JPH05164479A - Direct and alternating current type cooling tower - Google Patents

Abstract

PURPOSE:To prevent clogging and enhance a cooling capacity without making in a larger size by laying out a first enclosed type fin tube exchanger under a cooling tower upper part sprinkler device so as to spread water, and a second enclosed type fin tube heater at a position in series with the first enclosed type fin tube exchanger and deviated from the sprinkler device so as to sprinkle service water. CONSTITUTION:A first enclosed type fin tube heater 60B is laid out under a cooling tower's upper part sprinkler device 80 so as to sprinkle water of the sprinkler device 80 from a sprinkler hole 80a. A second enclosed type fin tube exchanger 60A is laid out at a position which is located slightly near an open air intake port 17 and which allows the sprinkle of the upper part sprinkler device 80 to be avoided. The upper part is covered with a top board 10. A service water sprinkler device 90 is installed between the second enclosed type fin tube exchanger 60A and the open air intake port 17 in such a fashion that the service water may be sprinkled over the whole height of the heat exchanger 60A from the front. The heat exchangers 60A and 60B are connected to each other in series by means of a circulation cooling water passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross flow type cooling tower in which a heat exchanger with a closed fin is arranged below a cooling tower upper sprinkler for spraying circulating cooling water.

[0002]

2. Description of the Related Art Various cooling towers of this type have been developed on the market before this application, and one example thereof is described in Japanese Utility Model Laid-Open No. 63-190764.

[0003]

In the heat exchanger with the closed fin in the cooling tower described in the above publication, since the sprayed water is circulated and sprayed to this heat exchanger, the adjacent fins are prevented from clogging. Since the pitch between them is rough or it is a bare tube, the total contact area between the air flow and the fin group can not be large, and in order to increase the heat exchange rate of the cooling tower, the closed fin heat exchanger must be large. I have to. As a result, there is a hindrance when installing on the top of a high-rise building where the installation area is limited. An object of the present invention is to overcome such drawbacks of the prior art and to achieve a desired cooling capacity without causing clogging of a closed fin heat exchanger in the cooling tower and without increasing the size of the cooling tower. It is to provide a cross flow type cooling tower capable of exhibiting the above.

(Means for Solving the Problem) In order to solve the above-mentioned problems, the AC cooling tower of the present invention has a first hermetic seal below the cooling tower upper sprinkler for spraying circulating cooling water. In a state in which the heat exchangers with mold fins are arranged and the second heat exchanger with fins in series connected in series to the first heat exchanger with fins in series avoids the lower side of the upper sprinkler. On the primary side of the air flow of the second closed finned heat exchanger, there is a tap water sprinkler that sprays tap water from the front surface over the entire height of the second closed finned heat exchanger. The lower water tanks for arranging the sprinkled circulating cooling water and tap water together and circulating them to the upper sprinkler unit are the first and second
It is characterized in that it is arranged below the closed type heat exchanger with fins. In order to solve the above problems, the tap water sprinkler in the AC cooling tower of the present invention is
And a main pipe having a vertical main pipe portion arranged along the height direction of the heat exchanger with closed fins, and the tap water discharge port thereof faces the front direction of the second heat exchanger with closed fins. Preferably, the water spray nozzle comprises a plurality of water spray nozzles provided at intervals in the axial direction of the part.

In order to solve the above problems, the first heat exchanger with fins in the AC cooling tower of the present invention is located downstream of the second heat exchanger with fins in the air flow direction. It is desirable that an eliminator for preventing water droplets is arranged on the secondary side of the air flow of each heat exchanger with fins arranged in the above. In order to solve the above-mentioned subject, the above-mentioned upper sprinkler in the alternating current type cooling tower of this invention may be an upper water tank which has many sprinkling holes in a bottom face. In order to solve the above-mentioned problems, in the alternating current type cooling tower of the present invention, the first closed type heat exchanger with fins and the second heat exchanger connected in series are provided.
The supply unit and the discharge unit in the closed heat exchanger unit consisting of the closed fin heat exchanger are detachably connected to the supply header or the discharge header, and each closed fin heat exchanger is a cooling tower machine frame. The first end of the first heat exchanger with fins and the second end of the heat exchanger with fins are connected to each other in series in a detachable manner. The crossflow cooling tower according to claim 1, wherein the cooling tower is connected. In order to solve the above problems, the pitch dimension between the fins in the first heat exchanger with fins in the AC cooling tower of the present invention is the pitch between the fins in the second heat exchanger with fins. It is preferably rougher than the dimensions.

