Cooling tower system with water mist regulation function

Abstract

The present invention discloses a cooling tower system with a water mist regulating function, comprising: a heat exchanger, an air chamber and a central processing device, wherein the heat exchanger comprises: a heat exchange shell, a low-temperature gas inlet, a high-temperature gas outlet, a high-temperature liquid inlet and a low-temperature liquid outlet; the air chamber comprises: an air chamber cavity, a first gas inlet, a second gas inlet, a third gas inlet and a plurality of mixed gas outlets, the first gas inlet is connected to the exhaust port of the cooling tower, the second gas inlet is connected to the ambient air, and the third gas inlet is connected to the high-temperature gas outlet of the heat exchanger, each gas inlet is provided with a thermometer, a valve and a flow meter, and each mixed gas outlet is provided with an outlet valve; the central processing device is communicatively connected with each thermometer, valve and flow meter.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling equipment, and in particular to a cooling tower system. Background Art

[0002] Currently, mechanical ventilation cooling towers are essential supporting products for central air conditioning. Cooling towers are needed to cool water to ensure the normal operation of the air conditioning unit. Large and medium-sized buildings in cities, including those with central air conditioning, must have cooling tower equipment installed on their roofs.

[0003] A cooling tower is a device that uses water as a circulating coolant, absorbing heat from a system and releasing it into the atmosphere to lower the water temperature. Hot water in the cooling tower interacts with the flowing air, generating steam. This steam evaporates and removes heat through evaporative heat transfer, convection heat transfer, and radiation heat transfer. This dissipates industrial waste heat, lowering the water temperature and ensuring the proper operation of the system.

[0004] The traditional cooling tower is mainly composed of a tower body, an axial flow fan, a circulating water pump, a water distributor, a sprinkler head, a cooling filler, a water collection tank and a water collector. The process hot water is pumped by the circulating water pump to the water distributor inside the tower, and is evenly sprayed on the cooling filler through the sprinkler head, and flows downward along the filler surface. At the same time, driven by the fan blades of the axial flow fan at the top of the tower, the ambient cold air enters the tower from the air intake louver window at the lower part of the tower body, passes upward through the cooling filler layer, the water mist area and the water collector until it is discharged out of the tower. In this process, most of the water film formed on the surface of the cooling filler exchanges heat with the cold air and evaporates. At the same time, the remaining hot water and the cold air are in contact and heat exchange, so that the temperature of the hot water gradually decreases, thereby achieving the purpose of cooling the hot water. Through heat exchange, the cold air becomes hot and humid air with a higher temperature and is discharged out of the tower.

[0005] However, in the process of heat exchange between the cold air in the cooling tower and the circulating water with waste heat, due to the evaporation of cooling water, the hot and humid air takes away a large amount of heat and water vapor, making the temperature and humidity of the hot and humid air higher. Once the hot and humid air is discharged from the tower and comes into contact with the cold air, it is immediately cooled and condensed to form white mist. The lower the external ambient temperature, the more and thicker the white mist is formed, which can easily cause environmental pollution and visual obstruction.

[0006] Therefore, providing a cooling tower system that can both ensure the normal use of central air conditioning and have the function of regulating water mist has become an urgent problem to be solved in the industry. Summary of the Invention

[0007] The purpose of the present invention is to provide a cooling tower system with a water mist regulating function, which can avoid the condensation of water vapor while ensuring the normal use of central air conditioning, thereby achieving the effect of reducing or eliminating or discharging water mist from the cooling tower.

