JP4529914B2 - Waste collection device for cooling tower - Google Patents

Description

  The present invention relates to a dust collection device provided inside a cooling tower.

A cooling tower is installed on the roof of the building in order to cool equipment in each part of the building (see Patent Document 1). The cooling water sent out from the cooling tower cools equipment that generates heat in each part of the building. The cooling water heated by absorbing heat from the equipment is returned to the cooling tower, radiated to the outside air by the cooling tower, cooled, and then sent out again to each part of the building.
Japanese Patent No. 3690650

  In the cooling tower, silica exfoliation solidified on the surface of piping such as cooling water, rust exfoliation generated on the surface of piping and the like, pieces of filler inside the cooling tower, scale, and the like are accumulated as dust. Inside the water tank of the cooling tower, in front of the opening serving as the outlet of the cooling water, a metal mesh strainer for collecting garbage is fixed, and the metal mesh strainer removes dust such as scale and sludge from the cooling water. . When the cooling tower is used for a long time, the wire mesh strainer is clogged with dust, so it is necessary to periodically remove the dust accumulated in the wire mesh.

  However, when removing the dust from the wire mesh strainer with the cooling water stored inside the cooling tower water tank, the dust away from the wire mesh strainer diffuses and floats in the water tank, and therefore adheres to the wire mesh strainer. The garbage cannot be removed completely. In addition, dust floating in the water tank may flow out from the cooling water outlet to the piping.

  In order to prevent such problems, the cooling water is drained from the water tank of the cooling tower when removing dust from the wire mesh strainer. However, in order to extract the cooling water from the water tank of the cooling tower, it is necessary to simultaneously extract the cooling water from the pipes extended to each part of the building. Therefore, every time the cooling tower is cleaned, a huge amount of cooling water is wasted, which is extremely uneconomical.

  Therefore, an object of the present invention is to provide a dust collection device for a cooling tower that can easily remove dust contained in cooling water without wasting the cooling water.

  In order to achieve the above-described object, the present invention is a garbage collection device that can be placed in a water tank of a cooling tower, and is erected from the bottom surface of the water tank so as to surround the cooling water outlet, and has a large number of penetrations on the plate surface. A substantially plate-shaped dust stopper with a hole formed therein, and a substantially plate-shaped dust receiver extending along the bottom surface of the water tank from the vicinity of the lower end of the dust stopper toward the upstream side of the cooling water flow. It is characterized by providing.

  According to this garbage collection device, silica debris, rust exfoliation, filler debris, scales, and other debris flow along the bottom of the aquarium with cooling water in the cooling tower water tank. Dust larger than the through hole of the part is stopped by the dust stopper. Then, the dust stopped by the dust stopper is accumulated on the plate surface of the dust receiver below the dust stopper. The cleaning operator of the cooling tower can collect the dust on the plate surface of the dust receiving portion by taking up the dust collecting device from the water tank, and can easily clean the cooling tower.

  In the above-described cooling tower dust collection device, the dust receiving portion may include an inclined portion that is inclined upward toward the dust stopper, and a groove provided between the inclined portion and the dust stopper. preferable. According to this configuration, the dust that has flowed along the bottom surface of the water tank and reached the dust receiving portion climbs the inclined portion of the dust receiving portion by the flow of cooling water, and is provided between the inclined portion and the dust stopper. Enter the groove. The dust that has entered the groove portion does not flow out of the groove portion due to a local water flow generated in the groove portion, but is captured by the groove portion. Therefore, the dust in the water tank can be more reliably collected by the inclined portion and the groove portion of the dust receiving portion.

  In the above-described cooling tower dust collection device, the inclination of the inclined portion is preferably 6 ° to 10 ° with respect to the bottom surface of the water tank. According to this structure, since the angle of the inclination of the inclined portion is set to 10 ° or less with respect to the bottom surface of the water tank, the dust in the water tank can be raised along the inclined portion by the flow of the cooling water. Further, since the angle of the inclination of the inclined portion is 6 ° or more, even if the length of the inclined portion is relatively short, the step between the groove portion and the inclined portion can be made sufficiently large, It is possible to prevent the dust that has entered the groove from flowing out of the groove by generating a natural water flow. In addition, it is more preferable that the inclination angle of the inclined portion is 7 ° to 9 ° with respect to the bottom surface of the water tank, and it is optimal that the angle is 8 ° with respect to the bottom surface of the water tank.

