CN106931799B - Cooling tower device with water replenishing and scale preventing functions and control method - Google Patents

Abstract

The invention provides a cooling tower device with water replenishment and anti-scaling functions. The cooling tower device includes a cooling water system, a rainwater collection and purification system, a control device, a water cooling unit, a temperature sensor and a fire water tank system; the cooling water system and The water-cooling unit is connected to the water-cooled unit for heat exchange; the rainwater collection and purification system is connected to the fire-fighting water tank system for supplying water to the fire-fighting water tank system; the fire-fighting water system is connected to the cooling water system for cooling water The system cools down; the temperature sensor is used to detect the temperature of the cooling water exchanging heat from the water cooling unit, and send a signal to the control device, which controls the operation of the entire system. The invention has the advantages that the scaling problem of the cooling tower can be alleviated, the heat exchange efficiency can be improved, and the operating cost can be reduced;

Description

A cooling tower device and control method with functions of replenishing water and anti-scaling

technical field

The invention relates to the technical field of cooling water, in particular to a cooling tower device and a control method with functions of water replenishment and scale prevention.

Background technique

With the continuous development of the economy and society, people have higher and higher requirements for the comfort of indoor space, which makes the central air conditioner that cooperates with the water-cooled unit and the cooling tower more and more popular. Therefore, the cooling tower has also been used on a large scale. At the same time, the fire water tank is an essential device for fire fighting. In the process of using the existing cooling tower and fire water tank, there are the following problems:

(1) The packing structure of the cooling tower is easy to scale. Studies have shown that the cooling water will heat up after heat exchange in the water-cooled unit, and the higher the temperature of the cooling water entering the cooling tower, the lower the scale inhibition rate, and the higher the scaling rate. Therefore, when the temperature of the water entering the cooling tower in the cooling water system is too high, it is not only easy to scale, but also reduces the heat exchange efficiency of the cooling tower, which in turn affects the operation effect of the entire air conditioning system, resulting in a large loss of operating costs.

(2) The fire water tank is not used for the rest of the time except when a fire occurs. Therefore, the fire water is generally static and non-fluid, which makes it easy to produce scale on the wall and bottom of the fire water tank, resulting in inconvenient cleaning and blockage in the later stage. pipeline.

(3) When the cooling tower is working, the heat exchange process between the air and the cooling water will take away a lot of water, which makes the cooling water system often need to replenish water, and the existing practice is usually through a large amount of tap water to replenish water, resulting in waste of water resources.

For the above-mentioned problems, some corresponding solutions are also proposed in the prior art. For example, the application date is: March 21, 2016, and the Chinese utility model patent with the application number: 201620219012.8 discloses a cooling tower filler descaling device, which can realize the self-cleaning of the cooling tower and avoid the cooling tower fillers. The efficiency of the heat exchanger decreases, but the water replenishment problem is not considered; another example, the Chinese utility model patent with the application date: 2013.12.03 and the application number: 201320788410.8 discloses a fire water tank cold storage system for a chilled water system. Although the cold storage capacity of the fire water tank is utilized, the scaling problem of the fire water tank is not considered.

Although the above technologies can improve certain aspects of the problem, they have not fundamentally and comprehensively solved the above problems. Therefore, how to fundamentally solve the problems of cooling tower scaling, water replenishment and fire water tank scaling has also become a top priority.

SUMMARY OF THE INVENTION

One of the technical problems to be solved by the present invention is to provide a cooling tower device with functions of replenishing water and anti-scaling, through which the problems of scaling of cooling towers, replenishing water and scaling of fire water tanks can be fundamentally solved.

The present invention achieves one of the technical problems in this way: a cooling tower device with water replenishment and anti-scaling functions, the cooling tower device includes a cooling water system, a rainwater collection and purification system, a control device, a water cooling unit, a temperature sensor and a fire water tank system;

The cooling water system includes a cooling tower, a spray water storage tank, a variable frequency spray water pump and a cooling water pump; the top of the cooling tower is connected to the water outlet side of the water cooling unit through a cooling tower return pipe, A first solenoid valve is provided at the water outlet end of the cooling tower return pipe; the bottom of the cooling tower is connected to the spray water storage tank through a cooling tower water supply pipe, and the water inlet end of the cooling tower water supply pipe is provided with There is a second solenoid valve; the cooling tower return pipe is connected with the cooling tower water supply pipe through a bypass pipe, and a third solenoid valve is arranged on the bypass pipe; the bottom of the spray water storage tank passes through a The water outlet pipe of the water storage tank is connected with the water inlet side of the water cooling unit, and the cooling water pump is arranged on the water outlet pipe of the water storage tank; the top of the cooling tower is also connected to the spray pipe through a secondary spray pipe. The shower tank is connected, and the variable frequency spray water pump is arranged on the secondary spray pipe;

The fire-fighting water tank system includes a fire-fighting water tank, an ejector, a fire-fighting pipe network and a first liquid level sensor; the ejector is arranged on the return pipe of the cooling tower, and the first liquid level sensor is arranged On the inner wall of the fire water tank; the lower part of the fire water tank is connected to the ejector through a fire water tank outlet pipe, and a fourth solenoid valve is arranged on the fire water tank outlet pipe; the fire pipe network is connected to The bottom of the fire fighting water tank is connected; the upper part of the fire fighting water tank is provided with a tap water supply pipe, and a fifth solenoid valve is arranged on the tap water supply pipe;

The rainwater collection and purification system is connected to the fire water tank; the temperature sensor is arranged on the cooling tower return pipe on the water outlet side of the water cooling unit; the first solenoid valve, the second solenoid valve, the third solenoid valve The valve, the fourth solenoid valve, the fifth solenoid valve, the variable frequency spray water pump, the cooling tower, the cooling water pump, the temperature sensor and the first liquid level sensor are all electrically connected to the control device.

Further, the rainwater collection and purification system includes a rainwater collection container, a rainwater delivery pump, and a second liquid level sensor; the upper part of the fire water tank is connected to the rainwater collection container through an overflow water pipe; the rainwater The lower part of the collection container is connected with the fire water tank through a rainwater conveying pipe, and the rainwater conveying pump is arranged on the rainwater conveying pipe; the second liquid level sensor is arranged on the inner wall of the rainwater collection container; Both the rainwater delivery pump and the second liquid level sensor are electrically connected to the control device.

