Parallel heat exchange tube panel of reheater

Abstract

This utility model discloses a parallel heat exchanger tube panel for a reheater, comprising two first sidewalls arranged opposite each other and several rows of heat exchanger tubes disposed between the two first sidewalls, with the heat exchanger tube units of adjacent rows of tubes staggered; each heat exchanger tube unit is fixedly connected to the first sidewall, and adjacent heat exchanger tube units are connected and communicate with each other via a connecting bend; it also includes an inlet main pipe and an outlet main pipe fixedly connected to the first sidewall, and the inlet main pipe and outlet main pipe communicate with the heat exchanger tube units; the inlet main pipe, outlet main pipe, and connecting bend are disposed outside the first sidewall. The above-mentioned parallel heat exchanger tube panel design for a reheater is reasonable, with the staggered arrangement of adjacent upper and lower rows of heat exchanger tubes avoiding the formation of flue gas corridors and improving flue gas utilization.

Description

Technical Field

[0001] This utility model relates to the field of flue gas waste heat recovery technology, and in particular to a reheater parallel heat exchange tube panel. Background Technology

[0002] Flue gas is a major source of energy waste in general energy-consuming equipment. With the continuous development of energy conservation efforts, people are using some equipment to recover waste heat from flue gas in order to achieve the goal of energy conservation and emission reduction. Flue gas waste heat recovery equipment mainly converts the heat carried by flue gas into usable heat through some heat exchange method.

[0003] A common heat conversion method is to use heat exchange tubes to absorb heat from high-temperature flue gas, thereby raising the temperature of the water inside the heat exchange tubes, reducing the exhaust temperature of the flue gas, saving energy, improving efficiency, and is widely used in industrial production processes.

[0004] In common heat exchanger tube panels, the heat exchanger tubes are arranged in a regular, side-by-side configuration, which easily forms a flue gas corridor. This means that the flue gas passes directly and quickly through the channel between two adjacent rows of heat exchanger tubes, reducing the utilization rate of flue gas heat.

[0005] Therefore, it is necessary to improve the heat exchanger tube panels in the existing technology. Utility Model Content

[0006] The purpose of this utility model is to overcome the defects in the existing technology and provide a reheater parallel heat exchange tube panel, in which the adjacent upper and lower rows of heat exchange tubes are staggered to avoid the formation of flue gas corridors and improve flue gas utilization.

[0007] To achieve the above technical effects, the technical solution of this utility model is as follows: a reheater parallel heat exchange tube panel, including two first sidewalls arranged opposite each other and several rows of heat exchange tubes arranged between the two first sidewalls, with the heat exchange tube units of two adjacent heat exchange tube rows staggered; the heat exchange tube units are fixedly connected to the first sidewalls, and two adjacent heat exchange tube units are connected and communicate with each other through a connecting bend; it also includes an inlet main pipe and an outlet main pipe fixedly connected to the first sidewalls, and the inlet main pipe and outlet main pipe communicate with the heat exchange tube units; the inlet main pipe, outlet main pipe, and connecting bend are arranged outside the first sidewalls.

[0008] According to one embodiment of the present invention, it further includes two second sidewalls arranged opposite to each other, the second sidewalls being fixedly connected to the first sidewall, and the second sidewalls and the first sidewalls cooperating to enclose a flue gas passage.

[0009] According to one embodiment of the present invention, the heat exchange tube unit adjacent to the second side wall is a heat exchange tube mounting unit, and a smoke baffle is fixedly provided on the inner wall of the second side wall and / or the heat exchange tube mounting unit.

[0010] According to one embodiment of the present invention, the wall of the heat exchange tube is fixedly provided with an installation plate, and the smoke baffle includes a first baffle, which is fixedly connected to the installation plate.

[0011] According to one embodiment of the present invention, an expansion gap is provided between the first baffle and the second sidewall for thermal expansion of the first baffle.

[0012] According to one embodiment of the present invention, the smoke baffle further includes a second baffle, the second baffle is fixedly connected to the inner wall of the second sidewall, the second baffle and the first baffle are offset vertically, and the projections of the second baffle and the first baffle on the horizontal plane have an overlapping portion.

[0013] According to one embodiment of the present invention, the first baffle and the second baffle are in clearance fit with the inner wall of the first sidewall.

