Closed cooling tower capable of automatically recovering water vapor

Abstract

The utility model relates to the technical field of cooling equipment, in particular to an automatic vapor recovery closed cooling tower which comprises a tower body, a water collecting tank is arranged at the bottom of the inner side of the tower body, and a main fan is arranged at the top of the tower body; the cooler is positioned above the water collecting tank; the spraying pipe is positioned above the cooler; the low-temperature module is positioned above the spraying pipe, and two sides of the low-temperature module are respectively communicated with a first box body and a second box body which are mounted on the tower body and are used for feeding and discharging a cooling medium; the water collector is positioned above the low-temperature module and below the main fan; the cooler, the spraying pipe, the low-temperature module and the water collector are all arranged in the tower body. According to the low-temperature module, most liquid water can fall into the water collecting tank by means of gravity; a small amount of water ascending due to the suction force of the fan is blocked and recycled under the action of the water collector; the problem that hot steam formed in the heat exchange process of an existing closed cooling tower is completely discharged and cannot be recycled is solved. Cold water or cold air can be adopted as a cooling medium, the cold air is a natural resource and is easy to obtain, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a closed cooling tower with automatic water vapor recovery. Background Art

[0002] When a closed cooling tower (including evaporative air cooler and evaporative condenser) cools down the medium, the spray water will convert a large amount of liquid water into hot steam during the heat exchange process and be taken away by the fan, resulting in continuous consumption of spray water, so the spray water needs to be continuously replenished. The amount of water consumed varies according to the initial temperature of the heat exchange medium and the cooling temperature difference. Generally, a closed cooling tower of about 500 tons consumes about 6 tons of water per hour by evaporation, and the annual water consumption is about 50,000 tons. This large consumption of water resources is a significant problem in the cooling industry, but it cannot be effectively solved. In addition, in order to prevent scaling of heat exchange tubes, many closed cooling towers in the chemical industry use pure water as spray water, and the cost of water consumption increases several times. Therefore, the need to reduce or control this resource consumption is particularly important and urgent in the chemical industry. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and proposes to design a closed cooling tower with automatic water vapor recovery to solve the problem that the hot steam generated in the heat exchange process of the existing closed cooling tower is completely discharged and cannot be recovered, thereby saving a large amount of water resources.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A closed cooling tower with automatic water vapor recovery, comprising:

[0006] A tower body, wherein the bottom of the inner side of the tower body is a water collecting tank, and a main fan is arranged on the top of the tower body;

[0007] a cooler, located above the sump;

[0008] Spray pipe, located above the cooler;

[0009] The low temperature module is located above the spray pipe, and its two sides are respectively connected to a first box and a second box installed on the tower body for the cooling medium to enter and exit;

[0010] The water collector is located above the low-temperature module and below the main fan;

[0011] The cooler, the spray pipe, the low-temperature module and the water collector are all arranged in the tower body.

[0012] In the above technical solution, the hot steam is cooled by the low-temperature module and converted into unsaturated water droplets that fall into the water collection tank below. The water that is sucked upward by the main fan is intercepted by the water collector and falls into the water collection tank. The above double recovery allows most of the hot steam to be converted into liquid water and return to the water collection tank, forming an automatic recovery of water vapor, which greatly saves resources. At the same time, it also avoids the phenomenon of white fog above the cooling tower and plays a role in eliminating fog.

[0013] Furthermore, the cooling medium is water or wind. Wind is a natural resource, easy to obtain, and cost-saving.

[0014] Furthermore, the top of the first box body is open to facilitate air intake, and the side near the bottom is connected to the water supply pipe.

[0015] Furthermore, a water replenishment pump is provided on the water supply pipe, and the water replenishment pump is connected to an external water source for replenishing water to the first box.

[0016] Furthermore, the second box body is provided with a side fan on the top, and the bottom is connected to a water return pipe, and a valve is provided on the water return pipe. When cold air is used as the cooling medium, the side fan is turned on and the valve of the water return pipe under the second box body is closed.

[0017] Furthermore, the spray pipe is connected to the water collecting tank through a connecting pipe, and a spray pump is arranged on the connecting pipe, and the spray pump transports the water in the water collecting tank to the spray pipe.

[0018] Furthermore, the low temperature module includes a plurality of oxali tube bundles and tube sheets welded to the oxali tube bundles, so that the hot steam and the cooling medium in the oxali tube bundles can fully exchange heat.