Further, the spray water storage tank is arranged above the interior of the fire fighting water tank.

Further, an overflow drain pipe is arranged on the upper part of the spray water storage tank, and the overflow drain pipe is arranged at a position 5 cm higher than the normal liquid level of the fire water tank.

Further, the water cooling unit is arranged in the machine room, and the cooling tower, the rainwater collection container, the fire fighting water tank and the control device are all arranged on the roof.

The second technical problem to be solved by the present invention is to provide a cooling tower device control method with functions of replenishing water and anti-scaling, through which the problems of scaling of cooling towers, replenishing water and scaling of fire-fighting water tanks can be fundamentally solved.

The present invention achieves the second technical problem as follows: a cooling tower device control method with water replenishment and scale prevention functions, the method needs to use the above cooling tower device; the method includes:

Step 1. Set the high liquid level critical value Hx1 and the low liquid level critical value Hx2 of the fire water tank, test the actual liquid level value Hx in the fire water tank in real time through the first liquid level sensor, and compare Hx with Hx1 and Hx2 respectively, And if the first liquid level sensor continuously measures Hx<Hx2, it will start to replenish water to the fire water tank, and will not stop replenishing water until Hx reaches Hx1; if the first liquid level sensor continuously measures Hx>Hx1, start the fire protection The water tank is drained until Hx reaches Hx1; if the first liquid level sensor continuously measures Hx2≤Hx≤Hx1, water replenishment and drainage are not required;

Step 2. Set the high-load outlet water temperature critical value t1 and low-load outlet water temperature critical value t2 of the water-cooled unit, test the cooling water outlet temperature value t of the water-cooled unit in real time through the temperature sensor, and compare t with t1 and t2 respectively, and If the temperature sensor continuously measures t<t2, the cooling tower is controlled to stop, and the cooling water is cooled only by the heat exchange of the spray water storage tank; if the temperature sensor continuously measures t2≤t≤t1, the cooling tower is started at the same time and the water in the fire water tank to double cooling the cooling water; if the temperature sensor continuously measures t>t1, the cooling tower and the water in the fire water tank will be activated at the same time to double cool the cooling water;

Step 3. In the event of a fire, the cooling tower is controlled to stop by the control device, and the rainwater collection container, the tap water supply pipe and the spray water storage tank are controlled to supply water to the fire water tank at the same time.

Further, the step 1 is specifically:

Set the replenishment liquid level value Hyd of the rainwater collection container, and test the actual liquid level value Hy in the rainwater collection container in real time through the second liquid level sensor; set the high liquid level critical value Hx1 and the low liquid level critical value Hx2 of the fire water tank, and pass The first liquid level sensor tests the actual liquid level value Hx in the fire water tank in real time, compares Hx with Hx1 and Hx2 respectively, and selects one of the following three steps to execute according to the comparison result:

Step A1: If the first liquid level sensor continuously measures Hx<Hx2, it means that the fire water tank needs to be replenished. At this time, compare Hy and Hyd first, and if the second liquid level sensor continuously measures Hy≤Hyd, pass The control device controls the rainwater delivery pump to stop, and controls the opening of the fifth solenoid valve to replenish the fire water tank through the tap water replenishment pipe; at the same time, when the replenishment reaches Hx to Hx1, the control device controls the fifth solenoid valve to close to end the replenishment, and then Go to step 2;

If the second liquid level sensor continuously measures Hy>Hyd, the control device will control the rainwater delivery pump to start, and control the fifth solenoid valve to close, so as to replenish water to the fire water tank through the rainwater collection container; The control device controls the rainwater delivery pump to close to end the water replenishment, and then goes to step 2;

Step A2: If the first liquid level sensor continuously measures Hx>Hx1, it means that the fire water tank needs to be drained. At this time, the control device controls the rainwater delivery pump to stop, and controls the fifth solenoid valve to close, so as to drain the fire water tank through the overflow water pipe. The excess water in the water is discharged into the rainwater collection container, and the drainage is not stopped until Hx reaches Hx1, and then goes to step 2;

Step A3. If the first liquid level sensor continuously measures Hx2≤Hx≤Hx1, it means that the fire water tank does not need to be replenished and drained. At this time, the control device controls the rainwater delivery pump to stop, controls the fifth solenoid valve to close, and then enters the step 2.

Further, the step 2 is specifically:

Set the high-load outlet water temperature critical value t1 and low-load outlet water temperature critical value t2 of the water-cooled unit, test the cooling water outlet temperature value t of the water-cooled unit in real time through the temperature sensor, and compare t with t1 and t2 respectively, and according to the comparison results Choose one of the following three steps to perform:

Step B1. If the temperature sensor continuously measures t<t2, it means that the system is in a low-load working state. At this time, the temperature sensor sends a signal command to the control device; after the control device receives the signal command, it controls the low-frequency operation of the cooling water pump, and controls the first step. The first solenoid valve, the second solenoid valve and the fourth solenoid valve are closed, the third solenoid valve is controlled to open, and the cooling tower and the variable frequency spray water pump are controlled to stop;

At this time, the circulation of cooling water is as follows: under the low frequency operation of the cooling water pump, the cooling water in the spray storage tank enters the water cooling unit for heat exchange, and the cooling water after heat exchange flows back to the spray storage tank through the bypass pipe At the same time, the fire water in the fire water tank is in contact with the wall surface of the spray water storage tank for heat exchange, thereby reducing the temperature of the cooling water in the spray water storage tank, and then entering step 3;

Step B2, if the temperature sensor continuously measures t2≤t≤t1, it means that the system is in a medium-load working state. At this time, the temperature sensor sends a signal command to the control device; after the control device receives the signal command, it controls the cooling water pump to run at an intermediate frequency, Control the first solenoid valve, the second solenoid valve and the fourth solenoid valve to open, control the third solenoid valve to close, control the cooling tower to work and control the variable frequency spray water pump to work at low frequency;

At this time, the circulation of cooling water is as follows: under the medium frequency operation of the cooling water pump, the cooling water in the spray water storage tank enters the water-cooling unit for heat exchange, and the cooling water after heat exchange flows through the ejector. The fire-fighting water extracted from the fire-fighting water tank is mixed for cooling; then when the cooling water flows through the top of the cooling tower, it is mixed with the cooling water pumped by the variable frequency spray pump at a low frequency to cool down again; finally, the cooling water enters the cooling tower for cooling, and passes through the cooling tower. The cooling tower water supply pipe flows back to the spray water storage tank, and then goes to step 3;

