Closed cooling tower coil drainage anti-freezing system
Through the combination of air compressor and heating box, the accelerated evaporation technology of high-pressure air and hot air are used to automatically control the drainage process, which solves the problem of frozen cracking of closed cooling tower coils due to unspent water, and prevents frozen cracking and stability of production.
Patent Information
- Application Number
- CN202420253918.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-02-02
AI Technical Summary
In cold weather conditions, closed cooling tower coils are prone to freeze cracks due to undischarged water. The prior art cannot completely solve the problem by continuous operation or opening the valve drainage, resulting in waste of electricity and freeze crack accidents, affecting production.
Use air compressors and gas storage tanks to store high-pressure air, use high-pressure air to eliminate water in the coil, and heat the air through the blower and heating box to accelerate the evaporation of residual water. The drainage process is automatically controlled by the controller and sensor to ensure that there is no water in the coil. freeze.
Effectively drain the water in the coil, prevent freezing and cracking accidents, save electricity and human resources, and ensure normal production operation.
Smart Images
Figure CN222231417U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of coil drainage, in particular to a closed cooling tower coil drainage antifreeze system. Background Art
[0002] A closed cooling tower is also called an evaporative air cooler, a sealed cooling tower or a closed cooling tower. It uses the pressure generated by a water pump device to transport the higher temperature water, i.e. cooling water, coming out of a condenser, absorber or process equipment to the cooling coil of the cooling tower. The circulating water enters the cooling tower and achieves a cooling effect through the movement and circulation of air in the cooling tower, the heat exchange between the spray water outside the tube and the circulating water inside the tube. The temperature in the north is often below zero in winter. Due to the characteristics of the production system or changes in the production rhythm, there are production interruptions or maintenance shutdowns (such as the circulating water system of the steelmaking continuous casting crystallizer). At this time, in order to avoid the closed cooling tower coil from freezing and cracking due to water accumulation, the circulating water system needs to be operated continuously or the valve should be opened to drain the water inside the coil when the closed cooling tower is shut down. The reality is that continuous operation for antifreeze will waste too much electricity. Opening the valve to drain the water in the coil cannot completely drain it, and there will be a coil freezing and cracking accident. After freezing and cracking, manpower and material resources will be wasted for repair, and normal production may be affected. Utility Model Content
[0003] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a closed cooling tower coil drainage antifreeze system.
[0004] The technical scheme adopted by the utility model is: a closed cooling tower coil drainage antifreeze system, including a cooling tower coil, an air compressor, an air storage tank, a heating box, a blower, and a controller, the cooling tower coil is provided with a water inlet and a water outlet, the water inlet is connected to a cooling water source device through an inlet pipe, the water outlet is connected to a circulating water pool for a closed cooling tower through an outlet pipe, a first valve is provided on the inlet pipe, a first branch port and a second branch port are provided on the inlet pipe between the first valve and the water inlet, the output end of the air compressor is connected to the air storage tank, a second valve is provided on the pipe connecting the air compressor and the air storage tank, the output end of the air storage tank is connected to the first branch port through a pipe, a third valve is provided on the pipe connecting the air storage tank and the first branch port, the blower is connected to the heating box, the heating box is connected to the second branch port through a pipe, a fourth valve is provided on the pipe connecting the second branch port and the heating box, and the air compressor and the blower are both connected to the controller;
[0005] Further, the first valve, the second valve, the third valve, and the fourth valve are all electric valves, and the first valve, the second valve, the third valve, and the fourth valve are all connected to the controller;
[0006] Furthermore, the gas storage tank is provided with a pressure sensor, and the pressure sensor is connected to the controller;
[0007] Furthermore, an air humidity sensor is provided at the water outlet, and the air humidity sensor is connected to the controller;
[0008] Furthermore, the heating box is provided with an air inlet and an air outlet, and a heating wire is provided in the heating box. The heating wire is connected to a heating wire switch, and the heating wire switch is connected to a controller.
[0009] The utility model provides an air compressor and an air storage tank to store high-pressure air in the air storage tank, and utilizes the impact force and fluidity of the high-pressure air to remove most of the residual water in the coil; provides a blower and a heating box to heat the air blown out by the blower, so that the hot air enters the coil to prevent the small amount of residual water in the coil from freezing, accelerates the evaporation of the residual water and is carried out of the coil with the flow of the hot air, and finally removes the water in the coil and prevents the frozen coil.
[0010] The utility model can drain the residual water in the closed cooling tower coil, ensuring that the closed cooling tower coil will not be damaged by freezing due to failure to drain the water in cold weather, thereby indirectly saving manpower and material resources and ensuring normal production. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the connection relationship of the utility model.
[0012] Figure 2 This is a schematic diagram of the structure of the electric heating box of the utility model.
[0013] Figure 3 This is a schematic diagram of the connection relationship of the controller of the utility model.
[0014] In the figure: 1. cooling tower coil, 2. air compressor, 3. air storage tank, 4. heating box, 402. air inlet, 403. air outlet, 404. heating wire, 5. blower, 6. controller, 7. water inlet, 8. water outlet, 9. first valve, 10. second valve, 11. third valve, 12. fourth valve, 13. first branch, 14. second branch, 15. pressure sensor, 16. air humidity sensor. DETAILED DESCRIPTION
[0015] In order to more clearly understand the technical solution of the present invention, the present invention is further described below in conjunction with the accompanying drawings.
