Mist elimination device and cooling tower

Abstract

A demisting device and a cooling tower, which relate to the technical field of cooling towers, wherein the demisting device comprises: a stacked first flow path and a second flow path, and heat exchange is performed between the first airflow and the second airflow; the first airflow flowing in from one side of the demisting device in the width direction is introduced into the first inlet of the first flow path; the second airflow flowing in from the bottom of the demisting device is introduced into the second inlet of the second flow path; the first airflow flowing out of the first flow path is discharged to the first outlet above the demisting device; the second airflow flowing out of the second flow path is discharged to the second outlet above the demisting device, and the demisting device can play a role in water-saving demisting. The cooling tower comprises the demisting device as above.

Description

Technical Field

[0001] The invention relates to the technical field of cooling towers, in particular to a cooling tower with water-saving and mist-eliminating requirements. Background Art

[0002] In the cooling tower of the prior art, an air mixing part, a water collecting and mist catching part, a spraying part, a heat exchange part, an air inlet part and a water collecting part are sequentially arranged in the cooling tower body from top to bottom. An exhaust part is arranged at the upper part of the body, and the exhaust part includes a wind tube and an induced draft fan arranged in the wind tube. Water is sprayed from the spraying part to the heat exchange part, and the heat exchange part is formed by stacking a plurality of filler sheets. The sprayed water flows from top to bottom. On the other hand, air is sucked into the cooling tower from the air inlet part at the lower part of the cooling tower and flows from bottom to top, transferring heat and mass with the sprayed hot water, thereby cooling the hot water.

[0003] The air after heat exchange with water is discharged from the cooling tower duct. The discharged air is saturated wet air. After mixing with the cold air outside the tower, the temperature drops and the saturated moisture content decreases, then the supersaturated water vapor will condense into fog. Especially in winter in high-latitude areas, the exhaust of the cooling tower will form thick fog, which will then generate rain and snow, causing adverse effects on the environment. More seriously, ice will form on the equipment and the ground, causing frost damage.

[0004] Chinese patent CN106225507B discloses a demisting and water-saving device of extraction condensation type, including a main tower, two groups of auxiliary towers are symmetrically arranged on both sides of the main tower, the auxiliary towers are located at the upper part of both sides of the main tower, each group of auxiliary towers is composed of a number of axial flow fans and tube bundles arranged side by side close to the side wall of the main tower, the auxiliary towers are arranged in double rows and multiple columns or in single row and two columns, and the bottom of the auxiliary tower is connected to the side wall of the main tower through the inclined bottom of the auxiliary tower. The present invention has the advantages of solving the problems of incomplete demisting, no water saving, large additional resistance, and serious weakening of the capacity of the original open cooling tower in the existing open cooling tower demisting device. However, the above technical solution has the following problems:

[0005] On the one hand, auxiliary towers are set up on both sides of the main tower, and several fans are added. When the auxiliary tower is needed to eliminate fog, it takes more fan energy to push the air through the tube bundle, which leads to a significant increase in the operating cost of the cooling tower. The main tower fan will inevitably affect the auxiliary tower fan's extraction of humid hot air, further increasing the energy consumption of the auxiliary tower fan; on the other hand, the dry cold air from the outside enters the main tower after absorbing heat through the horizontal channel and flows upward to form a dry warm air group. The humid hot air enters the module from the bottom of the module, releases heat and cools down to condense water, and the wet warm air continues to flow upward to gather into a wet warm air group. In order to ensure the effect of eliminating fog, the dry warm air and the wet warm air need to be mixed evenly to reduce the moisture content and become an unsaturated state. The dry warm air group and the wet warm air group are large in volume. If they are to be mixed evenly, they need to flow upward for a long distance, that is, a higher mixing space must be provided above the module. Therefore, the cooling tower must significantly increase its height and increase its cost. However, the height cannot be increased for the renovation of the old tower. Summary of the invention

[0006] In view of the above-mentioned technical problems existing in the prior art, the present invention provides a demisting device and a cooling tower, in which the air after heat exchange with water exchanges heat with the external cold air that flows into the cooling tower and has not exchanged heat with the air in the demisting device, thereby achieving the effect of water-saving and demisting.

[0007] To achieve the above-mentioned technical objectives, one aspect of the present invention provides a demisting device, including: a stacked first flow path and a second flow path, for performing heat exchange between the first airflow and the second airflow; introducing the first airflow flowing in from one side in the width direction of the demisting device into the first inlet of the first flow path; introducing the second airflow flowing in from the bottom of the demisting device into the second inlet of the second flow path; discharging the first airflow flowing out of the first flow path to the first outlet above the demisting device; and discharging the second airflow flowing out of the second flow path to the second outlet above the demisting device.

[0008] Preferably, the first outflow ports and the second outflow ports are alternately stacked.

[0009] Preferably, the width of the first outflow port is substantially the same as the width of the demisting device, and the width of the second outflow port is substantially the same as the width of the demisting device.

[0010] Preferably, the defogging device comprises a first defogging sheet and a second defogging sheet which limit and form the first and second flow paths, wherein the first defogging sheet and the second defogging sheet are alternately stacked.

[0011] Preferably, the thickness of the first outflow port gradually increases from one side edge of the mist dispelling device in the width direction to the other side.

[0012] Preferably, the height of the first inlet is substantially the same as the height of the demisting device, and the width of the second inlet is substantially the same as the width of the demisting device.

[0013] Preferably, the thickness of the first inlet is equal to or greater than the thickness of the second inlet.

[0014] Preferably, in the second flow path, a plurality of downstream connecting parts are formed on the demisting device; the plurality of downstream connecting parts divide the second flow path into a plurality of downstream channels, and the plurality of downstream channels occupy substantially the entire width of the demisting device.

[0015] Preferably, an introduction portion communicating with the first flow path is formed on one side in the width direction of the mist removing device.

[0016] Preferably, the thickness of the inlet of the introduction portion is greater than the thickness of the outlet of the introduction portion.

[0017] Preferably, a transition portion is formed between the introduction portion and the first flow path.

[0018] Preferably, the thickness of the transition portion gradually decreases from the inlet to the outlet.

[0019] Preferably, the thickness of the transition portion inlet is greater than the thickness of the first flow path inlet, and the thickness of the transition portion outlet is less than the thickness of the introduction portion outlet.

[0020] Preferably, the first defogging sheet and the second defogging sheet are formed with continuous portions folded from the outflow port of the introduction portion toward directions opposite to each other.

[0021] Preferably, at least one bending point is formed on the continuous portion, and in the transition portion, the thickness between the bending point on the first defogging sheet and the corresponding bending point on the second defogging sheet is smaller than the thickness of the inlet of the transition portion and larger than the thickness of the outlet of the transition portion.

[0022] Preferably, the bending point on the transition portion divides the continuous portion into at least two parts, and the angle α1 between the portion close to the inlet of the transition portion and the vertical plane is greater than the angle α2 between the portion close to the outlet of the transition portion and the vertical plane.

[0023] Preferably, the demisting device has a flow guiding structure for guiding the first airflow flowing in from one side of the width of the demisting device to a substantially full width range of the demisting device.

[0024] Preferably, the flow guiding structure includes a plurality of first flow guiding ridges formed in the first flow path, and the plurality of first flow guiding ridges are intermittently arranged and extend from the first inlet to a lower region of the first flow path.

[0025] Preferably, the flow guiding structure comprises a plurality of second flow guiding ridges formed in the first flow path, and the second flow guiding ridges divide the upper portion of the mist eliminating device into a plurality of independent flow guiding chambers.

[0026] Preferably, the cross-section of the second flow-guiding ridge portion in a direction parallel to the plane where the demisting device is located is formed into a V-shape, and the opening of the V-shape faces away from the first inlet.

[0027] Preferably, an inner angle β of the V-shape gradually increases from one side close to the first inlet to the other side.

[0028] Preferably, a guide groove for the first airflow to pass through is formed at the top of the guide cavity, and the rib spacing of the plurality of guide grooves gradually increases from one side close to the first inlet to the other side.

[0029] Preferably, the flow guiding structure includes a third flow guiding ridge portion formed in the first flow path, and a flow passage for airflow is formed between the third flow guiding ridge portion and a second flow guiding ridge portion close to the first inlet.

[0030] Preferably, a plurality of flow-dividing ridges are arranged in the first flow path and above the third flow-guiding ridge.

[0031] Preferably, the flow guiding structure includes a fourth flow guiding ridge portion formed in the first flow path, and the fourth flow guiding ridge portion is located on a side of the first flow path away from the first inlet.

[0032] Another aspect of the present invention provides a cooling tower, comprising the mist elimination device described in any of the above technical solutions.

[0033] Another aspect of the present invention provides a cooling tower, comprising: a body, including an air inlet formed at a lower portion thereof and allowing external air to flow in, and an exhaust portion formed at an upper portion thereof and discharging airflow; a heat exchange portion, located between the air inlet and the exhaust portion; a spray portion, located above the heat exchange portion, for spraying a medium onto the heat exchange portion; a demisting portion, located above the spray portion; the demisting portion comprising a demisting device; the demisting device comprising: a stacked first flow path and a second flow path, for performing heat exchange between the first airflow and the second airflow; introducing the first airflow flowing in from one side in the width direction of the demisting device into a first inlet of the first flow path; introducing the second airflow flowing in from the bottom of the demisting device into a first inlet of the first flow path Two air flows are introduced into the second inlet of the second flow path; the first air flow out of the first flow path is discharged to the first outlet above the demisting device; the second air flow out of the second flow path is discharged to the second outlet above the demisting device; and a cold air inlet part is formed on the side of the demisting part; the cold air inlet part is connected with the first flow path in the demisting device; the cold air inlet part extends in the horizontal direction and passes through at least one side wall of the cooling tower air chamber to be connected with the external air; wherein, the first air flow flows into the first flow path from the cold air inlet part; the second air flow flows from the air inlet through the heat exchange part and the spray part in sequence, and then flows into the second flow path.

[0034] Preferably, the cold air introduction part includes a first valve, and the cold air introduction part is connected to the external air through the first valve.

[0035] Preferably, the demisting device comprises two groups, and the two groups of demisting devices are arranged in a horizontal direction to constitute the demisting part of the cooling tower; a second valve is arranged between the two groups of demisting devices, and the air mixing part is connected with the space inside the tower below the second valve through the second valve.

