A flue gas treatment system tail gas heat energy recovery device

Abstract

The utility model discloses a flue gas treatment system tail gas heat energy recovery device relates to tail gas heat energy recovery equipment technical field, including recovery tank and the two first baffle of fixedly connected in the recovery tank inside, the two first baffle between intercommunication has circulating coil, the inside assembly of recovery tank has the second baffle, and the fixedly connected with gas guide seat between second baffle and first baffle, the utility model discloses through being installed between first baffle and second baffle gas guide seat, the inside installation of gas guide seat has gas guide vane, when the outside tail gas passes through the external connection pipe for tail gas and enters the recovery tank, and the tail gas passes through gas guide seat and drives gas guide impeller to rotate to drive connecting rod to rotate, make its connecting rod drive stirring vane to be in the recovery tank inside and rotate, and the water body in the recovery tank is stirred, thereby accelerates the speed of water body flow in the recovery tank, improves water body flowability, improves the uniformity of water body heat exchange.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas heat energy recovery equipment, specifically to an exhaust gas heat energy recovery device for a flue gas treatment system. Background Technology

[0002] Large amounts of exhaust gas are generated in industrial boilers, kilns, gas turbine / internal combustion engine generator sets, drying equipment, incinerators, marine engines, large diesel generators, or chemical production processes. To reduce the heat in the exhaust gas, mitigate the greenhouse effect, and recover the heat energy from the exhaust gas to avoid waste caused by direct heat emission, waste heat recovery is performed in flue gas treatment systems. There are various traditional waste heat recovery devices, among which submerged coil heat exchangers or flue gas waste heat recovery water tanks are the most commonly used recovery equipment. Their working principle is that high-temperature exhaust gas enters from the coil inlet, flows through the inside of the coil, and low-temperature water fills the tank, surrounding the coil. The heat of the high-temperature exhaust gas is transferred to the water surrounding the coil through the metal wall of the coil. After releasing heat, the exhaust gas is discharged from the coil outlet, and the temperature decreases. The water temperature rises after absorbing heat, thus achieving the purpose of waste heat recovery.

[0003] Although it can achieve the purpose of recovering waste heat from exhaust gas, there are still some problems in its use. For example, it lacks a structure to improve the flow of water. The water inside the recovery device mainly relies on natural convection, resulting in poor water flow. The water far from the coil heats up slowly, while the water near the coil overheats or even boils. The heat exchange efficiency of the water in different areas is different, resulting in water temperature stratification. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas heat recovery device for a flue gas treatment system to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: including a recycling bin and two first partitions fixed inside the recycling bin, with a circulation coil connected between the two first partitions; The recycling bin is equipped with a second partition, and an air guide seat is fixedly connected between the second partition and the first partition. An air guide impeller is provided inside the air guide seat. A connecting rod is rotatably connected between the two first partitions. One end of the connecting rod passes through the interior of the air guide seat and is fixedly sleeved with the air guide impeller. Multiple agitator blades are mounted on the surface of the connecting rod.

[0006] In a further embodiment, the top of the recycling bin is symmetrically connected to an external pipe, and both the top and bottom of the recycling bin are connected to a water pipe, with a valve installed on the surface of the water pipe.

[0007] In a further embodiment, the recycling bin is equipped with a third partition, and a mounting base is provided between the third partition and the second partition. The mounting base is equipped with a filter screen.

[0008] In a further embodiment, a sealing slot is provided on the front of the recycling bin, the sealing slot is connected to the inner cavity of the recycling bin, and a sealing plate fixedly connected to the mounting base is fixedly connected inside the sealing slot. The second partition and the third partition are each provided with a slot that slides and engages with the mounting base on opposite sides.

[0009] In a further embodiment, a waste discharge pipe is connected to the bottom of the recycling bin and directly below the third partition, and a valve is installed on the surface of the waste discharge pipe.

[0010] In a further embodiment, the bottom of the recycling bin is equipped with a support plate, and there are two support plates, with the two recycling bins installed symmetrically.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention features an air guide seat installed between the first and second partitions, with air guide blades installed inside. When external exhaust gas enters the recovery box through the external pipe for exhaust gas inlet, the exhaust gas drives the air guide impeller to rotate via the air guide seat, thereby driving the connecting rod to rotate. This causes the connecting rod to drive the stirring blades to rotate inside the recovery box, stirring the water inside the recovery box, thereby accelerating the flow rate of the water inside the recovery box, improving the water fluidity, and enhancing the uniformity of heat exchange in the water. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a partial structural cross-sectional view of an embodiment of the present utility model; Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the air guide seat structure according to an embodiment of the present utility model; Figure 5 This is a cross-sectional view of the recycling bin structure according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the recycling bin structure according to an embodiment of the present utility model.

