Large-temperature-difference direct cooling equipment

Abstract

The utility model discloses large-temperature-difference direct cooling equipment, which belongs to the technical field of conveying equipment and comprises a cooling tower, the upper end of the cooling tower is communicated with a water inlet pipeline, a water collecting tank is arranged at the bottom of the cooling tower, a water sprinkling basin is arranged at the upper end in the cooling tower, and water in the water inlet pipeline is uniformly sprinkled through the water sprinkling basin. The water collecting tank exchanges heat with air entering the cooling tower from the bottom, so that cooling is realized, and the water collecting tank is communicated with a water outlet pipeline; the water inlet pipeline and the water outlet pipeline are further communicated through a branch pipeline, a circulating pump is arranged on the branch pipeline, and part of water in the water outlet pipeline is pumped into the water inlet pipeline through the circulating pump, so that water in the water inlet pipeline and water in the water outlet pipeline are mixed. The purpose of large-temperature-difference operation of high-temperature water inlet and low-temperature water outlet can be achieved, meanwhile, the design is an optimized pipeline structure, and the cooling tower can be suitable for various cooling towers.

Description

Technical Field

[0001] The utility model relates to the technical field of conveying equipment, in particular to a large temperature difference direct cooling equipment. Background Art

[0002] The cooling tower is an efficient and environment-friendly cooling equipment, which is widely used in the industrial field. In addition to the temperature difference working condition of five degrees required by the national standard, in recent years, more customers need cooling equipment with a large temperature difference. At present, the common solution is to add a cooling equipment to reduce the high-temperature fluid to an intermediate temperature and shorten the temperature difference operation. As Figure 1 shown, it is the structure of the secondary cooling tower. This structure needs to add an air cooler as an auxiliary cooling equipment. Due to the limited space inside the tower, it can only be modified outside the tower; additionally, pipelines need to be designed separately. The equipment occupies a large space, the applicable flow rate for large temperature difference cooling is small, the structure of the tower body is small, and adding cooling equipment leads to an increase in the cost ratio and a large increase in the overall machine cost.

[0003] The structure of the common cooling tower, as Figure 2 shown, is a structure form with air intake from the lower side and spray water from the upper side for cooling. This structure has a large water treatment capacity range, a small treatment temperature difference, a simple structure, and a small floor area. It is suitable for dealing with small temperature difference scenarios and has insufficient ability to handle existing large temperature differences.

[0004] In view of the above disadvantages of the related technologies, the utility model provides a large temperature difference direct cooling equipment to solve the above problems. Content of the Utility Model

[0005] The utility model aims at the deficiencies existing in the prior art and provides a large temperature difference direct cooling equipment.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] A large temperature difference direct cooling equipment includes a cooling tower. The upper end of the cooling tower is connected with a water inlet pipeline. A water collecting pool is arranged at the bottom of the cooling tower. A sprinkling basin is arranged at the upper end inside the cooling tower. The water in the water inlet pipeline is evenly sprinkled through the sprinkling basin and exchanges heat with the air entering the cooling tower from the bottom to achieve cooling. The water collecting pool is connected with a water outlet pipeline; the water inlet pipeline and the water outlet pipeline are also connected through a branch pipeline. A circulating pump is arranged on the branch pipeline. The circulating pump pumps part of the water in the water outlet pipeline into the water inlet pipeline to realize the mixing of the water in the water inlet pipeline and the water in the water outlet pipeline.

[0008] Furthermore, it further includes a pipeline dynamic mixer. The pipeline dynamic mixer is arranged behind the intersection point of the water inlet pipeline and the branch pipeline. The pipeline dynamic mixer is used to fully mix the water with different temperatures entering from its front end inside the pipeline mixer to achieve a balanced temperature.

[0009] By adopting the above technical solution, the water in the water inlet pipeline and the water in the branch pipeline can be more fully mixed.

[0010] Furthermore, a check valve is connected to the branch pipeline.

[0011] By adopting the above technical solution, the one-way flow of the pipeline is ensured, and the hot water in the water inlet pipeline is prevented from flowing into the water outlet pipeline without cooling.

[0012] Furthermore, a butterfly valve is connected to the branch pipeline.