Step B3, if the temperature sensor continuously measures t>t1, it means that the system is in a high-load working state. At this time, the temperature sensor sends a signal command to the control device; after the control device receives the signal command, it controls the high-frequency operation of the cooling water pump to control the operation of the cooling water pump. The first solenoid valve, the second solenoid valve and the fourth solenoid valve are opened, the third solenoid valve is controlled to be closed, and the cooling tower is controlled to work and the variable frequency spray water pump is controlled to work at a high frequency;

At this time, the circulation of cooling water is as follows: under the high-frequency operation of the cooling water pump, the cooling water in the spray water storage tank enters the water cooling unit for rapid heat exchange, and the cooling water after heat exchange flows through the ejector. Mix and cool with the fire-fighting water drawn from the fire-fighting water tank; then when the cooling water flows through the top of the cooling tower, it is mixed with the cooling water pumped by the variable frequency spray pump at high frequency to cool down again; finally, the cooling water enters the cooling tower for cooling , and flow back to the spray water storage tank through the cooling tower water supply pipe, and then go to step 3.

Further, the step 3 is specifically:

In the event of a fire, the high-frequency operation of the cooling water pump is controlled by the control device, the first solenoid valve, the second solenoid valve and the fourth solenoid valve are controlled to close, the third solenoid valve is controlled to open, and the cooling tower and the variable frequency spray water pump are controlled to stop. The cooling water is quickly pumped to the spray storage tank by the cooling water pump, and the fire water tank is replenished by the overflow drain pipe on the spray storage tank;

At the same time, the control device controls the operation of the rainwater delivery pump and controls the opening of the fifth solenoid valve, so as to supply water to the fire water tank through the rainwater collection container and the tap water supply pipe.

The present invention has the following advantages:

1. During operation, the working mode of the system can be adjusted in real time according to the temperature change of the cooling water monitored, so that the temperature of the cooling water after heat exchange is reduced before entering the cooling tower, which can reduce the scaling of the cooling tower. At the same time, the water in the fire water tank can be kept in a flowing state, which can not only effectively prevent the scaling phenomenon on the wall and bottom of the fire water tank, but also indirectly realize the function of energy saving.

2. In actual use, the water-cooled unit can be efficiently heat exchanged to ensure the efficient and normal operation of the water-cooled unit.

3. The collected rainwater resources can be fully utilized to replenish water, which can reduce the waste of tap water resources.

4. In the event of a fire, the fire water tank can be replenished through multiple channels to ensure that there is sufficient water source in the fire water tank, which will help the fire rescue work to proceed smoothly and reduce the harm caused by the fire.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

FIG. 1 is a schematic block diagram of a cooling tower device with water replenishing and anti-scaling functions according to the present invention.

Fig. 2 is a flow chart of replenishing water to a fire water tank in the present invention.

Fig. 3 is the working flow chart of the water cooling unit in the present invention.

Description of reference numbers:

100-cooling tower device, 1-cooling water system, 2-rainwater collection and purification system, 3-control device, 4-water cooling unit, 5-temperature sensor, 6-fire water tank system, 11-cooling tower, 12-spray storage Water tank, 121-overflow drain pipe, 13-inverter spray water pump, 14-cooling water pump, 15-cooling tower return water pipe, 151-first solenoid valve, 16-cooling tower water supply pipe, 161-second solenoid valve, 17-bypass pipe, 171-third solenoid valve, 18-water storage tank outlet pipe, 19-secondary spray pipe, 21-rainwater collection container, 22-rainwater delivery pump, 23-second liquid level sensor, 24 - Overflow water pipe, 25- Rainwater delivery pipe, 61- Fire water tank, 62- Ejector, 63- Fire pipe network, 64- First liquid level sensor, 65- Fire water tank outlet pipe, 651- Fourth solenoid valve, 66- tap water supply pipe, 661- fifth solenoid valve.

Detailed ways

Please refer to FIG. 1 , a preferred embodiment of a cooling tower device 100 with water replenishment and anti-scaling functions of the present invention. The cooling tower device includes a cooling water system 1 , a rainwater collection and purification system 2 , and a control device 3. A water cooling unit 4, a temperature sensor 5 and a fire water tank system 6;

The cooling water system 1 includes a cooling tower 11, a spray water storage tank 12, a variable frequency spray water pump 13 and a cooling water pump 14; the top of the cooling tower 11 is connected to the water cooling tower through a cooling tower return pipe 15. The water outlet side of the unit 4 is connected, and a first solenoid valve 151 is provided at the water outlet end of the cooling tower return pipe 15. When the first solenoid valve 151 is opened, the cooling water from the water cooling unit 4 can be cooled by cooling The tower return pipe 15 is sent to the cooling tower 11 for cooling; the bottom of the cooling tower 11 is connected to the spray water storage tank 12 through a cooling tower water supply pipe 16, and the water inlet end of the cooling tower water supply pipe 16 A second solenoid valve 161 is provided. When the second solenoid valve 161 is opened, the cooling water passing through the cooling tower 11 can be transported to the spray water storage tank 12; The cooling tower water supply pipe 16 is connected, and the bypass pipe 17 is provided with a third solenoid valve 171. During implementation, if the first solenoid valve 151 and the second solenoid valve 161 are closed, the third solenoid valve 171 is opened at the same time. , the cooling water exchanged from the water cooling unit 4 can be directly transported to the spray water storage tank 12. Under this working condition, scaling caused by the cooling water passing through the cooling tower 11 can be avoided in essence. The problem is solved, and the function of energy saving can be realized indirectly; the bottom of the spray water storage tank 12 is connected to the water inlet side of the water cooling unit 4 through a water storage tank outlet pipe 18, and the cooling water pump 14 is arranged in the On the water outlet pipe 18 of the water storage tank, during operation, the cooling water pump can be sent to the water cooling unit 4 for cooling through the cooling water pump 14; the top of the cooling tower 11 is also connected with the spraying The water storage tank 12 is connected, and the variable frequency spray water pump 13 is arranged on the secondary spray pipe 19. When the variable frequency spray water pump 13 is turned on, the cooling water in the spray water storage tank 12 can be delivered to the The top of the cooling tower 11 is mixed with the cooling water after heat exchange, so that the temperature of the cooling water entering the cooling tower 11 is reduced, and the lower the temperature of the cooling water, the higher the scale inhibition rate of the cooling water, and the corresponding scaling rate. The lower it is, which helps to substantially reduce the fouling problem caused by the heat exchange of cooling water through the cooling tower 11 .

