Hyperbolic cooling tower air outlet guide barrier

Abstract

The invention discloses a hyperbolic cooling tower air outlet guide barrier, which is installed on the rigid ring at the top of the hyperbolic cooling tower, and includes a guide module, an inner mounting column, an outer mounting short pipe, and a wind shielding bottom plate. The guide module includes a supporting structure, a mounting circular pipe, a conical plug, and a guide plate. The mounting circular pipe is arranged around the supporting structure, the conical plug is at the lower part of the mounting circular pipe, the inner mounting column is installed on the inner side of the inner guardrail of the rigid ring at the top of the tower, the outer mounting short pipe is installed on the plane of the concrete short wall outside the rigid ring at the top of the tower, the mounting circular pipe is inserted into the inner mounting column and the outer mounting plug, the guide module has uniform specifications, and a plurality of guide modules are continuously installed on the rigid ring at the top of the cooling tower to form a complete annular guide barrier. The hyperbolic cooling tower can be blocked from backflowing into the tower from the ambient air at the air outlet, and has the advantages of simple installation and significant effect.

Description

Technical Field

[0001] The invention relates to an energy-saving technology for improving the efficiency of a cooling tower, and in particular to a hyperbolic cooling tower air outlet guide barrier. Background Art

[0002] The cooling performance of natural ventilation cooling towers is greatly affected by the environment, especially by the environmental side wind. The impact of environmental side wind on the incoming air is to destroy the uniformity of the air temperature field and flow field in the tower, resulting in low central thermal efficiency. It also produces longitudinal vortices and transverse vortices, which weaken the air flow performance and reduce the cooling capacity of the cooling tower. Based on the research results, Chen Youliang and others proposed that the inlet air of the cooling tower is affected by the side wind, and the relative change in cooling efficiency is greater than the ventilation volume, indicating that the reduction in ventilation volume is only one reason for the decline in cooling performance, and another reason is that the side wind destroys the circumferential air intake uniformity of the cooling tower, making the heat and mass transfer intensity uneven in various parts of the tower, and ultimately deteriorating the cooling performance.

[0003] The diameter of the hyperbolic cooling tower gradually increases above the throat to form the airflow outlet diffusion section, and a suddenly expanded maintenance walkway is set on the rigid ring at the top of the hyperbolic cooling tower. When the hot air in the middle of the cooling tower outlet rises, the center temperature of the outlet airflow is higher and the speed is higher, while the surrounding temperature is lower and the airflow speed is lower, forming a suction effect on the surrounding air at the edge of the cooling tower outlet. When there is no crosswind, cold air has already formed an intrusion at the edge of the cooling tower outlet.

[0004] The impact of environmental side wind on the cooling tower outlet mainly destroys the pressure field and flow field environment at the cooling tower outlet. The airflow deflects at the cooling tower outlet to form a vortex flow, which invades the throat, causing the outlet section to decrease, resulting in cold air backflowing into the tower, reducing the effective ventilation area, increasing the air density, and thus reducing the cooling efficiency. Since the cooling tower outlet is higher from the ground, the side wind speed is higher, and the cooling tower outlet radius can reach tens of meters, the impact of side wind on the outlet airflow is very significant.

[0005] The Chinese patent document discloses a "wet cooling tower with an environmental wind guide device", with the authorization announcement number CN203642775 U and the authorization announcement date: 2014.06.11. A plurality of environmental wind guide devices are arranged along the circumference on the outer wall surface at the outlet of the cooling tower. On the one hand, the environmental wind guide device can be used as a guide wind to guide the hot air at the outlet of the cooling tower to strengthen its suction effect. On the other hand, it can also be used as a blocking belt to block the incoming environmental wind on the side to reduce the interference of the lateral environmental wind on the hot air flow field at the outlet of the cooling tower. However, due to the existence of the rigid ring on the top of the cooling tower, the outlet of the wind guide device is blocked, resulting in the failure to guide the hot air at the outlet of the cooling tower. At the same time, the thickness of the hyperbolic cooling tower shell is very thin. Installing a guide device on the outer wall surface at the outlet of the cooling tower will destroy the stability of the shell structure and affect the wind load resistance of the cooling tower. Summary of the invention