[0006]

The operation of the invention described in claim 1 configured as described above will be described below. In the summer, spray water is sprayed from the cooling tower upper sprinkler onto the first heat exchanger with fins. Further, tap water is sprinkled from the tap water sprinkler on the front surface of the second heat exchanger with fins. While this sprayed water and tap water are flowing down on the corresponding heat exchanger with fins, they are attached to each fin to form a water film, which is cooled by contact with the horizontally flowing air flow and evaporation, and the heat exchanger. The circulating cooling water flowing inside is indirectly cooled. At this time, tap water also helps improve the quality of circulating spray water. In the winter, the spraying of water and tap water is stopped, and indirect heat exchange is performed between the air flow and the brine liquid circulating in the first and second heat exchangers with closed fins, so that the brine Humidify the liquid. That is,
The invention may also be used as a heating tower.

Next, in the invention described in claim 2, in addition to the operation of the invention of claim 1, the tap water supplied to the main pipe portion is atomized from each water spray nozzle to the second position.
Water is evenly sprayed on the front surface of the heat exchanger with closed fins. According to the invention of claim 3, in addition to the operation of the invention of claim 1, in the winter, in order to prevent the generation of white smoke, tap water is supplied to the second closed heat exchanger with fins. The water is sprayed down, and the sprayed water is not sprayed on the first heat exchanger with fins close to the exhaust port. Therefore, the air immediately after being taken in from the outside air intake port comes into direct contact with the tap water, cools the tap water by the latent heat effect of vaporization, and heats itself slightly, so that the inside of the second heat exchanger with fins is cooled. pass. Then, in the first heat exchanger with the closed fins, which has not been sprayed with the sprayed water, the state in which the temperature is still high, which is sent from the load section through the supply header into the first closed fins or the heat exchanger. The circulating cooling water and the air whose temperature is indirectly raised contact with each other and are heated. Due to this heating, the temperature of the air becomes high and the relative humidity thereof is lowered, and the air is sucked toward the exhaust port, and is not discharged into supersaturated air, that is, is not exhausted into white smoke and is exhausted to the atmosphere. Further, since the eliminator is provided, during the winter operation, tap water sprinkled on the second heat exchanger with fins is sprayed onto the surface of the second heat exchanger with fins and scattered from the outside air intake port. The eliminator catches water droplets that are trying to flow to the exhaust port side by riding on the sucked air flow, and in the first heat exchanger with fins, water droplets do not adhere to the outer peripheral surface thereof and the temperature of the air is raised. .. The invention described in claim 4 operates in the same manner as the invention described in claim 1. At this time, the sprayed water is evenly sprayed on the first closed type heat exchanger with fins through a large number of spray holes provided on the bottom surface of the upper water tank.

Next, in the invention described in claim 5, in addition to the same operation as the invention described in claim 3, the cooling tower is further cleaned due to periodic cleaning of the cooling tower and damage to the sealed heat exchanger. When removing this heat exchanger from the main unit,
The common supply header, discharge header and the supply and discharge parts of the heat exchanger are disconnected. Then, the entire heat exchanger is moved inwardly with respect to the cooling tower frame in the longitudinal axis direction of the tube spacer, that is, immediately below the exhaust port, and first the first heat exchanger with closed fins is pulled out from the cooling tower frame. .. Then
Remove the joint connecting the first and second sealed finned heat exchangers. In this state, the first heat exchanger with closed fins is laterally displaced with respect to the second heat exchanger with closed fins, separated, and taken out. Next, if it is necessary to repair the second heat exchanger with closed fins, remove the eliminator, pull out the second heat exchanger with closed fins inward to the cooling tower machine frame, remove it from the body, and attach it. Remove dust, sand, etc., and repair the damage, or replace the new heat exchanger with the first and second sealed fins. In the invention described in claim 6, in addition to the operation of the invention described in claim 1, since the pitch dimension between the fins in the first heat exchanger with fins is rough, the spray water is slime or the like. The tap water that flows smoothly without being generated and is sprayed in the form of mist is sprayed between the fins having narrow pinches in the second closed heat exchanger with fins.

