CN220339155U

CN220339155U - Energy-saving device of cooling tower

Info

Publication number: CN220339155U
Application number: CN202321761861.2U
Authority: CN
Inventors: 于茜雯
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2024-01-12
Anticipated expiration: 2033-07-06

Abstract

The utility model discloses an energy-saving device of a cooling tower, which comprises a water collecting module, a flow guiding module and a hydraulic generator, wherein the flow guiding module is connected between the water collecting module and the hydraulic generator, and the hydraulic generator is arranged at the edge of a pool at the bottom of the cooling tower. According to the utility model, the falling noise of a rain area is reduced, and a noise source is pushed to the center of the cooling tower, so that the noise outside the cooling tower is reduced; the ventilation resistance is reduced, the ventilation quantity is increased, the air flow distribution characteristic is improved, the air distribution is more uniform, the cooling performance of the cooling tower is improved, and the cooling effect is better; the flow of the cooling system and the structure of the existing cooling tower are not changed, and potential safety hazards are avoided; the water falls into the water to generate electricity to generate direct economic benefit.

Description

Energy-saving device of cooling tower

Technical Field

The utility model relates to the technical field of energy-saving transformation of cooling towers, and particularly discloses an energy-saving device of a cooling tower.

Background

With the increase of the economic development on the power demand, a large number of thermal power plants are built in China, and the thermal power of China in 2018 accounts for 73.32 percent. Meanwhile, the national importance of environmental protection is increasingly paid, and the environmental assessment of thermal power plants is increasingly strict. The cooling system is an essential component of the thermal power plant, and most of the thermal power plants in China at present adopt a circulating cooling mode with a conventional countercurrent natural ventilation cooling tower to avoid the influence of warm water drainage on the surrounding environment in order to meet the national environmental requirements. Currently, the conventional counter-flow natural draft cooling towers in operation nationally are about 3000.

The thermal power plant utilizes high-temperature and high-pressure steam to push a steam turbine to generate electricity, and the steam discharged by the steam turbine needs to be condensed into liquid water through a condenser. Therefore, the condenser needs a large amount of circulating water for cooling down so as to ensure the normal operation of the whole power generation system.

The bottom of the cooling tower is provided with a large-capacity water tank, and a water pump pumps water from the water tank and sends the water to the condenser to cool the condenser. After heat exchange with steam in the condenser, the temperature of the circulating water rises, and the circulating water is sent to a water distribution pipe network in the tower through a water supply pipeline and a vertical shaft in the tower under the pressure of a water pump. Circulating water is sprayed and falls through the water distribution network, flows through the spraying area, the filling area and the rain area respectively, is fully subjected to heat and mass exchange with ascending air flow in the tower, is reduced in temperature, and finally falls into a water pool at the bottom of the tower again. Thus, the reciprocating circulation realizes the continuous cooling of the condenser.

Conventional counterflow natural draft cooling towers utilize the difference in heat pressure between the inside and outside of the tower to achieve natural draft. Hot air in the tower rises and is discharged from the top of the tower, and fresh cold air is sucked in from the inclined strut at the bottom of the cooling tower to form air flow circulation. And meanwhile, the high-temperature water spray pipe sprays out and falls into a water pool at the bottom of the cooling tower through the spraying area, the filling area and the rain area. The ascending air flow and the descending circulating water perform full heat and mass exchange, so that the circulating cooling of the high-temperature water is realized.

The conventional countercurrent natural draft cooling tower has the following specific disadvantages:

in a conventional natural ventilation countercurrent cooling tower, circulating cooling water is sprayed out from a water spraying framework and falls into a water collecting tank at the bottom of the tower in a water drop state after passing through a packing layer, and because the rain area is large and the water quantity is large, huge noise can be generated, and adverse effects are caused to surrounding residents. The noise at the air inlet of a conventional natural ventilation cooling tower in a 1000 MW-level thermal power generating unit is about 82-86 dB, and is a significant noise source. Many power plants use a huge amount of noise reduction equipment such as a sound insulation barrier to reduce noise.

Therefore, the circulating water of the conventional countercurrent natural ventilation cooling tower falls into a water pool, so that great noise can be generated, and the technical problem to be solved is urgent at present.

Disclosure of Invention

The utility model provides an energy-saving device of a cooling tower, and aims to solve the technical problem that a conventional countercurrent natural ventilation cooling tower can generate great noise.

The utility model relates to an energy-saving device of a cooling tower, which comprises a water collecting module, a flow guiding module and a hydraulic generator, wherein the flow guiding module is connected between the water collecting module and the hydraulic generator, and the hydraulic generator is arranged at the edge of a pool at the bottom of the cooling tower.

Further, the water collecting module comprises a water collecting plate and a water collecting ditch connected with the lower end of the water collecting plate.

Further, the cross section of the water collecting ditch is U-shaped.

Further, the flow guiding module comprises a water collecting tank, and the water collecting tank is arranged below the water collecting tank.

Further, the diversion module comprises a water collecting pipeline which is connected between the water collecting tank and the hydraulic generator.

Further, the water collecting pipeline comprises a descending pipe and a water collecting pipe communicated with the descending pipe.

