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电力工业快速增长与淡水资源紧张已成为我国经济发展中一对无法回避的矛盾。到2005年底,全国发电装机容量已突破5亿kW,根据电力发展规划,“十一五”期间我国将新增装机容量2．45亿kW。在这种情况下,作为仅次于农业灌溉的第二用水大户,发电行业的水资源保护以及节约用水便显得极为重要和紧迫。近十多年来,火力发电节水技术有了很大发展,其中节水型火电空冷技术因其显著的节水效果受到广泛的重视。以600MW机组为例,采用湿冷技术耗水率约为0．68m3／(s·GW),而采用空冷技术耗水率约为0．13m3／(s·GW),节水效果显著。从国家大力提倡发展空冷电厂之日至今,空冷电厂已逐步形成规模,且以大容量空冷机组为主。本期“特别策划”应读者之约并与本刊技术版“空冷专题”栏目配合,主要将我国目前空冷技术、存在热点问题,以及相关设备制造情况做一简要介绍,旨在让读者对我国电厂空冷领域的发展现状以及存在的问题得以概括了解。在空冷技术的应用方面,我们选择了刚刚投运空冷系统不久的山西兆光电厂,希望从他们的运行与实践中,让读者得到一些值得借鉴和规避的东西。在设备的研发状况方面,我们选择了代表国内空冷设备研发技术与实力的制造商—哈尔滨空调股份有限公司(以下简称哈空调),也许从他们的业绩与实力的陈述中,我们可以体会到中国电厂空冷设备的发展历程以及如何走好将来的发展之路。我们还邀请了业内专家对空冷技术设计、选型、运行等的一些热点问题展开探讨.
The rapid growth of power industry and the shortage of freshwater resources have become an unavoidable contradiction in the economic development of our country. By the end of 2005, the national installed capacity of power generation has exceeded 500 million kW. According to the plan for power development, China will add 245 million kW of installed capacity during the “Eleventh Five-year Plan” period. Under such circumstances, as a second largest water user after irrigation, it is extremely important and urgent to protect the water resources in the power generation industry and to save water. In recent ten years, thermal power generation technology has made great progress, including water-cooled thermal air-cooling technology due to its significant water-saving effect by the widespread attention. Taking 600 MW unit as an example, the water consumption rate of wet cooling technology is about 0.68 m 3 / (s · GW), while that of air cooling technology is about 0.13 m 3 / (s · GW), and the water saving effect is remarkable. Since the country strongly advocated the development of air-cooled power plant so far, air-cooled power plants have been gradually formed scale, and to large-capacity air-cooled units based. This issue of “special planning” should be readers of the contract and with the technical section of “air-cooled topic” column with the main air-cooling technology in our country, there are hot issues, and related equipment manufacturing make a brief introduction, designed to allow readers of our country Power plant air cooling in the field of development and existing problems can be summarized understanding. In the application of air-cooled technology, we have just put the air-cooling system just put shortly before the Shanxi trillion light plant, hoping from their operation and practice, so that readers get something worth learning and to avoid. In terms of R & D status of equipment, we have chosen Harbin Air Conditioning Co., Ltd. (hereinafter referred to as Ha Kong Air Conditioning), a manufacturer that represents the technology and strength of research and development of domestic air-cooled equipment. Perhaps from their performance and strength statements, we can understand that China Development history of power plant air cooling equipment and how to take a good future development. We also invited industry experts to discuss the hot issues of air cooling technology design, selection, operation and so on.