[0014] According to one embodiment of the present invention, the smoke baffle further includes a third baffle, the third baffle is fixedly connected to the inner wall of the first sidewall, the third baffle is clearance-fitted to the inner wall of the second sidewall, the third baffle is vertically offset from the first baffle and the second baffle, and the projections of the third baffle and the first baffle on the horizontal plane have overlapping portions.

[0015] According to one embodiment of the present invention, the inner walls of the first sidewall and the second sidewall are fixedly provided with a heat insulation layer.

[0016] According to one embodiment of the present invention, the height of the mounting plate is greater than the thickness of the first baffle.

[0017] The advantages and beneficial effects of this utility model are as follows: The parallel heat exchange tube panel structure of the reheater of this utility model is reasonable. By staggering the adjacent upper and lower rows of heat exchange tubes, the flue gas will be blocked by the heat exchange tube unit when it rises. The flue gas located at the edge of the second side wall will be blocked by the baffle plate, thus avoiding the formation of flue gas corridor and improving the utilization rate of flue gas heat. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the parallel heat exchanger tube panel of the reheater of this utility model;

[0019] Figure 2 yes Figure 1 An explosion diagram;

[0020] Figure 3 yes Figure 1 A sectional view;

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 This is a schematic diagram of the first baffle.

[0023] In the figure: 1. First sidewall; 2. Heat exchange tube unit; 21. Heat exchange tube installation; 3. Connecting bend; 4. Inlet main pipe; 5. Outlet main pipe; 6. Second sidewall; 71. First baffle; 711. Expansion gap; 72. Second baffle; 73. Third baffle; 8. Mounting plate. Detailed Implementation

[0024] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "horizontal," "vertical," "top," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example

[0026] like Figure 1-5 As shown, the reheater parallel heat exchanger tube panel of the embodiment includes two first sidewalls 1 arranged opposite each other and several rows of heat exchanger tubes arranged between the two first sidewalls 1. The heat exchanger tube units 2 of two adjacent heat exchanger tube rows are staggered. The heat exchanger tube units 2 are fixedly connected to the first sidewalls 1, and two adjacent heat exchanger tube units 2 are connected and communicate with each other through a connecting bend 3. It also includes an inlet water main 4 and an outlet water main 5 fixedly connected to the first sidewalls 1. The inlet water main 4 and the outlet water main 5 communicate with the heat exchanger tube units 2. The inlet water main 4, the outlet water main 5, and the connecting bend are arranged outside the first sidewalls 1.

[0027] With this design, the two adjacent rows of heat exchange tube units are staggered, avoiding vertical alignment. When the flue gas rises, it will be blocked by the heat exchange tube units, avoiding the phenomenon of flue gas rising straight up and the formation of flue gas corridors, thereby improving the utilization rate of flue gas.

[0028] According to one embodiment of the present invention, it further includes two second sidewalls 6 arranged opposite to each other, the second sidewalls 6 being fixedly connected to the first sidewall 1, and the second sidewalls 6 and the first sidewall 1 cooperating to enclose a flue gas passage.

[0029] According to one embodiment of the present invention, the heat exchange tube unit 2 adjacent to the second side wall 6 is a heat exchange tube 21, and a smoke baffle is fixedly provided on the inner wall of the second side wall 6 and / or the heat exchange tube 21.

[0030] With this design, since there will always be a gap between the heat exchange tube and the inner wall of the second side wall, no matter how it is designed, it is very easy to form a flue gas corridor. The setting of the baffle plate avoids the phenomenon of forming a flue gas corridor between the heat exchange tube and the inner wall of the second side wall.

[0031] According to one embodiment of the present invention, the wall of the heat exchange tube 21 is fixedly provided with an installation plate 8, and the smoke baffle includes a first baffle 71, which is fixedly connected to the installation plate 8.

[0032] This design achieves the goal of fixing the position of the first baffle.

[0033] According to one embodiment of the present invention, an expansion gap 711 for thermal expansion of the first baffle 71 is provided between the first baffle 71 and the second side wall 6.

[0034] With this design, due to the property of thermal expansion and contraction, the first smoke baffle will inevitably expand when it encounters high-temperature flue gas. If the first smoke baffle is fixedly connected to the second side wall, the expansion of the first smoke baffle will cause the structure to collapse. Therefore, the first smoke baffle is not connected to the second side wall and an expansion gap is provided.