[0008] In order to achieve the above-mentioned purpose, the present invention provides a cooling tower system with a water mist regulating function, comprising: a heat exchanger, an air chamber, and a central processing equipment, the heat exchanger comprising: a heat exchange shell, a low-temperature gas inlet, a high-temperature gas outlet, a high-temperature liquid inlet and a low-temperature liquid outlet, wherein the low-temperature gas inlet is connected to the ambient air, the high-temperature gas outlet is connected to the air chamber, the high-temperature liquid inlet is connected to the air-conditioning hot water pool, and the low-temperature liquid outlet is connected to the air-conditioning cooling water pool; the air chamber comprises: an air chamber cavity, a first gas inlet provided at the bottom of the air chamber cavity, a second gas inlet and a third gas inlet provided on the side wall of the air chamber cavity, and a plurality of mixed gas outlets provided on the top wall of the air chamber cavity, the first gas inlet is connected to the exhaust port of the cooling tower to collect the hot and humid air discharged from the air-conditioning cooling tower, the second gas inlet is connected to the ambient air to collect the hot and humid air discharged from the air-conditioning cooling tower, and the second gas inlet is connected to the ambient air to collect the hot and humid air discharged from the air-conditioning cooling tower. Ambient air is introduced into the air chamber cavity, and the third gas inlet is connected to the high-temperature gas outlet of the heat exchanger to introduce hot air into the air chamber cavity. The first gas inlet is provided with a first thermometer, a first valve and a first flow meter to monitor the temperature of the humid hot air and the flow rate entering the air chamber in real time. The second gas inlet is provided with a second thermometer, a second valve and a second flow meter to monitor the temperature of the ambient air and the flow rate entering the air chamber in real time. The third gas inlet is provided with a third thermometer, a third valve and a third flow meter to monitor the temperature of the hot air and the flow rate entering the air chamber in real time. An outlet valve is provided at each mixed gas outlet; the central processing equipment is communicatively connected with the first thermometer, the first valve, the first flow meter, the second thermometer, the second valve, the second flow meter, the third thermometer, the third valve, the third flow meter and the outlet valve.

[0009] Optionally, the temperature difference between the humid hot air and the hot air is set to 10-20 degrees, wherein the temperature of the humid hot air is higher than the temperature of the hot air, and the temperature of the hot air is higher than the temperature of the ambient air.

[0010] Optionally, when the central processing device monitors that the temperature difference between the humid hot air and the ambient air is less than 10 degrees Celsius, the central processing device opens the first valve and the second valve, closes the third valve, and controls the ratio between the intake volume of the humid hot air entering the air chamber and the intake volume of the ambient air entering the air chamber to be 1:1~1:1.5.

[0011] Optionally, when the central processing device monitors that the temperature difference between the humid hot air and the ambient air is greater than 30 degrees Celsius, the central processing device opens the first valve and the third valve, and closes the second valve, and monitors that when the temperature difference between the humid hot air and the hot air is less than 15 degrees Celsius, the ratio between the intake volume of the humid hot air entering the air chamber and the intake volume of the hot air entering the air chamber is controlled to be 1:1~1:1.2, and when the temperature difference between the humid hot air and the hot air is greater than 15 degrees Celsius, the ratio between the intake volume of the humid hot air entering the air chamber and the intake volume of the hot air entering the air chamber is controlled to be 1:1.3~1:1.5.

[0012] Optionally, when the central processing device monitors that the temperature difference between the humid hot air and the ambient air is 10 to 30 degrees Celsius, the central processing device opens the first valve, the second valve and the third valve, and monitors that when the temperature difference between the humid hot air and the hot air is less than 15 degrees Celsius, the central processing device controls the ratio of the intake volume of the humid hot air into the air chamber, the intake volume of the ambient air into the air chamber and the intake volume of the hot air into the air chamber to be 1:1:1 to 1:1.2:1; when the temperature difference between the humid hot air and the hot air is greater than 15 degrees Celsius, the central processing device controls the ratio of the intake volume of the humid hot air into the air chamber, the intake volume of the ambient air into the air chamber and the intake volume of the hot air into the air chamber to be 1:1:1 to 1:1.2:1.2.

[0013] Optionally, the heat exchanger is a fin-tube heat exchanger.

[0014] Optionally, a plurality of mixed gas outlets are arranged at equal intervals from each other.

[0015] Optionally, each mixed gas outlet is further provided with a pressurizing nozzle in communication with the central processing device to discharge the mixed air in the gas chamber at a pressure of 2 to 2.5 atmospheres.

[0016] Optionally, the pressurized nozzle is a single-head single-reverse nozzle or a multi-head nozzle.

[0017] Preferably, the multi-head nozzle is provided with three nozzles, and the three nozzles are arranged in an equilateral triangle.

[0018] Optionally, the air filter further includes a filter dust collector disposed between the exhaust port of the cooling tower and the first gas inlet of the air chamber to remove dust and impurities in the hot and humid air discharged from the cooling tower.

