Steam turbine drainage heat recovery device

Abstract

The steam turbine drainage heat recovery device comprises a box body, and the box body is filled with a heat exchange medium; the heat exchange pipe is installed in the box body, the heat exchange pipe comprises a plurality of parallel sub-exchange pipes, the sub-exchange pipes are communicated with one another, the cleaning assembly is installed in the box body and comprises a brush, and the brush extends in the length direction of the box body and can move in a reciprocating mode in the height direction of the box body; the sliding assembly is installed on the outer side of the box body, connected with the sweeping assembly and used for driving a brush in the sweeping assembly to move. According to the device, the cleaning assembly is arranged in the box body, dirt on the outer wall of the heat exchange pipe is cleaned through the brush, the heat exchange efficiency of the heat exchange pipe and the heat exchange medium is improved, the brush on the cleaning assembly moves in the height direction of the box body, the resistance of the brush to the heat exchange medium in the box body is reduced, and the heat exchange efficiency is improved. Therefore, the heat recovery device has higher heat exchange efficiency.

Description

Technical Field

[0001] The utility model generally relates to the field of heat recovery devices, specifically to the field of heat recovery in thermal power plants, and in particular to a steam turbine drain heat recovery device. Background Art

[0002] Steam turbine is also called steam turbine engine. It is a rotary steam power device. Steam turbine is the main equipment of modern thermal power plants and is also used in metallurgical industry, chemical industry and ship power device. At present, thermal power plants at home and abroad are equipped with heat recovery devices to recover the excess heat in water vapor. Most steam heat recovery devices heat the cooling water to remove the heat in the steam, thereby realizing heat recovery.

[0003] A Chinese utility model patent with publication number CN216049310U discloses a steam turbine drain heat recovery device for a thermal power plant, comprising a cold water tank and a serpentine pipe, wherein the serpentine pipe is installed inside the cold water tank, a mounting plate is slidably connected above the serpentine pipe, a cross plate is fixedly connected to the upper surface of the mounting plate, a rack is fixedly connected to the back of the cross plate, a gear is meshingly connected to the rack, a rotating shaft is fixedly connected to the middle of the upper surface of the gear, the top end of the rotating shaft passes through the upper surface of the cold water tank and is fixedly connected to a handle, and the rotating shaft is located in the middle of the upper surface of the cold water tank.

[0004] In the above scheme, the bristles always keep in contact with the serpentine tube, and the dirt swept by the bristles is easily deposited on the brush, making the cleaning effect of the brush worse; and the brush is vertically arranged in the cold water tank, which produces a certain resistance to the flow of water in the cold water tank, increases the water circulation resistance in the cold water tank, and increases the energy consumption of the water pump. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a steam turbine drain heat recovery device.

[0006] In a first aspect, a steam turbine drain heat recovery device is provided, comprising:

[0007] A box body, wherein the box body is filled with a heat exchange medium;

[0008] A heat exchange tube, wherein the heat exchange tube is installed in the box body, and the heat exchange tube comprises a plurality of parallel sub-exchange tubes, and the plurality of sub-exchange tubes are interconnected.

[0009] A cleaning assembly, the cleaning assembly is installed in the box and includes a brush, the brush extends along the length direction of the box and can reciprocate along the height direction of the box;

[0010] A sliding assembly is installed on the outside of the box body and connected to the cleaning assembly, and is used to drive the brush in the cleaning assembly to move.

[0011] As an achievable manner, the cleaning assembly further comprises: a first connecting rod, the brush being mounted on a side of the first connecting rod close to the heat exchange tube;

[0012] A first guide rail, the first guide rail is arranged at an end of the first connecting rod and is slidably connected to the end of the first connecting rod;

[0013] A first magnet is mounted on a side of the first connecting rod facing away from the heat exchange tube.

[0014] As an achievable manner, the sliding assembly includes: a second connecting rod, the second connecting rod is arranged outside the box body and can move along the outer side wall of the box body;

[0015] A second guide rail, which is arranged at two ends of the second connecting rod and is slidably connected to the ends of the second guide rail respectively;

[0016] The second magnet is installed on a side of the first connecting rod close to the box body. The polarity of the second magnet is opposite to that of the first magnet, and the second magnet is magnetically connected to the first magnet.

[0017] As an achievable manner, a protruding gripping plate is provided on a side of the second connecting rod facing away from the box body.

[0018] As a feasible manner, the box body is provided with a liquid inlet and a liquid outlet, the first guide rail includes a stroke starting point and a stroke end point, and the stroke end point is arranged close to the liquid outlet.

