论文部分内容阅读
利用自制的“高压静电水处理器”对电厂循环冷却水进行了动态模拟阻垢研究,从理论与实验的角度,分析了高压静电水处理器腔内电场分布。研究表明,离子棒高压静电场为双介质非均匀径向稳恒高压静电场,静电场中PTFE介质层构成离子棒绝缘层,水介质层构成循环冷却水与电场进行能量交换的空间;应用拉普拉斯方程对水介质空间电场分布分析表明,循环水空间的电场能量密度在10-32~10-30J/mol数量级,远未达到水分子团簇氢键破裂的能量级别,因此离子棒提供的电场能量只起到促使水分子团簇向氢键断开的方向变化,而未提供水分子团簇氢键断开的全部能量;高压静电场的阻垢作用关键是使水中成垢离子的结晶形态发生变化,电场能量使热平衡体系中的自由能△G增加,导致文石晶核形成的几率增大,文石晶体呈粉末状,易随水流冲走而减少了在换热表面的沉积,从而抑制方解石型水垢生长。
The self-made “high pressure electrostatic water processor” was used to simulate and study the circulating cooling water in the power plant dynamically. From the theoretical and experimental standpoints, the electric field distribution in the high pressure electrostatic water processor was analyzed. The results show that the high voltage electrostatic field of the ion bar is a two-medium non-uniform radial steady high-voltage electrostatic field, the PTFE dielectric layer in the electrostatic field forms the ion-insulating layer, and the water medium layer forms the space for energy exchange between the circulating cooling water and the electric field. The analysis of the electric field distribution of Plass equation in aqueous media shows that the energy density of the electric field in the circulating water space is in the order of 10-32-10-30 J / mol, which is far from the energy level of water molecule cluster hydrogen bond rupture. Therefore, Of the electric field energy only to promote the water molecules to the hydrogen bond to disconnect the direction of change, but did not provide the full energy of the hydrogen bonds of water molecules disconnected; the role of high-voltage electrostatic field scale inhibitor is to scale water ions The crystal morphology changes. The electric field energy increases the free energy △ G in the heat balance system, which leads to the increased probability of aragonite nucleus formation. The aragonite crystals are powdery and easily reduce the deposition on the heat exchange surface , Thereby inhibiting calcite type scale growth.