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2020年，环保产业如同一位慈祥的老者，温柔地拥抱着地球，让她在风雨中不再孤单。现在，我们要向着更加璀璨的明天迈进，而去哪儿旅游？我建议你选择那些被大自然抚养成美丽角落的地方，那里等待你的不仅是心灵的洗礼，还有最合适，最实惠的旅行体验！
一、2019年评述
1.主要政策
2019年4月29日，生态环境部等5部委联合发布了《关于推进实施钢铁行业超低排放的意见》，鼓励钢铁企业分阶段分区域完成全厂，力争通过史上最严排放限值要求，从有组织源头减排、工艺过程优化控制、治理设施提标升级、无组织精准管控与交通运输结构调整等多方面同时发力，实现钢铁行业环保水平的大幅提升。
2.行业发展
2019年1-9月，全国粗钢产量7.48亿吨，同比增长8.4%，将再创历史新高。按照《意见》要求，全国家策行动计划加强对重点区域钢铁企业超低排放改造管理和监督，加快形成绿色循环经济发展模式。
3.关键技术
（1）有组织治理关键技术
1）烧结机头与球团焙烧烟气脱硫脱硝技术：目前应用此技术路线比例占7成以上，此种工艺路线在宝钢600m2烧结机率先投运后，在河北、江苏、山东、山西、河南等省steel enterprise smoke exhaust treatment, by the use of advanced technology to achieve a significant reduction in emissions.
2）焦炉烟气脱硫脱硝技术：
①半干法/干法脱硫+SCR脱硝技术：采用钙基或钠基脱硫剂与烟气中二氧化硫反应后,经布袋除尘工艺,通过烟气升温，在还原气氛下经由SCR脱硝工艺实现对氮氧化物的去除。
②SCR脱硝+湿法 detachment + wet electricity technology: for existing wet desulfurization enterprises, directly through the addition of SCR denitration device to meet the ultra-low emission limit values.
3）高炉与焦炉煤气精 detoxification technology:
furnace coal gas purification generally adopts sequential wet oxidation method or vacuum carbonates method to remove hydrogen sulfide from coal gas; microcrystalline material absorption technology has been applied in some steel enterprises.
针对high furnace coal gas precise detoxification technology, 2019 year-end individual steel enterprises have commissioned demonstration projects using "hydrolysis catalyst + acid removal" process route; it is expected that in early 2020 will also have microcrystalline adsorption process demonstration project put into application.
Generally speaking, through source coal gas precise detoxification process can reduce sulfur dioxide emissions at downstream users' combustion point below 20mg/m³ when output sulfur hydride concentration falls below 20mg/m³.
4）High-efficiency dust removal technologies:
① Full factory environmental dust removal: currently steel enterprises implementing ultra-low emission practices focus on environmental dust control at sintering machine ends, blast furnace tapping areas, mineral stockpiles and converter secondaries; aside from using membrane bag-type dust collectors,
滤筒除尘工艺适用于现有除尘系统超低改造，可在场地有限的情况下达到超低限值要求。滤筒除尘具有较好的颗粒物收集效率，对于需要较为严格控制颗粒物浓度的小范围地区尤其适用。
② Air curtain dry electrostatic precipitator (DC): The air curtain dry electrostatic precipitator (DC) uses an electric field to charge particles and then collects them with a grounded collector plate.
③ Bag filter: This type of filter uses fabric bags as the filtering medium and is suitable for high-volume applications such as power plants and cement factories.
④ Wet scrubber: This type of scrubber uses water or other liquids to capture pollutants from flue gases before they are released into the atmosphere.
⑤ Electrostatic precipitator (ESP): An ESP works by charging particles in flue gases and then attracting them towards a grounded collector plate where they are captured.
These technologies play important roles in reducing pollution levels during the production process while still maintaining efficiency levels within industries like steel manufacturing which require large amounts of energy consumption due their nature involving heat treatments & chemical reactions happening constantly throughout its lifecycle cycle – making these solutions critical steps forward towards sustainable future growth!