  In the above-described cooling tower dust recovery apparatus, the height of the top of the inclined portion is preferably 10 mm or more with reference to the groove. According to this configuration, since the height of the top portion of the inclined portion is set to 10 mm or more with reference to the groove portion, the step between the groove portion and the inclined portion can be sufficiently increased, and a local water flow is generated in the groove portion. It is possible to prevent dust that has entered the groove from flowing out of the groove.

  In the above-described cooling tower dust recovery apparatus, the upper end of the dust stopper is preferably lower than the water level of the water tank. According to this configuration, even if dust adheres to almost the entire area of the plate surface of the dust stopper and the through hole of the dust stopper is clogged, the upper end of the dust stopper is lower than the water level of the water tank. The water flows above the dust stopper and reaches the cooling water outlet. Therefore, even when the through hole of the dust stopper is clogged, a sufficient flow rate of the cooling water can be ensured.

  The above-described cooling tower dust collection device is preferably configured to be divided into a plurality of pieces. According to this configuration, since the garbage collection device is configured to be divided into a plurality of pieces, the garbage collection device divided into a plurality of pieces can be provided even in a situation where piping in the cooling tower becomes an obstacle to the installation of the garbage collection device. By combining at the installation position, the garbage collection device can be easily installed.

  According to the cooling tower dust recovery apparatus of the present invention, it is possible to easily remove the dust contained in the cooling water without wasting the cooling water.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of a cooling tower dust recovery apparatus according to the invention will be described with reference to the drawings.

  FIG. 1 shows a building 10 in which a cooling tower 20 is installed on the roof. Each floor of the building 10 is provided with devices that generate heat, such as air conditioners 14A, 14B, 14C, 14D, and 14E. From the cooling tower 20 to each of the air conditioners 14A to 14E, a pipe 12A that serves as a forward path for cooling water extends. It is installed. When the cooling water is sent to each of the air conditioners 14A to 14E via the piping 12A as the outward path, the cooling water absorbs the heat released from the condenser of each of the air conditioners 14A to 14E and cools the condenser. On the other hand, a pipe 12B serving as a return path for cooling water is extended from each air conditioner 14A to 14E to the cooling tower 20, and the cooling water heated by the heat of the condenser is sent to the cooling tower 20 via the pipe 12B.

  Further, water pumps 16A and 16B are provided on the first floor of the building 10, and when the water pumps 16A and 16B are operated, the water pressure in the pipe 12B serving as the return path is increased, and the cooling water is cooled by the cooling tower 20. Pushed up. A small strainer 18A, 18B is provided in front of the water pumps 16A, 16B in the pipe 12A that is the outgoing path of the cooling water, so that dust in the pipe 12A is prevented from flowing into the water pumps 16A, 16B. Yes. In the above description, the condensers of the air conditioners 14A to 14E are cooled by the cooling water. However, the devices cooled by the cooling water are not limited to the air conditioners 14A to 14E, and other types of heat generating devices are used. It may be cooled.

  The structure of the cooling tower 20 will be described. A pipe 12 </ b> B serving as a return path for cooling water is connected to the upper part of the cooling tower 20, and the cooling water heated at each part of the building 10 is supplied into the cooling tower 20. A central portion of the cooling tower 20 is hollow, and a plurality of fillers (heat exchanging portions) 24, which are plastic thin plates, are stacked on the side of the cooling tower 20 surrounding the hollow with a slight gap. Yes. When the cooling water sent to the cooling tower 20 via the pipe 12B is uniformly supplied to the fillers 24, the cooling water flows down on the plate surfaces extending below the fillers 24, and exchanges heat with the outside air. And release heat. A blower fan 22 is disposed in the upper part of the cooling tower 20, and a flow is generated in the outside air around the filler 24 by driving the blower fan 22, and heat exchange between the outside air and the cooling water is promoted.

