KR100785650B1 - Large-scale heat exchanger with air cooling type - Google Patents

Abstract

An air cooling type large-scale heat exchanger is provided to transmit heat between cooling water circulating into a cooler and external air indirectly to prevent cooling water from dispersing in an atmosphere, and increase and decrease the number of heat plates in accordance with cooling heat quantity to reduce weight of a heat exchanger. A cooling water inlet pipe(5) is mounted at a left of an upper end of a front of a hermetic heat exchanger(4) located in the center, and a cooling water outlet pipe(6) is mounted at a right of a lower end of the front of the hermetic heat exchanger. An air fan is placed at an upper end of the hermetic heat exchanger for exchanging heat with cooling water supplied into the hermetic heat exchanger through external air sucked through a lower end of the hermetic heat exchanger, to reduce a temperature of cooling water. The hermetic heat exchanger is formed of a plurality of heat plates(12) secured in a casing formed of a front shielding plate, a rear shielding plate, a right shielding plate, and a left shielding plate. Cooling water introduced from the cooling water inlet pipe is branched into the heat plates so that cooling water introduced into one side heat plate moves in a downward diagonal line from the front upper end to be discharged through the cooling water outlet pipe. External air is moved toward an upper part vertically by the air fan in the other side heat plate to exchange heat with cooling water indirectly.

Description

LARGE-SCALE HEAT EXCHANGER WITH AIR COOLING TYPE}

1 is a schematic view showing a conventional cooling tower.

       Figure 2 is a schematic diagram showing an air cooled large heat exchanger of the present invention.

       Figure 3 is a perspective view of the hermetic heat exchanger of the present invention.

       4 is a sectional view of the hermetic heat exchanger of the present invention.

       5 is a schematic view showing a mounting state of the hot plate of the present invention.

<Brief description of symbols for the main parts of the drawings>

1: cooling tower 2: air fan

3: casing 4: hermetic heat exchanger

5: cooling water inlet pipe 6: cooling water outlet pipe

8: front blocking plate

9: rear barrier plate 10: left barrier plate

11: right side blocking plate 12: hot plate

13: Fixing bolt for hot plate 14: Flange

15: Fixing Nut for Hot Plate, 16: Flange Inner League

17: coolant flow path

The present invention relates to an air-cooled large heat exchanger, and more particularly, to a hermetic heat exchanger having two openings for a cooling water inlet and a cooling water outlet, wherein the hermetic heat exchanger uses a plurality of stacked hot plates. Cooling water is supplied to the other side, external air is introduced to the other side, the cooling water temperature is lowered, and the hot plate is fixed by the fixing plate for the hot plate, thereby replacing the conventional frame having excessive weight, thus reducing the weight of the heat exchanger and installing it. There is an effect of reducing the area, to provide an air-cooled large heat exchanger to prevent the evaporation, scattering of cooling tower cooling water.

In general, a cooling tower cools water by evaporation and heat transfer of water due to the wet bulb temperature and the temperature difference of the cooling water by contacting the air with a condensation heat of a refrigerator or an internal combustion engine cooling heat of a generator. It is a kind of heat exchanger and it is used for refrigeration and air conditioning equipment for large scale cooling operation such as thermal power plant, chemical plant or large building.

In addition, the refrigeration and air conditioning cycle is applied to an air conditioner or the like to absorb the heat from the outside or to release the heat to the outside to keep the food fresh, and to keep the indoor environment pleasant by cooling and heating the room. A refrigeration machine such as a condenser, which is a main component of such a conventional air conditioner, has a relatively high temperature working fluid flowing in comparison with other devices, and a refrigerating device that cools the high temperature working fluid is called a cooling tower. The schematic diagram which showed the said cooling tower is shown.

This forms a cooling cycle in which the cooling water is circulated. The cooling water passing through the condenser is sent to the freezer via the cooling tower 1 and then supplied to the condenser again to be used again.

At this time, the cooling tower 1 is in direct contact with the outdoor air in order to use the cooling water used in the condenser of the refrigerator again to cool the cooling water to the temperature required for the condenser.

Here, the cooling water supplied to the condenser after passing through the freezer is about 32 ° C., and the cooling water exited after being used in the condenser is about 37.4 ° C. and is supplied to the cooling tower 1. As a result, the cooling tower 1 has a function of cooling the cooling water of about 37.4 ° C. that has passed through the condenser to the cooling water of about 32 ° C. so that it can be used again in the condenser.

