Circulating water tower external precooling type cooling tower

Abstract

The utility model discloses an external precooling type cooling tower of a circulating water tower, which belongs to the technical field of cooling towers, and comprises a tower body, a support frame, an air outlet barrel, a filler and a connecting water distribution structure, the support frame is arranged in the tower body, the air outlet barrel is mounted at the top of the support frame, the filler is mounted on the support frame, and the water distribution structure comprises a water distribution header pipe, branch pipes and nozzles. The main water distribution pipe is located outside the tower body, the branch pipes are arranged at intervals and comprise longitudinal pipes and transverse pipes, the lower ends of the longitudinal pipes are connected with the main water distribution pipe, the upper ends of the longitudinal pipes are communicated with one ends of the transverse pipes, parts of the transverse pipes extend into the tower body and are located above the filler, the other parts of the transverse pipes extend out of the tower body, and the nozzles are installed on the transverse pipes. And a gap is reserved between the longitudinal pipe and the outer side wall of the tower body. The circulating water can fully exchange heat with relatively cold air outside the tower body in the process of rising in the longitudinal pipe, so that the pre-cooling effect on the circulating water before entering the tower body is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, and particularly to an externally pre-cooled cooling tower for circulating water towers. Background Art

[0002] A cooling tower is a cooling device that exchanges heat between industrial circulating water and air flow contact to reduce the temperature of the circulating water. For a conventional countercurrent cooling tower, after the circulating water absorbs heat in the condenser or other equipment, under a certain pressure, it is sent along the main pressure water pipe to the distribution water pipe arranged at a certain height from the ground at the lower part of the tower body. Then, it is sprayed above the filler under the action of a nozzle through a plurality of branch pipes connected to the distribution water pipe. After the circulating water passes through the filler and exchanges heat with the rising cold air, it falls into the storage pool arranged below the ground.

[0003] The existing water distribution system of cooling towers generally includes a main water distribution pipe and a plurality of branch pipes connected to the upper end of the main water distribution pipe, and the plurality of branch pipes are dispersedly arranged inside the tower body. For example, the various dispersed auxiliary water distribution cooling towers disclosed in the Chinese patent document with the publication number CN116558319A include a cooling tower body, and a spraying system connected to the main pipe is arranged inside the cooling tower body. The spraying system includes a plurality of spray pipes arranged at intervals, and a plurality of nozzles are installed along the length direction of each spray pipe. When in use, the circulating water flows into the tower body through a main pipe outside the tower, and then is sprayed on the filler through a plurality of spray pipes. Another example is the sewage cooling tower water distribution pipe disclosed in the Chinese patent document with the publication number CN207675028U, which is used in a cooling tower and includes a main water distribution pipe and a water inlet pipe communicated with the main water distribution pipe, and a plurality of water distribution branch pipes respectively communicated with the main water distribution pipe. When in use, the circulating water enters the main water distribution pipe through the water inlet pipe, and then is sprayed down through the water distribution branch pipes inside the tower. In the technologies in the above two patent documents, when in use, the circulating water is shunted into the branch pipes inside the tower body. Since the temperature inside the tower body is relatively higher than that outside the tower, the temperature of the circulating water is also relatively high when it enters the branch pipes, and it is impossible to pre-cool the circulating water outside the tower, and the heat exchange efficiency is not high. Based on this, the inventor has improved the water distribution structure of the cooling tower to achieve external pre-cooling of the tower. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that in the prior art, the circulating water entering the tower through the main pipe is shunted inside the tower, and it is impossible to efficiently pre-cool the circulating water outside the tower in the water distribution system. Based on this, the utility model provides an externally pre-cooled cooling tower for circulating water towers.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows: A pre-cooling cooling tower outside a circulating water tower, which includes a tower body, a support frame, an air outlet cylinder, packing, and a water distribution structure. The support frame is arranged inside the tower body. The air outlet cylinder is installed on the top of the support frame. The packing is installed on the support frame. The water distribution structure includes a main water distribution pipe, branch pipes, and nozzles. The main water distribution pipe is located outside the tower body. There are multiple branch pipes which are arranged at intervals. The branch pipe includes a vertical pipe and a horizontal pipe. The lower end of the vertical pipe is connected to the main water distribution pipe. The upper end of the vertical pipe is communicated with one end of the horizontal pipe. A part of the horizontal pipe extends into the tower body and is located above the packing. Another part of the horizontal pipe extends out of the tower body. The nozzles are installed on the horizontal pipe. A gap is left between the vertical pipe and the outer side wall of the tower body.

