Mechanical ventilation type cooling tower

Abstract

The utility model discloses a mechanical ventilation type cooling tower, which comprises a cooling tower body, three packing layers are arranged in the cooling tower body, the three packing layers are respectively an upper packing layer, a middle packing layer and a lower packing layer, the upper packing layer is made of 30 mm small-sheet-pitch simple waveform packing, the middle packing layer is made of 30 mm small-sheet-pitch simple waveform packing, and the lower packing layer is made of 30 mm small-sheet-pitch simple waveform packing. The middle filler layer and the lower filler layer are both three-dimensional wave efficient filler, the three filler layers are arranged, the upper filler layer is 30 mm small-pitch simple-waveform filler, and the middle filler layer and the lower filler layer are both three-dimensional wave efficient filler, so that the film forming effect of the whole liquid in the whole filler layers is good; and the wind resistance in the packing layers and between the packing layers is small, so that the cooling effect is good, and the cooling flow is large.

Description

Technical Field

[0001] The utility model belongs to the field of cooling towers, in particular to a mechanical ventilation cooling tower. Background Art

[0002] At present, the packing layer 2 in the existing mechanical ventilation cooling tower is mostly a double-layer structure or a three-layer structure, and the cooling tower body also has a water spray nozzle and a water collector (such as Figure 1 As shown), and the total thickness of its packing layer is 1500mm, there is a disadvantage of large wind resistance between the packing layers, and the existing packing layer has poor durability and short service life, and after aging, it will produce debris or debris to block the packing gap, and even settle at the bottom of the cooling tower to affect the water quality. Although the document number CN201514152U "Cooling Tower PVC Water Sprinkling Filler" discloses a PVC water sprinkling filler with a height of 750mm, although it has better cooling effect than the 500mm high packing layer, its performance improvement is still limited. Of course, the packing layers in the existing cooling towers are mostly two-layer structures (upper packing layer and lower packing layer), the upper packing layer is a 34.5mm large-pitch trapezoidal wave packing (height 750mm), and the lower packing layer is a 34.5mm large-pitch trapezoidal wave packing (height 500mm). The packing layer of this structure has poor durability and poor cooling efficiency. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a mechanical ventilation cooling tower with simple structure, good cooling effect and good durability.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is as follows: a mechanical ventilation cooling tower, comprising a cooling tower body, in which a packing layer is arranged, the packing layer is provided with three layers, and the three packing layers are respectively an upper packing layer, a middle packing layer and a lower packing layer, the upper packing layer is a 30mm small-pitch simple corrugated packing, and the middle packing layer and the lower packing layer are both three-dimensional wave high-efficiency packing.

[0005] The beneficial effect of the above technical solution is that by setting three layers of packing, and the upper packing layer is a simple corrugated packing with a small sheet spacing of 30mm, and the middle packing layer and the lower packing layer are both three-dimensional wave high-efficiency packing, so that the entire liquid has a good film-forming effect in the entire packing layer, and the wind resistance within and between the packing layers is small, so the cooling effect is good and the cooling flow is large.

[0006] The sum of the heights of the three packing layers in the above technical solution is not less than 1500 mm.

[0007] The beneficial effect of the above technical solution is that the height inside the cooling tower meets the requirements.

[0008] In the above technical solution, the heights of the three packing layers are consistent.

[0009] The beneficial effect of the above technical solution is that the height of the three-dimensional wave high-efficiency packing is twice the height of the 30mm small-piece simple corrugated packing, so that the liquid travels a longer distance in the three-dimensional wave high-efficiency packing.

[0010] The packing layer in the above technical solution is formed by stacking and bonding multiple layers of packing sheets, and the thickness of the packing sheets is not less than 0.4 mm.

[0011] The beneficial effects of the above technical solution are: its structure is simple, and the packing sheet has good durability and long service life.

[0012] The material of the packing sheets described in the above technical solutions is PVC.

[0013] The beneficial effect of the above technical solution is that it is light in weight and can reduce the bearing pressure of the lower packing layer.

[0014] The material of the filler sheet in the above technical solution is a modified PVC material with hydrophilic and oleophobic properties.

[0015] The beneficial effect of the above technical solution is that: the filler sheet has better hydrophilicity, and oil film is not easily accumulated on its surface, and the water flow has better film-forming property on the surface of the filler sheet.

[0016] The cooling tower body in the above technical solution also has a water collector, the sheet material of the water collector is PVC, and the thickness of the sheet material is not less than 0.8 mm.

