Flue gas heat exchanger cleaning structure

Abstract

The utility model discloses a flue gas heat exchanger cleaning structure, comprising a flue gas heat exchanger body, the side wall of the flue gas heat exchanger body is symmetrically fixedly connected with a flue gas pipe, a square opening is arranged at the center of the upper surface of the flue gas heat exchanger body, a replacement structure is installed at the square opening of the upper surface of the flue gas heat exchanger body, and a tubular heat exchange element is installed at the center of the replacement structure. When a certain amount of condensed water is accumulated, the drainage structure is controlled to discharge, and the accumulated condensed water can be effectively discharged to prevent the accumulated water from damaging the heat exchanger. When cleaning, the tubular heat exchange element can be removed through the replacement structure, and at the same time, the tubular heat exchange element can be more easily cleaned and replaced, and it is convenient to replace during maintenance. The split design makes it more convenient to repair and replace the tubular heat exchange element, reduces the maintenance time, ensures the normal operation of the flue gas heat exchanger, and improves the maintenance and cleaning efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas heat exchangers, and specifically relates to a flue gas heat exchanger cleaning structure. Background Art

[0002] Flue gas heat exchanger is a large-scale equipment used for industrial flue gas treatment, mainly used for heat transfer and gas exchange. Thermal power plants, waste incineration plants, etc. will produce a large amount of high-temperature flue gas during the power generation process. Flue gas heat exchanger can effectively transfer the heat of flue gas to another medium, such as cooling water or air, thereby reducing the temperature of flue gas and reducing thermal pollution to the environment. And recover heat from it for production or other purposes. Flue gas heat exchanger is usually composed of many plate or tube heat exchange elements, which realize heat transfer and gas exchange through specific layout and design.

[0003] During the use of the flue gas heat exchanger, impurities and dust accumulate in the flue gas. When the heat exchanger handles the flue gas environment for a long time, the dust and impurities in the flue gas are easily accumulated on the surface of the heat exchanger, and it is very inconvenient to clean it, thus forming a blockage. In addition, the temperature and humidity changes of the flue gas cause condensation to form on the surface of the heat exchanger, which in turn causes the accumulation of condensation inside. Therefore, we propose a flue gas heat exchanger cleaning structure to avoid blockage of the heat exchanger. Utility Model Content

[0004] The purpose of the utility model is to provide a flue gas heat exchanger cleaning structure to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas heat exchanger cleaning structure, comprising a flue gas heat exchanger body, the side walls of the flue gas heat exchanger body are symmetrically fixedly connected with flue gas pipes, a square opening is provided at the center of the upper surface of the flue gas heat exchanger body, a replacement structure is installed at the square opening on the upper surface of the flue gas heat exchanger body, and a tubular heat exchange element is installed at the center of the replacement structure.

[0006] Preferably, the replacement structure includes studs, and the number of the studs is several. The lower surface of the studs is fixedly connected to the upper surface of the flue gas heat exchanger body near the square opening, and is evenly arranged in sequence. The outer wall of the stud is sleeved with a top plate, and the lower surface of the top plate fits with the upper surface of the flue gas heat exchanger body. The outer wall of the stud is threadedly connected with a double nut, and the lower surface of the double nut fits with the upper surface of the top plate. The side wall of the top plate is symmetrically fixedly connected with a lifting ring.

[0007] Preferably, it also includes a drainage structure, which is fixedly connected to the center of the lower surface of the flue gas heat exchanger body.

[0008] Preferably, the drainage structure includes a first flange pipe, the outer wall of the first flange pipe is fixedly connected to a vibration motor, the lower surface flange of the first flange pipe is flange-connected to a connecting pipe, the inner cavity of the connecting pipe is equipped with a butterfly valve, and the lower surface flange of the connecting pipe is flange-connected to a second flange pipe.

[0009] Preferably, a tilting block is fixedly connected to the bottom of the inner wall of the flue gas heat exchanger body, an annular opening is provided at the center of the tilting block, and the annular opening is connected to the upper surface of the first flange pipe.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: a condensate drainage structure is arranged at the bottom of the flue gas heat exchanger, and the closing switch is controlled by a butterfly valve. When a certain amount of condensate is accumulated, the drainage structure is controlled to discharge, which can effectively discharge the accumulated condensate and prevent the accumulated water from damaging the heat exchanger. By controlling the closing switch by the butterfly valve, the discharge of condensate can be conveniently controlled to avoid corrosion and damage to the heat exchanger by accumulated water, while also ensuring the normal operation of the heat exchanger. At the same time, the flue gas heat exchanger and the tubular heat exchange element are of split design, and the installation is completed by a replacement structure. When cleaning, the tubular heat exchange element can be removed by the replacement structure, which is convenient for fine cleaning work. At the same time, the tubular heat exchange element can be more easily cleaned and replaced, and it is convenient to replace it during maintenance. The split design makes it more convenient to repair and replace the tubular heat exchange element, reduces maintenance time, ensures the normal operation of the flue gas heat exchanger, and improves maintenance and cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Figure 2 for Figure 1 A magnified detail of the replacement structure;

[0013] Figure 3 for Figure 1 A magnified detail of the drainage structure;

[0014] In the figure: 1. Flue gas heat exchanger body; 2. Flue gas duct; 3. Drainage structure; 31. First flange pipe; 32. Vibration motor; 33. Continued pipe; 34. Butterfly valve; 35. Second flange pipe; 4. Replacement structure; 41. Stud; 42. Top plate; 43. Lifting ring; 44. Double nut; 5. Tubular heat exchange element; 6. Tilting block. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-3 The utility model provides a flue gas heat exchanger cleaning structure, including a flue gas heat exchanger body 1, a flue gas pipe 2 is symmetrically fixedly connected to the side wall of the flue gas heat exchanger body 1, a square opening is provided at the center of the upper surface of the flue gas heat exchanger body 1, a replacement structure 4 is installed at the square opening on the upper surface of the flue gas heat exchanger body 1, and a tubular heat exchange element 5 is installed at the center of the replacement structure 4.