Therefore, the cooling water having a temperature of 32 to 37.4 ℃ is always present inside the cooling tower 1, the cooling tower containing the cooling water is a variety of microorganisms, algae and bacteria by the temperature of the cooling water, thereby Contamination has caused the development and breeding of various pathogens, and in particular, it has been found to be a major breeding ground for Legionella bacteria that can cause fatal damage to human life.

Here, the Legionella is a gram negative bacillus that is resistant or resistant and grows mainly at a temperature of 20 to 47 ° C., and 35 to 37 ° C. is an optimal growth temperature, but the temperature inside the cooling tower 2 is an optimal growth condition. Able to know. These Legionella bacteria can survive at temperatures below 4 ° C or above 65 ° C and spread to the human body when maintained at an appropriate concentration, causing diseases such as fever and long-term respiratory disorders and diarrhea. After an incubation period, the disease begins with flu symptoms involving headache, high fever, muscle pain, and chest pain, progresses to pneumonia symptoms, and then rapidly deteriorates.

As described above, in the case of the conventional cooling tower, the contamination of the cooling water is always present, and when the cooling water is exposed to the air and scattered, it causes a respiratory failure that is fatal to the weak elderly and children who are weak in adjacent places.

In addition, the conventional cooling tower has a large installation space, including the excessive weight due to this, and when installed on the roof of a building, there is a disadvantage that a problem occurs in the safety of the building.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and includes a sealed heat exchanger having two openings for a cooling water inlet and a cooling water outlet, and the sealed heat exchanger supplies cooling water to one side by using a plurality of stacked hot plates. On the other side, the outside air flows in, the cooling water temperature is lowered, and the hot plate is fixed by the fixing plate for the hot plate, thereby replacing the conventional frame having excessive weight, thereby reducing the weight of the heat exchanger and reducing the installation area. There is, to provide an air-cooled large heat exchanger to prevent the evaporation, splashing of the cooling tower cooling water.

Figure 2 is a schematic view showing an air-cooled large heat exchanger of the present invention, Figure 3 is a perspective view showing a sealed heat exchanger of the present invention, Figure 4 is a cross-sectional view showing a sealed heat exchanger of the present invention, Figure 5 is a present invention As a schematic diagram showing the mounting state of the hot plate, it will be described in detail as follows.

In the cooling tower (1), the cooling water inlet pipe (5) is mounted on the upper left side of the front of the hermetic heat exchanger (4) located in the center, and the cooling water outlet at the lower right side of the front of the hermetic heat exchanger (4). The tube 6 is mounted, and the air is sucked from the lower end of the heat exchanger 4 to exchange heat with the temperature of the cooling water supplied to the inside of the heat exchanger 4, thereby reducing the temperature of the cooling water. An air fan 2 is positioned at the top of the type heat exchanger 4.

In order to reduce the high temperature cooling water supplied from the freezer to the required temperature, it provides a structure for mutual heat transfer with the outside air in the atmosphere, but the heat transfer method of the cooling water and the air is made by indirect heat transfer, thereby circulating the cooling water completely with the outside. It is formed in a hermetically sealed type so as to prevent scattering of the cooling water at the source and to prevent the characteristic of the cooling water from contacting the air in the air.

The hermetic heat exchanger (4) is a plurality of plates that are placed inside the casing (3) formed of the front blocking plate (8), the rear blocking plate (9), the right blocking plate (11), the left blocking plate (10). It is to be made of a hot plate 12 of the type, which is intended to increase the heat transfer efficiency by allowing the outside air sucked by the air fan (2) located at the top of the casing (3) to flow limitedly.
The coolant flowing from the coolant inlet pipe 5 is branched to each hot plate 12, and the coolant flows into one of the hot plate 12, and flows in a diagonal direction downward from the top of the front, and is located at the bottom of the front. It is to be discharged through the tube (6).

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At the same time, the outside inlet air flows vertically upwards by the air fan 2 in the inside of the other side heat plate 12 adjacent to the one side heat plate 12 so that the heat is indirectly transferred to the cooling water. To be an alternating type in number; It is done.

