Circulating water bypass filtering energy-saving system

Abstract

The utility model relates to the technical field of circulating water, in particular to a circulating water bypass filtering energy-saving system, which comprises a cooling tower, a water supply main pipe and a water return main pipe, the upper part of the cooling tower is connected with the water return main pipe through a water return branch pipe, and the lower part of the cooling tower is provided with a cooling water tank which is connected with the water supply main pipe through a water supply branch pipe; the cooling water tank is connected with a bypass filter pump water inlet through a bypass filter branch pipe I, a bypass filter pump water outlet is connected with a bypass filter water inlet through a bypass filter branch pipe II, a bypass filter water outlet is connected with the cooling water tank through a bypass filter water outlet pipe, the bypass filter water inlet is provided with an inlet pressure gauge and a bypass filter inlet valve, and the bypass filter water outlet is provided with an outlet pressure gauge and a bypass filter outlet valve; the second bypass filter branch pipe is connected with the water return main pipe and the water supply main pipe through a third bypass filter branch pipe and a fourth bypass filter branch pipe. According to the utility model, the energy consumption is saved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating water, in particular to a circulating water side filtration energy-saving system. Background Art

[0002] During the stable operation of a circulating water cooling system, foreign matter intrusion issues arise primarily from various sources. For example, during the water replenishment phase, when the system requires fresh water, if the water source itself contains untreated impurities or foreign matter, these substances will enter the circulating water system along with the water flow. Equipment failure and leakage: Damage or cracks in key components such as heat exchangers and pipes can allow external solid particles and impurities to enter the system, directly affecting water quality. Atmospheric environmental impact: As the circulating water exchanges heat with the external environment in the cooling tower, pollutants such as airborne dust, pollen, and small insects can be carried by the wind into the water, contaminating the circulating water. Internal corrosion products: Metal components within the system corrode over time, and the resulting corrosion products accumulate in the circulating water, becoming a new source of foreign matter. Microbial activity: Microbial reproduction and their metabolic products are also a significant component of foreign matter in the circulating water, potentially forming deposits or affecting water quality. Maintenance negligence: During system maintenance, overhaul, or modification, improper operation can allow tools, component fragments, or repair materials to accidentally fall into the circulating water system, causing contamination.

[0003] Given the diverse sources of these foreign matter, circulating water systems are commonly equipped with bypass filtration systems to effectively remove these insoluble impurities through mechanical filtration. The bypass filtration water volume should be determined based on a comprehensive consideration of the system's total water volume, the degree of water contamination, specific process requirements, and the filtration efficiency of the bypass filtration equipment. Generally, the bypass filtration water volume is set between 1% and 5% of the total circulating water volume. However, this percentage can be adjusted upwards to ensure water quality meets standards and optimize operating costs when water quality deteriorates or higher standards are met. Properly determining the bypass filtration water volume is crucial for optimizing operating costs and water quality control in circulating water systems. Too little bypass filtration water may not effectively remove impurities, leading to deteriorating water quality; while too much bypass filtration water may increase energy consumption and operating costs. Therefore, a bypass filtration system typically consists of a pump and a bypass filter. The pump provides pressure to propel water through the bypass filter, helping to improve filtration efficiency and effectiveness. The bypass filtration system is typically installed above the cooling water tank, diverting a portion of the cooling water to the bypass filter for filtration before returning it to the cooling water tank. This system requires the pump to run continuously, consuming significant energy over time. At the same time, the circulating water in the circulation system is transferred from the supply pipe to the return pipe under water pressure and then enters the cooling tower for cooling. The pressure of the circulating water reaching the return pipe is often relatively low, and is only used to send the circulating water into the cooling tower, resulting in the waste of excess return water pressure. Utility Model Content

[0004] The technical problem to be solved by the utility model is to propose a circulating water side filtration energy-saving system, which saves energy consumption and reduces production costs.