The fire-fighting water tank system 6 includes a fire-fighting water tank 61, an ejector 62, a fire-fighting pipe network 63 and a first liquid level sensor 64; the ejector 62 is arranged on the cooling tower return pipe 15, the The ejector 62 is used to eject the fire-fighting water in the fire-fighting water tank 61 to mix with the cooling water after heat exchange, and the first liquid level sensor 64 is arranged on the inner wall of the fire-fighting water tank 61 for real-time detection of the fire-fighting water tank 61 The lower part of the fire water tank 61 is connected to the ejector 62 through a fire water tank outlet pipe 65, and the fire water tank outlet pipe 65 is provided with a fourth solenoid valve 651, when the fourth solenoid valve is turned on When the valve 651 is installed, the fire fighting water in the fire fighting water tank 61 can be ejected and mixed with the cooling water after heat exchange; the fire fighting pipe network 63 is connected with the bottom of the fire fighting water tank 61, so as to facilitate the fire fighting in the event of a fire. Start the fire in time; the upper part of the fire water tank 61 is provided with a tap water replenishment pipe 66, and the tap water replenishment pipe 66 is provided with a fifth solenoid valve 661, when the fifth solenoid valve 661 is opened, it can go to the fire water tank 61. Replenish water source.

The rainwater collection and purification system 2 is connected to the fire fighting water tank 61. During specific implementation, the rainwater collection and purification system 2 can also be used to supplement the water source to the fire fighting water tank 61; the temperature sensor 5 is arranged at the water outlet of the water cooling unit 4. On the cooling tower return pipe 15 on the side of the cooling tower, the temperature sensor 5 is used to test the temperature of the cooling water flowing out from the water outlet side of the water cooling unit 4 in real time; the first solenoid valve 151, the second solenoid valve 161, the third solenoid valve 171 , the fourth solenoid valve 651 , the fifth solenoid valve 661 , the variable frequency spray water pump 13 , the cooling tower 11 , the cooling water pump 14 , the temperature sensor 5 and the first liquid level sensor 64 are all electrically connected to the control device 3 .

The rainwater collection and purification system 2 includes a rainwater collection container 21, a rainwater delivery pump 22, and a second liquid level sensor 23; the upper part of the fire water tank 61 is connected to the rainwater collection container 21 through an overflow water pipe 24 , when the water volume of the fire water tank 61 is too much, the excess water can be discharged into the rainwater collection container 21 through the overflow water pipe 24, so that it can be used when needed; The fire water tank 61 is connected, and the rainwater delivery pump 22 is arranged on the rainwater delivery pipe 25. When it is necessary to replenish water to the firefighting water tank 61 through the rainwater collection container 21, the rainwater delivery pump 22 is turned on; the second The liquid level sensor 23 is arranged on the inner wall of the rainwater collection container 21, and is used to test the liquid level in the rainwater collection container 21 in real time; the rainwater delivery pump 22 and the second liquid level sensor 23 are both electrically connected to the control device 3. connect.

The spray water storage tank 12 is arranged above the interior of the fire fighting water tank 61 . In specific implementation, the spray water tank 12 can be fixed on the inner wall of the fire water tank 61. During operation, the fire water in the fire water tank 61 can be in contact with the wall of the spray water tank 12 for heat exchange to reduce cooling. water temperature.

An overflow drain pipe 121 is arranged on the upper part of the spray water storage tank 12 , and the overflow drain pipe 121 is arranged at a position 5 cm higher than the normal liquid level of the fire water tank 61 . In this way, when the amount of water in the spray water tank 12 is relatively large, the excess water can be discharged into the fire water tank 61 through the overflow drain pipe 121 .

The water cooling unit 4 is arranged in a machine room (not shown), and the cooling tower 11 , the rainwater collection container 21 , the fire water tank 61 and the control device 3 are all arranged on the roof (not shown).

Please refer to FIG. 1 to FIG. 3 , a method for controlling a cooling tower device with water replenishment and anti-scaling functions according to the present invention requires the use of the above-mentioned cooling tower device 100 ; the method includes:

Step 1. Set the high liquid level critical value Hx1 and the low liquid level critical value Hx2 of the fire fighting water tank 61, test the actual liquid level value Hx in the fire fighting water tank 61 in real time through the first liquid level sensor 64, and compare Hx with Hx1 and Hx2 respectively. For comparison, and if the first liquid level sensor 64 continuously measures Hx<Hx2, the fire water tank 61 will be started to replenish water, and will not stop replenishing water until Hx reaches Hx1; if the first liquid level sensor 64 continuously measures Hx> Hx1, start to drain the fire water tank 61, and stop draining water until Hx reaches Hx1; if the first liquid level sensor 64 continuously measures Hx2≤Hx≤Hx1, then water replenishment and drainage are not required;

Step 2. Set the high-load outlet water temperature critical value t1 and low-load outlet water temperature critical value t2 of the water-cooled unit 4, test the cooling water outlet temperature value t of the water-cooled unit 4 in real time through the temperature sensor 5, and compare t with t1 and t2 respectively. Comparison, and if the temperature sensor 5 continuously measures t<t2, the cooling tower 11 is controlled to stop, and the cooling water is cooled only by the heat exchange of the spray water storage tank 12; if the temperature sensor 5 continuously measures t2≤t≤ t1, simultaneously start the water in the cooling tower 11 and the fire water tank 61 to double-cool the cooling water; if the temperature sensor 5 continuously measures t>t1, simultaneously start the water in the cooling tower 11 and the fire water tank 61 to cool the cooling water. double cooling;

Step 3. In the event of a fire, the control device 3 controls the cooling tower to stop 11, and controls the rainwater collection container 21, the tap water supply pipe 66 and the spray water storage tank 12 to supply water to the fire water tank 61 at the same time.

