KR101763629B1

KR101763629B1 - A air mixer for vapor reduction

Info

Publication number: KR101763629B1
Application number: KR1020160016032A
Authority: KR
Inventors: 이윤수
Original assignee: (주)휴텍
Priority date: 2016-02-12
Filing date: 2016-02-12
Publication date: 2017-08-09

Abstract

The air mixer for reducing steam according to the present invention includes: an external air inflow part formed by extending a plurality of horizontal conveyance passages horizontally conveyed; a plurality of vertical conveyance passages crossing each other so that two or more vertical conveyance passages are extended in a vertical direction; A plurality of horizontally extending independent horizontal conveyance passages are formed and the height of the horizontal conveyance passage 71 becomes smaller as the height of the horizontal conveyance passage 71 increases from the lower portion to the upper portion, Temperature air which is uniformly transferred to the inside of the mixing space in the cooling tower is uniformly mixed with the high temperature and high humidity air which is conveyed in the perpendicular direction through the horizontal conveyance passage so that the absolute humidity is remarkably lowered, The steam generation phenomenon is greatly reduced.

Description

[0001] The present invention relates to an air mixer for vapor reduction,

The present invention relates to an air mixer for reducing steam, and more specifically, a separate heat exchanger using cooling water as a heat source is provided at the front end of a cooling tower exhaust part to allow passage of cold outside air to reduce sensible heat of cooling water, And it is possible to effectively reduce the water vapor in the cooling tower by transferring the mesophilic dry air to the intended distance with various distances and mixing it with the high temperature and high humidity air through the wet heat exchanger through the packing in the existing cooling tower To an air mixer for reducing steam

In recent years, due to changes in society 's perception of environmental pollution and strengthening of related laws, environmental pollution problems are considered in design in most industrial fields. In cooling towers, most attention is focused on prevention of water vapor.

In the case of cooling towers installed in airports, near roads or in densely populated areas, consideration of water vapor as a visual pollution must be reflected in the design and various methods have been suggested until recently to prevent the reduction of water vapor.

The water vapor in the cooling tower is generated when the saturated water vapor released from the cooling tower is mixed with the cool outside air and exceeds the saturation curve. It can not be removed naturally. To suppress the generation of water vapor, .

In other words, a mechanical air conditioner that lowers the relative humidity in a saturated moisture ventilator must be accompanied, and these mechanical devices have been developed and reflected in many types of changes and technologies. Among them, a wet / dry cooling tower is actually used in practice.

A steam reduction cooling tower (called Wet / Dry or Mixed Cooling Tower) is a form developed as an important solution to the water vapor problem in a wet (evaporative) cooling tower, which is in the form of a combination of wet and dry cooling towers. The combination of wet and dry results in lowering the relative humidity of the air leaving the cooling tower, and the cogeneration, heat recovery, and independent power plant construction around residential areas, airports and highways have shown a high interest in reducing water vapor .

The conventional cooling tower A for reducing steam is provided with a blower 101 at the upper end of the casing 100 and a dry heat exchanger 102 of the fin tube type below the blower 101, And a wet heat exchanger 103 composed of a filler unit. In the conventional cooling tower A of this type, the cooling water exchanges heat with the cool outside air through the heat exchanging part 102 of the fin tube type, the outside air passing through the heat exchanging part 102 becomes the air a2, The air is mixed with the hot and humid air a1 through the wet heat exchanger 103 by the blower 101 and discharged through the air outlet provided with the blower 101 to reduce water vapor.

However, in the conventional cooling tower A as shown in FIG. 1, the high temperature and high humidity air a1 passing through the wet heat exchanger 103 through the packing in the cooling tower A and the air The high temperature and high humidity air a1 can not be sufficiently mixed with the air a2 which is heavily dried through the dry heat exchanger 102 and can not be sufficiently mixed at the exhaust port above the cooling tower A, (A2) is discharged at a temperature boundary layer at the outer portion of the exhaust port 104 of the cooling tower (A), so that it is difficult to obtain a clear effect of reducing the steam, and the density of the center portion The height is adversely affected, and the partial steam at the center portion rises to a higher level, which may cause a larger problem.

