Double-inlet cross-flow closed cooling tower with penetrating fin structure

Abstract

The utility model discloses a double air intake cross flow closed cooling tower adopting the fin structure of piece type, including tower body, the left and right sides symmetry of tower body are provided with air intake, and the air intake is installed with air equal flow board, and the inboard of air equal flow board is provided with cold water filling material, piece type fin pipe group and water collector in proper order along the transverse direction, piece type fin pipe group includes light pipe and the multiple piece type fins of equidistance distribution of being sleeved on light pipe, and the outer wall of light pipe is evenly opened multiple annular grooves along the axial direction, and the main body of piece type fin is provided with the multiple pipe holes of matching with the outer diameter of light pipe, and the pipe hole edge is equipped with the convex rib corresponding with the annular groove of light pipe, and the surface of piece type fin is equipped with multiple protuberances. The cooling tower provided by the utility model combines the equal flow design of double air intake with the piece type fin reinforced heat transfer structure, enhances the heat exchange efficiency outside the pipe, and can improve the reliability of the connection of fin and light pipe.

Description

TECHNICAL FIELD

[0001] The utility model relates to a double air inlet cross flow closed cooling tower adopting a through-fin fin structure belongs to the technical field of cooling tower. BACKGROUND

[0002] The closed cooling tower realizes cooling through the indirect heat exchange between the circulating medium in the pipe and the air / spraying water outside the pipe and is widely applied in the fields of electric power, chemical industry and the like. In the prior art, in order to improve the heat exchange area in the closed cooling tower, a fin structure is usually installed on the heat exchange pipe, and it is considered through practice that the prior art still has the following technical problems:

[0003] 1. The single air inlet structure is generally adopted, which can cause uneven air distribution and low local heat exchange efficiency.

[0004] 2. The traditional fin has the problem of limited heat exchange area; the combination strength of the smooth pipe and the traditional fin (such as a winding fin or a rolled fin) is low, the fin is prone to loosening due to vibration or thermal stress, and the heat exchange stability is affected; the heat exchange coefficient outside the pipe depends on the smooth fin, the boundary layer is thick, and the convective heat exchange efficiency is low.

[0005] It can be seen from the above that the prior art obviously has inconvenience and defects in actual use, so it is necessary to improve. CONTENT OF THE UTILITY MODEL

[0006] In view of the deficiencies in the background art, the utility model provides a double air inlet cross flow closed cooling tower adopting a through-fin fin structure, which combines the double air inlet uniform flow design and the through-fin fin heat transfer strengthening structure, enhances the heat exchange efficiency outside the pipe, and can improve the reliability of the connection between the fin and the smooth pipe.

[0007] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0008] A double air inlet cross flow closed cooling tower adopting a through-fin fin structure, comprising a tower body, air inlets are symmetrically arranged on the left and right sides of the tower body, air flow equalizing plates are installed at the air inlets, cold water fillers, through-fin pipe groups and water collectors are sequentially arranged on the inner side of the air flow equalizing plates in the transverse direction; the through-fin pipe group comprises smooth pipes and a plurality of through-fin fins which are equidistantly arranged on the smooth pipes, a plurality of annular grooves are uniformly formed on the outer wall of the smooth pipe in the axial direction, a plurality of pipe holes matched with the outer diameter of the smooth pipe are formed on the main body of the through-fin fin, and a convex rib corresponding to the annular groove of the smooth pipe is arranged at the edge of the pipe hole; a plurality of protrusions are arranged on the surface of the through-fin fin.

[0009] Further, the protrusions are distributed on the periphery of the pipe hole, a plurality of protrusions are distributed in a sawtooth structure along the length direction of the through-fin fin, and a plurality of protrusions are distributed in a wave structure along the width direction of the through-fin fin.

[0010] Further, the protrusions are formed by stamping in a direction perpendicular to the reference plane of the through-plate fin, and the protrusions and the ribs are located on the same side of the reference plane of the through-plate fin.

[0011] Further, a fan is installed at a middle position of the top of the tower body, the fan is communicated with the inner cavity of the tower body, and the fan is used for upward air draft.