In order to fix and mount the plurality of hot plates 12, the cooling water inlet pipe 5 formed on the front and rear blocking plates 8 and the rear blocking plate 9 of the casing 3 in which the stacked plurality of hot plates 12 are placed. ), The flange 14 is mounted at a position corresponding to the outlet pipe 6, the fixing plate 13 for the hot plate is inserted into the flange inner league 16 formed inside the flange 14, and the hot plate is To fix the plurality of hot plates 12 required by the length adjustment by the fixing nut 15; It is done.
Referring to FIG. 2 and described in more detail in comparison with FIG. 4, FIG. 4 is a cross-sectional view of the hermetic heat exchanger, and the heat exchange fixing bolt 13 has a plurality of inner side blocking plates 10. It penetrates through the inside of the cooling water inlet pipe 5 which penetrates the two hot plates 12 in the longitudinal direction.
In addition, the inside of the cooling water outlet pipe 6 penetrating the plurality of hot plates 12 inside the rear blocking plate 9 also shows a state that the fixing plate 13 for the hot plate penetrates in the longitudinal direction.
That is, when the flange 14 is coupled to the front blocking plate 8 and the rear blocking plate 9 in correspondence with the cooling water inlet pipe 5 and the cooling water outlet pipe 6 as shown in FIGS. 4 and 5, Each of the flange inner leagues 16 formed on the flanges 14 has a form in which both ends of the cooling water inlet tube 5 and both ends and the cooling water outlet tube 6 are respectively inserted. Thereafter, the fixing plate 13 for the hot plate is mounted on the flange inner league 16 embedded in both ends of the coolant inlet pipe 5 and the flange inner league 16 embedded in both ends of the coolant outlet pipe 6. After coupling through the front blocking plate 8 to the rear blocking plate 9, by screwing the fixing plate for the hot plate fixing nut 15 to both ends of the fixing plate for the hot plate 13, the user selectively takes the tightening and loosening It is to fix a plurality of hot plate (12).

According to the required cooling capacity of the cooling water, the number of hot plates 12 is determined in proportion thereto, and is formed to adjust the hot plate nuts 15 according to the size of the overall width of the stacked hot plates 12.

The fixing plate 13 for the hot plate inserted into the flange inner league 16 is inserted and mounted inside the cooling water inlet pipe 5 and the outlet pipe 6, the cooling water of the fixing plate 13 for the hot plate It flows inside the cooling water flow path 17 formed in the outer periphery and the inner space of the cooling water inlet pipe 5 and the outlet pipe 6.

As described above, the air-cooled large heat exchanger having two openings according to the present invention Indirect heat transfer between the coolant and the external air circulated to the freezer prevents the coolant from scattering into the atmosphere, thereby protecting the surrounding environment and human health. By increasing and decreasing, it is possible to easily change the capacity of the air conditioning equipment, thereby reducing the volume and weight of the overall heat exchanger, it is possible to increase the cooling efficiency. In addition, it is intended to provide an air-cooled large heat exchanger that reduces the manufacturing process.

Claims (3)

In the cooling tower (1), Cooling water inlet pipe (5) is mounted on the upper front left of the hermetic heat exchanger (4) located in the center, coolant outlet pipe (6) is mounted on the lower right front of the hermetic heat exchanger (4), The upper end of the hermetic heat exchanger (4) to suck the external inlet air from the lower end of the heat exchanger (4) and mutually exchange heat with the temperature of the cooling water supplied to the heat exchanger (4) to reduce the temperature of the cooling water. The air fan (2) The hermetic heat exchanger (4) is a plurality of plate types placed inside the casing (3) formed of the front blocking plate (8), the rear blocking plate (9), the right blocking plate (11), the left blocking plate (10) Made of hotplates 12, Cooling water flowing from the cooling water inlet pipe 5 is branched into each of the hot plates 12, and cooling water flows into the inner side of the hot plate 12, and flows in a downward diagonal direction from the upper front, and is located at the lower front of the cooling water outlet pipe. Through (6) A plurality of alternating types of heat transfer formed in the adjacent other side heating plate 12 such that external inflow air flows vertically in the casing 3 by the air fan 2; Air-cooled large heat exchanger having two openings, characterized in that made. The method of claim 1, A flange at a position corresponding to the cooling water inlet pipe 5 and the outlet pipe 6 formed on the front blocking plate 8 and the rear blocking plate 9 of the casing 3 on which the stacked plurality of hot plates 12 are placed. (14), the fixing plate (13) for hot plate is inserted into the flange inner league (16) formed inside the flange (14), and the length adjustment by the fixing plate (15) for hot plate is necessary. To fix the plurality of hot plates 12; Air-cooled large heat exchanger having two openings, characterized in that made. The method of claim 2, The fixing plate 13 for the hot plate is placed inside the cooling water inlet pipe 5 and the outlet pipe 6 so that the cooling water flows through two openings, characterized in that the cooling water flow path 17 formed in the inner space flows. Having an air cooled large heat exchanger.

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