Heat exchanger for power generation system

Abstract

The utility model discloses a heat exchanger for a power generation system, which belongs to the technical field of heat exchangers and comprises a heat exchanger shell, a heat exchange tube component arranged in the heat exchanger shell, a first end cover arranged at one end of the heat exchanger shell and a self-cleaning filter mechanism arranged in the heat exchanger shell. The self-cleaning filtering mechanism comprises a dust filtering net, a driven rotating shaft, a cleaning brush seat and cleaning brush bristles, the dust filtering net is arranged in an inner cavity of the heat exchanger shell, and the driven rotating shaft is rotationally connected to the interior of the dust filtering net; according to the utility model, through the self-cleaning filtering mechanism, the cleaning brush seat is attached to the dust filter screen through the cleaning bristles to brush, so that implementation conditions for cleaning accumulated dust intercepted by the dust filter screen can be provided; and the dust filter screen is used for intercepting impurities in the flue gas, so that the problems of difficulty in cleaning and influence on heat exchange performance caused by accumulated dust on the pipe wall due to the fact that a large amount of the impurities enter the heat exchange pipe assembly can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat exchangers, and in particular relates to a heat exchanger for a power generation system. Background Art

[0002] The power generation system and the heat exchanger are closely related in the process of energy conversion and utilization. In the process of energy conversion, a large amount of waste heat is often generated. The heat exchanger plays a key role in this process. It is responsible for recovering and reusing the waste heat to improve energy efficiency. The power generation system and the heat exchanger each have their own responsibilities in the energy field and jointly promote the efficient conversion and utilization of energy. The power generation system is responsible for the main conversion of energy, while the heat exchanger is responsible for the recovery and reuse of waste heat. The two complement each other and jointly promote the sustainable development of the energy industry; the application number is recorded in 202323238469.2 A heat exchanger device for a gas turbine power plant is disclosed, comprising: a heat exchange box, on which a multi-section heat exchange plate heat exchange structure is installed; the multi-section heat exchange plate heat exchange structure comprises: a heat exchange chamber, an air inlet pipe, an exhaust pipe, a water inlet pipe, a drain pipe, two pairs of limit rails, a plate heat exchange component and a maintenance box cover; the utility model relates to the technical field of heat exchange equipment, and the beneficial effect of this case is: it solves the problem that when the existing gas turbine power plant is generating electricity and exhausting gas, the exhaust gas contains a large amount of heat, and the heat is directly discharged into the air, causing a large amount of heat loss, and the high-temperature direct discharge is easy to affect the surrounding environment.

[0003] The above technical solution does not take into account the problem of a large amount of impurities in the flue gas before heat exchange. In this way, the untreated impurity-containing flue gas directly enters the heat exchange tube assembly, which easily leaves impurities on the tube wall. The dust accumulation on the tube wall of the heat exchange tube assembly is not only difficult to clean, but also increases the thickness of the tube wall and affects the heat exchange performance. However, although the simple traditional built-in filter method reduces the difficulty and frequency of cleaning the heat exchange tube assembly, this part of the filter is still built into the heat exchanger. After dust accumulation, the filter has the disadvantages of being difficult to clean and the dust accumulation affecting the flue gas passing efficiency. Utility Model Content

[0004] The purpose of the present invention is to provide a heat exchanger for a power generation system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a heat exchanger for a power generation system, comprising a heat exchanger shell, a heat exchange tube assembly being arranged inside the heat exchanger shell, a first end cover being arranged at one end of the heat exchanger shell, a self-cleaning filter mechanism being arranged inside the heat exchanger shell, the self-cleaning filter mechanism comprising a dust filter, a driven rotating shaft, a cleaning brush seat and cleaning bristles, the dust filter being arranged in the inner cavity of the heat exchanger shell, the driven rotating shaft being rotatably connected to the inside of the dust filter, the cleaning brush seat being fixed on the side surface of the driven rotating shaft, and the cleaning bristles being fixed on an end surface of the cleaning brush seat close to the dust filter, an exhaust drive mechanism being arranged between the first end cover and the heat exchanger shell, the exhaust drive mechanism comprising a driven blade and a booster duct fan, the driven blade being fixed on the side surface of the driven rotating shaft, and the booster duct fan being arranged above the driven blade.