[0006] In order to overcome the interference of the ambient side wind on the hot air flow field at the cooling tower outlet, reduce the influence of the side wind on the outlet airflow, and effectively improve the efficiency of the cooling tower, the present invention provides a hyperbolic cooling tower air outlet guide barrier, which can prevent the ambient air from flowing back into the tower and affecting the normal heat exchange of the cooling tower. It also has the advantages of easy installation and low cost.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a hyperbolic cooling tower air outlet diversion barrier, installed on the rigid ring at the top of the hyperbolic cooling tower, including a diversion module, an inner mounting column, an outer mounting short pipe, and a wind shielding bottom plate. The diversion module includes a supporting structure, a mounting circular tube, a conical plug and a diversion plate. The mounting circular tube is arranged around the supporting structure, the conical plug is at the lower part of the mounting circular tube, the inner mounting column is installed on the inner side of the inner guardrail of the rigid ring at the top of the tower, the outer mounting short pipe is installed on the plane of the concrete short wall outside the rigid ring at the top of the tower, the mounting circular tube is inserted into the inner mounting column and the outer mounting plug, the diversion modules have uniform specifications, and multiple diversion modules are continuously installed on the rigid ring at the top of the cooling tower to form a complete circular diversion barrier.

[0008] The closed annular guide barrier is higher than the edge of the rigid ring air outlet at the top of the cooling tower, forming a slow flow space. When there is no side wind, the velocity of the outlet airflow can be alleviated, and the airflow at the top of the barrier is uniform relative to the rigid ring air outlet at the top of the tower, blocking the surrounding ambient air from flowing back into the tower. When there is an ambient side wind, the arc-shaped guide barrier guides the side wind of the cooling tower to change the direction of the airflow, forming an airflow with a higher velocity than the side wind blowing upward along the guide barrier, forming a row of upward airflow screens with strong momentum, which can guide the air around the cooling tower outlet to the upper part of the guide barrier to prevent it from interfering with and damaging the hot air flow field at the outlet of the wet cooling tower.

[0009] The inner mounting column and the outer mounting short tube are provided with mounting plates and stiffening ribs at the bottom, which are installed on the concrete plane by anchor bolts. Nuts are provided on the upper parts of the inner mounting column and the outer mounting short tube, and the mounting round tubes are locked to the inner mounting column and the outer mounting short tube by screws.

[0010] The deflector is an arc-shaped plate, the upper edge of which is inside the rigid ring of the tower top, and the lower edge of which is outside the concrete short wall outside the rigid ring of the tower top. The wind shielding bottom plate is installed between the plane of the concrete short wall and the lower edge of the deflector.

[0011] The deflector is an arc-shaped plate with its lower edge outside the short concrete wall on the outside of the rigid ring at the top of the tower. On the one hand, it can strengthen the guidance of the side wind to change the wind direction, and at the same time reduce the wind pressure on the deflector.

[0012] The invention has the beneficial effects of preventing ambient air from flowing back into the hyperbolic cooling tower from the air outlet, and has the advantages of easy installation, low cost, and significant energy-saving effect and high cost-effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a partial front view structural diagram of an embodiment of the present invention;

[0015] Figure 2 It is a partial top view of the wind outlet diversion barrier;

[0016] Figure 3 This is the front view of the external installation short pipe;

[0017] Figure 4 It is the side view of the external mounting short pipe;

[0018] Figure 5 This is a top view of the external installation short pipe.

