Water cooling circulation structure of air cooling tower

Abstract

The utility model relates to the technical field of air cooling towers, in particular to a water cooling circulation structure of an air cooling tower. The utility model relates to a water cooling circulation structure of an air cooling tower, which comprises a circulating water inlet pipeline, an air cooling tower, a 7 DEG C water heat exchanger and a water cooling tower, and two groups of water ports of the circulating water inlet pipeline are respectively communicated with a middle inlet of the air cooling tower and a tube pass inlet of the 7 DEG C water heat exchanger. A tube pass outlet of the 7-DEG C water heat exchanger is connected with a liquid inlet of the water cooling tower; circulating water is pre-cooled and cooled through the 7-DEG C water heat exchanger and then cooled again through the water cooling tower, so that equipment of the refrigerating unit is effectively reduced, the operation pressure of the water heat exchanger is reduced, the investment cost is reduced, and the operation safety is improved; the dry backflow waste nitrogen of the cold box can be fed into the water cooling tower through the waste nitrogen pipeline to cool the circulating cooling water, and the effective utilization rate of resources is further improved by fully utilizing the dry backflow gas of the cold box.

Description

Technical Field

[0001] The utility model relates to the technical field of air cooling towers, in particular to a water cooling circulation structure of an air cooling tower. Background Art

[0002] The existing cooling water entering the air cooling tower consists of two parts: the first part is circulating cooling water (0.4MPa.G, 32℃), which comes from the circulating cooling water system and is pressurized to 0.84MPa.G by the cooling water pump and then sent to the middle of the air cooling tower; the second part is low-temperature chilled water, that is, circulating cooling water (0.4MPa.G, 32℃) is sent to the upper part of the water cooling tower, and after pre-heat exchange with the dry reflux gas (dirty nitrogen gas) from the cold box system, it is pressurized to 0.95MPa.G by the chilled water pump and sent to the refrigeration unit to cool down to 10-12℃ again, and then enters the upper part of the air cooling tower. The chilled water coming down from the upper part of the air cooling tower merges with the circulating cooling water entering the middle of the air cooling tower, and continues to flow from top to bottom until the bottom of the air cooling tower, and finally returns to the circulating cooling water system.

[0003] However, the low-temperature chilled water in the second part requires the use of a refrigeration unit, which has a high investment cost. At the same time, the circulating cooling water is pressurized to 0.95MPa.G for heat exchange and cooling, and the operating safety is low. In view of the above situation, technical innovation is carried out based on the existing water-cooling circulation structure of the air-cooling tower. Utility Model Content

[0004] The utility model aims to provide a water cooling circulation structure of an air cooling tower to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a water cooling circulation structure of an air cooling tower, comprising:

[0006] Circulating water inlet pipeline, air cooling tower, 7℃ water heat exchanger and water cooling tower, the two groups of water inlets of the circulating water inlet pipeline are respectively connected with the middle inlet of the air cooling tower and the pipe side inlet of the ℃ water heat exchanger, wherein:

[0007] The tube outlet of the 7°C water heat exchanger is connected to the liquid inlet of the water cooling tower, the liquid outlet of the water cooling tower is connected to the upper inlet of the air cooling tower, the bottom outlet of the air cooling tower is connected to the circulating water return pipeline, the air inlet of the air cooling tower is connected to the air intake pipeline, and the air outlet of the air cooling tower is connected to the air outlet pipeline.

[0008] Preferably, a cooling water pump is connected to the connecting pipeline between the circulating water inlet pipeline and the air cooling tower, and a chilled water pump is connected to the connecting pipeline between the liquid outlet of the water cooling tower and the upper inlet of the air cooling tower.

[0009] Preferably, a cold box is placed on the right side of the water cooling tower, and the cooling gas inlet of the water cooling tower is connected to a dirty nitrogen pipeline.

[0010] Preferably, one end of the dirty nitrogen pipeline away from the water cooling tower is connected to the dirty nitrogen outlet of the cold box, and the cooling water pump is located on the right side of the air cooling tower.

[0011] Preferably, the 7°C water heat exchanger is located on the right side of the cooling water pump, and the circulating water inlet pipeline is located between the cooling water pump and the 7°C water heat exchanger.

[0012] Preferably, the water cooling tower is located on the right side of the 7°C water heat exchanger, and the chilled water pump is located in front of the cooling water pump.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model precools the circulating water through a 7°C water heat exchanger and then cools it again through a water cooling tower, thereby effectively reducing the equipment of the refrigeration unit and reducing the operating pressure of the water heat exchanger, thereby reducing investment costs and improving operational safety;

[0015] The dry reflux contaminated nitrogen gas of the cold box can be sent to the water cooling tower through the contaminated nitrogen pipeline to cool the circulating cooling water. By making full use of the dry reflux gas of the cold box, the effective utilization rate of resources can be improved, further saving energy and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the water cooling cycle structure of an air cooling tower of the utility model;

[0017] Figure 2 This is a top view of a water cooling circulation structure of an air cooling tower of the utility model;

[0018] Figure 3 It is a rear side view of a water cooling circulation structure of an air cooling tower of the utility model.

[0019] In the figure: 1. Circulating water inlet pipeline; 11. Air cooling tower; 12. 7℃ water heat exchanger; 2. Water cooling tower; 21. Circulating water return pipeline; 22. Air inlet pipeline; 23. Air outlet pipeline; 3. Cooling water pump; 31. Chilled water pump; 32. Dirty nitrogen pipeline; 33. Cold box. DETAILED DESCRIPTION

[0020] 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.

