Cooling water indirect heat exchange system

Abstract

The utility model belongs to the technical field of heating and ventilation, and discloses a cooling water indirect heat exchange system. Comprising plate heat exchangers and buffer water tanks, the cooling water supply pipe, one side of the plate heat exchanger and the cooling water return pipe are connected to form closed circulation; the other side of the plate heat exchanger is respectively connected with a softened water supply pipe and a softened water return pipe; the buffer water tank is arranged between the plate heat exchanger and the softened water return pipe and is connected with the plate heat exchanger; the softened water supply pipe and the softened water return pipe are respectively connected with the user side; a pipeline pulse descaling instrument is arranged on the softened water supply pipe, and a chemical feeder is connected in parallel on a pipeline through which the pipeline pulse descaling instrument is connected with the user side. Circulating cooling water is used as a cold source to circularly cool softened water, and the system is a closed system. According to the system, indirect heat exchange and one-time water replenishing recycling are achieved, the performance of the system is improved, cost is saved, secondary reverse osmosis in a long-distance conveying pipe network is achieved, and water quality is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of HVAC technology, and relates to an indirect heat exchange system for cooling water. More particularly, it relates to an indirect heat exchange system for cooling water with contaminated secondary piping. Background Technology

[0002] The existing system uses cooling water to directly cool the equipment. After the cooling water heats up, severe scaling occurs inside the equipment, affecting operation, causing significant pollution of the cooling water, resulting in waste, and ultimately impacting system performance and efficiency. Furthermore, even after the cooling water undergoes primary reverse osmosis treatment in the machine room, iron ions precipitate again in the long-distance transport pipelines, failing to meet user requirements. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the aforementioned background technology and, in order to ensure the long-term stable and effective operation of the cooling system, to provide a cooling water indirect heat exchange system. The circulating cooling water serves as the cold source to circulate and cool softened water; the system is a closed-loop system. This system uses indirect heat exchange, with a single water replenishment cycle, increasing system performance, saving costs, and enabling secondary reverse osmosis in long-distance pipeline networks to ensure water quality.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a cooling water indirect heat exchange system, including a plate heat exchanger and a buffer water tank; a cooling water supply pipe, one side of the plate heat exchanger, and a cooling water return pipe are connected to form a closed loop; the other side of the plate heat exchanger is respectively connected to a softened water supply pipe and a softened water return pipe; the buffer water tank is set between the plate heat exchanger and the softened water return pipe, and the buffer water tank is connected to the plate heat exchanger; the softened water supply pipe and the softened water return pipe are respectively connected to the user end; a pipeline pulse descaling device is installed on the softened water supply pipe, and a dosing device is connected in parallel on the pipeline connected to the user end of the pipeline pulse descaling device.

[0005] Furthermore, the cooling water supply pipe is connected to the external cooling water inlet pipe.

[0006] Furthermore, a softened water circulation pump is installed on the pipeline connecting the buffer tank and the plate heat exchanger.

[0007] Furthermore, the buffer tank is also connected to a softened water supply pipe; a water supply solenoid valve is installed on the softened water supply pipe.

[0008] Furthermore, butterfly valves are installed on the cooling water supply pipe, cooling water return pipe, softened water supply pipe, softened water return pipe, and softened water makeup pipe.

[0009] Furthermore, a level gauge is installed inside the buffer tank.

[0010] The system is also equipped with a PLC control system. The plate heat exchanger, softened water circulating pump, water supply solenoid valve, pipeline pulse descaling device, dosing device, and level gauge are all connected to the PLC control system. There is no restriction on any specific model; the system only needs to perform its working functions.

[0011] The advantages of this utility model compared with the prior art are:

[0012] The cooling water indirect heat exchange system provided by this utility model utilizes indirect heat exchange with cooling water to cool down softened water, enabling the equipment to operate stably and efficiently, improving the water quality entering the equipment, saving a significant amount of cooling water, and reducing operating costs. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is a schematic diagram of an indirect heat exchange system for cooling water according to this utility model.

