CN206556459U - Efficient open water-saving cooling tower - Google Patents

Abstract

An efficient open type water-saving cooling tower belongs to the technical field of industrial cooling towers and aims to solve the problems that the existing water-saving industrial cooling tower is complex in structure and limited in practical application. The cooling tower main body is a cooling tower main body of an open air cooling tower which is formed by connecting an air cooling section consisting of finned tubes, a finned tube air cooler for cooling circulating water in a dry cooling section through conduction heat dissipation, a dry cooling section in which the circulating water firstly passes through the dry cooling section and then enters a wet cooling section, the dry cooling section is arranged above the wet cooling section, tower inlet air is connected in parallel, and the circulating water is connected in series, and the dry cooling section of the open air cooling tower is a heat dissipation unit consisting of finned tubes. Its simple structure is practical, and the operation is simple and easy, and the working costs is low, saves the water resource, and the range of application is wide, and installation convenient to use is applicable to newly-built and the transformation of cooling tower, can not only be applied to mechanical convulsions and flows against current and crossing current cooling tower, still can be applied to nature convulsions crossing current and counter current cooling tower etc..

Description

Efficient open water-saving cooling tower

technical field

The utility model belongs to a water-saving industrial cooling tower in the technical field of industrial cooling towers.

Background technique

In the process of industrial production, a large amount of heat is often generated, which will increase the temperature of production equipment or products, and must be cooled in time to avoid affecting the normal production and product quality; water is widely used as a good medium for absorbing and transferring heat; industry Production requires a lot of water, and basic industries such as oil refining, petrochemical, chemical, coal chemical, electric power, and metallurgy are large water users; reducing water consumption is a problem that industrial enterprises must face; water-saving technology is an urgent need for industrial enterprises ; Up to 80% of industrial water is cooling water, which is used for cooling products, materials or equipment through evaporation and heat dissipation; in the process of recycling, except for a small amount of sewage and leakage, more than 85% of cooling water loss is circulating water Evaporation loss in the wet and cold link (cooling tower) in the system; at the same time, in order to maintain normal process production, a large amount of fresh water needs to be added; therefore, reducing the evaporation loss of water in the circulating water system is a new direction for industrial water recycling and water saving and cutting-edge technology. In the known technology, the existing water-saving cooling towers mainly adopt the following technical solutions:

ⅰ. The main technical feature of a cooling tower professional company in the United States is to install a plastic double-channel air-to-air normal-pressure heat exchange module (also called a condensation module) in the upper air chamber of the cooling tower wet section. The discharged hot and humid air is condensed to achieve the purpose of eliminating fog and saving water. However, there are two main shortcomings of this technology. The large-area and large-volume condensing module installed in the air chamber of the cooling tower cannot work in summer but is inconvenient to remove, resulting in an increase in the overall wind resistance of the cooling tower and a large increase in fan energy consumption.

ⅱ. The main feature of the dry-wet cooling tower is to add a dry section of finned tubes in the cooling tower to cool the circulating water and heat the air flowing through it, and mix it with the hot and humid air flowing out of the wet section of the cooling tower to reduce the humidity of the air leaving the tower. To achieve the purpose of fog elimination, although it can save water to a certain extent, it is a subsidiary effect. This technology aims to eliminate fog. The water saving rate is low due to reasons such as the layout location.

ⅲ. Closed air-cooled cooling tower, the main feature is that desalinated water is used as cooling water, which is recycled in the closed tower without contact with the outside air, and heat is absorbed from the process heat exchanger, relying on the water film evaporation in the closed tower The air cooler cools down, and the heat is absorbed and taken away by the air outside the air cooler tube and the spray water. The biggest advantage of this technology is less evaporating water, high water saving efficiency, and the annual water saving rate can reach more than 50%, but there are disadvantages such as high energy consumption, large investment, unstable temperature drop effect, large number of equipment, complicated management and maintenance, etc. At the same time, there are high risks in operation management, such as the risk of material leakage in the closed system, difficult replacement of desalinated water pollution, long parking time for disposal, and the quality control of the external spray water has a great impact on the evaporative cooling effect of the light tube. risk etc.

