资源科学 ›› 2016, Vol. 38 ›› Issue (9): 1791-1800.doi: 10.18402/resci.2016.09.16

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中国水泥生产碳排放系数省区空间差异性及成因分析

赵建安1,2(), 郑宗强1,2(), 曹植1,2, 姚建华1   

  1. 1. 中国科学院地理科学与资源研究所,北京 100101
    2. 中国科学院大学,北京 100049
  • 收稿日期:2016-01-10 修回日期:2016-08-10 出版日期:2016-09-25 发布日期:2016-09-22
  • 作者简介:

    作者简介:赵建安,男,山西洪洞人,研究员,主要从事资源开发利用与区域经济发展研究。E-mail:zhaoja@igsnrr.ac.cn

  • 基金资助:
    中国科学院先导项目(XDA05010400);中国建筑材料科学研究总院委托项目(中国水泥CO2排放地理图)

Spatial and causal analysis of discrepancies in CO2 emission factors for cement production among provinces in China

ZHAO Jianan1(), ZHENG Zongqiang1,2(), CAO Zhi1,2, YAO Jianhua1   

  1. 1. Institute of Geographic Science and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101,China
    2. University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2016-01-10 Revised:2016-08-10 Online:2016-09-25 Published:2016-09-22

摘要:

中国作为全球最大水泥生产国,水泥生产碳排放量大。除因产能、产量规模差异形成省区间排放总量差异外,碳排放系数区域差异也影响着总排放量不同。本文以省区为单元,基于全国20个主要水泥生产省区的碳排放系数抽样调查基础数据,分析和比较了省区间水泥熟料工艺碳排放系数、熟料燃料碳排放系数、水泥工艺碳排放系数、水泥燃料碳排放系数及间接碳排放系数的空间差异,结合ArcGIS对各类碳排放系数的空间差异分布进行直观体现;并以生产线为对象分析省区间水泥生产碳排放系数存在空间差异的原因。相关分析结果表明:水泥熟料工艺碳排放系数在总体上呈现由西部、中部省区向东部省区递减的态势,差异性产生的原因主要是省区间水泥用石灰石品质的不同,即生料中石灰石的CaO含量起到基本决定作用,替代材料用量及CaO比例也会产生一定影响;熟料燃料碳排放系数总体分布格局是东部沿海省区相对较低,中西部省区较高,差异原因主要是各省区水泥生产线所用煤炭种类及低位发热值的差异。煤炭低位发热值较高的省区,燃料碳排放系数就越小;水泥工艺碳排放系数及燃料碳排放系数的总体格局是多数东部沿海省区相对较低,中西部多数省区相对较高。差异主要与水泥熟料比直接相关,熟料比越低则水泥碳排放系数亦越小;间接碳排放系数主要由大区电力生产碳排放系数所决定,但水泥生产线余热发电对间接碳排放系数亦有影响。

关键词: 熟料与水泥, 碳排放系数, 区域差异, 成因分析

Abstract:

As the largest producer of cement worldwide,China is also the biggest emitter of CO2 emissions. It has been widely recognized that CO2 emission factors affect and define regional CO2 emissions,capacity and scale. We therefore discuss regional spatial differences in CO2 emission factors in terms of the CO2 emission factor of the clinker process,CO2 emission factor of clinker fuel,CO2 emission factor of cement processes,CO2 emission factor of cement fuel and indirect CO2 emission factor in provinces based on sampling survey data. To identify differences,we produced five corresponding thematic maps to view the spatial distribution. Our results indicate that the spatial distribution characteristics of four preceding items are almost the same:the eastern coastal provinces are relatively low and central and west regions are higher. As for the indirect CO2 emission factor,it is mainly decided by the CO2 emission factor of the Chinese regional power grid;its distribution feature is ambiguous. We further explored sources of differences in CO2 emission factors among provinces. We argue differences in the CaO content of limestone and raw material additives affect the results. However,differences in the CaO content of limestone are critical. Differences in the CO2 emission factor of clinker fuel are because of the coal low calorific value. The lower average low calorific value,the less the CO2 emission factor of clinker fuel. In the cement grinding process,power consumption produces CO2 emissions. So the spatial variances of the CO2 emission factor of the cement process and fuel are highly related to the clinker-cement ratio. The spatial differences in indirect CO2 emission factor between the twenty provinces is small,and mainly decided by CO2 emission factor of Chinese regional power grids. Whether cement production lines own the waste heat power generation also reduces the indirect CO2 emission factor.

Key words: clinker and cement, CO2 emission factor, regional differences, causal analysis