[0019] In the figure, 1. guide module, 11. support structure, 12. installation round pipe, 13. conical plug, 14. guide plate, 2. inner installation column, 21. outer installation short pipe, 22. installation plate, 23. stiffening rib, 24. chemical anchor bolt, 25. nut, 26. fastening screw, 3. wind shield bottom plate, 4. tower top rigid ring, 41. walkway, 42. inner guardrail, 43. concrete short wall, 44. outer guardrail. DETAILED DESCRIPTION

[0020] exist Figure 1 , 2In the illustrated embodiment, a hyperbolic cooling tower air outlet guide barrier is installed on a rigid ring (41) at the top of the hyperbolic cooling tower, comprising a guide module (1), an inner mounting column (2), an outer mounting short pipe (21), and a wind shielding bottom plate (3). The guide module (1) comprises a supporting structure (11), a mounting circular pipe (12), a conical plug (13), and a guide plate (14). The mounting circular pipe (12) is arranged around the supporting structure (11). The conical plug (13) is disposed on the mounting circular pipe. At the lower part of the pipe (12), the inner mounting column (2) is mounted on the inner side of the inner guardrail (42) of the concrete walkway (41) of the rigid ring (4) at the top of the tower, the outer mounting short pipe (21) is mounted on the upper plane of the concrete short wall (43) outside the rigid ring (4) at the top of the tower, the mounting circular pipe (12) is inserted into the inner mounting column (2) and the outer mounting plug pipe (21), the flow guide modules (1) have uniform specifications, and a plurality of flow guide modules (1) are continuously mounted on the rigid ring (4) at the top of the cooling tower to form a complete circular flow guide barrier.

[0021] The guide plate (14) is an arc-shaped plate, the upper edge of which is inside the rigid ring (4) at the top of the cooling tower, and the lower edge of which is outside the concrete short wall (43) outside the rigid ring (4) at the top of the tower. The wind shielding bottom plate (3) is installed between the plane of the concrete short wall (43) and the lower edge of the guide plate (14).

[0022] exist Figure 3 , 4 In the embodiment shown in , 5, a mounting plate (22) and a stiffening rib (23) are provided at the bottom of the inner mounting column (2) and the outer mounting short tube (21), and they are mounted on a concrete plane by means of chemical anchor bolts (24). Nuts (25) are welded to the upper parts of the inner mounting column (2) and the outer mounting short tube (21), and the mounting circular tube (12) is locked to the inner mounting column (2) and the outer mounting short tube (21) by means of tightening screws (26).

[0023] It should be understood that various changes may be made to the above embodiments without departing from the scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A hyperbolic cooling tower air outlet guide barrier, installed on the rigid ring at the top of the hyperbolic cooling tower, includes a guide module, an inner mounting column, an outer mounting short pipe, and a wind shielding bottom plate, and is characterized by: The guide module includes a supporting structure, a mounting circular tube, a conical plug and a guide plate. The mounting circular tube is arranged around the supporting structure, the conical plug is at the lower part of the mounting circular tube, the inner mounting column is installed on the inner side of the inner guardrail of the rigid ring at the top of the tower, the outer mounting short tube is installed on the plane of the concrete short wall outside the rigid ring at the top of the tower, and the mounting circular tube is inserted into the inner mounting column and the outer mounting short tube; the guide plate is an arc-shaped plate, the upper edge of which is inside the rigid ring at the top of the tower, and the lower edge is outside the concrete short wall outside the rigid ring at the top of the tower; the specifications of the guide modules are unified, and multiple guide modules are continuously installed on the rigid ring at the top of the cooling tower to form a complete circular guide barrier.

2. The hyperbolic cooling tower air outlet guide barrier according to claim 1 is characterized in that: The inner mounting column and the outer mounting short tube are provided with mounting plates and stiffening ribs at the bottom, which are installed on the concrete plane by anchor bolts. Nuts are provided on the upper parts of the inner mounting column and the outer mounting short tube, and the mounting round tubes are locked to the inner mounting column and the outer mounting short tube by screws.

3. The hyperbolic cooling tower air outlet guide barrier according to claim 1 is characterized in that: The wind shield bottom plate is installed between the plane of the concrete short wall and the lower edge of the guide plate.

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