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文氏栅洗涤器除尘脱硫实验研究 总被引:1,自引:1,他引:1
采用双碱法脱硫技术 ,在自行设计的多通道文丘里洗涤器 (简称文氏栅洗涤器 )进行模拟燃煤烟气的除尘脱硫试验。其试验过程是 :先在三种不同喉部参数 (分别称为 1# ,2 # ,3 # )的文氏栅洗涤器进行除尘试验 ,经过优选后 ,在 2 #文氏栅洗涤器上进行脱硫试验。试验结果表明经过优选的 2 #文氏栅洗涤器有着较高的除尘脱硫效率。当文氏栅洗涤器的运行参数为 :pH =12、液气比为 0 .75L/m3、 [Na+ ]=0 .3mol/L、 [SO2 ]=12 0 0× 10 -6,文氏栅洗涤器的除尘效率大于 96 % ,脱硫效率大于 80 %。经过完善后可用作中小型燃煤锅炉烟气的除尘脱硫 相似文献
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脱硫效率问题分析与整改 总被引:1,自引:0,他引:1
锅炉炉窑烟气脱硫是目前污染物减排最直接和重要的手段,脱硫效率作为重中之中摆在我们环保从业者面前。在锅炉烟气脱硫工程调试过程中,通常会出现脱硫效率达不到设计要求,通过一系列的分析测试,逐步排查从而找到脱硫效率低的原因,从而对症下药进行整改,达到设计要求。 相似文献
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为了探讨菱镁矿应用于火电厂湿法烟气脱硫的可能性,将不同等级菱镁矿加工成200目细粉,加蒸馏水配成质量分数为15%的脱硫剂浆液,在实验室内采用x(SO2)∶x(N2)=1∶570、SO2浓度为5004 mg·m-3的标准气体作为模拟气体进行烟气脱硫实验.研究了不同等级菱镁矿的脱硫性能、浆液pH值对脱硫率的影响.结果表明:随着反应时间的延长,菱镁矿浆液脱硫率逐渐降低;在相同脱硫时间内,不同浆液的脱硫率按菱镁矿等级排序是:一级菱镁矿>特级菱镁矿>二级菱镁矿>三级菱镁矿>风化石;各种浆液10 min内脱硫率为:特级菱镁矿浆液89%,一级菱镁矿浆液91%,二级菱镁矿浆液77%,三级菱镁矿浆液87%,风化石浆液50%;随着反应时间的延长,脱硫剂浆液pH值逐渐降低;pH值介于4.6~6之间时,浆液脱硫效果良好,脱硫率比较稳定,适用于火电厂湿法烟气脱硫工艺. 相似文献
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对云岗矿自行设计、施工的两台细管水膜除尘器投入运行后。脱硫除尘效果以及社会效益和经济效益作了总结分析。 相似文献
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Emission of SO2 from various industrial sources occurs in varying concentrations and quantities. The operation of scrubbers as SO2 control devices is getting more and more attention as pollution control regulations are tightened. Experimental investigations on the scrubbing of SO2 in a novel two‐stage hybrid (spray‐cum‐bubble column) scrubber using water and dilute sodium alkali are reported. Empirical and semi‐empirical correlations are developed for the prediction of the performances of the bubble and the spray sections in terms of various pertinent variables of the system for water and alkaline scrubbing, respectively. The contribution of the mass transfer enhancement factor towards the removal of SO2 has been exploited while developing the semi‐empirical correlation for the prediction of performance in alkaline scrubbing. The predicted values are in excellent agreement with the experimental values. Finally, the operating features of the scrubber and design aspects are discussed in order to develop our understanding for practical applications. 相似文献
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CaCO3脱硫剂对SO2的化学反应活性直接影响其烟气脱硫效率和脱硫剂的利用率.提高CaCO3的脱硫反应活性,对降低烟气脱硫生产成本具有重要的意义.在高1.1 m、内径12.5 cm的流化床反应器内的半干法烟气脱硫过程中,利用CO2气体为活化介质对CaCO3脱硫剂浆液进行活化处理,并以活化后的CaCO3为脱硫剂,实验研究了CO2活化对CaCO3脱硫剂烟气脱硫效率的影响.结果表明,CO2气体对CaCO3的活化处理,增大了CaCO3在溶液中的溶解度,提高了CaCO3与SO2间反应的活性,促进了CaCO3脱硫剂烟气脱硫效率的显著提高.在实验条件下,当饱和接近度为15~18 K、钙硫比为1.2、脱硫剂粒径为64 μm时,经CO2气体活化后的CaCO3脱硫剂其脱硫效率达到92%,接近于相同条件下Ca(OH)2的脱硫效率.该研究结果为提高CaCO3脱硫剂的烟气脱硫反应活性,提供了一种新的工艺技术方法. 相似文献
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改良 A .D.A法单脱硫能使脱硫效率达到 99.5 % ,PDS法单脱硫能使脱硫效率达到 99.7% ,但都不稳定。要保证高而稳定的脱硫效率 ,采用双脱硫工艺是一种较好的方法 相似文献
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P.S. ValimbeV.M. Malhotra 《Fuel》2002,81(10):1297-1304