[0009]

EXAMPLES Next, typical examples of the invention described in claims 1 to 6 will be described. In FIG. 1, A is a cross flow type cooling tower, and in this cooling tower A, a closed heat exchanger B
A plurality of them are arranged substantially horizontally and arranged in a hierarchical structure in the upper and lower layers, and the supply section and the discharge section of each hermetic heat exchanger B are detachably connected to the corresponding common supply header 15 or discharge header 16, respectively. The discharge header 16 is located near the outside air intake 17 of the cooling tower A, and the supply header 15 is located near the exhaust port 19 of the cooling tower A. Each hermetic heat exchanger B is composed of one cooling coil 60, and the cooling coil 60 is attachable / detachable to / from one end of a plurality of second finned tubes 60a and one end of a first finned tube 60b which are parallel to each other. Are connected in series with a union joint 60c. The U-shaped curved pipes 62 located on both sides, which connect the ends of the straight pipes 61 of the second finned pipe 60a and the first finned pipe 60b and form the cooled passage that meanders in a zigzag shape, , The second finned pipe 60a and the first finned pipe 60b are supported by a pair of left and right separate pipe spacers C ₁ and C ₂ into which the straight pipe 61 group is fitted. The connection position of the union joint 60c is one pipe spacer C for supporting the second finned pipe 60a.
_This is an intermediate position where ₂ and one tube spacer C ₁ for supporting the finned tube 60b face each other.

Further, the ends of the other tube spacer C ₂ for supporting the second finned tube 60a and the other tube spacer C ₁ for supporting the first finned tube 60b extend toward each other. Existing, these extending and approaching said tube spacers C ₁ ,
The ends of C ₂ are detachably connected by a connector 70 such as a pin. This connecting side is opposite to the union joint 60c. As an example of the connecting tool 70, an elastic synthetic resin socket 71,
The socket 71 is made of a synthetic resin insert pin 72 having elasticity so that it can be fitted and removed freely (see FIGS. 2 and 4). Each of the pipe spacers C ₁ and C ₂ is made of an elongated material made of vinyl chloride and has a U-shaped cross section, and each spacer C ₁ is placed at a position to cover all the joints of the straight pipe 61 and the curved pipe 62 located at the left and right ends. , C ₂ are set. The spacers C ₁ and C ₂ are arranged so that they can be drawn out and replaced with respect to a spacer receiving member 63 described later. On the inner surfaces of the pair of left and right cooling tower support frames D, which face each other, spacer receiving members 63 made up of a number of channel members having a U-shaped cross section corresponding to the number of the cooling coils 60 are integrally arranged at hierarchical intervals. The spacer receiving members 63 are fixed and are arranged substantially horizontally in the width direction of each support frame D. The pair of left and right spacers C ₁ and C _{2 of} each cooling coil 60 are inserted and supported in the respective spacer receiving members 63 of the pair of support frames D common to the left and right from the longitudinal direction thereof, and each cooling coil 6
The straight pipes 61 and the curved pipes 62 of 0 do not directly contact the support frame D, and a predetermined number of cooling coils 60 are vertically parallel to each other and are arranged between the pair of left and right cooling tower support frames D by the spacer C ₁ , C ₂ are erected and supported (see FIGS. 3 and 4). At this time, the primary side end 64 of the first finned pipe 60b in all the cooling coils 60 of each stage is on the blower 65 side of the cooling tower A, and the secondary side end 66 of the second finned pipe 60a is It is located on the outside air intake 17 side and is connected to a common vertical supply and discharge header 15 and 16 by a union joint (not shown).