[0019] Furthermore, the cooler includes a heat exchange tube located in the tower body and a liquid inlet and a liquid outlet arranged at both ends of the heat exchange tube.

[0020] Furthermore, a shutter is provided on the side of the tower body near the lower end.

[0021] Technical effects of the utility model:

[0022] Compared with the prior art, the utility model of a water vapor automatic recovery closed cooling tower has the following advantages:

[0023] 1. A low-temperature module is installed above the cooler. The two sides of the low-temperature module are the first box and the second box for the cooling medium to enter and exit. The low-temperature module can make most of the liquid water fall into the water collection tank by gravity. In addition, a small amount of water that goes up due to the suction of the fan is also blocked and recovered by the water collector;

[0024] 2. The cooling medium can be cold water or cold air, among which cold air is a natural resource and saves costs.

[0025] The utility model realizes the conversion of hot steam into liquid water and the recovery thereof, and prevents the hot steam from being carried away by the fan and wasted, and is a major breakthrough in the resource conservation of closed cooling towers in the chemical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the left view of the utility model water vapor automatic recovery closed cooling tower;

[0027] Figure 2 This is the front view of the utility model water vapor automatic recovery closed cooling tower;

[0028] Figure 3 This is the right view of the utility model water vapor automatic recovery closed cooling tower;

[0029] Figure 4 This is a top view of the utility model's closed cooling tower with automatic water vapor recovery.

[0030] In the figure, 1. tower body; 2. second box body; 3. water collector; 4. low temperature module; 5. spray pipe; 6. return pipe; 7. valve; 8. oxsauer tube bundle; 9. main fan; 10. first box body; 11. water supply pipe; 121. liquid inlet; 122. liquid outlet; 13. spray pump; 14. shutter; 15. water collection tank; 16. make-up pump; 17. connecting pipe; 18. side fan. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is clearly and completely described below in conjunction with the accompanying drawings of the specification.

[0032] Embodiment 1:

[0033] like Figure 1 As shown, the present embodiment involves a closed cooling tower with automatic water vapor recovery, comprising a tower body 1, a second box body 2, a water collector 3, a low-temperature module 4, a spray pipe 5, a return pipe 6, a valve 7, a ox-spur tube bundle 8, a main fan 9, a first box body 10, a water supply pipe 11, a spray pump 13, a shutter 14, a water collection tank 15, a water supply pump 16, a connecting pipe 17 and a side fan 18.

[0034] The bottom of the inner side of the tower body 1 is a water collecting tank 15, and a main fan 9 is arranged on the top of the tower body 1; a cooler, a spray pipe 5, a low-temperature module 4 and a water collector 3 are arranged in sequence from bottom to top inside the tower body 1; a shutter 14 is arranged on the side of the tower body 1 near the lower end.

[0035] The cooler includes a heat exchange tube (not shown) located in the tower body 1 and a liquid inlet 121 and a liquid outlet 122 arranged at both ends of the heat exchange tube. The heat exchange tube can adopt an S-shaped structure, but is not limited to the above structure.

[0036] The spray pipe 5 is connected to the water collecting tank 15 through a connecting pipe 17. A spray pump 13 is arranged on the connecting pipe 17. The spray pump 13 is arranged outside the tower body 1 to transport the water in the water collecting tank 15 to the spray pipe 5.

[0037] The two sides of the low temperature module 4 are respectively connected with the first box 10 and the second box 2 installed on the tower body 1 for the cooling medium to enter and exit. The low temperature module 4 includes a plurality of oxali tube bundles 8 and tube sheets welded with the oxali tube bundles 8. The upper and lower layers of the tube bundles are reversed and longitudinally Z-shaped, so that the hot steam and the cooling medium in the oxali tube bundles 8 can fully exchange heat, and the excess hot steam can be converted into liquid water when passing through the uppermost tube bundle.

[0038] The water collector 3 is located below the main fan 9 and is used to intercept a small amount of water that goes upward due to the suction force of the main fan 9 and drop it into the water collection tank 15.

[0039] The cooling medium is water or wind. To ensure the effect and running cost, the low temperature module 4 can use cold water as the cooling medium in the high temperature stage in summer. The cold water source in summer is recommended to adopt the method of circulating cooling under the ground surface. In the high temperature stage in summer, the ground temperature under the ground surface is in a low temperature state. The cooling is carried out by circulating cooling through the pre-buried coil under the ground surface. The cooled cold water is used as the water source of the low temperature module 4. In spring, autumn and winter, cold air can be used as the cooling medium for cooling. Cold air is a natural resource and is easy to obtain. The hot steam of the closed cooling tower can be cooled by cold air to convert the hot steam into water, which can also save costs.