  FIG. 2 schematically shows the inside of the lower portion of the cooling tower 20 as viewed from the side. In the lower part of the cooling tower 20, a water tank 26 for storing cooling water that has flowed down from the filler 24 is provided. The water tank 26 includes a side surface 26 a disposed so as to surround the filler 24, an intermediate surface 26 b disposed mainly below the filler 24, and a bottom surface 26 c disposed mainly below the cavity 34. Has been. Here, the surface 26b mainly disposed below the filler 24 is called an “intermediate surface” for convenience of explanation, but the intermediate surface 26b constitutes a part of the bottom surface of the water tank 26. is there. As described above, when viewed from above, the cavity 34 is located in the center of the cooling tower 20, and the filler 24 is located so as to surround the cavity 34. Similarly, when viewed from above, the bottom surface 26c is located in the center of the cooling tower 20, and the intermediate surface 26b is located on the side of the cooling tower 20 so as to surround the bottom surface 26c.

  Since the bottom surface 26c is recessed downward with respect to the intermediate surface 26b, the cooling water that has flowed down from the filler 24 to the intermediate surface 26b further flows into the bottom surface 26c. That is, in the water tank 26, the bottom surface 26c and the surrounding area are water collecting portions 30 for collecting cooling water. An opening serving as an outlet for cooling water is formed in the vicinity of the bottom of the water collecting section 30, and a pipe 12 </ b> A serving as an outgoing path for cooling water is connected to the opening. Inside the water collection unit 30, a wire net type strainer 28 for collecting dust is installed so as to isolate the cooling water outlet. The mesh of the wire mesh strainer 28 is a substantially square with sides of approximately 2 mm to 3 mm. When the cooling water that has flowed down from the filler 24 flows into the water collecting section 30, it always passes through the mesh of the wire mesh strainer 28 before reaching the pipe 12A, so that the cooling water of 2 mm to 3 mm or more contained in the cooling water. Large-sized dust is removed by a wire mesh strainer 28. In addition, a water level adjusting pipe 32 is provided inside the water tank 26, and when the water level of the cooling water exceeds the upper end of the water level adjusting pipe 32, the cooling water is discharged to the outside of the cooling tower 20 through the water level adjusting pipe 32. It has come to be.

  In addition, a dust collection device 40 is placed on the intermediate surface 26 b of the water tank 26 so as to surround the edge of the water collection unit 30. The appearance of the dust collection device 40 is shown in FIG. When viewed from above, the water collection unit 30 has a substantially square shape with a side of about 900 mm. Therefore, the dust collection device 40 has a substantially square shape with a side of about 1000 mm to surround the water collection unit 30. The garbage collection device 40 includes a substantially plate-shaped dust stopper 42 erected from the intermediate surface 26 b of the water tank 26, and a substantially plate-shaped dust extending along the intermediate surface 26 b of the water tank 26 from near the lower end of the dust stopper 42. Receiving portion 44. The dust stopper 42 is formed by bending a steel plate-like punching metal, and a large number of circular through holes having a diameter of about 2 mm to 3 mm are formed on the plate surface. On the other hand, the dust receiving portion 44 is formed by bending an aluminum plate material into a desired shape, and then joining each part by a joining method such as screwing or welding. The dust receiving portion 44 extends on the intermediate surface 26b toward the upstream side of the flow of the cooling water, in other words, extends toward the opposite side of the cooling water outlet. The dust collection device 40 is merely placed on the intermediate surface 26b of the water tank 26 as it is, and is not fixed to the intermediate surface 26b. In the garbage collection device 40, since the cooling water flows uniformly from the four directions, the dust collection device 40 is not moved by the flow of the cooling water even if it is not fixed to the intermediate surface 26b. As described above, the dust collection device 40 has a simple structure and is easy to install, so that the cost can be reduced.