[0006] It should be noted that, in the solution, a mounting ring is fixed to the outer edge of the dust filter, a rotating bearing is fixed to the inner edge of the dust filter, and one end of the driven shaft extends into the rotating bearing.

[0007] It is further worth noting that the cleaning bristles are attached to the surface of the dust filter, and the dust filter is arranged at the air inlet end of the heat exchange tube assembly.

[0008] It should be further explained that a smoke inlet pipe is fixed to the upper portion of the first end cover, a mounting box is fixed to the upper end of the smoke inlet pipe, and a butt joint is fixed to the upper portion of the mounting box.

[0009] As a preferred embodiment, the booster duct fan is fixed inside the installation box, and the butt joint, the smoke inlet pipe and the inner cavity of the first end cover are connected.

[0010] As a preferred embodiment, a second end cover is fixed to the end of the heat exchanger shell away from the first end cover, a smoke exhaust pipe is fixed to the lower part of the second end cover, a heat exchange medium inlet pipe is fixed to the upper part of the heat exchanger shell, and a heat exchange medium exhaust pipe is fixed to the lower part of the heat exchanger shell.

[0011] Compared with the prior art, the heat exchanger for power generation system provided by the present invention includes at least the following

[0012] Beneficial effects:

[0013] Through the self-cleaning filtering mechanism, the cleaning brush holder can provide the conditions for cleaning the accumulated dust by brushing the cleaning bristles against the dust filter. The dust filter arranged therein intercepts impurities in the flue gas in a manner that can prevent them from entering the heat exchange tube assembly in large quantities, causing cleaning difficulties and dust accumulation on the tube wall affecting the heat exchange performance.

[0014] Through the exhaust drive mechanism, the strong airflow formed by the high-temperature flue gas after pressurization impacts the driven blades and causes the driven shaft and the cleaning brush seat to rotate. The booster duct fan simultaneously provides power conditions to the driven blades in the process of promoting the entry of flue gas so as to achieve the purpose of self-cleaning of the dust filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 This is a perspective view of the cross-sectional structure of the first end cover of the present invention;

[0017] Figure 3 This is a three-dimensional diagram of the dust filter structure of the present utility model;

[0018] Figure 4 This is a three-dimensional diagram of the booster duct fan structure of the present utility model.

[0019] In the figure: 1. Heat exchanger shell; 2. First end cover; 3. Second end cover; 4. Flue gas inlet pipe; 5. Flue gas outlet pipe; 6. Heat exchange medium inlet pipe; 7. Heat exchange medium outlet pipe; 8. Heat exchange tube assembly; 9. Mounting ring; 10. Dust filter; 11. Rotating bearing; 12. Driven shaft; 13. Driven blades; 14. Cleaning brush holder; 15. Cleaning brush bristles; 16. Mounting box; 17. Docking pipe joint; 18. Booster duct fan. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] See also Figure 1-4The utility model provides a heat exchanger for a power generation system, comprising a heat exchanger shell 1, a heat exchange tube assembly 8 is arranged inside the heat exchanger shell 1, a first end cover 2 is arranged at one end of the heat exchanger shell 1, and a self-cleaning filtering mechanism is arranged inside the heat exchanger shell 1, the self-cleaning filtering mechanism comprises a dust filter 10, a driven rotating shaft 12, a cleaning brush seat 14 and cleaning bristles 15, the dust filter 10 is arranged in the inner cavity of the heat exchanger shell 1, the driven rotating shaft 12 is rotatably connected to the inside of the dust filter 10, the cleaning brush seat 14 is fixed on the side surface of the driven rotating shaft 12, and the cleaning bristles 15 are fixed on an end surface of the cleaning brush seat 14 close to the dust filter 10, and a smoke exhaust drive mechanism is arranged between the first end cover 2 and the heat exchanger shell 1, the smoke exhaust drive mechanism comprises a driven blade 13 and a booster duct fan 18, the driven blade 13 is fixed on the side surface of the driven rotating shaft 12, and the booster duct fan 18 is arranged above the driven blade 13.

