CN115808090A - A peak cooling device for circulating water system of generating set - Google Patents

Abstract

The invention discloses a peak cooling device of a circulating water system of a generator set. Generating set circulating water system peak cooling device includes: the system comprises an evaporative condenser, a water feeder and two spraying mechanisms; a heat exchange assembly is arranged in the evaporative condenser, a water baffle is arranged above the heat exchange assembly, a first refrigerator is arranged at the top of the water baffle, a fan and a water storage tank are arranged below the heat exchange assembly, the water storage tank is connected with the water feeder, and the water baffle is connected with the water storage tank; the spraying mechanism comprises a water inlet pipeline. According to the peak cooling device of the circulating water system of the generator set, provided by the invention, the evaporative condenser, the water feeder and the two spraying mechanisms are arranged, so that water mist is sprayed to the top and the bottom of the heat exchange component in the evaporative condenser at the same time, a layer of water film can be uniformly covered on the surface of the heat exchange component, the evaporated water quantity is increased, and the heat exchange efficiency of the evaporative condenser is further improved.

Description

A peak cooling device for circulating water system of generating set

technical field

The invention relates to the technical field of cooling devices, in particular to a peak cooling device for a circulating water system of a generator set.

Background technique

Most coal-rich and water-shortage areas use air-cooled power stations. The direct air-cooled condenser uses ambient air as the medium. The performance of the unit is greatly affected by the ambient temperature. Since the 1970s, developed countries in the world began to use evaporative condensers instead of water-cooled condensers. Compared with the traditional water-cooled and air-cooled heat-exchange equipment mainly based on sensible heat exchange, the evaporative condenser (the core of the peak cooling device) has greatly improved the heat-exchange efficiency, reduced energy consumption and water consumption, and thus improved the enterprise's profitability. economic and social benefits.

The existing evaporative condenser adopts the top-mounted spraying method during the working process, and the bottom of the cooling coil cannot be completely covered, resulting in a reduction in the amount of water that can be evaporated after the cooling coil, and it is impossible to completely cover the surface of the cooling coil with water The film reduces the heat transfer efficiency, which in turn reduces the heat transfer efficiency of the evaporative condenser.

Therefore, it is necessary to provide a generator set circulating water system peak cooling device to solve the above technical problems.

Contents of the invention

In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a peak cooling device for the circulating water system of the generator set, which can evenly cover the surface of the heat exchange component with a layer of water film, and improve the heat exchange efficiency of the evaporative condenser.

To achieve the above object, the technical scheme adopted in the present invention is as follows:

The peak cooling device of the circulating water system of the generator set includes: an evaporative condenser, a water supply and two spray mechanisms; the evaporative condenser is equipped with a heat exchange component inside, and the two spray mechanisms are symmetrically arranged on the heat exchange component Above and below the heat exchange assembly, a water baffle is provided above the water baffle, and the water baffle is made of PVC material. The top of the water baffle is provided with a first refrigerator, and the first refrigerator is used to cool down the water baffle. A fan and a water storage tank are provided below the heat exchange assembly, the water storage tank is connected to the water supply, the water baffle is installed obliquely, and the bottom edge of the water baffle is provided with a water collection tank, and the water collection tank is connected to the water baffle. The water storage tanks are connected through pipelines; the spray mechanism includes a water inlet pipeline, one side of the water inlet pipe is provided with a plurality of nozzles, and one end of the water inlet pipe is connected with a water supplier.

Preferably, a water pump is provided in the water supply device, the water inlet side of the water pump is connected to the water storage tank, and the water outlet side of the water pump is connected to two heat exchange components.

Preferably, the water outlet of the water pump is provided with a refrigeration pipe, the refrigeration pipe surrounds the water outlet of the water pump, and the two ends of the refrigeration pipe are connected to the second refrigerator installed on the top of the water supplier.

Preferably, the heat exchange assembly includes a heat exchange box, a plurality of heat exchange pipelines are arranged inside the heat exchange box, and a plurality of ventilation holes are arranged on the heat exchange box.

