超大型高位收水塔和常规塔热力性能研究与优化分析

摘要

Due to the flow path guiding role of the high-level tower between the collection board , the high-level tower to close the upper device mainly heat and mass transfer area, especially over the filling, air flow rate substantially at the heart of the highest tow-er, and the tower wall area near the air flow rate is relatively small , whereas the conventional column appears in about two-thirds of the maximum speed of the radius;Combined with conventional tower and high-level tower’s characteristics of each tower, by optimi-zing the geometry size, by optimizing the wind and the water, by optimizing the filling the uneven arrangement, additional measures such as deflector reduce the tower water temperature , thereby further reducing heat consumption. To prevent the high ambient wind speed under the high-level tower thermal performance deteriorated sharply, it requires a combination of meteorological conditions on the site rectifying tower to optimize the flow field, in the tower inlet adding deflector measures may be the focus of future research.%由于高位塔收水板间流道的导向作用，高位塔收水装置上部主要传热传质区，特别是填料上方，空气流速基本以塔心最高，而塔壁附近区域空气流速则相对较小，而常规塔最高速度出现在半径的三分之二左右；结合常规塔和高位收水塔各自特点，可通过优化塔型几何尺寸、配风配水、填料不均与布置、增设导流装置等措施降低出塔水温，从而进一步降低机组热耗。为防止高速环境风下高位塔热力性能急剧恶化，需结合厂址气象条件对塔内流场进行整流优化，在塔外进风口增设导流装置等措施可能是今后研究重点。