1. A novel anti-freezing cooling tower comprises a cooling tower, wherein a water tank storing liquid water is arranged in the cooling tower, the cooling tower further comprises an air deflector positioned above the water tank, and the novel anti-freezing cooling tower is characterized by further comprising a water supplementing pipeline, a plurality of water return pipelines and a production water tank positioned below the cooling tower, a water supplementing opening is formed in one side of the water tank, one end of the water supplementing pipeline is communicated with the production water tank, the other end of the water supplementing pipeline is connected with a water pump providing hydrodynamic force, the water pump is connected with the water supplementing opening through a first pipeline and is communicated with the water tank, two ends of the plurality of water return pipelines are respectively communicated with the water tank and the production water tank, and water inlets of different water return pipelines are positioned at different positions in the water tank; the air guide plate is characterized by further comprising a spray head, the spray pipeline is located above the air guide plate, the water pump is connected with the spray head through the spray pipeline, and the spray pipeline is provided with a third valve.

2. The novel antifreeze cooling tower of claim 1, wherein the number of the water return pipes is at least two, and the water inlet of the water return pipe is lower as the distance from the water replenishing port is longer.

3. The novel anti-freezing cooling tower as claimed in claim 1, wherein the number of the water return pipes is two, and the two water return pipes are a first water return pipe and a second water return pipe, the first water return pipe is located on one side of the water tank close to the water replenishing opening, the second water return pipe is located on one side of the water tank far away from the water replenishing opening, and the water inlet of the second water return pipe is lower than the water inlet of the first water return pipe.

4. The novel anti-freezing cooling tower as claimed in claim 2 or 3, further comprising a main water return pipe, wherein one end of the main water return pipe is connected with a plurality of the water return pipes respectively, and the other end of the main water return pipe is connected with a production water tank.

5. The novel anti-freezing cooling tower as claimed in claim 1 or 4, further comprising a second pipeline, wherein the second pipeline is respectively communicated with the water pump and a water return pipeline closest to the water replenishing port, a first valve is arranged between the water pump and the first pipeline, and a second valve is arranged between the water pump and the second pipeline.

6. The novel anti-freezing cooling tower as claimed in claim 1, further comprising a return pipe, wherein two ends of the return pipe are respectively communicated with the first pipeline and the water replenishing pipeline, and the return pipe is provided with a return valve.

7. The novel antifreeze cooling tower of claim 1, wherein the water inlet of the water return pipe is positioned behind the inside of the water tank, and the water inlet and the spray pipe are staggered.

8. The novel anti-freezing cooling tower as claimed in claim 1, wherein a plurality of nozzles are arranged at equal intervals in the extension direction of the spray head, the spray head is in a strip shape and is longer than the air deflector, the novel anti-freezing cooling tower further comprises a guide plate positioned between the spray head and the air deflector, the guide plate is in a planar shape, and the guide plate forms an angle of 45-60 degrees with the horizontal direction.

9. The deicing method for the novel anti-freezing cooling tower according to any one of claims 1 to 8, wherein the temperature setting of the cooling water tower is 9 to 12 degrees, and the temperature of the water tank is 8 to 10 degrees;

when the outdoor minimum temperature is lower than-25 ℃, the high-draught fan and the low-draught fan are reversely deiced once every 24 hours, the frequency of the high-draught fan for reversely deicing is 18-22HZ at a high speed, the frequency of the low-draught fan for reversely deicing is 18-22HZ at a high speed, and the reverse deicing time is 15-25 minutes;

when the lowest outdoor temperature is more than or equal to minus 25 ℃, the reverse deicing is carried out once every 12 hours, the fan frequency of the high fan for reverse deicing is 18-22HZ, the fan frequency of the low fan for reverse deicing is 18-22HZ, and the reverse deicing time is 15-25 minutes.

