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| 论文编号: |
122214O120140010 |
| 第一作者所在部门: |
202组 |
| 中文论文题目: |
Treatment of high strength coking wastewater by supercritical water oxidation
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| 英文论文题目: |
Treatment of high strength coking wastewater by supercritical water oxidation
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| 论文题目英文: |
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| 作者: |
毕继诚
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| 论文出处: |
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| 刊物名称: |
Fuel
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| 年: |
2013
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| 卷: |
104 |
| 期: |
104 |
| 页: |
77-82 |
| 联系作者: |
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| 收录类别: |
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| 影响因子: |
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| 摘要: |
Two kinds of coking wastewater were treated by supercritical water oxidation (SCWO) in a continuousflow reactor using hydrogen peroxide (H2O2)as an oxidant. These wastewater contained high concentrations of ammonia nitrogen (NH3–N), phenol, chemical oxygen demand (COD) and inorganic salts. Asalt separator was applied for the separation of salts in the SCWO process to solve the problem of reactor plugging due to salt precipitation. Experiments were conducted to investigate the effects of the temperature, pressure, excess oxygen and residence time on the destruction of pollutants (includes NH3–N, phenol and COD). The efficiency of the salt separator was also investigated. Results showed that both phenol and COD can be easily destructed in SCWO process. NH3–N was inert and its conversion increased noticeably as the temperature and excess oxygen increased. At the condition of 650 Cand 300% excess oxygen, the conversions of all pollutants were over 99.94% and the effluent met the first grade discharge standard of China. The results also indicated that the efficiency of salt separation increased with an increasing temperature. By controlling the temperature of salt separator at 600 C, more than 87% of the salts were separated from coking wastewater. |
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