Exhaust preheating anti-condensation structure

Abstract

The utility model provides an exhaust preheating anti-condensation structure. The exhaust preheating anti-condensation structure comprises an air inlet gallery and an exhaust gallery which are arranged in parallel and share a partition wall. A first spiral air guide structure is arranged in the air inlet gallery; a second spiral air guide structure is arranged in the exhaust gallery; according to the single wind direction, the spiral direction of the second spiral wind guide structure is opposite to that of the first spiral wind guide structure. The utility model provides an exhaust preheating anti-condensation structure, which utilizes higher exhaust temperature of a hydropower station and realizes exhaust waste heat recovery to heat inlet air of the hydropower station through reasonable structural design, thereby reducing or avoiding condensation of air inlet galleries such as ventilation and traffic galleries and realizing dehumidification effect. The influence of condensation on cables, equipment and traffic grounds is further reduced, and the structure can effectively reduce energy consumption.

Description

Technical Field

[0001] The utility model relates to an anti-condensation structure, in particular to an exhaust preheating anti-condensation structure. Background Art

[0002] Pumped-storage power stations are typically constructed in underground powerhouses, where temperature and humidity control, particularly dehumidification, is crucial. Controlling the temperature and humidity in these underground powerhouses must not only meet the operational needs of personnel but also ensure the safe and reliable operation of electrical and electronic equipment.

[0003] Existing hydropower stations generally use conventional air conditioning combined with local dehumidifiers to control temperature and humidity in underground powerhouses, transportation corridors, and ventilation corridors. These dehumidifiers are primarily vapor compression refrigeration dehumidifiers, which use compressors to lower the ambient temperature to below the dew point for dehumidification. This dehumidification method consumes a large amount of electricity to drive the compressors, resulting in high energy consumption. Utility Model Content

[0004] In view of the defects of the prior art, the utility model provides an exhaust preheating and anti-condensation structure, which can effectively solve the above problems.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] The utility model provides an exhaust preheating and condensation prevention structure, comprising an air inlet corridor (1) and an air outlet corridor (2) which are arranged in parallel and share a partition wall; a first spiral air guide structure is arranged inside the air inlet corridor (1); a second spiral air guide structure is arranged inside the air outlet corridor (2); according to a single wind direction, the spiral directions of the second spiral air guide structure and the first spiral air guide structure are opposite.

[0007] Preferably, the first spiral air guide structure includes a plurality of spiral air guide units; each of the spiral air guide units includes a guide groove (3), a first guide protrusion (4) and a second guide protrusion (5); the guide groove (3), the first guide protrusion (4) and the second guide protrusion (5) are arranged alternately in sequence according to the air inlet direction; and the guide groove (3) is arranged on the bottom wall (1-1) of the air inlet corridor (1), the first guide protrusion (4) is arranged on the left wall (1-2) of the air inlet corridor (1), and the second guide protrusion (5) is arranged on the right wall (1-3) of the air inlet corridor (1).

[0008] Preferably, the windward surface of the guide groove (3) is an inclined surface, an arc-shaped convex surface or an arc-shaped inner concave surface.

[0009] Preferably, the first guide protrusion (4) and the second guide protrusion (5) have the same structure, and their windward surfaces are inclined surfaces, arc-shaped convex surfaces or arc-shaped concave surfaces; and their leeward surfaces are perpendicular to the wall surface.

[0010] Preferably, the axial directions of the guide groove (3), the first guide protrusion (4) and the second guide protrusion (5) are all arranged to be inclined relative to the incoming wind direction.

[0011] The utility model provides an exhaust preheating and anti-condensation structure with the following advantages:

[0012] The utility model provides an exhaust preheating and anti-condensation structure, which utilizes the high exhaust temperature of the hydropower station and realizes exhaust waste heat recovery to heat the hydropower station intake air through reasonable structural design, thereby reducing or avoiding condensation in the air intake corridors such as ventilation and traffic corridors, achieving a dehumidification effect, and further reducing the impact of condensation on cables, equipment and traffic ground. This structure can effectively reduce energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A three-dimensional diagram of the exhaust preheating and anti-condensation structure provided by the utility model;

[0014] Figure 2 A schematic diagram of the wind direction flow of the exhaust preheating and anti-condensation structure provided by the utility model;

[0015] Figure 3 A cross-sectional view of the wind direction flow of the exhaust preheating and anti-condensation structure provided by the present invention;

[0016] Figure 4 This is a schematic diagram of the first exhaust preheating and anti-condensation structure provided by the utility model;