Massive quantities of flue gas desulfurization scrubber sludges, both sulfate- and sulfite-rich, are generated by coal burning power plants. Environmentally friendly but economical disposal of this sludge is of great importance to the coal industry. To achieve the goal of effective utilization of the scrubber sludges, we have begun to explore developing value-added materials from these sludges. In this paper, we report how water-to-scrubber sludge (w/s) ratio and the fabrication temperature affected the crystal growth behavior of the sludge under pressure. This was accomplished by conducting scanning electron microscopy, X-ray diffraction, Fourier transform infrared, differential scanning calorimetry, and thermomechanical analyzer measurements on the samples formed at 24.2 MPa. Our results suggest that the hydration of hemihydrate, generated from the sludge, resulted in the formation of two phases of calcium sulfate in our materials formed at four different temperatures using two different w/s ratio settings. At T<130 °C, parallelogram-shaped (columnar) gypsum (CaSO4·2H2O) and rectangular-shaped (acicular) β-hemihydrate (CaSO4·0.5H2O) crystals dominated our materials for w/s=0.2. However, for w/s=0.6, needle-shaped but orientated crystallites formed in the samples. At T>130 °C, the samples mainly exhibited hemihydrate phase in the form of fibrous growths formed by the splitting of gypsum crystallites. The samples fabricated at 90°C exhibited a higher degree of interlocking of the crystallites, which imparted better mechanical property to our materials as depicted by the fracture strength. 相似文献
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综合喷淋洗涤、文丘里高效混合、旋风分离、拦截除雾等功能结构特点,研究开发出一种高效率的除尘脱硫一体化设备。实验和工程实例表明,该设备除尘脱硫效率高,投资运行费用低,除尘效率达98%,脱硫效率大于80%。高效除尘脱硫一体化设备适用于中小锅炉的烟气除尘脱硫处理。 相似文献
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铁法烟气脱硫制备聚合硫酸铁及其混凝效果研究 总被引:1,自引:0,他引:1
研究了在填料吸收塔中以FeS04溶液为吸收液,加入一定量的NaCl03为氧化剂,利用烟气中二氧化硫生产水处理剂聚合硫酸铁(PFS)的工艺过程。脱硫氧化实验结果表明,在高效脱硫前提下可以生产符合国家标准的PFS产品。为了考察自制PFS产品与工业PFS产品的混凝性能差别,选择四川宜宾化纤废水生化出水、高岭土模拟浊度废水和辽宁无线电二厂含磷废水分别进行去除COD、浊度和PO4^3-的混凝实验。自制PFS产品完全可以达到常规废水混凝处理的要求,并且能得到比工业PFS产品更好的COD、浊度和PO4^3-的去除效果。 相似文献
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印染废水和烟气脱硫联合治理的试验研究 总被引:3,自引:0,他引:3
论述了碱性印染废水和中小型锅炉烟气除尘脱硫联合治理的试验研究。利用锅炉原有湿式除尘系统,既保证了除尘效果,又达到烟气脱硫和净化废水的作用,脱硫效果良好。预处理后的废水,用铁屑和粉煤灰、生化池作为后续处理,可实现达标排放,取得了较好的环境效益和经济效益。 相似文献
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In a coal combustion process, a considerable amount of selenium is captured in the wet FGD, where it is oxidized from selenite to selenate , which is difficult to remove. Diethyl-p-phenylene-diammonium (DPD) absorptiometric analysis and ion chromatography identified peroxodisulfate ion as the dominant oxidizing agent in the FGD liquor. Selenite was easily oxidized to selenate in the presence of and the oxidation was accelerated as the temperature increased. Addition of Mn2+ ion was found to be effective in controlling selenate formation. When Mn2+ ion was added, oxidized not selenite to selenate but rather Mn2+ to MnO2, which captured some dissolved selenite. 相似文献