Further, the flow guiding module is provided with an overflow pipe, the water inlet of the overflow pipe is higher than the water inlet of the descending pipe, and the overflow pipe is communicated with the water collecting pipe.

Further, the hydraulic generator is arranged on the hydraulic turbine base.

Further, a plurality of hydro-generators are disposed around the cooling tower.

Further, a plurality of water collecting modules are arranged in a horizontal direction in a part or the whole area below the cooling tower packing layer.

The beneficial effects obtained by the utility model are as follows:

the utility model provides an energy-saving device of a cooling tower, which adopts a water collecting module, a flow guiding module and a hydraulic generator, wherein the flow guiding module is connected between the water collecting module and the hydraulic generator, and the hydraulic generator is arranged at the edge of a pool at the bottom of the cooling tower. According to the cooling tower energy-saving device, the rain fall noise is reduced, and the noise source is pushed to the center of the cooling tower, so that the noise outside the cooling tower is reduced; the ventilation resistance is reduced, the ventilation quantity is increased, the air flow distribution characteristic is improved, the air distribution is more uniform, the cooling performance of the cooling tower is improved, and the cooling effect is better; the flow of the cooling system and the structure of the existing cooling tower are not changed, and potential safety hazards are avoided; the water falls into the water to generate electricity to generate direct economic benefit.

Drawings

FIG. 1 is a schematic diagram of an embodiment of an energy-saving device for a cooling tower according to the present utility model;

fig. 2 is an enlarged partial schematic view of the portion a shown in fig. 1.

Reference numerals illustrate:

10. a water collection module; 20. a flow guiding module; 30. a hydro-generator; 11. a water collection sheet; 12. a water collecting ditch; 21. a water collection tank; 22. a water collecting pipe; 221. a down pipe; 222. a water collecting pipe; 31. a water turbine base; 100. a cooling tower; 110. a filler layer; 120. and (5) a pool.

Detailed Description

In order to better understand the above technical solutions, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1, a first embodiment of the present utility model provides an energy-saving device for a cooling tower, which comprises a water collecting module 10, a flow guiding module 20 and a hydraulic generator 30, wherein the flow guiding module 20 is connected between the water collecting module 10 and the hydraulic generator 30, and the hydraulic generator 30 is arranged at the edge of a pool 120 at the bottom of the cooling tower 100. The water collecting module 10 may be a water collecting plate or a water collecting film. The water collecting plates can be arranged in parallel or obliquely. The flow guiding module 20 may be a flow guiding plate or a flow guiding tube, which are all within the protection of this patent.

Preferably, referring to fig. 1 and 2, in the cooling tower energy saving device provided in the present embodiment, the water collecting module 10 includes a water collecting plate 11 and a water collecting channel 12 connected to a lower end of the water collecting plate 11. The cross section of the water collecting channel 12 is U-shaped. The diversion module 20 comprises a water collection tank 21, and the water collection tank 21 is arranged below the water collection tank 12. The diversion module 20 comprises a water collection pipe 22, the water collection pipe 22 being connected between the water collection tank 21 and the hydro-generator 30. The water collecting pipe 22 includes a down pipe 221 and a water collecting pipe 222 connected to the down pipe 221. The water guiding module 20 is provided with an overflow pipe, the water inlet of the overflow pipe is higher than the water inlet of the descending pipe 221, and the overflow pipe is communicated with the water collecting pipe 222. The energy-saving device for the cooling tower provided by the embodiment is characterized in that a water collecting plate 11 is arranged at a proper position which is 0.5m-1.5m away from the bottom of a packing layer 110 under the packing layer 110 of the cooling tower 100, and is used for collecting water falling into a water collecting tank 21. A closed descending pipe 221 and an overflow pipe are arranged along the upright post, the descending pipe 221 is communicated with the water collecting tank 21, and the collected circulating water is led to the water collecting pipeline 22 in the water tank 120; the water collecting pipeline 22 is fixedly arranged in the water pool 120 at the bottom of the cooling tower, and the water collecting pipeline 22 is finally summarized to the water collecting pipe 222; the water-wheel generator 30 is arranged at the non-rain area at the edge of the water pool 120, the water inlet of the water-wheel generator 30 is connected with the water collecting pipe 222, and the water outlet is directly discharged into the water pool 120.

Further, please refer to fig. 1 and 2, in the cooling tower energy saving device provided in the present embodiment, the hydraulic generator 30 is disposed on the hydraulic turbine base 31. A plurality of hydraulic generators 30 are disposed around the cooling tower. The plurality of water collecting modules 10 are disposed in a horizontal direction at a portion or the entire area under the packing layer 110 of the cooling tower 100. In this embodiment, the water collection area is selected to be 30% -100% of the rain area as required.

As shown in fig. 1 and 2, the cooling tower energy-saving device provided in this embodiment has the following working principle:

compared with the conventional cooling tower, the cooling tower energy-saving device provided by the embodiment has the greatest advantages that the water is not sprayed into the tower pool, but is collected and converged into the water collecting tank 21 through the water collecting plate 11 and the water collecting ditch 12 which are arranged at high positions, potential energy of falling water after spraying is fully utilized, a higher pressure head is arranged in front of the water pump, the pump lift is greatly reduced, and the power of the circulating water pump is reduced, so that the purpose of saving energy is achieved.