[0012] Further, water distribution systems are installed on both sides of the top of the tower body, and the water distribution systems are located above the cold water filler and the through-plate pipe group.

[0013] Further, a water collecting tray is arranged at the bottom of the tower body, and circulating water in the water collecting tray is pumped into the water distribution system by a spraying water pump.

[0014] Further, the light pipe is a horizontally arranged serpentine pipe, one end of the serpentine pipe is connected with the liquid inlet main pipe, the other end of the serpentine pipe is connected with the liquid outlet main pipe, the liquid inlet main pipe and the liquid outlet main pipe are arranged in a vertical direction, and the height of the liquid inlet main pipe is greater than the height of the liquid outlet main pipe.

[0015] Further, the depth of the annular groove is 0.5-1mm.

[0016] Further, the through-plate fin is made of aluminum sheet, the thickness of the through-plate fin is 0.2-0.5mm, and the height of the rib is 0.5-1mm.

[0017] Further, the distance between the through-plate fins is 2-5mm, and the height of the through-plate fin is 10-20mm.

[0018] Compared with the prior art, the above technical scheme has the following advantages:

[0019] The symmetrical double-air-inlet structure can solve the problem of uneven air inlet distribution of the cooling tower, improve the air flow uniformity, and is beneficial to improving the utilization rate of the effective heat exchange area.

[0020] Compared with the traditional winding / rolling, the through-plate fin and the light pipe are designed to be clamped and expanded, the combination strength of the fin and the light pipe is higher, the fin is prevented from loosening in the use process, the through-plate process can be realized by the existing automatic equipment, and the production cost is reduced.

[0021] The sawtooth protrusions arranged on the surface of the through-plate fin can destroy the air boundary layer, enhance the turbulence, increase the heat exchange coefficient outside the pipe by 30%-50%, and reduce the overall energy consumption of the cooling tower by 15%-20%.

[0022] The double-cross-flow heat exchange mode is adopted, the cold water filler and the through-plate pipe group adopt the cross-flow heat exchange mode, the heat exchange path is short, the air resistance is small, and the heat exchange efficiency is high.

[0023] The utility model will be illustrated in detail below in combination with the drawings and embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the structure schematic diagram of the utility model;

[0025] Figure 2 It is the structure schematic diagram of the pipe group of the utility model;

[0026] Figure 3 It is the structure schematic diagram of the pipe group of the utility model;

[0027] Figure 4 It is the assembly sectional view of the light pipe and the pipe group of the utility model;

[0028] Figure 5 It is Figure 4 The structure enlarged view of A place in the middle;

[0029] Figure 6 It is the local enlarged view of the sawtooth protrusion on the pipe group of the utility model.

[0030] In the drawing, 1 - fan, 2 - water distribution system, 3 - cold water filler, 4 - pipe group, 41 - light pipe, 42 - pipe group of the utility model, 43 - liquid inlet main pipe, 44 - liquid outlet main pipe, 45 - pipe hole, 46 - protrusion, 47 - convex rib, 5 - water collector, 6 - spray water pump, 7 - tower body, 8 - water receiving tray. DETAILED DESCRIPTION

[0031] In order to have more clear understanding of the technical features, purposes and effects of the utility model, the specific implementation mode of the utility model will be illustrated in combination with the drawings.

[0032] As Figures 1-6 The utility model provides a kind of double-inlet cross-flow closed cooling tower of pipe group of the utility model structure for the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow of the air flow

[0033] Air flow board 3 is arranged at the air inlet, for evenly distributing the air flow of two sides, to avoid local air flow short circuit.

[0034] The top middle position of tower body 7 is equipped with fan 1, and fan 1 is communicated with the inner chamber of tower body 7, and fan 1 is used to draw air upward.

[0035] The top two sides of tower body 7 are equipped with water distribution system 2, and water distribution system 2 is located above cold water filler 3 and pipe group 4.