[0006] Further, the multiple branch pipes are parallel to each other and arranged at equal intervals along the length direction of the main water distribution pipe.

[0007] Further, the vertical pipe includes multiple vertically-connected vertical pipe sub-pipes. Each adjacent two vertical pipe sub-pipes are connected by a first connection sleeve. The horizontal pipe includes multiple horizontally-connected horizontal pipe sub-pipes. Each adjacent two horizontal pipe sub-pipes are connected by a second connection sleeve.

[0008] Further, the branch pipe further includes a transition elbow. One end of the vertical pipe is connected to one end of the transition elbow. One end of the horizontal pipe is connected to the other end of the transition elbow.

[0009] Further, the support frame includes multiple vertically-arranged columns and multiple support frames fixedly connected to the columns. The multiple support frames are arranged in sequence longitudinally. The horizontal pipe is fixedly connected to one of the support frames.

[0010] Further, the support frame further includes a support top plate horizontally connected to the top of the columns. The air outlet cylinder is installed on the support top plate. An induced draft fan is installed inside the air outlet cylinder.

[0011] Further, the tower body has a cuboid structure with both upper and lower ends being through. The tower body includes a front tower wall, a left tower wall, a rear tower wall, and a right tower wall which are connected in sequence. A through hole is opened on the right tower wall. The horizontal pipe passes through the through hole.

[0012] Further, an air inlet is opened at the bottom of the right tower wall.

[0013] The beneficial effects of the present utility model are as follows: For the externally pre-cooled cooling tower of the circulating water tower of the present utility model, through the improvement of the water distribution structure, compared with the traditional water distribution structure, during the process of the circulating water rising in the vertical pipe, it can fully exchange heat with the relatively cold air outside the tower body, realizing the pre-cooling effect on the circulating water before entering the tower body. At the same time, by setting multiple branch pipes for water diversion, the heat exchange area between the circulating water and the air outside the tower body is increased, thereby improving the heat exchange efficiency of the entire tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0015] Figure 1 is a perspective view of the externally pre-cooled cooling tower of the circulating water tower of the present utility model;

[0016] Figure 2 is Figure 1 a partial exploded view of the externally pre-cooled cooling tower of the circulating water tower shown;

[0017] Figure 3 is Figure 1 a perspective view of the water distribution structure in the externally pre-cooled cooling tower of the circulating water tower shown;

[0018] Figure 4 is Figure 1 a top view of the externally pre-cooled cooling tower of the circulating water tower shown;

[0019] Figure 5 is Figure 1 a sectional view of the externally pre-cooled cooling tower of the circulating water tower shown along A-A.

[0020] In the figures: 1. Tower body, 11. Front tower wall, 12. Left tower wall, 13. Rear tower wall, 14. Right tower wall, 141. Through hole, 2. Frame made, 21. Support column, 22. Support frame, 23. Top plate, 3. Air outlet cylinder, 31. Induced draft fan, 4. Water distribution structure, 41. Water distribution main pipe, 42. Branch pipe, 421. Vertical pipe, 4211. First connection sleeve, 422. Horizontal pipe, 4221. Second connection sleeve, 423. Transition elbow. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will now be described in detail in conjunction with the drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner, so it only shows the components related to the present utility model.

[0022] Please refer to Figures 1-5, the present utility model provides an externally pre-cooled cooling tower for circulating water towers, which includes a tower body 1, a support frame 2, an air outlet cylinder 3, a packing (not shown in the figure), and a water distribution structure 4. The support frame 2 is arranged inside the tower body 1, and the air outlet cylinder 3 is installed on the top of the support frame 2. The packing is horizontally installed on the support frame 2. The water distribution structure 4 includes a main water distribution pipe 41, branch pipes 42, and spray nozzles (not shown in the figure). The main water distribution pipe 41 is located outside the tower body 1. There are multiple branch pipes 42 arranged at intervals. The branch pipe 42 includes a vertical pipe 421 and a horizontal pipe 422. The lower end of the vertical pipe 421 is connected to the main water distribution pipe 41 and is perpendicular to each other. The upper end of the vertical pipe 421 is communicated with one end of the horizontal pipe 422. A part of the horizontal pipe 422 extends into the tower body 1 and is located above the packing, and the other part of the horizontal pipe 422 extends outside the tower body 1. The spray nozzles are installed on the horizontal pipe 422, and there is a gap between the vertical pipe 421 and the outer side wall of the tower body 1.

