Self-circulation cooling tower

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly discloses a self-circulation cooling tower which comprises a water storage tank, a self-circulation spraying pump, a self-circulation water conveying pipe, an evaporation heat exchange module, a fan system, a mixed heat exchange module and a box frame, the water storage tank is arranged at the bottom of the box frame, and the self-circulation spraying pump is arranged on the side edge of the water storage tank; the evaporation heat exchange modules are symmetrically arranged on the inner side of the box body frame, each evaporation heat exchange module comprises a heat exchange filler, an efficient water collector, a spraying system and a water distribution disc, and a medium-temperature mixed liquid inlet is formed in the upper portion of each water distribution disc; the mixed heat exchange module comprises a high-low temperature water collecting pipe, the high-low temperature water collecting pipe is provided with two water inlets and a water outlet, one water inlet is connected with a water outlet of the self-circulation spraying pump through a self-circulation water pipe, the other water inlet is connected with a high-temperature return water inlet, and the water outlet is connected with a medium-temperature mixed liquid inlet. High-temperature return water from the system and self-circulation water driven by the self-circulation spraying pump firstly enter the high-low temperature water collecting pipe and then enter the water distribution disc.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a self-circulating cooling tower. Background Art

[0002] Open cooling towers are widely used in various fields such as new energy, petrochemical, metallurgy, medicine, HVAC, etc. When the return water temperature is high, the material requirements for the open cooling tower are higher. On the one hand, the temperature resistance requirements are increased, and on the other hand, long-term high-temperature operation also greatly reduces the heat exchange efficiency and service life of the equipment.

[0003] The maximum temperature difference that can be achieved by the existing tower types on the market generally does not exceed 20°C. A high inlet water temperature means that the outlet water temperature will also be high. In addition, if the return water temperature is too high, the evaporation loss will be large, and there will be more white smoke from the exhaust air, which will pollute the environment and waste water resources. Although the traditional solution of adding a system circulation pump and a mixing water tank for multiple links and multiple cooling and heat exchange can solve the above problems to a certain extent, the entire system needs to be adjusted, which occupies a large area, has a complex system, high energy consumption, and high investment and operating costs. Utility Model Content

[0004] The utility model aims to provide a self-circulating cooling tower to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solutions: a self-circulating cooling tower, comprising a water storage tank, a self-circulating spray pump, a self-circulating water pipe, an evaporative heat exchange module, a fan system, a mixed heat exchange module and a box frame, wherein the water storage tank is arranged at the bottom of the box frame, the self-circulating spray pump is arranged on the side of the water storage tank, and the water suction port of the self-circulating spray pump is connected to the outlet of the water storage tank, and the self-circulating spray pump imitates the mode of the closed cooling tower spray pump and adopts a large flow and low head water pump;

[0006] The evaporative heat exchange module is symmetrically arranged on the inner side of the box frame. The evaporative heat exchange module includes a heat exchange filler, a high-efficiency water collector, a spray system and a water distribution tray. The heat exchange filler, the spray system and the water distribution tray are arranged in sequence from bottom to top. A medium-temperature mixed liquid inlet is arranged above the water distribution tray.

[0007] The mixed heat exchange module is arranged above the evaporative heat exchange module. The mixed heat exchange module includes a high and low temperature water collecting pipe. The high and low temperature water collecting pipe is provided with two water inlets and one water outlet. One water inlet is connected to the drain outlet of the self-circulating spray pump through a self-circulating water pipe, and the other water inlet is connected to the high-temperature return water inlet, and the water outlet is connected to the medium-temperature mixed liquid inlet.

[0008] The high-temperature return water from the system and the self-circulating water driven by the self-circulating spray pump first enter the high and low temperature water pipes and then enter the water distribution tray.

[0009] Preferably, a fan system is provided in the middle of the upper part of the box frame, and the fan system is located between the evaporation heat exchange modules.

[0010] Preferably, a low-temperature water outlet is provided on a side of the water storage tank away from the self-circulating spray pump.