Preferably, an annular air supply loop is provided outside the heat exchange box, and the annular air supply pipeline is connected to the heat exchange box through a plurality of connecting pipes. The middle top of the heat box is provided with an exhaust pipe.

Preferably, a water storage tank is provided on the outside of the vent hole, and the width of the water storage tank is 20-30mm.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The present invention realizes spraying water mist to the top and bottom of the heat exchange assembly inside the evaporative condenser by arranging an evaporative condenser, a water supply device and two spraying mechanisms, so that the surface of the heat exchange assembly can be evenly sprayed. Cover a layer of water film to increase the amount of water that can be evaporated, thereby improving the heat transfer efficiency of the evaporative condenser;

(2) The present invention can carry out secondary cooling to the condensed water by arranging the water pump and the refrigeration pipe, reduce the temperature of the condensed water, improve the cooling effect of the water mist, and also improve the cooling effect of the heat exchange component to a certain extent;

(3) In the present invention, by setting an annular air supply loop for supplying air in multiple directions, the water vapor can be evenly distributed in the heat exchange pipeline inside the heat exchange box, so that the heat exchange box is heated evenly, and the heat exchange efficiency is further improved , by providing a water storage tank, it is possible to store water while increasing the surface area of the heat exchange box, thereby improving the heat exchange effect.

Description of drawings

Fig. 1 is the structural schematic diagram of the peak cooling device of the generating set circulating water system provided by the present invention;

Fig. 2 is the structural representation of evaporative condenser in Fig. 1;

Fig. 3 is a schematic cross-sectional structural view of the peak cooling device of the circulating water system of the generator set shown in Fig. 1;

Fig. 4 is a schematic structural view of the water supply device in Fig. 1;

Fig. 5 is a schematic structural diagram of the heat exchange assembly in Fig. 1;

Fig. 6 is a schematic structural view of the spray mechanism in Fig. 1;

FIG. 7 is an enlarged view of part A in FIG. 5 .

Among them, the names corresponding to the reference signs are: 1-evaporative condenser, 2-water supply, 3-heat exchange assembly, 4-spray mechanism, 5-fan, 6-water baffle, 7-first refrigerator , 8-second refrigerator, 9-water pump, 10-air vent, 11-nozzle, 12-refrigeration pipe, 13-water storage tank, 14-heat exchange box, 15-air supply pipeline, 16-connecting pipe, 17- Water storage tank, 18-water inlet pipeline.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments, and the mode of the present invention includes but not limited to the following embodiments.

Example 1:

As shown in Figures 1-7, the peak cooling device for the circulating water system of the generator set provided by the present invention includes: an evaporative condenser 1, a water supply device 2 and two spray mechanisms 4; There is a heat exchange assembly 3, and two spraying mechanisms 4 are arranged symmetrically above and below the heat exchange assembly 3. Above the heat exchange assembly 3, a water retaining plate 6 is provided, and the water retaining plate 6 is made of PVC material. The top of the water baffle 6 is provided with a first refrigerator 7, and the first refrigerator 7 is used to cool down the water baffle 6. Below the heat exchange assembly 3, a fan 5 and a water storage tank 13 are provided. The water storage tank 13 Connected to the water supplier 2, the slanted installation of the water retaining plate 6, the bottom edge of the water retaining plate 6 is provided with a sump, and the sump is connected to the water storage tank 13 through pipelines; the spray mechanism 4 includes Water inlet pipe 18, one side of the water inlet pipe 18 is provided with a plurality of nozzles 11, one end of the water inlet pipe 18 is connected with the water supply device 2, and when in use, the heat exchange assembly 3 is connected with the steam exhaust pipe of the steam turbine, and the steam turbine discharges The high-temperature gas is passed into the heat exchange assembly 3, the top and bottom spray mechanisms 4 are activated simultaneously, the water supply 2 provides high-pressure cooling water and sprays it through a plurality of nozzles 11, and the nozzles 11 spray water mist and evenly cover the replacement assembly 3, part of the sprayed water mist and condensed water descends and enters the water storage tank 13, and exchanges heat with the water vapor in the heat exchange component 3, thereby cooling and liquefying the water vapor. The water vapor is blown by the wind 5 The water baffle plate 6 that blows up and meets the low temperature cools down and liquefies and flows back into the water storage tank 13. The water supply device 2 extracts the condensed water in the water storage tank 13 to supply water to the nozzle 4 to realize the recycling of cooling water.