[0017] Figure 5 This is a schematic diagram of the second exhaust preheating and anti-condensation structure provided by the present invention;

[0018] Figure 6 This is a schematic diagram of the third exhaust preheating and anti-condensation structure provided by the present invention;

[0019] Figure 7 A diagram showing the shape of the diversion protrusion provided by the present invention;

[0020] Figure 8 This is a diagram of the shape of the guide groove provided by the utility model. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] The utility model provides an exhaust preheating and anti-condensation structure, which utilizes the high exhaust temperature of the hydropower station and realizes exhaust waste heat recovery to heat the hydropower station intake air through reasonable structural design, thereby reducing or avoiding condensation in the air intake corridors such as ventilation and traffic corridors, achieving a dehumidification effect, and further reducing the impact of condensation on cables, equipment and traffic ground. This structure can effectively reduce energy consumption.

[0023] Specifically, such as Figures 1 to 8 As shown, the utility model provides an exhaust preheating and anti-condensation structure, including an air inlet corridor 1 and an exhaust corridor 2 which are arranged in parallel and share a partition wall; a first spiral air guide structure is arranged inside the air inlet corridor 1; a second spiral air guide structure is arranged inside the exhaust corridor 2; according to a single wind direction, the spiral directions of the second spiral air guide structure and the first spiral air guide structure are opposite. By arranging the first spiral air guide structure and the second spiral air guide structure, the heat exchange between the air inlet corridor 1 and the exhaust corridor 2 can be enhanced, so that the waste heat of the exhaust air in the exhaust corridor 2 heats the intake air of the air inlet corridor 1.

[0024] In a single wind direction, the second spiral air guide structure and the first spiral air guide structure have opposite spiral directions. Taking the first spiral air guide structure as an example, the first spiral air guide structure includes multiple spiral air guide units; each spiral air guide unit includes a guide groove 3, a first guide protrusion 4, and a second guide protrusion 5; the guide grooves 3, the first guide protrusion 4, and the second guide protrusion 5 are arranged alternately in the direction of the incoming air; and the guide groove 3 is arranged on the bottom wall 1-1 of the air inlet corridor 1, the first guide protrusion 4 is arranged on the left wall 1-2 of the air inlet corridor 1, and the second guide protrusion 5 is arranged on the right wall 1-3 of the air inlet corridor 1.

[0025] By setting the guide protrusions on the side wall, the wall air flow is guided to form a spiral shape, and the bottom layer of the air laminar flow is thinned to enhance heat exchange; by setting the guide grooves on the bottom wall, the wall air flow is guided to form a spiral shape, and the bottom layer of the air laminar flow is thinned to enhance heat exchange; the guide protrusions and guide grooves together form a spiral air guide unit, so that the air inlet of the ventilation corridor, traffic corridor, etc., forms a large longitudinal trough. The exhaust of the exhaust corridor 2 forms a large longitudinal trough, thereby enhancing the heat exchange of the intake and exhaust air. Figure 2 and Figure 3 As shown, it is a comparison diagram of the wind directions of the air intake of the air intake corridor 1 and the exhaust of the exhaust corridor 2.

[0026] The basic working process is:

[0027] Under the influence of the air conditioning or ventilation system of a pumped-storage power station, outside air enters the hydropower station through an inlet corridor 1, which includes ventilation corridors and traffic corridors. After being processed by the air conditioning units, it is sent to the powerhouse to meet the heat dissipation needs of the equipment and the fresh air needs of the personnel. After passing through the powerhouse, the heated air is discharged into the atmosphere through an exhaust corridor 2. The inlet corridor 1 and the exhaust corridor 2 share a corridor and are separated by a solid wall. At this time, the high-temperature exhaust air flowing through the exhaust corridor 2 will heat the incoming air flowing through the inlet corridor 1, thereby increasing the dew point temperature of the incoming air and reducing the condensation time. However, due to the low inlet air velocity and the large section area of ​​the inlet corridor 1, the incoming and exhaust air cannot form an effective heat exchange, and the waste heat recovery effect is poor.

[0028] In the present application, by setting guide grooves and guide protrusions in the air inlet corridor 1 and the air exhaust corridor 2, due to the presence of the guide protrusions and guide grooves, the air inlet of the air inlet corridor 1 will form a spiral air inlet state (a large longitudinal trough), which on the one hand strengthens the heat exchange between the shared wall and the air inlet, and on the other hand makes the air temperature in the air inlet corridor 1 more uniform, realizes the full absorption of the residual heat, further reduces the condensation time or does not condense. Similarly, the guide protrusions and guide grooves of the exhaust corridor 2 make the exhaust form a large longitudinal trough, strengthen the heat exchange between the exhaust and the shared wall, and transfer more residual heat to the air inlet side.

