Flue gas waste heat recovery heat exchanger

Abstract

The utility model discloses a flue gas waste heat recovery heat exchanger which comprises an installation box and a cleaning mechanism, a smoke inlet barrel, a heat exchange pipe, a smoke outlet barrel, the cleaning mechanism, a second filter plate, a third filter plate, a conveying pipe, a stirring assembly and a gas outlet pipe are installed in the installation box from left to right, and one end of the smoke inlet barrel is fixedly connected with the heat exchange pipe. A smoke outlet barrel is fixedly mounted at the end, away from the smoke inlet barrel, of the heat exchange pipe, the hole of the second filter plate is larger than that of the third filter plate, the mounting box comprises a box body, a partition plate, a first compartment, a second compartment, a third compartment, a fourth compartment, a connecting frame, a connecting plate, screws and a sealing strip, and the connecting frame is fixedly mounted on the rear side of the box body. According to the flue gas waste heat recovery heat exchanger, the second filter plate and the third filter plate are cleaned through the cleaning mechanism, blockage is avoided, the trouble of manual cleaning is reduced, and the flue gas waste heat recovery heat exchanger is integrated through the mounting box, so that the flue gas waste heat recovery heat exchanger is convenient to carry, and parts in the flue gas waste heat recovery heat exchanger are convenient to maintain.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas waste heat recovery heat exchangers, specifically a flue gas waste heat recovery heat exchanger. Background Technology

[0002] A flue gas waste heat recovery heat exchanger is a device used to recover waste heat from industrial exhaust gases. It has wide applications in various fields, including chemical, power, food processing, and petrochemical industries. Flue gas waste heat recovery heat exchangers enable the repeated use of industrial exhaust gases, thereby conserving resources.

[0003] Referring to Chinese Patent Publication No. CN219223421U, published on June 20, 2023, a flue gas waste heat recovery heat exchanger is disclosed, including a recovery box. An inlet and an outlet flue are fixedly connected to the side wall of the recovery box, penetrating the side wall of the recovery box. The inlet and outlet flue are symmetrically arranged. Multiple heat exchange tubes are fixedly connected to the side wall between the inlet and outlet flue, located inside the recovery box. An inlet water pipe and an outlet water pipe are fixedly connected to the side wall of the recovery box. This utility model improves the recovery effect of flue gas waste heat and simultaneously purifies the flue gas.

[0004] However, the filter plates of existing flue gas waste heat recovery heat exchangers require manual cleaning by staff, which is quite troublesome. Furthermore, each process requires a separate enclosure, making maintenance, repair, and transportation inconvenient, as exemplified by the comparative patent mentioned above. Therefore, we propose a flue gas waste heat recovery heat exchanger to address the aforementioned issues. Utility Model Content

[0005] The purpose of this utility model is to provide a flue gas waste heat recovery heat exchanger to solve the problems mentioned in the background art, such as the filter plates of the existing flue gas waste heat recovery heat exchangers needing to be cleaned by the staff, which is quite troublesome, and each process is in an independent box, which is inconvenient for maintenance, repair and transportation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flue gas waste heat recovery heat exchanger, comprising an installation box and a cleaning mechanism. The installation box contains, from left to right, an inlet chimney, a heat exchange tube, an outlet chimney, a cleaning mechanism, a second filter plate, a third filter plate, a conveying pipe, a stirring assembly, and an outlet pipe. One end of the inlet chimney is fixedly connected to the heat exchange tube, and the outlet chimney is fixedly installed at the end of the heat exchange tube away from the inlet chimney. The pore size of the second filter plate is larger than that of the third filter plate.

[0007] Preferably, the mounting box includes a box body, partitions, a first compartment, a second compartment, a third compartment, a fourth compartment, a connecting frame, a connecting plate, screws, and a sealing strip, with the connecting frame fixedly installed on the rear side of the box body.

[0008] Preferably, a connecting plate is fixedly connected to the end of the connecting frame away from the box body by screws, a sealing strip is installed on the end of the connecting plate located inside the box body, and multiple partitions are fixedly installed inside the box body.

[0009] Preferably, the partition divides the housing into a first compartment, a second compartment, a third compartment, and a fourth compartment. The first compartment is equipped with a heat exchange tube, and the second compartment is equipped with a cleaning mechanism, a second filter plate, and a third filter plate.

[0010] Preferably, a conveying pipe is provided in the third compartment, a stirring assembly is provided in the fourth compartment, an inlet chimney and a liquid outlet pipe are fixedly installed inside the left side wall of the box, an outlet pipe and a liquid outlet pipe are fixedly installed inside the right side wall of the box, and an inlet pipe is fixedly installed inside the top wall of the box.