[0019] As a feasible manner, a positioning plate is provided on the box body, the positioning plate is arranged close to the starting point of the travel of the first guide rail, and a magnetically absorbable material is provided on the positioning plate.

[0020] As a feasible manner, the positioning plate is disposed beyond the side wall of the box body, and the magnetically attractable material is disposed on a portion of the positioning plate that exceeds the side wall of the box body.

[0021] As an achievable manner, the magnetically attractable material is a third magnet, and the third magnet has opposite magnetic properties to the second magnet.

[0022] As an implementable manner, the first guide rail and the second guide rail extend along the length direction of the sub-exchange tube.

[0023] As an achievable method, two groups of the cleaning components and two groups of the sliding components are included, the cleaning components are respectively arranged on both sides of the heat exchange tube, and the brushes are arranged toward the heat exchange tube.

[0024] The sliding components and the cleaning components are arranged in a one-to-one correspondence.

[0025] The device provided in the present application improves the heat exchange efficiency between the heat exchange tube and the heat exchange medium by arranging a cleaning component in the box body, and uses a brush to clean the dirt on the outer wall of the heat exchange tube, and moves the brush on the cleaning component in the direction of the box body height, thereby reducing the resistance of the brush to the heat exchange medium in the box body, so that the heat recovery device has a higher heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 A schematic diagram of the structure of a steam turbine drain heat recovery device provided in this embodiment;

[0028] Figure 2 A schematic diagram of a steam turbine drain heat recovery device provided in this embodiment from another angle;

[0029] Figure 3 for Figure 2 A partial enlarged view of the

[0030] Figure 4 A partial cross-sectional view of a steam turbine drain heat recovery device provided in this embodiment;

[0031] Figure 5 A schematic diagram of the internal structure of the device provided in this embodiment;

[0032] Figure 6 A schematic diagram of the cleaning assembly structure provided in this embodiment;

[0033] Figure 7 This is a partial structural schematic diagram of the sliding assembly provided in this embodiment.

[0034] Reference numerals:

[0035] 1- box body; 11- liquid outlet; 12- liquid inlet;

[0036] 2-heat exchange tube; 21-sub-exchange tube;

[0037] 3- Cleaning components;

[0038] 31-first connecting rod; 32-first guide rail; 33-first magnet;

[0039] 34-brush;

[0040] 4- Sliding assembly;

[0041] 41-second connecting rod; 42-second guide rail; 43-grip plate;

[0042] 44-ear plate; 45-second magnet;

[0043] 5-the third magnet; 6-the positioning plate. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0045] refer to Figure 1 and Figure 2 As shown, the embodiment of the present application provides a steam turbine drain heat recovery device, comprising:

[0046] A box body 1, wherein the box body 1 is filled with a heat exchange medium;

[0047] The heat exchange tube 2 is installed in the box body 1, and the heat exchange tube 2 includes a plurality of parallel sub-exchange tubes 21, and the plurality of sub-exchange tubes 21 are interconnected.

[0048] A cleaning assembly 3, the cleaning assembly 3 is installed in the box body 1 and includes a brush 34, the brush 34 extends along the length direction of the box body 1 and can reciprocate along the height direction of the box body 1;

[0049] The sliding component 4 is installed on the outside of the box body 1 and connected to the cleaning component 3, and is used to drive the brush 34 in the cleaning component 3 to move.

[0050] The device provided in this embodiment improves the heat exchange efficiency between the heat exchange tube 2 and the heat exchange medium by arranging a cleaning component 3 in the box body 1, and cleaning the dirt on the outer wall of the heat exchange tube 2 by a brush 34, and moves the brush 34 on the cleaning component 3 in the height direction of the box body 1, thereby reducing the resistance of the brush 34 to the heat exchange medium in the box body 1, so that the heat recovery device has a higher heat exchange efficiency.

[0051] The device provided in this embodiment includes a box body 1, a heat exchange tube 2 is installed in the box body 1 and filled with a heat exchange medium, generally cold water is selected as the heat exchange medium, the heat exchange tube 2 is installed inside the box body 1, and is provided with an inlet and an outlet, and a liquid that needs to be heat exchanged flows inside. The heat exchange tube 2 in this embodiment is provided with a plurality of parallel sub-exchange tubes 21, which are arranged in a certain order, and the plurality of sub-exchange tubes 21 are connected in sequence to form a heat exchange tube 21. Figure 4 and Figure 5 The wavy structure shown in the figure can make more liquid flow through the heat exchange tube 2, so the heat exchange efficiency is higher, and the brush 34 on the cleaning component 3 is arranged along the length direction of the box body 1, so that the brush has a longer length, thereby improving the cleaning efficiency. Figure 4 In the X-axis direction shown in FIG, the brush 34 reciprocates along the height direction of the box 1, that is, Figure 4 In the Y-axis direction shown in , while the outer wall of the heat exchange tube 2 is being cleaned, the resistance to the heat exchange medium in the box body 1 is relatively small, and the heat exchange efficiency of the overall structure is guaranteed.