[0013] In the diagram: 1. Recycling bin; 2. First partition; 3. Circulation coil; 4. Second partition; 5. Air guide seat; 6. Air guide impeller; 7. Connecting rod; 8. Agitator blade; 9. External pipe; 10. Water pipe; 11. Third partition; 12. Mounting base; 13. Filter screen; 14. Sealing slot; 15. Sealing plate; 16. Slot; 17. Waste discharge pipe; 18. Support plate. Detailed Implementation

[0014] 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.

[0015] This embodiment discloses a flue gas heat recovery device for a flue gas treatment system, including a recovery box 1 and two first partitions 2 fixed inside the recovery box 1. A circulation coil 3 connects the two first partitions 2. Two support plates 18 are mounted on the bottom of the recovery box 1, and the two recovery boxes 1 are symmetrically installed. Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown in this application, the recovery box 1 is the outer shell of the exhaust gas heat energy recovery device. There are two first partitions 2, both of which are installed inside the recovery box 1. The two first partitions 2 divide the interior of the recovery box 1 into a chamber for storing water. The circulation coil 3 is designed inside the recovery box 1, and its two ends are respectively installed on the two first partitions 2. The circulation coil 3 is used to transport external exhaust gas. When the external exhaust gas enters the water storage chamber between the two first partitions 2 through the circulation coil 3, the water and exhaust gas can exchange heat. The support plate 18 is designed at both ends of the bottom of the recovery box 1 for supporting and fixing the recovery box 1.

[0016] More specifically, the interior of the recycling bin 1 is equipped with a second partition 4. An air guide seat 5 is fixedly connected between the second partition 4 and the first partition 2. An air guide impeller 6 is installed inside the air guide seat 5. A connecting rod 7 is rotatably connected between the two first partitions 2. One end of the connecting rod 7 penetrates into the interior of the air guide seat 5 and is fixedly sleeved with the air guide impeller 6. Multiple agitator blades 8 are mounted on the surface of the connecting rod 7, such as… Figure 2 , Figure 3 and Figure 4As shown in this application, the second partition 4 is installed inside the recycling tank 1, forming a chamber between the second partition 4 and the first partition 2. After passing through this chamber, the exhaust gas enters through one end of the circulation coil 3. The air guide seat 5 is installed in this chamber. When the exhaust gas passes through this chamber, it enters through the air inlet at the top of the air guide seat 5 and exits from the air outlet of the air guide seat 5. The connecting rod 7 is rotatably installed between the two first partitions 2, and the connecting rod 7 is located at the center of the circulation coil 3. One end of the connecting rod 7 penetrates into the interior of the air guide seat 5 and is equipped with an air guide impeller 6. When the exhaust gas passes through the interior of the air guide seat 5, it can drive the air guide impeller 6 to rotate. When the air guide impeller 6 rotates, it can drive the connecting rod 7 to rotate. The stirring blade 8 is installed on the surface of the connecting rod 7. Therefore, the rotation of the connecting rod 7 will drive the stirring blade 8 to rotate inside the recycling tank 1 around the connecting rod 7, thereby agitating the water inside the recycling tank 1, increasing the flow rate of the water inside the recycling tank 1, improving the fluidity of the water, and improving the uniformity of the heat exchange of the water.