[0011] Preferably, the cleaning mechanism includes a motor, a lead screw, a moving block, an auxiliary rod, a collection box, a first filter plate, a blower, a blower pipe, and a fixed pipe head, with the lead screw fixedly connected to the top of the motor output.

[0012] Preferably, the lead screw is rotatably connected inside the first partition on the left, and a movable block is threadedly connected to the outside of the lead screw. An auxiliary rod is connected through the front and rear ends of the movable block, and the auxiliary rod is fixedly installed inside the first partition on the side.

[0013] Preferably, a collection box is fixedly installed at one end of the movable block, and an exhaust fan and a first filter plate are fixedly installed inside the collection box, with the exhaust fan located to the left of the first filter plate.

[0014] Preferably, the exhaust end of the exhaust fan is fixedly connected to an exhaust pipe, and a fixed pipe head is fixedly installed inside the right side wall of the collection box, with the fixed pipe head located on the left side of the second filter plate.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the flue gas waste heat recovery heat exchanger cleans the second and third filter plates through a cleaning mechanism to avoid clogging and reduce the trouble of manual cleaning. Through the installation box, the device is integrated, making it easy to transport and easy to maintain and repair the internal parts.

[0016] 1. A cleaning mechanism is provided. The collection box is equipped with an exhaust fan, a first filter plate, and an exhaust pipe head. The exhaust fan draws the dust from the second and third filter plates into the collection box through the exhaust pipe head. The dust is blocked by the first filter plate.

[0017] Furthermore, a movable block is fixedly installed on the outside of the collection box, and a screw is threadedly connected to the inside of the movable block. The rotating screw drives the movable block to rise and fall, thereby driving the collection box to rise and fall, so as to clean the filter plate more thoroughly.

[0018] Furthermore, an auxiliary rod is connected through the front and rear ends of the moving block. The auxiliary rod is fixedly installed in the first partition on the left side, so that the moving block can move stably, thereby making the collection box collect stably.

[0019] 2. It is equipped with an installation box, which is divided into four compartments by three partitions. Each compartment has a different function, making the device easy to move.

[0020] Furthermore, a connecting plate is fixed to the rear of the enclosure with screws, and all internal parts can be maintained and repaired by removing the screws;

[0021] Furthermore, to remove the dust inside the collection box, simply remove the connecting plate and open the front door of the collection box. Attached Figure Description

[0022] Figure 1 This is a frontal sectional view of the present invention.

[0023] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 This is a top view sectional diagram of the present invention;

[0025] Figure 4 This utility model Figure 3 Enlarged structural diagram at point B;

[0026] Figure 5 This is a schematic diagram of the rear view structure of this utility model.

[0027] In the diagram: 1. Inlet chimney; 2. Heat exchanger tube; 3. Outlet chimney; 4. Conveying pipe; 5. Stirring assembly; 6. Exhaust pipe; 7. Mounting box; 701. Box body; 702. Partition plate; 703. First compartment; 704. Second compartment; 705. Third compartment; 706. Fourth compartment; 707. Connecting frame; 708. Connecting plate; 709. Screw; 710. Sealing strip; 8. Cleaning mechanism; 801. Motor; 802. Lead screw; 803. Moving block; 804. Auxiliary rod; 805. Collection box; 806. First filter plate; 807. Exhaust fan; 808. Exhaust pipe; 809. Fixed pipe head; 9. Second filter plate; 10. Third filter plate. Detailed Implementation

[0028] 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.

[0029] Please see Figures 1-5 The present invention provides the following technical solution:

[0030] Example 1: The second filter plate (9) and the third filter plate (10) of the existing flue gas waste heat recovery heat exchanger are prone to clogging. To solve this technical problem, this example discloses the following technical content:

[0031] A flue gas waste heat recovery heat exchanger includes an installation box 7 and a cleaning mechanism 8. The installation box 7 is equipped with, from left to right, an inlet chimney 1, a heat exchange tube 2, an outlet chimney 3, a cleaning mechanism 8, a second filter plate 9, a third filter plate 10, a conveying pipe 4, a stirring assembly 5, and an outlet pipe 6. One end of the inlet chimney 1 is fixedly connected to the heat exchange tube 2, and the outlet chimney 3 is fixedly installed at the end of the heat exchange tube 2 away from the inlet chimney 1. The pore size of the second filter plate 9 is larger than that of the third filter plate 10.

