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本文首先介绍了在各种工业用水预测方法中最常用的“分行业重复利用率及万元产值用水量计算法”,该法的关键问题是合理地确定预测年份的工业用水重复利用率。文章根据对北京市目前工业节水投资和经济效益的分析、目前北京市工业用水重复利用率与国内外水平的比较分析,以及对各行业提高重复利用率的措施的分析,得出了预测年份1990年和2000年北京市各行业工业用水重复利用率及其经济效益.此外,本文还对工业用水预测误差及修正问题进行了研究,得出了“分行业重复利用率及万元产值用水量计算法”的修正计算公式。
This paper first introduces the most commonly used method for calculating industrial water reuse rate and water consumption per unit output value in various industrial water prediction methods. The key issue of this method is to reasonably determine the reuse rate of industrial water in predicted years. Based on the analysis of the present industrial water-saving investment and economic benefits in Beijing, the current comparative analysis of industrial water reuse rates in Beijing and domestic and overseas levels, and the analysis of the measures to improve the reuse rate of various industries in Beijing, the paper draws the forecast year In 1990 and 2000, the recycling rate of industrial water and its economic benefits in various industries in Beijing were also studied.In addition, the paper also studied the prediction error and correction of industrial water use, and obtained “the sub-industry recycling rate and water consumption of 10,000 yuan output value Calculation method ”correction formula.