in,

Please focus on referring to Figure 2, the step 1 is specifically:

Set the replenishment liquid level value Hyd of the rainwater collection container 21, and test the actual liquid level value Hy in the rainwater collection container 21 in real time through the second liquid level sensor 23; set the high liquid level critical value Hx1 and the low liquid level critical value of the fire water tank 61 The water level state of the fire water tank 61 can be divided into "low water level state", "stable water level state" and "high water level state", and the actual liquid level value in the fire water tank 61 can be tested in real time through the first liquid level sensor 64 Hx, and compare Hx with Hx1 and Hx2 respectively, and select one of the following three steps to execute according to the comparison result:

Step A1, if the first liquid level sensor 64 continuously measures Hx<Hx2, it means that the fire water tank 61 needs to be replenished, that is, the fire water tank 61 is in a "low water level state". The second liquid level sensor 23 continuously measures Hy≤Hyd, then the control device 3 controls the rainwater delivery pump 22 to stop, and controls the fifth solenoid valve 661 to open, so as to replenish the fire water tank 61 through the tap water replenishment pipe 66; When Hx1 is reached, the control device 3 controls the fifth solenoid valve 661 to close to end the water replenishment, and then proceeds to step 2;

If the second liquid level sensor 23 continuously measures Hy>Hyd, the control device 3 controls the rainwater delivery pump 22 to start, and controls the fifth solenoid valve 661 to close, so as to replenish water to the fire water tank 61 through the rainwater collection container 21; When Hx reaches Hx1, the control device 3 controls the rainwater delivery pump 22 to close to end the water replenishment, and then enters step 2;

Step A2, if the first liquid level sensor 64 continuously measures Hx>Hx1, it means that the fire water tank 61 needs to be drained, that is, the fire water tank 61 is in a "high water level state", at this time, the control device 3 controls the rainwater delivery pump 22 to stop, Control the fifth solenoid valve 661 to close, so as to discharge the excess water in the fire water tank 61 into the rainwater collection container 21 through the overflow water pipe 24, and stop the water drainage until Hx reaches Hx1, and then enter step 2;

Step A3, if the first liquid level sensor 64 continuously measures Hx2≤Hx≤Hx1, it means that the fire water tank 61 does not need to be replenished and drained, that is, the fire water tank 61 is in a "stable water level state", and the rainwater is controlled by the control device 3 at this time. The delivery pump 22 is stopped, and the fifth solenoid valve 661 is controlled to be closed. At the same time, after the fire fighting water is injected and mixed with the cooling water, the cooling water entering the spray water storage tank 12 will be too much, and at this time, the excess water can be discharged to the fire fighting water tank through the overflow drain pipe 121 61 to ensure that the water level of the fire water tank 61 can be maintained stable, and then proceed to step 2.

For example, set the replenishment level value of the rainwater collection container 21 to 0.2m; set the high liquid level critical value of the fire water tank 61 to 1.9m and the low liquid level critical value to 1.6m;

At this time, if the first liquid level sensor 64 continuously measures Hx<1.6m, and the second liquid level sensor 23 continuously measures Hy≤0.2m, the control device 3 controls the tap water replenishment pipe 66 to replenish the fire water tank 61, and The water supply stops when Hx=1.9m; if the second liquid level sensor 23 continuously measures Hy>0.2m, the control device 3 controls the rainwater collection container 21 to supply water to the fire water tank 61, and stops when the water supply reaches Hx=1.9m;

If the first liquid level sensor 64 continuously measures Hx>1.9m, the control device 3 controls the overflow water pipe 24 to discharge the excess water in the fire water tank 61 into the rainwater collection container 21, and stops when the water is drained to Hx=1.9m ; If the first liquid level sensor 64 continuously measures 1.6m≤Hx≤1.9m, no water is drained or replenished at this time.

Please focus on referring to Figure 3, the step 2 is specifically:

Set the high-load outlet water temperature critical value t1 and low-load outlet water temperature critical value t2 of the water-cooled unit 4, and the working status of the water-cooled unit 4 can be divided into "low-load working status", "medium-load working status" and "high-load working status" state”, the temperature value t of the cooling water outlet water of the water-cooling unit 4 is tested in real time by the temperature sensor 5, and t is compared with t1 and t2 respectively, and one of the following three steps is selected to execute according to the comparison result:

Step B1, if the temperature sensor 5 continuously measures t<t2, it means that the system is in a low-load working state, that is, the water-cooling unit 4 is in a "low-load working state", and the temperature sensor 5 sends a signal command to the control device 3 at this time; control; After receiving the signal command, the device 3 controls the cooling water pump 14 to operate at a low frequency, controls the first solenoid valve 151, the second solenoid valve 161 and the fourth solenoid valve 651 to close, controls the third solenoid valve 171 to open, and simultaneously controls the cooling tower 11 and the inverter. The spray pump 13 stops;

At this time, the circulation of the cooling water is as follows: under the low frequency operation of the cooling water pump 14, the cooling water in the spray water storage tank 12 enters the water cooling unit 4 for heat exchange, and the cooling water after heat exchange flows through the bypass pipe 17 and returns to the sprayer In the shower storage tank 12, at the same time, the fire-fighting water in the fire fighting water tank 61 is in contact with the wall surface of the spray storage tank 12 for heat exchange, thereby reducing the temperature of the cooling water in the spray storage tank 12, and then entering step 3;

Since the cooling load of the water-cooling unit 4 is relatively low at this time and the required amount of cooling water is relatively small, the cooling water pump 14 is operated at a low frequency. At the same time, under this working condition, the cooling water does not need to pass through the cooling tower 11 for cooling, which can essentially avoid the scaling problem caused by the heat exchange of the cooling water through the cooling tower 11, and can indirectly realize the function of energy saving.