[0005] The circulating water bypass filtration energy-saving system described in the utility model comprises a cooling tower, a water supply main and a return water main. The upper part of the cooling tower is connected to the return water main through a return water branch. A cooling water pool is provided at the lower part of the cooling tower. The cooling water pool is connected to the water supply main through a water supply branch. A circulating pump is provided on the water supply branch. The cooling water pool is connected to the bypass filtration pump inlet through a bypass filtration branch pipe 1. The bypass filtration pump outlet is connected to the bypass filter inlet through a bypass filtration branch pipe 2. The bypass filter outlet is connected to the cooling water pool through a bypass filtration outlet pipe. The bypass filter inlet is provided with an inlet pressure gauge and a bypass filter inlet valve. The bypass filter outlet is provided with an outlet pressure gauge and a bypass filter outlet valve. The bypass filter branch pipe 2 is connected to the return water main and the water supply main through a bypass filtration branch pipe 3 and a bypass filtration branch pipe 4 respectively.

[0006] Preferably, a heat exchanger is provided on the return water main, and a refrigerant inlet and a refrigerant outlet are provided on the heat exchanger. The heat of the return water is recovered before entering the cooling tower, so that the heat recovery is more sufficient.

[0007] Preferably, multiple side filters are provided, and the multiple side filters are arranged in parallel. When one side filter is blocked, another side filter can be switched in time for filtering without affecting production.

[0008] Preferably, the first bypass filter branch pipe is provided with a first bypass filter valve, the third bypass filter branch pipe is provided with a third bypass filter valve, and the fourth bypass filter branch pipe is provided with a fourth bypass filter valve.

[0009] Preferably, a check valve is provided on the second bypass filter pipe, and a bypass branch pipe is connected in parallel with the check valve. The bypass branch pipe ensures that water can be transported from the bypass branch pipe when the check valve fails, thereby avoiding affecting production.

[0010] Valves can be installed on the pipeline according to control needs, and the flow of materials in the corresponding pipeline can be conveniently controlled and adjusted by opening and closing the valves.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The cooling water tank is connected to the bypass filter inlet via bypass filter branch pipe 2, and the bypass filter inlet is then connected to the return water main and the water supply main via bypass filter branch pipe 3 and bypass filter branch pipe 4, which are connected to bypass filter branch pipe 2. The bypass filter inlet can be selected from the cooling water tank, the return water main, or the water supply main according to the water pressure in the pipeline. When the water pressure in the return water main is sufficient, water is supplied to the bypass filter via the return water main. When the water pressure in the return water main is insufficient, the bypass filter pump can be started to supply water to the bypass filter from the cooling water tank, or directly from the water supply main. Flexible switching avoids the bypass filter pump from constantly running, reduces energy consumption, and saves production costs.

[0013] 2. When the value on the inlet pressure gauge on the bypass filter is much greater than the value on the outlet pressure gauge, it can be determined that the bypass filter is blocked. Close the bypass filter inlet valve and bypass filter outlet valve, clean the bypass filter before using it again. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model circulating water side filtration energy-saving system;

[0015] In the figure: 1. Cooling tower; 2. Water supply main; 3. Return water main; 4. Return water branch; 5. Cooling water tank; 6. Water supply branch; 7. Circulation pump; 8. Bypass filter branch pipe 1; 9. Bypass filter pump; 10. Bypass filter branch pipe 2; 11. Bypass filter; 12. Bypass filter outlet pipe; 13. Inlet pressure gauge; 14. Bypass filter inlet valve; 15. Outlet pressure gauge; 16. Bypass filter outlet valve; 17. Bypass filter branch pipe 3; 18. Bypass filter branch pipe 4; 19. Heat exchanger; 20. Bypass filter valve 1; 21. Bypass filter valve 3; 22. Bypass filter valve 4; 23. Check valve; 24. Bypass branch pipe. DETAILED DESCRIPTION

[0016] The present invention will be described clearly and completely below with reference to the accompanying drawings.

[0017] like Figure 1 As shown, the circulating water bypass filtration energy-saving system described in the present invention includes a cooling tower 1, a water supply pipe 2 and a return water pipe 3. The upper part of the cooling tower 1 is connected to the return water pipe 3 through a return water branch 4. A cooling water pool 5 is provided at the lower part of the cooling tower 1. The cooling water pool 5 is connected to the water supply pipe 2 through a water supply branch 6. A circulating pump 7 is provided on the water supply branch 6. The cooling water pool 5 is connected to the water inlet of the bypass filter pump 9 through a bypass filter branch pipe 1 8. The water outlet of the bypass filter pump 9 is connected to the water inlet of the bypass filter 11 through a bypass filter branch pipe 2 10. The water outlet of the bypass filter 11 is connected to the cooling water pool 5 through a bypass filter outlet pipe 12. The water inlet of the bypass filter 11 is provided with an inlet pressure gauge 13 and a bypass filter inlet valve 14. The water outlet of the bypass filter 11 is provided with an outlet pressure gauge 15 and a bypass filter outlet valve 16; the bypass filter branch pipe 2 10 is connected to the return water pipe 3 and the water supply pipe 2 through a bypass filter branch pipe 3 17 and a bypass filter branch pipe 4 18 respectively.

