintenance costs of the filter plate, which is beneficial to the long-term development of the power plant. Although the above application achieves filtration of the fluid in the smoke outlet pipe, the impurities accumulated on the surface of the filter plate will gradually increase during long-term use, which will cause the filter plate to be blocked and the fluid cannot pass through. Therefore, in view of this problem, how to design a waste heat recycling device for a power plant has become a problem that needs to be solved at present. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a waste heat recycling device for a power plant, which filters the flue gas through the filter plate by arranging a filter plate and a scraper, and removes impurities filtered on one side of the filter plate by the reciprocating sliding of the scraper, thereby avoiding clogging of the filter plate and causing the flue gas to be unable to pass through, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a waste heat recycling device for a power plant, comprising a heat exchange box, characterized in that: a branch pipe is fixedly installed inside the heat exchange box, one end of the branch pipe is connected to a smoke conveying pipe, a fixing frame is fixedly installed on the inner wall of the smoke conveying pipe, an axle rod is rotatably connected inside the fixing frame, a transmission paddle is fixedly installed on one end of the axle rod, the transmission paddle is arranged inside the smoke conveying pipe, a guide member is fixedly installed on the end of the axle rod away from the transmission paddle, a filter plate is fixedly installed on the inner wall of the smoke conveying pipe, a scraper is slidably connected inside the smoke conveying pipe, the scraper and the filter plate are arranged in a close fit, a baffle is fixedly installed on one side of the scraper, a guide rail groove is fixedly installed on one side of the baffle, a slide rod is slidably connected to the inner side of the guide rail groove, and the slide rod is fixedly installed on one side of the guide member.

[0006] Furthermore, a switch door is hinged inside the smoke conveying pipe, a first spring is provided on one side of the switch door, and the first spring is fixedly mounted on the inner wall of the smoke conveying pipe. A support is hinged on the inner wall of the smoke conveying pipe, a second spring is provided on one side of the support, and the second spring is fixedly mounted on the inner wall of the smoke conveying pipe.

[0007] Furthermore, a cleaning piece is fixedly installed on the inner side of the support, a storage box is connected to the bottom of the smoke conveying pipe, a bottom plate is slidably connected to the inner wall of the storage box, and a reciprocating screw rod is rotatably connected to the interior of the heat exchange box.

[0008] Furthermore, a transmission member is sleeved on the outer side of the reciprocating screw rod, a limit rod is fixedly installed on the inner wall of the heat exchange box, and the transmission member is slidably connected to the outer side of the limit rod.

[0009] Furthermore, a flow-pushing plate is fixedly mounted on one side of the transmission member, and a motor is fixedly mounted on one side of the heat exchange box.

[0010] Furthermore, a pulley is fixedly mounted on the output end of the motor, and the reciprocating screw is fixedly mounted on one side of the pulley.

[0011] Furthermore, a belt is sleeved on the outer side of the pulley, a recycling box is fixedly installed on one side of the heat exchange box, and the branch pipe is fixedly installed inside the recycling box.

[0012] Technical effects and advantages of the present invention:

[0013] 1. The present invention provides a filter plate and a scraper to filter the flue gas through the filter plate, and removes impurities filtered on one side of the filter plate by reciprocating sliding of the scraper, thereby avoiding the phenomenon that the filter plate is blocked and the flue gas cannot pass through. At the same time, the impurities are stored in the storage box, so that the impurities can be cleaned centrally;

[0014] 2. The present invention sets a transmission member and a flow-pushing plate, and starts the motor to make the pulley drive the reciprocating screw to rotate, so that the transmission member can slide back and forth inside the heat exchange box, thereby pushing the water in the heat exchange box through the slide bar, causing the water in the heat exchange box to roll, and then making the water temperature at each position in the heat exchange box at an average temperature, thereby avoiding the phenomenon that the heat exchange efficiency is reduced due to local temperature rise of the water in the heat exchange box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a partial structural cross-sectional view of the present invention.