[0011] Preferably, a self-circulating sewage outlet and a water outlet sewage outlet are symmetrically arranged below the water storage tank. The self-circulating sewage outlet is located near the self-circulating spray pump, and the water outlet sewage outlet is located near the low-temperature water outlet.

[0012] Preferably, the high-efficiency water collector is arranged on the inner side of the heat exchange filler.

[0013] Preferably, the water storage tank is provided with a water replenishment port.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model uses two heat exchange modules of one device to achieve a large temperature difference of more than 20°C, and reduces the temperature of the cooling water entering the evaporative heat exchange module, thereby improving the efficiency and service life of the evaporative heat exchange module. The temperature reduction of the evaporative heat exchange module means that the evaporation loss is reduced, the white smoke caused by evaporation is reduced, the waste of water resources is reduced, and the structure is simple and the cooling effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the top structure of the utility model.

[0018] In the figure: 1. Water storage tank; 2. Self-circulating sewage outlet; 3. Self-circulating spray pump; 4. Self-circulating water pipe; 5. Heat exchange filler; 6. High-efficiency water collector; 7. Spray system; 8. Water distribution tray; 9. Fan system; 10. Medium-temperature mixed liquid inlet; 11. High-temperature return water inlet; 12. High and low-temperature water collection pipes; 13. Box frame; 14. Low-temperature water outlet; 15. Water outlet and sewage outlet; 16. Water replenishment outlet. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships 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.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-2 The utility model provides a technical solution: a self-circulating cooling tower, comprising a water storage tank 1, a self-circulating spray pump 3, a self-circulating water pipe 4, an evaporative heat exchange module, a fan system 9, a mixed heat exchange module and a box frame 13, wherein the water storage tank 1 is arranged at the bottom of the box frame 13, the self-circulating spray pump 3 is arranged on the side of the water storage tank 1, and the water suction port of the self-circulating spray pump 3 is connected to the outlet of the water storage tank 1, and the self-circulating spray pump 3 imitates the mode of the closed cooling tower spray pump and adopts a large-flow and low-lift water pump.

[0023] Furthermore, the evaporative heat exchange module is symmetrically arranged on the inner side of the box frame 13, and the evaporative heat exchange module includes a heat exchange filler 5, a high-efficiency water collector 6, a spray system 7 and a water distribution tray 8. The heat exchange filler 5, the spray system 7 and the water distribution tray 8 are arranged in sequence from bottom to top, and a medium-temperature mixed liquid inlet 10 is arranged above the water distribution tray 8.

[0024] Furthermore, the hybrid heat exchange module is arranged above the evaporative heat exchange module, and the hybrid heat exchange module includes a high and low temperature water collecting pipe 12, and the high and low temperature water collecting pipe 12 is provided with two water inlets and one water outlet, one water inlet is connected to the drain outlet of the self-circulating spray pump 3 through the self-circulating water supply pipe 4, and the other water inlet is connected to the high-temperature return water inlet 11, and the water outlet is connected to the medium-temperature mixed liquid inlet 10.

[0025] Furthermore, the high-temperature return water from the system and the self-circulating water driven by the self-circulating spray pump 3 first enter the high and low temperature water collection pipe 12 and then enter the water distribution tray 8.

[0026] Furthermore, a fan system 9 is provided in the middle of the upper part of the box frame 13, and the fan system 9 is located between the evaporation heat exchange modules.

[0027] Furthermore, a low-temperature water outlet 14 is provided on one side of the self-circulating spray pump 3 of the water storage tank 1 .

[0028] Furthermore, a self-circulating sewage outlet 2 and a water outlet sewage outlet 15 are symmetrically arranged below the water storage tank 1 . The self-circulating sewage outlet 2 is located near the self-circulating spray pump 3 , and the water outlet sewage outlet 15 is located near the low-temperature water outlet 14 .

[0029] Furthermore, the high-efficiency water collector 6 is arranged on the inner side of the heat exchange filler 5 .

