CN219265019U - Mechanical power-assisted natural ventilation direct air cooling system - Google Patents
Mechanical power-assisted natural ventilation direct air cooling system Download PDFInfo
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- CN219265019U CN219265019U CN202223477992.6U CN202223477992U CN219265019U CN 219265019 U CN219265019 U CN 219265019U CN 202223477992 U CN202223477992 U CN 202223477992U CN 219265019 U CN219265019 U CN 219265019U
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Abstract
The utility model discloses a mechanical power-assisted natural ventilation direct air cooling system, which comprises: the air cooling heat exchangers, the cooling towers, the airflow distribution shutter and the axial flow fan unit, wherein one end of an external steam turbine is connected with a steam pipeline, a plurality of steam distribution pipelines are connected to the steam pipeline, each air cooling heat exchanger is at least connected with a steam distribution pipeline, each air cooling heat exchanger is connected with at least one condensed water pipeline, a plurality of condensed water pipelines are connected to a boiler pipeline, and the boiler pipeline is connected with external boiler equipment; the cooling tower is provided with a ventilation port; an air flow circulation channel is formed from the air flow distribution shutter to the air outlet of the cooling tower through the air cooling heat exchanger and the heat exchange port of the cooling tower in sequence; the axial flow fan unit is arranged on the airflow passage. The heat exchange performance of the cooling unit is improved in high-temperature weather; and excessive heat exchange capacity generated by mechanical ventilation of the cooling unit is avoided in low-temperature weather.
Description
Technical Field
The utility model relates to the technical field of industrial cooling, in particular to a mechanical power-assisted natural ventilation direct air cooling system.
Background
In the power production process, the exhaust steam exhausted by the steam turbine is required to be condensed into water and then sent back to the boiler for recycling. The prior air cooling system is divided into a mechanical ventilation direct air cooling system, a natural ventilation indirect air cooling system and a mechanical ventilation indirect air cooling system. The mechanical ventilation direct air cooling system drives air flow to pass through the surface of the finned tube bundle through an axial flow fan, absorbs heat of the tube bundle by utilizing the principle of forced convection heat exchange between the air flow and the surface of the finned tube, reduces the temperature of exhaust steam in the tube bundle, and realizes condensation of water vapor.
In a natural ventilation indirect air cooling system, a condenser utilizes cooling water to condense exhaust gas of a steam turbine. The heated cooling water enters a radiator of the cooling tower through a pressurized water pump, natural convection heat exchange between the surface of a finned tube bundle of the radiator and air is utilized to reduce the temperature of the cooling water, and then the low-temperature cooling water is reintroduced into a condenser to exchange heat with exhaust steam of a steam turbine.
The mechanical ventilation indirect air cooling system utilizes cooling water to condense the exhaust gas of the steam turbine in the condenser. The heated cooling water enters a radiator of the cooling tower through a pressurized water pump, the heat of the tube bundle is absorbed to reduce the temperature of the cooling water in the tube bundle by utilizing the principle of forced convection heat exchange between the air flow and the surfaces of the finned tubes, and then the cooling water is reintroduced into a condenser to exchange heat with exhaust steam of a steam turbine.
The existing air cooling system has the defects that:
1. the mechanical ventilation direct air cooling requires the axial flow fan unit to continuously work as a heat exchanger to provide stable air flow, and the power consumption of the axial flow fan is high, so that the operation efficiency of the power station is reduced.
2. The heat exchange performance of the natural ventilation indirect air cooling system is reduced in high-temperature weather, and the cooling water is required to be led into the cooling tower from the condenser by utilizing a high-power water pump, so that a large amount of power is consumed.
3. The mechanical ventilation indirect air cooling system needs the axial flow fan unit to work as a heat exchanger to provide stable air flow all the year round, and meanwhile, cooling water can enter the cooling tower after being pressurized by a high-power water pump. The operation of the water pump and the axial flow fan increases the electric energy loss.