[0035] According to one embodiment of the present invention, the smoke baffle further includes a second baffle 72, which is fixedly connected to the inner wall of the second side wall 6. The second baffle 72 and the first baffle 71 are vertically offset, and the projections of the second baffle 72 and the first baffle 71 on the horizontal plane have an overlapping portion.

[0036] This design avoids the formation of flue gas corridors in the expansion gaps.

[0037] According to one embodiment of the present invention, the first baffle 71 and the second baffle 72 are fitted with the inner wall of the first sidewall 1 with a clearance.

[0038] By designing in this way, the thermal expansion of the first and second baffles can be prevented from affecting the first sidewall.

[0039] According to one embodiment of the present invention, the smoke baffle further includes a third baffle 73, the third baffle 73 is fixedly connected to the inner wall of the first side wall 1, the third baffle 73 is clearance-fitted with the inner wall of the second side wall 6, the third baffle 73 is vertically offset from the first baffle 71 and the second baffle 72, and the projections of the third baffle 73 and the first baffle 71 on the horizontal plane have overlapping portions.

[0040] This design avoids the formation of a flue gas corridor between the first baffle, the second baffle, and the first sidewall.

[0041] According to one embodiment of the present invention, the inner walls of the first sidewall 1 and the second sidewall 6 are fixedly provided with heat insulation layers.

[0042] This design avoids wasting the heat from the flue gas.

[0043] According to one embodiment of the present invention, the height of the mounting plate 8 is greater than the thickness of the first baffle 71.

[0044] With this design, the height of the first baffle can be selected according to the position of the second baffle, and it is also convenient to weld multiple layers to improve the weld strength.

[0045] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A parallel flow heat exchange tube panel for a reheater characterized by, It includes two first sidewalls arranged opposite each other and several rows of heat exchange tubes arranged between the two first sidewalls, with the heat exchange tube units of two adjacent heat exchange tube rows staggered; the heat exchange tube units are fixedly connected to the first sidewalls, and two adjacent heat exchange tube units are connected and communicate with each other through a connecting bend; it also includes an inlet main pipe and an outlet main pipe fixedly connected to the first sidewalls, and the inlet main pipe and outlet main pipe communicate with the heat exchange tube units; the inlet main pipe, outlet main pipe and connecting bend are arranged outside the first sidewalls.

2. The reheater parallel heat exchange tube panel according to claim 1, characterized by, It also includes two opposing second sidewalls, which are fixedly connected to the first sidewall, and the second sidewalls and the first sidewalls cooperate to enclose a flue gas passage.

3. The reheater parallel heat exchange tube panel according to claim 2, characterized by, The heat exchange tube unit adjacent to the second sidewall is for installing heat exchange tubes, and a smoke baffle is fixedly provided on the inner wall of the second sidewall and / or the heat exchange tubes.

4. The parallel flow reheater panel as claimed in claim 3, wherein, The heat exchange tube is fixedly provided with an installation plate, and the smoke baffle includes a first baffle, which is fixedly connected to the installation plate.

5. The reheater parallel heat exchanger tube panel according to claim 4, characterized in that, An expansion gap is provided between the first baffle and the second sidewall for thermal expansion of the first baffle.

6. The reheater parallel heat exchange tube panel according to claim 4 or 5, characterized by, The smoke baffle also includes a second baffle, which is fixedly connected to the inner wall of the second sidewall. The second baffle and the first baffle are offset vertically, and the projections of the second baffle and the first baffle on the horizontal plane have an overlapping portion.

7. The reheater parallel heat exchange tube panel according to claim 6, characterized by The first baffle and the second baffle are fitted with the inner wall of the first sidewall with a clearance.

8. The reheater parallel heat exchange tube panel according to claim 7, characterized by, The smoke baffle also includes a third baffle, which is fixedly connected to the inner wall of the first sidewall and has a clearance fit with the inner wall of the second sidewall. The third baffle is vertically offset from the first and second baffles, and the projections of the third baffle and the first baffle on the horizontal plane overlap.

9. The reheater parallel heat exchange tube panel according to claim 1, characterized by, The inner walls of the first sidewall and the second sidewall are fixedly provided with heat insulation layers.

10. The parallel flow reheater panel as set forth in claim 4 wherein, The height of the mounting plate is greater than the thickness of the first baffle.

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