[0052] The cleaning assembly 3 in this embodiment further includes: a first connecting rod 31, and the brush 34 is installed on a side of the first connecting rod 31 close to the heat exchange tube 2;

[0053] A first guide rail 32, wherein the first guide rail 32 is disposed at an end of the first connecting rod 31 and is slidably connected to the end of the first connecting rod 31;

[0054] The first magnet 33 is mounted on a side of the first connecting rod 31 facing away from the heat exchange tube 2 .

[0055] refer to Figures 4 to 6 As shown, the cleaning assembly 3 provided in this embodiment includes a first guide rail 32 and a first connecting rod 31. The first connecting rod 31 is slidably connected to the first guide rail 32 and can reciprocate along the first guide rail 32. The brush 34 is installed on the first connecting rod 31, and the reciprocating movement of the brush 34 is driven by the movement of the first connecting rod 31. In order to achieve the above-mentioned purpose of reciprocating along the height direction of the box body 1, the length direction of the first connecting rod 31 in this embodiment is the same as the length direction of the brush 34. The first guide rail 32 extends along the length direction of the sub-exchange tube 21. Preferably, a slide groove is provided on the first guide rail 32, and a slide matching the slide groove is provided on the first connecting rod 31. The slide groove is clamped in the slide groove for movement. In addition, in order to ensure the smoothness of the first connecting rod 31 sliding along the first guide rail 32, it is preferred that first guide rails 32 are provided at both ends of the first connecting rod 31, and the first connecting rod 31 is limited and slidably controlled from both ends. As shown in FIG. Figure 6As shown, a first magnet 33 is also arranged on the first connecting rod 31 , and the first magnet 33 is connected to a sliding assembly 4 arranged outside the box body 1 , and the movement of the cleaning assembly 3 is controlled by the sliding assembly 4 .

[0056] Optionally, the sliding assembly 4 includes: a second connecting rod 41, which is arranged outside the box body 1 and can move along the outer side wall of the box body 1;

[0057] A second guide rail 42, which is disposed at both ends of the second connecting rod 41 and is slidably connected to the ends of the second guide rail 42;

[0058] The second magnet 45 is installed on a side of the first connecting rod 31 close to the box body 1 . The polarity of the second magnet 45 is opposite to that of the first magnet 33 , and the second magnet 45 is magnetically connected to the first magnet 33 .

[0059] refer to Figure 1 , Figure 2 and Figure 7 As shown, in this embodiment, the sliding assembly 4 includes a second connecting rod 41, and the second connecting rod 41 is arranged close to the outer wall of the box body 1, and a second magnet 45 with a polarity opposite to that of the first magnet 33 is arranged on the second connecting rod 41. The second magnet 45 is adsorbed by the first magnet 33 to control the sliding of the second connecting rod 41 from the outside of the box body 1 and thus control the movement of the first connecting rod 31 and the brush 34 inside the box body 1. Therefore, the second connecting rod 41 is arranged parallel to the first connecting rod 31, and the second guide rail 42 and the first guide rail 32 are also arranged parallel to each other. The second magnet 45 is arranged on a side of the second connecting rod 41 close to the box body 1, or a corresponding groove is directly dug on the second connecting rod 41 to place the second magnet 45.

[0060] In addition, a second guide rail 42 is also provided on the outer wall of the box body 1 to achieve a sliding connection with the second connecting rod 41. In this embodiment, two second guide rails 42 are preferably provided on the outer wall of the box body 1, and the second connecting rod 41 is provided between the two second guide rails 42. The second guide rail 42 is preferably provided in a columnar form, and connecting ear plates 44 are provided at both ends of the second connecting rod 41. The connecting rod ear plates 44 are provided with guide holes matching the column. In this setting form, the second guide rail 42 and the second connecting rod 41 are tightly connected and are not easy to fall off.

[0061] Optionally, a protruding grip plate 43 is provided on a surface of the second connecting rod 41 facing away from the box body 1 .

[0062] like Figure 1 As shown, a protruding grip plate 43 is also provided on the second connecting rod 41, through which the operator can operate conveniently, and the size of the grip plate 43 is determined according to the operator's convenience in operating the second connecting rod 41 and applying force.

