Large-temperature-difference evaporative cooler

Abstract

The utility model relates to the technical field of heat exchangers, and particularly discloses a large-temperature-difference evaporative cooler which comprises a box body frame, a tertiary cooling coil pipe, high-temperature pre-cooling packing, low-temperature pre-cooling packing, an exhaust system and a middle communicating pipe. The three groups of coil pipes are respectively a spray hot coil pipe, an immersion hot coil pipe and a spray cold coil pipe; the spraying hot coil pipe, the immersion hot coil pipe and the spraying cold coil pipe are all arranged in the box body frame, the spraying hot coil pipe is located in a spraying area on the upper portion of the immersion hot coil pipe, and the spraying hot coil pipe and the immersion hot coil pipe are communicated with each other through a middle communicating pipe; the spraying hot coil pipe and the spraying cold coil pipe are located on the two sides of the exhaust system respectively, and the exhaust system is located in the middle of the top of the box frame. The high-temperature pre-cooling filler and the low-temperature pre-cooling filler are respectively positioned below the spraying hot coil pipe and the spraying cold coil pipe; the structure is simple, the cooling effect is good, a large-temperature-difference heat exchange system is simplified, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a large temperature difference evaporative cooler. Background Art

[0002] Evaporative coolers are widely used in various fields such as petrochemicals, thermal power, metallurgy, medicine, construction, HVAC, air conditioning, etc. The cooling temperature difference of traditional evaporative coolers is usually 5℃ or 10℃, and the maximum temperature difference will not exceed 20℃. However, for some special occasions, the temperature drop requirement may exceed 20℃. For example, for the cooling of process fluids such as condensed water or lithium carbonate mother liquor, a large temperature difference must be achieved in view of process requirements or in order to reduce the flow rate while ensuring the heat load. The maximum temperature difference may even reach 80℃. At this time, the traditional evaporative cooler cannot be achieved at one time through a single device. The traditional solution is either to use a mixed water tank or to connect multiple devices in series. No matter which type, it is necessary to configure cooling equipment and water pump groups that are far greater than the system heat load requirements. In this way, the system pipeline is complex, the equipment occupies a large area, the energy consumption is high, it is not easy to control, the investment and operation costs are high, and there is serious energy waste during operation. Utility Model Content

[0003] The purpose of the utility model is to provide a large temperature difference evaporative cooler to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a large temperature difference evaporative cooler, comprising a box frame, a tertiary cooling coil, a high-temperature pre-cooling filler, a low-temperature pre-cooling filler, an exhaust system, and an intermediate connecting pipe, wherein the tertiary cooling coil is composed of three groups of coils, and the three groups of coils are respectively a spray hot coil, an immersion hot coil and a spray cold coil; the spray hot coil, the immersion hot coil, and the spray cold coil are all arranged inside the box frame, wherein the spray hot coil is located in the spray area on the upper part of the immersion hot coil, and the spray hot coil and the immersion hot coil are interconnected by the intermediate connecting pipe; the spray hot coil and the spray cold coil are respectively located on both sides of the exhaust system, and the exhaust system is located in the middle position of the top of the box frame; the high-temperature pre-cooling filler and the low-temperature pre-cooling filler are respectively located below the spray hot coil and the spray cold coil.

[0005] Preferably, the immersion heat coil is arranged inside the high-temperature water collecting tank, and a low-temperature water collecting tank is arranged below the low-temperature pre-cooling filler, and the high-temperature water collecting tank and the low-temperature water collecting tank are both fixedly arranged at the bottom of the box frame.

[0006] Preferably, a water distribution box is provided at the water inlet end of the immersion heat coil, and a water collection box is provided at the water outlet end of the immersion heat coil, and the water collection box is connected to the middle connecting pipe.

[0007] Preferably, a high-temperature side spray pump is arranged at the bottom of the box frame on the same side as the spray heat coil, and a high-temperature side water distribution box is arranged correspondingly on the top of the box frame; the high-temperature side water distribution box is located above the spray heat coil, and a high-temperature side nozzle is arranged on the high-temperature side water distribution box; the high-temperature side water distribution box is connected to the high-temperature side spray pump through a pipe, and the high-temperature side spray pump is connected to the high-temperature water collecting tank.

[0008] Preferably, a low-temperature side spray pump is arranged at the bottom of the box frame on the same side as the spray cold coil, and a low-temperature side water distribution box is arranged correspondingly on the top of the box frame; the low-temperature side water distribution box is located above the spray cold coil, and a low-temperature side nozzle is arranged on the low-temperature side water distribution box; the low-temperature side water distribution box is connected to the low-temperature side spray pump through a pipeline, and the low-temperature side spray pump is connected to the low-temperature water collecting tank.

