Integrated flue gas cooling and waste heat recovery device

Abstract

The utility model relates to a waste heat recovery device technical field discloses a kind of integrated flue gas cooling and waste heat recovery device, including flue gas cooling box, flue gas cooling box side wall lower part is equipped with air inlet pipe, flue gas cooling box top is equipped with exhaust pipe;Flue gas cooling box side is equipped with multiple groups of box mouth, box mouth outside is rotatably installed with box door, box door inboard is equipped with connecting plate, connecting plate inboard upper portion is equipped with transverse plate, and multiple exhaust ports are equipped in transverse plate and located filter dust frame inboard;Multiple groups of U-shaped water pipes are installed in transverse plate lower side, and water delivery assembly connected with U-shaped water pipe is installed in transverse plate upper side.The utility model has the advantages compared with prior art: by transverse plate, the inside of flue gas cooling box is separated into multiple cooling spaces, the flue gas is multistage cooling, water delivery assembly is connected with the heat extraction equipment outside by hose, the U-shaped water pipe is turned out from flue gas cooling box by opening box door, and the U-shaped water pipe is cleaned, and connecting pipeline does not need to be disassembled.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat recovery devices, specifically an integrated flue gas cooling and waste heat recovery device. Background Technology

[0002] Gas-fired boilers typically use natural gas as fuel, the main component of which is methane. Combustion produces flue gas, and a significant portion of this flue gas heat loss is sensible heat. Small and medium-sized gas-fired boilers usually lack heat exchange equipment at the tail end, and their flue gas temperature is generally 170-210℃, indicating substantial potential for waste heat recovery. Existing boiler flue gas waste heat recovery devices mostly involve directly connecting gas pipes in series between the boiler exhaust port and the chimney outlet for flue gas waste heat recovery. These devices generally use cold water to recover waste heat from the boiler flue gas, and the cooling water or cooling air pipes are directly connected to devices using hot water or hot air. When the cooling water tank of the boiler flue gas waste heat recovery device needs cleaning, these pipes must be disassembled, causing significant inconvenience for maintenance.

[0003] To address the aforementioned technical problems, this application proposes an integrated flue gas cooling and waste heat recovery device. Utility Model Content

[0004] I. Technical problems to be solved

[0005] The technical problem this invention aims to solve is that cooling water pipes or cooling air pipes are directly connected to devices that use hot water or hot air. When the cooling water tank of the boiler flue gas waste heat recovery unit needs to be cleaned, these pipes must be removed, which brings great inconvenience to the maintenance of the cooling water tank.

[0006] II. Technical Solution

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: an integrated flue gas cooling and waste heat recovery device, including a flue gas cooling box, an air inlet pipe installed on the lower part of the side wall of the flue gas cooling box, and an exhaust pipe installed on the top of the flue gas cooling box;

[0008] The flue gas cooling box has multiple sets of openings on one side. A box door is rotatably installed on the outside of the opening. A connecting plate is installed on the inside of the box door. A horizontal plate is installed on the upper part of the inner side of the connecting plate. A dust filter frame is fixedly installed on the lower side of the horizontal plate. Multiple exhaust ports are provided on the horizontal plate and inside the dust filter frame.

[0009] Multiple sets of U-shaped water pipes are installed on the lower side of the horizontal plate. These multiple sets of U-shaped water pipes are located inside the dust filter frame. A water conveying assembly connected to the U-shaped water pipes is installed on the upper side of the horizontal plate. The water conveying assembly continuously delivers cooling water to the multiple sets of U-shaped water pipes.

[0010] As an improvement, the water supply assembly includes four sets of connecting water pipes. An inlet pipe and a drain pipe are respectively installed on two adjacent sets of connecting water pipes. A guide pipe is connected between the ends of the other two sets of connecting water pipes. The two ends of the U-shaped water pipe are respectively connected to two sets of connecting water pipes spaced apart.

[0011] As an improvement, the inner and outer sides of the dust filter frame are covered with a protective frame, which is fixedly connected to the lower side of the cross plate by multiple sets of bolts.

[0012] As an improvement, the flue gas cooling box is a cylindrical structure. The outer wall of the flue gas cooling box and the outer side of multiple sets of box openings are provided with arc-shaped limiting grooves. The inner wall of the box door is sealed and fitted to the bottom of the arc-shaped limiting grooves, and is fixedly connected to the bottom of the arc-shaped limiting grooves by a locking device.

[0013] As an improvement, the connecting plate extends to the inside of the box opening and fits against the side wall of the box opening.