Further, the cooling coils 60 of the same shape arranged hierarchically are arranged in the vertical direction, and the cooling coils 60 are arranged in the middle of the second finned pipe 60a and the first finned pipe 60b. Is provided with an eliminator 69 vertically in the vertical direction. The first finned pipe 6 in the closed heat exchange section B of each stage located on the exhaust port 19 side
0b, an upper sprinkler 80 for sprinkling spray water is provided on the first heat exchanger 60B with fins, which is composed of the first tubes 60b with fins in each stage. This upper sprinkler 80 has a sprinkler hole 80 on the bottom.
It is an upper water tank having many a. Second-stage hermetically sealed heat exchanger 6 with fins located near the outside air intake 17
The upper part of the heat exchanger 60A with the second closed fins consisting of 0a is covered with the top plate 10 of the cooling tower A, and between the second heat exchanger 60A with the closed fins and the outside air intake 17, A water supply water sprinkler 90 for watering water from the front surface of the second closed finned heat exchanger 60A is disposed over the entire height thereof. This tap water sprinkler 90 has a vertical main piping portion 91 that is piped along the height direction of the second heat exchanger 60A with a closed fin, and its tap water discharge port 92a has a second closed fin. It is composed of a plurality of water spray nozzles 92 which are provided at intervals in the axial direction of the main piping portion 91 facing the front surface of the heat exchanger 60A. Further, the heat exchanger 60B with the first closed fin
The pitch dimension between the fins Fb in is smaller than the pitch dimension on the fin Fa side in the second closed heat exchanger with fins 60A (see FIG. 2). The first and second
The arrangement of the closed type heat exchangers 60A and 60B with fins is reversed, and correspondingly, the upper sprinkler 80
Also in the aspect in which the arrangement of the tap water sprinkler 90 is changed, the present invention is the same, and instead of the upper water tank 80,
Sometimes a horizontal watering pipe is used. Since the operation of the above-described embodiment is the same as the operation of the invention of the corresponding claim, the description thereof is omitted here.

[0012]

According to the invention described in claim 1,
In the summer, spray water is sprinkled from the cooling tower upper sprinkler onto the first heat exchanger with fins, and the front tap water sprinkler is provided on the front surface of the second heat exchanger with fins. The tap water can be sprinkled from there, and the clogging can be prevented without the generation of slime slurry. The sprayed water and tap water are attached to each fin while flowing down on the corresponding heat exchanger with fins to form a water film, which is cooled by contact with a horizontally flowing air stream to evaporate and cool the heat exchanger. The circulating cooling water flowing inside can be cooled indirectly. The quality of the sprayed water that circulates can be improved by this tap water. In winter, stop spraying the water and tap water, and
The brine solution can be humidified by performing indirect heat exchange with the brine solution circulating in the second heat exchanger with closed fins. Next, in the invention described in claim 2, in addition to the operation of the invention of claim 1, the tap water supplied to the main pipe portion is atomized from each water spray nozzle to the second closed type. Water can be sprayed evenly on the front of the heat exchanger with fins.

According to a third aspect of the present invention, the first aspect
In addition to the action of the invention of the first aspect, in winter, in order to prevent the generation of white smoke, tap water is sprinkled down to the second heat exchanger with fins, and the first air-closed type close to the exhaust port. Since the sprayed water is not sprayed on the finned heat exchanger, the air immediately after being taken in from the outside air intake is brought into direct contact with the tap water, and the tap water is cooled by the latent heat of vaporization, and the temperature rises slightly. , In the second closed heat exchanger with fins. Then, in the first heat exchanger with the closed fins, which has not been sprayed with the sprayed water, the state in which the temperature is still high, which is sent from the load section through the supply header into the first closed fins or the heat exchanger. It is possible to heat the circulating cooling water in the air and the air whose temperature has been raised indirectly, and this heating raises the temperature of this air to a high temperature and sucks it toward the exhaust port while keeping its relative humidity low. It can be exhausted to the atmosphere without being converted into white smoke. Further, in the invention described in claim 2, since the eliminator is provided, during the winter operation, the tap water sprayed on the second heat exchanger with fins is supplied to the second heat exchanger with fins. The eliminator can catch water droplets that collide and scatter on the surface and ride on the air flow sucked from the outside air inlet and flow toward the exhaust outlet side. In the first heat exchanger with fins, water droplets are formed on the outer peripheral surface. The temperature of the air can be raised without adhering. According to the invention described in claim 4, it is possible to obtain the same effect as that of the invention described in claim 1. At this time, the spray water can be evenly sprayed on the first heat exchanger with fins through the numerous spray holes provided on the bottom surface of the upper water tank.