Step B2. If the temperature sensor 5 continuously measures t2≤t≤t1, it means that the system is in a medium-load working state, that is, the water-cooling unit 4 is in a "medium-load working state", and the temperature sensor 5 sends a signal instruction to the control device 3 at this time. After the control device 3 receives the signal command, it controls the cooling water pump 14 to run at an intermediate frequency, controls the first solenoid valve 151, the second solenoid valve 161 and the fourth solenoid valve 651 to open, controls the third solenoid valve 171 to close, and controls the cooling tower 11 Work and control the frequency conversion spray pump 13 to work at low frequency;

At this time, the circulation of the cooling water is as follows: under the intermediate frequency operation of the cooling water pump 14 , the cooling water in the spray water storage tank 12 enters the water cooling unit 4 for heat exchange, and the cooling water after heat exchange flows through the ejector 62 . , first mix and cool with the fire-fighting water drawn from the fire-fighting water tank 61; then when the cooling water flows through the top of the cooling tower 11, it is mixed with the cooling water pumped by the variable frequency spray water pump 13 at a low frequency to cool down again; finally, the cooling water enters the cooling Cooling is carried out in the tower 11, and flows back to the spray water storage tank 12 through the cooling tower water supply pipe 16, and then enters step 3;

Since the cooling load of the water-cooling unit 4 is high at this time and the required amount of cooling water is also relatively large, the cooling water pump 14 is operated at an intermediate frequency. Under this working condition, the heat-exchanged cooling water can be double cooled by the cooling tower 11 and the fire-fighting water in the fire-fighting water tank 61, and under the lifting of the variable frequency spray pump 13, the heat-exchanged cooling water can be cooled in the cooling tower 11 is mixed and cooled again, which helps to reduce the temperature of the cooling water entering the cooling tower 11, and the lower the temperature of the cooling water, the higher the scaling inhibition rate of the cooling water, and the lower the scaling rate accordingly, so it can be The scaling problem caused by the heat exchange of cooling water through the cooling tower 11 is substantially alleviated. At the same time, since the water in the fire water tank 61 is in a flowing state at this time, the accumulation of impurities at the bottom of the fire water tank 61 can be avoided first; secondly, under the shear force of the water flow, scale is not easily generated, which can reduce the long-term damage of the fire water tank 61 in traditional buildings. The phenomenon of limescale spreading and inconvenient cleaning caused by non-working.

Step B3, if the temperature sensor 5 continuously measures t>t1, it means that the system is in a high-load working state, that is, the water-cooling unit 4 is in a "high-load working state", at this time, the temperature sensor 5 sends a signal command to the control device 3; control; After receiving the signal command, the device 3 controls the cooling water pump 14 to run at high frequency, controls the first solenoid valve 151, the second solenoid valve 161 and the fourth solenoid valve 651 to open, controls the third solenoid valve 171 to close, and controls the cooling tower 11 to work at the same time And control the frequency conversion spray pump 13 to work at high frequency;

At this time, the circulation of the cooling water is as follows: under the high-frequency operation of the cooling water pump 14, the cooling water in the spray water storage tank 12 enters the water cooling unit 4 for rapid heat exchange, and the cooling water after heat exchange flows through the ejector At 62:00, it is first mixed with the fire-fighting water drawn from the fire-fighting water tank 61 to cool down; then when the cooling water flows through the top of the cooling tower 11, it is mixed with the cooling water pumped by the variable frequency spray water pump 13 at high frequency to cool down again; The water enters the cooling tower 11 for cooling, and flows back to the spray water storage tank 12 through the cooling tower water supply pipe 16, and then enters step 3;

Since the cooling load of the water-cooling unit 4 is very high at this time and the required amount of cooling water is also large, the cooling water pump 14 is operated at a high frequency. Under this condition, because the cooling water pump 14 operates at a high frequency, the cooling water flow rate increases, which can shorten the heat exchange time between the cooling water and the water cooling unit 4, thereby reducing the temperature of the cooling water after heat exchange, and due to the cooling water flow rate Therefore, the flow rate of the ejected fire fighting water is also increased, so as to achieve a better cooling effect. At this time, the heat-exchanged cooling water can also be double-cooled by the cooling tower 11 and the fire-fighting water of the fire-fighting water tank 61, and under the promotion of the high-frequency operation of the variable frequency spray pump 13, the heat-exchanged cooling water can be cooled in the cooling tower. 11 is mixed and cooled again, which helps to reduce the temperature of the cooling water entering the cooling tower 11, and the lower the temperature of the cooling water, the higher the scaling inhibition rate of the cooling water, and the lower the scaling rate accordingly, so it can be The scaling problem caused by the heat exchange of cooling water through the cooling tower 11 is substantially alleviated. At the same time, because the water in the fire water tank 61 is in a fast-flowing state at this time, the accumulation of impurities at the bottom of the fire water tank 61 can be avoided first; secondly, under the shear force of the water flow, scale is not easily generated, which can reduce the problem of the fire water tank 61 in traditional buildings. Long-term non-working results in scale spread and inconvenient cleaning.

For example, set the critical value of high-load outlet water temperature to 34°C and the critical value of low-load outlet water temperature to 29°C for water-cooling unit 4;

At this time, if the temperature sensor 5 continuously measures t<29°C, the control device 3 controls the cooling water pump 14 to operate at a low frequency, controls the first solenoid valve 151, the second solenoid valve 161 and the fourth solenoid valve 651 to close, and controls the third solenoid valve The valve 171 is opened, and the cooling tower 11 and the variable frequency spray water pump 13 are controlled to stop at the same time;

If the temperature sensor 5 continuously measures 29°C≤t≤34°C, the control device 3 controls the cooling water pump 14 to run at an intermediate frequency, controls the first solenoid valve 151, the second solenoid valve 161 and the fourth solenoid valve 651 to open, and controls the third solenoid valve The valve 171 is closed, while the cooling tower 11 is controlled to work and the variable frequency spray water pump 13 is controlled to work at a low frequency;

If the temperature sensor 5 continuously measures t>34°C, the control device 3 controls the cooling water pump 14 to run at high frequency, controls the first solenoid valve 151 , the second solenoid valve 161 and the fourth solenoid valve 651 to open, and controls the third solenoid valve 171 Turn off, and control the cooling tower 11 to work and control the variable frequency spray water pump 13 to work at high frequency.

The step 3 is specifically:

In the event of a fire, the control device 3 controls the cooling water pump 14 to operate at high frequency, controls the first solenoid valve 151, the second solenoid valve 161 and the fourth solenoid valve 651 to close, controls the third solenoid valve 171 to open, controls the cooling tower 11 and The variable frequency spray water pump 13 is stopped to quickly pump the cooling water to the spray water storage tank 12 through the cooling water pump 14, and the fire water tank 61 is replenished by the overflow drain pipe 121 on the spray water storage tank 12; at the same time, The control device 3 controls the rainwater delivery pump 22 to work and controls the fifth solenoid valve 661 to open, so as to supply water to the fire water tank 61 through the rainwater collection container 21 and the tap water supply pipe 66 . Therefore, in the event of a fire, multi-channel water supply can be used to ensure sufficient water supply for the fire-fighting pipe network 63 and reduce fire hazards.