[0016] Figure 2 For the present invention Figure 1 A-section structure enlarged view.

[0017] Figure 3 For the present invention Figure 1 Enlarged view of the structure of part B.

[0018] Figure 4 For the present invention Figure 1 Enlarged view of the C structure.

[0019] Figure 5 It is a side structural sectional view of the present invention.

[0020] The accompanying drawings are marked as follows: 1. heat exchange box; 2. branch pipe; 3. smoke conveying pipe; 4. fixing frame; 5. shaft rod; 6. transmission paddle; 7. guide member; 8. filter plate; 9. scraper; 10. baffle; 11. guide rail groove; 12. slide rod; 13. switch door; 14. reciprocating screw rod; 15. transmission member; 16. limit rod; 17. push flow plate; 18. motor; 19. pulley; 20. belt; 21. recycling box; 22. first spring; 23. support member; 24. second spring; 25. cleaning member; 26. storage box; 27. bottom plate. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Refer to the instruction manual Figure 1-4 ,like Figure 1 As shown, a waste heat recycling device for a power plant according to an embodiment of the present invention comprises a heat exchange box 1, a branch pipe 2 is fixedly installed inside the heat exchange box 1, a heat exchange medium is arranged inside the heat exchange box 1, the heat exchange medium is directly or indirectly in contact with each branch pipe 2, a seal is arranged at the end of the heat exchange box 1 and the connection between each pipe, and one end of the branch pipe 2 is connected to a smoke conveying pipe 3, as shown in FIG. Figure 2 As shown, a fixing frame 4 is fixedly installed on the inner wall of the smoke delivery pipe 3. The upper end of the fixing frame 4 is a sleeve structure, and a shaft 5 is rotatably connected inside the fixing frame 4. A transmission paddle 6 is fixedly installed on one end of the shaft 5. The transmission paddle 6 is arranged inside the smoke delivery pipe 3. A guide member 7 is fixedly installed on the end of the shaft 5 away from the transmission paddle 6. A filter plate 8 is fixedly installed on the inner wall of the smoke delivery pipe 3. Figure 3 As shown, a scraper 9 is slidably connected to the inside of the smoke conveying pipe 3, and the scraper 9 is arranged in a close fit with the filter plate 8. A baffle 10 is fixedly installed on one side of the scraper 9, and a guide groove 11 is fixedly installed on one side of the baffle 10. A slide bar 12 is slidably connected to the inner side of the guide groove 11, and the slide bar 12 is fixedly installed on one side of the guide member 7, so that the scraper can move along the slide bar, as shown in FIG. Figure 4As shown, the interior of the smoke delivery pipe 3 is hinged with a switch door 13, and a first spring 22 is provided on one side of the switch door 13. The first spring 22 is fixedly mounted on the inner wall of the smoke delivery pipe 3. The switch door 13 is used to limit the position of the scraper 9 to adjust the working state of the scraper. Through the setting of the switch door 13, when it is not in contact with the scraper 9, it is in a closed state under the action of the first spring 22, and it can also prevent impurities entering the storage box 26 from floating out. The inner wall of the smoke delivery pipe 3 is hinged with a support member 23, and a second spring 24 is provided on one side of the support member 23. The second spring 24 is fixedly mounted on the inner wall of the smoke delivery pipe 3. A cleaning member 25 is fixedly mounted on the inner side of the support member 23. Driven by the spring, the cleaning member 25 can complete a certain range of actions to clear the accumulated dust, such as Figure 1 As shown, a storage box 26 is provided at the bottom of the smoke conveying pipe 3, and a bottom plate 27 is slidably connected to the inner wall of the storage box 26.