[0013] By adopting the above technical solution, it is convenient to adjust the amount of mixed water.

[0014] Furthermore, a fan is provided at the upper end of the cooling tower.

[0015] By adopting the above technical solution, the heat exchange effect of the cooling tower is improved.

[0016] Furthermore, packing is also provided in the cooling tower.

[0017] By adopting the above technical solution, the heat exchange effect of the cooling tower is improved.

[0018] In summary, compared with the prior art, the beneficial effects of the above technical solution are as follows:

[0019] (1) When the cooling tower operates, the water inlet pipeline and the water outlet pipeline are mixed through a circulation pump and a pipeline dynamic mixer. After mixing, the inlet water temperature drops from high-temperature water to medium-temperature water and then enters the sprinkling basin. Then, the water is evenly sprinkled on the packing through the sprinkling basin, achieving the purpose of operating with a large temperature difference between high-temperature inlet water and low-temperature outlet water. At the same time, this design optimizes the pipeline structure and can be applied to various cooling towers, such as cross-flow open towers and cross-flow closed towers; among them, 75°C to 90°C is high-temperature water, 50°C to 75°C is medium-temperature water, and 30°C to 50°C is low-temperature water;

[0020] (2) When installing this structure, only the water inlet pipeline and the water outlet pipeline need to be installed, which improves the installation convenience and reduces the installation cost. Moreover, compared with the traditional method of adding an additional cooling device, this solution only changes the pipeline structure, greatly reducing the floor area and the investment in equipment;

[0021] (3) In this solution, the high-temperature water in the water inlet pipeline is mixed with the low-temperature water in the water outlet pipeline. After stabilization, the entire device is in a dynamic equilibrium state, the system operates stably, and the outlet water temperature is stable;

[0022] (4) In addition to achieving a small temperature difference reduction of 5 to 10°C for a conventional tower, this solution can also handle various large temperature difference reductions. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of a secondary cooling cooling tower in the background art;

[0024] Figure 2 is a schematic structural diagram of a commonly used cooling tower structure in the background art, with a structure of lower side air intake and upper side spray water cooling;

[0025] Figure 3 is a schematic overall structure diagram of an embodiment of the present invention.

[0026] Explanation of reference numerals: 1, cooling tower; 2, sprinkler basin; 3, packing; 4, sump; 5, outlet pipeline; 6, inlet pipeline; 7, pipeline dynamic mixer; 8, butterfly valve; 9, circulation pump; 10, check valve; 11, fan. Specific embodiments

[0027] The principles and features of the present invention will be described below in conjunction with all the drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0028] An embodiment of the present invention discloses a large temperature difference direct cooling device.

[0029] Referring to Figures 1-3 , a large temperature difference direct cooling device includes a cooling tower 1. A fan 11 is provided at the top of the cooling tower 1. A sprinkler basin 2 is provided in the upper part of the cooling tower 1. A packing 3 is provided in the cooling tower 1. The sprinkler basin 2 is located above the packing 3. A sump 4 is provided at the bottom of the cooling tower 1. The cooling tower 1 is connected with an inlet pipeline 6 and an outlet pipeline 5. One end of the outlet pipeline 5 is connected to the sump 4 at the bottom of the cooling tower 1. After heat exchange in the cooling tower 1, low-temperature water (condensate) enters the sump 4 for storage. The low-temperature water in the sump 4 enters the outlet pipeline 5 for recycling. The inlet pipeline 6 and the outlet pipeline 5 are connected through a branch pipeline. The water in the inlet pipeline 6 is high-temperature water. A circulation pump 9 and a pipeline dynamic mixer 7 are connected to the branch pipeline. The circulation pump 9 pumps part of the water in the outlet pipeline 5 into the inlet pipeline 6 to realize the mixing of the water in the inlet pipeline 6 and the water in the outlet pipeline 5. The pipeline dynamic mixer 7 is arranged behind the intersection point of the inlet pipeline 6 and the branch pipeline to make the water in the inlet pipeline 6 and the water in the branch pipeline mix more fully. A butterfly valve 8 and a check valve 10 are respectively connected to the branch pipeline. The check valve 10 ensures the one-way flow of the pipeline and prevents the hot water in the inlet pipeline 6 from flowing into the outlet pipeline 5 without cooling, while the butterfly valve 8 is convenient for adjusting the mixing water volume.