[0019] The beneficial effects of the present invention are as follows: (1) by monitoring the temperature of the hot and humid air discharged from the cooling tower and the ambient temperature, and using the heat in the hot water pool of the central air conditioner to heat the ambient air, the water mist discharged from the cooling tower of the central air conditioner can be reduced or eliminated at different ambient temperatures; (2) there is no need to change the structure of the original central air conditioner system, and this can be achieved by adding a heat exchanger, an air chamber and a central processing equipment on the outside, and the cost of the entire system is low; (3) at different ambient temperatures, the water vapor content of the exhaust can be adjusted by adjusting the air intake of the ambient air, hot air and hot and humid air into the air chamber, so that the dry and wet air can reach the best ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a cooling tower system with a water mist regulating function according to the present invention.

[0021] Figure 2 It is a schematic diagram of the air hygrograph of the present invention. DETAILED DESCRIPTION

[0022] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0023] Please refer to Figure 1 As a non-limiting embodiment, the cooling tower system with the water mist regulating function of the present invention includes: a heat exchanger 10, an air chamber 20 and a central processing device 30.

[0024] The heat exchanger 10 includes: a heat exchange shell 101, a low-temperature gas inlet 102, a high-temperature gas outlet 103, a high-temperature liquid inlet 104 and a low-temperature liquid outlet 105, wherein the low-temperature gas inlet 102 is connected to the ambient air, the high-temperature gas outlet 103 is connected to the air chamber 20, the high-temperature liquid inlet 104 is connected to the air-conditioning hot water pool (not shown in the figure), and the low-temperature liquid outlet 105 is connected to the air-conditioning cooling water pool (not shown in the figure).

[0025] The air chamber 20 includes: an air chamber cavity 200, a first gas inlet 201, a second gas inlet 202 and a third gas inlet 203, and multiple mixed gas outlets 204. The first gas inlet 201 is connected to the exhaust port 40 of the cooling tower, the second gas inlet 202 is connected to the ambient air, and the third gas inlet 203 is connected to the high-temperature gas outlet 103 of the heat exchanger 10. The first gas inlet 201 is provided with a first thermometer T1, a first valve V1 and a first flowmeter F1, the second gas inlet 202 is provided with a second thermometer T2, a second valve V2 and a second flowmeter F2, the third gas inlet is provided with a third thermometer T3, a third valve V3 and a third flowmeter F3, and each mixed gas outlet 204 is provided with an outlet valve Vg.

[0026] The central processing device 30 is communicatively connected to the first thermometer T1, the first valve V1, the first flowmeter F1, the second thermometer T2, the second valve V2, the second flowmeter F2, the third thermometer T3, the third valve V3, the third flowmeter F3 and each outlet valve Vg meter.

[0027] In winter or autumn in cold northern regions, there is a huge temperature difference between the hot and humid air discharged from the cooling tower and the ambient air, which may even reach 30 to 40 degrees Celsius. In this case, the ambient air is heated by the heat exchanger 10 so that the temperature difference between the heated hot air and the hot and humid air discharged from the cooling tower is only between 10 and 20 degrees.

[0028] In this non-limiting embodiment, the heat exchanger uses a central air conditioner to generate a large amount of hot water while cooling the surrounding air, thereby achieving energy recycling.

[0029] Therefore, the central processing device 30 monitors the temperature of the humid hot air through the first thermometer T1 and monitors the temperature of the ambient air through the second thermometer T2. When the temperature difference between the two is less than 10 degrees Celsius, the heat exchanger 10 is not needed. The central processing device 30 opens the first valve V1 and the second valve V2, and closes the third valve V3. The hot air in the heat exchanger does not need to enter the air chamber 20, and the ratio between the intake volume of the humid hot air entering the air chamber and the intake volume of the ambient air entering the air chamber is controlled to be 1:1~1:1.5. Then, the outlet valve Vg is opened to discharge the mixed gas in the air chamber 20 that is no longer in the form of water mist, and either collect it or discharge it into the atmosphere.

[0030] As another non-limiting embodiment, the central processing device 30 monitors the temperature of the humid hot air through the first thermometer T1, and monitors the temperature of the ambient air through the second thermometer T2. When the temperature difference between the two is greater than 30 degrees Celsius, the central processing device 30 opens the first valve V1 and the third valve V3, and closes the second valve V2, and monitors when the temperature difference between the humid hot air and the hot air is less than 15 degrees Celsius, controls the ratio of the intake volume of the humid hot air into the air chamber to the intake volume of the hot air into the air chamber to be 1:1~1:1.2, and when the temperature difference between the humid hot air and the hot air is greater than 15 degrees Celsius, controls the ratio of the intake volume of the humid hot air into the air chamber to the intake volume of the hot air into the air chamber to be 1:1.3~1:1.5.