Disclosure of Invention
In view of the above, the present utility model aims to provide a mechanical power-assisted natural ventilation direct air cooling system.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a mechanically assisted natural draft direct air cooling system, comprising:
one end of an external steam turbine is connected with a steam pipeline, a plurality of steam distribution pipelines are connected to the steam pipeline, each air cooling heat exchanger is at least connected with one steam distribution pipeline, each air cooling heat exchanger is connected with at least one condensate pipeline, a plurality of condensate pipelines are connected to a boiler pipeline, and the boiler pipeline is connected with external boiler equipment;
the cooling tower is columnar, the steam turbine is arranged on one side of the cooling tower, a plurality of air-cooling heat exchangers are arranged in an annular array with the cooling tower as a center, and ventilation ports are formed in the positions, corresponding to the air-cooling heat exchangers, of the cooling tower;
each air flow distribution louver is matched with one air cooling heat exchanger, each air flow distribution louver is arranged on one side of the corresponding air cooling heat exchanger opposite to the corresponding air cooling heat exchanger, and an air flow passage is formed from the air flow distribution louver to the exhaust port of the cooling tower through the air cooling heat exchanger and the ventilation port of the cooling tower in sequence;
the axial flow fan unit is arranged on the airflow circulation channel.
The mechanical power-assisted natural ventilation direct air cooling system, wherein the cooling tower comprises:
the cooling tower support structure is in a boss shape, the size of the bottom of the cooling tower support structure is larger than that of the top of the cooling tower support structure, and the ventilation port is formed in the cooling tower support structure;
the cooling tower body is in a boss shape, and the size of the bottom of the cooling tower body is larger than that of the top of the cooling tower.
The mechanical power-assisted natural ventilation direct air cooling system, wherein the cooling tower comprises: the cooling tower comprises a cooling tower supporting structure and a cooling tower body, wherein the ventilation opening is formed in the cooling tower supporting structure, and the cooling tower body is arranged on the cooling tower supporting structure.
The mechanical power-assisted natural ventilation direct air cooling system is characterized in that the air flow distribution louver and the air cooling heat exchanger are arranged below the outer edge of the cooling tower.
The mechanical power-assisted natural ventilation direct air cooling system is characterized in that each axial flow fan unit is arranged on one side of the air flow distribution louver opposite to the air cooling heat exchanger.
The mechanical power-assisted natural ventilation direct air cooling system is characterized in that the axial flow fan unit is arranged below the outer edge of the cooling tower.
The mechanical power-assisted natural ventilation direct air cooling system is characterized in that the axial flow fan unit is arranged in the cooling tower, the axial flow fan unit is horizontally arranged, and the axial flow fan unit is connected with the inner surface of the cooling tower.
The mechanical power-assisted natural ventilation direct air cooling system comprises at least one part of the steam pipeline, at least one part of the boiler pipeline, at least one part of the steam distribution pipeline and at least one part of the condensed water pipeline.
The mechanical power-assisted natural ventilation direct air cooling system is characterized in that the connecting line direction of the two ventilation ports is the same as the direction of the wind direction at the connecting line.
The utility model adopts the technology, so that compared with the prior art, the utility model has the positive effects that:
(1) According to the utility model, the heat exchange performance of the cooling unit is improved in high-temperature weather, the back pressure of the turbine required by the cooling system is reduced, the extreme load operation of the turbine is avoided, and the working efficiency of the turbine and the stability of the generator unit are improved. And excessive heat exchange capacity generated by mechanical ventilation of the cooling unit is avoided in low-temperature weather, and electric energy loss is reduced. The system utilizes the back pressure of the steam turbine to directly convey exhaust steam to the cooling tower to replace a high-pressure water pump for conveying water, so that the energy consumption of the water pump of the cooling unit is eliminated, and the performance of the cooling unit is further improved.
Drawings
Fig. 1 is a schematic diagram of a first embodiment of the mechanically assisted natural draft direct air cooling system of the present utility model.
Fig. 2 is a schematic diagram of a second embodiment of the mechanically assisted natural draft direct air cooling system of the present utility model.