[0014] As an improvement, a sealing gasket is installed on the outer side of the cross plate, and the sealing gasket is in sealed contact with the inner wall of the flue gas cooling box. The sealing gasket is made of fire-resistant sealant material.

[0015] III. Beneficial Effects

[0016] The advantages of this utility model compared with the prior art are as follows: When flue gas enters the flue gas cooling box, the interior of the flue gas cooling box is divided into multiple cooling spaces by a horizontal plate. Each cooling space exchanges heat with the flue gas through multiple sets of U-shaped water pipes, thereby achieving multi-stage cooling of the flue gas and improving the recovery effect of waste heat from the flue gas. The water supply component is connected to the external heat recovery equipment through a flexible hose. The U-shaped water pipes can be turned out of the flue gas cooling box by opening the box door for cleaning. When cleaning the U-shaped water pipes, it is not necessary to disassemble the connecting pipes, which facilitates the maintenance of the flue gas cooling box. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the inner side installation structure of the box door of an integrated flue gas cooling and waste heat recovery device according to this utility model.

[0018] Figure 2 This is a schematic diagram of the horizontal plate mounting structure of an integrated flue gas cooling and waste heat recovery device according to this utility model.

[0019] Figure 3 This is a schematic diagram of the front structure of an integrated flue gas cooling and waste heat recovery device according to this utility model.

[0020] Figure 4 This is a schematic diagram of the rear structure of an integrated flue gas cooling and waste heat recovery device according to this utility model.

[0021] Figure 5This is a schematic diagram of the flue gas cooling box structure of an integrated flue gas cooling and waste heat recovery device according to this utility model.

[0022] As shown in the figure: 1. Flue gas cooling box; 2. Inlet pipe; 3. Exhaust pipe; 4. Box opening; 5. Arc-shaped limiting groove; 6. Box door; 7. Connecting plate; 8. Horizontal plate; 9. Dust filter frame; 10. Exhaust port; 11. Connecting water pipe; 12. U-shaped water pipe; 13. Water guide pipe; 14. Water inlet pipe; 15. Drain pipe; 16. Sealing gasket; 17. Protective frame. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] As attached Figure 4 As shown, an integrated flue gas cooling and waste heat recovery device includes a flue gas cooling box 1. An air inlet pipe 2 is installed on the lower part of the side wall of the flue gas cooling box 1, which is connected to the flue gas exhaust pipe of the gas boiler. An exhaust pipe 3 is installed on the top of the flue gas cooling box 1, which is connected to other flue gas treatment equipment.

[0026] As attached Figure 1 and attached Figure 5 As shown, the flue gas cooling box 1 has multiple sets of openings 4 on one side. A door 6 is rotatably installed on the outside of the opening 4. The flue gas cooling box 1 is a cylindrical structure. An arc-shaped limiting groove 5 is provided on the outer wall of the flue gas cooling box 1 and outside the multiple sets of openings 4. The inner wall of the door 6 is sealed and fitted to the bottom of the arc-shaped limiting groove 5, and is fixedly connected to the bottom of the arc-shaped limiting groove 5 by a locking device to achieve the sealed installation of the door 6 and prevent flue gas leakage. A connecting plate 7 is installed on the inner side of the door 6. The connecting plate 7 passes through to the inner side of the opening 4 and fits against the side wall of the opening 4. A horizontal plate 8 is installed on the upper part of the inner side of the connecting plate 7. A sealing gasket 16 is installed on the outer side of the horizontal plate 8. The sealing gasket 16 is in sealed contact with the inner wall of the flue gas cooling box 1. The sealing gasket 16 is made of fire-resistant sealant material to prevent the high temperature of the flue gas from damaging the sealing gasket, affecting the sealing effect, causing the flue gas to leak upward, and dividing the inside of the flue gas cooling box 1 into multiple cooling chambers.

[0027] As attached Figure 1 Appendix Figure 2 and attached Figure 3As shown, multiple sets of U-shaped water pipes 12 are installed on the lower side of the horizontal plate 8, and a water conveying assembly connected to the U-shaped water pipes 12 is installed on the upper side of the horizontal plate 8. The water conveying assembly includes four sets of connecting water pipes 11. An inlet pipe 14 and a drain pipe 15 are respectively installed on two adjacent sets of connecting water pipes 11. The inlet pipe 14 and the drain pipe 15 are respectively sealed and pass through the box door 6, and are connected to the cooling water supply device and hot water equipment through flexible hoses. A water guide pipe 13 is connected between the ends of the other two sets of connecting water pipes 11. The two ends of the U-shaped water pipes 12 are respectively connected to two sets of connecting water pipes 11 at intervals, so as to realize the connection of multiple sets of U-shaped water pipes 12 and continuously transport water in multiple sets of U-shaped water pipes 12.