[0017] The beneficial effect of the above technical solution is that the water collector has high strength, is not easy to deform, and has a long service life.

[0018] In the above technical solution, the maximum distance between the periphery of the three-layer packing layer and the inner wall of the cooling tower body is less than 20 mm.

[0019] The beneficial effect of the above technical solution is that it can prevent water from flowing directly down through the inner wall of the cooling tower body and affecting its cooling effect.

[0020] The cooling tower body in the above technical solution also has a plurality of water spray nozzles, and the water spray nozzles are low-pressure water distribution nozzles made of ABS material.

[0021] The beneficial effects of the above technical solution are: good water distribution effect and low cost.

[0022] The water spray nozzle described in the above technical solution is a three-splash water distribution nozzle made of ABS material.

[0023] The beneficial effect of the above technical solution is that it makes the water distribution effect better. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a simplified structural diagram of an existing mechanical ventilation cooling tower;

[0025] Figure 2 This is a simplified structural diagram of the mechanical ventilation cooling tower described in the embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the distribution of multiple water spray nozzles in the cooling tower body in an embodiment of the utility model.

[0027] In the figure: 1 cooling tower body, 2 packing layer, 2a upper packing layer, 2b middle packing layer, 2c lower packing layer, 21 packing sheet, 3 water spray nozzle, 4 water collector. DETAILED DESCRIPTION

[0028] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0029] like Figure 2 As shown, this embodiment provides a mechanical ventilation cooling tower, including a cooling tower body 1, in which a packing layer 2 is arranged, and the packing layer 2 is provided with three layers, and the three packing layers 2 are respectively an upper packing layer 2a, a middle packing layer 2b and a lower packing layer 2c, and the upper packing layer 2a is a 30mm small-piece-pitch simple corrugated packing, and the middle packing layer 2b and the lower packing layer 2c are both three-dimensional wave high-efficiency packing. By setting three packing layers, and the upper packing layer 2a is a 30mm small-piece-pitch simple corrugated packing (which belongs to the existing packing product and is not described here), the middle packing layer 2b and the lower packing layer 2 c are all three-dimensional wave high-efficiency fillers (which belong to existing filler products and are not described here in detail), so that the entire liquid has a good film-forming effect in the entire filler layer, and the wind resistance in and between the filler layers is small, so its cooling effect is good and the cooling flow rate is large; the sum of the heights of the three layers of filler layers 2 is not less than 1500mm, so that its height in the cooling tower meets the requirements. Preferably, the heights of the three layers of filler layers 2 are consistent, so that the height of the three-dimensional wave high-efficiency filler is twice the height of the 30mm small-piece simple corrugated filler, so that the liquid has a larger travel distance in the three-dimensional wave high-efficiency filler. Specifically, the sum of the heights of the three layers of filler layers 2, and the height of each layer of the filler layer is 500mm.

[0030] Specifically, the packing layer 2 is formed by stacking and bonding multiple layers of packing sheets 21, the thickness of the packing sheets 21 is not less than 0.4 mm, the structure is simple, and the packing sheets have good durability and long service life. The material of the packing sheets 21 is PVC material, which is light and can reduce the bearing pressure of the lower packing layer. The material of the packing sheets 21 is modified PVC material with hydrophilic and oleophobic properties (which belongs to the existing modified PVC materials on the market), so that the packing sheets have better hydrophilic properties, and at the same time, it is not easy for oil film to accumulate on its surface, and at the same time, the water flow has better film-forming properties on the surface of the packing sheets.

[0031] In the above technical solution, the maximum distance between the periphery of the three-layer packing layer 2 and the inner wall of the cooling tower body 1 is less than 20 mm, which can prevent water from flowing directly down through the inner wall of the cooling tower body and affecting its cooling effect.

[0032] The cooling tower body 1 in the above technical solution also has a plurality of water spray nozzles 3, and the water spray nozzles 3 are low-pressure water distribution nozzles made of ABS material, which have good water distribution effect and low cost. Preferably, the water spray nozzles 3 are three-splash water distribution nozzles made of ABS material, so that the water distribution effect is better (it has a locking mechanism to prevent loosening to ensure the safety of the connection and has greater adaptability to hydraulic loads. It belongs to an existing product and will not be described in detail here), wherein, Figure 3 As shown, the plurality of water spray nozzles are evenly distributed in the cooling tower body, thereby achieving a good water distribution effect in the entire cooling tower body.