[0036] Preferably, the cold air introduction part includes a third valve, and the cold air introduction part is connected with the external air through the third valve; the air mixing part is connected with the inner space of the tower below the third valve through the third valve.

[0037] Preferably, the third valve includes a first valve plate and a second valve plate, and the first valve plate and the second valve plate are pivotally connected to the cold air inlet portion; wherein the width of the first and second valve plates is the same as or different from the height of the cold air inlet portion.

[0038] Preferably, when the widths of the first and second valve plates are the same as the height of the cold air introduction portion, the first and second valve plates are flipped in the same direction to open or close the third valve.

[0039] Preferably, when the width of the first and second valve plates is different from the height of the cold air inlet portion, the width of the first and second valve plates each occupies half of the height of the cold air inlet portion; the first and second valve plates are flipped back to back or towards each other to open or close the third valve.

[0040] Preferably, an extension portion is provided at the cold air inlet portion, a module moving space is formed inside the extension portion, and at least a part of the demisting device can slide into the module moving space.

[0041] Preferably, a fourth valve is provided on a side of the extension portion facing away from the cooling tower, and the cold air inlet portion is connected to the external air through the fourth valve.

[0042] Preferably, an extension portion is provided at the cold air inlet portion, a module moving space is formed inside the extension portion, and at least a part of the demisting device can slide into the module moving space.

[0043] Preferably, a fourth valve is provided on a side of the extension portion facing away from the cooling tower, and the cold air inlet portion is connected to the external air through the fourth valve.

[0044] Preferably, the demisting device comprises two groups, and the two groups of demisting devices are arranged in a horizontal direction to constitute the demisting part of the cooling tower; a second valve is arranged between the two groups of demisting devices, and the air mixing part is connected with the space inside the tower below the second valve through the second valve.

[0045] Preferably, the demisting device comprises two groups, and the two groups of demisting devices are arranged in a horizontal direction to constitute the demisting part of the cooling tower; a second valve is arranged between the two groups of demisting devices, and the air mixing part is connected with the space inside the tower below the second valve through the second valve.

[0046] Preferably, an extension portion is provided at the cold air inlet portion, a module moving space is formed inside the extension portion, and at least a part of the demisting device can slide into the module moving space.

[0047] Preferably, a fourth valve is provided on a side of the extension portion facing away from the cooling tower, and the cold air inlet portion is connected to the external air through the fourth valve.

[0048] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0049] The first flow outlet and the second flow outlet are alternately stacked on the upper side of the demisting device, so that the first airflow flowing out through the first flow outlet and the second airflow flowing out through the second flow outlet can be evenly mixed, thereby enhancing the demisting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A schematic elevational cross-section of a cooling tower according to an embodiment of the present invention;

[0051] Figure 2 A disassembled view of a part of the mist elimination device in this embodiment;

[0052] Figure 3 A perspective view of a portion of the mist dissipation device in this embodiment;

[0053] Figure 4 A perspective view of a portion of a second embodiment of a defogging device;

[0054] Figure 5 is a front view of a first defogging sheet in the defogging device of this embodiment;

[0055] Figure 6 is a three-dimensional diagram of a second defogging sheet in the defogging device of this embodiment;

[0056] Figure 7 A front view of a portion of a mist dissipation device according to a third embodiment;

[0057] Figure 8 A top view of a portion of the mist dissipation device of this embodiment;

[0058] Fig. 9 The structure of the transition part of the mist dispelling device of this embodiment is schematically shown;

[0059] Fig.10 A top view of a portion of a mist dissipation device according to a fifth embodiment;

[0060] Fig.11 A perspective view of a portion of a sixth embodiment of a defogging device;

[0061] Fig.12 is a front view of a first defogging sheet in the defogging device of this embodiment;

[0062] Fig.13 is a perspective view of a second defogging sheet in the defogging device of this embodiment;

[0063] Fig.14 is a back view of the first defogging sheet in the defogging device of this embodiment;

[0064] Fig.15 is a front view of a second defogging sheet in the defogging device of this embodiment;

[0065] Fig.16 A schematic elevational cross-sectional view of a cooling tower according to a seventh embodiment;

[0066] Fig.17A schematic elevational cross-sectional view of a cooling tower according to an eighth embodiment;

[0067] Fig.18 is a schematic elevational cross-sectional view of a cooling tower according to a ninth embodiment, wherein the third valve is in an open state;

[0068] Fig.19 It is a schematic elevational cross-section of the cooling tower of this embodiment, wherein the third valve is in a closed state;

[0069] Fig. 20 A schematic elevational cross-section of a cooling tower according to a tenth embodiment;

[0070] Fig.21 A schematic elevational cross-sectional view of a cooling tower according to an eleventh embodiment;

[0071] Fig. 22 It is a schematic elevational cross-sectional view of a cooling tower according to a twelfth embodiment, wherein the third valve is in a closed state;

[0072] Fig.23 It is a schematic elevational cross-sectional view of a cooling tower according to a thirteenth embodiment;

[0073] Fig.24 It is a schematic elevational cross-sectional view of a cooling tower according to a fourteenth embodiment, wherein the mist dispelling device is in an unextended state;

[0074] Fig.25 It is a schematic elevational cross-section of the cooling tower of this embodiment, in which the mist elimination device is in a pulled-out state.

[0075] Description of Reference Numerals

[0076] 1000 cooling tower; 1010 main body; 1020 exhaust unit; 1021 air duct; 1022 induced draft fan; 1100 air mixing unit; 1200 spray unit; 1211 nozzle; 1300 heat exchange unit; 1400 air introduction unit; 1500 water collection unit; 1600 mist elimination unit; 1700 cold air introduction unit;

[0077] 1601, 1602 fog dissipation device;

[0078] 1600A first flow path; 1600B second flow path; 1610 first inlet; 1620 second inlet; 1630 functional part; 1640 first outlet; 1650 second outlet;

[0079] A, A' first defogging sheet; B, B' second defogging sheet; ZB1 first folding edge; ZB2 second folding edge; ZB3 third folding edge;

[0080] 2601 fog dissipation device;

[0081] 2610 first inlet; 2631A, 2631B strip-shaped protrusions;

[0082] A, A' first defogging sheet; B, B' second defogging sheet; A1, A2, B1, B2 deflection parts;

[0083] 3601 fog dissipation device;

[0084] 3600A first flow path; 3600B second flow path; 3610 first inlet; 3660 introduction part; 3661 transition part; 3661A, 3661B continuous part;

[0085] A, A' first defogging sheet; B, B' second defogging sheet; PA, PB deflection portion; WA1, WB1 first bending portion; WA2, WB2 second bending portion;

[0086] 4601 fog dissipation device;

[0087] 4610 first inlet; 4640 first outlet; A first defogging sheet; B second defogging sheet; FK1 first sealing portion; FK2 second sealing portion;

[0088] 5601 fog dissipation device;

[0089] 5610 First Stream Entrance;

[0090] 5632A, 5632B first guide rib; 5633A, 5633B second guide rib; 5634A, 5634B first guide section; 5635A, 5635B second guide section; 5636 guide groove; 5637A, 5637B third guide rib; 5638A, 5638B diversion section; 5639A, 5639B fourth guide rib; 5670 circulation channel; A first defogging sheet; B second defogging sheet;

[0091] 6000 cooling tower;

[0092] 6022 induced draft fan; 6200 spraying unit; 6211 nozzle; 6601, 6602 mist elimination device; 6700 cold air inlet; 6701 first valve; 6702 second valve; C hot and humid air channel;

[0093] 7000 cooling tower; 7601, 7602 demisting devices; 7700 cold air inlet; 7702 second valve; 7703 third valve; 7703A first valve plate, 7703B second valve plate; 7704 extension; 7705 fourth valve;

[0094] C wet hot air channel; D dry cold air channel; E wet hot air channel; G efficient circulation path; F module moving space;

[0095] 8000 cooling tower; 8601, 8602 demisting devices; 8700 cold air inlet; 8702 second valve; 8704 extension; 8705 fourth valve;

[0096] C: hot and humid air channel; F: module moving space. DETAILED DESCRIPTION

[0097] Other objects and advantages of the present invention will become apparent from the following explanation of preferred embodiments of the present invention.

[0098] [First embodiment]

[0099] Figure 1 The structure of each part of the cooling tower 1000 of this embodiment is shown. Figure 2 The X and Y directions are shown, wherein the X direction is the width direction of the demisting devices 1601 and 1602 , and the Y direction is the stacking direction of the demisting sheets, i.e. the thickness direction of the outflowing air curtain and the outflowing wind curtain, and is also the length direction of the demisting devices 1601 and 1602 .

[0100] Figure 1 FIG. 1 is a schematic diagram of the structure of a cooling tower 1000 according to the first embodiment of the present invention. Figure 1 As shown, in the body 1010 of the cooling tower 1000, an air mixing part 1100, a mist elimination part 1600, a spray part 1200, a heat exchange part 1300, an air introduction part 1400 and a water collection part 1500 are arranged from top to bottom. An exhaust part 1020 is arranged at the upper part of the body 1010, and the exhaust part 1020 includes a wind tube 1021 and an induced draft fan 1022 arranged in the wind tube 1021. An air inlet for allowing external air to flow in is formed at the lower part of the body 1010, and the external cold air flows through the heat exchange part 1300 and the spray part 1200 in sequence through the air inlet.

[0101] According to the above cooling tower 1000, the multiple groups of nozzles 1211 at the upper part of the spray part 1200 spray hot water downward, and the hot water falls in the internal space of the spray part 1200 and enters the heat exchange part 1300. In the heat exchange part 1300, the hot water exchanges heat with the cold air flowing in from the bottom of the heat exchange part 1300, flows out from the bottom of the heat exchange part 1300, falls to the water collection part 1500 after passing through the air introduction part 1400, and is collected from the bottom of the body 1010 of the cooling tower 1000. The above heat exchange part 1300 can use conventional filler sheets. The air introduction part 1400 can be provided with a shutter, and by adjusting the opening and closing size of the shutter, the amount of dry cold air flowing in from the air introduction part 1400 is adjusted, and then the amount of humid hot air entering the defogging device 1601, 1602 is adjusted, and the defogging effect is adjusted. For example, when the ambient temperature is low, the air inlet of the blinds can be adjusted to be smaller, so that the amount of dry cold air in the cold air inlet part 1700 is relatively large, thereby enhancing the defogging effect.