In the accompanying drawings: 1. a steam turbine; 2. an airflow distribution louver; 3. an air-cooled heat exchanger; 4. an axial flow fan unit; 5. a cooling tower; 51. a cooling tower support structure; 511. a ventilation port; 52. cooling the tower body of the tower; 53. the outer edge of the cooling tower; 6. a steam pipe; 7. a steam distribution pipe; 8. a condensed water pipe; 9. boiler pipes.
Detailed Description
The present utility model will be further described with reference to the accompanying drawings and specific embodiments, but not by way of limitation, and FIG. 1 is a schematic diagram of a first embodiment of a mechanically assisted natural draft direct air cooling system according to the present utility model; fig. 2 is a schematic diagram of a second embodiment of the mechanical assisted natural draft direct air cooling system of the present utility model, referring to fig. 1 to 2, showing a mechanical assisted natural draft direct air cooling system of a preferred embodiment, comprising: the air-cooled heat exchangers 3, the cooling towers 5, the airflow distribution louver 2 and the axial flow fan unit 4, wherein one end of the external steam turbine 1 is connected with a steam pipeline 6, a plurality of steam distribution pipelines 7 are connected to the steam pipeline 6, at least one steam distribution pipeline 7 is connected to each air-cooled heat exchanger 3, at least one condensation pipeline 8 is connected to each air-cooled heat exchanger 3, a plurality of condensation pipelines 8 are connected to a boiler pipeline 9, and the boiler pipeline 9 is connected to external boiler equipment; the cooling tower 5 is columnar, the steam turbine 1 is arranged on one side of the cooling tower 5, the plurality of air-cooled heat exchangers 3 are arranged in an annular array by taking the cooling tower 5 as a center, and ventilation ports 511 are formed in the cooling tower 5 at positions corresponding to the air-cooled heat exchangers 3; each air flow distribution shutter 2 is matched with one air-cooled heat exchanger 3, each air flow distribution shutter 2 is arranged on one side of the corresponding air-cooled heat exchanger 3 opposite to the cooling tower 5, and an air flow passage is formed from the air flow distribution shutter 2 to the exhaust port of the cooling tower 5 through the air-cooled heat exchanger 3 and the ventilation port of the cooling tower 5 in sequence; the axial flow fan unit 4 is arranged on the airflow circulation channel.
In a preferred embodiment, the cooling tower 5 comprises: a cooling tower supporting structure 51 and a cooling tower body 52, the ventilation opening 511 is arranged on the cooling tower supporting structure 51, and the cooling tower body 52 is arranged on the cooling tower supporting structure 51.
In a preferred embodiment, the cooling tower 5 further comprises: the cooling tower outer edge 53, the cooling tower outer edge 53 connects the cooling tower support structure 51 and the cooling tower body 52, and the cooling tower outer edge 53 is disposed along and extends outwardly from the outer edge of the lower surface of the cooling tower 5 and the outer edge of the upper surface of the cooling tower support structure 51.
The foregoing is merely a preferred embodiment of the present utility model, and is not intended to limit the embodiments and the protection scope of the present utility model.
The present utility model has the following embodiments based on the above description:
in a further embodiment of the utility model, both the air flow distribution louver 2 and the air-cooled heat exchanger 3 are arranged below the cooling tower outer edge 53.
In a further embodiment of the present utility model, each axial fan unit 4 is disposed on a side of an airflow distribution louver 2 opposite to the air-cooled heat exchanger 3.
In a further embodiment of the utility model, the axial fan unit 4 is arranged below the outer edge 53 of the cooling tower.
In a further embodiment of the utility model, the axial flow fan unit 4 is arranged in the cooling tower 5, the axial flow fan unit 4 is horizontally arranged, and the axial flow fan unit 4 is connected with the inner surface of the cooling tower 5.
In a further embodiment of the utility model, at least a part of the steam pipe 6, at least a part of the boiler pipe 9, at least a part of the steam distribution pipe 7 and at least a part of the condensate pipe 8 are all arranged underground.