2, the structure of the conventional wet cooling tower A is such that the cooling water of the middle temperature is supplied to the inside of the cooling tower A through the cooling water spraying unit 107, And is discharged to the cool water of low temperature through the exchange of heat and material with the outside air. On the other hand, the outside air which has been dried at a low temperature is exchanged with the hot and humid air in the filler unit 108 and discharged through the discharge unit 109. When the hot and humid air meets the low temperature and dry air of the outside air and the conditioned air passes through the saturation curve of the humidifier line, there is a problem that water vapor is generated due to condensation while being discharged to the outside.

In order to solve this problem, in the invention entitled " cooling tower equipped with an air distributor for reducing white smoke, " in Korean Patent No. 10-0881163, as shown in FIG. 3, a wet heat exchanger 2 is disposed in the upper part of the exhaust heat exchanging part 2 and an exhaust part 3 for exhausting air is disposed in the upper part and an air distributor 5 for reducing white smoke is provided between the exhaust part 3 and the wet heat exchanging part 2, 4, the reducing air distributor 5 includes a plurality of hollow inclined pipes 51 which are inclined downward from one side and joined together in a sun to form an air distribution element 50, One side wall 50a of the distribution element 50 is opened and a damper 52 for air conditioning, an air filter 53 and a hot water coil 54 in the form of a pin tube are installed in order on the one side wall 50a And the cold outside air passes through the white smoke reducing air distributor 5, And the cooling water is firstly cooled while passing through the hot water coil 54 of the air distributor 5. The cool air that has been subjected to the heat exchange is dried by the air distribution element 50, The cooling air is introduced into the filled space 31 of the exhaust part 3 of the cooling tower A by a plurality of air flow guide plates 512 fixed to the inclined surface 511 of the inclined pipe 51 through the inclined pipe 51 of the cooling tower A. The structure is such that the middle-temperature dry air is mixed so as to approach the hot and humid air (a1) passing through the wet heat exchanging section (2) and the state amount in which no white smoke is generated, 5, when the air distributor of the above-mentioned patent is installed only on one side, as shown in FIG. 5, in the case of the middle-temperature dry air introduced into the air distributor 5 in the patent, The outside air a2 shown in a phase changed blue color is not mixed evenly with the hot and humid air a1 shown in a red color which is sufficiently raised from the lower part and the outside air a2 is left mixed with the hot and humid air a1 to the right Since the outside air a2 is prevented from entering the other end of the air distribution element 50 farthest from the air distribution element 50, There is a fatal problem in that it can not be effectively mixed with one air (a1).

Korean Patent No. 10-0881163

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide an air- Since the dry air which is evenly transferred to the inside of the space is mixed evenly with the high temperature and high humidity air which is conveyed in the right angle direction and the vortex is formed, the absolute humidity is remarkably lowered, and even if the mixed air is discharged to the outside, Which is capable of reducing water vapor.

This object of the present invention can be achieved by an air conditioning system comprising an external air inflow portion into which external cold air is introduced and cold air is heat-exchanged with heated cooling water to be discharged in a state of being heated by mid-temperature dry air, And a ventilation space portion provided between the external air inflow portions so that hot and humid air in the space is heated and discharged to the outside, wherein the steam reducing air mixer includes a plurality of The present invention is achieved by an air mixer for reducing steam according to the present invention in which an outer air inflow portion formed to extend a horizontal conveyance passage and a ventilation space portion intersect so that two or more vertical conveyance passages are extended to be conveyed in a vertical direction.

The air mixer for reducing steam according to the present invention includes: an external air inflow part formed by extending a plurality of horizontal conveyance passages horizontally conveyed; a plurality of vertical conveyance passages crossing each other so that two or more vertical conveyance passages are extended in a vertical direction; A plurality of horizontally extending independent horizontal conveyance passages are formed and the height of the horizontal conveyance passage 71 becomes smaller as the height of the horizontal conveyance passage 71 increases from the lower portion to the upper portion, Temperature air which is uniformly transferred to the inside of the mixing space in the cooling tower is uniformly mixed with the high temperature and high humidity air which is conveyed in the perpendicular direction through the horizontal conveyance passage so that the absolute humidity is remarkably lowered, Even when discharged to the outside, there is an excellent effect that the phenomenon of water vapor generation is significantly reduced .