10. The deicing method for the novel anti-freezing cooling tower according to claim 9, wherein the temperature setting of the cooling water under the tower is 10 to 11 degrees, the temperature setting of the water tank is 8.5 to 9 degrees;

when the outdoor minimum temperature is lower than-25 ℃, the high-draught fan and the low-draught fan are reversely rotated to deice once every 24 hours, the frequency of the high-draught fan for reversely deicing is high-speed 20HZ, the frequency of the low-draught fan for reversely deicing is high-speed 20HZ, and the reverse deicing time is 20 minutes;

when the lowest outdoor temperature is more than or equal to minus 25 ℃, the reverse deicing is carried out once every 12 hours, the fan frequency of the reverse deicing of the high fan is 20HZ at high speed, the fan frequency of the reverse deicing of the low fan is 20HZ at high speed, and the reverse deicing time is 20 minutes.

Background

The cooling tower is a device which uses water as circulating coolant, absorbs heat from a system and discharges the heat to the atmosphere so as to reduce the water temperature; the cold is an evaporation heat dissipation device which utilizes the principle that the heat is carried away by the volatilization of steam to achieve evaporation heat dissipation, convection heat transfer, radiation heat transfer and the like to dissipate the waste heat generated in industry or refrigeration air conditioners to reduce the water temperature so as to ensure the normal operation of the system.

According to different process characteristics, the cooling tower runs all day in winter, runs in some time periods, is almost not used in some time periods, but needs to consider the anti-freezing problem. At present, the operation anti-freezing problem of the cooling tower is increasingly prominent, especially in the northern area. In northern areas, the temperature is usually below zero in winter, if the problem is not solved well, the freezing phenomenon can be generated, the freezing has a destructive effect on the structure of the tower, and other parts of the heat exchange tube or the cooling tower can be frozen, so that the problem of freezing prevention in cold areas is extremely important to solve.

Disclosure of Invention

The invention aims to provide a novel anti-freezing cooling tower and a deicing method thereof aiming at the defects of the prior art, which can keep the water in the water tank of the cooling tower in a constantly flowing state, effectively avoid the water in the cooling tower from being frozen, spray the air deflector by using the water, realize the deicing of the frozen air deflector, have good anti-freezing effect and are particularly suitable for severe cold areas.

In order to solve the problems, the invention adopts the following technical scheme:

a novel anti-freezing cooling tower comprises a cooling tower, wherein a water tank storing liquid water is arranged in the cooling tower, the cooling tower further comprises an air deflector positioned above the water tank, a water supplementing pipeline, a plurality of water return pipelines and a production water tank positioned below the cooling tower, a water supplementing opening is arranged on one side of the water tank, one end of the water supplementing pipeline is communicated with the production water tank, the other end of the water supplementing pipeline is connected with a water pump providing hydrodynamic force, the water pump is connected with the water supplementing opening through a first pipeline and is communicated with the water tank, two ends of the plurality of water return pipelines are respectively communicated with the water tank and the production water tank, and water inlets of different water return pipelines are positioned at different positions in the water tank; the air guide plate is characterized by further comprising a spray head, the spray pipeline is located above the air guide plate, the water pump is connected with the spray head through the spray pipeline, and the spray pipeline is provided with a third valve.

On one hand, the production water tank is positioned below the water tank, and the water in the cooling tower is in a continuous circulating state by well utilizing the gravitational potential energy and the power provided by the water pump, so that the anti-freezing effect is achieved. The concrete expression is in the basin that gets into the cooling tower is continuously taken out from among the production pond to the energy that the water in the production pond provided through the water pump, for the cooling tower carries out the moisturizing, and the water in the basin can fall back the production pond again through gravity to guarantee that cold water machine cooling water is in the circulation state, greatly reduced low temperature freezes the possibility.