[0023] It should be noted that, the flue gas generated by combustion during the power generation process is input into the interior of the multiple branch pipes 2 through the smoke conveying pipe 3. The branch pipe 2 is arranged in a curved shape, so that the contact time with the water in the heat exchange box 1 can be prolonged, and the heat exchange with the water in the heat exchange box 1 can be more sufficient. At the same time, before the hot air such as the flue gas enters the multiple branch pipes 2, it will be filtered through the filter plate 8, so that the impurities carried in the flue gas are restricted to one side of the filter plate 8, so as to avoid the impurities from entering the branch pipe 2 together and causing the branch pipe 2 to be blocked. At the same time, when the flue gas flows in the smoke conveying pipe 3, it will affect the transmission propeller 6 impacts, causing the transmission paddle 6 to rotate. When the transmission paddle 6 rotates, the guide member 7 is driven to rotate through the shaft 5, and then the slide bar 12 is driven to slide on the inner side of the guide groove 11, so that the guide groove 11 slides back and forth, and then the impurities filtered on one side of the filter plate 8 are scraped off from the surface of the filter plate 8 by the scraper 9. At the same time, the transverse length of the baffle 10 is gradually increased from top to bottom, and the baffle 10 is L-shaped to wrap the scraper 9 inside, so that when the impurities above the filter plate 8 are scraped off and fall, they will fall on the bottom of the baffle 10 perpendicular to the filter plate 8 The top of the horizontal plate of the filter plate 8 is formed with a baffle plate 10 to block the airflow, thereby preventing impurities from leaving the surface of the filter plate 8 and being blown away by the airflow, thereby facilitating the concentration of impurities. When the scraper plate 9 moves to one side of the switch door 13, the scraper plate 9 will push the switch door 13 to turn the switch door 13 over. At the same time, the first spring 22 will contract, so that the scraper plate 9 enters one side of the switch door 13. At the same time, when the baffle plate 10 overlaps with the cleaning member 25, the cleaning member 25 will contact the side of the baffle plate 10 on which the scraper plate 9 is installed, thereby removing the impurities on one side of the baffle plate 10 from the surface of the baffle plate 10. The impurities scraped off the surface of the scraper 9 and fall into the interior of the storage box 26. At the same time, when the scraper 9 contacts the cleaning piece 25, the scraper 9 will push the cleaning piece 25 to cause the support piece 23 to flip over, so that the cleaning piece 25 scrapes one side of the scraper 9, so that the impurities scraped off by the scraper 9 enter the storage box 26, avoiding impurities remaining on the surface of the scraper 9. By making the scraper 9 repeat the above movement, the impurities filtered by the filter plate 8 are cleared in time to avoid the accumulation of impurities. At the same time, the bottom plate 27 can be separated from the storage box 26 by pulling out the bottom plate 27, so that the impurities can be cleared in a centralized manner.

[0024] Further, such as Figure 1 As shown, the heat exchange box 1 is internally rotatably connected with a reciprocating screw rod 14, the outer side of the reciprocating screw rod 14 is sleeved with a transmission member 15, the inner wall of the heat exchange box 1 is fixedly installed with a limit rod 16, and the transmission member 15 is slidably connected to the outer side of the limit rod 16, as shown in FIG. Figure 1 As shown, a flow pusher 17 is fixedly installed on one side of the transmission member 15, and a motor 18 is fixedly installed on one side of the heat exchange box 1. Figure 4As shown, a pulley 19 is fixedly mounted on the output end of the motor 18, the reciprocating screw rod 14 is fixedly mounted on one side of the pulley 19, a belt 20 is sleeved on the outer side of the pulley 19, and another pulley is mounted on the outer shell of the heat exchange box 1, as shown in FIG. Figure 1 As shown, a recycling box 21 is fixedly installed on one side of the heat exchange box 1, and the branch pipe 2 is fixedly installed inside the recycling box 21. Through the setting of the recycling box 21, cold water is filled in the recycling box 21. When the temperature of the water in the heat exchange box 1 gradually increases, the heat exchange efficiency of the branch pipe 2 will be reduced, so that the heat of the branch pipe 2 is recovered again through the recycling box 21, thereby avoiding the phenomenon of insufficient utilization of waste heat.