1 is a cross-sectional view schematically showing the construction of a steam reduction cooling tower according to a conventional technique
Figure 2 is a cross-sectional view schematically illustrating the general construction of a conventional wet counterflow tower;
3 is a cross-sectional view schematically showing the structure of an improved conventional water vapor reduction cooling tower
4 is a schematic cross-sectional view of a conventional water vapor reducing air distributor
FIG. 5 is a schematic longitudinal sectional view showing the mixing state of the outside air and the high-temperature and high-humidity air of the conventional air mixer for reducing steam,
6 is a schematic longitudinal sectional view of a cooling tower provided with an air mixer for reducing steam according to the first embodiment of the present invention
7 is an exploded perspective view of the air mixer for reducing steam according to the first embodiment of the present invention.
FIG. 8 is a schematic longitudinal sectional view showing the mixing state of the outside air and the high-temperature and high-humidity air of the air mixer for reducing steam according to the first embodiment of the present invention,
FIG. 9 is a graph showing the relationship between the humidity chart
FIG. 10 is a perspective view of a water vapor reducing air mixer according to a second embodiment of the present invention,

6, the wet air heat exchanger 61 is disposed below the cooling tower T, and the air is exhausted to the upper portion of the cooling tower T, A heating coil 63, a damper 64 and a fan 65 are installed on the left side of the heat exchanging unit 61. However, Thus, the installation position of the heating coil 63, the damper 64, and the fan 65 installed on the left side may be changed or partially deleted.

As shown in FIG. 7, the air mixer for reducing steam A according to the first embodiment of the present invention includes: (7) and a ventilation space part (8) provided between the external air inflow part (7) so that the hot and humid air in the wet heat exchange part is heated and discharged to the outside while the heat exchanged cooling water is dropped into the wet heat exchange part ).

As shown in FIG. 7, the air mixer A for reducing steam according to the first embodiment of the present invention includes six outer air inflow portions 7 And five ventilation space portions 8 formed so as to extend in the vertical direction so as to extend the vertical conveyance passage 81 are provided so as to intersect with each other.

The outer air inflow part 7 is vertically formed with a plurality of horizontal feed paths 71 having different sizes in the vertical direction and the height of the horizontal feed path 71 decreases from the lower part to the upper part, And a horizontal conveyance passage 71 located at a lower portion thereof are formed to have a large height and extend to the entire length formed horizontally.

In the present embodiment, five horizontal transfer paths 71 of the respective external air inflow parts 7 are formed vertically, and the height thereof becomes smaller as it goes from the lower part to the upper part. Therefore, the upper horizontal transfer path 71, The sectional area is made small so that the pressure loss is large and the sectional area of the horizontal conveyance passage 71 is long so that the pressure loss is small so that the horizontal conveyance passage 71 has almost the same amount of air And the horizontal length of the opening of the end of the horizontal transfer path 71 is made equal, thereby uniformly supplying the same amount of heavy dry air to the mixing space t1.

The air mixer A for reducing the steam according to the first embodiment of the present invention is constructed in such a manner that the air a5 and the air space portion 8, which have been passed through the external air inflow portion 7, The high-temperature and high-humidity air (a7) passing through the mixing chamber is mixed in a substantially uniform mass ratio, so that it is mixed more effectively. The height of each of the horizontal conveyance passages 71 is such that the same amount of the mesophilic dry air flows at different heights of the horizontal conveyance passages so that the static pressure inside the cooling tower and the pressure difference equivalent to the static pressure difference between the external air inflow portions 7 are generated desirable.

A conveying fan 72 may be installed on each of the horizontal conveying passages 71 of the external air inlet 7 to improve the conveying efficiency of the heated heavy and dry air and the conveying fan may be installed separately or horizontally One or more fans may be installed at the front or rear of the heating coil.