[0030] Such as Figure 3As shown, the high-temperature water in the water inlet pipe 6 and the low-temperature water in the water outlet pipe 5 are mixed by the circulation pump 9 and the pipeline dynamic mixer 7 to form medium-temperature water, achieving the operation with a large temperature difference between high-temperature inlet water and low-temperature outlet water. After stabilization, the entire device is in a dynamic equilibrium state, the system operates stably, and the outlet water temperature is stable. The structure of this solution can achieve the purpose of saving floor space, optimizing costs, and reducing construction costs. At the same time, this design optimizes the pipeline structure and can be applied to various cooling towers 1. The medium-temperature water formed after mixing enters the sprinkling basin, and the medium-temperature water is sprinkled onto the packing 3 through the sprinkling basin 2.

[0031] As the air humidity increases, when the air on the water-vapor contact surface reaches saturation, water molecules cannot evaporate. At this time, the fan 11 at the top of the cooling tower 1 needs to play a role in sending the hot and humid air to a high altitude to prevent backflow and continuously sucking dry air from the bottom of the cooling tower 1 to provide a constant dry air flow.

[0032] The connection between the water inlet pipe 6 and the water outlet pipe 5 is arranged at the lower part of the cooling tower 1. During installation of this structure, only the water inlet pipe 6 and the water outlet pipe 5 need to be installed, which improves the installation convenience, reduces the installation cost. Moreover, compared with the traditional method of adding an additional cooling device, this solution only changes the pipeline structure, greatly reducing the floor space and the investment in equipment.

[0033] When the cooling tower 1 operates, the water inlet pipe 6 and the water outlet pipe 5 are mixed through the circulation pump 9 and the pipeline dynamic mixer 7. After mixing, the inlet water temperature drops from high-temperature water to medium-temperature water and then enters the sprinkling basin 2. Then, the water is evenly sprinkled on the packing 3 through the sprinkling basin 2, achieving the purpose of operating with a large temperature difference between high-temperature inlet water and low-temperature outlet water. At the same time, this design optimizes the pipeline structure and can be applied to various cooling towers 1, such as cross-flow open towers and cross-flow closed towers;

[0034] In addition to achieving a small temperature difference reduction of 5 - 10 °C in a conventional tower, this solution can also handle various large temperature difference reductions.

[0035] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A large temperature difference direct cooling device, comprising a cooling tower (1), wherein the upper end of the cooling tower (1) is connected to a water inlet pipeline (6), a water collecting pool (4) is provided at the bottom of the cooling tower (1), a water sprinkling basin (2) is provided at the upper end of the cooling tower (1), water in the water inlet pipeline (6) is evenly sprinkled through the water sprinkling basin (2) and exchanges heat with air entering the cooling tower (1) from the bottom to achieve cooling, characterized in that: The water collecting tank (4) is connected to a water outlet pipeline (5); the water inlet pipeline (6) and the water outlet pipeline (5) are also connected via a branch pipeline, and a circulation pump (9) is provided on the branch pipeline. The circulation pump (9) pumps part of the water in the water outlet pipeline (5) into the water inlet pipeline (6), thereby mixing the water in the water in the water inlet pipeline (6) and the water in the water outlet pipeline (5).

2. A large temperature difference direct cooling device according to claim 1, characterized in that: It also comprises a pipeline dynamic mixer (7), wherein the pipeline dynamic mixer (7) is arranged behind the intersection of the water inlet pipeline (6) and the branch pipeline.

3. The large temperature difference direct cooling device according to claim 1 is characterized in that: A check valve (10) is also provided on the branch pipeline.

4. The large temperature difference direct cooling device according to claim 1 is characterized in that: The branch pipeline is also provided with a butterfly valve (8).

5. The large temperature difference direct cooling device according to claim 1 is characterized in that: A fan (11) is provided at the upper end of the cooling tower (1).

6. The large temperature difference direct cooling device according to claim 1 is characterized in that: Filling (3) is also provided in the cooling tower (1).

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