Different filler forms required for packing of different cooling towers
Human word waveCooling tower FillerThe choice
Whether the filler selection of human word wave cooling tower is appropriate is directly related to the cooling effect. According to the tower shape, thermal performance, resistance performance, ventilation conditions, materials, maintenance, filler support mode and structure, circulating water temperature and water quality and cost and other comprehensive factors, through the technical and economic comparison after the selection.
1.The filler forms required by different towers are different. such as large and medium-sized countercurrent cooling tower, the general use of plastic oblique wave, trapezoidal oblique wave, cement grid and plastic folding wave, etc.;Plastic oblique wave and cement curved strip are widely used in cross-flow cooling tower. Even for fillers that are suitable for inverse and transverse flow towers, attention should be paid to the requirements when used in different tower shapes. If the oblique wave filler is used in the Countercurrent tower60° Oblique wave, while in the cross-flow tower used30° Oblique wave.
2.It is required that the filler hydrophilicity can be good, has high heat exchange performance and allows for a large water load. The filler made of plastic sheet makes the filler of human character wave cooling tower lighter, the volume is reduced, the cooling surface area per unit volume increases, and the heat exchange performance of the large water load can be allowed to be greatly improved. It is hoped that the resistance of the airflow through the human word wave cooling tower filler will be small and the airflow distribution should be even.
3.Filler materials to be easy to get, long service life, easy installation and transportation, cheap, easy to repair.
4.When using plastic human character wave cooling tower filler, it is necessary to pay attention to:
(1)When the water quality of circulating water is poor, untreated and easy to scale on the surface of filler, it is not appropriate to use the human word wave cooling tower filler in the form of oblique wave and honeycomb with small spacing of filler slices.
(2)The material of the plastic should meet the specified performance indicators:
1)In65No geometric deformation occurs under ℃ conditions.
2)In the design of the minimum temperature conditions are not broken, not brittle cracking.
3)Under normal operation and conditions of use, its life is not less than20Years.
4)It has good flame retardant properties.
5.In the design of the support system of the human character wave cooling tower filler, the operating weight of the human word wave cooling tower filler should be counted as follows:
(1)The weight of the filler.
(2)Scaling on the surface of the filler and the weight of the sediment.
(3)The water film weight of the filler surface is thick according to the surface of each side of the filler sheet0.5~1.0mmDesign.
(4)Cold area human word wave cooling tower filler lower layer may form hanging ice load, depending on the situation can be used150~250kg/m2。
Cement grid, folding wave, oblique staggered filler, trapezoidal oblique wave filler has the advantages of good cooling effect, easy availability of materials, good durability, small ventilation resistance, good airflow distribution performance, and so on, the large cooling tower is used more, but also the use of plastic grid, honeycomb and other fillers. The small and medium-sized mechanical ventilation cooling tower mostly uses the oblique wave, trapezoidal oblique wave or other filler made of hard polyvinyl chloride.