[0102] Thus, the dry cold wind outside the tower can enter the defogger 1600 through the side of the cooling tower 1000, and flow through the first flow path 1600A of the defogger 1601 and 1602 to the air mixing part 1100; the dry cold wind flowing in from the air inlet 1400 flows through the heat exchange part 1300 spraying hot water to contact with the hot water and exchange heat to form moist hot air, and the moist hot air also flows upward to the second flow path 1600B of the defogger 1601 and 1602 to the air mixing part 1100 to mix with the dry cold wind. After mixing, the moist hot air changes from a saturated state to an unsaturated state, and there is no fog when it is discharged from the cooling tower 1000, thereby achieving defogger. In this embodiment, the existing structure of the cooling tower 1000 is used, and compared with the prior art, no new fan is added, which further reduces the energy consumption of the cooling tower 1000.

[0103] In the demisting devices 1601 and 1602, when the humid hot air in the second flow path 1600B contacts the cold surface of the first flow path 1600A, condensed water droplets are formed on the surface of the second flow path 1600B. These water droplets are the result of condensation of humid hot air, which will cause a reduction in water vapor in the humid hot air. The condensed water droplets fall back to the water collection part 1500 to achieve water saving. The demisting part 1600 may include two demisting devices 1601 and 1602, and the two demisting devices 1601 and 1602 are arranged opposite to each other in the horizontal direction, and the air inlets of the dry cold air are arranged back to back. The density of the dry warm air and the humid warm air in the functional part 1630 of the demisting devices 1601 and 1602 is lower than that of the ambient air, so the dry warm air and the humid warm air in the functional part 1630 will be affected by buoyancy, which will promote the upward movement of the dry warm air and the humid warm air. The outflow direction of the dry warm air and the wet warm air is consistent with the buoyancy direction, so the buoyancy effect can be fully exerted, and the suction force required by the induced draft fan 1022 can be relatively reduced, which is conducive to reducing operating energy consumption. The sides of the mist dispersing devices 1601 and 1602 can be straight to fully utilize the space.

[0104] The demisting device 1601 of this embodiment will be described below by taking the demisting device 1601 (either one of the demisting devices 1601 and 1602) as an example.

[0105] Figure 2 and Figure 3 It is shown that the defogging device 1601 is formed by stacking a plurality of defogging sheets, and the length of the defogging device 1601 can be changed by increasing or decreasing the number of stacked defogging sheets.

[0106] The demisting device 1601 as a whole includes a first inlet 1610, a second inlet 1620, a functional part 1630, a first outlet 1640 and a second outlet 1650. The first inlet 1610 is connected to the air inlet of the side wall of the cooling tower 1000; the second inlet 1620 is connected to the space inside the tower. The first outlet 1640 and the second outlet 1650 are both connected to the air mixing part 1100. The first inlet 1610 introduces the first airflow flowing in from one side of the width direction of the demisting device 1601 into the first flow path 1600A, and the first outlet 1640 discharges the first airflow flowing out of the first flow path 1600A to the top of the demisting device 1601; the second inlet 1620 introduces the second airflow flowing in from the bottom of the demisting device 1601 into the second flow path 1600B, and the second outlet 1650 discharges the second airflow flowing out of the second flow path 1600B to the top of the demisting device 1601.

[0107] In this embodiment, a first flow outlet 1640 and a second flow outlet 1650 are stacked on the upper side of the defogging device 1601. The first flow outlet 1640 and the second flow outlet 1650 are alternately arranged, and the thickness of the first and second flow outlets 1640 and 1650 in the stacking direction of the defogging sheet is relatively thin, so that the first airflow flowing out through the first flow outlet 1640 and the second airflow flowing out through the second flow outlet 1650 can be quickly and evenly mixed, thereby enhancing the defogging effect. In this embodiment, the first flow path 1600A and the second flow path 1600B are stacked, respectively occupying approximately the full width of the defogging device 1601. Dry cold air enters the defogging device 1601, absorbs heat and heats up to become dry warm air. Moist hot air enters the defogging device 1601, releases heat and cools down to become moist warm air. The wet warm air and dry warm air outlet flow directions are consistent; the cross-sectional shape of each channel outlet is wide and thin, so the dry warm air outlet is in the form of a wide and thin wind curtain, and the wet warm air outlet is in the form of a wide and thin air curtain. It is known from the jet theory that the same flow direction and the same width of wind curtain and air curtain are easy to mix, the required mixing distance is short, the required mixing space is short, the tower height can be reduced, and costs can be saved. It can also adapt to the renovation of old towers without increasing the height, thereby reducing the difficulty of renovation of old towers. The thickness of the first flow path 1600A and the thickness of the second flow path 1600B can be consistent or inconsistent, that is, the thickness of the first flow outlet 1640 and the thickness of the second flow outlet 1650 can be consistent or inconsistent. For example, the thickness of the first flow path 1600A can be greater than the thickness of the second flow path 31600B, thereby increasing the flow of dry cold air and improving the defogging effect.

[0108] In addition, in this embodiment, the thickness of the first inlet 1610 of the defogging device 1601 is greater than or equal to the thickness of the second inlet 1620 to accommodate the dry cold air volume and the moist hot air volume. For example, in areas with lower temperatures, the thickness of the first inlet 1610 of the defogging device 1601 is greater than the thickness of the second inlet 1620, so that the dry cold air inlet is thicker, and the cold air volume is more, so as to enhance the defogging ability.

[0109] In this embodiment, a cold air introduction unit 1700 is provided on the right side of the mist removal device 1601. ， The cold air introduction part 1700 is connected to the first flow path 1600A in the mist dispelling device 1601. The cold air introduction part 1700 extends through a side wall of the cooling tower 1000 in the X direction and is connected to the outside air. Therefore, the dry cold air outside the tower can enter the first flow path 1600A of the mist dispelling device 1601 through the cold air introduction part 1700 (as shown by the dotted arrow in the figure).

[0110] In addition, the air flowing in from the air inlet section 1400 passes through the heat exchange section 1300 and the spray section 1200 from bottom to top in turn to become humid hot air, and the humid hot air continues to flow upward into the second flow path 1600B in the demisting device 1601 (as shown by the solid arrow in the figure).

[0111] The dry cold air in the first flow path 1600A and the humid hot air in the second flow path 1600B are separated by a defogger sheet, and heat is transferred through the defogger sheet, so that the humid hot air in the second flow path 1600B contacts the cold surface of the first flow path 1600A, forming condensed water droplets on the surface of the second flow path 1600B.

[0112] like Figure 2 As shown, the defogging device 1601 includes first defogging sheets A, A' and second defogging sheets B, B' which are alternately stacked and respectively limit and form a first flow path 1600A and a second flow path 1600B. Figure 2 The defogging sheet closest to the outside of the paper surface in the defogging device 1601 shown in the figure is the first defogging sheet A. The left side edge of the first defogging sheet A in the width direction is bent toward the stacked second defogging sheet B to form a first folded edge ZB1, covering the gap on the left side of the first defogging sheet A and the second defogging sheet B in the width direction. The bottom edge of the first defogging sheet A is bent toward the stacked second defogging sheet B to form a second folded edge ZB2, covering the gap at the bottom of the first defogging sheet A and the second defogging sheet B. Thus, a first flow path 1600A is formed between the first defogging sheet A and the second defogging sheet B. The two side edges of the second defogging sheet B in the width direction are bent toward the first defogging sheet A' in the stacking direction to form a third folded edge ZB3, covering the gap on both sides of the second defogging sheet B and the stacked first defogging sheet A' in the width direction, forming a second flow path 1600B between the first defogging sheet B and the second defogging sheet A'. Each defogging sheet is connected and formed in sequence.

[0113] In the functional part 1630 of the defogging device 1601, a plurality of protrusions are provided in the middle area of ​​the first defogging sheet A, A' and the second defogging sheet B, B', and the protrusions play a role in positioning, bonding and supporting the first defogging sheet A, A' and the second defogging sheet B, B'.

[0114] [Second embodiment]

[0115] This embodiment improves the demisting device in the first embodiment.

[0116] The following description will be made by taking the stacking of the first defogging sheet A and the second defogging sheet B as an example.

[0117] like Figure 4 As shown, in Figure 4 The defogging sheet closest to the outside of the paper surface in the defogging device 2601 shown in FIG. 2 is the first defogging sheet A.

[0118] Figure 5 : is a front view of the first defogging sheet A. Figure 5 As shown, the left edge of the first defogging sheet A in the width direction is offset from the plane where the substrate is located to the inside of the paper to form a deflection portion A1, and the bottom edge is offset from the plane where the substrate is located to the inside of the paper to form a deflection portion A2. In addition, a plurality of convex ribs protruding toward the outside of the paper are formed on the first defogging sheet A, and the convex ribs can extend along the height direction of the first defogging sheet A. The convex ribs located at the edges of both sides in the width direction of the first defogging sheet A are continuous long strips, and other convex ribs can be composed of a plurality of intermittently arranged strip-shaped protrusions 2631A, but are not limited thereto.

[0119] Figure 6 It is a three-dimensional diagram of the second defogging sheet B. The left edge of the second defogging sheet B in the width direction is offset from the plane where the substrate is located to the outside of the paper surface to form a deflection portion B1; and the bottom edge is offset from the plane where the substrate is located to the outside of the paper surface to form a deflection portion B2. In addition, a plurality of convex ribs protruding toward the inside of the paper surface are formed on the second defogging sheet B, and the convex ribs can extend longitudinally along the height of the second defogging sheet B. The convex ribs located at the edges of the second defogging sheet B in the width direction are continuous long strips, and other convex ribs can be composed of a plurality of intermittently arranged strip-shaped protrusions 2631B, but are not limited thereto.

[0120] Thus, a first flow path is formed between the first defogging sheet A and the second defogging sheet B; a second flow path is formed between the second defogging sheet B and the first defogging sheet A'; and a first flow path is formed again between the first defogging sheet A' and the second defogging sheet B'... Thus, the first flow path and the second flow path are alternately stacked.