[0022] Further as Figure 1 、 Figure 2 and Figure 3 As shown, it is worth noting that a mounting ring 9 is fixed to the outer edge of the dust filter 10 , a rotating bearing 11 is fixed to the inner edge of the dust filter 10 , and one end of the driven shaft 12 extends into the rotating bearing 11 .

[0023] Further as Figure 3 As shown, it is worth noting that the cleaning bristles 15 are attached to the surface of the dust filter 10, and the dust filter 10 is arranged at the air inlet end of the heat exchange tube assembly 8.

[0024] This solution has the following working process: before use, high-temperature flue gas is introduced from the flue gas inlet pipe 4 and discharged from the flue gas outlet pipe 5 of the second end cover 3, while the heat exchange medium is introduced from the heat exchange medium inlet pipe 6 and discharged from the heat exchange medium outlet pipe 7. During use, the high-temperature flue gas converts heat to the heat exchange medium in the heat exchange tube assembly 8 and realizes the effect of waste heat recovery. Before the flue gas enters the first end cover 2, the high-temperature flue gas is pressurized by the booster duct fan 18 inside the installation box 16, so that the strong airflow formed by the high-temperature flue gas after pressurization hits the driven blades 13 and causes the driven rotating shaft 12 and the cleaning brush seat 14 to rotate. The cleaning brush seat 14 can provide the implementation conditions for cleaning the dust intercepted by it by brushing the cleaning bristles 15 against the dust filter 10. The dust filter 10 arranged therein intercepts impurities in the flue gas in a manner that can prevent them from entering the heat exchange tube assembly 8 in large quantities, causing cleaning difficulties and dust accumulation on the pipe wall affecting the heat exchange performance.

[0025] According to the above working process, it can be seen that the strong airflow formed by the high-temperature flue gas after being pressurized impacts the driven blades 13 and causes the driven rotating shaft 12 and the cleaning brush holder 14 to rotate, and the cleaning brush holder 14 can provide the implementation conditions for cleaning the dust intercepted by it by brushing the cleaning bristles 15 against the dust filter 10. The way in which the dust filter 10 intercepts impurities in the flue gas can prevent them from entering the heat exchange tube assembly 8 in large quantities, causing cleaning difficulties and dust accumulation on the tube wall affecting the heat exchange performance.

[0026] Further as Figure 1 、 Figure 2 and Figure 4 As shown, it is worth mentioning that a smoke inlet pipe 4 is fixed to the upper portion of the first end cover 2 , a mounting box 16 is fixed to the upper end of the smoke inlet pipe 4 , and a butt joint 17 is fixed to the upper portion of the mounting box 16 .

[0027] Further as Figure 4 As shown, it is worth mentioning that the booster duct fan 18 is fixed inside the mounting box 16, and the butt joint 17, the flue gas inlet pipe 4 and the inner cavity of the first end cover 2 are connected. During use, the arranged booster duct fan 18 can promote the introduction of flue gas into the heat exchange tube assembly 8. At the same time, the booster duct fan 18 provides power conditions to the driven blades 13 in the process of promoting the entry of flue gas so as to achieve the purpose of self-cleaning of the dust filter 10.

[0028] Further as Figure 1 As shown, it is worth mentioning that a second end cover 3 is fixed to the end of the heat exchanger shell 1 away from the first end cover 2, a flue gas exhaust pipe 5 is fixed to the lower part of the second end cover 3, a heat exchange medium inlet pipe 6 is fixed to the upper part of the heat exchanger shell 1, and a heat exchange medium exhaust pipe 7 is fixed to the lower part of the heat exchanger shell 1.