[0030] Furthermore, the water storage tank 1 is provided with a water replenishment port 16 .

[0031] In summary, this device has two heat exchange modules when in use: mixed heat exchange and evaporative heat exchange. The self-circulating water driven by the self-circulating spray pump 3 comes from the water storage tank 1, so the temperature of the self-circulating water is the system water supply temperature T2. The high-temperature return water T1 from the system and the self-circulating water T2 first enter the high and low temperature water conduit 12 for mixed heat exchange, completing the first cooling of the high-temperature return water, and the temperature is reduced to the intermediate mixed liquid T m The medium temperature mixed liquid T after cooling m , enters the water distribution tray 8, and is sprayed on the outside of the heat exchange filler 5 through the spray system 7 for further evaporation and cooling. After the temperature drops to the water supply temperature T2 required by the system, it falls into the water storage tank 1. A part of T2 enters the system through the low-temperature water outlet 14 to absorb heat, and the other part of T2 is pumped into the high and low temperature water collection pipe 12 again by the self-circulating spray pump 3 as the equipment self-circulating water. This cycle repeats, and there is always a part of cooling water in the cooling tower in self-circulation operation.

[0032] The hybrid heat exchange module first reduces the high-temperature return water temperature to a temperature that can be adapted to a conventional open cooling tower, and then achieves a second cooling through the evaporative heat exchange module. This not only widens the heat exchange temperature difference, but also reduces the heat exchange temperature of the evaporative heat exchange module. The equipment has a compact structure, and the self-circulating spray pump 3 imitates the model of the closed cooling tower spray pump, using a large flow and low head water pump, which is relatively low in cost.

[0033] It is worth noting that the entire device is controlled by a main control button. Since the device matched with the control button is a common device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-circulating cooling tower, Features: It comprises a water storage tank (1), a self-circulating spray pump (3), a self-circulating water pipe (4), an evaporative heat exchange module, a fan system (9), a mixed heat exchange module and a box frame (13), wherein the water storage tank (1) is arranged at the bottom of the box frame (13), the self-circulating spray pump (3) is arranged on the side of the water storage tank (1), and the water suction port of the self-circulating spray pump (3) is connected to the outlet of the water storage tank (1); The evaporative heat exchange module is symmetrically arranged on the inner side of the box frame (13), and comprises a heat exchange filler (5), a high-efficiency water collector (6), a spray system (7) and a water distribution tray (8). The heat exchange filler (5), the spray system (7) and the water distribution tray (8) are arranged in sequence from bottom to top, and a medium-temperature mixed liquid inlet (10) is arranged above the water distribution tray (8); The mixed heat exchange module is arranged above the evaporative heat exchange module, and comprises a high and low temperature water collecting pipe (12), wherein the high and low temperature water collecting pipe (12) is provided with two water inlets and a water outlet, wherein one water inlet is connected to the drain outlet of the self-circulating spray pump (3) through a self-circulating water delivery pipe (4), the other water inlet is connected to the high temperature return water inlet (11), and the water outlet is connected to the medium temperature mixed liquid inlet (10).

2. A self-circulating cooling tower according to claim 1, Features: A fan system (9) is provided in the middle of the upper part of the box frame (13), and the fan system (9) is located between the evaporation heat exchange modules.

3. A self-circulating cooling tower according to claim 1, Features: A low-temperature water outlet (14) is provided on a side of the water storage tank (1) away from the self-circulating spray pump (3).

4. A self-circulating cooling tower according to claim 1, Features: A self-circulating sewage outlet (2) and a water outlet sewage outlet (15) are symmetrically arranged below the water storage tank (1); the self-circulating sewage outlet (2) is located near the self-circulating spray pump (3), and the water outlet sewage outlet (15) is located near the low-temperature water outlet (14).

5. A self-circulating cooling tower according to claim 1, Features: The high-efficiency water collector (6) is arranged on the inner side of the heat exchange filler (5).

6. A self-circulating cooling tower according to claim 1, Features: The water storage tank (1) is provided with a water replenishment port (16).

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