[0121] Taking the first flow path formed between the first defogging sheet A and the second defogging sheet B as an example, the deflection portion A1 of the first defogging sheet A and the deflection portion B1 of the second defogging sheet B are sealed and connected to form a sealed continuous portion; the deflection portion A2 of the first defogging sheet A and the deflection portion B2 of the second defogging sheet B are sealed and connected to form a sealed continuous portion.

[0122] Taking the second flow path formed between the second defogging sheet B and the first defogging sheet A' as an example, the convex ribs of the first defogging sheet A' and the convex ribs of the second defogging sheet B are sealed and connected to form a downstream continuous portion. Preferably, the rib tops of the convex ribs of the first defogging sheet A' can be bonded to the rib tops of the convex ribs of the second defogging sheet B. Thus, a second flow path is formed between the second defogging sheet B and the first defogging sheet A'.

[0123] In addition, the convex ribs at the edge of the second defogging sheet B and the convex ribs at the edge of the first defogging sheet A' are correspondingly sealed and connected, which play the role of sealing the side and connecting the second defogging sheet B and the first defogging sheet A' to form a second flow path; the other multiple convex ribs on the second defogging sheet B and the other multiple convex ribs on the first defogging sheet A' are correspondingly sealed and connected, dividing the second flow path into multiple downstream channels, preventing the second airflow from deviating upward under the action of the induced draft fan 1022, so that the heat exchange at the edge of the second flow path away from the induced draft fan 1022 is less, so that the second airflow flows upward through the downstream channels, thereby increasing the heat exchange efficiency.

[0124] [Third embodiment]

[0125] This embodiment is a further improvement on the second embodiment, and the thickness of the first inlet in the stacking direction of the defogging sheet is increased, thereby increasing the thickness of the first inlet and reducing the flow resistance.

[0126] When stacking the defogging device, the defogging sheet A, the second defogging sheet B, the first defogging sheet A', the second defogging sheet B', . . . are stacked in this order.

[0127] like Figure 7 As shown, an introduction portion 3660 is formed on the right side in the width direction of the defogging device 3601, and a first inlet 3610 is formed at the right edge of the introduction portion 3660. An expansion structure is formed in the introduction portion 3660, and the thickness of the first inlet 3610 is increased and the flow resistance is reduced compared with the defogging device 2601 in the second embodiment.

[0128] like Figure 8 As shown, the formation method of the above-mentioned flared structure is described by taking the first defogging sheet A and the second defogging sheet B as examples. The first defogging sheet A is bent on the right side of its width direction away from the stacking direction to form a deflection portion PA. However, the deflection direction of the deflection portion PB of the second defogging sheet B on the right side of its width direction is opposite to the direction of the deflection portion PA of the first defogging sheet A. Therefore, as Figure 8As shown, a first flow path 3600A and an introduction portion 3660 communicating with the first flow path 3600A are formed between the first defogging sheet A and the second defogging sheet B. The introduction portion 3660 is formed on the right side in the width direction of the defogging device 3601. The deflection portion PB of the second defogging sheet B and the deflection portion PA of the stacked first defogging sheet A' are sealed and connected by bonding or the like to form a second flow path 3600B between the second defogging sheet B and the first defogging sheet A' on one side of the stacking direction.

[0129] It should be noted that the thickness of the first inlet 3610 may also be adjusted as needed, for example, by changing the deflection amounts of the deflection portions PA and PB, thereby adjusting the thickness of the introduction portion 3660 .

[0130] [Fourth embodiment]

[0131] This embodiment is a further improvement on the third embodiment, and changes the transition structure of the air flow through the introduction part 3660, thereby reducing the flow resistance at the transition point.

[0132] like Figure 8 As shown, the transition portion 3661 in the third embodiment is directly formed during the deflection of the deflection portion PA and the deflection portion PB. The downstream cross-section of the transition portion 3661 is roughly trapezoidal with a thick inlet and a thin outlet, and has a large flow resistance.

[0133] like Fig. 9 As shown, in this embodiment, the thickness of the transition portion 3661 through which the airflow flows gradually decreases, and the flow resistance can be appropriately reduced.

[0134] The following description will be made by taking the transition portion 3661 formed between the first defogging sheet A and the second defogging sheet B as an example.

[0135] like Fig. 9 As shown, the deflection portion PA of the first defogging sheet A forms a continuous portion 3661A during the deflection process, and the deflection portion PB of the second defogging sheet B forms a continuous portion 3661B during the deflection process, and a transition portion 3661 is formed between the continuous portion 3661A and the continuous portion 3661B. The continuous portion 3661A on the first defogging sheet A is formed to bend the substrate at least once to form a concave-convex shape, and the continuous portion 3661B on the second defogging sheet B is formed to bend the substrate at least once in a concave-convex shape in the opposite direction to the continuous portion 3661A on the first defogging sheet A.

[0136] Taking the example that the continuous portion 3661A bends the substrate once to form a concave-convex shape, in this embodiment, Fig. 9As shown, the continuous portion 3661A bends from a point on it (i.e., the bending point) toward one side of the continuous portion 3661B, and a first bending portion WA1 is formed between the bending point and the end of the continuous portion 3661A close to the introduction portion, and a second bending portion WA2 is formed between the bending point and the end of the continuous portion 3661A close to the first flow path, dividing the continuous portion 3661A into the first bending portion WA1 and the second bending portion WA2. The angle α1 between the first bending portion WA1 and the vertical plane is greater than the angle α2 between the second bending portion WA2 and the vertical plane, so that the slope of the second bending portion WA2 is reduced, the difficulty of airflow passing is reduced, and the flow resistance is reduced. Correspondingly, the continuous portion 3661B bends from a point (bending point) on it toward the side of the continuous portion 3661A, and a first bending portion WB1 is formed between the bending point and one end of the continuous portion 3661B close to the introduction portion 3660, and a second bending portion WB2 is formed between the bending point and one end of the continuous portion 3661B close to the first flow path 3600A. Along the stacking direction of the demisting device 3601, the thickness between the bending point on the continuous portion 3661A and the bending point on the continuous portion 3661B should be greater than the thickness of the flow path in the stacking direction, but less than the thickness of the inlet in the stacking direction. The continuous portion 3661B is divided into the first bending portion WB1 and the second bending portion WB2, and the continuous portion 3661B is matched to reduce the flow resistance of the airflow through the transition portion 3661. The continuous portion 3661A can also be bent away from the continuous portion 3661B or bent in alternating directions, as long as the thickness of the bending points on the continuous portion 3661A and the bending points on the continuous portion 3661B in the stacking direction is greater than the thickness of the flow path in the stacking direction, but less than the thickness of the inlet in the stacking direction.

[0137] It should be noted that the lengths of the first bending portions WA1, WB1 and the second bending portions WA2, WB2 can be adjusted as needed. For example, when the continuous portion 3661A is bent toward the continuous portion 3661B, the lengths of the first bending portions WA1, WB1 are made smaller than the corresponding lengths of the second bending portions WA2, WB2, so that the airflow enters the flow path more smoothly from the inlet portion 3660 through the transition portion 3661 to reduce the flow resistance.

[0138] Similarly, when the continuous portion 3661A is formed by n (n>1) times of bending, n bending points are formed on the continuous portion 3661A, dividing the continuous portion 3661A into n+1 parts, and the slope of the n+1 part gradually decreases from the upstream to the downstream of the airflow; correspondingly, n bending points are formed on the continuous portion 3661B, dividing the continuous portion 3661B into n+1 parts, and the bending direction of the n+1 part is opposite to that of the continuous portion 3661A, and the slope of the n+1 part also gradually decreases from the upstream to the downstream of the airflow, which cooperates with the continuous portion 3661A to reduce the flow resistance. The thickness of each bending point on the continuous portion 3661A and the corresponding bending point on the continuous portion 3661B in the stacking direction should be greater than the thickness of the flow path in the stacking direction, but less than the thickness of the inlet in the stacking direction.

[0139] In addition, the continuous portions 3661A and 3661B should not be bent too many times to prevent the transition zone from being too long, which would lead to a reduction in the area of ​​the second flow path 3600B and further reduce the heat exchange area of ​​the demisting device 3601 .

[0140] [Fifth embodiment]

[0141] In the demisting device of the above-mentioned embodiment, since the airflow has the characteristic of "taking a shortcut", the airflow is easy to directly short-circuit upward at a position close to the first inlet, resulting in less airflow flowing through a position in the first flow path far away from the first inlet, thereby relatively reducing the heat exchange efficiency between the first airflow in the first flow path and the second airflow in the second flow path.

[0142] To solve the above technical problems, Fig.10 As shown, in this embodiment, the thickness of the first flow outlet 4640 gradually increases from one edge to the other edge in the width direction of the mist elimination device 4601, and the flow resistance gradually decreases.

[0143] Specifically, taking the stacked first defogging sheet A and the second defogging sheet B as an example, the top edge of the first defogging sheet A is bent from the plane where the substrate is located toward the stacked second defogging sheet B to form the first sealing portion FK1, and the second defogging sheet B is bent away from the stacking direction to form the second sealing portion FK2, and the first flow outlet 4640 is formed between the first sealing portion FK1 and the second sealing portion FK2. The bending amount of the first and second sealing portions FK1 and FK2 close to the first flow inlet 4610 is large, and the thickness of the first flow outlet 4640 formed is small, and the flow resistance is large; the bending amount of the first and second sealing portions FK1 and FK2 away from the first flow inlet 4610 is small, and the thickness of the first flow outlet 4640 formed is large, thereby making the dry cold air flowing in through the first flow inlet 4610 more evenly distributed in the first flow path, further improving the heat exchange efficiency of the defogging device 4601. The cross-sectional shape of the first and second sealing portions FK1 and FK2 can be roughly triangular or roughly trapezoidal.

[0144] [Sixth embodiment]

[0145] In the demisting devices of the first to fifth embodiments, since the airflow has the characteristic of "taking a shortcut", the airflow is prone to directly short-circuit upward at a position close to the first inlet, resulting in less airflow flowing through the position of the first flow path away from the first inlet and the lower part of the demisting device, which relatively reduces the heat exchange efficiency between the first airflow in the first flow path and the second airflow in the second flow path.