[0009] Preferably, water collectors are provided on the sides of the spray hot coil and the spray cold coil.

[0010] Compared with the prior art, the beneficial effects of the utility model are: the utility model uses a single device to achieve large temperature difference cooling at one time, has a simple structure and good cooling effect, greatly simplifies the large temperature difference heat exchange system, improves the equipment and system operation efficiency, and saves costs; it can easily solve the problem of large temperature difference working conditions, reduce energy consumption, and avoid unnecessary waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model;

[0012] Numbers in the figure: 1. Spray hot coil; 2. High-temperature pre-cooling filler; 3. High-temperature side spray pump; 4. Water distribution box; 5. Immersed hot coil; 6. High-temperature water collection tank; 7. Water collection box; 8. Low-temperature water collection tank; 9. Low-temperature side spray pump; 10. Low-temperature pre-cooling filler; 11. Box frame; 12. Spray cold coil; 13. Low-temperature side nozzle; 14. Low-temperature side water distribution box; 15. Exhaust system; 16. Intermediate connecting pipe; 17. High-temperature side water distribution box; 18. High-temperature side nozzle; 19. Water collector. DETAILED DESCRIPTION

[0013] 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.

[0014] 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.

[0015] 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.

[0016] See also Figure 1 The utility model provides a technical solution: a large temperature difference evaporative cooler, comprising a box frame 11, a tertiary cooling coil, a high-temperature pre-cooling filler 2, a low-temperature pre-cooling filler 10, an exhaust system 15, and an intermediate connecting pipe 16, wherein the tertiary cooling coil is composed of three groups of coils, and the three groups of coils are respectively a spray hot coil 1, an immersion hot coil 5 and a spray cold coil 12; the spray hot coil 1, the immersion hot coil 5, and the spray cold coil 12 are all arranged inside the box frame 11, wherein the spray hot coil 1 is located in the spraying area on the upper part of the immersion hot coil 5, and the spray hot coil 1 and the immersion hot coil 5 are interconnected by the intermediate connecting pipe 16; the spray hot coil 1 and the spray cold coil 12 are respectively located on both sides of the exhaust system 15, and the exhaust system 15 is located in the middle position of the top of the box frame 11; the high-temperature pre-cooling filler 2 and the low-temperature pre-cooling filler 10 are respectively located below the spray hot coil 1 and the spray cold coil 12.

[0017] Furthermore, the immersion heat coil 5 is arranged inside the high-temperature water collecting tank 6, and a low-temperature water collecting tank 8 is arranged at the lower part of the low-temperature pre-cooling filler 10. The high-temperature water collecting tank 6 and the low-temperature water collecting tank 8 are both fixedly arranged at the bottom of the box frame 11.

[0018] Furthermore, a water distribution box 4 is provided at the water inlet end of the immersion heat coil 5 , and a water collection box 7 is provided at the water outlet end of the immersion heat coil 5 . The water collection box 7 is connected to the intermediate connecting pipe 16 .

[0019] Furthermore, a high-temperature side spray pump 3 is arranged at the bottom of the box frame 11 on the same side as the spray heat coil 1, and a high-temperature side water distribution box 17 is arranged correspondingly on the top of the box frame 11; the high-temperature side water distribution box 17 is located above the spray heat coil 1, and a high-temperature side nozzle 18 is arranged on the high-temperature side water distribution box 17; the high-temperature side water distribution box 17 is connected to the high-temperature side spray pump 3 through a pipeline, and the high-temperature side spray pump 3 is connected to the high-temperature water collecting tank 6.

[0020] Furthermore, a low-temperature side spray pump 9 is arranged at the bottom of the box frame 11 on the same side as the spray cold coil 12, and a low-temperature side water distribution box 14 is correspondingly arranged on the top of the box frame 11; the low-temperature side water distribution box 14 is located above the spray cold coil 12, and a low-temperature side nozzle 13 is arranged on the low-temperature side water distribution box 14; the low-temperature side water distribution box 14 is connected to the low-temperature side spray pump 9 through a pipeline, and the low-temperature side spray pump 9 is connected to the low-temperature water collecting tank 8.

[0021] Furthermore, water collectors 19 are provided on the sides of the spray hot coil 1 and the spray cold coil 12 .

[0022] Working principle: The spray hot coil 1, the immersion hot coil 5 and the spray cold coil 12 together constitute three groups of cooling coils of the evaporative cooler. In the entire cooling process, the three groups of coils operate in series to achieve three-time cooling of the cooling medium.