In a word, the present invention has the following beneficial effects:

1. During operation, the working mode of the system can be adjusted in real time according to the temperature change of the cooling water monitored, so that the temperature of the cooling water after heat exchange is reduced before entering the cooling tower, which can reduce the scaling of the cooling tower. At the same time, the water in the fire water tank can be kept in a flowing state, which can not only effectively prevent the scaling phenomenon on the wall and bottom of the fire water tank, but also indirectly realize the function of energy saving.

2. In actual use, the water-cooled unit can be efficiently heat exchanged to ensure the efficient and normal operation of the water-cooled unit.

3. The collected rainwater resources can be fully utilized to replenish water, which can reduce the waste of tap water resources.

4. In the event of a fire, the fire water tank can be replenished through multiple channels to ensure that there is sufficient water source in the fire water tank, which will help the fire rescue work to proceed smoothly and reduce the harm caused by the fire.

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments we describe are only illustrative, rather than used to limit the scope of the present invention. Equivalent modifications and changes made by a skilled person in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims (7)

1. A cooling tower device with water replenishing and anti-scaling functions, characterized in that: the cooling tower device comprises a cooling water system, a rainwater collection and purification system, a control device, a water cooling unit, a temperature sensor and a fire protection water tank system; The cooling water system includes a cooling tower, a spray water storage tank, a variable frequency spray water pump and a cooling water pump; the top of the cooling tower is connected to the water outlet side of the water cooling unit through a cooling tower return pipe, A first solenoid valve is provided at the water outlet end of the cooling tower return pipe; the bottom of the cooling tower is connected to the spray water storage tank through a cooling tower water supply pipe, and the water inlet end of the cooling tower water supply pipe is provided with There is a second solenoid valve; the cooling tower return pipe is connected with the cooling tower water supply pipe through a bypass pipe, and a third solenoid valve is arranged on the bypass pipe; the bottom of the spray water storage tank passes through a The water outlet pipe of the water storage tank is connected with the water inlet side of the water cooling unit, and the cooling water pump is arranged on the water outlet pipe of the water storage tank; the top of the cooling tower is also connected to the spray pipe through a secondary spray pipe. The shower tank is connected, and the variable frequency spray water pump is arranged on the secondary spray pipe; The fire-fighting water tank system includes a fire-fighting water tank, an ejector, a fire-fighting pipe network and a first liquid level sensor; the ejector is arranged on the return pipe of the cooling tower, and the first liquid level sensor is arranged On the inner wall of the fire water tank; the lower part of the fire water tank is connected to the ejector through a fire water tank outlet pipe, and a fourth solenoid valve is arranged on the fire water tank outlet pipe; the fire pipe network is connected to The bottom of the fire fighting water tank is connected; the upper part of the fire fighting water tank is provided with a tap water supply pipe, and a fifth solenoid valve is arranged on the tap water supply pipe; The rainwater collection and purification system is connected to the fire water tank; the temperature sensor is arranged on the cooling tower return pipe on the water outlet side of the water cooling unit; the first solenoid valve, the second solenoid valve, the third solenoid valve The valve, the fourth solenoid valve, the fifth solenoid valve, the variable frequency spray water pump, the cooling tower, the cooling water pump, the temperature sensor and the first liquid level sensor are all electrically connected to the control device; The rainwater collection and purification system includes a rainwater collection container, a rainwater delivery pump, and a second liquid level sensor; the upper part of the fire water tank is connected to the rainwater collection container through an overflow water pipe; the rainwater collection container is The lower part is connected with the fire water tank through a rainwater conveying pipe, and the rainwater conveying pump is arranged on the rainwater conveying pipe; the second liquid level sensor is arranged on the inner wall of the rainwater collection container; the rainwater conveying Both the pump and the second liquid level sensor are electrically connected to the control device; The spray water storage tank is arranged above the interior of the fire fighting water tank. 2. A cooling tower device with water replenishment and anti-scaling functions according to claim 1, characterized in that: an overflow drain pipe is arranged on the upper part of the spray water storage tank, and the overflow drain pipe is arranged in the 5cm above the normal liquid level of the fire water tank. 3. A cooling tower device with water replenishing and anti-scaling functions according to claim 1, characterized in that: the water cooling unit is arranged in the machine room, and the cooling tower, the rainwater collection container, the fire fighting water tank and the control device are all installed in the machine room. Set on the roof. 4. A cooling tower device control method with water replenishment and anti-scaling functions, characterized in that: the method needs to use the cooling tower device according to any one of claims 1 to 3; the method comprises: Step 1. Set the high liquid level critical value Hx1 and the low liquid level critical value Hx2 of the fire water tank, test the actual liquid level value Hx in the fire water tank in real time through the first liquid level sensor, and compare Hx with Hx1 and Hx2 respectively, And if the first liquid level sensor continuously measures Hx<Hx2, it will start to replenish water to the fire water tank, and will not stop replenishing water until Hx reaches Hx1; if the first liquid level sensor continuously measures Hx>Hx1, start the fire protection The water tank is drained until Hx reaches Hx1; if the first liquid level sensor continuously measures Hx2≤Hx≤Hx1, water replenishment and drainage are not required; Step 2. Set the high-load outlet water temperature critical value t1 and low-load outlet water temperature critical value t2 of the water-cooled unit, test the cooling water outlet temperature value t of the water-cooled unit in real time through the temperature sensor, and compare t with t1 and t2 respectively, and If the temperature sensor continuously measures t<t2, the cooling tower is controlled to stop, and the cooling water is cooled only by the heat exchange of the spray water storage tank; if the temperature sensor continuously measures t2≤t≤t1, the cooling tower is started at the same time and the water in the fire water tank to double cooling the cooling water; if the temperature sensor continuously measures t>t1, the cooling tower and the water in the fire water tank will be activated at the same time to double cool the cooling water; Step 3. In the event of a fire, the cooling tower is controlled to stop by the control device, and the rainwater collection container, the tap water supply pipe and the spray water storage tank are controlled to supply water to the fire water tank at the same time. 5. A cooling tower device control method with water replenishing and anti-scaling functions according to claim 4, characterized