[0016] like Figure 1-Figure 3As shown, a closed cooling tower coil 1 drainage antifreeze system includes a cooling tower coil 1, an air compressor 2, an air storage tank 3, a heating box 4, a blower 5, and a controller 6. The cooling tower coil 1 is provided with a water inlet 7 and a water outlet 8. The water inlet 7 is connected to a cooling water source device through an inlet pipe, and the water outlet 8 is connected to a circulating water pool for a closed cooling tower through an outlet pipe. A first valve 9 is provided on the inlet pipe, and a first branch port 13 and a second branch port 13 are provided on the inlet pipe between the first valve 9 and the inlet 7. 4, the output end of the air compressor 2 is connected to the gas tank 3, a second valve 10 is provided on the pipeline connecting the air compressor 2 and the gas tank 3, the output end of the gas tank 3 is connected to the first branch port 13 through a pipeline, a third valve 11 is provided on the pipeline connecting the gas tank 3 and the first branch port 13, the blower 5 is connected to the heating box 4, the heating box 4 is connected to the second branch port 14 through a pipeline, a fourth valve 12 is provided on the pipeline connecting the second branch port 14 and the heating box 4, and the air compressor 2 and the blower 5 are both connected to the controller 6;
[0017] Preferably, the first valve 9, the second valve 10, the third valve 11, and the fourth valve 12 are all electric valves, and the first valve 9, the second valve 10, the third valve 11, and the fourth valve 12 are all connected to the controller 6;
[0018] Preferably, a pressure sensor 15 is provided on the gas storage tank 3, and the pressure sensor 15 is connected to the control. The gas storage tank 3 is used to store high-pressure air. When the pressure in the gas storage tank 3 reaches a certain value, the controller 6 receives a signal from the pressure sensor 15, issues an instruction for the air compressor 2 to stop working, and the second valve 10 is closed;
[0019] Preferably, an air humidity sensor 16 is provided at the water outlet 8, and the air humidity sensor 16 is connected to the controller 6. When the blower 5 and the heating box 4 are working, hot air enters the coil to accelerate the evaporation of residual water in the coil and flush out the water outlet 8. The air humidity sensor 16 provided at the water outlet 8 detects the air humidity there. When the air humidity reaches a certain value, the blower 5 and the heating box 4 stop working, and the coil drainage ends;
[0020] Preferably, the heating box 4 is provided with an air inlet 402 and an air outlet 403, and a heating wire 404 is provided inside the heating box 4. The heating wire 404 is connected to a heating wire switch, and the heating wire switch is connected to the controller 6. The heating box 4 heats the air blown in by the blower 5 through the heating wire 403 provided inside it.
[0021] Working principle: When the closed cooling tower needs to be shut down and the coil needs to be drained, the first valve 9 is closed, the second valve 10 is opened, the third valve 11 is closed, and the fourth valve 12 is closed. The air compressor 2 starts to prepare high-pressure air and delivers it to the air storage tank 3. When the pressure of the air storage tank 3 reaches a certain value, the controller 6 issues a command, the second valve 10 is closed, and the third valve 11 is opened. High-pressure air enters the coil to discharge the remaining water in the coil. During operation, when the pressure of the air storage tank 3 drops to a certain value, the third valve 11 is closed, the second valve 10 is opened, and the air compressor 2 continues to pump air into the storage tank. The gas tank 3 inputs high-pressure air until the pressure in the gas tank 3 reaches the requirement. After the high-pressure air is drained for a certain period of time, the third valve 11 is closed, the fourth valve 12 is opened, the blower 5 and the heating box 4 start to work, and the hot air enters the coil to accelerate the evaporation of the residual water in the coil and bring it out. When the air humidity sensor 16 arranged at the water outlet 8 detects that the air humidity here drops to a certain value, the blower 5 and the heating box 4 stop working, the coil is drained, and the closed cooling tower works normally, the first valve 9 is opened, and the third valve 11 and the fourth valve 12 are closed.
[0022] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.
Claims
1. A closed cooling tower coil drainage antifreeze system, characterized in that: It includes a cooling tower coil, an air compressor, an air storage tank, a heating box, a blower, and a controller. The cooling tower coil is provided with a water inlet and a water outlet. The water inlet is connected to a cooling water source device through an inlet pipe, and the water outlet is connected to a circulating water pool for a closed cooling tower through an outlet pipe. A first valve is provided on the inlet pipe, and a first branch and a second branch are provided on the inlet pipe between the first valve and the water inlet. The output end of the air compressor is connected to the air storage tank, and a second valve is provided on the pipe connecting the air compressor and the air storage tank. The output end of the air storage tank is connected to the first branch through a pipe, and a third valve is provided on the pipe connecting the air storage tank and the first branch. The blower is connected to the heating box, and the heating box is connected to the second branch through a pipe, and a fourth valve is provided on the pipe connecting the second branch and the heating box. The air compressor and the blower are both connected to the controller.
2. A closed cooling tower coil drainage antifreeze system according to claim 1, characterized in that: The first valve, the second valve, the third valve and the fourth valve are all electric valves, and the first valve, the second valve, the third valve and the fourth valve are all connected to a controller.
3. A closed cooling tower coil drainage antifreeze system according to claim 1, characterized in that: The gas storage tank is provided with a pressure sensor, and the pressure sensor is connected to the controller.
4. A closed cooling tower coil drainage antifreeze system according to claim 1, characterized in that: An air humidity sensor is arranged at the water outlet, and the air humidity sensor is connected to the controller.
5. A closed cooling tower coil drainage antifreeze system according to claim 1, characterized in that: The heating box is provided with an air inlet and an air outlet. A heating wire is provided in the heating box. The heating wire is connected to a heating wire switch. The heating wire switch is connected to a controller.