[0023] The primary cooling is performed in the immersed heat coil 5, which is immersed in the high-temperature water collection tank 6. The cooling medium in the immersed heat coil 5 is cooled from the temperature T1 to the temperature T 11 The spray water in the high temperature water collection tank 6 absorbs heat from the temperature T w1 Heating to T w2 The temperature is T 11 The cooling medium enters the spray heat coil 1 through the intermediate connecting pipe 16 for secondary cooling to T 12 ; At the same time, the temperature is T w2 The spray water is delivered to the high temperature side water distribution box 17 by the high temperature side spray pump 3, and sprayed to the outside of the spray heat coil 1 through the high temperature side nozzle 18, absorbing the heat of the cooling medium in the spray heat coil 1 and heating to T w3 , and then cool down to temperature T in the high temperature pre-cooling filler 2 w1 , completing the high-temperature side spray cycle.

[0024] Temperature is T 12 After leaving the spray hot coil 1, the cooling medium enters the spray cold coil 12 on the other side of the exhaust system 15 for three coolings, and finally cools to the temperature T2, completing the cooling cycle in the tube. The temperature in the low-temperature water collection tank 8 is T w1 ’The spray water is transported to the low temperature side water distribution box 14 by the low temperature side spray pump 9, and then sprayed to the outside of the spray cold coil 12 through the low temperature side nozzle 13, and absorbs heat and rises to T w2 ’ , and then cooled to T by low temperature pre-cooling filler 10 w1 ’ , and then returns to the low-temperature water collection tank 8 to complete the low-temperature side spray cycle.

[0025] 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 large temperature difference evaporative cooler, characterized in that: The invention comprises a box frame (11), a tertiary cooling coil, a high-temperature pre-cooling filler (2), a low-temperature pre-cooling filler (10), an exhaust system (15), and an intermediate connecting pipe (16); the tertiary cooling coil is composed of three groups of coils, the three groups of coils are respectively a spray hot coil (1), an immersion hot coil (5), and a spray cold coil (12); the spray hot coil (1), the immersion hot coil (5), and the spray cold coil (12) are all arranged inside the box frame (11), wherein the spray hot coil (1) is located in the spraying area above the immersion hot coil (5), the spraying hot coil (1) and the immersion hot coil (5) are interconnected by an intermediate connecting pipe (16); the spraying hot coil (1) and the spraying cold coil (12) are respectively located on both sides of the exhaust system (15), and the exhaust system (15) is located in the middle position of the top of the box frame (11); the high-temperature pre-cooling filler (2) and the low-temperature pre-cooling filler (10) are respectively located below the spraying hot coil (1) and the spraying cold coil (12).

2. The large temperature difference evaporative cooler according to claim 1, characterized in that: The immersion heat coil (5) is arranged inside a high-temperature water collecting tank (6), a low-temperature water collecting tank (8) is arranged below the low-temperature pre-cooling filler (10), and the high-temperature water collecting tank (6) and the low-temperature water collecting tank (8) are both fixedly arranged at the bottom of the box frame (11).

3. The large temperature difference evaporative cooler according to claim 1, characterized in that: The water inlet end of the immersion heat coil (5) is provided with a water distribution box (4), the water outlet end of the immersion heat coil (5) is provided with a water collection box (7), and the water collection box (7) is connected to the intermediate connecting pipe (16).

4. The large temperature difference evaporative cooler according to claim 1, characterized in that: A high-temperature side spray pump (3) is arranged at the bottom of the box frame (11) on the same side as the spray heat coil (1), and a high-temperature side water distribution box (17) is correspondingly arranged at the top of the box frame (11); the high-temperature side water distribution box (17) is located above the spray heat coil (1), and a high-temperature side nozzle (18) is arranged on the high-temperature side water distribution box (17); the high-temperature side water distribution box (17) is connected to the high-temperature side spray pump (3) through a pipeline, and the high-temperature side spray pump (3) is connected to the high-temperature water collecting tank (6).

5. The large temperature difference evaporative cooler according to claim 1, characterized in that: A low-temperature side spray pump (9) is arranged at the bottom of the box frame (11) on the same side as the spray cold coil (12), and a low-temperature side water distribution box (14) is correspondingly arranged at the top of the box frame (11); the low-temperature side water distribution box (14) is located above the spray cold coil (12), and a low-temperature side nozzle (13) is arranged on the low-temperature side water distribution box (14); the low-temperature side water distribution box (14) is connected to the low-temperature side spray pump (9) through a pipeline, and the low-temperature side spray pump (9) is connected to the low-temperature water collecting tank (8).

6. The large temperature difference evaporative cooler according to claim 1, characterized in that: The sides of the spray hot coil (1) and the spray cold coil (12) are both provided with water collectors (19).

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