The ventilation space portion 8 is vertically disposed between the external air inflow portions 7 and the ventilation space portion 8 is formed with a plurality of vertically divided vertical transfer paths 81 . However, since the high temperature and high humidity air (a7) flows out to the upper part of the vertical direction and the air is transported upward, the vertical transfer path 81 may be divided into two or three .

The height of each of the vertical conveying passages 81 is set so as to correspond to the height of the adjacent horizontal conveying passages 71. Accordingly, the vertical conveying passages 81 are formed so as to approach the air inlet of the outside air inlet 7, As shown in Fig.

Therefore, the upper surface (a ') of the air-reducing air mixer (A) including the external air inflow part (7) and the air space part (8) provided between the external air inflow part (7) Since the inclined angle? 1 of the upper surface of the first stage is gradually increased toward the horizontal transport path 71 of the lower portion of the outer air inflow section 7, the inclination angle? is formed to have an inclination angle smaller than the angle? 6.

Hereinafter, the operation of the air mixer (A) for reducing steam according to the present invention having such a configuration will be described in detail.

First, the air mixer A for reducing the steam used in this embodiment is formed into a size of 7 m width, 2 m width and 5 m width, and the conditions of use are an atmospheric temperature of 0 ° C, a relative humidity of 70% and an absolute humidity of 0.003 kg / kg The temperature of the mesophilic dry air is 20 ° C., the relative humidity is 19%, the absolute humidity is 0.003 kg / kg. The temperature of the high temperature and high humidity air passing through the wet heat exchanger is 32 ° C., the relative humidity is 100%, the absolute humidity is 0.029 kg / kg .

In this state, air (a5) is formed by the outside air passing through the heating coil 63, and the air (a5) dried at the middle temperature through the external air inflow portion 7 of the steam reducing air mixer The air a5 which has been dried at the middle temperature is introduced into each horizontal transfer passage 71 divided horizontally of the external air inflow section 7 so as to be divided into the horizontal transfer passages 71 are conveyed to the inside of the cooling tower by substantially the same amount of medium-temperature dry air and mixed with the high-temperature and high-humidity air passed through the wet heat exchanger 61 at an equivalent mass ratio.

The high temperature and high humidity air a7 flows out to the vertical upper portion through the vertically divided vertical conveyance passage 81 through the ventilation space portion 8 of the steam reducing air mixer A, Since the circular blowing fan 62 rotates and sucks the air inside the cooling tower, the flow of the high temperature and high humidity air a7 is concentrated toward the center as it approaches the blowing fan 62 at the discharge opening. The vertical conveyance passage prevents this sagging phenomenon so that even when the hot and humid air (a7) passes through the ventilation space (8) of the air mixer (A), it can maintain an even flow rate, So that they are mixed in a mass ratio.

8A and 8B, the hot air a5 and the hot and humid air a7, which have been introduced through the external air inflow part 7 and the ventilation space part 8 of the steam reducing air mixer A, The horizontal transfer passage 71 at the lower portion of the external air inflow portion 7 is moved in the mixing space t1 inside the cooling tower T while forming a vortex, And the upper horizontal transfer passage 71 is formed to be small so that almost the same amount of middle-temperature dry air a5 is uniformly supplied into the mixing space t1 of the cooling tower T, The vertical transfer path 81 of the space portion 8 prevents the vertical airflow from leaking to the center of the flow path so that substantially the same amount of high temperature and high humidity air a7 is transferred upwardly to the mixing space t1), the vortex is formed and mixed. As shown in Figs. 8 and 9, when the air temperature is 26 deg. C, the absolute humidity is 0.015 kg / cm < 2 >, the humidity is high enough to mix water (a5) Kg and the relative humidity is about 75%, it is discharged to the outside of the cooling tower (T). Thus, the entire process which is mixed with the outside air at 0 ° C and 70% relative humidity is formed below the saturation line, .

9 is a graph of a humidity chart. The X-axis shows the air temperature (° C), the Y-axis shows the absolute humidity (Kg / Kg), and the parabola shows the relative humidity (5).