[0063] Optionally, the box body 1 is provided with a liquid inlet 12 and a liquid outlet 11 , and the first guide rail 32 includes a stroke starting point and a stroke end point, and the stroke end point is arranged close to the liquid outlet 11 .

[0064] The brush 34 in this embodiment reciprocates along the direction of the first guide rail 32 (also the direction of the second guide rail 42), one end of the first guide rail 32 is the starting point of the stroke, and the other end is the end of the stroke. The brush 34 reciprocates between the starting point of the stroke and the end of the stroke, and stays at the position of the starting point of the stroke when not in use. The box body 1 in this embodiment is provided with a liquid inlet 12 and a liquid outlet 11 for the flow of heat exchange medium. Preferably, the liquid inlet 12 on the box body 1 is set at a higher position, and the liquid outlet 11 is set at a lower position. The heat exchange medium flows from the liquid inlet 12 to the liquid outlet 11 and can flow through the entire box body 1 to a large extent, thus achieving a good heat exchange effect. At the same time, the liquid outlet 11 is set at a lower position, for example, flush with the bottom end of the heat exchange tube 2, that is, the end of the stroke, or lower than the bottom end of the heat exchange tube 2, so that the pollutants cleaned by the brush 34 during the cleaning process of the heat exchange tube 2 can flow out of the liquid outlet 11 along the flow of the heat exchange medium, and will not stay on the brush 34, thereby affecting the cleaning effect of the brush 34. Among them, it is preferred that the box body 1 in this embodiment is arranged according to Figure 1 The first connecting rod 31 and the second connecting rod 41 are placed in the position shown, and are close to the side wall of the box body 1. The liquid outlet 11 is also located at the lower end in a spatial sense, so that the cleaned pollutants move toward the liquid outlet 11 under the action of their own gravity, resulting in a better cleaning effect.

[0065] Optionally, a positioning plate 6 is provided on the box body 1 , and the positioning plate 6 is arranged close to the starting point of the travel of the first guide rail 32 , and a magnetically absorbable material is provided on the positioning plate 6 .

[0066] The box body 1 provided in this embodiment is also provided with a positioning plate 6, and a magnetically absorbable material is provided on the positioning plate 6. When the first connecting rod 31 and the second connecting rod 41 drive the brush 34 to complete cleaning, the first connecting rod 31 and the second connecting rod 41 can be placed close to the positioning plate 6, and the first connecting rod 31 and the second connecting rod 41 and other structures can be adsorbed on the positioning plate 6, and the positioning plate 6 is provided on the top plate of the box body 1, that is, Figure 1 At the top of the box 1 shown, this arrangement can prevent pollutants deposited at the bottom of the box 1 from gathering on the brush 34, and at the same time can reduce the resistance of the brush 34 to the flow of heat exchange medium in the box 1, so that the device has a better heat exchange effect.

[0067] Optionally, the positioning plate 6 is disposed beyond the side wall of the box body 1 , and the magnetically attractable material is disposed on a portion of the positioning plate 6 that exceeds the side wall of the box body 1 .

[0068] refer to Figure 1 and Figure 3 As shown, the positioning plate 6 in this embodiment includes a portion that exceeds the side wall of the box body 1, and a magnetically attractive material is set on the portion of the positioning plate 6 that exceeds the side wall. The magnetically attractive material can be diverse, for example, it can be a magnetic material, or the positioning plate 6 can be directly set to a magnetically attractive metal material such as iron.

[0069] Optionally, the magnetically attractable material is a third magnet 5 , and the third magnet 5 has opposite polarity to the second magnet 45 .

[0070] In this embodiment, magnets are preferably used as the magnetically attractive material on the positioning plate 6. Therefore, the third magnet 5 is arranged on the protruding part of the positioning plate 6, so that the third magnet 5 can be adsorbed with the second magnet 45 on the second connecting rod 41, and the first magnet 33 on the first connecting rod 31 in the box body 1 will not interfere with the third magnet 5.

[0071] Optionally, the first guide rail 32 and the second guide rail 42 extend along the length direction of the sub-exchange tube 21 .

[0072] The heat exchange tube 2 in this embodiment is composed of a plurality of interconnected sub-exchange tubes 21, which extend along the height of the box body 1 and are arranged along the length direction of the box body 1 to form a heat exchange tube 21. Figure 4 The structure shown enables the first guide rail 32 and the second guide rail 42 to be parallel to the sub-exchange tube 21 and in the same direction, and the corresponding brush 34 can move along the length direction of the sub-exchange tube 21 for cleaning. This type of brush 34 has a better cleaning effect and is not easily worn.

