纯碱软化-汽提脱氨法处理SE水煤浆气化废水 |
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引用本文: | 陈永勤.纯碱软化-汽提脱氨法处理SE水煤浆气化废水[J].石油炼制与化工,2022,53(12):91-96. |
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作者姓名: | 陈永勤 |
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作者单位: | 中国石化镇海炼化分公司 |
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摘 要: | 对纯碱软化-汽提脱氨法预处理SE水煤浆气化废水的工业化运行效果进行分析。结果表明,在控制废水流量为160m3/h,废水pH为10.5~11,沉降槽依次投加NaOH、Na2CO3、聚合氯化铝(PAC)和聚丙烯酰胺(PAM),汽提塔维持蒸汽流量为7.5~8.5t/h、压力为0.14~0.16MPa、塔釜温度不大于125℃的条件下,出水硬度可降至174mg/L、氨氮质量浓度降至17mg/L,各项污染物指标优于设计值。
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关 键 词: | 气化废水 高氨氮 高硬度 纯碱软化 汽提脱氨 pH |
收稿时间: | 2022-03-30 |
修稿时间: | 2022-05-13 |
TREATMENT OF GASIFICATION WASTEWATER FROM SE COAL WATER SLURRY BY SODIUM CARBONATE SOFTENING-STRIPPING AMMONIA REMOVAL PROCESS |
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Abstract: | The industrial operation effect of pretreatment of gasification wastewater from SE coal slurry by sodium carbonate softening-stripping ammonia removal process in a refinery was analyzed. The results showed that when the wastewater flow rate was 160 m3/h, pH of the wastewater was 10.5-11,the chemicals addition order of sedimentation tank was NaOH, Na2CO3, polymeric aluminium chloride (PAC), polyacrylamide (PAM), the steam flow rate of the stripper was 7.5-8.5 t/h, the pressure was 0.14-0.16 MPa, and the temperature at the column kettle was not more than 125 ℃, the discharge concentration of hardness and ammonia-nitrogen of wastewater could be reduced to 174 mg/L and 17 mg/L respectively, and the pollutant indexes were better than the design values. |
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Keywords: | gasification wastewater high ammonia nitrogen high hardness sodium carbonate softening steam stripping deamination pH |
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