There are other technical schemes, such as water vapor droplets at the outlet of the cooling tower based on high-voltage electrostatic adsorption, dry ice or liquid nitrogen condensing the hot and humid air of the cooling tower through the flute releaser, using heat pipe technology to cool the hot and humid air at the outlet of the cooling tower, etc., but Practical applications are limited.

To sum up, the existing industrial cooling tower is limited by its structure, its structure is complicated, and its practical application is limited. With the increasing development and technological progress of industrial cooling towers, although the existing open cooling towers are used in the industrial field It is very extensive, its operation is stable, and the operation is simple. While the open cooling tower applies the anti-fog technology, although it can save a small amount of circulating water consumption, that is, the water saving rate is low, which needs to be further improved; although the closed cooling tower can achieve high Water-saving rate, but it is difficult to control in actual operation, and it is easy to have adverse effects on equipment.

Utility model content

In order to overcome the deficiencies of the prior art, the existing water-saving industrial cooling towers have complex structures and limited practical applications. The purpose of this utility model is to provide a new type of water-saving industrial cooling tower with simple and practical structure, easy operation and operation, saving water resources, wide application range and convenient installation and use.

The technical solution adopted by the utility model to solve the above problems is:

A high-efficiency open-type water-saving cooling tower. The main body of the cooling tower is a finned tube air cooler that is equipped with finned tubes to form an air-cooling section, and the circulating water is cooled by conduction heat dissipation in the dry-cooling section. The dry cooling section that enters the wet cooling section is installed above the wet cooling section, and the air entering the tower is connected in parallel and the circulating water is connected in series. The main body of the cooling tower is an open air cooling cooling tower. A cooling unit composed of tubes.

In the above-mentioned high-efficiency open-type water-saving cooling tower, the dry air-cooling section finned tube group of the open-type air-cooled cooling tower is arranged on each facade of the main body of the cooling tower, and it is arranged separately, combined and arranged on the main body of the cooling tower. Any one of the upper and lower parts of the top platform.

In the above-mentioned high-efficiency open water-saving cooling tower, the high-efficiency open water-saving cooling tower is provided with adjustable louvers in the dry section, adjustable louvers in the wet section, horizontally adjustable louvers and non-adjustable louvers in the dry cooling section and wet cooling section.

In the above-mentioned high-efficiency open water-saving cooling tower, the circulating water return pipe network before the open air-cooled cooling tower is arranged in a ring shape, and the primary water distribution system 4 and the secondary water distribution system connected by the circulating water return pipe network are composed of vertical The water eliminator is connected to the sump to meet the water pressure and flow balance entering the dry cooling section of the cooling tower.

In the above-mentioned high-efficiency open-type water-saving cooling tower, the louvers installed on the main body of the cooling tower are any one of manual louvers and electric louvers.

In the above-mentioned high-efficiency open-type water-saving cooling tower, the main body of the cooling tower is a structure in which the air entering the tower is connected in parallel and the circulating water is connected in series.

Since this technical scheme designs a high-efficiency open-type water-saving cooling tower, it has the ability to change the original open-type cooling tower from the evaporative heat dissipation method to the combination of evaporative heat dissipation and conduction heat dissipation, and control the evaporative heat dissipation and conduction heat dissipation of heat transfer. The way of heat dissipation ratio can achieve the purpose of high water saving and fog elimination.