On the other hand, the invention well utilizes the temperature difference between the water and the air deflector to spray and melt the ice, because the air deflector is positioned above the water tank, the energy provided by the water pump is continuously pumped out of the production water tank through the energy provided by the water pump through the gravitational potential energy and the power provided by the water pump to spray the air deflector through the spray head, the heat exchange is carried out through the temperature difference between the water and the air deflector, the ice melting effect is good, the icing of the air deflector can be effectively prevented, the filler positioned behind the air deflector can normally work, and then the cooled water can fall back into the water tank of the cooling tower through the gravity to cool the water in the water tank. The anti-freezing device can save electric energy while playing a role in preventing freezing, and is efficient and energy-saving.

On the basis of the technical scheme, the invention can be further improved as follows:

furthermore, the number of the water return pipelines is at least two, and the water inlet of the water return pipeline which is farther away from the water replenishing port is lower. The water inlets of different water return pipes are positioned at different positions in the water tank, so that water at multiple positions of the water tank can be ensured to enter circulation, and local freezing is prevented. Meanwhile, because the water pressures at different heights in the water tank are different, the water in the water tank can flow in the water tank by arranging the water return pipes with different water inlet heights, so that the liquidity of the liquid is increased, and the freezing possibility is further reduced.

Because the water mobility apart from the moisturizing mouth position is good, for the high water pressure difference that brings of fine utilization for the inside water of basin is better at the inside mobility of basin, wherein, the farther water inlet of return water pipe is lower apart from the moisturizing mouth, utilizes the principle that water pressure is high to guarantee that the water of here also can fall back the production pond well, also can guarantee simultaneously that the inside water of basin brings because water pressure is different and gets the ability of flowing.

Furthermore, the number of the water return pipelines is two, the water return pipelines are respectively a first water return pipeline and a second water return pipeline, the first water return pipeline is located on one side, close to the water replenishing port, in the water tank, the second water return pipeline is located on one side, far away from the water replenishing port, in the water tank, and a water inlet of the second water return pipeline is lower than a water inlet of the first water return pipeline. The invention has the advantages of simpler integral structure, practicability, high efficiency and low manufacturing cost.

Furthermore, the water recycling device further comprises a total water recycling pipeline, one end of the middle water recycling pipeline is connected with the water recycling pipelines respectively, and the other end of the middle water recycling pipeline is connected with the production water tank. The invention has the advantages of simpler integral structure, practicability, high efficiency and low manufacturing cost.

The water pump is communicated with a water return pipeline which is closest to the water replenishing port, a first valve is arranged between the water pump and the first pipeline, and a second valve is arranged between the water pump and the second pipeline. Because a water pump need provide the water source for a plurality of cooling towers, when one of them cooling tower need overhaul, need guarantee inside anhydrous state, in order to guarantee the normal operating of other cooling towers, through closing first valve, open the second valve during the maintenance, let inside water does not get into the cooling tower basin, directly get back to inside the production pond through the return water pipeline. And normal operation of other cooling towers during maintenance is realized.

Furthermore, the water supply device also comprises a return pipe, wherein two ends of the return pipe are respectively communicated with the first pipeline and the water replenishing pipeline, and the return pipe is provided with a return valve. When the water pump breaks down, through opening the backward flow valve, can let water discharge smoothly through the back flow, get back to the production pond, avoid freezing.

Furthermore, the water inlet of return water pipe is located the inside rear of basin, the water inlet with the spray piping staggers each other. The water inlet is prevented from directly contacting with the spray water to freeze.

Furthermore, a plurality of nozzles are arranged in the extension direction of the spray head at equal intervals, and the spray head is long and longer than the air deflector. The hydroenergy can realize spraying the aviation baffle multiple spot, through evenly distributed, can guarantee that the rivers descend evenly, and the deicing is even, and length is greater than the aviation baffle guarantees that the shower water can cover whole aviation baffle, is favorable to melting ice comprehensively, further increases the aviation baffle and melts the ice effect, effectively prevents that the aviation baffle from freezing.