[0023] In the externally pre-cooled cooling tower of the present utility model, during use, hot circulating water is pumped into the main water distribution pipe 41 under the action of a water pump, and then is distributed into a plurality of parallel branch pipes 41. It flows upward through the vertical pipes 421 outside the tower and into the horizontal pipe 422, and finally is sprayed onto the packing through the spray nozzles. During the process of the circulating water dripping downward after passing through the packing, it will contact the dry and cold gas rising in the tower and undergo heat exchange, thereby realizing the cooling effect on the circulating water.

[0024] During the above working process, before the circulating water enters the interior of the tower body 1, it has already been diverted from the main water distribution pipe 41 through a plurality of branch pipes 42 located outside the tower body 1. Compared with the traditional water distribution method of diverting inside the tower, the circulating water of the present utility model will undergo heat exchange with the relatively lower air outside the tower during the upward process along the vertical pipe 421. After the heat exchange, the circulating water enters the horizontal pipe 422 and is then sprayed onto the packing. The circulating water can be pre-cooled after heat exchange with the air outside the tower, and the circulating water before entering the tower is initially cooled. At the same time, by setting a plurality of branch pipes 42, the heat exchange area between the circulating water and the air outside the tower is increased, thereby improving the heat exchange efficiency. In addition, there is a gap between the vertical pipe 421 and the tower body 1, which avoids the contact between the vertical pipe 421 and the tower body 1, effectively preventing the high temperature of the tower body 1 itself from being transmitted to the vertical pipe 421 through contact conduction. The setting of this gap also ensures that there is sufficient heat dissipation space around the vertical pipe 421, which is beneficial to the rapid dissipation of heat.

[0025] Please refer to Figure 3, in this embodiment, the main water distribution pipe 41 has a hollow circular pipe structure with one end open. A plurality of branch pipes 42 are arranged parallel to each other and equidistantly along the length direction of the main water distribution pipe 41 to achieve uniform precooling of the cooling water. As a preferred embodiment, the longitudinal pipe 421 includes a plurality of longitudinally connected sub-pipes, and each adjacent two of the longitudinally connected sub-pipes are connected by a first connecting sleeve 4211 to coaxially connect the plurality of longitudinally connected sub-pipes. The transverse pipe 422 includes a plurality of longitudinally connected sub-pipes, and each adjacent two of the longitudinally connected sub-pipes are connected by a second connecting sleeve 4221 to coaxially connect the plurality of longitudinally connected sub-pipes.

[0026] Both the longitudinal pipe 421 and the transverse pipe 422 are provided with a docking structure composed of a plurality of sub-pipes, and the lengths of the main pipe 421 and the transverse pipe 422 can be adjusted according to the needs of users to adapt to the configuration requirements of cooling towers with different widths and heights.

[0027] As a specific embodiment, the branch pipe 42 further includes a transition elbow 423. The transition elbow 423 is a 90° bent pipe. The upper end of the longitudinal pipe 421 is connected to one end of the transition elbow 423, and one end of the transverse pipe 422 is connected to the other end of the transition elbow 423. During operation, the circulating water sequentially passes through the longitudinal pipe 421 and the transition elbow 423 and then enters the transverse pipe 422. The setting of the transition elbow 423 is beneficial to the smooth entry of the circulating water into the transverse pipe 422 and reduces the flow resistance of the circulating water.

[0028] Please refer to Figure 2 , the support frame 2 includes a plurality of vertically arranged columns 21 and a plurality of support frames 22 fixedly connected to the columns 21. The plurality of support frames 22 are arranged in sequence longitudinally. The support frame 22 is composed of alternately horizontal and vertical frames. The setting of the plurality of support frames 22 can improve the structural strength of the support frame 2. At the same time, the support frame 22 itself is a hollow structure, which reduces the obstruction to the flow of air and circulating water as much as possible. In addition, the transverse pipe 422 is fixedly connected to one of the support frames 22 to improve the connection stability between the branch pipe 42 and the support frame 2.

[0029] Furthermore, the support frame 2 further includes a support top plate 23 horizontally connected to the top of the column 21. The air outlet cylinder 3 is installed on the support top plate 23, and a draft fan 31 is installed in the air outlet cylinder 3. During operation, the draft fan 31 rotates, so as to promote the dry cold air outside the tower to enter the tower body 1 from the bottom of the side wall of the tower body 1 and flow upward, and exchange heat with the falling circulating water to cool the circulating water.