The working principle of this technical solution is that the hot water coming from the heat exchanger of the device first enters the finned tube group of the high-efficiency open water-saving cooling tower, and at the same time the fan system on the top of the cooling tower rotates to draw air, so that a negative pressure is formed in the cooling tower, The dry and cold air outside the tower continuously enters the tower, and the dry and cold air takes part of the heat of the hot water from the surface of the finned tube through heat conduction, realizing the physical process of heat transfer, and entering the air chamber to form dry and hot air. The hot water that flows out of the finned tubes and is cooled to a certain extent enters the water distribution system of the cooling tower, passes through the water distribution system (water distribution pipes, nozzles), and is sprayed into the filler system with a large specific surface area to form a water film, hot water and The dry and cold air flows reversely or laterally on the surface of the filler, and the air takes away the water molecules from the surface of the water film to generate evaporation and heat dissipation, realizing the physical process of mass transfer and heat transfer; the increase of air enthalpy and humidity becomes hot and humid air, which enters the air chamber. The hot and humid air and the hot and dry air flowing through the finned tubes are mixed in the air chamber and discharged into the atmosphere through the fan duct. At the same time, the enthalpy and temperature of the water decrease, and it falls into the pool under the tower, and is pumped to the process heat exchange equipment for recirculation. It is based on an ordinary open cooling tower, and is equipped with a large-area arrangement of finned tube air coolers to realize the cooling process of circulating water combined with conduction heat dissipation and evaporative heat dissipation: finned tube air coolers (called dry cooling section) Reduce the temperature of all circulating water to a certain temperature, and the circulating water enters the wet cooling section of the cooling tower, and the wet cooling section will not meet the process requirements. The temperature of the circulating water is further reduced; through the adjustment of the position and size ratio of the air cooling section and the wet cooling section, the circulating water cooling requirement is met. At the same time, because the dry cooling section is mainly based on conduction heat dissipation, no water vapor is generated, the heat load borne by the wet cooling section becomes smaller, and the water lost by evaporation in the wet cooling section is relatively small, which reduces the overall evaporation loss of the whole tower, that is, it can save water. The cooling capacity of the dry cooling section is greatly improved, which can realize a high degree of water saving in the circulating water station; and the dry hot air generated by the dry section is mixed with the humid hot air generated by the wet section, which reduces the moisture content of the air in the air chamber and makes the exhaust cooling The air outside the tower is in an unsaturated state to achieve the purpose of eliminating visible fog. Therefore, the utility model can realize high water saving and smog elimination. Before the circulating hot water enters the finned tube group, the pipeline needs to be arranged in a ring shape, in order to balance the water pressure and flow rate of each channel into the finned tube group, and ensure the performance of the open air-cooled cooling tower.

Because the design of the utility model adopts the above-mentioned technical scheme, it effectively solves the problems that the existing water-saving industrial cooling tower has a complex structure and limited practical application. After several tests, the results show that it has the advantages of simple and practical structure, easy operation, low operating cost, water saving, wide application range, convenient installation and use, etc. It is suitable for new construction and renovation of cooling towers, not only for mechanical Draft counterflow and crossflow cooling towers may also be applied to natural draft crossflow and counterflow cooling towers.

Description of drawings

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Fig. 1 is the structural diagram of the utility model embodiment.

Fig. 2 is based on the embodiment in Fig. 1, in order to meet the limitation of the circulating hot water pressure of the system, the arrangement position of the finned tube air cooler 5 is lowered, and the vertical water eliminator 16 is configured at the same time, in order to increase the air cooling through the finned tube The dry hot air 7 of the device 5 enters the area of the air chamber 13 to reduce the resistance, and the other side prevents the water splashing below the horizontal water eliminator 9 in the cooling tower.

Fig. 3 is that on the open cross-flow cooling tower of Fig. 1 embodiment, primary water distribution system 4, fin tube air cooler 5, dry section adjustable louvers 6, wet cooling section adjustable louvers 14, horizontally adjustable louvers 17 are added, cooling The dry and cold air 12 outside the tower passes through the finned tube air cooler 5 to form dry hot air 7 and enters the air chamber 13. At the same time, the circulating hot water enters the finned tube air cooler 5 through the primary water distribution system 4 and is then heated by the dry and cold air 12. Conduction heat transfer, then enter the secondary water distribution system 10, and the circulating water from the primary water distribution system 4 into the secondary water distribution system 10 is a schematic structural diagram of closed operation.

Fig. 4 is on the basis of the embodiment in Fig. 3, the positions of the adjustable louvers 6 in the dry section and the adjustable louvers 14 in the wet-cooling section are configured with non-adjustable louvers 19, which are used for air introduction into the cross-flow packing 18, and the adjustable louvers 6 in the dry section and the adjustable louvers 14 in the wet-cooling section are arranged. The arrangement of segment adjustable louvers 14 is a schematic structural diagram of the staggered arrangement connecting the side of the air chamber 13 and the sump 15 respectively in the finned tube group.

Fig. 5 is based on the embodiment in Fig. 1, the finned tube air cooler 5 and the dry section adjustable louver 6 of the cooling tower main body 20 are also arranged at the platform of the cooling tower main body, the upper part, the lower part and the vertical fins Schematic diagram of the combined arrangement of the tube air cooler 5 and the adjustable louver 6 of the dry section or the arrangement alone.

