| 白泥烟气脱硫技术与燃煤电厂工程应用 |
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| 引用本文： | 王相凤,王凡,路光杰,黄家玉,张凡,封雨田,刘永岩.白泥烟气脱硫技术与燃煤电厂工程应用[J].环境科学研究,2018,31(9):1597-1602. |
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| 作者姓名： | 王相凤 王凡 路光杰 黄家玉 张凡 封雨田 刘永岩 |
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| 作者单位： | 1.中国环境科学研究院, 北京 100012 |
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| 基金项目： | 国家"863计划"课题项目（No.2012AA06A113）；山东省重点研发计划（No.2018CXGC1015） |
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| 摘 要： | 系统地考察了白泥的物化特性、白泥脱硫浆液的特性，并对w（白泥浆液）、pH等因素对脱硫性能的影响进行了研究.在国电肇庆热电有限公司2×350 MW超临界锅炉机组上开展了工程化应用研究，对比研究了白泥脱硫与传统石灰石-石膏法脱硫的性能与石膏副产物特性.结果表明:w（白泥浆液）和pH对脱硫效率影响较为明显，w（白泥浆液）低于12.5%的条件（5.0%、8.0%）下，pH由10.0减至6.0时，脱硫效率逐渐减小；w（白泥浆液）为12.5%的条件下，pH对脱硫效率的影响基本可以忽略；在三层浆液喷淋填料塔内，液气比为8 L/m3，空塔气速为0.4 m/s，脱硫效率最高可达96.7%以上.350 MW燃煤电厂白泥脱硫工程应用结果表明，采用单塔双循环工艺，在运行负荷为240~249 MW范围内，ρ（SO2）为1 948~1 999 mg/m3的条件下，白泥脱硫的效率（99.25%~99.49%）优于石灰石-石膏法（99.18%~99.20%）；白泥作为脱硫剂时，烟气出口ρ（SO2）最低仅为10 mg/m3，可满足超低排放标准对SO2控制的要求.研究显示，与石灰石-石膏法生成的石膏副产物相比，白泥脱硫石膏在酸不溶物、含水率等指标及外观方面基本接近，符合建材制品要求，满足副产物资源化要求.
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| 关 键 词： | 白泥 烟气脱硫 工程示范 以废治废 |
| 收稿时间： | 2017/12/29 0:00:00 |
| 修稿时间： | 2018/5/4 0:00:00 |
Flue-Gas Desulfurization Technology Using Solid Waste White Mud and Engineering Application in Coal-Fired Power Plant |
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| WANG Xiangfeng,WANG Fan,LU Guangjie,HUANG Jiayu,ZHANG Fan,FENG Yutian and LIU Yongyan.Flue-Gas Desulfurization Technology Using Solid Waste White Mud and Engineering Application in Coal-Fired Power Plant[J].Research of Environmental Sciences,2018,31(9):1597-1602. |
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| Authors: | WANG Xiangfeng WANG Fan LU Guangjie HUANG Jiayu ZHANG Fan FENG Yutian and LIU Yongyan |
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| Affiliation: | 1.Chinese Research Academy of Environmental Sciences, Beijing 100012, China2.Beijing Longyuan Environmental Engineering Co., Ltd., Beijing 100029, China3.Zhaoqing Thermal Power Co., Ltd., Zhaoqing 526238, China |
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| Abstract: | In this paper, the physicochemical characteristic of white mud and the characteristics of white mud slurry were systematically investigated, and the influence of factors such as slurry concentration and pH on the desulfurization performance was studied. An engineering application study was carried out on a supercritical boiler unit with 2×350 MW power generation at Guodian Zhaoqing Thermal Power Co., Ltd.. The performance of white mud desulfurization and traditional limestone-gypsum desulfurization and the characteristics of gypsum by-products were comparatively studied. The results showed that the influence of white mud slurry concentration and pH on the removal of SO2 was significant. When the slurry concentration was lower than 12.5% (5% and 8%), the desulfurization efficiency gradually decreased when the pH value decreases from 10.0 to 6.0. The influence of pH value on desulfurization efficiency was basically negligible when the slurry concentration was 12.5%. In a three-layer slurry spray packing tower, the liquid-gas ratio was 8 L/m3, and the air velocity of the empty tower is 0.4 m/s. The highest desulfurization efficiency was above 96.7%. By using the single-tower double-cycle process, the results for the engineering application of white mud desulphurization in a 350 MW coal-fired power plant showed that the effect of white mud desulfurization was better than that of the limestone-gypsum method within the operating load range of 240-249 MW under SO2 flue gas concentration of 1948-1999 mg/m3. The desulfurization efficiency of white mud was 99.25%-99.49%, which is slightly higher than that of the limestone-gypsum method with the value of 99.18%-99.20%. When the white mud was used as the desulfurizer, the lowest SO2 concentration at the flue gas outlet was only 10 mg/m3, meeting the requirements of the ultra-low emission standard for SO2 control. Compared with gypsum by-products produced by the limestone-gypsum method, the white mud desulfurization gypsum by-products were essentially similar in the aspects of acid insolubility, moisture content, and other indicators and appearance; these were in accord with the requirements for building material products; and satisfied the requirements of by-product resources. |
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| Keywords: | solid waste white mud flue gas desulfurization engineering demonstration waste control by waste |
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