Closed air cooling tower cooling exhaust system

Abstract

The utility model discloses a closed type air cooling tower cooling exhaust system which comprises an air cooling tower, circulating water in the air cooling tower circulates to a water cooling tower through a water return pipe, a water supply pipe and a water supply pump for cooling circulation treatment, and the water return pipe conveys the circulating water in the air cooling tower to a chemical open type water cooling tower through a water return auxiliary pipe to exhaust dissolved gas. Circulating water is introduced into the open type water cooling tower through the water return auxiliary pipe to discharge dissolved gas, and the control valve and the efficient filtering device are arranged, so that the problem of dissolved gas of a circulating water system is effectively solved, pipeline corrosion and water pump cavitation are prevented, and the service life of the circulating water system is prolonged. Meanwhile, the filtering effect and the operation stability of the system are improved.

Description

Technical Field

[0001] This utility model relates to the field of air separation closed air-cooled towers, specifically to a closed air-cooled tower cooling and exhaust system. Background Technology

[0002] In the precooling system of the air separation plant, when the rising air in the air-cooled tower exchanges heat with the downstream circulating water sprayed from the water supply pipe, some of the air is absorbed by the circulating water and dissolved into the circulating water system (e.g., Figure 3 (As shown). This phenomenon leads to two main technical problems: First, when air dissolved in the water comes into contact with carbon steel pipes, a chemical reaction occurs to generate ferrous oxide. This chemical reaction causes slow and continuous corrosion of the pipes, severely affecting their service life. Second, the gas accumulated inside the pipes causes cavitation in the water pump. This cavitation not only reduces the pump's operating efficiency but also causes mechanical damage to the pump structure, seriously affecting the normal operation and stability of the equipment. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a closed-loop air-cooled tower cooling and exhaust system.

[0004] This utility model is achieved through the following technical solution:

[0005] A closed-loop air-cooled tower cooling and exhaust system includes an air-cooled tower. The circulating water inside the air-cooled tower is circulated to a water-cooled tower for cooling and circulation treatment through a return water pipe, a supply water pipe, and a supply water pump. The return water pipe transports the circulating water inside the air-cooled tower to an open-type cooling tower for chemical production to discharge dissolved gases through a return water auxiliary pipe. The open-type cooling tower is pressurized by a circulation pump and transported along the circulation water pipe to the supply water pipe for recycling.

[0006] Alternatively, control valves may be installed on the water supply pipe, return pipe, return auxiliary pipe, and circulating water pipe.

[0007] Alternatively, an inclined filter box may be installed at the front end of the inlet of the lower circulating pump of the open cooling tower.

[0008] Further optionally, the filter box includes a strip-shaped box body arranged along the open cooling tower and open at the top, with several adjacent unit boxes inserted inside the strip-shaped box body, and each unit box body is provided with a mesh sponge layer.

[0009] Alternatively, the strip-shaped enclosures and unit enclosures may be made of a rigid non-metallic mesh skeleton material.

[0010] Alternatively, the unit housing extends to the outside of the strip housing and is connected to a handle.

[0011] Compared with existing technologies, the advantages of this utility model are: by setting up a return water secondary pipe to introduce circulating water into an open cooling tower to discharge dissolved gases, and by equipping it with a control valve and a high-efficiency filtration device, this utility model effectively solves the problem of dissolved gases in the circulating water system, prevents pipe corrosion and water pump cavitation, and improves the filtration effect and operational stability of the system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the filter box installation for an open-type cooling tower;

[0014] Figure 3 This is a schematic diagram of the prior art of this utility model;

[0015] In the diagram: 1. Air-cooled tower; 2. Water-cooled tower; 3. Water supply pipe; 4. Water supply pump; 5. Return water pipe; 6. Return water auxiliary pipe; 7. Open cooling tower; 8. Circulating water pipe; 9. Circulating pump; 10. Filter box; 11. Strip box; 12. Unit box; 13. Handle. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0017] like Figure 1-2 As shown, this application proposes a closed-loop air-cooled tower cooling and exhaust system, including an air-cooled tower. The circulating water inside the air-cooled tower is circulated to a water-cooled tower for cooling and circulation treatment through a return water pipe, a supply water pipe, and a supply water pump. The return water pipe transports the circulating water inside the air-cooled tower to an open-type cooling tower for chemical production to discharge dissolved gases through a return water auxiliary pipe. The open-type cooling tower is pressurized by a circulation pump and transported along the circulation water pipe to the supply water pipe for recycling.