[0033] In this embodiment, the water collector 4 should have the characteristics of high water collection efficiency, small air flow resistance, high strength, no deformation, long service life, good flame retardant performance, and easy installation and maintenance; the sheet material of the water collector is made of modified PVC material (with good temperature difference resistance: no softening and deformation at 65°C, no brittle cracking at -40°C), and is formed by extrusion; the flame retardant oxygen index is not less than 40, and the edges of the sheet material of the water collector should be strengthened and thickened, the thickness of the sheet material should be not less than 0.8mm, and the sheet shape should be regular.

[0034] In this embodiment, the packing layer adopts a three-layer packing layer structure, and the upper packing layer 2a adopts 30mm small-pitch simple corrugated packing, and the middle packing layer 2b and the lower packing layer 2c both adopt three-dimensional wave high-efficiency packing, which can effectively increase the volume specific surface area of ​​the heat dissipation material and reduce the probability of clogging in the bottom packing area.

[0035] The physical and chemical performance indicators of the filler sheet (PVC material) in the three-layer filler should comply with the relevant provisions of DL / T742-2019 "Technical Conditions for Plastic Parts". The density of the filler sheet shall not exceed 1.55g / cm, the tensile strength of the filler sheet shall not be less than 40MPa, and the flame retardant oxygen index shall be ≥30. The filler sheet shall have good hydrophilic and oleophobic properties, and its resistance to temperature difference changes and moisture and heat aging is excellent. It shall not undergo geometric deformation at 65°C and shall not break or crack at -30°C. The filler sheet can be bonded with a special adhesive (existing product) with a bonding rate of not less than 95%. The flat compressive strength of the filler layer shall be ≥300kg / m 2 , the shear strength after 24 hours of bonding must be greater than 3.3Mpa.

[0036] After the improvement of this embodiment, the thermal performance of the mechanical ventilation cooling tower is improved by about 12% based on the existing working conditions. Under the same processing conditions, compared with the original working conditions, the outlet water temperature can be reduced by about 0.8°C.

[0037] Among them, the position distribution relationship of the packing layer, the water collector, the multiple water spray nozzles in the cooling tower body and the structure of the cooling tower body itself in this embodiment belong to the existing technology in this field, so they are not described here in detail.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical ventilation cooling tower, comprising a cooling tower body (1) in which a packing layer (2) is arranged, characterized in that: The packing layer (2) is provided with three layers, and the three packing layers (2) are respectively an upper packing layer (2a), a middle packing layer (2b) and a lower packing layer (2c); the upper packing layer (2a) is a simple corrugated packing with a small sheet spacing of 30 mm, and the middle packing layer (2b) and the lower packing layer (2c) are both three-dimensional wave high-efficiency packing.

2. The mechanical ventilation cooling tower according to claim 1, characterized in that: The sum of the heights of the three packing layers (2) is not less than 1500 mm.

3. The mechanical ventilation cooling tower according to claim 2, characterized in that: The heights of the three packing layers (2) are consistent.

4. The mechanical ventilation cooling tower according to claim 1, characterized in that: The packing layer (2) is formed by stacking and bonding multiple layers of packing sheets (21), and the thickness of the packing sheets (21) is not less than 0.4 mm.

5. The mechanical ventilation cooling tower according to claim 4, characterized in that: The material of the filler sheets (21) is PVC.

6. The mechanical ventilation cooling tower according to claim 5, characterized in that: The material of the filler sheet (21) is a modified PVC material with hydrophilic and oleophobic properties.

7. The mechanical ventilation cooling tower according to claim 6, characterized in that: The cooling tower body (1) also has a water collector (4), the sheet material of the water collector (4) is PVC, and the thickness of the sheet material is not less than 0.8 mm.

8. The mechanical ventilation cooling tower according to any one of claims 1 to 7, characterized in that: The maximum distance between the periphery of the three packing layers (2) and the inner wall of the cooling tower body (1) is less than 20 mm.

9. The mechanical ventilation cooling tower according to claim 1, characterized in that: The cooling tower body (1) is also provided with a plurality of water spray nozzles (3), and the water spray nozzles (3) are low-pressure water distribution nozzles made of ABS material.

10. The mechanical ventilation cooling tower according to claim 9, characterized in that: The water spray nozzle (3) is a three-splash water distribution nozzle made of ABS material.

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