[0028] Another connection method: the uppermost water inlet pipe 14 is connected to the cooling water supply device through a hose, the upper set of drain pipes 15 is connected to the lower set of water inlet pipes 14 through a hose, and the last set of drain pipes is connected to the hot water equipment through a hose, forming a series structure from top to bottom, which heats the cooling water step by step from top to bottom, ensuring that the discharged water temperature is high. When cleaning the inside of the flue gas cooling box 1, this structure allows multiple sets of box doors 6 to be opened and cleaned at the same time, or the hoses to be disassembled and cleaned separately.

[0029] Example 2

[0030] Based on Example 1, in order to ensure that the U-shaped water pipe 12 has a better heat exchange effect, as shown in the attached... Figure 1 As shown, a dust filter frame 9 is fixedly installed on the lower side of the horizontal plate 8. The dust filter frame 9 is covered with a protective frame 17 on its inner and outer sides. The protective frame 17 is fixedly connected to the lower side of the horizontal plate 8 by multiple sets of bolts. Multiple sets of exhaust ports 10 are provided on the horizontal plate 8 and located inside the dust filter frame 9. Multiple sets of U-shaped water pipes 12 are located inside the dust filter frame 9. The dust filter frame 9 filters the flue gas to prevent a large amount of dust particles in the flue gas from adhering to the outside of the U-shaped water pipes 12 and affecting the heat exchange effect of the U-shaped water pipes 12.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] 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.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An integrated flue gas cooling and waste heat recovery device, comprising a flue gas cooling box (1), wherein an air inlet pipe (2) is installed on the lower part of the side wall of the flue gas cooling box (1), and an exhaust pipe (3) is installed on the top of the flue gas cooling box (1), characterized in that: The flue gas cooling box (1) has multiple sets of box openings (4) on one side. A box door (6) is rotatably installed on the outside of the box opening (4). A connecting plate (7) is installed on the inside of the box door (6). A horizontal plate (8) is installed on the upper part of the inner side of the connecting plate (7). A dust filter frame (9) is fixedly installed on the lower side of the horizontal plate (8). Multiple sets of exhaust ports (10) are provided on the horizontal plate (8) and inside the dust filter frame (9). Multiple sets of U-shaped water pipes (12) are installed on the lower side of the horizontal plate (8). The multiple sets of U-shaped water pipes (12) are located inside the dust filter frame (9). A water conveying assembly connected to the U-shaped water pipes (12) is installed on the upper side of the horizontal plate (8). The cooling water inside the multiple sets of U-shaped water pipes (12) is continuously conveyed through the water conveying assembly.

2. The integrated flue gas cooling and waste heat recovery device according to claim 1, characterized in that: The water supply assembly includes four sets of connecting water pipes (11). Two adjacent sets of connecting water pipes (11) are respectively equipped with an inlet pipe (14) and a drain pipe (15). The ends of the other two sets of connecting water pipes (11) are connected by a water guide pipe (13). The two ends of the U-shaped water pipe (12) are respectively connected to the two sets of connecting water pipes (11) spaced apart.

3. The integrated flue gas cooling and waste heat recovery device according to claim 1, characterized in that: The dust filter frame (9) is covered with a protective frame (17) on both the inner and outer sides. The protective frame (17) is fixedly connected to the lower side of the horizontal plate (8) by multiple sets of bolts.

4. The integrated flue gas cooling and waste heat recovery device according to claim 1, characterized in that: The flue gas cooling box (1) is a cylindrical structure. The outer wall of the flue gas cooling box (1) and the outer side of the multiple sets of box openings (4) are provided with arc-shaped limiting grooves (5). The inner wall of the box door (6) is sealed and fitted to the bottom of the arc-shaped limiting grooves (5), and is fixedly connected to the bottom of the arc-shaped limiting grooves (5) by a lock.

5. The integrated flue gas cooling and waste heat recovery device according to claim 4, characterized in that: The connecting plate (7) extends to the inside of the box opening (4) and fits against the side wall of the box opening (4).

6. The integrated flue gas cooling and waste heat recovery device according to claim 1, characterized in that: A sealing gasket (16) is installed on the outside of the horizontal plate (8). The sealing gasket (16) is in sealed contact with the inner wall of the flue gas cooling box (1). The sealing gasket (16) is made of fire-resistant sealant material.

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