[0031] As another non-limiting embodiment, the central processing device 30 monitors the temperature of the humid hot air through the first thermometer T1, and monitors the temperature of the ambient air through the second thermometer T2. When the temperature difference between the two is between 10 and 30 degrees Celsius, the central processing device 30 opens the first valve V1, the second valve V2 and the third valve V3, and simultaneously introduces the three gases into the air chamber 20, and monitors when the temperature difference between the humid hot air and the hot air is less than 15 degrees Celsius, controls the ratio of the intake of humid hot air into the air chamber, the intake of ambient air into the air chamber and the intake of hot air into the air chamber to be 1:1:1 to 1:1.2:1, and when the temperature difference between the humid hot air and the hot air is greater than 15 degrees Celsius, controls the ratio of the intake of humid hot air into the air chamber, the intake of ambient air into the air chamber and the intake of hot air into the air chamber to be 1:1:1 to 1:1.2:1.2.

[0032] In the present invention, the principle that the hot and humid air discharged from the cooling tower is mixed with the hot air to reduce the emission of water mist can be referred to Figure 2In the figure, curve S1 represents the isenthalpy curve for moist hot air with a humidity of 100%, curve S2 represents the isenthalpy curve for moist hot air with a humidity of 80%, curve S3 represents the isenthalpy curve for moist hot air with a humidity of 60%, curve S4 represents the isenthalpy curve for moist hot air with a humidity of 40%, and curve S5 represents the isenthalpy curve for moist hot air with a humidity of 20%. Point B represents the saturated moist hot air in the packing, and point A represents the ambient air, i.e., the atmospheric state. The line connecting point B, the saturated moist hot air state of the packing, and point A, the ambient air state, is a straight line, which represents the mixed gas state line. The mixed gas state line, line BA, is above the isenthalpy curves, indicating a supersaturated state. Therefore, a large amount of water mist is generated outside the cooling tower's exhaust vent. This indicates that during the mixing of the exhaust gas and the atmosphere, water mist will not occur unless the exhaust gas passes through the supersaturated moist air region or a point on the saturated moist air curve. Therefore, when the ambient dry and cold air A is heated by the heat exchanger to form hot air and introduced into the air chamber, the temperature rises and becomes dry and hot air A'. When it is mixed with the saturated humid hot air B coming out of the filler, the mixed gas is point C. Point C is unsaturated air, and its dew point is greatly reduced. At this time, the change curve CA line of the mixed gas C when mixed with the ambient dry and cold air A is below the saturated air enthalpy and humidity diagram, no water vapor condensation is generated, and the water mist basically disappears, achieving the purpose of weakening and eliminating the water mist.

[0033] In this non-limiting embodiment, the heat exchanger is a fin-tube heat exchanger, which is suitable for heat exchange between water and gas, effectively improving heat exchange efficiency.

[0034] As another non-limiting embodiment, the mixed gas outlets are arranged at equal distances from each other, and each mixed gas outlet is also provided with a pressurizing nozzle that is communicated with the central processing equipment, so that the mixed air in the air chamber is discharged with a pressure of 2 to 2.5 atmospheres, and the mixed gas can be used for other purposes.

[0035] In addition, a filter dust collector 50 is provided between the exhaust port of the cooling tower and the first gas inlet of the air chamber, so as to remove dust and impurities in the hot and humid air discharged from the cooling tower, ensuring that the mixed gas used later does not contain impurities and avoiding secondary pollution.

[0036] Although the preferred embodiments of the present invention have been described in detail herein, it should be understood that the present invention is not limited to the specific structures and steps described and illustrated herein. Other modifications and variations may be implemented by those skilled in the art without departing from the spirit and scope of the present invention. Furthermore, the parameters of the present invention may be appropriately selected within the ranges disclosed herein based on the specific conditions of use.