[0018] A heat exchanger 19 is provided on the return water main 3. The heat exchanger 19 is provided with a refrigerant inlet and a refrigerant outlet.

[0019] There are multiple side filters 11, and the multiple side filters 11 are arranged in parallel.

[0020] A bypass filter valve 1 20 is provided on the bypass filter branch pipe 1 8 , a bypass filter valve 3 21 is provided on the bypass filter branch pipe 3 17 , and a bypass filter valve 4 22 is provided on the bypass filter branch pipe 4 18 .

[0021] A check valve 23 is provided on the bypass branch pipe 2 10. The check valve 23 is connected in parallel with a bypass branch pipe 24.

[0022] The working process is as follows: when the water pressure in the return water main 3 is sufficient, the bypass filter valve 1 20 is closed and the bypass filter valve 3 21 is opened, and water flows from the return water main 3 to the bypass filter 11; when the water pressure in the return water main 3 is insufficient, the bypass filter valve 1 20 is opened, the bypass filter valve 3 21 is closed, the bypass filter pump 9 is started, and water is supplied to the bypass filter 11 from the cooling water tank 5. If the water pressure in the pipeline remains at a low level for a long time, the bypass filter valve 1 20 can be closed and the bypass filter valve 4 22 can be opened to use the circulating pump 7 to provide power to supply water to the bypass filter from the water supply main 2.

Claims

1. A circulating water bypass filtration energy-saving system, comprising a cooling tower (1), a water supply main (2) and a return water main (3), characterized in that: The upper part of the cooling tower (1) is connected to the return water main (3) through the return water branch (4), and the lower part of the cooling tower (1) is provided with a cooling water pool (5), the cooling water pool (5) is connected to the water supply main (2) through the water supply branch (6), and a circulation pump (7) is provided on the water supply branch (6). The cooling water pool (5) is connected to the water inlet of the bypass filter pump (9) through the bypass filter branch pipe 1 (8), and the water outlet of the bypass filter pump (9) is connected to the bypass filter (11) through the bypass filter branch pipe 2 (10). The water inlet of the bypass filter (11) is connected to the cooling water tank (5) through the bypass filter outlet pipe (12); the water inlet of the bypass filter (11) is provided with an inlet pressure gauge (13) and a bypass filter inlet valve (14); the water outlet of the bypass filter (11) is provided with an outlet pressure gauge (15) and a bypass filter outlet valve (16); the bypass filter branch pipe 2 (10) is connected to the return water main (3) and the water supply main (2) through the bypass filter branch pipe 3 (17) and the bypass filter branch pipe 4 (18).

2. The circulating water bypass filtration energy-saving system according to claim 1, characterized in that: A heat exchanger (19) is provided on the return water main (3).

3. The circulating water bypass filtration energy-saving system according to claim 2, characterized in that: The heat exchanger (19) is provided with a refrigerant inlet and a refrigerant outlet.

4. The circulating water bypass filtration energy-saving system according to claim 1, characterized in that: A plurality of side filters (11) are provided, and the plurality of side filters (11) are arranged in parallel.

5. The circulating water bypass filtration energy-saving system according to claim 1, characterized in that: The first bypass filter branch pipe (8) is provided with a first bypass filter valve (20), the third bypass filter branch pipe (17) is provided with a third bypass filter valve (21), and the fourth bypass filter branch pipe (18) is provided with a fourth bypass filter valve (22).

6. The circulating water bypass filtration energy-saving system according to claim 1, characterized in that: A check valve (23) is provided on the second side filter branch pipe (10).

7. The circulating water bypass filtration energy-saving system according to claim 6, characterized in that: The check valve (23) is connected in parallel with a bypass branch pipe (24).

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