[0015] In the diagram: 1. Plate heat exchanger, 2. Softened water circulating pump, 3. Buffer tank, 4. Make-up water solenoid valve, 5. User end, 6. Cooling water supply pipe, 7. Cooling water return pipe, 8. Softened water supply pipe, 9. Softened water return pipe, 10. Softened water make-up pipe, 11. Pipeline pulse descaling device, 12. Dosing device. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0017] Example 1

[0018] A cooling water indirect heat exchange system, such as Figure 1 The system includes a plate heat exchanger 1 and a buffer water tank 3; a cooling water supply pipe 6, one side of the plate heat exchanger 1, and a cooling water return pipe 7 are connected to form a closed loop; the other side of the plate heat exchanger 1 is connected to a softened water supply pipe 8 and a softened water return pipe 9 respectively; the buffer water tank 3 is located between the plate heat exchanger 1 and the softened water return pipe 9, and the buffer water tank 3 is connected to the plate heat exchanger 1; the softened water supply pipe 8 and the softened water return pipe 9 are respectively connected to the user terminal 5; a pipeline pulse descaling device 11 is installed on the softened water supply pipe 8, and a dosing device 12 is connected in parallel on the pipeline connecting the pipeline pulse descaling device 11 and the user terminal 5.

[0019] Furthermore, cooling water supply pipe 6 is connected to an external cooling water inlet pipe.

[0020] Furthermore, a softened water circulation pump 2 is installed on the pipeline connecting the buffer water tank 3 and the plate heat exchanger 1.

[0021] Furthermore, the buffer water tank 3 is also connected to the softened water supply pipe 10; a water supply solenoid valve 4 is installed on the softened water supply pipe 10.

[0022] Furthermore, butterfly valves are installed on the cooling water supply pipe 6, cooling water return pipe 7, softened water supply pipe 8, softened water return pipe 9, and softened water makeup pipe 10.

[0023] Furthermore, a level gauge is installed inside the buffer tank 3.

[0024] The system is also equipped with a PLC control system. The plate heat exchanger 1, softened water circulation pump 2, water replenishment solenoid valve 4, pipeline pulse descaling device 11, dosing device 12, and level gauge are all connected to the PLC control system. None of them are limited to a specific model, as long as they can perform their working functions.

[0025] Cooling water is connected to plate heat exchanger 1 via cooling water supply pipe 6 and cooling water return pipe 7, forming a closed loop for indirect heat exchange with the softened water circulation system. On the other side, softened water is stored in buffer tank 3 via softened water return pipe 9. The outlet of buffer tank 3 is connected to the inlet of softened water circulation pump 2, and the outlet of softened water circulation pump 2 is connected back to the softened water return port of plate heat exchanger 1. The softened water supply port of plate heat exchanger 1 is connected to user 5 via softened water supply pipe 8. Softened water supply pipe 8 is equipped with a pipeline pulse descaling device 11 and a dosing device 12. Makeup water is connected to buffer tank 3 via softened water makeup pipe 10, and a makeup solenoid valve 4 is installed on softened water makeup pipe 10. The pipeline pulse descaling device removes iron ions from the long-distance transport of softened water in the pipeline supply pipe 8. The dosing device 12 maintains the pH value of the water to maximize the effect of the pulse descaling device 11. The water supply solenoid valve 4 is connected to the PLC control system to control the water supply flow rate and time. The buffer tank 2 is equipped with a level gauge to control the water level.

[0026] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A cooling water indirect heat exchange system, characterized in that, The system includes a plate heat exchanger (1) and a buffer water tank (3); a cooling water supply pipe (6), one side of the plate heat exchanger (1), and a cooling water return pipe (7) are connected to form a closed loop; the other side of the plate heat exchanger (1) is connected to a softened water supply pipe (8) and a softened water return pipe (9); the buffer water tank (3) is located between the plate heat exchanger (1) and the softened water return pipe (9), and the buffer water tank (3) is connected to the plate heat exchanger (1); the softened water supply pipe (8) and the softened water return pipe (9) are connected to the user end (5); a pipeline pulse descaling device (11) is installed on the softened water supply pipe (8), and a dosing device (12) is connected in parallel on the pipeline connecting the pipeline pulse descaling device (11) and the user end (5).

2. The cooling water indirect heat exchange system as described in claim 1, characterized in that, (6) External cooling water inlet pipe for cooling water supply.

3. The cooling water indirect heat exchange system as described in claim 1, characterized in that, A softened water circulation pump (2) is installed on the pipeline connecting the buffer tank (3) and the plate heat exchanger (1).

4. The cooling water indirect heat exchange system as described in claim 1, characterized in that, The buffer water tank (3) is also connected to the softened water supply pipe (10); a water supply solenoid valve (4) is installed on the softened water supply pipe (10).

5. The cooling water indirect heat exchange system as described in claim 1, characterized in that, Butterfly valves are installed in the cooling water supply pipe (6), cooling water return pipe (7), softened water supply pipe (8), softened water return pipe (9), and softened water replenishment pipe (10).

6. The cooling water indirect heat exchange system as described in claim 1, characterized in that, A level gauge is installed inside the buffer tank (3).

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