Next, in the invention described in claim 5, the same effect as that of the invention described in claim 3 is obtained, and the cooling tower is regularly cleaned and the sealed heat exchanger is damaged due to damages and the like. When taking out this heat exchanger from the main body, disconnect the common supply header, discharge header, supply part and discharge part of the heat exchanger from each other, and remove the entire heat exchanger in the longitudinal axis direction of the tube spacer. Moving to the inside of the machine frame, that is, just below the exhaust port, first the first heat exchanger with fins is pulled out from the cooling tower machine frame. Then the first
And the second heat exchanger with closed fins are removed from the joint, and in this state, the first heat exchanger with closed fins is placed laterally with respect to the second heat exchanger with closed fins. If it is necessary to repair the second closed heat exchanger with fins after separating and taking it out, remove the eliminator and similarly put the second closed heat exchanger with fins inward as a cooling tower frame. Remove it to the outside of the drawer body to remove dust and sand adhering to it and repair damage,
It is possible to replace the heat exchanger with a closed fin. . In the invention described in claim 6, claim 1
In addition to the effects of the invention described in 1), since the pitch dimension between fins in the first heat exchanger with fins is rough, sprayed water can be smoothly flowed down without generation of slime, etc. The tap water to be sprayed can be sprayed between the fins having narrow pinches in the second closed finned heat exchanger.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an example.

FIG. 2 is a plan view of the sealed heat exchange unit of FIG.

FIG. 3 is a diagram showing a configuration of a cooling coil of FIG.

FIG. 4 is a plan view showing a connecting portion between a first fin pipe and a second fin pipe.

FIG. 5 is a side view showing a relationship between a second fin tube and a tube spacer.

FIG. 6 is a side view showing a relationship between a first fin tube and a tube spacer.

FIG. 7 is a cross-sectional view showing an example of a connecting tool.

[Explanation of symbols]

 60A Second closed fin heat exchanger 60B First closed fin heat exchanger

Claims (6)

[Claims] 1. A first sealed finned heat exchanger is arranged below a cooling tower upper sprinkler for spraying sprayed water, and the first sealed finned heat exchanger is further arranged in the first sealed finned heat exchanger. A second closed-type finned heat exchanger in which circulating cooling water flow paths are connected in series is arranged so as to avoid the lower side of the upper sprinkler, and the air flow of the second closed-type finned heat exchanger is reduced. On the primary side, there is a tap water sprinkler that sprinkles tap water from the front surface over the entire height of the second heat exchanger with closed fins. The sprinkled water and tap water are both temporarily suspended. A cross-flow cooling tower, characterized in that a lower water tank for accumulating and circulating it to the upper sprinkler unit is arranged below the first and second heat exchangers with closed fins. 2. The tap water sprinkler comprises a vertical main pipe section arranged along the height direction of a second heat exchanger with fins, and a tap fin whose water tap discharge port is second. The cross-flow cooling tower according to claim 1, comprising a plurality of sprinkler nozzles provided at intervals in the axial direction of the main pipe portion facing the front surface of the attached heat exchanger. .. 3. The first heat exchanger with closed fins is arranged downstream of the second heat exchanger with closed fins in the air flow direction and is arranged in the air flow of each heat exchanger with closed fins. The cross flow type cooling tower according to claim 1, wherein an eliminator for preventing water droplets is arranged on the secondary side of the. 4. The cross-flow cooling tower according to claim 1, wherein the upper water sprinkler comprises an upper water tank having a large number of water spray holes on the bottom surface. 5. A supply unit for supplying internal circulating cooling water (liquid) in a closed heat exchange unit comprising a first closed fin heat exchanger and a second closed fin heat exchanger unit connected in series. And, the discharge part is detachably connected to the supply header or the discharge header, and each heat exchanger with a finned type heat exchanger is arranged so that it can be drawn out and replaced with respect to the cooling tower machine frame.
The first end of the first heat exchanger with fins and the second fin and the end of the fin-equipped heat exchanger with fins are detachably connected in series by a joint. The cross-flow cooling tower described in 3. 6. The pitch dimension between the fins in the first closed fin heat exchanger is made rougher than the pitch dimension between the fins in the second closed fin heat exchanger. The cross-flow cooling tower according to claim 1.