CN216869241U - Cross-flow indirect evaporation open type cooling tower - Google Patents
Cross-flow indirect evaporation open type cooling tower Download PDFInfo
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- CN216869241U CN216869241U CN202123446082.7U CN202123446082U CN216869241U CN 216869241 U CN216869241 U CN 216869241U CN 202123446082 U CN202123446082 U CN 202123446082U CN 216869241 U CN216869241 U CN 216869241U
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Abstract
The utility model relates to a cross-flow indirect evaporation open type cooling tower, which comprises a gas-liquid heat exchanger, a cooling water inlet, a water distributor, a filler, a fan, a water pan, a water tank, a circulating water pump, a cooling water outlet and a cooling tower shell, wherein the cooling water inlet is communicated with the water distributor; the gas-liquid heat exchanger is positioned at an air inlet of the cooling tower shell, a water inlet at the lower part of the gas-liquid heat exchanger is connected with a water outlet of the circulating water pump through a water pipe, a water inlet of the circulating water pump is connected with a water tank through a water pipe, a water outlet at the top of the gas-liquid heat exchanger is connected with a water distributor through a water pipe, a cooling water inlet is connected with the water distributor, the filler is positioned below the water distributor, the water receiving disc is positioned below the filler, and the water tank is positioned below the water receiving disc. The temperature of the whole parallel flow heat exchanger, the air flowing in parallel and the air and water in the filler can be distributed in a gradient manner from cold to heat from bottom to top, the evaporation efficiency of the upper part and the cooling capacity of the cooling tower can be improved, and the outlet water temperature of the lower part can be reduced.
Description
Technical Field
The utility model relates to the field of evaporative cooling and heat exchange products, in particular to a cross flow indirect evaporative open cooling tower of a gas-liquid heat exchanger adopting a cross flow heat exchange mode.
Background
The dew-point indirect evaporative cooling is a process of generating cold air or cold water by heat transfer and mass transfer through air and water contact in one space of mutually isolated heat exchangers, then carrying out sensible heat exchange with ambient air in the other space of the heat exchangers through the wall of the heat exchangers, and then directly evaporating on the surface of a filler to obtain the cold air or the cold water. In the dew point type indirect evaporative cooling process, air can be cooled through the evaporative cooling heat exchanger or the gas-liquid heat exchanger, then cold air and cold water can be obtained through direct evaporative cooling, and part of cold water generated in the process is used as a cold source in the heat exchange mode of the gas-liquid heat exchanger.
At present, the main stream dew point type indirect evaporative cooling equipment adopts a countercurrent mode design, and precooling heat exchangers are mainly tubular evaporative cooling heat exchangers and tube-fin heat exchangers, so that the equipment is large and heavy in size and low in processing capacity.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the existing products and technologies, the utility model aims to provide a cross-flow indirect evaporation open type cooling tower adopting a cross-flow heat exchange mode gas-liquid heat exchanger, wherein a precooling heat exchanger of the indirect evaporation open type cooling tower is positioned outside a filler; when the gas-liquid heat exchanger works, the flowing directions of the internal water flow and the air are in a 90-degree cross flow mode, the temperature of the internal water flow forms gradient distribution from cold to heat along the flowing direction, so that the temperature of the water flowing out of the upper part of the heat exchanger and the temperature of the air flowing through the heat exchanger are higher, the evaporation capacity of the water on the upper part of the packing and the processing capacity of the cooling tower can be improved, and meanwhile, the temperature of the wet bulb is greatly reduced and the temperature of the water flowing out of the cooling tower can be reduced because the air flowing through the lower area is reduced to be lower.
The utility model can realize that the temperature of the gas-liquid heat exchanger, the inflow air, the air in the filler and the water is integrally distributed in a gradient manner from cold to heat from bottom to top, and can simultaneously improve the evaporation efficiency of the upper part, the cooling capacity of the cooling tower and reduce the outlet water temperature of the lower part. The cross-flow indirect evaporative cooling open tower not only has the advantage of high cooling capacity of the cross-flow open cooling tower, but also has the advantage of low outlet water temperature of the indirect evaporative open cooling tower.