The air guide plate is positioned between the spray head and the air guide plate, the air guide plate is in a plane shape, and the angle between the air guide plate and the horizontal direction is 45-60 degrees. Through setting up the guide plate for the water that the point sprayed spouts earlier arrives on the guide plate, collect and form a surface of water and then spray the aviation baffle, spray a bit and become the face that is similar to the waterfall and spray, make aviation baffle everywhere cover comprehensively, do not omit, can realize melting ice comprehensively. Through a plurality of tests, the angle between the guide plate and the horizontal direction is set to be 45-60 degrees, so that strong rebound after water drops are avoided, a branch point is well provided, the water sprayed by the point is uniformly hydrated into a surface and flows onto the air deflector, and the ice melting and freezing prevention effects are realized.

Further, still include the outlet, the outlet is connected the drainage pipe and is flowed to municipal sewage. Used for draining water in the water tank during maintenance.

The invention also provides a deicing method of the novel anti-freezing cooling tower, the temperature of the cooling water tower is set to be 9-12 ℃, and the temperature of the water tank is set to be 8-10 ℃;

when the outdoor minimum temperature is lower than-25 ℃, the high-draught fan and the low-draught fan are reversely deiced once every 24 hours, the frequency of the high-draught fan for reversely deicing is 18-22HZ at a high speed, the frequency of the low-draught fan for reversely deicing is 18-22HZ at a high speed, and the reverse deicing time is 15-25 minutes;

when the lowest outdoor temperature is more than or equal to minus 25 ℃, the reverse deicing is carried out once every 12 hours, the fan frequency of the high fan for reverse deicing is 18-22HZ, the fan frequency of the low fan for reverse deicing is 18-22HZ, and the reverse deicing time is 15-25 minutes.

Further, the temperature of the cooling water tower is set to be 10-11 ℃, and the temperature of the water tank is set to be 8.5-9 ℃;

when the outdoor minimum temperature is lower than-25 ℃, the high-draught fan and the low-draught fan are reversely rotated to deice once every 24 hours, the frequency of the high-draught fan for reversely deicing is high-speed 20HZ, the frequency of the low-draught fan for reversely deicing is high-speed 20HZ, and the reverse deicing time is 20 minutes;

when the lowest outdoor temperature is more than or equal to minus 25 ℃, the reverse deicing is carried out once every 12 hours, the fan frequency of the reverse deicing of the high fan is 20HZ at high speed, the fan frequency of the reverse deicing of the low fan is 20HZ at high speed, and the reverse deicing time is 20 minutes.

According to multiple tests, the temperature of the water tank is reduced by 2 degrees when the ice of the air deflector is melted in the early stage of deicing and the temperature of the water tank is reduced to 10 minutes. After deicing for 20 minutes, the water bath temperature will decrease by 1 degree. At this time, the operation can be switched to the forward operation, and the lowest fan frequency and the selected high-speed and low-speed fans in the automatic operation options can be switched.

The method provided by the invention is matched with a spray pipeline for spraying, so that the deicing effect can be enhanced, and good deicing and deicing are ensured.

The invention can also adopt automatic control, and when the automatic control is changed into manual control, the fan frequency in the original automatic operation is kept. The optimal temperature can be automatically set according to the outdoor temperature by setting the temperature of the lower tower of the cooling tower. In automatic operation, cooling towers participating in inversion can be selected, and automatic inversion deicing can be selected. The fan that needs the reversal, the time of reversal, the interval time of reversal each time can be selected in a flexible way. The operation in cold seasons can reach the condition without human intervention.

Compared with the prior art, the invention has the beneficial effects that:

1. the production water tank is positioned below the water tank, and the water in the water tank of the cooling tower is in a continuous circulating state by well utilizing the gravitational potential energy and the power provided by the water pump, so that the anti-freezing effect is achieved. The concrete expression is that in the energy that the water in the production pond provided through the water pump continuously takes out the basin that gets into the cooling tower from among the production pond, for the cooling tower carries out the moisturizing, the water in the basin can fall back the production pond again through gravity to guarantee that the water in water pump moisturizing and the cooling tower basin is in the circulation state, greatly reduced low temperature freezes the possibility.