Each label in the accompanying drawings is: 1-hot and humid unsaturated air; 2-air duct; 3-fan; 4-primary water distribution system; 5-finned tube air cooler; ;8-hot and humid saturated air; 9-horizontal water eliminator; 10-secondary water distribution system; 11-counterflow packing; 12-dry and cold air; 13-air chamber; - vertical eliminator; 17 - horizontally adjustable louvers; 18 - cross flow fill; 19 - non-adjustable louvers; 20 cooling tower main body.

detailed description

In the embodiment shown in Figure 1, the utility model includes a finned tube air cooler 5 in which the main body of the cooling tower is composed of an air cooling section equipped with finned tubes, and the circulating water is cooled by conduction and heat dissipation in the dry cooling section, and the circulating water first passes through the dry cooling section The dry-cooling section that enters the wet-cooling section is installed above the wet-cooling section, the open-type air-cooled cooling tower, the cooling tower main body 2 that enters the tower in parallel and the circulating water is connected in series; the dry-cooling section of the open-type air-cooled cooling tower uses fin A heat dissipation unit composed of finned tubes; the dry air-cooled section finned tube group of the open air-cooled cooling tower is arranged on each facade of the cooling tower main body 20 and combined on the upper part of the top platform of the cooling tower main body; the high-efficiency open-type The water-saving cooling tower is equipped with adjustable louvers 6 in the dry section, adjustable louvers 14 in the wet-cooling section, 17 horizontally adjustable louvers and non-adjustable louvers 19 in the dry cooling section and wet cooling section; The water pipe network is arranged in a ring shape, and the primary water distribution system 4 and the secondary water distribution system 10 connected to the circulating water return pipe network are connected to the sump 15 by the vertical water collector 16; the shutters installed on the main body of the cooling tower 20 are electric Shutters; the main body 20 of the cooling tower is a structure in which the air entering the tower is connected in parallel and the circulating water is connected in series. It is equipped with a primary water distribution system 4, finned tube air cooler 5, adjustable louvers 6 in the dry section, adjustable louvers 14 in the wet and cold section, and dry and cold air 12 outside the cooling tower. The finned tube air cooler 5 forms hot and dry air 7 and enters the air chamber 13; at the same time, the circulating hot water enters the finned tube air cooler 5 through the primary water distribution system 4 and conducts heat transfer with the dry and cold air 12, reducing the temperature. Then enter the secondary water distribution system 10, the circulating water from the primary water distribution system 4 into the secondary water distribution system 10 is closed operation; the circulating water passing through the secondary water distribution system 10 is evenly distributed on the countercurrent packing 11; dry and cold air 12 enters the countercurrent packing 11 Afterwards, the heat transfer mode based on evaporation and heat dissipation with circulating water will produce evaporation of water, loss of circulating water, further cooling of circulating water, and then enter the sump 15; after the dry and cold air 12 enters the counterflow packing 11, the temperature and humidity will increase, and Entrained many small water droplets, after passing through the horizontal water eliminator 9, the small water droplets are intercepted to form hot and humid saturated air 8, and then enter the air chamber 13, where the hot and humid saturated air 8 and the hot and dry air 7 are mixed, The hot and humid unsaturated air 1 is formed and discharged out of the cooling tower; the dry and cold air 12 can enter the cooling tower because of the effect of the exhaust system. The air duct 2 and the fan 3 are the equipment components that allow the dry and cold air 12 to enter; the external dry and cold air 12 is in the cooling tower. The temperature is different in different seasons. In order to reasonably configure the air volume entering the finned tube air cooler 5 and the counterflow packing 11, the adjustable louvers 6 in the dry section and the adjustable louvers 14 in the wet and cold section are respectively set. By adjusting the adjustable louvers 6 in the dry section The angle of the shutter 14 can be adjusted with the wet and cold section to realize the regulation and control of the air volume.

