CN220624961U - Device for reducing air cooling back pressure and preventing freezing in winter for direct air cooling unit in summer - Google Patents
Device for reducing air cooling back pressure and preventing freezing in winter for direct air cooling unit in summer Download PDFInfo
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- CN220624961U CN220624961U CN202322365067.2U CN202322365067U CN220624961U CN 220624961 U CN220624961 U CN 220624961U CN 202322365067 U CN202322365067 U CN 202322365067U CN 220624961 U CN220624961 U CN 220624961U
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- air cooling
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- air flow
- flow guide
- cooling unit
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- 238000001816 cooling Methods 0.000 title claims abstract description 99
- 238000007710 freezing Methods 0.000 title claims abstract description 18
- 230000008014 freezing Effects 0.000 title claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims abstract description 39
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000009882 destearinating Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000017525 heat dissipation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of direct air cooling units, in particular to a device for reducing air cooling back pressure and preventing freezing in winter of a direct air cooling unit, which comprises the following components: the adjustable air flow guide plate is used for being arranged at the outlet of the air cooling axial flow fan and is provided with an air flow direction adjusting plate with an adjustable angle; the actuating mechanism is connected with the adjustable air flow guide plate to control the air flow direction of the adjustable air flow guide plate to adjust the opening angle of the plate, and further control the flow direction and the distribution of air conveyed by the air cooling axial flow fan. The utility model completes the improvement and upgrade of the antifreezing device of the existing direct air cooling unit, and effectively solves the technical problems of low utilization efficiency of the heat transfer surface of the fin tube bundle and poor flowing heat transfer performance of cooling air and condenser wet steam caused by poor air flow guiding capability of the shutter wind shield in the prior art.
Description
Technical Field
The utility model relates to the technical field of direct air cooling units, in particular to a device for reducing air cooling back pressure and preventing freezing in winter for a direct air cooling unit in summer.
Background
The direct air cooling unit is a unit with steam turbine exhaust directly cooled by air, has remarkable water saving advantage, and is rapidly developed and widely applied in the northern coal-rich water-deficient areas of China. However, the problem that the air cooling island is frozen easily occurs in the direct air cooling unit under severe cold conditions, so that the safe and stable operation of the unit is seriously threatened, and the common method for preventing the air cooling island from being frozen by arranging the wind shields at the air outlet of the air cooling fan and the periphery of the air cooling fan can lead the operation backpressure of the unit to be larger, and the safe and economic operation of the unit is influenced.
Aiming at the problems, the patent document of the utility model with the authority of CN208567565U discloses an automatic antifreezing device of a direct air cooling unit of a power station based on a shutter wind shield, wherein three temperature measuring cables are respectively arranged on the air outlet surface side of a fin radiating tube bundle on two sides of each air cooling unit, three temperature measuring points are arranged in an equidistant manner, each temperature measuring cable is connected with a corresponding outlet data channel of a data monitoring unit of an air cooling island in a corresponding column, and when the temperature is detected to be lower and the freezing risk exists, the data monitoring unit sends a closing instruction to a corresponding automatic executing mechanism in time so as to close the shutter wind shield, so that the back pressure of the unit is reduced as much as possible under the condition that the fin radiating tube bundle of the air cooling island is not frozen, the antifreezing margin is reduced, and the thermal economy of the unit is improved.
However, when the device is used, because the direct air cooling unit is a frame structure formed by the fin tube bundles which are obliquely arranged at two sides at a certain included angle and the axial flow fan at the lower part, the air flow field in the frame space has the characteristic of obvious rotation rise and is distributed in a central symmetry manner, so that the cooling air flow distribution of the fin tube bundles of the air cooling unit is extremely uneven, the heat dissipation capacity of the fin tube bundles in different areas is greatly different, and the louver wind shield can not guide the air flow well, so that the utilization efficiency of the heat transfer surface of the fin tube bundles is low, and the flow heat transfer performance of the air cooling condenser is poor.
Disclosure of Invention
The utility model provides a device for reducing air cooling back pressure and preventing freezing in winter for a direct air cooling unit in summer, which aims to solve the technical problems of low utilization efficiency of heat transfer surfaces of fin tube bundles and poor flowing heat transfer performance of cooling air and condenser wet steam caused by poor air flow guiding capacity of a shutter wind shield in the prior art.
