A flue gas waste heat recovery device for thermal power plants

Abstract

The utility model belongs to the technical field of waste heat recovery, especially a thermal power plant flue gas waste heat recovery device, including the casing, the both ends symmetry of casing are connected with square groove, the inside of casing is provided with the heat absorption pipe, the inside of square groove is provided with the filter assembly, and the filter assembly is used for screening the particulate matter that flue gas carries, the square groove side is provided with the strip groove, the inside of strip groove is provided with the adjusting assembly, and adjusting assembly is used for adjusting the filter assembly position and is dismantled. The utility model discloses through the filter screen and threaded shank of installation, the particulate matter that flue gas carries is conveniently adsorbed and removed, when flue gas flows into the inside of square groove, flue gas will flow through the filter screen, and then the filter screen will intercept and adsorb the impurity particulate matter that flue gas carries, realize the purpose of purifying flue gas, can avoid flue gas carrying particle adsorption on the heat absorption pipe, influence the heat exchange effect of heat absorption pipe.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology, specifically relating to a waste heat recovery device for flue gas from a thermal power plant. Background Technology

[0002] Waste heat recovery devices in thermal power plants are important energy-saving equipment designed to recover residual heat energy from the flue gas emitted during power generation, thereby improving overall thermal efficiency. By exchanging heat with the flue gas, the temperature of the flue gas is reduced. During the flue gas cooling process, the recovered heat energy can be used for multiple purposes: heating boiler feedwater to reduce fuel consumption, providing hot water to meet the heat energy needs of the plant or external users. By effectively utilizing the waste heat in the flue gas, the energy efficiency of the power generation system can be significantly improved, and fuel consumption and emissions can be reduced, which is beneficial to both environmental protection and economic benefits.

[0003] According to the publicly available announcement (CN205048466U), a flue gas moisture and waste heat recovery device based on a hollow micro-nano porous ceramic membrane is disclosed. This technology is described as "applied to the recovery of moisture and waste heat from flue gas before it enters the chimney of a thermal power plant, mainly consisting of the following systems: a hollow micro-nano porous ceramic membrane module system, a water supply system (mainly including a water tank and a water pump), and an auxiliary system (mainly including valves, pipes, and sensors). First, the water supply system fills the hollow micro-nano porous ceramic membrane tube with cooling water. The water pump is then turned on to create a slight negative pressure inside the membrane. When the flue gas passes through the membrane module, a pressure difference is created across the membrane tube. Water vapor in the flue gas condenses in the nanopores on the surface of the ceramic membrane due to capillary condensation and enters the membrane tube through the pressure difference, mixing with the cooling water to achieve moisture recovery. Simultaneously, heat transfer occurs across the membrane tube, achieving waste heat recovery. This device has good self-sustaining properties, is highly efficient and environmentally friendly, and can be used to recover large amounts of moisture and waste heat resources from flue gas, reducing the operating costs of thermal power plants."

[0004] However, this device is not convenient for intercepting and removing particulate matter carried in flue gas during use. When particulate matter enters the heat exchanger, it is easily adsorbed on the heat absorption tube. As the adsorbed impurities gradually increase, the heat exchange efficiency is easily affected.

[0005] To address the aforementioned issues, this application proposes a waste heat recovery device for flue gas from thermal power plants. Utility Model Content

[0006] To address the problems mentioned in the background section, this invention provides a waste heat recovery device for flue gas in thermal power plants, which features the ability to adsorb and remove particulate matter carried in the flue gas.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for flue gas in a thermal power plant, comprising a shell, with square grooves symmetrically connected to both ends of the shell, and a heat absorption tube disposed inside the shell;

[0008] The square groove is equipped with a filter assembly, which is used to screen the particulate matter carried by the flue gas.

[0009] The square groove has a strip groove on its side, and an adjustment component is provided inside the strip groove. The adjustment component is used to adjust and disassemble the position of the filter component.

[0010] As a preferred embodiment of the waste heat recovery device for flue gas in thermal power plants according to this utility model, the shell is provided with a water inlet pipe, one end of which is connected to the input end of the heat absorption pipe, and the shell is provided with a drain pipe, one end of which is connected to the output end of the heat absorption pipe. Both the heat absorption pipe and the drain pipe are equipped with sealing caps.

[0011] As a preferred embodiment of the waste heat recovery device for flue gas in thermal power plants according to this utility model, the top of the square trough is provided with a through trough.

[0012] As a preferred embodiment of the waste heat recovery device for flue gas in a thermal power plant according to this utility model, the filter assembly includes a square frame and a filter screen. The square frame is horizontally arranged inside the square groove through a through groove, and the filter screen is fixedly installed inside the square frame.

[0013] As a preferred embodiment of the waste heat recovery device for flue gas in thermal power plants according to this utility model, the square trough is provided with a sliding groove on its side.