[0040] The first box 10 has an opening on the top, and preferably, the top is opened as a whole to facilitate air intake, and the side near the bottom is connected to the upper water pipe 11. The upper water pipe 11 is provided with a water supply pump 16, which is connected to an external water source for supplying water to the first box 10.

[0041] The top of the second box 2 is provided with a side fan 18, and multiple side fans 18 can be configured. When the ambient temperature is high, the side fans 18 on the top of the second box 2 are fully loaded. When the external temperature is low, the second box 2 can only open part of the side fans 18 to meet the liquid conversion of hot steam. The bottom of the second box 2 is connected to the return pipe 6, and a valve 7 is provided on the return pipe 6. When cold air is used as the cooling medium, the side fan 18 is turned on and the valve 7 of the return pipe 6 under the second box 2 is closed.

[0042] Working principle: After the spray water of the closed cooling tower described in the utility model passes through the cooler, the heat of the internal medium is absorbed by the heat exchange tube wall, and the water film and air form saturated hot and humid steam, which moves toward the top of the tower and enters the low-temperature module 4 under the action of the wind of the fan. When the hot steam passes through the cow shuttle tube bundle 8 of the low-temperature module 4, its heat is taken away by the cold wind (or cold water) in the cow shuttle tube bundle 8, and the hot steam is converted into unsaturated water droplets and falls into the water collection tank 15. Some water droplets will be taken away by the wind of the fan and pass upward through the water collector 3. The water droplets are intercepted by the water collector 3 and fall into the water collection tank 15 again, avoiding a small amount of water from being lost upward due to the suction of the main fan 9. Finally, most of the hot steam is converted into liquid water and returns to the water collection tank 15, forming an automatic recovery of water vapor. At the same time, it can also avoid the phenomenon of white fog above the cooling tower, which has the effect of eliminating fog.

[0043] The above-mentioned specific implementation methods are only specific cases of the present utility model. The patent protection scope of the present utility model includes but is not limited to the above-mentioned specific implementation methods. Any appropriate changes or modifications made to them by ordinary technicians in the relevant technical field in accordance with the claims of the present utility model shall fall within the patent protection scope of the present utility model.

Claims

1. A closed cooling tower with automatic water vapor recovery, characterized in that: include: A tower body, wherein the bottom of the inner side of the tower body is a water collecting tank, and a main fan is arranged on the top of the tower body; a cooler, located above the sump; Spray pipe, located above the cooler; The low temperature module is located above the spray pipe, and its two sides are respectively connected to a first box and a second box installed on the tower body for the cooling medium to enter and exit; The water collector is located above the low-temperature module and below the main fan; The cooler, the spray pipe, the low-temperature module and the water collector are all arranged in the tower body.

2. The water vapor automatic recovery closed cooling tower according to claim 1 is characterized in that: The cooling medium is water or wind.

3. The water vapor automatic recovery closed cooling tower according to claim 1 is characterized in that: The first box body has an opening at the top and a side surface close to the bottom connected to a water supply pipe.

4. The water vapor automatic recovery closed cooling tower according to claim 3 is characterized in that: A water supply pump is arranged on the water supply pipe.

5. The water vapor automatic recovery closed cooling tower according to claim 1 is characterized in that: The top of the second box is provided with a side fan, and the bottom is connected with a return pipe, and a valve is provided on the return pipe.

6. The water vapor automatic recovery closed cooling tower according to claim 1 is characterized in that: The spray pipe is connected with the water collecting tank through a connecting pipe, and a spray pump is arranged on the connecting pipe.

7. The water vapor automatic recovery closed cooling tower according to claim 1 is characterized in that: The low temperature module comprises a plurality of oxali tube bundles and tube sheets welded to the oxali tube bundles.

8. The water vapor automatic recovery closed cooling tower according to any one of claims 1 to 7, characterized in that: The cooler comprises a heat exchange tube located in the tower body and a liquid inlet and a liquid outlet arranged at both ends of the heat exchange tube.

9. The water vapor automatic recovery closed cooling tower according to any one of claims 1 to 7, characterized in that: Shutters are arranged on the side of the tower body near the lower end.

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