The technical scheme of the implementation case of the utility model is as follows:
a cross-flow indirect evaporation open type cooling tower comprises a gas-liquid heat exchanger, a cooling water inlet, a water distributor, a filler, a fan, a water receiving tray, a water tank, a circulating water pump, a cooling water outlet and a cooling tower shell; the gas-liquid heat exchanger is positioned at an air inlet of the cooling tower shell, a water inlet at the lower part of the gas-liquid heat exchanger is connected with a water outlet of the circulating water pump through a water pipe, a water inlet of the circulating water pump is connected with the water tank through a water pipe, a water outlet at the top of the gas-liquid heat exchanger is connected with the water distributor through a water pipe, a cooling water inlet is connected with the water distributor, the filler is positioned below the water distributor, the water receiving tray is positioned below the filler, the water tank is positioned below the water receiving tray, and the fan is positioned at an air outlet at the top of the cooling tower shell; and the water flow channel of the heat exchange branch pipe in the gas-liquid heat exchanger is a single flow from bottom to top, and the direction of the internal water flow and the flow direction of the gap air of the gas-liquid heat exchanger form a 90-degree cross angle.
Preferably, the gas-liquid heat exchanger is a tube-fin heat exchanger, and the tube-fin heat exchanger includes a liquid distribution pipe and a liquid collection pipe, the liquid distribution pipe is located at a lower portion of the tube-fin heat exchanger, and the liquid collection pipe is located at an upper portion of the tube-fin heat exchanger.
Preferably, the gas-liquid heat exchanger is a parallel flow heat exchanger.
Preferably, the gas-liquid heat exchanger is a corrugated plate tube parallel flow heat exchanger.
Preferably, the corrugated plate tube parallel flow heat exchanger comprises a plurality of corrugated plate tubes, an upper collecting tube and a lower collecting tube, wherein the outer walls of the corrugated plate tubes are corrugated in the flowing direction of external air, a plurality of isolated inner tubes are arranged in the corrugated plate tubes, the inner tubes are communicated with the upper collecting tube and the lower collecting tube to form a liquid flowing channel, and an air flowing channel is formed between the plurality of corrugated plate tubes.
Compared with the prior art, the utility model has the beneficial effects that:
when the heat exchanger works, liquid flows in the inner space of the corrugated plate tube and exchanges heat with air passing through the outer corrugated surface; the outer wall of the corrugated plate pipe is corrugated in the horizontal air flowing direction, so that the contact heat exchange area between air and the corrugated plate pipe is larger, the wind stroke is longer, the wind speed is slower, and the heat exchange is more sufficient; the corrugated outer surface can ensure that the heat exchange capacity and the heat exchange efficiency meet the design requirements; the inner spaces of the upper collecting pipe, the lower collecting pipe and the corrugated plate form a liquid flow channel, and the number of the partition plates can be set according to the temperature of liquid to form a single flow or multiple flows, so that the requirement on heat exchange efficiency is met;
precooling circulating water enters from the lower part of the heat exchanger, flows in a liquid channel in the plate pipe, exchanges heat with air passing through the external corrugated surface, is heated by the air to become hot water when flowing out from the upper part, then flows into a water distributor after being mixed with cooling water entering through a water inlet, then flows into a filler through a water distribution nozzle, is cooled and then flows into a water tank through a water receiving disc;
the temperature of the whole parallel flow heat exchanger, the air flowing in parallel and the air and water in the filler can be distributed in a gradient manner from cold to heat from bottom to top, the evaporation efficiency of the upper part and the cooling capacity of the cooling tower can be improved, and the outlet water temperature of the lower part can be reduced. The cross-flow indirect evaporative cooling open tower not only has the advantage of high cooling capacity of the cross-flow open cooling tower, but also has the advantage of low outlet water temperature of the indirect evaporative open cooling tower.
Drawings
FIG. 1 is a first perspective view illustrating the arrangement of corrugated plate tubes of a corrugated plate tube parallel flow heat exchanger according to the present invention;
FIG. 2 is a front vertical cross-sectional schematic view of a corrugated plate tube parallel flow heat exchanger of the present invention;
FIG. 3 is a schematic view of the structure of a corrugated plate tube in a corrugated plate tube parallel flow heat exchanger according to the present invention;
FIG. 4 is a schematic diagram of a cross-flow indirect evaporative open cooling tower of the present invention;
FIG. 5 is a schematic structural view of a tube-fin heat exchanger according to the present invention;
10. a corrugated board pipe; 11. an inner conduit; 20. an upper header; 30. a lower header; A/A, the external air flow direction; 41. a liquid collecting pipe; 42. a liquid separating pipe; 43. a fin set; 50. a gas-liquid heat exchanger and a 51 circulating water pump; 52. a water distributor; 53. a filler; 54. a water pan; 55. a water tank; 56. a fan; 57. a cooling tower shell 58 and a cooling water inlet; 59. a cooling water outlet.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.