In order to solve the problems, the device for reducing the air cooling back pressure in summer and preventing freezing in winter for the direct air cooling unit provided by the utility model adopts the following technical scheme:
a device for reducing air cooling back pressure and preventing freezing in winter for a direct air cooling unit in summer comprises:
the adjustable air flow guide plate is used for being arranged at the outlet of the air cooling axial flow fan and is provided with an air flow direction adjusting plate with an adjustable angle;
the actuating mechanism is connected with the adjustable air flow guide plate to control the air flow direction of the adjustable air flow guide plate to adjust the opening angle of the plate, and further control the flow direction and the distribution of air conveyed by the air cooling axial flow fan.
The direct air cooling unit provided by the utility model has the beneficial effects that the air cooling back pressure is reduced in summer and the antifreezing device is used for preventing freezing in winter: the adjustable air flow guide plate is arranged at the outlet of the air cooling axial flow fan of the direct air cooling unit and is connected with the actuating mechanism, the opening angle of the plate can be adjusted by remotely controlling the air flow direction of the adjustable air flow guide plate through the actuating mechanism, so that the flow direction and the distribution of air conveyed by the air cooling axial flow fan are controlled, the distribution of the air is more uniform and reasonable, and the heat dissipation of the fin heat exchanger and the flow heat transfer property of the air cooling condenser are fully utilized. In summary, the utility model completes the improvement and the upgrade of the existing direct air cooling unit antifreezing device, and effectively solves the technical problems of low utilization efficiency of the heat transfer surface of the fin tube bundle and poor flow heat transfer performance of cooling air and condenser wet steam caused by poor air flow guiding capability of the shutter wind shield in the prior art.
Further, the adjustable air flow guide plate comprises a fixed frame, a plurality of air flow guide plates are rotatably arranged on the fixed frame, and the air flow direction adjusting plate is formed by the air flow guide plates.
Further, a plurality of the air flow guide plates are connected with the actuating mechanism through a linkage mechanism.
Further, the linkage mechanism comprises a connecting rod and a plurality of parallel branch transmission mechanisms connected with the connecting rod, the number of the branch transmission mechanisms is the same as that of the airflow guide plates, one ends of the branch transmission mechanisms are connected with the airflow guide plates, the other ends of the branch transmission mechanisms are connected with the connecting rod, and one end of the connecting rod is connected with the executing mechanism.
Further, the number of the linkage mechanisms is two.
Further, the two groups of linkage mechanisms are arranged at intervals in the length direction of the direct air cooling unit.
Further, the number of the airflow guide plates is fourteen.
Further, fourteen air flow guide plates are symmetrically arranged about an axis where the length direction of the direct air cooling unit is located.
Drawings
The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present utility model will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the utility model are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:
FIG. 1 is a schematic diagram of an application of a direct air cooling unit for reducing air cooling back pressure in summer and a winterizing device provided by the utility model;
fig. 2 is a schematic view of the adjustable airflow deflector of fig. 1 in use.
Reference numerals illustrate:
1. an air cooling axial flow fan; 2. an actuator; 3. a fixed frame; 4. an air flow guide plate; 5. a connecting rod; 6. a branch transmission mechanism; 7. a source of exhaust gas from the steam turbine; 8. a fin heat exchanger; 9. a condensate pipe; 10. a condensate header.
Detailed Description
The following description of the embodiments of the present utility model will be made more complete and clear to those skilled in the art by reference to the figures of the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The main conception of the device for reducing air cooling back pressure and preventing freezing in winter for the direct air cooling unit provided by the utility model is that: through the adjustable air flow guide plate that has air flow direction adjustment plate in air cooling axial fan's air outlet department installation, link to each other adjustable air flow guide plate and actuating mechanism simultaneously, can come the opening angle of adjustable air flow guide plate of remote control through actuating mechanism, and then the flow direction and the distribution of the air that control air cooling axial fan carried, make the distribution that air can more even reasonable on the fin heat exchanger, thereby give play to the heat dissipation function of fin heat exchanger better and better utilize the flow heat transfer nature of air cooling condenser, with the heat transfer surface utilization efficiency who leads to of fin tube bank low that the shutter deep bead guide air flow ability is poor among the prior art, and the technical problem that the flow heat transfer performance of cooling air and condenser wet steam is poor.