9, the outside air having a temperature of 0 ° C, a relative humidity of 70% and an absolute humidity of 0.003 kg / kg flows through a heating coil on the upper part of the cooling tower through a part of the heating coil, The air having passed through the heating coil is subjected to heat exchange so that air having a relative humidity of 19% and an absolute humidity of 0.003 kg / kg at a temperature of 20 ° C, which has been dried at a middle temperature, is introduced through the horizontal transfer passage 71, The introduced air passes through the wet heat exchanger and is subjected to latent heat exchange with high temperature cooling water. As a result, air having a relative humidity of 100% at 32 ° C and an absolute humidity of 0.029 kg / kg is passed through the vertical transfer path 81, ), So that air having a relative humidity of 75% and an absolute humidity of 0.015 kg / kg is generated at 26 DEG C, so that it is discharged from the cooling tower at an appropriate humidity level so as not to generate steam.

10, the horizontal air feed passage 71 of each of the external air inflow portions 7 is brought into close contact with the ventilation space portion 8 to perform a folding operation The horizontal conveyance passage 71 of each of the external air inflow portions 7 disappears and only the ventilation space portion 8 is formed so that the airflow resistance is not received and the original capability of the cooling tower is exerted And the like.

The air mixer for reducing steam according to the present invention can be said to be industrially applicable because it can be repeatedly manufactured in the manufacturing industry of a general air mixer.

7. External air inflow part 8. Air space part

Claims

An external air inflow part (7) in which the external air is introduced and the heated cooling water is heat-exchanged and heated by the medium-temperature dry air, and a high-temperature and high-humidity air which is in the wet heat- And a ventilation space (8) provided between the outer air inflow part (7) so as to be heated and flow out to the outside,
The steam reducing air mixer A includes an external air inflow part 7 formed to extend a plurality of horizontal conveying passages 71 to be horizontally conveyed and a plurality of horizontal air conveying passages 71 provided so as to cross each other between the horizontal conveying passages 71 There is provided a ventilation space portion 8 in which a plurality of vertical conveyance passages 81 are formed so as to extend in the vertical direction,
A plurality of horizontal transfer paths (71) of the outer air inflow parts (7) are vertically formed in the outer air inflow part (7), and the plurality of horizontal transfer paths (71) The cross sectional area is made small so that the length of the upper horizontal conveyance passage 71 is short so that the pressure loss is large and the cross sectional area of the horizontal conveyance passage 71 of the bottom is made long so that the pressure loss is small. A plurality of horizontal transfer paths 71 formed to extend to a length of the horizontal transfer path 71 located at an upper portion of the plurality of horizontal transfer paths 71 are formed to have different sizes in the longitudinal direction The horizontal transfer path 71 positioned at the lowermost portion is formed to extend to the entire length of the wet heat exchanger 61 formed long and horizontal,
The height of the horizontal transfer path 71 becomes smaller as it goes from the lower part to the upper part, so that the horizontal transfer path 71 positioned at the lower part is formed to have a larger height,
The upper surface of the steam mixture reducing air mixer A including the external air inflow portion 7 and the ventilation space portion 8 provided between the external air inflow portion 7 is connected to the external air inflow portion 7 is formed to have a gradually increasing inclination angle in the direction of the horizontal conveyance passage 71 at the lower portion of the horizontal conveyance passage 71 so that the same amount of air is uniformly supplied to the respective horizontal conveyance passages 71. [ Mixer.

delete

The method according to claim 1,
Wherein a feed fan (72) is installed on the horizontal feed path (71) of the external air inflow part (7) so as to increase the feed amount of the heated hot and dry air.

delete

The method according to claim 1,
The outside air inflow part 7 and the ventilation space part 8 are arranged such that the outside air inflow part 7 in which the plural horizontal transportation paths 71 are formed to extend in the summer, The outer air inflow portion 7 having the horizontal transfer path 71 disappears and only the ventilation space portion 8 is opened so as to prevent the air flow resistance from being received, Of the air mixer (1).