CN112328854A - 基于生命周期分析的钢铁企业废气减排环境影响评价方法 - Google Patents
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Abstract
本发明属于环境影响评价与管理领域,尤其是涉及一种基于生命周期分析的钢铁企业废气减排环境影响评价方法。包括下述步骤:步骤一:确定评价对象;步骤二:抓取目标钢铁企业的生产投入数据;步骤三:抓取目标钢铁企业的产出数据和废气产排数据;步骤四:计算钢铁的能源和资源消耗;步骤五:计算钢铁的废气产生量和废气排放量;步骤六:整理得到目标钢铁企业的生命周期清单;步骤七:计算废气处理前后的中间点环境负荷和最终损害类别的影响;步骤八:计算最终损害类别的影响;本发明能够客观、定量的对钢铁企业废气减排成效导致的环境负荷变化做出计算,为促进重点行业的废气治理提供技术支持。
Description
技术领域
本发明属于环境影响评价与管理领域,尤其是涉及一种基于生命周期分析的钢铁企业废气减排环境影响评价方法。
背景技术
根据2017年第二次全国工业源大气污染普查结果,黑色金属冶炼和压延加工业(主要为钢铁工业)是最主要的大气污染排放行业之一,分别占氮氧化物排放总量的22%;挥发性有机物排放总量的7%;颗粒物排放总量的9%;二氧化硫排放总量的16%;重金属废气(含汞、铬、镉、铅、砷)排放总量的11%。所以钢铁行业的废气减排成效一直是备受环境保护部门的重视。
目前对工业企业的废气减排成效的衡量标准主要是废气的处理率或减排百分比,这类标准虽然简单易计算,却不能反应废气减排前后或者废气减排量的变化对环境的因素的影响。生命周期分析是环境影响评价的重要手段,常用于评价产品的生产、使用和报废回收等环节对环境要素的影响,在废气减排效果的评估方面少有应用。因此为了客观、定量的对钢铁企业废气减排成效带来的环境影响做出评价,提出了基于生命周期分析的钢铁企业废气减排环境影响评价方法。
发明内容
本发明提出了一种基于生命周期分析的钢铁企业废气减排环境影响评价方法,具体技术方案如下;
一种基于生命周期分析的钢铁企业废气减排环境影响评价方法,包括下述步骤:
步骤一:基于生命周期分析(LCA)的范围和定义,将钢铁企业的废气排放环节,确定评价对象,实现“大门到大门”的生命周期环境影响评估;
步骤二:通过网络爬虫技术抓取目标钢铁企业的生产投入数据;
步骤三:通过网络爬虫技术抓取目标钢铁企业的产出数据和废气产排数据;
步骤四:根据步骤二和步骤三所得数据计算目标钢铁企业每生产一吨钢铁的能源和资源消耗;所述每吨钢铁的能源和资源的消耗计算方法如下:
式中:Qi为能源或资源的年消耗量,单位t/Kwh/m3;
M为目标钢铁企业的年钢铁产量,单位t;
q为每吨钢铁的资源或能源消耗;
i为资源或能源的种类;
步骤五:根据步骤二和步骤三所得数据计算目标钢铁企业每生产一吨钢铁的废气产生量和废气排放量;所述每吨钢铁的废气产生量和废气排放量,计算方法如下:
式中:Pi为废气的年产生量,单位为t;
M为目标钢铁企业的年钢铁产量,单位为t;
a为生产每吨钢铁的废气产生量;
i为废气的种类;
式中:Di为废气的年排放生量,单位为t;
M为目标钢铁企业的年钢铁产量,单位为t;
b为生产每吨钢铁的废气产生量;
i为废气的种类;
步骤六:汇总步骤四和步骤五的计算数据,整理得到目标钢铁企业的生命周期清单;
步骤七:将步骤七的清单数据录入生命周期软件Simapro,计算废气处理前后的中间点环境负荷和最终损害类别的影响,从而评估钢铁企业的废废气减排成效和环境效益;
步骤八:计算最终损害类别的影响,从而评估钢铁企业的废废气减排成效和环境效益;所述计算最终损害类别的影响,计算方法如下:
M=I×S
F=∑M×E×W
C=F×Ci×W
M-中间点损害值,中间点影响类别的结果值;
I-物质消耗值(输入值);
S-特征化因子,有污染物输出值对应中间点影响类别的参数;
F-重点损害值,终点损害类别的参数;
E-影响因子,计算中间点损害类别,中间点损害类别所占的比重;
W-权重因子,计算重点损害值类别时,中间点影响类别所占比重;
C-标准化值,重点损害类别单位统一后的结果;
Ci标准化因子,重点损害类别进行单位统一时的参数。
步骤一中评价对象包括烧结、高炉炼铁、炼钢、以及轧钢步骤。
步骤二中生产投入数据包括原材料铁矿石、锰矿石、水、氧气、蒸汽、煤炭、以及电力的耗用数据,并对用量单位进行统一。
与现有技术相比,本发明的有益效果是:
(1)现有的工业企业的废气减排效果好坏的衡量标准主要是废气处理率,这一指标较为简单笼统,不能反映废气排放量的减少对环境因素的影响大小和最终对人体健康、气候变化、生态质量和资源消耗等关键指标的影响。
(2)本发明创造性的将simapro生命周期分析工具应用于钢铁企业的废气减排成效评价,有利于量化废气排放量的减少对环境因素改善的作用,能够为钢铁企业的废气治理成效提供更加客观、详细的评价结果,为促进重点行业的废气治理提供技术支持。
本发明能够客观、定量的对钢铁企业废气减排成效导致的的环境负荷变化做出计算,为促进重点行业的废气治理提供技术支持。
具体实施方式
为了使本技术领域的人员更好地理解本发明方案,下面结合实施方式对本发明作进一步的详细说明;