[0018] The air-cooled tower adopts a closed structure with an internal circulating water system. The return water pipe and the supply water pipe form a circulation loop, with the supply water pump providing the circulation power. A secondary return water pipe connects the return water pipe to the open cooling tower, used to divert a portion of the circulating water. The open cooling tower itself has a fan exhaust structure at the top, and the circulating pump returns the treated water to the supply water pipe through the circulating water pipe. The secondary return water pipe can be connected to the return water system in parallel or series. The open cooling tower can be either a packed or spray type structure, and the circulating pump can be a centrifugal pump or an axial flow pump. The circulating water pipe can be straight or bent, with the pipe diameter determined according to the flow rate requirements.

[0019] This technical solution effectively solves the problem of air accumulation in the circulating water system by setting up a return water branch pipe and an open cooling tower to divert circulating water containing dissolved air to an open environment for gas release. Specifically, the air absorbed by the circulating water in the air-cooled tower is introduced into the open cooling tower through the return water branch pipe and naturally precipitates under normal pressure, avoiding gas accumulation in the closed system. This reduces the corrosive effect of circulating water on the pipelines and lowers the risk of cavitation in the water supply pump. Compared with existing technologies, this system achieves effective removal of dissolved gases without affecting the operation of the main circulation system, improving the reliability of equipment operation.

[0020] Furthermore, this application also proposes that control valves be installed on the water supply pipe, return pipe, return auxiliary pipe and circulating water pipe.

[0021] By installing control valves in key pipelines, the flow distribution of each part of the system can be precisely adjusted. Specifically, the supply water control valve regulates the flow rate of cooling water entering the air-cooled tower; the return water control valve controls the amount of water returning to the water-cooled tower; the return water auxiliary pipe control valve adjusts the proportion of circulating water diverted to the open cooling tower; and the circulating water control valve regulates the amount of water returning from the open cooling tower to the system. This achieves refined control of the system's water circulation, ensuring the effective removal of dissolved gases while maintaining a stable water circulation balance.

[0022] Furthermore, this application proposes installing an inclined filter box at the inlet of the circulating pump in the lower part of the open cooling tower. The filter box is primarily used because the open cooling tower can cause a decline in the quality of the circulating water entering the closed air-cooled tower. Pre-filtration of the water entering the circulating pump is necessary to prevent impurities from entering the pump body and the air-cooled tower. Specifically, the filter box can be installed at an incline, utilizing gravity to achieve a self-cleaning effect as the water flows through the filter medium. The filter medium can be a multi-layered mesh structure, and the inclination angle of the filter box can be designed to be 30-45 degrees, ensuring filtration effectiveness while avoiding excessive water flow resistance.

[0023] Specifically, the filter box comprises a strip-shaped box arranged along an open cooling tower, with an open top. Several adjacent unit boxes are inserted inside the strip-shaped box, each unit box containing a mesh sponge layer. The strip-shaped box and unit boxes are made of a rigid non-metallic mesh skeleton material. The unit boxes extend to the outside of the strip-shaped box and are connected to handles. This allows for a modular design of the filter box, facilitating maintenance and replacement. The unit boxes can adopt a drawer-type structure, allowing for easy removal for cleaning or replacement via the handles. The mesh sponge layer can be made of a combination of materials with different pore densities to create a gradient filtration effect. The rigid non-metallic material can be engineering plastics or fiberglass, which are corrosion-resistant and lightweight.

[0024] This technical solution effectively solves the problem of impurities in circulating water damaging the pump body by setting up an inclined filter box. The inclined design of the filter box reduces maintenance difficulty, and the modular structure improves maintenance efficiency. The filter components made of non-metallic materials avoid metal corrosion problems and extend the service life of the equipment. Compared with existing technologies, this solution significantly reduces system maintenance costs and improves operational reliability while ensuring filtration effectiveness.

[0025] Furthermore, this application also proposes that the filter box includes a strip-shaped box body arranged along the open cooling tower and open at the top, with several adjacent unit boxes inserted inside the strip-shaped box body, and each unit box body is provided with a mesh sponge layer.

[0026] Specifically, the strip-shaped enclosure features a top-opening design for easy installation and maintenance of the unit enclosures. The unit enclosures are fixed inside the strip-shaped enclosure via a plug-in connection, forming a tight connection between adjacent unit enclosures. The mesh sponge layer is made of polyurethane material with adjustable porosity, effectively intercepting solid particles in the circulating water. As a preferred embodiment, the unit enclosure can adopt a drawer-type structure for easy removal for cleaning or replacement. Furthermore, waterproof sealing strips can be installed at the opening edges of the strip-shaped enclosure to prevent water leakage.