Claims

1. A cooling tower system with a water mist regulating function, characterized in that: include: Heat exchangers, air chambers, and central processing equipment, among which, The heat exchanger comprises: a heat exchange shell, a low-temperature gas inlet, a high-temperature gas outlet, a high-temperature liquid inlet and a low-temperature liquid outlet, wherein the low-temperature gas inlet is connected to the ambient air, the high-temperature gas outlet is connected to the air chamber, the high-temperature liquid inlet is connected to the air conditioning hot water pool, and the low-temperature liquid outlet is connected to the air conditioning cooling water pool; The air chamber includes: an air chamber cavity, a first air inlet provided at the bottom of the air chamber cavity, a second air inlet and a third air inlet provided on the side wall of the air chamber cavity, and a plurality of mixed gas outlets provided on the top wall of the air chamber cavity, the first air inlet is connected to the exhaust port of the cooling tower to collect the hot and humid air discharged from the cooling tower, the second air inlet is connected to the ambient air to introduce the ambient air into the air chamber cavity, the third air inlet is connected to the high-temperature gas outlet of the heat exchanger to introduce the hot air into the air chamber cavity, the first gas inlet is provided with a first thermometer, a first valve and a first flowmeter to monitor the temperature of the hot and humid air and the flow rate of the air entering the air chamber in real time, the second gas inlet is provided with a second thermometer, a second valve and a second flowmeter to monitor the temperature of the ambient air and the flow rate of the air entering the air chamber in real time, the third gas inlet is provided with a third thermometer, a third valve and a third flowmeter to monitor the temperature of the hot air and the flow rate of the air entering the air chamber in real time, and each of the mixed gas outlets is provided with an air outlet valve; The central processing device is in communication with the first thermometer, the first valve, the first flowmeter, the second thermometer, the second valve, the second flowmeter, the third thermometer, the third valve, the third flowmeter, and the outlet valve; The temperature difference between the humid hot air and the hot air is set to 10-20 degrees, wherein the humid hot air temperature is higher than the hot air temperature, and the hot air temperature is higher than the ambient air temperature; When the central processing device monitors and obtains that the temperature difference between the hot and humid air and the ambient air is less than 10 degrees Celsius, the central processing device opens the first valve and the second valve, closes the third valve, and controls the ratio between the amount of the hot and humid air entering the air chamber and the amount of the ambient air entering the air chamber to be 1:1 to 1:1.5; When the central processing device monitors and obtains that the temperature difference between the humid hot air and the ambient air is greater than 30 degrees Celsius, the central processing device opens the first valve and the third valve, and closes the second valve. When the temperature difference between the humid hot air and the hot air is less than 15 degrees Celsius, the central processing device controls the ratio between the intake amount of the humid hot air into the air chamber and the intake amount of the hot air into the air chamber to be 1:1 to 1:1.

2. When the temperature difference between the humid hot air and the hot air is greater than 15 degrees Celsius, the central processing device controls the ratio between the intake amount of the humid hot air into the air chamber and the intake amount of the hot air into the air chamber to be 1:1.3 to 1:1.

5. When the central processing device monitors and obtains that the temperature difference between the humid hot air and the ambient air is 10~30 degrees Celsius, the central processing device opens the first valve, the second valve and the third valve, and monitors that when the temperature difference between the humid hot air and the hot air is less than 15 degrees Celsius, the central processing device controls the ratio of the intake volume of the humid hot air into the air chamber, the intake volume of the ambient air into the air chamber and the intake volume of the hot air into the air chamber to be 1:1~1.2:1; when the temperature difference between the humid hot air and the hot air is greater than 15 degrees Celsius, the central processing device controls the ratio of the intake volume of the humid hot air into the air chamber, the intake volume of the ambient air into the air chamber and the intake volume of the hot air into the air chamber to be 1:1~1.2:1~1.

2.

2. The cooling tower system with water mist regulating function according to claim 1, characterized in that: The heat exchanger is a fin-tube heat exchanger.

3. The cooling tower system with water mist regulating function according to claim 1, characterized in that: The plurality of mixed gas outlets are arranged at equal intervals from each other.

4. The cooling tower system with water mist regulating function according to claim 1, characterized in that: Each of the mixed gas outlets is further provided with a pressurizing nozzle that is in communication with the central processing device to discharge the mixed air in the gas chamber at a pressure of 2 to 2.5 atmospheres.

5. The cooling tower system with water mist regulating function according to claim 1, characterized in that: The invention also includes a filter dust collector arranged between the exhaust port of the cooling tower and the first gas inlet of the air chamber to remove dust and impurities in the hot and humid air discharged from the cooling tower.

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