In a further embodiment of the utility model, the direction of the connection of the two ventilation openings 511 is the same as the direction of the wind.
In a preferred embodiment, the device replaces a mechanical ventilation direct air cooling system, a natural ventilation indirect air cooling system and a mechanical ventilation indirect air cooling system with a natural ventilation direct air cooling system. The system reduces the running time of the axial flow fan, cancels the use of the high-pressure water pump, effectively eliminates or reduces the defects existing in the prior art, reduces the electric energy consumption of the cooling unit, improves the heat exchange performance in high-temperature weather, and strengthens the economic performance of the unit operation.
In a preferred embodiment, the device utilizes the axial flow fan unit 4 to provide mechanical ventilation for a natural ventilation direct air cooling system in high-temperature weather, and utilizes forced convection heat exchange between the surfaces of the fin tube bundles of the air cooling heat exchanger 3 and air to replace natural convection heat exchange, so that the heat exchange capacity is enhanced;
in a preferred embodiment, as in fig. 1, the blower type mechanical ventilation booster system, the axial fan unit 4 is located at the bottom of the cooling tower body 52, and is arranged along the ventilation opening 511.
In another preferred embodiment, as shown in fig. 2, the induced draft mechanical draft booster system, the axial fan assembly 4 is located inside the cooling tower 5.
In a preferred embodiment, the device utilizes the back pressure of the steam turbine 1 to convey the exhaust steam into the air-cooled heat exchanger 3 of the cooling tower 5. Starting an axial flow fan unit 4 in high-temperature weather, providing forced ventilation airflow for the air-cooled heat exchanger 3 in the cooling tower 5, and enhancing heat exchange capacity of the air-cooled heat exchanger 3 in the cooling tower 5 by mechanical ventilation;
in another preferred embodiment, the axial flow fan unit 4 stops working in low temperature weather and locks the rotating shaft of the axial flow fan, and the air-cooled heat exchanger 3 in the cooling tower 5 exchanges heat by natural ventilation.
In a preferred embodiment, as shown in fig. 1, the axial flow fan unit 4 is located at the bottom of the cooling tower body 52, and is arranged in the direction of the intake air; in the power production process, the device utilizes the back pressure of the steam turbine 1 to convey the dead steam to the air-cooled heat exchanger 3 through the steam pipeline 6 and the steam distribution pipeline 7; the cooled condensate water enters the boiler pipeline 9 through the condensate pipeline 8 and returns to the boiler. The air enters the cooling tower 5 from the air inlet direction, enters the air-cooled heat exchanger 3 through the air flow distribution louver 2 for heat exchange, and leaves through the air outlet of the cooling tower 5 along the air flow direction and the air outlet direction in the tower. Under the condition of high temperature weather, the axial flow fan unit 4 is started, air is blown to the air cooling heat exchanger 3, and the heat exchange work of the air cooling heat exchanger 3 is completed by utilizing forced convection. Under the condition of low temperature weather, the axial flow fan unit 4 is closed, and the heat exchange work of the air-cooled heat exchanger 3 is completed by utilizing natural convection of air and the air flow is driven.
In another preferred embodiment, as shown in fig. 2, the axial fan unit 4 is located within the cooling tower body 52; in the power production process, the device utilizes the back pressure of the steam turbine 1 to convey the dead steam to the air-cooled heat exchanger 3 through the steam pipeline 6 and the steam distribution pipeline 7. The cooled condensate water enters a boiler pipeline 9 through a condensate pipeline 8 and returns to the boiler; the air enters the cooling tower 5 from the air inlet direction, enters the air-cooled heat exchanger 3 through the air flow distribution louver 2 for heat exchange, and leaves through the air outlet of the cooling tower 5 along the air flow direction and the air outlet direction in the tower; under the condition of high temperature weather, the axial flow fan unit 4 is started, air is introduced into the cooling tower 5, and the forced convection is utilized to complete the heat exchange work of the air cooling heat exchanger 3; under the condition of low temperature weather, the axial flow fan unit 4 is closed, and the heat exchange work of the air-cooled heat exchanger 3 is completed by utilizing natural convection of air and the air flow is driven.
