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State Environmental Protection Administration recently announced the 2005 annual national comprehensive urban environmental improvement examination results, Lanzhou out in the urban air quality worse than Grade III cities in the list. Air pollution in Lanzhou City has been very serious, through the implementation of clean energy transformation to improve urban air quality, is a realistic and urgent choice. However, Lanzhou rehabilitation programs because of the energy shortage facing the stranded natural gas. The hope of gas, “past his home without”, from which you can see the decision-making and the huge gap between the reality.

In recent years, in order to improve air quality, many cities have been actively implementing clean energy plan to promote coal to gas, of which natural gas is the main alternative sources of energy. However, the natural gas production and supply can not keep up prevention and control of atmospheric pollution due to the emergence of strong demand, not only affect the daily lives of our customers, but also jeopardize the results of air quality improvement and clean energy sources had to slow down the pace of transformation. Last winter, Beijing has undergone a “gas shortage”, using natural gas-powered buses smaller, part of the fields to limit gas; Zhengzhou started a huge gap because of natural gas emergency plan natural gas supply and limit the excessive growth of natural gas users. This year, tensions have not eased, such as Shanghai, the city’s demand for 2.9 billion cubic meters of natural gas, while the contract for gas is only 2.2 billion cubic meters; Xi’an gap to reach 50 million cubic meters of natural gas. According to analysts, by 2010, China’s natural gas shortage will reach 40 billion cubic meters. Therefore, the gas shortages would be a long-term problem in the short term is difficult to solve fundamental. Continued tight supply of natural gas, while affecting many cities, clean energy to the current implementation of the plan, showing the search for more clean energy, the urgency; the other hand, prompted the Government and the relevant departments of the decision-makers reflect on the current implementation of such a large-scale to replace coal with natural gas to improve the air quality of the environment can continue to go on the road, whether you want long-term perspective, a more comprehensive, more detailed, the better to adjust the energy supply structure. China’s urban

use of natural gas due to seasonal differences in a huge gap between, for example, Beijing Gas Consumption in winter is at least 6 times in summer, this city of the need for heating exists in varying degrees. Winter is the peak gas, while air pollution is the worst season, most in need of the use of clean energy to improve air quality. To resolve this conflict, can build gas storage to not take the summer to winter, natural gas can save up re-use, in part, to solve the problem of inadequate supply. But more importantly, the city governments in the formulation of energy planning and clean energy projects, it should fully take into account the natural gas supply assurances, once the natural gas supply is not on, it is necessary to take effective countermeasures. Because China’s natural gas production is set for, and sometimes even signed a supply contract included in the gas supply plan, may also be due to some special reasons, can not be honored. Therefore, it is reasonably necessary to deploy the use of various energy sources, to ensure the safe use and environmental quality. In particular, to develop a variety of clean energy and reduce dependence on natural gas to ensure that urban air quality due to the abundance of natural gas shortage and the ups and downs.

natural gas to replace coal, to improve the urban atmospheric environment, whether a large-scale promotion of this model, can continue, is worthy of study. First of all, China’s natural gas resources are abundant, while the demand is very large; Second, the gas prices rising, which means the cost of improving air quality will also be followed up; third, heating boilers from coal to gas, direct combustion of natural gas , which is equivalent to high-grade energy into low-grade heat, resulting in inefficient utilization of energy. Experts believe that natural gas is a high-quality energy, it should be economical and reasonable use, such as in areas where conditions permit the development of natural gas as fuel for combined heat and power mode. The hidden dangers of natural gas is being exposed, all aspects should actively look for a solution for the city to build a sound system of clean energy supply and use.

要建设一个强大的清洁能源供应系统

国家环境保护总局最近公布的2005年度全国城市环境综合整治定量考核结果，兰州市区空气质量超过三级的城市名单中的糟糕了。兰州市的空气污染程度十分严重，通过实施清洁能源改造，以改善城市空气质量，是一个现实和紧迫的选择。但是，由于能源面临天然气短缺滞留兰州康复计划。气体的希望“，而过去他的家”，从中可以看到决策和现实之间的巨大差距。

近年来，为了改善空气质素，许多城市都在积极实施清洁能源计划，以促进煤改气，其中天然气为主要能源的替代来源。但是，天然气生产和供应无法跟上防治大气污染的原因是强劲的需求的出现，控制，不仅影响我们客户的日常生活，而且还危害空气质量的提高，清洁能源的结果已减缓了转型的步伐。去年冬天，北京发生了“气荒”，使用天然气为动力的公共汽车较小，部分领域的限制气体;郑州开始了，因为天然气应急预案的巨大差距天然气的供应，限制天然气过快增长用户。今年，紧张局势并未缓和，如上海，全市的2.9亿立方米天然气的需求，而天然气的合同只有2.2亿立方米;西安的差距将达到5000万立方米天然气。据分析，到2010年，中国的天然气短缺将达到40亿立方米。因此，天然气短缺将是在短期内长期存在的问题是难以解决的根本。持续紧张的天然气供应，而影响到许多城市，清洁能源的计划，目前的，显示了更多的清洁能源搜索，紧迫性，另一方面，促使政府和有关部门决策的决策者反映在这样一个大规模的以天然气取代煤，以改善环境空气质量目前的执行能继续走在路上，不管你要的是长远的角度来看，更全面，更详细，更好地调整能源供应结构。中国城市

天然气由于在一个巨大的季节性差异悬殊使用，例如，北京燃气消费在冬天是在夏天至少6次，这是城市供热的需要在不同程度上存在。冬季是煤气高峰期，而空气污染是最糟糕的赛季，大部分在使用清洁能源的需要，改善空气质素。要解决这个矛盾，可以建立天然气储存，不采取夏季冬季，天然气可以节省重复使用，部分解决供应不足的问题。但更重要的是，在能源规划和清洁能源项目制订城市政府，应该充分考虑到天然气供应保证，一旦天然气供应不上，有必要采取有效的对策。由于中国的天然气产量为，有时甚至签订供应合同包括在天然气供应计划，也可能是由于一些特殊原因，不能兑现。因此，有必要合理部署各种能源的使用，以确保安全使用和环境质量。特别是，开发出多种清洁能源和减少对天然气的依赖，以确保城市空气质量由于天然气短缺，起伏丰富。

天然气代替煤，以改善城市大气环境，无论是大型的这一模式的推广，可以继续，是值得研究。首先，中国的天然气资源丰富，而需求非常大，二是天然气价格的上涨，这意味着改善空气质量成本也将跟进;第三，从燃煤供热锅炉，燃气，直接燃烧天然气，相当于高档的能量转化为低级热量，在能源利用效率低下造成的。专家认为，天然气是一种优质能源，应当节约和合理使用，如在有条件的地方使用天然气作为热电联产燃料的发展模式。天然气的隐患正在暴露出来，各方面应积极寻找解决方案，为城市建设的清洁能源供应和使用的音响系统。06.9.6