[0027] Therefore, this technical solution achieves multi-stage filtration in a circulating water system through a modularly designed filter box structure. The strip-shaped box provides a stable installation base, the unit boxes allow for quick replacement of filter units, and the mesh sponge layer effectively removes impurities from the water. Compared with existing technologies, this structure solves the problem of difficult maintenance of traditional fixed filters, while the detachable design extends the service life of the filter material and reduces system operating costs.

[0028] Furthermore, this application also proposes that the strip-shaped box and the unit box are made of rigid non-metallic mesh skeleton material.

[0029] Specifically, the rigid non-metallic mesh skeleton material can be selected from engineering plastics such as glass fiber reinforced plastics, polypropylene, or polyvinyl chloride. Glass fiber reinforced plastics possess high mechanical strength and corrosion resistance, enabling them to withstand the water pressure impact of circulating water systems; polypropylene exhibits good chemical stability and lightweight properties; while polyvinyl chloride offers excellent weather resistance and cost advantages. As another implementation method, carbon fiber composite materials can be used to fabricate the mesh skeleton, which maintains structural strength while being lighter in weight. The preferred pore size of the mesh structure in the unit housing is 2-5 mm, ensuring both water flow permeability and effective impurity interception.

[0030] Therefore, this technical solution solves the problem of easy corrosion of metal materials in circulating water systems by using rigid non-metallic materials to construct the filter structure. The non-metallic material completely avoids electrochemical reactions with dissolved oxygen, fundamentally eliminating the risk of pipe corrosion. Furthermore, the mesh skeleton structure ensures filtration effectiveness without creating excessive resistance to water flow, maintaining the system's circulation efficiency. Compared to traditional metal filter devices, this design significantly extends equipment lifespan, reduces maintenance costs, and maintains excellent filtration performance. In practical implementation, different material combinations can be selected based on water quality conditions; for example, glass fiber reinforced plastics are preferred in highly corrosive environments.

[0031] Furthermore, this application also proposes that the unit housing extends to the outside of the strip housing and is connected to a handle.

[0032] Specifically, the connection between the unit housing and the handle facilitates gripping by the operator. The length of the unit housing extending beyond the strip housing can be adjusted according to actual needs, typically controlled within the range of 5-15 cm, ensuring both operational convenience and maintaining overall structural stability. The handle can be located on the top or side of the unit housing, with the specific location determined based on the available installation space.

[0033] Therefore, this technical solution makes filter box maintenance more convenient by extending the unit housing and connecting it to the handle. When cleaning or replacing the unit housing is required, the operator can directly pull the unit housing out of the strip housing using the handle, without the need for additional tools. This design effectively solves the problem of difficult disassembly of traditional fixed filter units, especially in space-constrained working environments, significantly improving equipment maintenance efficiency. At the same time, the rigid connection between the extended unit housing and the handle ensures the structural stability of the filter unit during operation, preventing displacement or loosening caused by water flow impact.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A closed-loop air-cooled tower cooling and exhaust system, comprising an air-cooled tower (1), wherein circulating water inside the air-cooled tower (1) is circulated to a water-cooled tower (2) via a return water pipe (5), a supply water pipe (3), and a supply water pump (4) for cooling circulation treatment, characterized in that: The return water pipe (5) transports the circulating water inside the air-cooled tower (1) to the chemical open cooling tower (7) to discharge dissolved gas through the return water auxiliary pipe (6). The open cooling tower (7) is pressurized by the circulating pump (9) and transported along the circulating water pipe (8) to the water supply pipe (3) for recycling.

2. The closed-loop air-cooled tower cooling and exhaust system according to claim 1, characterized in that: Control valves are installed on the water supply pipe (3), return pipe (5), return auxiliary pipe (6), and circulating water pipe (8).

3. The closed-loop air-cooled tower cooling and exhaust system according to claim 1, characterized in that: The open-type cooling tower (7) has an inclined filter box (10) installed at the front end of the inlet of the lower circulation pump (9).

4. The closed-loop air-cooled tower cooling and exhaust system according to claim 3, characterized in that: The filter box (10) includes a strip box (11) arranged along the open cooling tower (7) and open at the top. Several adjacent unit boxes (12) are inserted inside the strip box (11), and each unit box (12) is provided with a mesh sponge layer.

5. A closed-loop air-cooled tower cooling and exhaust system according to claim 4, characterized in that: The strip box (11) and the unit box (12) are made of rigid non-metallic mesh skeleton material.

6. A closed-loop air-cooled tower cooling and exhaust system according to claim 5, characterized in that: The unit box (12) extends to the outside of the strip box (11) and is connected to the handle (13).

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