[0025] It should be noted that, by starting the motor 18, the pulley 19 drives the reciprocating screw 14 to rotate, and at the same time, the limit rod 16 limits the transmission member 15, so that the transmission member 15 can slide back and forth in the heat exchanger box 1. When the transmission member 15 moves, it will also drive the flow-pushing plate 17 to slide inside the heat exchanger box 1, thereby pushing the water in the heat exchanger box 1, causing the water in the heat exchanger box 1 to roll, and then making the water temperature at each position in the heat exchanger box 1 at an average temperature, thereby avoiding the phenomenon that the heat exchange efficiency is reduced due to local heating of the water in the heat exchanger box 1, and at the same time, the flow-pushing plate 17 on the other side can be driven to move through the pulley 19 and the belt 20, thereby working at the same time to speed up the efficiency of the average water temperature.

[0026] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0027] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0028] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste heat recycling device for a power plant, comprising a heat exchange box (1), characterized in that: A branch pipe (2) is fixedly installed inside the heat exchange box (1), one end of the branch pipe (2) is connected to a smoke conveying pipe (3), a fixing frame (4) is fixedly installed on the inner wall of the smoke conveying pipe (3), a shaft (5) is rotatably connected inside the fixing frame (4), one end of the shaft (5) is fixedly installed with a transmission paddle (6), the transmission paddle (6) is arranged inside the smoke conveying pipe (3), and a guide member (6) is fixedly installed on the end of the shaft (5) away from the transmission paddle (6) 7), a filter plate (8) is fixedly mounted on the inner wall of the smoke conveying pipe (3), a scraper (9) is slidably connected to the interior of the smoke conveying pipe (3), the scraper (9) and the filter plate (8) are arranged in a close-fitting manner, a baffle (10) is fixedly mounted on one side of the scraper (9), a guide rail groove (11) is fixedly mounted on one side of the baffle (10), a slide rod (12) is slidably connected to the inner side of the guide rail groove (11), and the slide rod (12) is fixedly mounted on one side of the guide member (7).

2. The waste heat recycling device for a power plant according to claim 1, characterized in that: The interior of the smoke conveying pipe (3) is hinged with a switch door (13), one side of the switch door (13) is provided with a first spring (22), the first spring (22) is fixedly mounted on the inner wall of the smoke conveying pipe (3), the inner wall of the smoke conveying pipe (3) is hinged with a support member (23), one side of the support member (23) is provided with a second spring (24), the second spring (24) is fixedly mounted on the inner wall of the smoke conveying pipe (3).

3. The waste heat recycling device for a power plant according to claim 2, characterized in that: A cleaning piece (25) is fixedly mounted on the inner side of the support piece (23); a storage box (26) is connected to the bottom of the smoke conveying pipe (3); a bottom plate (27) is slidably connected to the inner wall of the storage box (26); and a reciprocating screw rod (14) is rotatably connected to the interior of the heat exchange box (1).

4. The waste heat recycling device for a power plant according to claim 3, characterized in that: A transmission member (15) is sleeved on the outer side of the reciprocating screw rod (14), a limit rod (16) is fixedly mounted on the inner wall of the heat exchange box (1), and the transmission member (15) is slidably connected to the outer side of the limit rod (16).

5. The waste heat recycling device for a power plant according to claim 4, characterized in that: A flow-pushing plate (17) is fixedly mounted on one side of the transmission member (15), and a motor (18) is fixedly mounted on one side of the heat exchange box (1).

6. The waste heat recycling device for a power plant according to claim 5, characterized in that: A pulley (19) is fixedly mounted on the output end of the motor (18), and the reciprocating screw rod (14) is fixedly mounted on one side of the pulley (19).

7. The waste heat recycling device for a power plant according to claim 6, characterized in that: A belt (20) is sleeved on the outer side of the pulley (19), a recycling box (21) is fixedly installed on one side of the heat exchange box (1), and the branch pipe (2) is fixedly installed inside the recycling box (21).

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