[0036] The bottom of the tower body 7 is provided with a water collecting tray 8, circulating water in the water collecting tray 8 is pumped into the water distribution system 2 by the spray water pump 6, and the two sets of water distribution systems 2 share one spray water pump 6.

[0037] The penetrating pipe group 4 comprises a light pipe 41 and a plurality of penetrating fins 42 which are equidistantly arranged on the light pipe 41.

[0038] The light pipe 41 is a horizontally arranged serpentine pipe, one end of the serpentine pipe is connected with the liquid inlet main pipe 43, the other end of the serpentine pipe is connected with the liquid outlet main pipe 44, the liquid inlet main pipe 43 and the liquid outlet main pipe 44 are arranged along the vertical direction, and the height of the inlet end of the liquid inlet main pipe 43 is greater than the height of the outlet end of the liquid outlet main pipe 44.

[0039] The outer wall of the light pipe 41 is uniformly provided with a plurality of annular grooves in the axial direction, and the depth of the annular grooves is 0.5-1mm.

[0040] The penetrating fin 42 is an aluminum sheet with a thickness of 0.2-0.5mm, a plurality of pipe holes 45 matched with the outer diameter of the light pipe 41 are arranged on the main body of the penetrating fin 42, the pipe holes 45 are uniformly distributed, the edge of the pipe hole 45 is provided with a convex rib 47 corresponding to the annular groove of the light pipe 41, and the height of the convex rib 47 is 0.5-1mm.

[0041] The penetrating fin 42 is clamped on the annular groove of the light pipe 41 through the convex rib 47, and then the convex rib 47 is tightly attached to the annular groove through a mechanical pipe expansion process, so that the penetrating fin 42 is prevented from loosening during use.

[0042] The distance between the penetrating fins 42 is 2-5mm, which can be adjusted according to the air flow rate, and the height of the penetrating fin 42 is 10-20mm.

[0043] A plurality of protrusions 46 are arranged on the surface of the penetrating fin 42, the protrusions 46 are distributed on the periphery of the pipe hole 45, the protrusions 46 are arranged in a wave shape along the width direction of the penetrating fin 42, and the protrusions 46 are arranged in a sawtooth shape along the length direction of the penetrating fin 42.

[0044] The protrusions 46 are formed by stamping in the direction perpendicular to the reference surface of the penetrating fin 42, and the protrusions 46 and the convex rib 47 are located on the same side of the reference surface of the penetrating fin 42.

[0045] The specific working principle of the utility model is as follows:

[0046] The utility model discloses a double-side air inlet form, air horizontal flow, and the spray water is sprayed to the tube group 4 on the top through the water distribution system 2, and the flowing cooled material in the tube group 4, and the spray water is sprayed to the surface of the tube group 4, and then gasification evaporates and absorbs the heat in the pipe, so that the material realizes cooling. Through the sheet, the heat exchange area is increased, and the heat exchange outside the pipe is strengthened. The cold water filler 3 is arranged on the air inlet side of the tube group 4, the cold water filler 3 can reduce the spray water temperature, and improve the effective temperature difference of the equipment. The water collector 5 is arranged on the air outlet side of the tube group 4, the water collector 5 collects large water drops to the water pan 8, and the nearly saturated wet air is discharged through the fan 1 after heat exchange, and the spray water that is not evaporated falls back to the water pan 8, and is pumped to the water distribution system 2 at the top through the spray water pump 6 to circulate.

[0047] The utility model discloses a symmetrical double air inlet structure, can solve the problem of uneven air distribution of cooling tower, improve the air flow uniformity, and be favorable for improving the utilization rate of effective heat exchange area.

[0048] The sheet type fin and the smooth pipe in the utility model adopt clamping and expansion pipe design, compared with the traditional winding sheet / rolling sheet, the fin and the smooth pipe have higher combination strength, avoid the fin from loosening in the use process, and the sheet process can be realized through the existing automatic equipment, and production cost is reduced.

[0049] The utility model discloses the sawtooth protrusion on the surface of the sheet type fin, can destroy the air boundary layer, enhance the turbulence, make the heat transfer coefficient of pipe outside improve 30%-50%, and the overall energy consumption of cooling tower reduces 15%-20%.