[0073] Optionally, two groups of cleaning components 3 and two groups of sliding components 4 are included, the cleaning components 3 are respectively arranged on both sides of the heat exchange tube 2, and the brush 34 is arranged toward the heat exchange tube 2.

[0074] The sliding components 4 and the cleaning components 3 are arranged in a one-to-one correspondence.

[0075] In this embodiment, cleaning components 3 and sliding components 4 connected to the cleaning components 3 are respectively arranged on both sides of the heat exchange tube 2 to clean the heat exchange tube 2, thereby achieving a better cleaning effect.

[0076] When the device provided in the above embodiment is used, heat exchange is performed between the heat exchange medium in the housing 1 and the steam turbine drain to realize heat recovery. When dirt accumulates on the outer wall of the heat exchange tube 2 and needs to be cleaned, the staff pinches the grip plate 43 on the second connecting rod 41 to drag the second connecting rod 41 up and down, driving the first connecting rod 31 and the brush 34 to move up and down, and the outside of the heat exchange tube 2 is cleaned by the brush 34. The cleaned dirt settles to the bottom of the housing 1 and is discharged from the liquid outlet 11 along with the flow of the heat exchange medium. After the cleaning is completed, the second connecting rod 41 is slid to the position of the top positioning plate 6, and the second magnet 45 is attracted by the third magnet 5 on the positioning plate 6, and the second connecting rod 41 and the first connecting rod 31 are fixed at the positioning plate 6, and the brush 34 is fixed at the top of the housing 1, so that the dirt is deposited on the brush 34, and the brush 34 will not produce resistance and influence on the flow of the heat exchange medium inside the housing 1. .

[0077] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means more than three.

[0078] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A steam turbine drain heat recovery device, characterized in that: include: A box body, wherein the box body is filled with a heat exchange medium; A heat exchange tube, wherein the heat exchange tube is installed in the box body, and the heat exchange tube comprises a plurality of parallel sub-exchange tubes, and the plurality of sub-exchange tubes are interconnected. A cleaning assembly, the cleaning assembly is installed in the box and includes a brush, the brush extends along the length direction of the box and can reciprocate along the height direction of the box; A sliding assembly is installed on the outside of the box body and connected to the cleaning assembly, and is used to drive the brush in the cleaning assembly to move.

2. The steam turbine drain heat recovery device according to claim 1, characterized in that: The cleaning assembly further comprises: a first connecting rod, the brush being mounted on a side of the first connecting rod close to the heat exchange tube; A first guide rail, the first guide rail is arranged at an end of the first connecting rod and is slidably connected to the end of the first connecting rod; A first magnet is mounted on a side of the first connecting rod facing away from the heat exchange tube.

3. The steam turbine drain heat recovery device according to claim 2, characterized in that: The sliding assembly comprises: a second connecting rod, which is arranged outside the box body and can move along the outer side wall of the box body; A second guide rail, which is arranged at two ends of the second connecting rod and is slidably connected to the ends of the second guide rail respectively; The second magnet is installed on a side of the first connecting rod close to the box body. The polarity of the second magnet is opposite to that of the first magnet, and the second magnet is magnetically connected to the first magnet.

4. The steam turbine drain heat recovery device according to claim 3, characterized in that: A protruding gripping plate is provided on a side of the second connecting rod facing away from the box body.

5. The steam turbine drain heat recovery device according to claim 2, characterized in that: The box body is provided with a liquid inlet and a liquid outlet, the first guide rail includes a stroke starting point and a stroke end point, and the stroke end point is arranged close to the liquid outlet.

6. The steam turbine drain heat recovery device according to claim 3, characterized in that: A positioning plate is provided on the box body, and the positioning plate is arranged close to the starting point of the travel of the first guide rail. A magnetically absorbable material is provided on the positioning plate.

7. The steam turbine drain heat recovery device according to claim 6, characterized in that: The positioning plate is arranged beyond the side wall of the box body, and the magnetically attractable material is arranged on the portion of the positioning plate that exceeds the side wall of the box body.

8. The steam turbine drain heat recovery device according to claim 7, characterized in that: The magnetically attractable material is a third magnet, and the third magnet has opposite magnetic properties to the second magnet.

9. The steam turbine drain heat recovery device according to claim 3, characterized in that: The first guide rail and the second guide rail extend along the length direction of the sub-exchange tube.

10. The steam turbine drain heat recovery device according to claim 1, characterized in that: It comprises two groups of cleaning components and two groups of sliding components. The cleaning components are respectively arranged on both sides of the heat exchange tube. The brushes are arranged toward the heat exchange tube. The sliding components and the cleaning components are arranged in a one-to-one correspondence.

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