[0032] like Figures 1-4 As shown, the second compartment 704 is equipped with a cleaning mechanism 8, a second filter plate 9, and a third filter plate 10. The cleaning mechanism 8 includes a motor 801, a lead screw 802, a moving block 803, an auxiliary rod 804, a collection box 805, a first filter plate 806, an exhaust fan 807, an exhaust pipe 808, and a fixed pipe head 809. The exhaust fan 807 and the first filter plate 806 are fixedly installed in the collection box 805. The exhaust end of the exhaust fan 807 is fixedly connected to the exhaust pipe 808. The exhaust fan 807 is located to the left of the first filter plate 806, and the exhaust port of the exhaust pipe 808 faces the first filter plate 806. A fixed pipe head 809 is fixedly installed inside the right wall of the filter plate 806 and the collection box 805. The fixed pipe head 809 is located to the left of the second filter plate 9 and the exhaust port is facing the second filter plate 9. At the same time, the exhaust fan 807 is started, and the fixed pipe head 809 draws the dust in the second filter plate 9 and the third filter plate 10 into the collection box 805. The fixed pipe head 809 is located to the left of the second filter plate 9, and the dust is blocked by the second filter plate 9. The pores of the second filter plate 9 are smaller than the pores of the third filter plate 10, thereby cleaning the dust in the second filter plate 9 and the third filter plate 10 to the right of the fixed pipe head 809.

[0033] The motor 801 is started. A lead screw 802 is fixedly connected to the top of the output of the motor 801. The lead screw 802 is rotatably connected to the first partition 702 on the left. The motor 801 drives the lead screw 802 to rotate. A moving block 803 is threadedly connected to the outside of the lead screw 802. The lead screw 802 drives the moving block 803 to rise and fall. A collection box 805 is fixedly installed at one end of the moving block 803. The moving block 803 drives the collection box 805 to rise and fall. With the lifting and falling, the dust on the second filter plate 9 and the third filter plate 10 is cleaned more thoroughly. Since the exhaust fan 807 has a large power, the third filter plate 10 can also be cleaned. The area of ​​dust that can be cleaned from the second filter plate 9 and the third filter plate 10 is also larger. An auxiliary rod 804 is connected through the front and rear ends of the moving block 803. The auxiliary rod 804 is fixedly installed in the first partition 702 on the side, so that the moving block 803 moves stably when it rises and falls, thereby allowing the collection box 805 to move stably.

[0034] Example 2: Existing flue gas waste heat recovery heat exchangers are inconvenient to maintain and repair. To solve this technical problem, this example discloses the following technical content:

[0035] like Figures 1-5 As shown, the installation box 7 includes a box body 701, partitions 702, a first compartment 703, a second compartment 704, a third compartment 705, a fourth compartment 706, a connecting frame 707, a connecting plate 708, screws 709, and a sealing strip 710. Inside the installation box 7, from left to right, are installed the inlet chimney 1, heat exchange tube 2, outlet chimney 3, cleaning mechanism 8, second filter plate 9, third filter plate 10, conveying pipe 4, stirring assembly 5, and exhaust pipe 6. Multiple partitions 702 are fixedly installed inside the box body 701, dividing the box body 701 into the first compartment 703, second compartment 704, third compartment 705, and fourth compartment 706. The first compartment 703 contains the heat exchange tube 2, which is located on the left side. The right ends are respectively fixedly installed with a smoke outlet 3 and an exhaust pipe 6, and the smoke outlet 3 and the exhaust pipe 6 are respectively fixedly installed inside the left side wall of the box 701 and the wall of the first partition 702 on the left. The second compartment 704 is equipped with a cleaning mechanism 8, a second filter plate 9 and a third filter plate 10. The third compartment 705 is equipped with a conveying pipe 4, and the output end and input end of the conveying pipe 4 are respectively fixedly installed inside the walls of the second and third partitions 702 on the left. The fourth compartment 706 is equipped with a stirring assembly 5. The exhaust pipe 6 is fixedly installed inside the right side wall of the box 701. The box 701 is divided into four spaces by the three partitions 702, which makes it more convenient to process parts in the factory, and the use of a single box 701 makes the device easy to transport.

[0036] A connecting frame 707 is fixedly installed on the rear side of the housing 701. A connecting plate 708 is fixedly connected to the end of the connecting frame 707 away from the housing 701 by screws 709. When maintenance and repair of the parts of the housing 701 are required, all screws 709 are unscrewed and the connecting plate 708 is removed. When cleaning the dust in the collection box 805, the connecting plate 708 is removed and the door connected to the front of the collection box 805 is opened. A sealing strip 710 is installed on the inner side of the connecting plate 708, which can improve the sealing performance of the housing 701.