[0146] To solve the above technical problems, Figures 11 to 15 As shown, in this embodiment, a guide structure is formed in the demisting device 5601 to guide the first airflow to approximately the entire width of the demisting device 5601.

[0147] like Fig.11 As shown, a first guide structure extending from the first inlet 5610 to the bottom of the first flow path 5600A is formed in the first flow path 5600A. The first guide structure is composed of a plurality of first guide ridges, and a flow channel for airflow is formed between two adjacent first guide ridges.

[0148] The composition structure of the first flow guiding structure is described below. Fig.12 and Fig.13 As shown, if viewed from the front direction of the first defogging sheet A, a plurality of first guide ribs 5632A protruding toward one side of the stacking direction are formed on the surface of the first defogging sheet A, and the first end of the first guide rib 5632A extends toward the bottom area of ​​the first defogging sheet A, and the second end extends obliquely to the upper right; the plurality of first guide ribs 5632A are arranged intermittently. Preferably, the first guide ribs 5632 are formed in a strip shape. Viewed from the front direction of the second defogging sheet B, a plurality of first guide ribs 5632B protruding toward one side of the first defogging sheet A are formed on the surface of the second defogging sheet B, and the first end of the first guide rib 5632B extends toward the bottom area of ​​the second defogging sheet B, and the second end extends obliquely to the upper right; the plurality of first guide ribs 5632B are arranged intermittently. Preferably, the first guide ribs 5632B are formed in a strip shape. The first guide rib 5632A and the first guide rib 5632B are arranged in one-to-one correspondence, and the rib top of the first guide rib 5632A and the rib top of the first guide rib 5632B are sealed against each other. Preferably, the rib top of the first guide rib 5632A and the rib top of the first guide rib 5632B can be bonded to form a first guide rib portion. Thus, in the first flow path, a plurality of intermittent first guide ribs 5632A, 5632B can block the airflow from directly short-circuiting upward from the first inlet 5610, and guide the airflow downward to the bottom area of ​​the first flow path 5600A, which on the one hand increases the heat exchange efficiency of the lower part of the defogging device 5601, and on the other hand avoids the airflow from short-circuiting upward and guides the airflow into the first flow path 5600A.

[0149] In addition, such as Fig.11 As shown, a second flow guide structure is formed in the first flow path, and the second flow guide structure includes a plurality of second flow guide ridges arranged in sequence, and the second flow guide ridges divide the upper part of the defogging device into a plurality of independent flow guide chambers, and the plurality of flow guide chambers occupy approximately the full width of the defogging device. The shape of the cross section of the second flow guide ridge parallel to the plane where the defogging device is located is approximately V-shaped, and the opening of the V-shape faces away from the first inlet 5610. The V-shaped inner angle β gradually increases from one side close to the first inlet 5610 to the other side, and the resistance gradually decreases. The V-shaped inner angle β of the second flow guide ridge close to the right side of the defogging device 5601 is small, and the flow resistance is large; the V-shaped inner angle β of the second flow guide ridge far from the right side of the defogging device 5601 is large, and the flow resistance is small.

[0150] The second flow guide ridge portion is described below. Fig.12 and Fig.13 As shown, a plurality of second flow-guiding ribs 5633A protruding to one side are formed on the surface of the upper area of ​​the first defogging sheet A. A second flow-guiding rib 5633B protruding to one side and corresponding to the second flow-guiding rib 5633A is formed on the surface of the upper area of ​​the second defogging sheet B. The second flow-guiding rib 5633A corresponds to the second flow-guiding rib 5633B one by one, and the rib tops of the two are sealed against each other. Preferably, the rib tops of the second flow-guiding rib 5633A and the rib tops of the second flow-guiding rib 5633B can be bonded to form a second flow-guiding rib portion, thereby forming a plurality of independent flow-guiding cavities.

[0151] Specifically, Fig.14 As shown, if viewed from the back of the first defogging sheet A, the second guide rib 5633A protrudes outward from the paper surface, and the plurality of second guide ribs 5633A include a first guide segment 5634A and a second guide segment 5635A. The first end of the first guide segment 5634A is connected to the first end of the second guide segment 5635A, and the second end extends to the upper right until it extends to the upper edge of the first defogging sheet A; the second end of the second guide segment 5635A extends to the lower right. Similarly, if viewed from the front of the second defogging sheet B, as shown Fig.15As shown, the second guide rib 5633B protrudes outward from the paper surface, and the plurality of second guide ribs 5633B include a first guide segment 5634B and a second guide segment 5635B. The first end of the first guide segment 5634B is connected to the first end of the second guide segment 5635B, and the second end extends to the upper left until it extends to the upper edge of the second fog eliminating sheet B; the second end of the second guide segment 5635B extends to the lower left. The first guide segment 5634A in the second guide rib 5633A corresponds to the first guide segment 5634B in the second guide rib 5633B, and the rib tops of the two are sealed against each other; the second guide segment 5635A in the second guide rib 5633A corresponds to the second guide segment 5635B in the second guide rib 5633B, and the rib tops of the two are sealed against each other. Preferably, the rib tops of the first guide segment 5634A and the first guide segment 5634B can be bonded, and the rib tops of the second guide segment 5635A and the second guide segment 5635B can be bonded to form a second guide ridge portion, thereby forming a plurality of independent guide cavities.

[0152] The top of the guide cavity formed between the plurality of second guide ribs is formed with a guide groove 5636 for the first airflow to pass through, and the rib spacing of the plurality of guide grooves 5636 gradually increases from one side close to the first inlet 5610 to the other side. The rib spacing of the guide groove 5636 close to the right side of the defogging device 5601 is small, and the flow resistance is large; the rib spacing of the guide groove 5636 far from the right side of the defogging device 5601 is large, and the flow resistance is small, thereby making the airflow flowing out through the plurality of guide grooves 5636 more uniform, further improving the defogging effect of the defogging device 5601.

[0153] In addition, a third flow guide structure extending from the first inlet 5610 into the first flow path is formed in the first flow path. The third flow guide structure is formed as follows: a third flow guide rib 5637A protruding toward the second defogging sheet B is formed on the surface of the first defogging sheet A near the first inlet 5610, and a third flow guide rib 5637B protruding toward the first defogging sheet A is formed on the surface of the second defogging sheet B. The rib top of the third flow guide rib 5637A and the rib top of the third flow guide rib 5637B are sealed against each other to form a third flow guide rib portion. Preferably, the rib top of the third flow guide rib 5637A and the rib top of the third flow guide rib 5637B can be bonded to form a third flow guide structure. The third flow guide structure is formed at the upper right corner of the first flow path, one end of which extends to the first inlet 5610, and the other end forms a flow passage 5670 for airflow between the second flow guide rib portion near the first inlet 5610. Thus, the third flow guiding structure can block the first airflow from directly short-circuiting upward from the first inlet 5610, and on the one hand, guide part of the airflow through the above-mentioned circulation channel 5670 to the upper right corner of the first flow path, thereby delaying the outflow of the airflow and enhancing the heat exchange efficiency at the corners of the defogging device 5601, and on the other hand, cooperate with the first flow guiding structure to guide the airflow downward to the bottom area of ​​the first flow path, thereby increasing the heat exchange efficiency of the lower part of the defogging device 5601. Preferably, the third flow guiding ribs 5637A and 5637B are formed in an arc shape to facilitate guiding the airflow. A plurality of diverter ridges are provided between the third flow guide structure and the second flow guide ridge near the first inlet 5610. The diverter ridges are formed such that the first defogging sheet A protrudes toward one side of the stacking direction to form a plurality of diverter sections 5638A, and the second defogging sheet B protrudes toward the side opposite to the stacking direction to form a plurality of diverter sections 5638B. The top ends of the diverter sections 5638A on the first defogging sheet A and the diverter sections 5638B on the second defogging sheet B are sealed against each other. Preferably, the protruding side surface of the diverter section 5638A and the protruding side surface of the diverter section 5638B are bonded to form a plurality of diverter ridges, thereby guiding the airflow entering through the above-mentioned circulation channel 5670 to be evenly distributed at the corners of the defogging device 5601, thereby further improving the heat exchange efficiency.

[0154] In addition, in the defogging device of this embodiment, a fourth flow guide structure is provided at the edge of the first flow path 5600A away from the first inlet 5610. The fourth flow guide structure is formed as follows: a fourth flow guide rib 5639A protruding to one side is formed on the surface of the first defogging sheet A away from the first inlet 5610, and a fourth flow guide rib 5639B protruding to one side of the first defogging sheet A is formed on the surface of the second defogging sheet B. The rib top of the fourth flow guide rib 5639A and the rib top of the fourth flow guide rib 5639B are sealed against each other to form a fourth flow guide rib portion. Preferably, the rib top of the fourth flow guide rib 5639A and the rib top of the fourth flow guide rib 5639B can be bonded to form a fourth flow guide structure. Preferably, the fourth flow guide ribs 5639A and 5639B are formed in an arc shape to facilitate airflow diversion.

[0155] Thus, the first airflow flows in through the first inlet 5610, and under the obstruction of the third guide structure and the guidance of the first guide structure, the airflow moves downward, and part of the airflow is guided to the corner area through the above-mentioned circulation channel 5670 for heat exchange; the second guide ridge in the second guide structure obstructs the airflow and generates turbulence, so that the airflow is evenly discharged from the outlet through a curved path, which is beneficial to the uniform heat exchange of the airflow in the demisting device 5601.

[0156] [Seventh embodiment]

[0157] like Fig.16 As shown, this embodiment is further improved on the basis of the cooling tower in the first embodiment.

[0158] In this embodiment, all the nozzles 6211 in the spray section 6200 are opened, so that the heat exchange section can have a higher heat exchange area while saving water and eliminating mist.

[0159] In this embodiment, if Fig.16 As shown, the two groups of demisting devices 6601 and 6602 are closely spliced, and correspondingly, the cold air introduction part 6700 includes two groups, which are arranged on the other side of the two groups of demisting devices 6601 and 6602. The demisting devices 6601 and 6602 are closely connected, without any gaps, with a large heat exchange area and high space utilization. A first valve 6701 is provided at the cold air introduction part 6700, and the first valve 6701 can be a shutter. By adjusting the opening and closing of the shutter, the working mode of the cooling tower 6000 can be adjusted.

