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在我国如何推广蒸发式冷凝器的使用方法

人气:162 评论:0 日期:2018-05-28 09:28:47

蒸发式冷凝器用在电厂冷却系统中有其必要性和可行性,但在中国推广使用应注意以下几个问题:

(1)蒸发式冷凝器的发展首先应注意理论创新和完善,寻求新理论的突破。高效传热管的研制、管型的改进和管表面性质的改造是蒸发式冷凝器发展的一个重要方面。特别是当电厂凝汽器由管外冷凝改用管内冷凝后,其传热性能和结构发生了很大的变化,在这些方面更需要有理论的指导和创新。

(2)火电厂中蒸发式冷凝器要冷却的工质是水蒸气或天然气,而我国目前用在石油化工和制冷装置上的蒸发式冷凝器所冷却的工质是氨、氟里昂或碳氢化合物。要使蒸发式冷凝器在火电厂中得到应用,就必须根据水蒸气或天然气本身的性质特点,要求冷却系统在流程安排、结构设计及运行操作等方面与之相适应。 

(3)由于我国幅员辽阔,各地气候条件有很大差异,而蒸发式冷凝器的冷凝效果受气候条件影响较大,所以应结合中国当地实情来设计蒸发式冷凝器。

Evaporative condenser has its necessity and feasibility in cooling system of power plant, but the following problems should be paid attention to in China.

(1) the development of evaporative condenser should first pay attention to theoretical innovation and perfection, and seek breakthroughs in new theory. The development of highly efficient heat transfer tubes, improvement of tube shape and modification of surface properties of tubes are important aspects of the development of evaporative condensers. In particular, the heat transfer performance and structure of the condensers in the power plant are changed greatly when condensers are condensed from outside the tube to the tube, and the theoretical guidance and innovation are needed in these aspects.

(2) the refrigerant of evaporative condenser in thermal power plant is to be cooled by water vapor or natural gas, and the refrigerants of evaporative condenser used in petrochemical and refrigeration equipment are ammonia, Freon or hydrocarbons. In order to make the evaporative condenser applied in the thermal power plant, it is necessary to adapt the cooling system to the process arrangement, structure design and operation operation according to the characteristics of water vapor or natural gas itself.

(3) because of the vast territory of our country, the climate conditions are very different, and the condensing effect of the evaporative condenser is greatly influenced by the climate conditions. Therefore, the evaporative condenser should be designed in combination with the local actual situation in China.

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