FIG. 4 is a schematic view of a cross-flow indirect evaporative open cooling tower of the present invention, as shown in FIG. 4; the cooling tower comprises a gas-liquid heat exchanger 50, a cooling water inlet 58, a water distributor 52, a filler 53, a fan 56, a water receiving tray 54, a water tank 55, a circulating water pump 51, a cooling water outlet 59 and a cooling tower shell 57, wherein the gas-liquid heat exchanger 50 is positioned at an air inlet of the cooling tower shell 57, an inlet at the lower part of the gas-liquid heat exchanger is connected with a water outlet of the circulating water pump through a water pipe, a water inlet of the circulating water pump is connected with the water tank through a water pipe, a water outlet at the top of the gas-liquid heat exchanger is connected with the water distributor through a water pipe, the water distributor is connected with the cooling water inlet through a water pipe, the filler is positioned below the water distributor, the water receiving tray is positioned below the filler, the water tank is positioned below the water receiving tray through a water pipe, and the fan is positioned at an air outlet of the cooling tower shell. The water flow channel of the heat exchange branch pipe in the gas-liquid heat exchanger is a single flow from bottom to top, and the direction of the internal water flow and the air flowing direction in the gap of the gas-liquid heat exchanger form a 90-degree cross angle.
External air enters the filler after being subjected to heat exchange and precooling through the gas-liquid heat exchanger to cool cooling water with higher temperature, cooling water with lower temperature in the water tank is pumped by the circulating water pump to enter the gas-liquid heat exchanger from the lower part to perform heat exchange with the external air, flows out of the water distributor from the upper part after being heated to be distributed and sprayed in the filler together with the cooling water with higher temperature, performs convection heat exchange and evaporation cooling with the precooled external air, and is collected to the water receiving tray after being cooled and stored in the water tank.
In the present invention, the gas-liquid exchanger may be a tube-fin heat exchanger, as shown in fig. 5, fig. 5 is a schematic structural diagram of the tube-fin heat exchanger in the present invention; the tube-fin heat exchanger comprises a liquid distribution tube 41, a liquid collecting tube 42, a heat exchange tube group and a fin group 43, wherein the liquid distribution tube is positioned at the lower part of the tube-fin heat exchanger, the liquid collecting tube is positioned at the upper part of the tube-fin heat exchanger, the lower end of the heat exchange tube group is communicated with the liquid distribution tube, the upper end of the heat exchange tube group is communicated with the liquid collecting tube, the heat exchange tube group penetrates through the fin group and is crossed with the fin group at 90 degrees, the flowing direction of internal water flow and air is a 90-degree cross flow mode when the tube-fin heat exchanger works, cooling water with lower temperature in a circulating water pump is pumped into the liquid distribution tube from the lower part in a water tank, flows upwards through the heat exchange tube group, performs heat exchange with external air through heat conduction of the fin group, flows out from the liquid collecting tube at the upper part after temperature rise, is distributed and sprayed into a filler together with the water distributor and with the cooling water with the external air after precooling, performs convection heat exchange and evaporation and temperature reduction, and collects the water to a water receiving tray after cooling, stored in a water tank.
The temperature gradient distribution of the internal water flow of the tube-fin heat exchanger is formed along the flow direction (from bottom to top), the temperature of the water flowing out of the upper part of the heat exchanger and the temperature of the air flowing through the heat exchanger are both higher, the evaporation capacity of the water on the upper part of the packing and the processing capacity of the cooling tower can be improved, and simultaneously, the temperature of the wet bulb is greatly reduced and the temperature of the outlet water of the cooling tower can be reduced because the air flowing through the lower area is reduced to be lower.
Further, the gas-liquid heat exchanger is a parallel flow heat exchanger, and further, the gas-liquid heat exchanger is a corrugated plate tube parallel flow heat exchanger, and the specific structure of the corrugated plate tube parallel flow heat exchanger is described below.