[0160] In winter, the cooling tower 6000 turns on the water-saving and demisting mode, that is, the first valve 6701 is opened, and the dry cold air outside the tower flows into the first flow path of the demisting devices 6601 and 6602 from the cold air inlet part 6700, and the moist hot air after spraying enters the second flow path from the bottom of the demisting devices 6601 and 6602. The dry cold air in the first flow path and the moist hot air in the second flow path are separated by the demisting plates, and heat is exchanged through the wall of the demisting plates, so that the moist hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 6601 and 6602, absorbs heat and heats up to become dry warm air, and the moist hot air enters the demisting devices 6601 and 6602, releases heat and cools down to become moist warm air, and the dry warm air and the moist warm air flow out of the demisting devices 6601 and 6602 to the top to mix, thereby achieving demisting.

[0161] In summer, the cooling tower is turned on in the maximum heat dissipation mode and does not need to defog, that is, the first valve 6701 is closed; in the maximum heat dissipation mode, the second flow path of the defogger 6601 and 6602 is used to circulate the moist hot air. Under the same energy consumption of the induced draft fan 6022, more air flow is drawn, thereby improving the cooling efficiency of the tower.

[0162] [Eighth Implementation Method]

[0163] The present embodiment further improves the cooling tower 6000 in the seventh embodiment, increases the flow of moist hot air in the cooling tower 6000 when demisting is not required, and reduces flow resistance.

[0164] In this embodiment, if Fig.17 As shown, a second valve 6702 is provided between the two groups of mist elimination devices 6601 and 6602. The second valve 6702 may be a shutter installed approximately at the center of the cooling tower 6000. By adjusting the opening and closing of the shutter, the working mode of the cooling tower 6000 can be adjusted.

[0165] In winter, the cooling tower 6000 turns on the water-saving and demisting mode, that is, the second valve 6702 is closed and the first valve 6701 is opened; the dry cold air outside the tower flows into the first flow path of the demisting devices 6601 and 6602 from the cold air inlet part 6700, and the moist hot air after spraying flows into the second flow path from the bottom of the demisting devices 6601 and 6602 to the greatest extent. The dry cold air in the first flow path and the moist hot air in the second flow path are separated by the demisting plate, and heat is exchanged through the wall of the demisting plate, so that the moist hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 6601 and 6602, absorbs heat and heats up to become dry warm air, and the moist hot air enters the demisting devices 6601 and 6602, releases heat and cools down to become moist warm air, and the dry warm air and the moist warm air flow out of the demisting devices 6601 and 6602 to the top to mix, thereby achieving demisting.

[0166] In summer, the cooling tower 6000 turns on the maximum heat dissipation mode, that is, opens the second valve 6702 and closes the first valve 6701; in the maximum heat dissipation mode, the hot and humid gas channel C and the second flow path of the defogger 6601 are both used to circulate the hot and humid gas, thereby reducing the hot and humid gas circulation resistance of the defogger part and improving the cooling efficiency of the tower.

[0167] [Ninth embodiment]

[0168] This embodiment further improves the cooling tower 1000 in the first embodiment, increases the flow of moist hot air in the cooling tower 1000 when demisting is not required, and reduces flow resistance.

[0169] In this embodiment, if Fig.18 As shown, the cold air inlet part 7700 includes two groups, which are arranged on the left and right sides of the two groups of demisting devices 7601 and 7602. The cold air inlet part 7700 includes a third valve 7703. By adjusting the open / closed state of the third valve 7703, the working mode of the cooling tower 7000 can be adjusted.

[0170] Specifically, the third valve 7703 can be arranged at the inlet of the dry cold air of the cooling tower 7000, for example, installed on the side wall of the air chamber of the cooling tower 7000, and the cold air introduction part 7700 can be connected or cut off with the external air through the third valve 7703. The air chamber of the cooling tower 7000 includes the tower space above the water collector and below the exhaust part.

[0171] In winter, the cooling tower 7000 turns on the water-saving and demisting mode, that is, the third valve 7703 is opened, and the dry cold air outside the tower flows into the first flow path of the demisting devices 7601 and 7602 from the dry cold air channel D, and the dry cold air in the first flow path and the humid hot air in the second flow path are separated by the demisting sheet, and heat is exchanged through the demisting sheet, so that the humid hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 7601 and 7602, absorbs heat and rises to become dry warm air, and the humid hot air enters the demisting devices 7601 and 7602, releases heat and cools down to become humid warm air, and the dry warm air and the humid warm air flow out from the demisting devices 7601 and 7602 to the top and mix, thereby achieving demisting.

[0172] like Fig.19 As shown, in summer, the cooling tower 7000 turns on the maximum heat dissipation mode, that is, the third valve 7703 is closed. In the maximum heat dissipation mode, the second flow path of the defogger 7601 and 7602 and the hot and humid gas channel E are used to circulate the hot and humid gas, thereby reducing the hot and humid gas circulation resistance of the defogger part and improving the cooling efficiency of the tower.

[0173] The third valve 7703 includes a first valve plate 7703A and a second valve plate 7703B, wherein the fixed end of the first valve plate 7703A is pivotally connected to one side wall of the cold air inlet 7700, and the fixed end of the second valve plate 7703B is pivotally connected to the other side wall of the cold air inlet 7700. When the third valve 7703 is opened, the free end of the first valve plate 7703A and the free end of the second valve plate 7703B are connected to the demisting device 7601, and a dry cold air channel D is formed between the first valve plate 7703A and the second valve plate 7703B, and the wet hot air channel E is closed to block the wet hot air at the first and second valve plates 7703A and 7703B from flowing upward. When the third valve 7703 is closed, the wet hot air channel E between the first valve plate 7703A and the second valve plate 7703B is connected, and the wet hot air can flow upward.

[0174] In addition, the width of the first valve plate 7703A is the same as the width of the second valve plate 7703B, and the widths of the two valve plates may be the same as or different from the height of the cold air introduction portion 7700. When the widths of the first and second valve plates 7703A and 7703B are the same as the height of the cold air inlet portion 7700, and the initial state is that the first valve plate 7703A blocks the cold air inlet portion 7700, flip the first valve plate 7703A upwards and flip the second valve plate 7703B upwards to open the third valve 7703; then flip the first valve plate 7703A downwards and flip the second valve plate 7703B downwards to close the third valve 7703; when the initial state is that the second valve plate 7703B blocks the cold air inlet portion 7700, flip the second valve plate 7703B downwards and flip the first valve plate 7703A downwards to open the third valve 7703, then flip the second valve plate 7703B upwards and flip the first valve plate 7703A upwards to close the third valve 7703. When the width of the first and second valve plates 7703A and 7703B is different from the height of the cold air inlet portion 7700, the width of the first and second valve plates 7703A and 7703B each occupies half of the height of the cold air inlet portion 7700. The third valve 7703 can be closed by flipping the first and second valve plates 7703A and 7703B toward each other; the third valve 7703 can be opened by flipping the first and second valve plates 7703A and 7703B away from each other.

[0175] [Tenth embodiment]

[0176] This embodiment further improves the cooling tower 1000 in the first embodiment, increases the flow of moist hot air in the cooling tower 1000 when demisting is not required, and reduces flow resistance.

[0177] In this embodiment, if Fig. 20 As shown, the cold air inlet part 8700 includes two groups, which are arranged on the left and right sides of the two groups of demisting devices 8601 and 8602 respectively.

[0178] An extension part 8704 is provided on the side wall of the cooling tower 8000 at the cold air inlet part 8700. The extension part 8704 is hollow inside and is roughly a rectangular frame. A module moving space F is formed inside the extension part 8704, and the module moving space F extends to the length direction of the entire defogging device 8601, 8602. A fourth valve 8705 is provided on the side of the extension part 8704 facing away from the space inside the cooling tower 8000. By adjusting the open / closed state of the fourth valve 8705, the working mode of the cooling tower 8000 can be adjusted. A sliding device is provided at the bottom of the defogging device 8601, 8602, so that the defogging device 8601, 8602 can move back and forth as a whole along the left and right directions of the cooling tower 8000. The above-mentioned sliding device can be any other device that cooperates with a roller slide rail or a slider slide rail.

[0179] In winter, the cooling tower 8000 turns on the water-saving and demisting mode, that is, the fourth valve 8705 is opened, and the dry cold air outside the tower flows into the first flow path of the demisting devices 8601 and 8602 from the module moving space F, and the dry cold air in the first flow path and the humid hot air in the second flow path are separated by the demisting sheet, and heat is exchanged through the demisting sheet, so that the humid hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 8601 and 8602, absorbs heat and rises to become dry warm air, and the humid hot air enters the demisting devices 8601 and 8602, releases heat and cools down to become humid warm air, and the dry warm air and the humid warm air flow out from the demisting devices 8601 and 8602 to the top and mix, thereby achieving demisting.

[0180] In summer, the cooling tower 8000 is turned on in the maximum heat dissipation mode, and the defogger 8601 is pulled out to the right to a certain distance in the module moving space F, and / or the defogger 8602 is pulled out to the left to a certain distance in the module moving space F, so that the channel for the hot and humid air to flow between the middle part of the cooling tower 8000, i.e., the two groups of defoggers 8601 and 8602, can be expanded, thereby reducing the flow resistance. After the defoggers 8601 and 8602 are pulled to the module moving spaces F on both sides, the fourth valve 8705 can be closed to cut off the inflow of outside air, so that more air flow can be sucked under the same energy consumption of the induced draft fan, thereby improving the cooling efficiency of the tower.

[0181] Specifically, the fourth valve 8705 may be a shutter, and the working mode of the cooling tower can be adjusted by opening and closing the shutter.

[0182] [Eleventh embodiment]

[0183] In the ninth embodiment, the middle of the two groups of mist dispersing devices 7601 and 7602 are spliced, and only the third valves 7703 on both sides and the second flow path of the mist dispersing device 7601 flow the moist hot air. However, due to the characteristic of air flow of "taking a shortcut", Fig.18The diagram shows the distribution of the air flow field in the cooling tower. The air velocity in the area within the dotted line is higher and the air volume is larger. The area within the dotted line is the efficient flow path G, and the area outside the dotted line is the inefficient flow path. Fig.19 When the third valve 7703 is closed, the hot and humid airflow flows less in the inefficient flow path, which relatively reduces the cooling efficiency of the cooling tower.