[0021] See also Figure 1-Figure 3 A water cooling circulation structure of an air cooling tower comprises a circulating water inlet pipeline 1, an air cooling tower 11, a 7°C water heat exchanger 12 and a water cooling tower 2. Two groups of water inlets of the circulating water inlet pipeline 1 are respectively connected with the middle inlet of the air cooling tower 11 and the pipe inlet of the 7°C water heat exchanger 12. The pipe outlet of the 7°C water heat exchanger 12 is connected with the liquid inlet of the water cooling tower 2. The liquid outlet of the water cooling tower 2 is connected with the upper inlet of the air cooling tower 11. The bottom outlet of the air cooling tower 11 is connected with the circulating water return pipeline 21. The air inlet is connected to an air inlet pipeline 22, and the air outlet of the air cooling tower 11 is connected to an air outlet pipeline 23. The circulating water flows into the 7°C water heat exchanger 12 and the cooling water pump 3 respectively through the circulating water inlet pipeline 1. A part of the circulating water is input into the middle part of the air cooling tower 11 through the cooling water pump 3, and the other part of the circulating water is pre-cooled and cooled through the 7°C water heat exchanger 12, and then cooled again through the water cooling tower 2, thereby effectively reducing the equipment of the refrigeration unit and reducing the operating pressure of the water heat exchanger, thereby reducing the investment cost and improving the operation safety.

[0022] A cooling water pump 3 is connected to the connecting pipeline between the circulating water inlet pipeline 1 and the air cooling tower 11, and a chilled water pump 31 is connected to the connecting pipeline between the liquid outlet of the water cooling tower 2 and the upper inlet of the air cooling tower 11. The cooling water passing through the water cooling tower 2 is pressurized by the chilled water pump 31 and sent to the upper part of the air cooling tower 11 to contact with the circulating water in the middle thereof for cooling. A cold box 33 is placed on the right side of the water cooling tower 2, and a dirty nitrogen pipeline 32 is connected to the cooling gas inlet of the water cooling tower 2. One end of the dirty nitrogen pipeline 32 away from the water cooling tower 2 is connected to the dirty nitrogen outlet of the cold box 33. The dry reflux dirty nitrogen gas of the cold box 33 can be sent into the water cooling tower 2 through the dirty nitrogen pipeline 32 to cool the circulating cooling water, so that resources can be effectively utilized.

[0023] The cooling water pump 3 is located on the right side of the air cooling tower 11, the 7°C water heat exchanger 12 is located on the right side of the cooling water pump 3, the circulating water inlet pipeline 1 is located between the cooling water pump 3 and the 7°C water heat exchanger 12, the water cooling tower 2 is located on the right side of the 7°C water heat exchanger 12, and the chilled water pump 31 is located on the front side of the cooling water pump 3.

[0024] Working principle: Circulating water flows into the 7°C water heat exchanger 12 and the cooling water pump 3 respectively through the circulating water inlet pipeline 1. A part of the circulating water is input into the middle part of the air cooling tower 11 through the cooling water pump 3, and the other part of the circulating water is pre-cooled and cooled through the 7°C water heat exchanger 12, and then cooled again through the water cooling tower 2, thereby effectively reducing the equipment of the refrigeration unit and reducing the operating pressure of the water heat exchanger, thereby reducing investment costs and improving operational safety. The cooling water that has passed through the water cooling tower 2 is pressurized by the chilled water pump 31 and sent to the upper part of the air cooling tower 11 to contact with the circulating water in the middle thereof for cooling. The dry reflux dirty nitrogen gas of the cold box 33 can be sent to the water cooling tower 2 through the dirty nitrogen pipeline 32 to cool the circulating cooling water, so that resources can be effectively utilized.

Claims

1. A water cooling circulation structure of an air cooling tower, characterized in that: include: A circulating water inlet pipeline (1), an air cooling tower (11), a 7°C water heat exchanger (12) and a water cooling tower (2), wherein the two groups of water inlets of the circulating water inlet pipeline (1) are respectively connected to the middle inlet of the air cooling tower (11) and the pipe side inlet of the 7°C water heat exchanger (12), wherein: The pipe outlet of the 7°C water heat exchanger (12) is connected to the liquid inlet of the water cooling tower (2), the liquid outlet of the water cooling tower (2) is connected to the upper inlet of the air cooling tower (11), the bottom outlet of the air cooling tower (11) is connected to the circulating water return pipeline (21), the air inlet of the air cooling tower (11) is connected to the air inlet pipeline (22), and the air outlet of the air cooling tower (11) is connected to the air outlet pipeline (23).

2. The water cooling circulation structure of the air cooling tower according to claim 1 is characterized in that: A cooling water pump (3) is connected to the connecting pipeline between the circulating water inlet pipeline (1) and the air cooling tower (11), and a freezing water pump (31) is connected to the connecting pipeline between the liquid outlet of the water cooling tower (2) and the upper inlet of the air cooling tower (11).

3. The water cooling circulation structure of the air cooling tower according to claim 2 is characterized in that: A cold box (33) is placed on the right side of the water cooling tower (2), and a cooling gas inlet of the water cooling tower (2) is connected to a dirty nitrogen pipeline (32).

4. The water cooling circulation structure of the air cooling tower according to claim 3 is characterized in that: One end of the dirty nitrogen pipeline (32) away from the water cooling tower (2) is connected to the dirty nitrogen outlet of the cold box (33), and the cooling water pump (3) is located on the right side of the air cooling tower (11).

5. The water cooling circulation structure of the air cooling tower according to claim 4 is characterized in that: The 7°C water heat exchanger (12) is located on the right side of the cooling water pump (3), and the circulating water inlet pipeline (1) is located between the cooling water pump (3) and the 7°C water heat exchanger (12).

6. The water cooling circulation structure of the air cooling tower according to claim 5 is characterized in that: The water cooling tower (2) is located on the right side of the 7°C water heat exchanger (12), and the chilled water pump (31) is located in front of the cooling water pump (3).

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