抓取某华北地区甲钢铁企业的生产和废气产排放数据,应用基于生命周期的钢铁企业废气减排成效环境影响评价方法,进行环境影响评价。包括以下步骤:
步骤一:基于生命周期分析(LCA)的范围和定义,将钢铁企业的废气排放环节,主要包括烧结、高炉炼铁、炼钢、轧钢步骤,作为本方案的评价对象,实现“大门到大门”的生命周期环境影响评估;
步骤二:通过网络爬虫技术抓取目标钢铁企业的生产投入数据。主要包括:铁矿石、锰矿石、水、氧气、蒸汽、煤炭、电力等原材料的耗用数据,并对用量单位进行统一;
步骤三:通过网络爬虫技术抓取目标钢铁企业的产出数据和废气产排数据;
步骤四:根据步骤二和步骤三所得数据计算目标钢铁企业每生产一吨钢铁的能源和资源消耗;
其中每吨钢铁的能源和资源的消耗计算方法如下:
式中:Qi为能源或资源的年消耗量,单位t/Kwh/m3;
M为目标钢铁企业的年钢铁产量,单位t;
q为每吨钢铁的资源或能源消耗;
i为资源或能源的种类。
步骤五:根据步骤二和步骤三所得数据计算目标钢铁企业每生产一吨钢铁的废气产生量和废气排放量;
其中每吨钢铁的废气产生量和废气排放量计算方法如下:
式中:Pi为废气的年产生量,单位为t;
M为目标钢铁企业的年钢铁产量,单位为t;
a为生产每吨钢铁的废气产生量;
i为废气的种类。
式中:Di为废气的年排放生量,单位为t;
M为目标钢铁企业的年钢铁产量,单位为t;
b为生产每吨钢铁的废气产生量;
i为废气的种类。
步骤六:汇总步骤四和步骤五的计算数据,整理得到目标钢铁企业的生命周期清单,如表1示出;
表1
步骤七:将步骤七的清单数据录入生命周期软件Simapro,计算废气处理前后的中间点环境负荷并进行整理,如表2示出;
表2
步骤八:计算最终损害类别的影响,从而评估钢铁企业的废气减排成效和环境效益表3示出。
表3
根据步骤七和步骤八的计算结果,甲钢铁企业的生产废气经工艺处理后对气候变暖(Global warming)、土地酸化(Terrestrial acid/nutri)、水体酸化(Aquaticacidification)和可入肺颗粒物(Respiratory inorganics)4个评价中间点的环境负荷显著降低。对气候变化和人类健康的损害也有显著的降低。全面且量化的计算出污染物减排对环境和人体健康的影响是本发明的特点。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为发明的保护范围。
Claims (3)
1.一种基于生命周期分析的钢铁企业废气减排环境影响评价方法,其特征在于,包括下述步骤:
步骤一:基于生命周期分析LCA的范围和定义,将钢铁企业的废气排放环节,确定评价对象,实现“大门到大门”的生命周期环境影响评估;
步骤二:通过网络爬虫技术抓取目标钢铁企业的生产投入数据;
步骤三:通过网络爬虫技术抓取目标钢铁企业的产出数据和废气产排数据;
步骤四:根据步骤二和步骤三所得数据计算目标钢铁企业每生产一吨钢铁的能源和资源消耗;所述每吨钢铁的能源和资源的消耗计算方法如下:
式中:Qi为能源或资源的年消耗量,单位t/Kwh/m3;
M为目标钢铁企业的年钢铁产量,单位t;
q为每吨钢铁的资源或能源消耗;
i为资源或能源的种类;
步骤五:根据步骤二和步骤三所得数据计算目标钢铁企业每生产一吨钢铁的废气产生量和废气排放量;所述每吨钢铁的废气产生量和废气排放量,计算方法如下:
式中:Pi为废气的年产生量,单位为t;
M为目标钢铁企业的年钢铁产量,单位为t;
a为生产每吨钢铁的废气产生量;
i为废气的种类;
式中:Di为废气的年排放生量,单位为t;
M为目标钢铁企业的年钢铁产量,单位为t;
b为生产每吨钢铁的废气产生量;
i为废气的种类;
步骤六:汇总步骤四和步骤五的计算数据,整理得到目标钢铁企业的生命周期清单;
步骤七:将步骤七的清单数据录入生命周期软件Simapro,计算废气处理前后的中间点环境负荷和最终损害类别的影响,从而评估钢铁企业的废废气减排成效和环境效益;
步骤八:计算最终损害类别的影响,从而评估钢铁企业的废废气减排成效和环境效益;所述计算最终损害类别的影响,计算方法如下:
M=I×S
F=∑M×E×W
C=F×Ci×W
M-中间点损害值,中间点影响类别的结果值;
I-物质消耗值(输入值);
S-特征化因子,有污染物输出值对应中间点影响类别的参数;
F-重点损害值,终点损害类别的参数;
E-影响因子,计算中间点损害类别,中间点损害类别所占的比重;
W-权重因子,计算重点损害值类别时,中间点影响类别所占比重;
C-标准化值,重点损害类别单位统一后的结果;
Ci标准化因子,重点损害类别进行单位统一时的参数。
2.根据权利要求1所述的基于生命周期分析的钢铁企业废气减排环境影响评价方法,其特征在于,步骤一中评价对象包括烧结、高炉炼铁、炼钢、以及轧钢步骤。
3.根据权利要求1所述的基于生命周期分析的钢铁企业废气减排环境影响评价方法,其特征在于,步骤二中生产投入数据包括原材料铁矿石、锰矿石、水、氧气、蒸汽、煤炭、以及电力的耗用数据,并对用量单位进行统一。
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