The foregoing is merely illustrative of the preferred embodiments of the present utility model and is not intended to limit the embodiments and scope of the present utility model, and it should be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included in the scope of the present utility model.
Claims (9)
1. A mechanical assist natural draft direct air cooling system, comprising:
one end of an external steam turbine is connected with a steam pipeline, a plurality of steam distribution pipelines are connected to the steam pipeline, each air cooling heat exchanger is at least connected with one steam distribution pipeline, each air cooling heat exchanger is connected with at least one condensate pipeline, a plurality of condensate pipelines are connected to a boiler pipeline, and the boiler pipeline is connected with external boiler equipment;
the cooling tower is columnar, the steam turbine is arranged on one side of the cooling tower, a plurality of air-cooling heat exchangers are arranged in an annular array with the cooling tower as a center, and ventilation ports are formed in the positions, corresponding to the air-cooling heat exchangers, of the cooling tower;
each air flow distribution louver is matched with one air cooling heat exchanger, each air flow distribution louver is arranged on one side of the corresponding air cooling heat exchanger opposite to the corresponding air cooling heat exchanger, and an air flow passage is formed from the air flow distribution louver to the exhaust port of the cooling tower through the air cooling heat exchanger and the ventilation port of the cooling tower in sequence;
the axial flow fan unit is arranged on the airflow circulation channel.
2. The mechanical assist natural draft direct air cooling system as set forth in claim 1 wherein said cooling tower includes: the cooling tower comprises a cooling tower supporting structure and a cooling tower body, wherein the ventilation opening is formed in the cooling tower supporting structure, and the cooling tower body is arranged on the cooling tower supporting structure.
3. The mechanical assist natural draft direct air cooling system as set forth in claim 2 wherein said cooling tower further includes:
the cooling tower outer edge is connected with the cooling tower supporting structure and the cooling tower body, and the cooling tower outer edge is arranged along the outer edge of the lower surface of the cooling tower and the outer edge of the upper surface of the cooling tower supporting structure and extends outwards.
4. The mechanical assist natural draft direct air cooling system as set forth in claim 3 wherein said air flow distribution louver and said air cooling heat exchanger are both disposed below said cooling tower outer edge.
5. A mechanically assisted natural draft direct air cooling system according to claim 3 wherein each said axial flow fan assembly is disposed on a side of said air flow distribution louver opposite said air cooling heat exchanger.
6. The mechanical assist natural draft direct air cooling system as set forth in claim 4 wherein said axial flow fan assembly is disposed below an outer edge of said cooling tower.
7. The mechanical assist natural draft direct air cooling system as set forth in claim 1 wherein said axial flow fan unit is disposed within said cooling tower, said axial flow fan unit being horizontally disposed, said axial flow fan unit being coupled to an inner surface of said cooling tower.
8. The mechanical assist natural draft direct air cooling system as set forth in claim 7 wherein at least a portion of said steam line, at least a portion of said boiler line, at least a portion of said steam distribution line, and at least a portion of said condensate line are all disposed underground.
9. The mechanical assist natural draft direct air cooling system according to claim 1 wherein the direction of the line connecting the two ventilation ports is the same as the direction of the wind therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223477992.6U CN219265019U (en) | 2022-12-26 | 2022-12-26 | Mechanical power-assisted natural ventilation direct air cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223477992.6U CN219265019U (en) | 2022-12-26 | 2022-12-26 | Mechanical power-assisted natural ventilation direct air cooling system |
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| Publication Number | Publication Date |
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| CN219265019U true CN219265019U (en) | 2023-06-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223477992.6U Active CN219265019U (en) | 2022-12-26 | 2022-12-26 | Mechanical power-assisted natural ventilation direct air cooling system |
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| CN (1) | CN219265019U (en) |
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- 2022-12-26 CN CN202223477992.6U patent/CN219265019U/en active Active
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