2. The water supply device is provided with a first water return pipeline and a second water return pipeline, wherein the water inlets of the first water return pipeline close to the water replenishing port are higher than those of the second water return pipeline far away from the water replenishing port. Through being provided with two return water pipes at both ends in the basin, can effectively guarantee that the water of different positions in the basin all can get into the circulation, prevent that the part from freezing. And through setting up the moisturizing mouth of co-altitude not, utilize the height to bring the water pressure difference well for the inside water of basin is better at the inside mobility of basin, prevents effectively that local freezing from, and further greatly reduced freezes the possibility at low temperature.

3. The invention well utilizes the temperature difference between water and the air deflector to spray and melt ice, because the air deflector is positioned above the water tank, the water in the production water tank is continuously pumped out from the production water tank by the energy provided by the water pump through the gravitational potential energy and the power provided by the water pump to spray the air deflector through the spray head, the heat exchange is carried out through the temperature difference between the water and the air deflector, the ice melting effect is good, the icing of the air deflector can be effectively prevented, the filler positioned behind the air deflector can normally work, and then the cooled water can fall back into the water tank of the cooling tower through the gravity to cool the water in the water tank. The anti-freezing device can save electric energy while playing an anti-freezing role, and is energy-saving and efficient.

4. According to the invention, the guide plate is arranged between the spray head and the air guide plate, so that point-spraying water is sprayed on the guide plate firstly, is collected to form a water surface and then is sprayed on the air guide plate, the point-spraying is changed into waterfall-like surface spraying, all parts of the air guide plate are covered completely, no omission exists, and comprehensive deicing can be realized. In addition, the angle between the guide plate and the horizontal direction is set to be 45-60 degrees, so that strong rebound after water drops are avoided, a branch point is well provided, the water sprayed on the point is uniformly hydrated into a surface, and the surface flows onto the air deflector, and the ice melting and freezing prevention effects are realized.

5. The ice melting and freezing prevention device is simple in overall structure, practical and efficient, has excellent ice melting and freezing prevention effects in severe cold areas, is low in manufacturing cost, saves energy and is efficient, manpower and material resources are greatly reduced, and cost is saved.

6. The invention adopts a unique inversion method, obtains the optimal data of inversion deicing through a plurality of tests, and can play an excellent deicing and deicing effect in winter by matching with spraying.

Drawings

FIG. 1 is a schematic structural diagram of a novel antifreeze cooling tower according to an embodiment of the invention;

the system comprises a cooling tower, a water tank, a production water tank, a water replenishing port, a water replenishing pipeline, a water pump, a water returning pipeline, a second water returning pipeline, a first water returning pipeline, a total water returning pipeline, a water inlet, a second pipeline, a 12 return pipe, a first valve, a return valve, a 14 return valve, a second valve, a 16 first pipeline, a spray nozzle, a guide plate, a flow plate and a third valve, wherein the cooling tower is 1-arranged, the water tank is 2-arranged, the production water tank is 3-arranged, the water replenishing port is 4-arranged, the water replenishing pipeline is 5-arranged, the water pump is 6-arranged, the second water returning pipeline is 7-arranged, the first water returning pipeline is 8-arranged, the total water returning pipeline is 9-arranged, the water inlet is 11-arranged, the second pipeline is 12-arranged, the first valve is 13-arranged, the return valve is 14-arranged, the spray pipeline is 18-arranged, the spray nozzle is 19-arranged, the guide plate is 20-arranged in the spray pipeline, and the third valve is arranged in the spray pipeline.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples. Advantages and features of the invention will become apparent from the claims and the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise ratio for the purpose of facilitating and distinctly claiming the embodiments of the invention.