By setting the evaporative condenser 1, the water supply device 2 and two spraying mechanisms 4, it is possible to simultaneously spray water mist on the top and bottom of the heat exchange assembly 3 inside the evaporative condenser 1, so that the surface of the heat exchange assembly 3 can be covered. Evenly cover a layer of water film, increase the amount of water that can be evaporated, and then improve the heat exchange efficiency of the evaporative condenser.

Example 2:

As shown in Figure 4, a water pump 9 is provided in the water supply device 2, the water inlet side of the water pump 9 is connected with the water storage tank 13, and the water outlet side of the water pump 9 is connected with two heat exchange components 3, and the water outlet end of the water pump 9 is provided with There is a refrigeration pipe 12, which surrounds the outlet end of the water pump 9, and the two ends of the refrigeration pipe 12 are connected with the second refrigerator 8 installed on the top of the water supply device 2, and the second refrigerator 8 is used to feed the refrigeration pipe. The cooling of the refrigerant inside 12, when in use, the condensed water in the water storage tank 13 is extracted by the water pump, and then the cooling pipe 12 passes through the secondary cooling to reduce the temperature of the cooling water, thereby reducing the temperature of the water mist sprayed by the nozzle 11, Improving the cooling effect of the water mist also improves the cooling effect of the heat exchange component 3 to a certain extent.

By setting the water pump 9 and the refrigeration pipe 12, the condensed water can be cooled twice, the temperature of the condensed water can be reduced, the cooling effect of the water mist can be improved, and the cooling effect of the heat exchange assembly 3 can also be improved to a certain extent.

Example 3:

As shown in Figures 5-7, the heat exchange assembly 3 includes a heat exchange box 14, which is provided with a plurality of heat exchange pipelines inside and meets the middle of the heat exchange box 14, and the heat exchange box 14 14 is provided with a plurality of ventilation holes 10, and the heat exchange box 14 is provided with an annular air supply loop 15, and the annular air supply pipeline 15 is connected to the heat exchange box 14 through a plurality of connecting pipes 16, and the heat exchange box 14 is The bottom of the middle part of the heat box 14 is provided with a water return pipe, which is connected to the sewage tank, and the top of the middle part of the heat exchange box 14 is provided with an exhaust pipe, and the uncondensed water is discharged into the atmosphere through the exhaust pipe and the vacuum tube. The outer side of the hole 10 is provided with a water storage tank 17, the width of the water storage tank 17 is 20-30mm. During use, the water vapor is supplied to the heat exchange box 14 from multiple directions at the same time through the annular air supply pipeline 15, so that the water vapor can be evenly distributed. Distributed in the heat exchange pipeline inside the heat exchange box 14, after the water vapor enters the heat exchange and cools down and is liquefied, the liquefied water enters the sewage pool through the return pipe in the middle, and the unliquefied water vapor enters the vacuum tube through the exhaust pipe and enters In the vacuum device, it is then discharged into the atmosphere. At the same time, the water storage tank 17 can store water on the one hand, and on the other hand increases the surface area of the heat exchange box 14, thereby improving the heat exchange effect.

By setting the annular air supply loop 15 that supplies air in multiple directions, the water vapor can be evenly distributed in the heat exchange pipeline inside the heat exchange box 14, so that the heat exchange box 14 is heated evenly, and the heat exchange efficiency is further improved. The water storage tank 17 is provided to store water while increasing the surface area of the heat exchange box 14, thereby improving the heat exchange effect.