Having described the basic principles of the present utility model, various non-limiting embodiments of the utility model are described in detail below. Any number of elements in the figures are for illustration and not limitation, and any naming is used for distinction only and not for any limiting sense.
The principles and spirit of the present utility model are explained in detail below with reference to several representative embodiments thereof.
Embodiment 1 of the direct air cooling unit for reducing air cooling back pressure in summer and for preventing freezing in winter provided by the utility model:
as shown in fig. 1 and 2, the device for reducing air cooling back pressure in summer and preventing freezing in winter of the direct air cooling unit comprises an adjustable air flow guide plate and an actuating mechanism 2 connected with the adjustable air flow guide plate.
Specifically, the adjustable air flow guide plate is installed at the air outlet of the air cooling axial flow fan 1 and comprises a fixed frame 3, air flow direction adjusting plates formed by fourteen air flow guide plates 4 are rotatably installed on the fixed frame 3, the fourteen air flow guide plates 4 are symmetrically arranged about the axis where the length direction of the direct air cooling unit is located, and the adjustable air flow guide plate is divided into a, b, c, d, e, f diversion areas with seven different angles according to the actually measured wind speed diagram of the outlet section of the air cooling axial flow fan 1.
Finally, the connection between the adjustable air flow guide plate and the actuator 2 is described. Fourteen airflow guide plates 4 of the adjustable airflow guide plate are equally divided into two parts along the axis of the length direction of the direct air cooling unit, and each part is connected with one executing mechanism 2 through one linkage mechanism, so that the adjustable airflow guide plate is connected with a remote mechanism 2. Specifically, two link mechanisms are arranged at intervals according to the axial wind speed characteristics of the air flow in the length direction of the direct air cooling unit, each link mechanism comprises a connecting rod 5 and seven parallel-arranged branch transmission mechanisms 6, one end of each branch transmission mechanism 6 is connected with the air flow guide plate 4, the other end of each branch transmission mechanism is connected with the connecting rod 5, and the other end of each connecting rod 5 is connected with an executing mechanism 2.
The working principle of the device for reducing air cooling back pressure in summer and preventing freezing in winter of the direct air cooling unit provided by the utility model is as follows: when the air cooling axial flow fan 1 operates, natural air from the atmosphere is subjected to air flow boosting through the air cooling axial flow fan 1, the boosted air flow is discharged into the air cooling heat exchange cavity through the adjustable air flow guide plate, heat exchange is carried out between the boosted air flow and high-temperature wet steam from the steam turbine exhaust source 7 through the fin heat exchanger 8, condensed water condensed by the fin heat exchanger 8 flows into the condensed water pipe 9 through dead weight, and the collected condensed water guides the condensed water into the condensed water collecting tank through the condensed water collecting pipe 10. When the direct air cooling unit is in summer working condition, the flow direction of heat exchange air is guided by the adjustable air flow guide plate, so that an air flow vortex area formed at the outlet of the original air cooling axial flow fan 2 is reduced, the effective heat exchange area of the fin heat exchanger 8 is increased, the running back pressure of the unit is reduced, and the energy consumption of the unit is further reduced; when the direct air cooling unit is in a winter working condition, the opening angles of the adjustable air flow guide plates are adjusted through the actuating mechanism 2, so that all the air flow guide plates are in a closed state to form a wind-separating wall, and cooling air is effectively prevented from entering the fin heat exchanger 8 through the fan of the air cooling axial flow fan 1, and the aim of preventing freezing in winter is achieved.
Embodiment 2 of the direct air cooling unit for reducing air cooling back pressure in summer and for preventing freezing in winter provided by the utility model:
the differences from example 1 are mainly that:
in embodiment 1, the airflow direction adjusting plate member is constituted by fourteen airflow guide plates.