Examples

A novel anti-freezing cooling tower is shown in figure 1 and comprises a cooling tower 1, wherein a water tank 2 for storing liquid water is arranged in the cooling tower 1, the cooling tower 1 further comprises an air deflector 21 positioned above the water tank 2 and a water replenishing pipeline 5, a plurality of water return pipelines and a production water tank 3 positioned below the cooling tower 1, a water replenishing port 4 is arranged on one side of the water tank 2, one end of the water replenishing pipeline 5 is communicated with the production water tank 3, the other end of the water replenishing pipeline is connected with a water pump 6 for providing hydrodynamic force, the water pump 6 is connected with the water replenishing port 4 through a first pipeline 16 and is communicated with the water tank 2, two ends of the plurality of water return pipelines are respectively communicated with the water tank 2 and the production water tank 3, and water inlets 10 of different water return pipelines are positioned at different positions in the water; the air-conditioner also comprises a spray head 18 with a spray pipeline 17 positioned above the air deflector 21, the water pump 6 is connected with the spray head 18 through the spray pipeline 17, and the spray pipeline 17 is provided with a third valve 22.

The number of the water return pipelines is two, the water return pipelines are respectively a first water return pipeline 8 and a second water return pipeline 7, the first water return pipeline is located on one side, close to the water replenishing port 4, in the water tank 2, the second water return pipeline 7 is located on one side, far away from the water replenishing port 4, in the water tank 2, and a water inlet 10 of the second water return pipeline 7 is lower than a water inlet 10 of the first water return pipeline 8.

On the basis of the technical scheme, the invention can be further improved as follows:

in a preferred scheme, still include total return water pipe 9, well return water pipe one end is connected a plurality of respectively return water pipe, the other end is connected production pond 3.

In a preferable scheme, the water replenishing device further comprises a second pipeline 11, the second pipeline 11 is respectively communicated with the water pump 6 and a water return pipeline closest to the water replenishing port 4, a first valve 13 is arranged between the water pump 6 and the first pipeline 16, and a second valve 15 is arranged between the water pump 6 and the second pipeline 11.

In a preferable scheme, the device further comprises a return pipe 12, two ends of the return pipe 12 are respectively communicated with the first pipeline 16 and the water replenishing pipeline 5, and the return pipe 12 is provided with a return valve 14. When the water pump 6 is in failure, the water can be smoothly discharged through the return pipe 12 and returned to the production water tank 3 by opening the return valve 14, so that the water is prevented from freezing.

Wherein, the water inlet 10 of return water pipe is located 2 inside rear of basin, water inlet 10 with spray pipe 17 staggers each other. The water inlet 10 is prevented from directly contacting spray water to freeze.

In a preferable scheme, a plurality of nozzles 19 are arranged at equal intervals in the extension direction of the spray head 18, and the spray head 18 is long and longer than the air deflector 21.

In a preferable scheme, the air deflector 20 is positioned between the spray head 18 and the air deflector 21, the air deflector 20 is in a planar shape, and the angle between the air deflector 20 and the horizontal direction is 45-60 degrees. Through setting up guide plate 20 for the water that the point sprayed spouts earlier on guide plate 20, collect and form a surface of water and then spray aviation baffle 21, spray a bit and become the face like the waterfall and spray, make aviation baffle 21 everywhere cover comprehensively, do not omit, can realize melting ice comprehensively. Through a plurality of tests, the angle between the guide plate 20 and the horizontal direction is set to be 45-60 degrees, so that strong rebound after water drops are avoided, a branch point is well provided, the water sprayed in a point mode is uniformly hydrated to flow onto the air deflector 21, and the ice melting and freezing prevention effects are achieved.

In a preferable scheme, the sewage treatment device further comprises a water outlet which is connected with the water drainage pipeline and flows to municipal sewage. For draining water in the water tank 2 during maintenance.