When in use, the heat exchange assembly 3 is connected to the exhaust pipe of the steam turbine, the high-temperature gas discharged from the steam turbine passes into the heat exchange assembly 3, the top and bottom spray mechanisms 4 are activated simultaneously, and the water supplier 2 provides high-pressure cooling water and passes through multiple The nozzle 11 sprays out, and the nozzle 11 sprays out water mist and evenly covers the top and bottom of the replacement assembly 3, and part of the sprayed water mist and condensed water descends and enters the water storage tank 13, and the water vapor in the heat exchange assembly 3 Perform heat exchange, and then make the water vapor cool down and liquefy. The water vapor floats up due to the blowing of the wind 5 and encounters the low-temperature water baffle 6 to cool down and liquefy back into the water storage tank 13. The water supplier 2 extracts the condensed water in the water storage tank 13 Supply water to the nozzle 4 to realize recycling of cooling water;

After the condensed water in the water storage tank 13 is extracted by the water pump, the temperature of the cooling water is lowered through the secondary cooling of the cooling pipe 12, thereby reducing the temperature of the water mist sprayed by the nozzle 11, and improving the cooling effect of the water mist, to a certain extent The cooling effect of the heat exchange component 3 is also improved;

Water vapor is supplied to the heat exchange box 14 from multiple directions simultaneously through the annular air supply pipeline 15, so that the water vapor can be evenly distributed in the heat exchange pipeline inside the heat exchange box 14, and the water vapor enters the heat exchange to cool down and liquefy Finally, the liquefied water enters the sewage tank through the return pipe in the middle, and the unliquefied water vapor enters the vacuum pipe through the exhaust pipe and enters the vacuum device, and then is discharged into the atmosphere. At the same time, the water storage tank 17 can store water Water, on the one hand, increases the surface area of the heat exchange box 14, thereby improving the heat exchange effect.

The above-mentioned embodiment is only one of the preferred implementation modes of the present invention, and should not be used to limit the scope of protection of the present invention, but any modification or embellishment without substantive significance made on the main design concept and spirit of the present invention shall be solved by it. If the technical problems are still consistent with the present invention, all should be included in the protection scope of the present invention.

Claims (6)

1. A generator set circulating water system peak cooling device, characterized in that it comprises: Evaporative condenser, water supply and two spray mechanisms; The evaporative condenser is provided with a heat exchange assembly inside, a water baffle is provided above the heat exchange assembly, a first refrigerator is provided on the top of the water baffle, and a fan is provided below the heat exchange assembly and a water storage tank, the water storage tank is connected to the water supply device, and the water baffle is connected to the water storage tank; The spraying mechanism includes a water inlet pipe, one side of the water inlet pipe is provided with a plurality of spray heads, and one end of the water inlet pipe is connected with a water supplier. 2 . The peak cooling device for the circulating water system of the generating set according to claim 1 , wherein a water pump is arranged in the water supply device. 3 . 3. The peak cooling device for the circulating water system of a generating set according to claim 2, wherein a refrigeration pipe is provided on the outlet end of the water pump, and the two ends of the refrigeration pipe are connected to the water supply device. Second cooler connection on top. 4. A peak cooling device for the circulating water system of a generating set according to claim 1, wherein the heat exchange assembly includes a heat exchange box, and a plurality of heat exchange pipelines are arranged inside the heat exchange box, so that The heat exchange box is provided with a plurality of ventilation holes. 5. The peak cooling device for the circulating water system of a generating set according to claim 4, wherein an annular air supply loop is arranged outside the heat exchange box, and the annular air supply pipeline passes through a plurality of connecting pipes Connect with the heat exchange box. 6 . The peak cooling device for the circulating water system of a generating set according to claim 4 , wherein a water storage tank is arranged outside the vent hole. 7 .

Images