  According to the configuration of the dust collecting device 40 described above, in the water tank 26 of the cooling tower 20, dust such as silica exfoliation, rust exfoliation, filler fragments, scales, etc. is moved along the bottom surface of the water tank 26 by cooling water. However, dust larger than the through hole of the dust stopper 42 is stopped by the dust stopper 42. The dust stopped by the dust stopper 42 is accumulated on the plate surface of the dust receiver 44 below the dust stopper 42. The cleaning operator of the cooling tower 20 can collect the dust on the plate surface of the dust receiving portion 44 by taking up the dust collecting device 40 from the water tank 26, and can easily clean the cooling tower 20. it can.

  By collecting garbage using the garbage collection device 40 in this way, the frequency with which the wire mesh strainer 28 is clogged can be greatly reduced. Thus, for example, conventionally, it was necessary to clean the wire mesh strainer 28 about once a month. However, the wire mesh strainer 28 is cleaned about once a year by collecting garbage using the above-described dust collecting device 40. Only by doing this, clogging of the wire mesh strainer 28 can be avoided. Further, along with the cleaning of the wire mesh strainer 28, about 1 to 10 tons of cooling water inside the cooling tower 20 and the pipes 12A and 12B will be discarded, but the cleaning frequency of the wire mesh strainer 28 will be reduced. Therefore, waste of cooling water can be avoided, which is preferable from the viewpoint of cost and environment.

  The function of the dust collection device 40 will be described in more detail. FIG. 4 shows an enlarged cross section of the region R in FIG. As shown in FIG. 4, in the garbage collection device 40, the dust receiving part 44 includes an inclined part 44 a that is inclined toward the dust stopper 42, and between the inclined part 44 a and the dust stopper 42. Provided with a groove 44b. According to this configuration, the dusts S1, S2, and S3 that have flowed along the intermediate surface 26b of the water tank 26 and reached the dust receiving portion 44 climb the inclined portion 44a of the dust receiving portion 44 by the flow of the cooling water, and are inclined. The groove 44b is provided between the portion 44a and the dust stopper 42. The dust S4 that has entered the groove 44b does not flow out of the groove 44b due to a local vortex generated by the step between the inclined portion 44a and the groove 44b, but is captured by the groove 44b. Accordingly, the dust S1 to S4 in the water tank 26 can be more reliably collected by the inclined portion 44a and the groove 44b of the dust receiving portion 44.

  In the inclined portion 44 a described above, the angle θ of the climbing gradient of the inclined portion 44 a is 6 ° to 10 ° with respect to the intermediate surface 26 b of the water tank 26. According to this configuration, since the angle θ of the climbing slope of the inclined portion 44a is set to 10 ° or less with respect to the intermediate surface 26b of the water tank 26, the dust S1 to S3 in the water tank 26 is removed from the inclined portion 44a by the flow of cooling water. Can be climbed along. Moreover, since the angle θ of the climbing gradient of the inclined portion 44a is 6 ° or more, even if the length of the inclined portion 44a is relatively short, the step between the inclined portion 44a and the groove portion 44b can be made sufficiently large. In addition, it is possible to sufficiently generate a local water flow in the groove 44b and prevent the dust that has entered the groove 44b from flowing out of the groove 44b. The angle θ of the climbing gradient of the inclined portion 44a is more preferably 7 ° to 9 ° with respect to the intermediate surface 26b of the water tank 26, and optimally 8 ° with respect to the intermediate surface 26b of the water tank 26. It is.

  The height h of the top of the inclined portion 44a is set to 10 mm or more with reference to the groove 44b. According to this configuration, since the height h of the top portion of the inclined portion 44a is set to 10 mm or more with reference to the groove portion 44b, the step difference between the inclined portion 44a and the groove portion 44b can be sufficiently increased, and the groove portion 44b is locally localized. A sufficient water flow can be generated to prevent the dust that has entered the groove 44b from flowing out of the groove 44b. In addition, if it demonstrates for reference, the extension length of the horizontal direction of the groove part 44b is about 50 mm.