FIG. 2 is a front vertical cross-sectional schematic view of a corrugated plate tube parallel flow heat exchanger of the present invention, as shown in FIG. 2; the heat exchanger is formed by splicing a plurality of corrugated plate tubes 10, an upper collecting tube 20 and a lower collecting tube 30, as shown in fig. 1, fig. 1 is a first three-dimensional schematic arrangement diagram of the corrugated plate tubes of the corrugated plate tube parallel flow heat exchanger in the utility model; corrugated plate pipe outer wall is the corrugate on outside air flow direction A/A, the A/A direction is the flow direction in the outside air inflow corrugated plate pipe parallel flow heat exchanger, corrugated plate pipe 10 inside has a plurality of inside pipes 11 of keeping apart mutually, inside pipe upper end and last collecting tube intercommunication, inside pipe lower extreme and lower collecting tube intercommunication, inside pipe and last collecting tube, the collecting tube is linked together and forms liquid flow channel down, form air flow channel between a plurality of corrugated plate pipes, air flow channel and liquid flow channel carry out the gas-liquid heat transfer. For the shape of the inlet and outlet openings of the inner pipeline, as shown in fig. 3, fig. 3 is a schematic structural diagram of the corrugated plate pipe in the corrugated plate pipe parallel flow heat exchanger of the present invention, and the shape of the inlet and outlet openings of the inner pipeline is preferably circular, or elliptical, square, etc., as long as the heat exchanger can be conducted, whether square or circular, as long as the shapes are consistent and regular, and only the following arrangement rules need to be satisfied: the line segment that the business turn over open-ended central point of inner tube connected gradually is sharp or ripple line, has just so realized that the outer wall of corrugated plate pipe is the corrugate in the flow direction of air for outside air is ripple route of marcing with the contact of corrugated plate pipe outer wall, and then has increased the area of contact and the contact time of outside air with the corrugated plate pipe, has improved the heat exchange efficiency of outside air with the corrugated plate pipe.
When the corrugated plate pipe parallel flow heat exchanger is used, liquid flows in the inner space of the corrugated plate pipe and exchanges heat with air passing through the outer corrugated surface; the corrugated outer surface can ensure that the heat exchange capacity and the heat exchange efficiency meet the design requirements.
When the corrugated plate pipe parallel flow heat exchanger is set to be a single flow, when the cooling tower works, precooled circulating water enters from the lower part of the heat exchanger, flows in a liquid channel in the plate pipe, exchanges heat with air passing through the external corrugated surface, is heated by the air to become hot water when flowing out from the upper part, then flows into the water distributor after being mixed with cooling water entering from the water inlet, then flows into the filler through the water distribution nozzle, is cooled and then flows into the water tank through the water receiving tray.
Precooling circulating water enters from the lower part, and the temperature of the air flowing in parallel, the air and the water in the filler is integrally distributed in a gradient manner from cold to heat from bottom to top in a mode that the precooling circulating water is discharged from the upper part, the evaporation efficiency of the water sprayed on the upper part of the filler can be improved due to the high temperature of the upper part, the cooling capacity of the cooling tower is improved, and the water outlet temperature of the lower part of the filler is reduced.
Because of the precooling circulating water level transverse flow mode, the area required by the precooling circulating water level transverse flow mode is smaller than that of a cooling tower in a counter flow mode, and meanwhile, precooling heat exchangers adopted in the counter flow mode mainly comprise tube type evaporative cooling heat exchangers and tube sheet type heat exchangers, the tube type evaporative cooling heat exchangers are heavy and large in size and low in processing capacity, and basically have no popularization value in southern regions. The corrugated plate pipe parallel flow heat exchanger adopts a cross flow mode, and the corrugated plate pipe outer wall is designed, so that the contact area and the contact time of external air and the heat exchanger are increased, and the heat exchange efficiency is improved. The cross-flow indirect evaporative cooling open tower not only has the advantage of high cooling capacity of the cross-flow open cooling tower, but also has the advantage of low outlet water temperature of the indirect evaporative open cooling tower.