[0029] In summary: the cleaning brush holder 14 can provide the implementation conditions for cleaning the dust intercepted by the dust filter 10 by brushing the cleaning bristles 15 against it. The dust filter 10 arranged therein intercepts impurities in the flue gas in a manner that can prevent them from entering the heat exchange tube assembly 8 in large quantities and causing cleaning difficulties and dust accumulation on the tube wall affecting the heat exchange performance; the strong airflow formed by the high-temperature flue gas after being pressurized impacts the driven blades 13 and causes the driven shaft 12 and the cleaning brush holder 14 to rotate, and the booster duct fan 18 simultaneously provides power conditions to the driven blades 13 in the process of promoting the entry of flue gas so as to achieve the purpose of self-cleaning of the dust filter 10.

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Although the embodiments of the present invention have been shown and described, this does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention. Regarding the contents of the embodiments of the present invention, ordinary technicians in this field can understand that these embodiments can be subjected to various changes, modifications, substitutions and variations without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A heat exchanger for a power generation system, comprising a heat exchanger housing (1), characterized in that: A heat exchange tube assembly (8) is provided inside the heat exchanger shell (1), a first end cover (2) is provided at one end of the heat exchanger shell (1), a self-cleaning filter mechanism is provided inside the heat exchanger shell (1), and the self-cleaning filter mechanism includes a dust filter (10), a driven shaft (12), a cleaning brush seat (14) and cleaning bristles (15), the dust filter (10) is provided in the inner cavity of the heat exchanger shell (1), the driven shaft (12) is rotatably connected to the inside of the dust filter (10), and the dust filter (10) is provided in the inner cavity of the heat exchanger shell (1). The cleaning brush holder (14) is fixed on the side surface of the driven rotating shaft (12), and the cleaning bristles (15) are fixed on an end surface of the cleaning brush holder (14) close to the dust filter (10). A smoke exhaust drive mechanism is provided between the first end cover (2) and the heat exchanger housing (1), and the smoke exhaust drive mechanism includes a driven blade (13) and a booster duct fan (18). The driven blade (13) is fixed on the side surface of the driven rotating shaft (12), and the booster duct fan (18) is provided above the driven blade (13).

2. The heat exchanger for a power generation system according to claim 1, characterized in that: A mounting ring (9) is fixed to the outer edge of the dust filter (10), a rotating bearing (11) is fixed to the inner edge of the dust filter (10), and one end of the driven shaft (12) extends into the rotating bearing (11).

3. The heat exchanger for a power generation system according to claim 2, characterized in that: The cleaning bristles (15) are attached to the surface of the dust filter (10), and the dust filter (10) is arranged at the air inlet end of the heat exchange tube assembly (8).

4. The heat exchanger for a power generation system according to claim 3, characterized in that: A smoke inlet pipe (4) is fixed to the upper portion of the first end cover (2), a mounting box (16) is fixed to the upper end of the smoke inlet pipe (4), and a butt joint (17) is fixed to the upper portion of the mounting box (16).

5. The heat exchanger for a power generation system according to claim 4, characterized in that: The booster duct fan (18) is fixed inside the installation box (16), and the butt joint (17), the smoke inlet pipe (4) and the inner cavity of the first end cover (2) are connected.

6. The heat exchanger for a power generation system according to claim 5, characterized in that: A second end cover (3) is fixed to one end of the heat exchanger shell (1) away from the first end cover (2); a smoke exhaust pipe (5) is fixed to the lower portion of the second end cover (3); a heat exchange medium inlet pipe (6) is fixed to the upper portion of the heat exchanger shell (1); and a heat exchange medium exhaust pipe (7) is fixed to the lower portion of the heat exchanger shell (1).

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