The invention also provides a deicing method of the novel anti-freezing cooling tower, which comprises the following steps:

the temperature of the cooling water tower is set to be 10-11 ℃, and the temperature of the water tank 2 is set to be 8.5-9 ℃;

when the outdoor minimum temperature is lower than-25 ℃, the high-draught fan and the low-draught fan are reversely rotated to deice once every 24 hours, the frequency of the high-draught fan for reversely deicing is high-speed 20HZ, the frequency of the low-draught fan for reversely deicing is high-speed 20HZ, and the reverse deicing time is 20 minutes;

when the lowest outdoor temperature is more than or equal to minus 25 ℃, the reverse deicing is carried out once every 12 hours, the fan frequency of the reverse deicing of the high fan is 20HZ at high speed, the fan frequency of the reverse deicing of the low fan is 20HZ at high speed, and the reverse deicing time is 20 minutes.

According to multiple tests, the temperature of the water tank 2 is reduced by 2 degrees when the ice of the air deflector is melted in the early stage of deicing when the ice is removed for 10 minutes. After deicing for 20 minutes, the temperature of the water tank 2 is reduced by 1 degree. At this time, the operation can be switched to the forward operation, and the lowest fan frequency and the selected high-speed and low-speed fans in the automatic operation options can be switched.

The application process of the invention is as follows:

on one hand, the production water tank 3 is positioned below the water tank 2, and the water in the cooling tower 1 is in a continuous circulating state by well utilizing the gravitational potential energy and the power provided by the water pump 6, so that the anti-freezing effect is achieved. The concrete expression is in the basin 2 that gets into cooling tower 1 is continuously taken out from among the production pond 3 to the energy that water in the production pond 3 provided through water pump 6, for cooling tower 1 carries out the moisturizing, and the water in the basin 2 can fall back production pond 3 again through gravity to guarantee that cold water machine cooling water is in the circulation state, greatly reduced low temperature freezes the possibility.

On the other hand, the invention well utilizes the temperature difference between the water and the air deflector 21 to spray and melt the ice, because the air deflector 21 is positioned above the water tank 2, the water in the production water tank 3 is continuously pumped out from the production water tank 3 by the energy provided by the water pump 6 through the gravitational potential energy and the power provided by the water pump 6, and is sprayed by the spray head 18 for the air deflector 21 to perform heat exchange through the temperature difference between the water and the air deflector 21, the ice melting effect is good, the air deflector 21 can be effectively prevented from being frozen, the filler positioned behind the air deflector 21 can normally work, and then the cooled water can fall back into the water tank 2 of the cooling tower 1 through gravity to cool the water in the water tank 2. The anti-freezing device can save electric energy while playing a role in preventing freezing, and is efficient and energy-saving.

When one of them cooling tower 1 need overhaul, need guarantee inside anhydrous state, nevertheless because a water pump 6 need provide the water source for a plurality of cooling towers 1, in order to guarantee the normal operating of other cooling towers 1, during the maintenance, through the water in outlet discharge basin 2 to close first valve 13, open second valve 15, let inside water does not get into cooling tower 1 basin 2, directly get back to inside the production pond 3 through the return water pipeline. And normal operation of other cooling towers 1 during maintenance is realized.

The invention makes good use of the gravitational potential energy and the power provided by the water pump 6 to ensure that the water in the cooling tower 1 is in a continuous circulating state, thereby achieving the anti-freezing effect. The invention also makes good use of the water pressure difference caused by different heights, so that the water in the cooling tower 1 has good fluidity in the water tank 2, local freezing is effectively prevented, and the possibility of freezing at low temperature is further greatly reduced. The air guide plate 21 can be sprayed by water, so that the frozen air guide plate 21 is iced, and the anti-freezing effect is good.

The ice melting and freezing prevention device is simple in overall structure, practical and efficient, has excellent ice melting and freezing prevention effects in severe cold areas, is low in manufacturing cost, saves energy, is efficient, greatly reduces manpower and material resources, and saves cost.

It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the invention fall within the scope of the claims of the invention and their equivalents, the invention is intended to include such modifications and variations.