Meanwhile, the baffle plate in the cooling tower has a flow guiding effect on the air inlet, and the cooling effect of the cooling tower is better than that of a conventional tower. The cooling tower has no rain area transverse resistance, the air distribution of the cooling tower is high in middle air quantity and low in peripheral air quantity, and meanwhile, the water collecting plate can homogenize ventilation flow, so that the cooling tower is more uniform in air distribution than a conventional tower, and the heat exchange effect is better under the same condition.

The working state of the cooling tower is the state that the thermodynamic balance of the hot water entering the tower and the air entering the tower and the suction force and the resistance of the tower barrel are balanced. The main area of the cooling tower for heat exchange is a water spraying filler area, and the heat exchange of the rain area is only a small part of the heat exchange of the whole tower. The rain area of the high-order water receiving cooling tower is smaller than that of a conventional tower, and the heat exchange capacity is reduced by about 3% compared with that of the conventional tower. Among the resistances of the cooling tower, the resistance of the rain area accounts for about 40%, and the rain falling height of the cooling tower is small, so that the ventilation resistance of the rain area is greatly reduced, the air inlet resistance of the cooling tower is smaller than that of a conventional tower, and the ventilation and heat exchange effects of the cooling tower are improved.

The cooling tower 100 has the advantage of low noise because the water spraying height is low, and the diversion module 20 is used for diversion of the rainwater collected by the water collecting module 10.

The newly-built cooling tower designs the water collecting module 10, and rainwater of the outlet packing layer 110 enters the airtight concrete pipe network after being collected by the water collecting module 10, and forms an inlet high-pressure water head for the circulating pump, so that the lift of the circulating pump is reduced, and the electric energy consumption is reduced.

Rainwater discharged from the filler layer 110 is collected by the water collecting module 10 at a high position, enters the water turbine base 31 through a closed pipe network, drives the water turbine to generate electricity, and is discharged into the tower bottom water pool 120.

The water collecting module 10 can be used for newly-built cooling towers, conventional cooling towers and rain areas with flexible area.

The bottom pool 120 is reserved, so that potential safety hazards such as water shortage, water leakage and the like are avoided; the investment is small.

Compared with the prior art, the cooling tower energy-saving device provided by the embodiment adopts the water collecting module, the flow guiding module and the hydraulic generator, the flow guiding module is connected between the water collecting module and the hydraulic generator, and the hydraulic generator is arranged at the edge of a pool at the bottom of the cooling tower. According to the cooling tower energy-saving device, the rain fall noise is reduced, and the noise source is pushed to the center of the cooling tower, so that the noise outside the cooling tower is reduced; the ventilation resistance is reduced, the ventilation quantity is increased, the air flow distribution characteristic is improved, the air distribution is more uniform, the cooling performance of the cooling tower is improved, and the cooling effect is better; the flow of the cooling system and the structure of the existing cooling tower are not changed, and potential safety hazards are avoided; the water falls into the water to generate electricity to generate direct economic benefit.

While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model. It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. The utility model provides a cooling tower economizer, its characterized in that includes water collecting module (10), water conservancy diversion module (20) and hydraulic generator (30), water conservancy diversion module (20) connect in between water collecting module (10) with hydraulic generator (30), hydraulic generator (30) are located cooling tower bottom water pool edge.

2. The cooling tower energy saving device according to claim 1, characterized in that the water collecting module (10) comprises a water collecting plate (11) and a water collecting channel (12) connected with the lower end of the water collecting plate (11).

3. Cooling tower energy saving device according to claim 2, characterized in that the water collection channel (12) is U-shaped in cross section.

4. Cooling tower energy saving device according to claim 2, characterized in that the flow guiding module (20) comprises a water collecting tank (21), which water collecting tank (21) is arranged below the water collecting tank (12).

5. Cooling tower energy saving device according to claim 4, characterized in that the diversion module (20) comprises a water collection pipe (22), which water collection pipe (22) is connected between the water collection tank (21) and the hydro generator (30).

6. The cooling tower energy saving device according to claim 5, characterized in that the water collecting pipe (22) comprises a down pipe (221) and a water collecting pipe (222) connected to the down pipe (221).

7. The cooling tower energy saving device according to claim 6, characterized in that the flow guiding module (20) is provided with an overflow pipe, the water inlet of the overflow pipe is higher than the water inlet of the down pipe (221), and the overflow pipe is communicated with the water collecting pipe (222).

8. Cooling tower energy saving device according to claim 1, characterized in that the hydro-generator (30) is arranged on a hydro-turbine foundation (31).

9. Cooling tower energy saving device according to claim 1, characterized in that a plurality of said hydro-generators (30) are arranged around the cooling tower.

10. Cooling tower energy saving device according to claim 1, characterized in that a plurality of said water collecting modules (10) are arranged in horizontal direction in a part or the whole area under the cooling tower packing layer.