[0029] In addition, the inventors have found through research that heat exchange can be further enhanced when the guide groove 3, the first guide protrusion 4 and the second guide protrusion 5 are designed in the following three forms:

[0030] The windward surface of the guide groove 3 is an inclined surface, an arc-shaped convex surface or an arc-shaped inner concave surface;

[0031] The first guide protrusion 4 and the second guide protrusion 5 have the same structure, and their windward surfaces are inclined surfaces, arc-shaped convex surfaces or arc-shaped concave surfaces; the leeward surfaces are perpendicular to the wall surface; and the axial directions of the guide groove 3, the first guide protrusion 4 and the second guide protrusion 5 are all inclined relative to the incoming wind direction.

[0032] like Figure 4 , which is a schematic diagram of the first exhaust preheating and anti-condensation structure provided by the present invention; in the figure, the windward surfaces of the guide groove 3 and the guide protrusion are inclined surfaces;

[0033] like Figure 5 , which is a schematic diagram of the second exhaust preheating and anti-condensation structure provided by the present invention; in the figure, the windward surfaces of the guide groove 3 and the guide protrusion are arc-shaped protrusions;

[0034] like Figure 6 , which is a schematic diagram of the third exhaust preheating and anti-condensation structure provided by the present invention; in the figure, the windward surfaces of the guide groove 3 and the guide protrusion are arc-shaped inner concave surfaces;

[0035] like Figure 7 As shown in the figure, there are three shapes of guide protrusions; Figure 8 As shown in FIG. 1 , there are three shapes of guide grooves.

[0036] The utility model provides an exhaust preheating and condensation prevention structure with the following characteristics:

[0037] 1. By setting up an overall spiral ventilation guide structure, the heat exchange of incoming and exhaust air is enhanced and the waste heat is fully utilized, the condensation time of the incoming air is reduced or condensation is avoided, and the dehumidification effect is achieved.

[0038] 2. The combination of raised guide structure and groove guide structure is adopted in the air inlet corridor and exhaust corridor, which will not affect the normal use of the corridor;

[0039] 3. The combination of air inlet and exhaust diversion, because the wind directions are opposite, the diversion structures are "opposite" when viewed in the same direction, which further enhances heat exchange;

[0040] 4. The pitch of the spiral structure is related to the wind speed. The greater the wind speed, the greater the pitch, and the smaller the wind speed, the smaller the pitch.

[0041] 5. The guide protrusion and guide groove structure has a streamlined windward side and a leeward side perpendicular to the wall, which can form a local longitudinal groove to further enhance heat exchange.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An exhaust air preheating and anti-condensation structure, characterized in that: It comprises an air inlet corridor (1) and an air exhaust corridor (2) which are arranged in parallel and share a partition wall; a first spiral air guide structure is arranged inside the air inlet corridor (1); a second spiral air guide structure is arranged inside the air exhaust corridor (2); in a single wind direction, the spiral directions of the second spiral air guide structure and the first spiral air guide structure are opposite.

2. The exhaust air preheating and condensation prevention structure according to claim 1, characterized in that: The first spiral air guide structure comprises a plurality of spiral air guide units; each of the spiral air guide units comprises a guide groove (3), a first guide protrusion (4) and a second guide protrusion (5); the guide groove (3), the first guide protrusion (4) and the second guide protrusion (5) are arranged alternately in sequence according to the air inlet direction; and the guide groove (3) is arranged on the bottom wall surface (1-1) of the air inlet corridor (1), the first guide protrusion (4) is arranged on the left wall surface (1-2) of the air inlet corridor (1), and the second guide protrusion (5) is arranged on the right wall surface (1-3) of the air inlet corridor (1).

3. The exhaust air preheating and condensation prevention structure according to claim 2, characterized in that: The windward surface of the guide groove (3) is an inclined surface, an arc-shaped convex surface or an arc-shaped inner concave surface.

4. The exhaust air preheating and anti-condensation structure according to claim 2, characterized in that: The first flow-guiding protrusion (4) and the second flow-guiding protrusion (5) have the same structure, and their windward surfaces are inclined surfaces, arc-shaped convex surfaces or arc-shaped inner concave surfaces; and their leeward surfaces are perpendicular to the wall surface.

5. The exhaust air preheating and condensation prevention structure according to claim 2, characterized in that: The axial directions of the guide groove (3), the first guide protrusion (4) and the second guide protrusion (5) are all arranged to be inclined relative to the wind direction.

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