Referring to accompanying drawing 2, this embodiment is based on the embodiment of Fig. 1, in order to meet the limitation of the circulating hot water pressure of the system, the arrangement position of the finned tube air cooler 5 is lowered, and the vertical water eliminator 16 is configured at the same time, in order to increase The area where the hot and dry air 7 passing through the finned tube air cooler 5 enters the air chamber 13 reduces the resistance, and on the other hand prevents the specific structure of water splashing below the horizontal water eliminator 9 in the cooling tower.

With reference to the accompanying drawing 3 embodiment, it is that on the basis of the embodiment of Fig. 1, a water distribution system 4, a finned tube air cooler 5, an adjustable louver 6 in the dry section, and an adjustable louver 14 in the wet cooling section are installed on the open cross-flow cooling tower , Horizontally adjustable louvers 17, the air outside the cooling tower is dry and cold 12, through the fin tube air cooler 5, forming dry hot air 7, entering the air chamber 13, and circulating hot water enters the fin tube air cooling through the primary water distribution system 4 at the same time After the device 5 conducts heat transfer with the dry cold air 12, then enters the secondary water distribution system 10, and the circulating water from the primary water distribution system 4 into the secondary water distribution system 10 is a specific structure of closed operation.

With reference to accompanying drawing 4, present embodiment is on the basis of Fig. 3 embodiment, and the position of dry section adjustable louver 6 and wet-cooling section adjustable louver 14 is configured with non-adjustable louver 19, is used for air importing cross-flow filler 18, and dry section The arrangement of the adjustable louvers 6 and the adjustable louvers 14 in the wet-cooling section connects the side of the air chamber 13 and the sump 15 on the fin tube group respectively, and is a specific structure of staggered arrangement.

Referring to accompanying drawing 5, present embodiment is on the basis of embodiment in Fig. 1, and the finned tube air cooler 5 of cooling tower main body 20 and dry section adjustable louver 6 are also arranged at the platform place, upper part, lower part and A specific structure arranged in combination with the vertical finned tube air cooler 5 and the adjustable louvers 6 in the dry section.

The utility model is not only applicable to the open cooling tower of the mechanical ventilation type described in the above figure, but also suitable for the old and new open cooling towers of the natural ventilation type. There is a difference in the ventilation flow field, which will cause the increase or decrease of some devices. Based on the disclosed technical solutions, it is not limited to the applications listed in the instructions and implementation methods. Although it can be applied to various In the field of utility models, for those skilled in the art, the technical solutions of modification and adding components without departing from the general concept defined by the claims and the equivalent scope are all within the protection scope of this patent.

Claims (6)

1. a kind of efficient open type water-saving cooling tower, it includes cooling tower main body, it is characterised in that the cooling tower main body be by Equipped with finned tube composition air cooling section, recirculated water is in the dry and cold section of finned air cooler cooled down by heat loss through conduction (5) and follows Ring water first passes through dry and cold section of enter back into clammy section dry and cold section and is installed in clammy section of top, enters the parallel connection of tower air and recirculated water series connection Cooling tower main body (20) that institute's group is linked to be, open type air cooling cooling tower, dry and cold section of the open type air cooling cooling tower uses finned tube group Into heat-sink unit.

2. efficient open type water-saving cooling tower according to claim 1, it is characterised in that the open type air cooling cooling tower Dry air cooling section finned tube group is laid in each facade of cooling tower main body (20), and it is individually laid, combination is laid and is laid in cold But tower body top face platform upper, any one of bottom.

3. efficient open type water-saving cooling tower according to claim 1, it is characterised in that the open type water-saving cooling tower Its shutter is that dry section adjustable shutter (6), clammy section of adjustable shutter (14) and level are provided with dry and cold section and clammy section Adjustable shutter (17) and non-adjustable shutter (19).

4. efficient open type water-saving cooling tower according to claim 1, it is characterised in that positioned at open type air cooling cooling tower Recirculated water return pipe net before is that ring-type is set, a water distribution system (4) that its recirculated water return pipe net is connected and secondary Water distribution system (10) connects collecting-tank (15) by upright water collection device (16).

5. efficient open type water-saving cooling tower according to claim 3, it is characterised in that cooling tower main body (20) institute The shutter of installing is any of manual louver window and electric-powered shutter.

6. efficient open type water-saving cooling tower according to claim 1, it is characterised in that the cooling tower main body (20) is Enter the parallel connection of tower air and recirculated water cascaded structure.