[0184] In this embodiment, if Fig.21 As shown, the side wall of the cooling tower is provided with an extension part 7704 at the cold air inlet part 7700, and the interior of the extension part 7704 is hollow and roughly a rectangular frame; a module moving space F is formed inside the extension part 7704, and the module moving space F extends to the length direction of the entire demisting device 7601, 7602. A sliding device is provided at the bottom of the demisting device 7601, 7602, so that the demisting device 7601, 7602 as a whole can move back and forth along the left and right directions of the cooling tower. The above-mentioned sliding device can be any other device that cooperates with a roller slide rail or a slider slide rail. In addition, a fourth valve 7705 is provided on the side of the extension part 7704 facing away from the space inside the cooling tower, and the fourth valve 7705 can be a shutter. By adjusting the opening and closing of the shutter, the working mode of the cooling tower is adjusted.

[0185] In winter, the cooling tower turns on the water-saving and demisting mode, that is, the third valve 7703 and the fourth valve 7705 are opened, and the dry cold air outside the tower flows into the first flow path of the demisting devices 7601 and 7602 through the module moving space F and the dry cold air channel D. The dry cold air in the first flow path and the moist hot air in the second flow path are separated by the demisting sheet, and heat is exchanged through the demisting sheet, so that the moist hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 7601 and 7602, absorbs heat and rises to become dry warm air, and the moist hot air enters the demisting devices 7601 and 7602, releases heat and cools down to become moist warm air, and the dry warm air and the moist warm air flow out of the demisting devices 7601 and 7602 to the top and mix, thereby achieving demisting.

[0186] In summer, the cooling tower is turned on the maximum heat dissipation mode, and the demisting device 7601 is pulled out to the right through the dry cold air channel D to a distance in the module moving space F, and / or the demisting device 7602 is pulled out to the left side of the module moving space F for a distance, so that the channel for the hot and humid air in the middle part of the cooling tower can be expanded, reducing the flow resistance. At the same time, the first valve plate 7703A can be turned upward, and the second valve plate 7703B can be turned downward to open the hot and humid air channel E, which does not hinder the demisting devices 7601 and 7602 from sliding out and does not block the second flow path of the demisting devices 7601 and 7602 located in the hot and humid air channel E. It can also circulate hot and humid air, further expanding the hot and humid air circulation channel and improving the cooling efficiency of the tower. After the demisting devices 7601 and 7602 are pulled to the module moving spaces F on both sides respectively, the fourth valve 7705 can be closed to cut off the inflow of outside air. Under the same energy consumption of the induced draft fan, more air volume can be sucked, thereby improving the cooling efficiency of the tower.

[0187] [Twelfth embodiment]

[0188] In the ninth embodiment, the middle of the two groups of mist dispersing devices 7601 and 7602 are spliced, and only the third valves 7703 on both sides and the second flow paths of the mist dispersing devices 7601 and 7602 flow the moist hot air. However, due to the characteristic of air flow of "taking a shortcut", Fig. 22 The air flow field distribution in the cooling tower is shown. The air velocity in the area within the dotted line is high and the air volume is large. The area within the dotted line is the efficient flow path G, and the area outside the dotted line is the inefficient flow path. When the third valve 7703 is closed, the humid hot air flow flows less in the inefficient flow path, which relatively reduces the cooling efficiency of the cooling tower.

[0189] To solve the above technical problems, Fig. 22 As shown, in this embodiment, a second valve 7702 is provided between the two groups of defogging devices 7601 and 7602. The second valve 7702 may be a shutter installed at the approximate center of the cooling tower. By adjusting the open / closed state of the shutter, the working mode of the cooling tower can be adjusted. The above-mentioned addition of the second valve 7702 requires adaptive adjustment of the width of the defogging devices 7601 and 7602 to achieve this.

[0190] In winter, the cooling tower turns on the water-saving and demisting mode, that is, the second valve 7702 is closed and the third valve 7703 is opened; the dry cold air outside the tower flows into the first flow path of the demisting device 7601 from the cold air inlet part 7700, and the moist hot air after spraying flows into the second flow path from the bottom of the demisting devices 7601 and 7602 to the greatest extent. The dry cold air in the first flow path and the moist hot air in the second flow path are separated by the demisting sheet, and heat is exchanged through the demisting sheet, so that the moist hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 7601 and 7602, absorbs heat and heats up to become dry warm air, and the moist hot air enters the demisting devices 7601 and 7602, releases heat and cools down to become moist warm air, and the dry warm air and the moist warm air flow out from the demisting devices 7601 and 7602 to the top to mix, thereby achieving demisting.

[0191] In summer, the cooling tower is turned on the maximum heat dissipation mode, that is, the second valve 7702 is opened and the third valve 7703 is closed; in the maximum heat dissipation mode, the hot and humid gas channel C, the hot and humid gas channel E and the second flow paths of the defogger 7601 and 7602 are all used to circulate the hot and humid gas, while improving the circulation of the hot and humid gas on the high-efficiency flow path G and the low-efficiency flow path, reducing the hot and humid gas circulation resistance of the defogger, and improving the cooling efficiency of the tower.

[0192] [Thirteenth embodiment]

[0193] This embodiment further improves the cooling tower in the tenth embodiment, further increases the circulation of moist hot air in the middle of the cooling tower when defogger is not required, and reduces flow resistance.

[0194] In this embodiment, if Fig.23 As shown, a second valve 8702 is provided between the two groups of mist elimination devices 8601 and 8602. The second valve 8702 may be a shutter installed approximately at the center of the cooling tower. The operating mode of the cooling tower can be adjusted by adjusting the opening and closing of the shutter.

[0195] In winter, the cooling tower turns on the water-saving and demisting mode, that is, the second valve 8702 is closed and the fourth valve 8705 is opened; the dry cold air outside the tower flows into the first flow path of the demisting devices 8601 and 8602 from the module moving space F, and the moist hot air after spraying flows into the second flow path from the bottom of the demisting devices 8601 and 8602 to the greatest extent. The dry cold air in the first flow path and the moist hot air in the second flow path are separated by the demisting sheet, and heat is exchanged through the demisting sheet, so that the moist hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 8601 and 8602, absorbs heat and heats up to become dry warm air, and the moist hot air enters the demisting devices 8601 and 8602, releases heat and cools down to become moist warm air, and the dry warm air and the moist warm air flow out of the demisting devices 8601 and 8602 to the top to mix, thereby achieving demisting.

[0196] In summer, the cooling tower is turned on in the maximum heat dissipation mode, that is, the second valve 8702 is opened, the defogging device 8601 is pulled out to the right to a certain distance in the module moving space F, and / or the defogging device 8602 is pulled out to the left to a certain distance in the module moving space F, so that the hot and humid air channel C in the middle part of the cooling tower can be expanded to reduce the flow resistance; in the maximum heat dissipation mode, the hot and humid air channel C, the second flow path of the defogging devices 8601 and 8602, and the expanded channel are all used to circulate the hot and humid air, thereby reducing the hot and humid air flow resistance of the defogging part and improving the cooling efficiency of the tower. In addition, the fourth valve 8705 can be closed after the defogging devices 8601 and 8602 are pulled to the module moving spaces F on both sides respectively, to cut off the flow of outside air into the first flow path, so that more air flow can be sucked under the same energy consumption of the induced draft fan, thereby improving the cooling efficiency of the tower.

[0197] [Fourteenth embodiment]

[0198] In the twelfth embodiment, the third valve 7703 occupies the path of the high-efficiency flow path G. When the cooling tower is in the heat dissipation mode in summer, the amount of hot and humid air flowing through the high-efficiency flow path G is reduced, which is relatively unfavorable for the cooling of the cooling tower.

[0199] In order to solve the above technical problems, in this implementation, Fig.24 As shown, the side wall of the cooling tower is provided with an extension part 7704 at the cold air inlet part 7700, and the interior of the extension part 7704 is hollow and roughly a rectangular frame; a module moving space F is formed inside the extension part 7704, and the module moving space F extends to the length direction of the entire demisting device 7601, 7602. A sliding device is provided at the bottom of the demisting device 7601, 7602, so that the demisting device 7601, 7602 as a whole can move back and forth along the left and right directions of the cooling tower. The above-mentioned sliding device can be any other device that cooperates with a roller slide rail or a slider slide rail. In addition, a fourth valve 7705 is provided on the side of the extension part 7704 facing away from the space inside the cooling tower, and the fourth valve 7705 can be a shutter. By adjusting the opening and closing of the shutter, the working mode of the cooling tower is adjusted.

[0200] In winter, the cooling tower turns on the water-saving and demisting mode, that is, the second valve 7702 is closed, and the third valve 7703 and the fourth valve 7705 are opened. The dry cold air outside the tower flows into the first flow path of the demisting devices 7601 and 7602 from the module moving space F and the dry cold air channel D. The dry cold air in the first flow path and the moist hot air in the second flow path are separated by the demisting sheet, and heat is exchanged through the demisting sheet, so that the moist hot air in the second flow path contacts the cold surface of the first flow path, and condensed water droplets are formed on the surface of the second flow path, thereby achieving water saving; the dry cold air enters the demisting devices 7601 and 7602, absorbs heat and rises to become dry warm air, and the moist hot air enters the demisting devices 7601 and 7602, releases heat and cools down to become moist warm air, and the dry warm air and the moist warm air flow out of the demisting devices 7601 and 7602 to the top and mix, thereby achieving demisting.

[0201] In summer, if Fig.25 As shown, the cooling tower is turned on the maximum heat dissipation mode, and the demisting device 7701 is pulled out to the right through the dry cold air channel D to a distance in the module moving space F, and / or the demisting device 7702 is pulled out to the left to a distance in the module moving space F, so that the channel for the hot and humid air in the middle part of the cooling tower can be expanded, reducing the flow resistance. At the same time, the first valve plate 7703A can be turned upward, and the second valve plate 7703B can be turned downward to open the hot and humid air channel E, which does not hinder the demisting devices 7601 and 7602 from sliding out and does not block the second flow path of the demisting devices 7601 and 7602 located in the hot and humid air channel E from flowing hot and humid air, further expanding the hot and humid air circulation channel and improving the cooling efficiency of the tower.