[0017] Furthermore, the recycling bin 1 is internally equipped with a third partition 11, and a mounting base 12 is provided between the third partition 11 and the second partition 4. A filter screen 13 is installed inside the mounting base 12. A sealing slot 14 is provided on the front of the recycling bin 1, communicating with the inner cavity of the recycling bin 1. A sealing plate 15, which is fixedly connected to the mounting base 12, is fixedly connected inside the sealing slot 14. On opposite sides of the second partition 4 and the third partition 11, there are slots 16 that slide and engage with the mounting base 12. Figure 2 , Figure 5 and Figure 6 As shown in this application, the third partition 11 is designed inside the recycling bin 1, located on the side of the second partition 4 away from the first partition 2. A slot 16 is provided on the opposite side of the second partition 4 and the third partition 11. The slot 16 is used for the sliding engagement of the mounting base 12, which is engaged between the two slots 16. The filter screen 13 is installed inside the mounting base 12 to filter dust and impurities in the exhaust gas. The filter screen 13 is preferably made of ceramic material with a mesh size between 50 and 200. When external gas enters the recycling bin 1, it passes through the chamber between the third partition 11 and the second partition 4 and then enters the chamber between the first partition 2 and the second partition 4. When exhaust gas enters the chamber between the first partition 2 and the second partition 4 from the chamber of the second partition 4 and the third partition 11, the exhaust gas will be filtered by the filter screen 13 to remove impurities and prevent them from adhering to the inner wall of the circulation coil 3. The sealing slot 14 is opened on the front of the recycling box 1 and communicates with the internal chamber of the recycling box 1. The sealing plate 15 is fixed in the sealing slot 14 by screws. The sealing plate 15 and the mounting base 12 are fixedly connected. The sealing plate 15 can seal the sealing slot 14. When the sealing plate 15 is removed, the mounting base 12 can be pulled out from the inside of the recycling box 1, which is convenient for the staff to clean the filter screen 13.

[0018] Preferably, the top of the recycling bin 1 is symmetrically connected to an external pipe 9, and both the top and bottom of the recycling bin 1 are connected to a water pipe 10, with a valve installed on the surface of the water pipe 10. The bottom of the recycling bin 1, directly below the third partition 11, is connected to a waste discharge pipe 17, with a valve installed on the surface of the waste discharge pipe 17. Figure 1 and Figure 2 As shown in the figure, in this application, there are two external pipes 9, which are installed at the top and bottom of the recycling box 1 respectively. The two external pipes 9 are used for the entry of external exhaust gas and the discharge of exhaust gas after heat exchange. Two water pipes 10 are installed at the top and bottom of the recycling box 1 respectively. The water pipe 10 at the top is used for filling water into the recycling box 1, and the water pipe 10 at the bottom of the recycling box 1 is used for the discharge of water after heat exchange, providing it for external use. The waste discharge pipe 17 is designed at the bottom of the recycling box 1 for the discharge of dust and impurities filtered by the filter screen 13 inside the mounting base 12.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas heat recovery device for a flue gas treatment system, comprising a recovery box (1) and two first partitions (2) fixed inside the recovery box (1), characterized in that: A circulating coil (3) is connected between the two first partitions (2); The recycling bin (1) is equipped with a second partition (4) inside. A guide seat (5) is fixed between the second partition (4) and the first partition (2). A guide impeller (6) is provided inside the guide seat (5). A connecting rod (7) is rotatably connected between the two first partitions (2). One end of the connecting rod (7) passes through the interior of the guide seat (5) and is fixedly sleeved with the guide impeller (6). A plurality of stirring blades (8) are assembled on the surface of the connecting rod (7).

2. The flue gas heat recovery device for a flue gas treatment system according to claim 1, characterized in that: The top of the recycling bin (1) is symmetrically connected to an external pipe (9), and the top and bottom of the recycling bin (1) are both connected to a water pipe (10), and a valve is installed on the surface of the water pipe (10).

3. The flue gas heat recovery device for a flue gas treatment system according to claim 1, characterized in that: The recycling bin (1) is equipped with a third partition (11), and a mounting base (12) is provided between the third partition (11) and the second partition (4). The mounting base (12) is equipped with a filter screen (13).

4. The flue gas heat recovery device for a flue gas treatment system according to claim 1, characterized in that: The front of the recycling bin (1) is provided with a sealing slot (14), which is connected to the inner cavity of the recycling bin (1). A sealing plate (15) is fixedly connected to the mounting base (12) inside the sealing slot (14). The second partition (4) and the third partition (11) are each provided with a slot (16) that is slidably engaged with the mounting base (12) on the opposite side.

5. The flue gas heat recovery device for a flue gas treatment system according to claim 1, characterized in that: The bottom of the recycling bin (1) and directly below the third partition (11) is connected to a waste discharge pipe (17), and a valve is installed on the surface of the waste discharge pipe (17).

6. The flue gas heat recovery device for a flue gas treatment system according to claim 1, characterized in that: The bottom of the recycling bin (1) is equipped with a support plate (18), and there are two support plates (18), and the two recycling bins (1) are installed symmetrically.

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