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大唐托电:火力发电也要向绿色做加法

2017-09-05 06:31:53   中国青年网

在超低排放改造中,托电又在原有的脱硫、脱硝和除尘的基础上,进行了升级改造。如在脱硝过程中,将原有催化剂层数均提升到三层,进一步增加了脱硝的处理能力,使脱硝效率提高到90%以上;在脱硫环节,对脱硫塔进行扩容,增加喷淋层,对内部除尘装置改造提效,提高了去除二氧化硫的能力。

“现在国家对二氧化硫的排放标准是35毫克/立方米,我们已经控制到30毫克左右/立方米。”方亮告诉记者。在除尘环节上,托电最早采用电除尘或布袋除尘方式。进行超低排放改造时,企业在脱硫塔内部新增了高效管式除尘器,并对旧的电除尘内部进行改造维护,提高除尘力。

过去一说污染,很多人就容易拿烟囱说事儿。但现在,火电厂烟囱里冒出的绝大部分都是水蒸气。“目前,三项大气污染(二氧化硫、氮氧化合物、粉尘)排放量完全符合国家标准,而改造完成的机组在三项污染物排放上将优于国家标准。”

对于节能减排的意义,10多年前,方亮还没有太大的感受,只是觉得要完成减排目标而已。但随着近年来雾霾天气增多,他越发觉得环境保护的重要性。

“如果不上脱硫装置,二氧化硫的排放量将会比现在高出100倍。”在进行改造的过程中,让方亮印象深刻的是2012年,企业为了进行脱硝改造,需要在附近选址建立氨区,用液氨原理进行脱硝,因为氨区是危险源,同事们都在加班加点保证设备安全。“那时候还是冬季,大家都很辛苦。”

改造验收的那一刻,方亮看到氮氧化合物的排放量有了明显下降。“那一刻觉得很有荣誉感。”方亮告诉记者,现在很多企业在脱硝中大部分都是采用液氨原理,但氨区也是危险源,因此托电正在计划用尿素原理替换液氨,“相比液氨,尿素脱硝的方法更加安全。”

在大唐托电机组控制室的检测屏幕最上方,实时可见的各项指标的排放情况。一旦超标,数值就会由绿色变为红色。“这些数据也已经和国家的环保平台进行对接,实时传输到平台上。”方亮说。

截至今年7月底,大唐托电累计发电量达3569.80亿千瓦时,连续安全生产十一年。

“我们有12台机组,每天都在高速运转,这些都是高温高压的设备,保证设备长期安全稳定运行很不容易。”王东升告诉记者,企业12台机组一年下来大修小修不断,经常需要轮班维修,“我们已经形成了有效的安全管理和理念”。

在人才培养上,王东升表示,托电长期以来形成了一套人才培养的机制,“这些年我们面向大唐集团系统内外,输出的专业人才和干部人才已有三、四百人,我们的技术能手参加专业技能大赛,获奖率非常高。”

王东升说,现在企业按照国家要求正在做煤场封闭,“过去,煤场封闭很多是在南方,为了保障雨季中能够正常作业。现在为了减少煤厂在取煤、卸煤过程中造成的污染,政府要求企业实现煤厂封闭,我们正在做这件事。”

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