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冷却塔改造水轮机

冷却塔改造水轮机

冷却塔填料

填料是冷却塔最重要的部分,它的效率高低,取决于冷却水与空气在填料中充分接触的程度。本厂家的填料耐温50℃~68℃,耐老化,性能优良、抗紫外线,寿命长。其优点如下:1、性能好,冷却效率高填料为薄膜式,突起的细波纹使水接触面更大。填料分3~4层放置,层与层之间均有一次热水的再分布过程。2、亲水性好、通风阻力小表面呈现粗糙、较光滑平面的填料亲水性好,吸水率小于0、015%,使更多的水流形成薄膜,而不溅落,使水和空气更充分地接触同时使水与空气在流动时表面扰动大。填料组装后入风面是呈蜂窝状的导流器,有良好的均布风效果,提高并稳定了水气的热交换强度。入风端倾斜30°角,有效地降低了漂水损失。在填料末端设置有按撞击分离法设计的收水器,使漂水损失有效控制在十万分之一以内。3、HMK~LAV系列冷却塔塔芯材料由优质PVC聚乙烯片吸塑而成,由于采用了梯形波填料,散热面积增长系数大,水流在板面上分布性能好,水和空气流经板面时扰动大等优点。填料不易变形,耐高温,抗老化,且阻燃性能好,风阻系数小。安装方便,易清洗,运输方便该散热填料采用不粘接悬挂式,安装简便,便于清洗,且成功解决了粘接填料因吸积垢、自重而产生变形,且变形后积垢更加严重、难于清洗的问题。填料阻燃性能好,阻燃氧指数指标为44、7。4、填料的散热在横流塔中占整个温降的85%以上。冷却塔的散热过程主要在散热填料板面上进行,填料表面上的水膜缓慢流下,最里层水膜为湿度100%的高焓值湿空气,水分子从高焓值区域跑向低焓值的进塔新风中,使出塔空气焓值增大。而随着水分子浓度降低,循环热水中的水分子不断蒸发从液态变为气态,从而带走蒸气潜热。依上述原理,填料的优劣是制冷效果的关健。康明牌冷却塔填料满足国际上属于第四代填料要求:扰度大立体三维变形定位准确;
静压损失小,气流阴力小;
水流时间长高3000㎜;
接触面积大,面积增长系数大;
水、气分布均匀进气口有蜂窝状的风分布装置,使塔不会因片距不均匀而产生风分布不均匀现象,均布的风负荷使塔的散热填料面积得到有效使用;
不变形;
不破碎;
系水性好;
强度高;
低噪声低漂水;
长寿命;
不滋生青苔,因蜂窝状进风口的三维特性,使阳光大部分不能射入塔体填料表面,因此填料表面难以长青苔;
5、方形冷却塔填料采用国内独创国外普通使用的悬挂式填料,无需粘接,众所周知,填料表面因循环水中水份蒸发,无机物浓度增大而结晶沉淀,结垢在填料表面和塔内,管道内壁;
旧式大陆填料是靠粘接并用支架托住的,在使用中陷入恶性循环即积垢以后自重变重,填料在超负情况下,加上水流冲击,发生弯腰变形,而变形以后的填料正面受水流冲击力,冲击力反过来使变形更加严重,这是一种不可逆的恶性循环,开始这种循环,填料很快就因拉力使粘接点断裂,倒塌;
而悬挂式填料是形成动态平衡的良性循环,当表面积垢后,填料因自重更保持原有的垂直形态,随着水流冲刷,表面过厚度的积垢脱落,形成动态平衡,不会因积垢而损伤,提高填料使用寿命,方形横流式冷却塔填料保用寿十五年。

冷却塔组运行过程中存在异味处理

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