[0014] As a preferred embodiment of the waste heat recovery device for flue gas in thermal power plants according to this utility model, the adjustment component includes a drive motor, a threaded screw, a slider, and a connecting block. The drive motor is fixedly installed at the bottom of the strip groove. The threaded screw is rotatably disposed inside the strip groove. The slider is disposed inside the strip groove, and the threaded screw is threadedly connected to the slider. One end of the connecting block passes through the groove and is fixedly connected to the square frame, and the other end of the connecting block is fixedly connected to the slider.

[0015] As a preferred embodiment of the waste heat recovery device for flue gas in thermal power plants according to this utility model, a guide rod is fixedly installed inside the strip groove, and the guide rod passes through the slider.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention utilizes an installed filter screen and threaded screw to facilitate the adsorption and removal of particulate matter carried by flue gas. When flue gas flows into the square groove, it passes through the filter screen, which intercepts and adsorbs the impurities carried by the flue gas, thus purifying the flue gas. This prevents particles from adsorbing onto the heat absorption tube and affecting its heat exchange efficiency. When removing filtered dust and impurities, the drive motor rotates the threaded screw, causing the slider to move. Through the connecting block, the slider moves the square frame, which then moves out of the square groove via the through slot, allowing the filter screen to be disassembled for easy cleaning and replacement. This improves cleaning efficiency and achieves the goal of filtering and removing impurities carried in the flue gas, enhancing its practicality. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate 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, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the heat absorption tube in this utility model;

[0021] Figure 3 This is a schematic diagram of the slide groove in this utility model;

[0022] Figure 4 This is a schematic diagram of the square frame structure in this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the strip groove in this utility model.

[0024] In the diagram: 1. Shell; 2. Heat absorption tube; 3. Water inlet pipe; 4. Drain pipe; 5. Sealing cap; 6. Square groove; 7. Through groove; 8. Square frame; 9. Filter screen; 10. Slide groove; 11. Strip groove; 12. Drive motor; 13. Threaded screw; 14. Slider; 15. Connecting block; 16. Guide rod. Detailed Implementation

[0025] 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.

[0026] like Figures 1 to 5As shown: A waste heat recovery device for flue gas in a thermal power plant includes a shell 1, with square grooves 6 symmetrically connected to both ends of the shell 1. A heat absorption pipe 2 is installed inside the shell 1. A filter assembly is installed inside the square grooves 6 to screen particulate matter carried by the flue gas. A strip groove 11 is installed on the side of the square groove 6. An adjustment assembly is installed inside the strip groove 11 and is used to adjust and disassemble the position of the filter assembly.

[0027] In this implementation plan: When using a waste heat recovery device for flue gas from a thermal power plant to recover heat from emitted flue gas, the square trough 6 is connected to the discharge pipe. After the flue gas flows through the filter assembly, it enters the interior of the housing 1. This prevents particles carried by the flue gas from adsorbing onto the heat absorption tube 2, thus affecting the heat exchange effect of the heat absorption tube 2. When water flows inside the heat absorption tube 2, it can adsorb the heat from the flue gas for heat exchange (this is existing technology). After the water adsorbs heat, it flows to an external storage container for storage, thereby achieving the purpose of heat recovery and reducing resource waste. If the filter assembly adsorbs too many impurities, it can easily affect the flow of flue gas. When cleaning the filter assembly, the position of the filter assembly can be adjusted by adjusting the movement of the assembly, thereby moving the filter assembly to the outside, which facilitates disassembly and cleaning of the filter assembly and improves cleaning efficiency.

[0028] like Figure 1 and Figure 2 As shown: In an optional embodiment, a water inlet pipe 3 is provided on the housing 1, and one end of the water inlet pipe 3 is connected to the input end of the heat absorption pipe 2. A drain pipe 4 is provided on the housing 1, and one end of the drain pipe 4 is connected to the output end of the heat absorption pipe 2. Both the heat absorption pipe 2 and the drain pipe 4 are equipped with sealing caps 5.

[0029] In this embodiment: the water inlet pipe 3 is connected to the external heat absorption source equipment, and the drain pipe 4 is connected to the external storage container. After the water source is transported by the conveying equipment into the heat absorption pipe 2, it comes into contact with the flue gas entering the shell 1 and can absorb and carry the heat carried by the flue gas. The water source that absorbs the heat flows into the storage container through the drain pipe 4 for storage, thereby achieving the goal of heat recovery.

[0030] like Figure 1 As shown: In an optional embodiment, the top of the square groove 6 is provided with a through groove 7.

[0031] In this embodiment, the through slot 7 facilitates the movement of the square frame 8 into and out of the square slot 6.

[0032] like Figure 3 and Figure 4As shown: In an optional embodiment, the filter assembly includes a square frame 8 and a filter screen 9. The square frame 8 is horizontally disposed inside the square groove 6 through the through groove 7, and the filter screen 9 is fixedly installed inside the square frame 8. A sliding groove 10 is provided on the side of the square groove 6.