in that: the step 1 is specifically: Set the replenishment liquid level value Hyd of the rainwater collection container, and test the actual liquid level value Hy in the rainwater collection container in real time through the second liquid level sensor; set the high liquid level critical value Hx1 and the low liquid level critical value Hx2 of the fire water tank, and pass The first liquid level sensor tests the actual liquid level value Hx in the fire water tank in real time, compares Hx with Hx1 and Hx2 respectively, and selects one of the following three steps to execute according to the comparison result: Step A1. If the first liquid level sensor continuously measures Hx<Hx2, it means that the fire water tank needs to be replenished. At this time, compare Hy and Hyd first, and if the second liquid level sensor continuously measures Hy≤Hyd, pass the test. The control device controls the rainwater delivery pump to stop, and controls the opening of the fifth solenoid valve to replenish the fire water tank through the tap water replenishment pipe; at the same time, when the replenishment reaches Hx to Hx1, the control device controls the fifth solenoid valve to close to end the replenishment, and then Go to step 2; If the second liquid level sensor continuously measures Hy>Hyd, the control device will control the rainwater delivery pump to start, and control the fifth solenoid valve to close, so as to replenish water to the fire water tank through the rainwater collection container; The control device controls the rainwater delivery pump to close to end the water replenishment, and then goes to step 2; Step A2: If the first liquid level sensor continuously measures Hx>Hx1, it means that the fire water tank needs to be drained. At this time, the control device controls the rainwater delivery pump to stop, and controls the fifth solenoid valve to close, so as to drain the fire water tank through the overflow water pipe. The excess water in the water is discharged into the rainwater collection container, and the drainage is not stopped until Hx reaches Hx1, and then goes to step 2; Step A3. If the first liquid level sensor continuously measures Hx2≤Hx≤Hx1, it means that the fire water tank does not need to be replenished and drained. At this time, the control device controls the rainwater pump to stop, controls the fifth solenoid valve to close, and then enters the step 2. 6. A cooling tower device control method with water replenishing and anti-scaling functions according to claim 4, characterized in that: the step 2 is specifically: Set the high-load outlet water temperature critical value t1 and low-load outlet water temperature critical value t2 of the water-cooled unit, test the cooling water outlet temperature value t of the water-cooled unit in real time through the temperature sensor, and compare t with t1 and t2 respectively, and according to the comparison results Choose one of the following three steps to perform: Step B1. If the temperature sensor continuously measures t<t2, it means that the system is in a low-load working state. At this time, the temperature sensor sends a signal command to the control device; after the control device receives the signal command, it controls the low-frequency operation of the cooling water pump, and controls the first step. The first solenoid valve, the second solenoid valve and the fourth solenoid valve are closed, the third solenoid valve is controlled to open, and the cooling tower and the variable frequency spray water pump are controlled to stop; At this time, the circulation of cooling water is as follows: under the low frequency operation of the cooling water pump, the cooling water in the spray storage tank enters the water cooling unit for heat exchange, and the cooling water after heat exchange flows back to the spray storage tank through the bypass pipe At the same time, the fire water in the fire water tank is in contact with the wall surface of the spray water storage tank for heat exchange, thereby reducing the temperature of the cooling water in the spray water storage tank, and then entering step 3; Step B2, if the temperature sensor continuously measures t2≤t≤t1, it means that the system is in a medium-load working state. At this time, the temperature sensor sends a signal command to the control device; after the control device receives the signal command, it controls the cooling water pump to run at an intermediate frequency, Control the first solenoid valve, the second solenoid valve and the fourth solenoid valve to open, control the third solenoid valve to close, control the cooling tower to work and control the variable frequency spray water pump to work at low frequency; At this time, the circulation of cooling water is as follows: under the medium frequency operation of the cooling water pump, the cooling water in the spray water storage tank enters the water-cooling unit for heat exchange, and the cooling water after heat exchange flows through the ejector. The fire-fighting water extracted from the fire-fighting water tank is mixed for cooling; then when the cooling water flows through the top of the cooling tower, it is mixed with the cooling water pumped by the variable frequency spray pump at a low frequency to cool down again; finally, the cooling water enters the cooling tower for cooling, and passes through the cooling tower. The cooling tower water supply pipe flows back to the spray water storage tank, and then goes to step 3; Step B3, if the temperature sensor continuously measures t>t1, it means that the system is in a high-load working state. At this time, the temperature sensor sends a signal command to the control device; after the control device receives the signal command, it controls the high-frequency operation of the cooling water pump to control the operation of the cooling water pump. The first solenoid valve, the second solenoid valve and the fourth solenoid valve are opened, the third solenoid valve is controlled to be closed, and the cooling tower is controlled to work and the variable frequency spray water pump is controlled to work at a high frequency; At this time, the circulation of cooling water is as follows: under the high-frequency operation of the cooling water pump, the cooling water in the spray water storage tank enters the water cooling unit for rapid heat exchange, and the cooling water after heat exchange flows through the ejector. Mix and cool with the fire-fighting water drawn from the fire-fighting water tank; then when the cooling water flows through the top of the cooling tower, it is mixed with the cooling water pumped by the variable frequency spray pump at high frequency to cool down again; finally, the cooling water enters the cooling tower for cooling , and flow back to the spray water storage tank through the cooling tower water supply pipe, and then go to step 3. 7. A cooling tower device control method with water replenishing and anti-scaling functions according to claim 4, characterized in that: the step 3 is specifically: In the event of a fire, the high-frequency operation of the cooling water pump is controlled by the control device, the first solenoid valve, the second solenoid valve and the fourth solenoid valve are controlled to close, the third solenoid valve is controlled to open, and the cooling tower and the variable frequency spray water pump are controlled to stop. The cooling water is quickly pumped to the spray storage tank by the cooling water pump, and the fire water tank is replenished by the overflow drain pipe on the spray storage tank; At the same time, the control device controls the operation of the rainwater delivery pump and controls the opening of the fifth solenoid valve, so as to supply water to the fire water tank through the rainwater collection container and the tap water supply pipe.

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