[0017] The replacement structure 4 includes studs 41, and the number of studs 41 is several. The lower surface of the studs 41 is fixedly connected to the upper surface of the flue gas heat exchanger body 1 near the square opening, and is evenly arranged in sequence. The outer wall of the studs 41 is sleeved with a top plate 42, and the lower surface of the top plate 42 is fitted with the upper surface of the flue gas heat exchanger body 1. The outer wall of the studs 41 is threadedly connected with a double nut 44, and the lower surface of the double nut 44 is fitted with the upper surface of the top plate 42. The side wall of the top plate 42 is symmetrically fixedly connected with a lifting ring 43.

[0018] It also includes a drainage structure 3 which is fixedly connected to the center of the lower surface of the flue gas heat exchanger body 1 .

[0019] The drainage structure 3 includes a first flange pipe 31, the outer wall of the first flange pipe 31 is fixedly connected to a vibration motor 32, the lower surface of the first flange pipe 31 is flange-connected to a connecting pipe 33, the inner cavity of the connecting pipe 33 is equipped with a butterfly valve 34, and the lower surface of the connecting pipe 33 is flange-connected to a second flange pipe 35.

[0020] The bottom of the inner wall of the flue gas heat exchanger body 1 is fixedly connected with a tilting block 6 , and a circular opening is provided at the center of the tilting block 6 , and the circular opening is connected to the upper surface of the first flange pipe 31 .

[0021] Working principle: When the flue gas heat exchanger is used, the flue gas heat exchanger body 1 discharges flue gas through the flue gas pipes 2 on both sides, and is connected to external fluid equipment through the tubular heat exchange element 5. The fluid flows into the tubular heat exchange element 5. Due to the temperature difference between the fluid and the flue gas, heat exchange occurs, and the heat exchange of the flue gas is effectively performed. Then, during the flue gas heat exchange process, impurities and dust accumulate in the flue gas. In the heat exchanger that handles the flue gas environment for a long time, the dust and impurities in the flue gas are easily accumulated on the surface of the tubular heat exchange element 5. When cleaning work is required, subsequent cleaning or replacement work is performed by disassembling the replacement structure 4. First, turn the double nut 44 to cancel the threaded connection with the stud 41, and then connect the lifting equipment to the lifting ring 43. Remove the top plate 42 by lifting, and the top plate 42 is disassembled together with the tubular heat exchange element 5. Cleaning is convenient for fine cleaning of the gaps in the tubular heat exchange element 5. When the temperature and humidity of the flue gas change, resulting in the formation of condensed water on the surface of the tubular heat exchange element 5, the condensed water drips into the inner cavity of the flue gas heat exchanger body 1 and accumulates, and is discharged through the drainage structure 3. The drainage structure 3 is connected to the flue gas heat exchanger body 1 through the first flange pipe 31. When a certain amount of condensed water accumulates, it will flow into the first flange pipe 31. The switch is controlled by the butterfly valve 34 in the connecting pipe 5 to avoid a large amount of flue gas outflow. When it is necessary to discharge the condensed water, the butterfly valve 34 is opened, and the vibration motor 32 can also be turned on to facilitate the vibration of the condensed water inside the first flange pipe 31 and discharge it through the second flange pipe 35 at the bottom of the connecting pipe 33. The use of the drainage structure 3 and the replacement structure 4 facilitates the cleaning of the flue gas heat exchanger.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flue gas heat exchanger cleaning structure, characterized in that: The invention comprises a flue gas heat exchanger body (1), the side wall of the flue gas heat exchanger body (1) is symmetrically fixedly connected with a flue gas pipe (2), a square opening is arranged at the center of the upper surface of the flue gas heat exchanger body (1), a replacement structure (4) is installed at the square opening of the upper surface of the flue gas heat exchanger body (1), a tubular heat exchange element (5) is installed at the center of the replacement structure (4), the replacement structure (4) comprises a stud (41), the number of the studs (41) is several, the lower surface of the stud (41) is fixedly connected to the upper surface of the flue gas heat exchanger body (1) near the square opening, and is evenly arranged in sequence, the outer wall of the stud (41) is sleeved with a top plate (42), the lower surface of the top plate (42) is symmetrical with the flue gas heat exchanger body (1), and the upper surface of the flue gas heat exchanger body (1) is symmetrically connected with the upper surface of the flue gas heat exchanger body (1). The upper surface of the stud (41) is fitted with a double nut (44) through a thread on the outer wall, the lower surface of the double nut (44) is fitted with the upper surface of the top plate (42), the side wall of the top plate (42) is symmetrically fixedly connected with a lifting ring (43), and also includes a drainage structure (3), the drainage structure (3) is fixedly connected to the center of the lower surface of the flue gas heat exchanger body (1), the drainage structure (3) includes a first flange pipe (31), the outer side wall of the first flange pipe (31) is fixedly connected with a vibration motor (32), the lower surface of the first flange pipe (31) is flange-connected with a connecting pipe (33), the inner cavity of the connecting pipe (33) is installed with a butterfly valve (34), and the lower surface of the connecting pipe (33) is flange-connected with a second flange pipe (35).

2. A flue gas heat exchanger cleaning structure according to claim 1, characterized in that: The bottom of the inner wall of the flue gas heat exchanger body (1) is fixedly connected to a tilting block (6), a circular opening is provided at the center of the tilting block (6), and the circular opening is connected to the upper surface of the first flange pipe (31).

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