[0050] The utility model discloses a double horizontal flow heat exchange mode, and the cold water filler and the tube group all adopt horizontal flow heat exchange mode, and the heat exchange path is short, and the wind resistance is small, and the utility model has the characteristics of high heat exchange efficiency.

[0051] The above is the example of the best implementation mode of the utility model, wherein the part not described in detail is the common knowledge of the person skilled in the art. The protection scope of the utility model is accurate with the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A closed-loop cooling tower with dual air inlets and crossflow using a finned structure, characterized in that: The tower body (7) is symmetrically provided with air inlets on the left and right sides. An air flow equalization plate is installed at the air inlet. The inner side of the air flow equalization plate is provided with cold water packing (3), a finned tube assembly (4) and a water collector (5) in sequence along the transverse direction. The finned tube assembly (4) includes a bare tube (41) and multiple finned tubes (42) evenly distributed on the bare tube (41). Multiple annular grooves are uniformly opened on the outer wall of the bare tube (41) along the axial direction. Multiple tube holes (45) matching the outer diameter of the bare tube (41) are opened on the main body of the finned tube (42). The edge of the tube hole (45) is provided with a rib (47) corresponding to the annular groove of the bare tube (41). Multiple protrusions (46) are provided on the surface of the finned tube (42).

2. The closed-loop cooling tower with dual air inlet crossflow and a finned structure as described in claim 1, characterized in that: The protrusions (46) are distributed around the tube hole (45). Along the length of the through-plate fin (42), the protrusions (46) are distributed in a serrated structure, and along the width of the through-plate fin (42), the protrusions (46) are distributed in a wavy structure.

3. A closed-loop cooling tower with a dual-inlet crossflow and finned structure as described in claim 2, characterized in that: The protrusion (46) is formed by stamping along a direction perpendicular to the reference plane of the through-plate fin (42), and the protrusion (46) and the rib (47) are located on the same side of the reference plane of the through-plate fin (42).

4. A closed-loop cooling tower with dual air inlet crossflow and a finned structure as described in claim 1, characterized in that: A fan (1) is installed at the top center of the tower body (7). The fan (1) is connected to the inner cavity of the tower body (7) and is used to draw air upward.

5. A closed-loop cooling tower with dual air inlet crossflow and a finned structure as described in claim 1, characterized in that: Water distribution system (2) is installed on both sides of the top of the tower body (7). The water distribution system (2) is located above the cold water packing (3) and the through-tube assembly (4).

6. A closed-loop cooling tower with a dual-inlet crossflow structure using a through-fin structure as described in claim 5, characterized in that: The bottom of the tower body (7) is provided with a water receiving tray (8), and the circulating water in the water receiving tray (8) is pumped to the water distribution system (2) by the spray water pump (6).

7. A closed-loop cooling tower with dual air inlet crossflow and a finned structure as described in claim 1, characterized in that: The light tube (41) is a horizontally arranged serpentine tube. One end of the serpentine tube is connected to the liquid inlet tube (43), and the other end of the serpentine tube is connected to the liquid outlet tube (44). The liquid inlet tube (43) and the liquid outlet tube (44) are both arranged in the vertical direction, and the height of the inlet end of the liquid inlet tube (43) is greater than the height of the outlet end of the liquid outlet tube (44).

8. A closed-loop cooling tower with dual air inlet crossflow and a finned structure as described in claim 1, characterized in that: The depth of the annular groove is 0.5-1mm.

9. A closed-loop cooling tower with a dual-inlet crossflow structure using a through-fin structure as described in claim 8, characterized in that: The through-plate fin (42) is an aluminum sheet with a thickness of 0.2-0.5 mm, and the rib (47) has a height of 0.5-1 mm.

10. A closed-loop cooling tower with dual air inlet crossflow and a finned structure as described in claim 1, characterized in that: The spacing between the through-plate fins (42) is 2-5mm, and the height of the through-plate fins (42) is 10-20mm.

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