  Returning to FIG. 2 again, another function of the dust collection device 40 will be described. In the garbage collection device 40, the height of the upper end of the dust stopper 42 is about 100 mm with respect to the intermediate surface 26b, while the height of the upper end of the water level adjustment pipe 32 is about 200 mm with reference to the intermediate surface 26b. is there. That is, since the upper end of the dust stopper 42 is set lower than the upper end of the water level adjustment pipe 32, the upper end of the dust stopper 42 is lower than the water level of the water tank 26. According to this configuration, even when dust adheres to almost the entire plate surface of the dust stopper 42 and the through hole of the dust stopper 42 is clogged, the upper end of the dust stopper 42 is higher than the water level of the water tank 26. Since it is low, the cooling water flows above the dust stopper 42 and reaches the cooling water outlet. Therefore, even when the through hole of the dust stopper 42 is clogged, a sufficient flow rate of the cooling water can be secured and sufficient cooling water can be supplied to each part of the building 10.

  Next, a dust collection device 50 according to a modified example will be described with reference to FIG. The dust collection device 50 according to the modification is configured to be divided into a plurality of pieces. More specifically, the dust collection device 50 can be divided at the center of two sides facing each other, and the dust collection device 50 can be divided into two pieces 50A and 50B. The divided two pieces 50A and 50B of the dust collection device 50 can be coupled to each other by a fixing method such as screwing or fitting. According to this configuration, since the dust collection device 50 is configured to be divided into a plurality of pieces, the separation of the dust collection device 50 can be performed even in a situation where the piping P or the like in the cooling tower 20 becomes an obstacle to the installation of the dust collection device 50. Combining the two pieces 50A, 50B at the installation position makes it possible to easily install the dust collection device 50.

It is a schematic diagram which shows the building in which the cooling tower was installed. It is a block diagram which shows the internal structure of a cooling tower lower part. It is a perspective view which shows the external appearance of a garbage collection apparatus. It is sectional drawing of a part of garbage collection apparatus. It is a perspective view which shows the external appearance of the refuse collection | recovery apparatus which concerns on a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Building, 12A, 12B ... Piping, 14A, 14B, 14C, 14D, 14E ... Air conditioner, 16A, 16B ... Water pump, 18A, 18B ... Strainer, 20 ... Cooling tower, 22 ... Blower fan, 24 ... Filler, 26 ... Water tank, 26a ... Side, 26b ... Intermediate surface (bottom surface), 26c ... Bottom surface, 28 ... Wire mesh type strainer, 30 ... Water collecting part, 32 ... Water level control pipe, 34 ... Cavity, 40 ... Dust collection device, 42 ... Dust stopper, 44... Dust receiver, 44 a. Inclined portion, 44 b. Groove, 50.

Claims (6)

A garbage collection device that can be placed in a water tank of a cooling tower and can be taken up from the water tank when placed in the water tank,
A substantially plate-shaped dust stopper for stopping dust flowing on the bottom surface of the water tank, which is erected from the bottom surface of the water tank so as to surround the cooling water outlet, and has a number of through holes formed on the plate surface;
A substantially plate-shaped dust receiver for accumulating the dust stopped by the dust stopper extending from the vicinity of the lower end of the dust stopper toward the upstream side of the flow of the cooling water along the bottom surface of the water tank. And
A cooling tower garbage collection device comprising: The garbage receiver is
An inclined part with an upward slope toward the dust stopper;
A groove provided between the inclined portion and the dust stopper,
The garbage collection apparatus of the cooling tower of Claim 1 characterized by the above-mentioned.   The cooling tower dust collection apparatus according to claim 2, wherein an angle of climb of the inclined portion is 6 ° to 10 ° with respect to a bottom surface of the water tank.   The height of the top part of the said inclination part is 10 mm or more on the basis of the said groove part, The garbage collection apparatus of the cooling tower of Claim 2 or 3 characterized by the above-mentioned.   5. The dust collection device for a cooling tower according to claim 1, wherein an upper end of the dust stopper is lower than a water level of the water tank.   6. The cooling tower dust collection device according to claim 1, wherein the dust collection device is divided into a plurality of pieces.

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