[0037] Working principle: A liquid inlet pipe is fixedly installed inside the top wall of the housing 701. Opening its valve injects water into the first compartment 703. Flue gas enters the heat exchange tube 2 from the inlet pipe 1. The hot flue gas flows within the heat exchange tube 2, transferring heat to the water. A water outlet pipe is fixedly installed at the bottom of the left side wall of the housing 701 to heat the water. Once the water reaches a certain temperature, it is discharged from the outlet pipe for reuse. Water is then injected back into the first compartment 703, causing the water to circulate and heat up. The cooled flue gas is discharged from the outlet pipe 3 and enters the second compartment 704. The second filter plate 9 and the third filter plate 10 filter the dust in the flue gas. The second filter plate 9 has a larger pore size than the third filter plate 10. After two rounds of filtration, the filtration effect is better. The filtered flue gas enters the fourth compartment 706 through the conveying pipe 4. The fourth compartment 706 is equipped with a stirring assembly 5. The right side wall of the box body 701 is fixedly installed with an exhaust pipe 6 and a liquid outlet pipe. Chemical reaction liquid is added through the exhaust pipe 6. The power equipment of the stirring assembly 5 is started, so that the stirring rod of the stirring assembly 5 rotates and stirs, so that the metal substances and chemical reaction liquid in the flue gas are fully stirred and reacted. Then it is discharged from the exhaust pipe 6 and the used reaction liquid is discharged through the liquid outlet pipe.

[0038] The above completes a series of operations for the flue gas waste heat recovery heat exchanger. Any content not described in detail in this specification is existing technology known to those skilled in the art.

[0039] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flue gas waste heat recovery heat exchanger comprising a mounting box (7) and a cleaning mechanism (8), characterized in that: The mounting box (7) is provided with a smoke inlet pipe (1), a heat exchange pipe (2), a smoke outlet pipe (3), a cleaning mechanism (8), a second filter plate (9), a third filter plate (10), a conveying pipe (4), a stirring assembly (5) and an air outlet pipe (6) from left to right, one end of the smoke inlet pipe (1) is fixedly connected with the heat exchange pipe (2), one end of the heat exchange pipe (2) away from the smoke inlet pipe (1) is fixedly provided with the smoke outlet pipe (3), and the aperture of the second filter plate (9) is larger than that of the third filter plate (10).

2. A flue gas heat recovery exchanger according to claim 1, characterised in that: The mounting box (7) comprises a box body (701), a partition plate (702), a first compartment (703), a second compartment (704), a third compartment (705), a fourth compartment (706), a connecting frame (707), a connecting plate (708), a screw (709) and a sealing strip (710), and the rear side of the box body (701) is fixedly provided with the connecting frame (707).

3. A flue gas heat recovery exchanger according to claim 2, characterised in that: One end of the connecting frame (707) away from the box body (701) is fixedly connected with the connecting plate (708) through the screw (709), one end of the connecting plate (708) inside the box body (701) is provided with the sealing strip (710), and the inside of the box body (701) is fixedly provided with a plurality of partition plates (702).

4. A flue gas heat recovery exchanger according to claim 2, characterised in that: The partition plates (702) divide the box body (701) into the first compartment (703), the second compartment (704), the third compartment (705) and the fourth compartment (706), the first compartment (703) is provided with the heat exchange pipe (2), and the second compartment (704) is provided with the cleaning mechanism (8), the second filter plate (9) and the third filter plate (10).

5. A flue gas heat recovery exchanger according to claim 2, characterised in that: The third compartment (705) is provided with the conveying pipe (4), the fourth compartment (706) is provided with the stirring assembly (5), the left side wall of the box body (701) is fixedly provided with the smoke inlet pipe (1) and a liquid outlet pipe, the right side wall of the box body (701) is fixedly provided with the air outlet pipe (6) and a liquid outlet pipe, and the top end wall of the box body (701) is fixedly provided with a liquid inlet pipe.

6. A flue gas heat recovery exchanger according to claim 1, characterised in that: The cleaning mechanism (8) comprises a motor (801), a lead screw (802), a moving block (803), an auxiliary rod (804), a collection box (805), a first filter plate (806), an air suction fan (807), an air suction pipe (808) and a fixed pipe head (809), and the output top end of the motor (801) is fixedly connected with the lead screw (802).

7. A flue gas heat recovery exchanger according to claim 6, characterised in that: The lead screw (802) is rotatably connected in the first partition plate (702) on the left side, the outer side of the lead screw (802) is threadedly connected with the moving block (803), the moving block (803) is connected with the auxiliary rod (804) penetratingly through the front and rear ends, and the auxiliary rod (804) is fixedly installed in the first partition plate (702) on the left side.

8. A flue gas heat recovery exchanger according to claim 6, characterised in that: One end of the moving block (803) is fixedly provided with the collection box (805), the collection box (805) is fixedly provided with the air suction fan (807) and the first filter plate (806) inside, and the air suction fan (807) is located on the left side of the first filter plate (806).

9. A flue gas heat recovery exchanger according to claim 6, characterised in that: The suction end of the suction fan (807) is fixedly connected with a suction pipe (808), a fixed pipe head (809) is fixedly installed in the right side wall of the collecting box (805), and the fixed pipe head (809) is located on the left side of the second filter plate (9).

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