[0030] In this embodiment, the tower body 1 has a box structure with both upper and lower ends penetrating. The tower body 1 has a cuboid structure and is arranged to surround the outside of the support frame 2. The tower body 1 includes a front tower wall 11, a left tower wall 12, a rear tower wall 13, and a right tower wall 14 that are connected in sequence. A through hole 141 is formed in the right tower wall 14, and the horizontal pipe 422 penetrates through the through hole 141. In a specific embodiment, an air inlet (not shown in the figure) is formed at the bottom of at least one of the front tower wall 11, the left tower wall 12, the rear tower wall 13, and the right tower wall 14, so that when the induced draft fan 31 is started, the dry cold air outside the tower can enter the inside of the tower body 1 through the air inlet. Further, when the air inlet is arranged on the tower wall of the tower body 1 close to the vertical pipe 421 (in this embodiment, the air inlet is arranged on the right tower wall 14), the dry cold air entering the inside of the tower body 1 through the air inlet can directly flow through the vertical pipe 421, thereby further improving the cooling effect on the circulating water.

[0031] For the pre-cooling type cooling tower outside the circulating water tower of the present utility model, through the improvement of the water distribution structure 4, compared with the traditional water distribution structure, the circulating water can fully exchange heat with the relatively cold air outside the tower body 1 during the rising process in the vertical pipe 421, realizing the pre-cooling effect on the circulating water before entering the inside of the tower body 1. At the same time, by arranging a plurality of branch pipes 42 for shunting, the heat exchange area between the circulating water and the air outside the tower body 1 is increased, thereby improving the heat exchange efficiency of the whole tower. In addition, during installation, first fixedly connect a plurality of branch pipes 42 to the water distribution main pipe 41, then insert the end of the branch pipe 42 into the inside of the tower body 1, and then fixedly connect the branch pipe 42 to the support frame 2, which greatly facilitates the installation operation and is convenient for popularization and use.

[0032] Enlightened by the above ideal embodiments according to the present utility model, through the above description, relevant workers can completely make various changes and modifications without departing from the scope of the present utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A circulating water tower external precooling cooling tower, characterized in that: It includes a tower body, a support frame, an air outlet, fillers and a water distribution structure. The support frame is arranged inside the tower body, the air outlet is installed on the top of the support frame, the fillers are installed on the support frame, the water distribution structure includes a water distribution main pipe, branch pipes and a nozzle, the water distribution main pipe is located outside the tower body, there are multiple branch pipes and they are arranged at intervals, the branch pipes include a longitudinal pipe and a transverse pipe, the lower end of the longitudinal pipe is connected to the water distribution main pipe, the upper end of the longitudinal pipe is connected to one end of the transverse pipe, the transverse pipe partly extends into the tower body and is located above the fillers, the other part of the transverse pipe extends to the outside of the tower body, the nozzle is installed on the transverse pipe, and a gap is left between the longitudinal pipe and the outer wall of the tower body.

2. The circulating water tower external precooling cooling tower as claimed in claim 1, characterized in that: The plurality of branch pipes are parallel to each other and are arranged at equal intervals along the length direction of the water distribution main pipe.

3. The circulating water tower external precooling cooling tower as claimed in claim 1, characterized in that: The longitudinal pipe includes a plurality of longitudinal branch pipes connected in sequence, and each adjacent two longitudinal branch pipes are connected via a first connecting sleeve. The transverse pipe includes a plurality of longitudinal branch pipes connected in sequence, and each adjacent two longitudinal branch pipes are connected via a second connecting sleeve.

4. The circulating water tower external precooling cooling tower as claimed in claim 1, characterized in that: The branch pipe also includes a transition elbow, the upper end of the longitudinal pipe is connected to one end of the transition elbow, and one end of the transverse pipe is connected to the other end of the transition elbow.

5. The circulating water tower external precooling cooling tower according to any one of claims 1 to 4, characterized in that: The support frame includes a plurality of vertically arranged pillars and a plurality of support frames fixedly connected to the pillars. The plurality of support frames are arranged in sequence along the longitudinal direction, and the cross tube is fixedly connected to one of the support frames.

6. The circulating water tower external precooling cooling tower as claimed in claim 5, characterized in that: The support frame also includes a support top plate horizontally connected to the top of the pillar, the air outlet duct is installed on the support top plate, and an induced draft fan is installed in the air outlet duct.

7. The circulating water tower external precooling cooling tower as claimed in claim 5, characterized in that: The tower body is a rectangular parallelepiped structure with upper and lower ends penetrated, and the tower body comprises a front tower wall, a left tower wall, a rear tower wall and a right tower wall connected in sequence, a through hole is opened on the right tower wall, and the transverse pipe is arranged to pass through the through hole.

8. The circulating water tower external precooling cooling tower as claimed in claim 7, characterized in that: An air inlet is provided at the bottom of the right tower wall.

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