[0202] After the mist elimination devices 7601 and 7602 are pulled to the module moving spaces F on both sides respectively, the fourth valve 7705 can be closed to cut off the inflow of outside air. Under the same energy consumption of the induced draft fan, more air flow can be sucked, thereby improving the cooling efficiency of the tower.

Claims

1. A defogging device, characterized in that: include: The stacked first flow path and the second flow path perform heat exchange between the first airflow and the second airflow; Introducing a first airflow flowing in from one side in the width direction of the mist dispelling device into a first inlet of the first flow path; Introducing a second airflow flowing in from the bottom of the mist dispelling device into a second inlet of the second flow path; discharging the first airflow flowing out of the first flow path to a first flow outlet above the mist elimination device; discharging the second airflow flowing out of the second flow path to a second flow outlet above the mist dispelling device; The first outflow outlet and the second outflow outlet are alternately stacked, and the first outflow outlet and the second outflow outlet are both located above the mist elimination device and are arranged in parallel; The width of the first outflow port is the same as the width of the demisting device, and the width of the second outflow port is the same as the width of the demisting device; The defogging device comprises a first defogging sheet and a second defogging sheet which limit and form the first and second flow paths, wherein the first defogging sheet and the second defogging sheet extend longitudinally and are alternately stacked.

2. The defogging device according to claim 1, characterized in that: The thickness of the first outflow port gradually increases from one side edge of the mist dispelling device in the width direction to the other side.

3. The defogging device according to claim 1, characterized in that: The height of the first inlet is the same as the height of the demisting device, and the width of the second inlet is the same as the width of the demisting device.

4. The defogging device according to claim 1, characterized in that: The thickness of the first inlet is equal to or greater than the thickness of the second inlet.

5. The defogging device according to claim 1, characterized in that: In the second flow path, a plurality of downstream connection parts are formed on the demisting device; the plurality of downstream connection parts divide the second flow path into a plurality of downstream channels, and the plurality of downstream channels occupy the full width of the demisting device.

6. The mist elimination device according to claim 4, characterized in that: An introduction portion communicating with the first flow path is formed on one side in the width direction of the mist removing device.

7. The defogging device according to claim 6, characterized in that: The thickness of the inlet of the introduction portion is greater than the thickness of the outlet of the introduction portion.

8. The mist elimination device according to claim 6, characterized in that: A transition portion is formed between the introduction portion and the first flow path.

9. The mist dissipation device according to claim 8, characterized in that: The thickness of the transition portion gradually decreases from the inlet to the outlet.

10. The mist elimination device according to claim 8, characterized in that: The thickness of the transition portion inlet is greater than the thickness of the first flow path inlet, and the thickness of the transition portion outlet is smaller than the thickness of the introduction portion outlet.

11. The mist elimination device according to claim 8, characterized in that: The first and second defogging sheets have continuous portions formed thereon, which are folded from the outflow port of the introduction portion toward directions facing each other.

12. The mist elimination device according to claim 11, characterized in that: At least one bending point is formed on the continuous portion, and in the transition portion, the thickness between the bending point on the first defogging sheet and the corresponding bending point on the second defogging sheet is smaller than the thickness of the transition portion inlet and larger than the thickness of the transition portion outlet.

13. The mist elimination device according to claim 12, characterized in that: The bending point on the transition portion divides the continuous portion into at least two parts, and the angle α1 between the portion close to the inlet of the transition portion and the vertical plane is greater than the angle α2 between the portion close to the outlet of the transition portion and the vertical plane.

14. The mist elimination device according to claim 1, characterized in that: The demisting device has a flow guiding structure for guiding a first airflow flowing in from one side of the demisting device to the entire width of the demisting device.

15. The mist elimination device according to claim 14, characterized in that: The flow guiding structure includes a plurality of first flow guiding ridges formed in the first flow path. The plurality of first flow guiding ridges are intermittently arranged and extend from the first inlet to a lower region of the first flow path.

16. The mist elimination device according to claim 14, characterized in that: The flow guiding structure includes a plurality of second flow guiding ridges formed in the first flow path, and the second flow guiding ridges divide the upper portion of the mist eliminating device into a plurality of independent flow guiding chambers.

17. The mist elimination device according to claim 16, characterized in that: The cross-section of the second flow-guiding ridge portion in a direction parallel to the plane where the demisting device is located is formed into a V-shape, and the opening of the V-shape faces away from the first inlet.

18. The mist elimination device according to claim 17, characterized in that: The inner angle β of the V-shape gradually increases from one side close to the first inlet to the other side.

19. The mist elimination device according to claim 16, characterized in that: A guide groove for the first airflow to pass through is formed at the top of the guide cavity, and the rib spacing of the plurality of guide grooves gradually increases from one side close to the first inlet to the other side.

20. The mist elimination device according to claim 16, characterized in that: The flow guiding structure includes a third flow guiding ridge portion formed in the first flow path, and a flow passage for airflow is formed between the third flow guiding ridge portion and a second flow guiding ridge portion close to the first inlet.

21. The mist elimination device according to claim 20, characterized in that: A plurality of flow-dividing ridges are arranged in the first flow path and above the third flow-guiding ridge.

22. The mist elimination device according to claim 14, characterized in that: The flow guiding structure includes a fourth flow guiding ridge portion formed in the first flow path, and the fourth flow guiding ridge portion is located on a side of the first flow path away from the first inlet.

23. A cooling tower, characterized in that: A mist elimination device comprising the mist elimination device described in any one of claims 1-22.

24. A cooling tower, characterized in that: include: a body including an air inlet formed at a lower portion thereof and allowing external air to flow in, and an exhaust portion formed at an upper portion thereof and exhausting air flow; a heat exchange portion, located between the air inlet and the exhaust portion; A spraying part, located above the heat exchange part, for spraying a medium onto the heat exchange part; The demisting part is located above the spray part; the demisting part includes a demisting device; the demisting device includes: a stacked first flow path and a second flow path, which performs heat exchange between the first airflow and the second airflow; Introducing a first airflow flowing in from one side in the width direction of the mist dispelling device into a first inlet of the first flow path; Introducing a second airflow flowing in from the bottom of the mist dispelling device into a second inlet of the second flow path; discharging the first airflow flowing out of the first flow path to a first flow outlet above the mist elimination device; discharging the second airflow flowing out of the second flow path to a second flow outlet above the mist dispelling device; The first outflow outlet and the second outflow outlet are alternately stacked, and the first outflow outlet and the second outflow outlet are both located above the mist elimination device and are arranged in parallel; The width of the first outflow port is the same as the width of the demisting device, and the width of the second outflow port is the same as the width of the demisting device; The defogging device comprises a first defogging sheet and a second defogging sheet which limit and form the first and second flow paths, wherein the first defogging sheet and the second defogging sheet extend longitudinally and are alternately stacked; as well as A cold air inlet is formed on the side of the defogger; the cold air inlet is connected to the first flow path in the defogger; the cold air inlet extends in the horizontal direction and penetrates at least one side wall of the cooling tower air chamber to be connected to the outside air; Wherein, the first airflow flows into the first flow path from the cold air inlet portion; the second airflow flows from the air inlet through the heat exchange portion and the spray portion in sequence, and then flows into the second flow path.

25. The cooling tower according to claim 24, characterized in that The cold air introduction part includes a first valve, and the cold air introduction part is connected to the external air through the first valve.

26. The cooling tower according to claim 24, characterized in that The demisting device comprises two groups, and the two groups of demisting devices are arranged in a horizontal direction to form the demisting part of the cooling tower; a second valve is arranged between the two groups of demisting devices, and the air mixing part is connected with the tower space below the second valve through the second valve.

27. The cooling tower according to claim 24, characterized in that The cold air introduction part includes a third valve, and the cold air introduction part is connected with the external air through the third valve; the air mixing part is connected with the inner space of the tower below the third valve through the third valve.

28. The cooling tower according to claim 27, characterized in that The third valve comprises a first valve plate and a second valve plate, wherein the first valve plate and the second valve plate are pivotally connected to the cold air introduction portion; Wherein, the width of the first and second valve plates is the same as or different from the height of the cold air inlet portion.

29. The cooling tower according to claim 28, characterized in that When the widths of the first and second valve plates are the same as the height of the cold air introduction portion, the first and second valve plates are flipped in the same direction to open or close the third valve.

30. The cooling tower of claim 28, wherein: When the widths of the first and second valve plates are different from the height of the cold air inlet portion, the widths of the first and second valve plates each occupy half of the height of the cold air inlet portion; the first and second valve plates are flipped away from each other or towards each other to open or close the third valve.

31. The cooling tower of claim 24, wherein: An extension portion is provided at the cold air inlet portion, a module moving space is formed inside the extension portion, and at least a part of the demisting device can slide into the module moving space.

32. The cooling tower according to claim 31, characterized in that A fourth valve is arranged on a side of the extension portion facing away from the cooling tower, and the cold air inlet portion is connected to the external air through the fourth valve.

33. A cooling tower as claimed in any one of claims 27 to 30, characterized in that An extension portion is provided at the cold air inlet portion, a module moving space is formed inside the extension portion, and at least a part of the demisting device can slide into the module moving space.

34. The cooling tower according to claim 33, characterized in that A fourth valve is arranged on a side of the extension portion facing away from the cooling tower, and the cold air inlet portion is connected to the external air through the fourth valve.

35. A cooling tower as claimed in any one of claims 27 to 30, characterized in that The demisting device comprises two groups, and the two groups of demisting devices are arranged in a horizontal direction to form the demisting part of the cooling tower; a second valve is arranged between the two groups of demisting devices, and the air mixing part is connected with the tower space below the second valve through the second valve.

36. The cooling tower according to claim 31 or 32, characterized in that The demisting device comprises two groups, and the two groups of demisting devices are arranged in a horizontal direction to form the demisting part of the cooling tower; a second valve is arranged between the two groups of demisting devices, and the air mixing part is connected with the tower space below the second valve through the second valve.

37. The cooling tower of claim 35, wherein: An extension portion is provided at the cold air inlet portion, a module moving space is formed inside the extension portion, and at least a part of the demisting device can slide into the module moving space.

38. The cooling tower of claim 36, wherein: A fourth valve is arranged on a side of the extension portion facing away from the cooling tower, and the cold air inlet portion is connected to the external air through the fourth valve.

Images