In this embodiment, the airflow direction adjusting plate is composed of a plurality of airflow guide plates, the number of which is determined according to the axial wind speed characteristics of the outlet airflow of the axial flow fan.
Embodiment 3 of the direct air cooling unit for reducing air cooling back pressure in summer and the winterizing device provided by the utility model:
the differences from example 1 are mainly that:
in embodiment 1, the number of the linkages is two.
In this embodiment, the number of the linkage mechanisms is one or more.
It will be further understood by those skilled in the art from the foregoing description of the present specification that terms such as "upper", "width", "length", "inner", and the like, which indicate an orientation or a positional relationship, are based on the orientation or the positional relationship shown in the drawings of the present specification, are for convenience only in explaining aspects of the present utility model and simplifying the description, and do not explicitly or implicitly indicate that the apparatus or element concerned must have the specific orientation, be constructed and operated in the specific orientation, and thus the above orientation or positional relationship terms should not be interpreted or construed as limiting the aspects of the present utility model.
In addition, in the description of the present specification, the meaning of "plurality" means at least two, for example, two, three or more, etc., unless specifically defined otherwise.
Claims (8)
1. The utility model provides a direct air cooling unit summer reduces air cooling backpressure and winterization device which characterized in that includes:
the adjustable air flow guide plate is used for being arranged at the outlet of the air cooling axial flow fan and is provided with an air flow direction adjusting plate with an adjustable angle;
the actuating mechanism is connected with the adjustable air flow guide plate to control the air flow direction of the adjustable air flow guide plate to adjust the opening angle of the plate, and further control the flow direction and the distribution of air conveyed by the air cooling axial flow fan.
2. The device for reducing air cooling back pressure and preventing freezing in winter for a direct air cooling unit according to claim 1, wherein the adjustable air flow guide plate comprises a fixed frame, a plurality of air flow guide plates are rotatably installed on the fixed frame, and the air flow direction adjusting plate is formed by the plurality of air flow guide plates.
3. The direct air cooling unit summer air cooling back pressure reducing and winterizing device of claim 2 wherein a plurality of said air flow guide plates are connected to said actuator by a linkage.
4. The device for reducing air cooling back pressure and preventing freezing in winter for a direct air cooling unit in summer according to claim 3, wherein the linkage mechanism comprises a connecting rod and a plurality of parallel branch transmission mechanisms connected with the connecting rod, the number of the branch transmission mechanisms is the same as that of the air flow guide plates, one ends of the branch transmission mechanisms are connected with the air flow guide plates, the other ends of the branch transmission mechanisms are connected with the connecting rod, and one ends of the connecting rod are connected with the executing mechanism.
5. The direct air cooling unit summer air cooling back pressure reducing and winterizing device according to claim 3 or 4, wherein the number of the linkage mechanisms is two.
6. The device for reducing air cooling back pressure and preventing freezing in winter for a direct air cooling unit according to claim 5, wherein the two sets of the linkage mechanisms are arranged at intervals along the length direction of the direct air cooling unit.
7. The direct air cooling unit summer air cooling back pressure reducing and winterizing apparatus as recited in any one of claims 2 to 4 wherein the number of air flow guide plates is fourteen.
8. The direct air-cooling unit summer air-cooling back pressure reducing and winterizing device according to claim 7, wherein fourteen air-flow guide plates are symmetrically arranged with respect to an axis where a longitudinal direction of the direct air-cooling unit is located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365067.2U CN220624961U (en) | 2023-08-31 | 2023-08-31 | Device for reducing air cooling back pressure and preventing freezing in winter for direct air cooling unit in summer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322365067.2U CN220624961U (en) | 2023-08-31 | 2023-08-31 | Device for reducing air cooling back pressure and preventing freezing in winter for direct air cooling unit in summer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220624961U true CN220624961U (en) | 2024-03-19 |
Family
ID=90232574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322365067.2U Active CN220624961U (en) | 2023-08-31 | 2023-08-31 | Device for reducing air cooling back pressure and preventing freezing in winter for direct air cooling unit in summer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220624961U (en) |
-
2023
- 2023-08-31 CN CN202322365067.2U patent/CN220624961U/en active Active
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