[0033] In this embodiment: the square frame 8 provides installation space for the filter screen 9, so that the filter screen 9 is placed inside the square groove 6. When the flue gas enters the square groove 6 and flows, the flue gas will flow through the filter screen 9, and the filter screen 9 will intercept and adsorb the impurities and particles carried by the flue gas, thereby achieving the purpose of purifying the flue gas. The filter screen 9 is fixedly installed inside the square frame 8 by a buckle and is detachable.

[0034] like Figure 5 As shown: In an optional embodiment, the adjustment assembly includes a drive motor 12, a threaded screw 13, a slider 14, and a connecting block 15. The drive motor 12 is fixedly installed at the bottom end of the strip groove 11. The threaded screw 13 is rotatably disposed inside the strip groove 11. The slider 14 is disposed inside the strip groove 11, and the threaded screw 13 is threadedly connected to the slider 14. One end of the connecting block 15 passes through the slide groove 10 and is fixedly connected to the square frame 8. The other end of the connecting block 15 is fixedly connected to the slider 14.

[0035] In this embodiment: when disassembling and cleaning the filter assembly, the drive motor 12 will drive the threaded screw 13 to rotate, which will cause the slider 14 to move. The movement of the slider 14 will drive the square frame 8 to move through the connecting block 15, and then through the through slot 7, causing the square frame 8 to move out of the square slot 6, so that the filter screen 9 can be disassembled, thereby achieving the purpose of easy cleaning and replacement.

[0036] like Figure 5 As shown: In an optional embodiment, a guide rod 16 is fixedly installed inside the strip groove 11, and the guide rod 16 passes through the slider 14.

[0037] In this embodiment: when the slider 14 moves, the guide rod 16 is used to guide the slider 14 so that the slider 14 moves smoothly.

[0038] The working principle and usage process of this utility model are as follows: When using a waste heat recovery device for flue gas from a thermal power plant to recover heat from the emitted flue gas, the square trough 6 is connected to the flue gas discharge pipe. As the flue gas flows into the square trough 6, it passes through the filter screen 9, which intercepts and adsorbs impurities carried by the flue gas, thus purifying the flue gas. This prevents particles carried by the flue gas from adsorbing onto the heat absorption tube 2, which would affect the heat exchange effect of the heat absorption tube 2. When water flows inside the heat absorption tube 2, it can adsorb heat from the flue gas for heat exchange. After the water source absorbs heat, it flows to an external storage container for storage, thereby achieving the purpose of heat recovery and reducing resource waste. If the filter component absorbs too many impurities, it will easily affect the flow of flue gas. When cleaning the filter component, the drive motor 12 will drive the threaded screw 13 to rotate, which will cause the slider 14 to move. The movement of the slider 14 will drive the square frame 8 to move through the connecting block 15, and then through the through groove 7, the square frame 8 will move out of the square groove 6, so that the filter screen 9 can be disassembled, thereby achieving the purpose of easy cleaning and replacement and improving cleaning efficiency.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A waste heat recovery device for flue gas from a thermal power plant, comprising a shell (1), characterized in that: The shell (1) is symmetrically connected to square grooves (6) at both ends, and a heat-absorbing tube (2) is provided inside the shell (1). The square groove (6) is equipped with a filter assembly, which is used to screen the particulate matter carried by the flue gas. The square groove (6) has a strip groove (11) on its side. An adjustment component is provided inside the strip groove (11), and the adjustment component is used to adjust and disassemble the filter component. The filter assembly includes a square frame (8) and a filter screen (9). The square frame (8) passes through the through slot (7) and is horizontally arranged inside the square slot (6). The filter screen (9) is fixedly installed inside the square frame (8).

2. The waste heat recovery device for flue gas in a thermal power plant according to claim 1, characterized in that: The housing (1) is provided with a water inlet pipe (3), and one end of the water inlet pipe (3) is connected to the input end of the heat absorption pipe (2). The housing (1) is provided with a drain pipe (4), and one end of the drain pipe (4) is connected to the output end of the heat absorption pipe (2). Both the heat absorption pipe (2) and the drain pipe (4) are equipped with sealing caps (5).

3. The waste heat recovery device for flue gas in a thermal power plant according to claim 1, characterized in that: A through groove (7) is provided at the top of the square groove (6).

4. The waste heat recovery device for flue gas in a thermal power plant according to claim 3, characterized in that: The square groove (6) has a sliding groove (10) on its side.

5. The waste heat recovery device for flue gas in a thermal power plant according to claim 1, characterized in that: The adjustment assembly includes a drive motor (12), a threaded screw (13), a slider (14), and a connecting block (15). The drive motor (12) is fixedly installed at the bottom of the strip groove (11). The threaded screw (13) is rotatably disposed inside the strip groove (11). The slider (14) is disposed inside the strip groove (11), and the threaded screw (13) is threadedly connected to the slider (14). One end of the connecting block (15) passes through the slide groove (10) and is fixedly connected to the square frame (8). The other end of the connecting block (15) is fixedly connected to the slider (14).

6. The waste heat recovery device for flue gas in a thermal power plant according to claim 5, characterized in that: A guide rod (16) is fixedly installed inside the strip groove (11), and the guide rod (16) passes through the slider (14).

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