The utility model has the beneficial effects that: when the heat exchanger works, liquid flows in the inner space of the corrugated plate tube and exchanges heat with air passing through the outer corrugated surface; the outer wall of the corrugated plate pipe is corrugated in the horizontal air flowing direction, so that the contact heat exchange area between air and the corrugated plate pipe is larger, the wind stroke is longer, the wind speed is slower, and the heat exchange is more sufficient; the corrugated outer surface can ensure that the heat exchange capacity and the heat exchange efficiency meet the design requirements; the inner spaces of the upper collecting pipe, the lower collecting pipe and the corrugated plate form a liquid flow channel, and the number of the partition plates can be set according to the temperature of liquid to form a single flow or multiple flows, so that the requirement on heat exchange efficiency is met;
precooling circulating water enters from the lower part of the heat exchanger, flows in a liquid channel in the plate pipe, exchanges heat with air passing through the external corrugated surface, is heated by the air to become hot water when flowing out from the upper part, then flows into a water distributor after being mixed with cooling water entering through a water inlet, then flows into a filler through a water distribution nozzle, is cooled and then flows into a water tank through a water receiving disc;
the temperature of the whole parallel flow heat exchanger, the air flowing in parallel and the air and water in the filler are distributed in a gradient manner from cold to heat from bottom to top, and the evaporation efficiency and the cooling capacity of the cooling tower on the upper portion can be improved and the outlet water temperature on the lower portion can be reduced. The cross-flow indirect evaporative cooling open tower not only has the advantage of high cooling capacity of the cross-flow open cooling tower, but also has the advantage of low water outlet temperature of the indirect evaporative open cooling tower.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A cross-flow indirect evaporative open cooling tower, comprising:
the cross-flow indirect evaporation open type cooling tower comprises a gas-liquid heat exchanger, a cooling water inlet, a water distributor, a filler, a fan, a water receiving disc, a water tank, a circulating water pump, a cooling water outlet and a cooling tower shell; the gas-liquid heat exchanger is positioned at an air inlet of the cooling tower shell, a water inlet at the lower part of the gas-liquid heat exchanger is connected with a water outlet of the circulating water pump through a water pipe, a water inlet of the circulating water pump is connected with the water tank through a water pipe, a water outlet at the top of the gas-liquid heat exchanger is connected with the water distributor through a water pipe, a cooling water inlet is connected with the water distributor, the filler is positioned below the water distributor, the water receiving tray is positioned below the filler, the water tank is positioned below the water receiving tray, and the fan is positioned at an air outlet at the top of the cooling tower shell; and the water flow channel of the heat exchange branch pipe in the gas-liquid heat exchanger is a single flow from bottom to top, and the direction of the internal water flow and the flow direction of the gap air of the gas-liquid heat exchanger form a 90-degree cross angle.
2. A cross-flow indirect evaporative open cooling tower as claimed in claim 1, wherein:
the gas-liquid heat exchanger is a tube-fin heat exchanger, the tube-fin heat exchanger comprises a liquid distribution pipe and a liquid collection pipe, the liquid distribution pipe is located at the lower part of the tube-fin heat exchanger, and the liquid collection pipe is located at the upper part of the tube-fin heat exchanger.
3. A cross-flow indirect evaporative open cooling tower as claimed in claim 1 wherein:
the gas-liquid heat exchanger is a parallel flow heat exchanger.
4. A cross-flow indirect evaporative open cooling tower as claimed in claim 1, wherein:
the gas-liquid heat exchanger is a corrugated plate pipe parallel flow heat exchanger.
5. A cross-flow indirect evaporative open cooling tower as claimed in claim 4, wherein:
the corrugated plate pipe parallel flow heat exchanger comprises a plurality of corrugated plate pipes, an upper collecting pipe and a lower collecting pipe, wherein the outer walls of the corrugated plate pipes are corrugated in the flowing direction of external air, a plurality of mutually isolated internal pipelines are arranged in the corrugated plate pipes, the internal pipelines are communicated with the upper collecting pipe and the lower collecting pipe to form a liquid flowing channel, and an air flowing channel is formed between the corrugated plate pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123446082.7U CN216869241U (en) | 2021-12-31 | 2021-12-31 | Cross-flow indirect evaporation open type cooling tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123446082.7U CN216869241U (en) | 2021-12-31 | 2021-12-31 | Cross-flow indirect evaporation open type cooling tower |
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| Publication Number | Publication Date |
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| CN216869241U true CN216869241U (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123446082.7U Active CN216869241U (en) | 2021-12-31 | 2021-12-31 | Cross-flow indirect evaporation open type cooling tower |
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2021
- 2021-12-31 CN CN202123446082.7U patent/CN216869241U/en active Active
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